Patent Publication Number: US-2020290562-A1

Title: Vehicle control device

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2019-047527, filed on Mar. 14, 2019; the entire contents of which are incorporated herein by reference. 
     FIELD 
     One or more embodiments of the present invention relates to a vehicle control device. 
     BACKGROUND 
     In the related art, there have been suggested various inventions related to a leaving alarm device on the assumption that a child is left behind in a vehicle. 
     For example, in a child leaving alarm device described in JP-A-2012-188035, an alarm is implemented on the condition that a child seat is attached to a vehicle and a child seat belt is in a wearing state. 
     Further, the child leaving alarm device of JP-A-2012-188035 determines a degree of the possibility that the child is left behind from the situation of the vehicle, and implements first alarm means or second alarm means in accordance with the degree of the possibility. 
     However, the child leaving alarm device of JP-A-2012-188035 selects and implements the alarm means in accordance with the degree of the possibility that the child is left behind. Therefore, in the child leaving alarm device of JP-A-2012-188035, even in a situation where the driver recognizes that the child is in a left-behind state (for example, in a case where the driver leaves the vehicle for a short period of time for errands), that is, even in a situation where the necessity of outputting a leaving alarm is low, an alarm is output when a predetermined alarm condition is satisfied. Further, when an alarm is output, there is a problem that an operation for stopping the alarm is troublesome. 
     One or more embodiments of the present invention has been made in view of the above-described problems, and an object thereof is to output a preliminary alarm before a formal alarm to prevent an inadvertent formal alarm. In addition, after the alarm is output, the output of the alarm is stopped without performing a troublesome operation. 
     SUMMARY 
     In order to solve the above-described problem, in one or more embodiments of the present invention, there is provided a vehicle control device that performs predetermined control on a vehicle by communicating with a portable device held by a user, the vehicle control device including: a living body sensor that detects whether or not a living body is present in the vehicle by acquiring biological information of the living body; an output device that outputs an alarm; and an alarm output determination unit that determines the alarm to be output by the output device by detecting the presence of the living body in the vehicle by the living body sensor and satisfying a predetermined condition for outputting the alarm, wherein when the portable device and the vehicle control device communicate with each other after the alarm is output by the output device, the output device stops outputting the alarm. 
     According to one or more embodiments of the invention, a preliminary alarm can be output prior to a formal alarm, and an inadvertent formal alarm can be prevented. After the alarm is output, the output of the alarm can be stopped without a troublesome operation. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIGS. 1A and 1B  are views illustrating a vehicle on which a vehicle-mounted control device according to an embodiment of the invention is installed and a portable device. 
         FIG. 2  is a block diagram illustrating a functional configuration of a vehicle control system according to the embodiment of the invention. 
         FIG. 3  is a flowchart illustrating an example of a preliminary alarm according to the embodiment of the invention. 
         FIG. 4  is a flowchart illustrating an example of a preliminary alarm according to the embodiment of the invention. 
         FIG. 5  is a flowchart illustrating an example of a formal alarm according to the embodiment of the invention. 
         FIG. 6  is a flowchart illustrating an example of the preliminary alarm according to the embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     In embodiments of the invention, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to one of ordinary skill in the art that the invention may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid obscuring the invention. 
     Hereinafter, an embodiment of the present invention will be described in detail. The same members as those of the above-described embodiment will be given the same reference numerals, and the description thereof will be omitted. 
       FIGS. 1A and 1B  are views illustrating a vehicle  50  on which a vehicle-mounted control device  10  according to an embodiment of the invention is installed and a portable device  20 . 
     As illustrated in  FIG. 2 , a vehicle control system  100  includes the vehicle  50  and the portable device  20 . 
     A broken line (illustrated in  FIGS. 1A and 1B ) that surrounds the vehicle  50  indicates a range in which a radio wave (response request signal) transmitted from an LF transmitting unit  2  (first transmitting unit) included in the vehicle-mounted control device  10  reaches. As illustrated in  FIG. 1B , when the portable device  20  of a user  200  of the vehicle  50  enters the range in which the response request signal transmitted from the LF transmitting unit  2  reaches, the response signal is sent to the LF transmitting/receiving unit of the vehicle-mounted control device  10  from the portable device  20 . The exchange between the portable device  20  and the vehicle-mounted control device  10  will be described later in detail. 
     (Schematic Configuration of Vehicle-Mounted Control Device) 
     As illustrated in  FIG. 2 , the vehicle-mounted control device  10  includes a control unit  1 , an LF transmitting unit  2 , a UHF receiving unit  3  (first receiving unit), and a communication unit. 
     The control unit  1  includes a CPU, a memory, and the like. 
     The LF transmitting unit  2  includes LF transmitting antennas  2   a , a transmission signal processing unit (not illustrated), and the like. 
     Although not illustrated, the LF transmitting antennas  2   a  are installed on the right side surface, the left side surface, the rear surface, and the vehicle interior of the vehicle  50 . 
     The LF transmitting unit  2  transmits an LF signal (a signal of an LF band) generated by the transmission signal processing unit to the portable device  20  outside the vehicle or inside the vehicle from the LF transmitting antennas  2   a . The LF signal transmitted by the LF transmitting unit  2  includes a response request signal for requesting a response to the portable device  20 . 
     The UHF receiving unit  3  includes a UHF transmitting/receiving antenna  3   a , a reception signal processing unit (not illustrated), the transmission signal processing unit (not illustrated), and the like. 
     The UHF receiving unit  3  receives a UHF signal (a signal of a UHF hand) transmitted from the portable device  20  by the UHF transmitting/receiving antenna  3   a  and the reception signal processing unit. 
     In addition, the UHF receiving unit  3  transmits the UHF signal generated by the transmission signal processing unit to the portable device  20  outside the vehicle or inside the vehicle from the UHF transmitting/receiving antenna  3   a.    
     The control unit  1  performs wireless communication with the portable device  20  via the LF transmitting unit  2  and the UHF receiving unit  3 , and transmits and receives the LF signal, the UHF signal, and various information to and from the portable device  20 . 
     The communication unit  4  communicates with a communication unit  42  of a vehicle alarm control device  30  by, for example, Car Area Network (CAN). 
     (Control Target of Vehicle-Mounted Control Device) 
     The vehicle-mounted control device  10  is connected to each of a power supply device  11 , a start switch  12 , a door lock device  13 , a door opening/closing device  14 , a vehicle speed sensor  15 , a transmission  16 , and an output device  17 . 
     The power supply device  11  is configured with a battery or the like. The power supply device  11  supplies electric power of the battery to each unit of the vehicle  50 . 
     The start switch  12  is installed in the vehicle interior of the vehicle  50 . The start switch  12  is operated by the user  200  to drive and stop a traveling driving source of the vehicle  50 , and to turn on and off the power. Further, as a power source which is turned on and off by the operation of the start switch  12 , there are an ignition (IG) and an accessory (ACC). 
     The door lock device  13  includes a mechanism for locking and unlocking each door of the vehicle  50 , and a driving circuit for the mechanism. 
     The door opening/closing device  14  includes a mechanism for opening/closing a power sliding door (hereinafter, referred to as “PSD”) of the vehicle  50 , and a driving circuit of the mechanism. 
     The vehicle speed sensor  15  detects the traveling speed of the vehicle  50 . The vehicle speed sensor  15  sends the detection result to the control unit of the vehicle-mounted control device  10 . 
     The transmission  16  is a device for optimally switching the rotation of the engine of the vehicle  50  in accordance with the traveling conditions. The control unit of the vehicle-mounted control device  10  (which will be described later) detects the shift position of the transmission  16  by a sensor (not illustrated). 
     The output device  17  outputs an alarm based on an instruction from the control unit  1 . Examples of the output device  17  for outputting the alarm toward the inside of the vehicle include an in-vehicle buzzer (not illustrated), a room lamp (not illustrated), and a speaker (not illustrated) of the car navigation system. Examples of the output device  17  for outputting an alarm toward the outside of the vehicle include a welcome lamp  17   a , a horn  17   b , a portable device buzzer, a hazard lamp  17   d , a head lamp  17   e , a warning lamp (not illustrated), and a winker (not illustrated). The output device  17  is connected to the vehicle-mounted control device  10 , and the output of the alarm is controlled by the control unit  1 . The welcome lamp  17   a , the horn  17   h , the buzzer  17   c , the hazard lamp  17   d , the head lamp  17   e , and the like are examples of the output device  17 , and other vehicle-mounted devices may be used as long as an alarm can be output. 
     (Configuration of Portable Device) 
     The portable device  20  includes an electronic key. The portable device  20  includes the control unit  1 , an LF receiving unit  22  (second receiving unit), a UHF transmitting unit  23  (second transmitting unit), and an operation unit  24 . 
     Each of the units  21  to  24  of the portable device  20  is operated by electric power of a battery (not illustrated) incorporated in the portable device  20 . 
     The control unit  21  includes a CPU, a memory, and the like. 
     The LF receiving unit  22  includes an LF receiving antenna  22   a , a reception signal processing unit (not illustrated), and the like. The LF receiving unit  22  receives the LF signal transmitted from the vehicle-mounted control device  10  by the LF receiving antenna  22   a  and the reception signal processing unit. The LF signal received by the LF receiving unit  22  includes a response request signal. 
     The UHF transmitting unit  23  includes a UHF transmitting/receiving antenna  23   a , a transmission signal processing unit (not illustrated), a reception signal processing unit (not illustrated), and the like. The UHF transmitting unit  23  transmits the UHF signal generated by the transmission signal processing unit from the UHF transmitting/receiving antenna  23   a  to the vehicle-mounted control device  10 . 
     The UHF transmitting unit  23  receives the UHF signal transmitted from the vehicle-mounted control device  10  by the UHF transmitting/receiving antenna  23   a  and the reception signal processing unit. 
     The control unit  21  performs wireless communication with the vehicle-mounted control device  10  via the LF receiving unit  22  and the UHF transmitting unit  23 , and transmits and receives an LF signal, a UHF signal, and various information to and from the vehicle-mounted control device  10 . 
     The operation unit  24  includes operation keys, a display, and the like. The operation unit  24  is provided with an operation button operated to lock and unlock each door of the vehicle  50 , an operation button operated to open and close the PSD, and the like. 
     (Communication Method Between Vehicle-Mounted Control Device and Portable Device) 
     The wireless communication method performed between the vehicle-mounted control device  10  and the portable device  20  includes, for example, a passive entry method, a polling method, and a keyless entry method. 
     (Passive Entry Method) 
     In the passive entry method, when the user  200  who carries the portable device  20  approaches the vehicle  50  and a passive request switch (not illustrated) installed in the vehicle is turned on, the control unit  1  of the vehicle-mounted control device  10  transmits the response request signal to the portable device  20  through the LF transmitting unit  2 . When receiving the response request signal, the portable device  20  returns the response signal to the UHF receiving unit  3  of the vehicle-mounted control device  10  via the UHF transmitting unit  23 . Then, when receiving the response signal by the UHF receiving unit  3 , the vehicle-mounted control device  10  performs authentication of the portable device  20  based on an ID code of the portable device  20  included in the response signal, and when the authentication is successful, for example, the unlocking or opening operation of the door of the vehicle  50  is executed. Further, locking and closing operations, turning on and off the power of the vehicle  50 , driving and stopping of the engine, lighting of lamps, and the like may be performed. 
     (Polling Method) 
     In the polling method, regardless of the position of the portable device  20 , the control unit  1  of the vehicle-mounted control device  10  intermittently transmits the response request signal to the portable device  20  by the LF transmitting unit  2  at a constant cycle. When receiving the response request signal, the portable device  20  returns the response signal to the UHF receiving unit of the vehicle-mounted control device  10  via the UHF transmitting unit  23 . Then, when receiving the response signal by the UHF receiving unit  3 , the vehicle-mounted control device  10  performs authentication of the portable device  20  based on the ID code of the portable device  20  included in the response signal, and when the authentication is successful, for example, the unlocking or opening operation of the door of the vehicle  50  is executed. Further, locking and closing operations, turning on and off the power of the vehicle  50 , driving and stopping of the engine, lighting of lamps, and the like may be performed. 
     (Keyless Entry Method) 
     The keyless entry method is a function of performing remote operation of locking or unlocking of the door of the vehicle  50  by operating the portable device  20  without using a physical key. 
     More specifically, when the remote operation signal transmitted from the UHF transmitting unit  23  of the portable device  20  is received by the UHF receiving unit  3  of the vehicle-mounted control device  10 , the control unit  1  collates the ID of the portable device  20  included in the remote operation signal with the ID of the vehicle-mounted control device  10 . When both IDs match each other, the control unit  1  determines that the authentication of the portable device  20  is successful, permits the control of the door lock device  13  based on the remote operation signal, and locks and unlocks the door of the vehicle  50 . 
     (Control Target of Vehicle Alarm Control Device) 
     As illustrated in  FIG. 2 , the vehicle alarm control device  30  is connected to each of a temperature sensor  31 , a living body sensor  32 , and a CO sensor  33 . 
     The temperature sensor  31  is a sensor for detecting the temperature of the inside of the vehicle. The temperature sensor  31  detects the temperature of the inside of the vehicle, but may be a temperature and humidity sensor for detecting temperature and humidity of the inside of the vehicle. In this case, a sensor for detecting humidity is further provided. 
     The living body sensor  32  is a sensor for detecting a biological signal of an infant who is present in the vehicle. The living body sensor  32  is a non-contact sensor, and detects biological information such as a pulse, respiration, or heartbeat from the movement of the surface of the body of the infant. The detection target of the living body sensor  32  is an infant, but may be another living body, for example, an elementary school student or a person who requires nursing care. 
     The CO sensor  33  is a sensor for detecting the carbon monoxide concentration in the vehicle. 
     As the CO sensor  33 , there are various methods such as a semiconductor method, a hot wire semiconductor method, a solid electrolyte method, and a constant potential electrolysis method, but any method may be adopted as long as it is possible to detect the carbon monoxide concentration in the vehicle. The CO sensor  33  detects whether or not the carbon monoxide concentration in the vehicle is equal to or higher than a predetermined value. 
     (Schematic Configuration of Vehicle Alarm Control Device) 
     The vehicle alarm control device  30  includes a control unit  41 , a communication unit  42 , a vehicle door information input unit  43 , a vehicle speed information input unit  44 , a timer  45 , and a storage unit  46 . 
     The control unit  41  includes a CPU, a memory, and the like. The control unit  41  includes a danger degree determination unit  41   a , an alarm level setting unit  41   h , and an alarm output determination unit  41   c.    
     The danger degree determination unit  41   a  determines whether or not the living body that is present in the vehicle is in a dangerous state. Specifically, the danger degree determination unit  41   a  determines whether or not the living body that is present in the vehicle is in a dangerous state based on information acquired from each of the living body sensor  32 , the temperature sensor  31 , and the CO sensor  33 , locking/unlocking information acquired by the control unit  1  from the vehicle  50 , and information acquired from the timer  45 . 
     The danger degree determination unit  41   a  acquires a determination reference value from the storage unit  46 , and determines the danger degree by comparing the determination reference value with the vital sign detected by the living body sensor  32 , the temperature detected by the temperature sensor  31 , and the CO concentration detected by the CO sensor  33 . 
     In addition, the danger degree determination unit  41   a  may determine the danger degree based on a “variation value” indicating how much the vital sign detected from the infant who is present in the vehicle fluctuates compared to the determination reference value. When the danger degree is determined by the danger degree determination unit  41   a  based on the variation value, for example, a detection result detected when the infant gets on the vehicle  50  may be used as an initial value of the vital sign of the infant who is present in the vehicle. In this case, the initial value is stored in the storage unit  46 . 
     The vital sign of the infant who is present in the vehicle may be acquired at all times from the time when the infant gets on the vehicle  50 , or may be acquired intermittently. In the embodiment, an example is given in which the vital sign is acquired from the time when the infant gets on the vehicle, but when the variation value from the determination reference value can be calculated, the vital sign of the infant may be detected at any timing. 
     (Abnormal Value) 
     The danger degree determination unit  41   a  may determine whether or not the living body who is present in the vehicle is in a dangerous state based on whether or not the numerical value detected by the temperature sensor  31  or the CO sensor  33  indicates an abnormal value. Here, the abnormal value of the in-vehicle temperature is a numerical value that exceeds the upper limit or falls below the lower limit of the set value, with reference to the preset set value of the in-vehicle temperature. The abnormal value of the CO concentration is a numerical value that exceeds the upper limit of the set value, with reference to the preset set value of the CO concentration in the vehicle. The set value (abnormal value) is stored in the storage unit. 
     Here, the abnormal value includes a first abnormal value and a second abnormal value, which is an abnormal value at which the degree of danger to the living body that is present in the vehicle is higher than that of the first abnormal value. 
     The in-vehicle temperature of the first abnormal value changes depending on the country, region, ambient temperature, season, and the like, and may have a plurality of set values. The set value of the in-vehicle temperature is a value that can be changed. 
     The CO concentration of the first abnormal value is set with 100 ppm (parts per million) as the upper limit. The upper limit value of 100 ppm is a standard, and the CO concentration may be set to be lower than the upper limit value of 100 ppm. 
     The second abnormal value is a numerical value at which there is a high possibility that the living body that is present in the vehicle dies. For example, regarding the in-vehicle temperature, the upper limit value is set to 40° C. or higher and the lower limit value is set to 0° C. or lower. Regarding the CO concentration, the upper limit is set to 800 ppm. The set values are examples, and the upper limit value of the in-vehicle temperature may be set to 39° C. or lower and the lower limit value may be set to 3° C. or lower. Regarding the CO concentration, the upper limit may further be reduced to 700 ppm or lower or may be set to other concentrations. 
     In addition, the danger degree determination unit  41   a  determines whether or not the living body that is present in the vehicle is in a dangerous state on condition that a predetermined time has elapsed from the time point when it is detected that the living body is present in the vehicle by the living body sensor  32 . It is measured whether or not the predetermined time has elapsed by the timer  45 . 
     The alarm level setting unit  41   b  sets an alarm level based on the determination result of the danger degree determination unit  41   a . The alarm levels are divided into levels based on the danger degree, and preliminary alarms and formal alarms that correspond to each alarm level are prepared. 
     (Preliminary Alarm) 
     The preliminary alarm is an alarm toward the outside of the vehicle, and is an alarm to the degree that discomfort to the user  200  (driver) of the vehicle  50  outside the vehicle and a third party other than the user  200  around the vehicle  50  is not caused, and to the degree that the user  200  of the vehicle  50  outside the vehicle notices the alarm. The preliminary alarm is an alarm in a case where the danger degree of the infant who is present in the vehicle is lower than that of the formal alarm. The preliminary alarm is, for example, an alarm to the user  200  of the vehicle  50  outside the vehicle by the portable device buzzer of the user  200 , the flashing of the welcome lamp  17   a , or the like. 
     When receiving the response signal from the portable device  20  of the user  200  of the vehicle  50 , the control unit  1  stops outputting the preliminary alarm from the output device  17 . Further, when receiving a door unlock signal from the door opening/closing device  14 , the control unit  1  stops outputting the preliminary alarm by the output device  17 . Further, in a case where a predetermined time has elapsed from the start of the output of the alarm, the control unit  1  stops outputting the preliminary alarm by the output device  17 . It is measured whether or not the predetermined time has elapsed by the timer  45 . 
     (Formal Alarm) 
     The formal alarm is an alarm toward the outside of the vehicle, and is an alarm to the degree that the user  200  of the vehicle  50  outside the vehicle  50  or a third party who is in the vicinity of the vehicle  50  notices the alarm excellently. The degree that the user or the third party notices the alarm excellently is, for example, a sound volume or a light volume used for a generally known security alarm of the vehicle  50 . The formal alarm is an alarm in a case where the danger degree of the infant who is present in the vehicle is higher than that of the preliminary alarm. The formal alarms include the horn  17   b , the security siren, the flashing of the hazard lamp  17   d , the flashing of the winker lamp, or the flashing of the tail lamp of the vehicle. 
     When receiving the response signal from the portable device  20  of the user  200  of the vehicle  50 , the control unit  1  stops outputting the formal alarm to the output device  17 . Further, when receiving the door unlock signal from the door opening/closing device  14 , the control unit  1  stops outputting the formal alarm by the output device  17 . Further, as a stop condition of the formal alarm, reception of the signal of the “open” of the door by the control unit  41  may be added. As the stop condition of the formal alarm, an operation of a request switch (not illustrated) may be added. 
     The preliminary alarm may be an alarm toward the inside of the vehicle. The alarm toward the inside of the vehicle is an alarm to the degree that discomfort to the user  200  of the vehicle  50  in the vehicle is not caused, and to the degree that the user  200  notices the alarm. The alarm toward the inside of the vehicle is an alarm toward the outside of the vehicle or an alarm that the danger degree of the infant who is present in the vehicle is lower than that of the formal alarm. The alarm toward the inside of the vehicle outputs an alarm to the user  200  in the vehicle, for example, by an in-vehicle buzzer, flashing of the room lamp, a sound or screen display of a car navigation system, lighting of a warning lamp of an instrument panel, or the like. 
     The preliminary alarm may be an output of an alarm to a smart phone (portable terminal) held by the user  200  of the vehicle  50 . The alarm to the smartphone is an alarm in a case where the danger degree of the infant who is present in the vehicle is higher than that of the alarm toward the inside of the vehicle and the alarm toward the outside of the vehicle, and the danger degree of the infant who is present in the vehicle is lower than that of the formal alarm. The output of the alarm to the smartphone utilizes, for example, the vibration function, the utterance function, the ring tone function, the short message function, or the e-mail function of the smartphone. 
     The means for outputting the alarm to the smartphone is not limited to the above-described functions, and for example, a configuration may be adopted in which other functions of the smartphone or an application downloaded by the user  200  of the vehicle  50  are used. 
     Returning to  FIG. 2  again, the schematic configuration of the vehicle alarm control device will be described. 
     The alarm output determination unit  41   c  determines an alarm that corresponds to the alarm level set by the alarm level setting unit  41   b , that is, one of the preliminary alarm and the formal alarm. The alarm output determination unit  41   c  outputs the determined alarm from the output device  17 . 
     In a case where the alarm that corresponds to the alarm level set by the alarm level setting unit  41   h  is a preliminary alarm, the alarm is output to the user  200  by, for example, the portable device buzzer of the user  200  or the flashing of the welcome lamp  17   a . In a case where the alarm that corresponds to the alarm level set by the alarm level setting unit  41   b  is a formal alarm, the alarm is output to the user  200  or the third party in the vicinity of the vehicle  50 , for example, by the horn  17   b , the security siren, the flashing of the hazard lamp  17   d , the flashing of the winker lamp, the flashing of the tail lamp, or the like of the vehicle  50 . 
     The alarm output determination unit  41   c  may output an alarm to a smartphone owned by the user  200  of the vehicle  50 . The smartphone is a multi-function mobile phone having functions of a personal computer, a personal digital assistant (FDA, portable information terminal), and the like. In a case where an alarm is configured to be output to the smartphone, the smartphone includes an antenna and performs wireless communication with a communication control unit (not illustrated) of the vehicle alarm control device  30  via the antenna. 
     Although the smartphone is exemplified, the invention is not limited to the smartphone and may be a tablet terminal or a wristwatch-type wearable terminal. In other words, any portable terminal device having a function capable of performing wireless communication with the communication control unit may be used. The wireless communication may be performed by, for example, Bluetooth (registered trademark), but may be performed by wireless communication such as Wi-Fi (registered trademark). 
     The communication unit  42  performs communication with the communication unit  4  by, for example, CAN. 
     The vehicle door information input unit  43  sends a signal (open/close state signal) indicating the open/close state of the vehicle door to the control unit  41 . The open/close state signal is output by the vehicle door information input unit based on a signal (vehicle door open/close signal) received by the control unit  1  from a door open/close detecting unit (not illustrated). The vehicle door open/close signal is sent from the control unit  1  to the communication unit  42  via the communication unit  4 , and the vehicle door information input unit  43  receives the vehicle door open/close signal from the communication unit  42 . 
     The vehicle speed information input unit  44  sends a signal indicating the vehicle speed to the control unit  41 . A signal (vehicle speed signal) indicating the vehicle speed is output from the vehicle speed information input unit  44  based on the detection result of the vehicle speed received by the control unit  1  from the vehicle speed sensor  15 . The vehicle speed signal is sent from the control unit  1  to the communication unit  42  via the communication unit  4 , and the vehicle speed information input unit  44  receives the vehicle speed signal from the communication unit  42 . 
     The timer  45  is an internal clock of the vehicle alarm control device  30 . The tinier  45  counts the output time of the alarm output by the output device  17 . When the timer  45  receives a count start signal from the alarm output determination unit  41   c , the timer  45  counts the set time for stopping the alarm. 
     The storage unit  46  stores various information. The storage unit  46  mainly stores a numerical value of a general vital sign of an infant, a temperature within a normal range in a vehicle, and a CO (carbon monoxide) concentration (hereinafter, referred to as a “determination reference value”) within a range that does not pose a danger to the human body. The determination reference values need not be one, and a plurality of determination reference values may be stored based on various information such as season, age, sex, and the like. 
     The vehicle-mounted control device  10  and the vehicle alarm control device  30  are examples of the “vehicle control device” of one or more embodiments of invention. The vehicle-mounted control device  10  and the vehicle alarm control device  30  may be separate bodies as in the embodiment, or the vehicle control device of one or more embodiments of the invention may be configured by integrating both devices. 
     (Leaving Determination of Infant in Vehicle) 
     In the embodiment, the leaving of the infant in the vehicle is determined by the control unit  41  based on the detection result of the getting-off intention, the detection result of the getting-off operation, and the detection result of whether or not the infant is present in the vehicle. At the time of the determination, the control unit  41  performs determination by combining the detection result of the getting-off intention, the detection result of the getting-off operation, and the detection result of whether or not the infant is present in the vehicle. 
     (Getting-Off Intention) 
     Here, the presence of the getting-off intention can be detected, for example, because the IG is switched from “ON” to “OFF”. Specifically, when the control unit  1  receives the IG OFF signal from the start switch  12 , the control unit  1  sends the IG OFF signal to the communication unit  42  via the communication unit  4 . When receiving the IG OFF signal, the communication unit  42  sends the IG OFF signal to the control unit  41 , and when receiving the IG OFF signal, the control unit  41  determines that the getting-off intention of the user  200  of the vehicle  50  is present. 
     Further, the presence of the getting-off intention can be detected, for example, because the vehicle speed becomes “zero”. Specifically, when the control unit  1  receives a vehicle speed zero signal indicating that the vehicle speed is zero from the vehicle speed sensor  15 , the control unit  1  sends the vehicle speed zero signal to the communication unit  42  via the communication unit  4 . When receiving the vehicle speed zero signal, the communication unit  42  sends the vehicle speed zero signal to the vehicle speed information input unit  44 , and the vehicle speed information input unit  44  outputs the vehicle speed signal based on the vehicle speed zero signal and sends the vehicle speed signal to the control unit  41 . When receiving the vehicle speed signal, the control unit  41  determines that the vehicle speed of the vehicle  50  is zero. Based on the determination result, the control unit  41  determines that the getting-off intention of the user  200  of the vehicle  50  is present. 
     The presence of the getting-off intention is, for example, a case where the shift position becomes parking from a position other than parking. Specifically, when the control unit  1  receives a signal (parking signal) for detecting a shift change from the transmission  16  (shift lever) to parking, the control unit  1  sends the parking signal to the communication unit  42  via the communication unit  4 . When receiving the parking signal, the communication unit  42  sends the parking signal to the control unit  41 , and when receiving the parking signal, the control unit  41  determines that the getting-off intention of the user  200  of the vehicle  50  is present. 
     Incidentally, the presence or absence of the getting-off intention of the user  200  of the vehicle  50  may be determined by any one of the above-described getting-off intention or by a combination thereof. 
     (Getting-Off Operation) 
     Here, the getting-off operation is an operation in which the user  200  changes the door from the “closed” state to the “open” state. 
     Specifically, when the control unit  1  receives a signal of door opening/closing (door opening/closing signal) from the door open/close detecting unit (not illustrated), the control unit  1  sends the door opening/closing signal to the communication unit  42  via the communication unit  4 . When receiving the door opening/closing signal, the communication unit  42  sends the door opening/closing signal to the vehicle door information input unit  43 , and the vehicle door information input unit  43  outputs a signal indicating the open/close state to the control unit  41  based on the door opening/closing signal. In a case where the signal indicating the open/close state is a signal indicating “open” of the door, the control unit  41  determines that the getting-off operation of the user  200  of the vehicle  50  is “present”. 
     (Living Body Detection) 
     It is determined whether or not an infant is present in the vehicle by the control unit  41  based on the detection result acquired from the living body sensor  32 . Specifically, it is detected whether or not a living body is present in the vehicle by sensing in the vehicle by the living body sensor  32 , and regarding whether or not the detected living body is an infant, it is determined whether or not the detected living body is an infant by comparing the general biological information of the infant with the biological information detected by the living body sensor  32 . 
     Here, general biological information of the infant is stored in the storage unit  46 . At the time of the determination, the control unit  41  acquires the general biological information from the storage unit  46  and compares the acquired biological information with the biological information detected by the living body sensor  32 . 
     In a case where the living body sensor  32  does not detect the biological information in the vehicle, or in a case where the biological information detected by the living body sensor  32  does not match the general biological information of the infant as a result of comparing the biological information detected by the living body sensor  32  with the general biological information of the infant, the control unit  41  determines whether or not an infant is present in the vehicle based on the result of comparison between the biological information detected by the living body sensor  32  and the general biological information of the infant. In a case where the biological information is not detected by the living body sensor  32 , the control unit  41  determines that an infant is not present in the vehicle. 
     In the embodiment, a configuration for determining an infant is described, but the determination target is not limited to an infant and includes at least a living body that cannot avoid a crisis by the own intention thereof. 
     Next, the preliminary alarm and the formal alarm in the embodiment will be described with reference to the flowcharts of  FIGS. 3 to 6 . 
     (Preliminary Alarm) 
     The preliminary alarm is an alarm output prior to the formal alarm. 
     First, the control unit  41  determines the presence or absence of the getting-off intention of the user  200  of the vehicle  50  (S 1 ). Then, the control unit  41  determines the presence or absence of the getting-off operation of the user  200  of the vehicle  50  (S 1 ). 
     When it is determined that both the getting-off intention and the getting-off operation of the driver are “absent” (NO in S 1 ), the control unit  41  again determines the presence or absence of the getting-off intention and the getting-off operation of the driver (S 1 ). In addition, even in a case where it is determined that only one of the getting-off intention and the getting-off operation of the driver is “present” (NO in S 1 ), the control unit  41  again determines the presence or absence of the getting-off intention and the getting-off operation of the driver (S 1 ). 
     Meanwhile, when it is determined that the getting-off intention of the driver is “present” and it is determined that the getting-off operation of the driver is “present” (YES in S 1 ), the control unit  41  determines whether or not an infant is present in the vehicle (S 2 ). 
     When it is determined that an infant is not present in the vehicle, the control unit  41  stops the operation of the vehicle alarm control device  30  (NO in S 2 ), Meanwhile, when the control unit  41  determines that an infant is present in the vehicle (YES in S 2 ), the control unit  41  determines that the infant who is present in the vehicle is left behind, and causes the danger degree determination unit  41   a  to determine whether or not the infant who is present in the vehicle is in a dangerous state (S 3 ). 
     When the danger degree determination unit  41   a  determines that the infant who is present in the vehicle is not in a dangerous state (NO in S 3 ), the control unit  41  again determines whether or not the infant is present in the vehicle (S 2 ). Meanwhile, when the danger degree determination unit  41   a  determines that the infant who is present in the vehicle is in a dangerous state (YES in S 3 ), the determination result is sent to the control unit  1  via the communication unit  42  and the communication unit  4 , and the control unit  1  that has received the determination result causes the LF transmitting unit  2  to transmit the response request signal (S 4 ). When the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs authentication of the portable device  20  based on the ID code included in the response signal, and when the authentication is successful (NO in S 4 ), the control unit  1  sends the authentication result to the control unit  41  via the communication unit  4  and the communication unit  42 , in step S 22 , the control unit  41  that has received the authentication result again determines whether or not an infant is present in the vehicle (S 2 ). 
     Meanwhile, when the vehicle-mounted control device  10  cannot receive the response signal from the portable device  20  in response to the response request signal transmitted from the LF transmitting unit  2  (YES in S 4 ), the control unit  1  sends a signal indicating that the portable device cannot be detected to the control unit  41  via the communication unit  4  and the communication unit  42 . The control unit  41  that has received the signal sends the determination result by the danger degree determination unit  41   a  to the alarm level setting unit  41   b , and the alarm level setting unit  41   b  that has received the determination result sets the alarm level to “preliminary alarm” based on the determination result, and sends the setting signal to the alarm output determination unit  41   c.    
     The alarm output determination unit  41   c  that has received the setting signal from the alarm level setting unit  41   b  sends an output instruction of “preliminary alarm” to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the output instruction causes the output device  17  to output an alarm (S 5 ). 
     When the output device  17  outputs the preliminary alarm, the control unit  1  causes the LF transmitting unit  2  to transmit the response request signal (S 6 ). When the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs the authentication of the portable device  20  based on the ID code included in the response signal, and when the authentication is successful (YES in S 6 ), the control unit  1  causes the output device  17  to stop the output of the preliminary alarm (S 7 ). The control unit  1  determines the presence or absence of the door unlock signal from the door opening/closing device  14  (S 6 ). When receiving the door unlock signal (YES in S 6 ), the control unit  1  causes the output device  17  to stop the output of the preliminary alarm (S 7 ). 
     Meanwhile, in the control unit  1 , in a case where the vehicle-mounted control device  10  does not receive the response signal from the portable device  20  (NO in S 6 ), a detection disable signal of the portable device  20  is sent to the control unit  41  via the communication unit  4  and the communication unit  42 . 
     When receiving the signal, the control unit  41  determines whether or not a predetermined time has elapsed from the output start time point of the preliminary alarm (S 9 ). 
     Further, in a case where the door unlock signal is not received (NO in S 6 ), the control unit  1  sends an unreceived signal of the door unlock signal to the control unit  41  via the communication unit  4  and the communication unit  42 . 
     When receiving the signal, the control unit  41  determines whether or not a predetermined time has elapsed from the output start time point of the preliminary alarm (S 9 ). 
     It is determined whether or not the predetermined time has elapsed based on the information from the timer  45 . The timer  45  measures a predetermined time by using the start of the preliminary alarm as a trigger. When the control unit  41  determines that the predetermined time has elapsed based on the information from the timer  45  (YES in S 9 ), a time elapse signal indicating that the predetermined time has elapsed is sent to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the signal causes the output device  17  to stop the output of the preliminary alarm (S 10 ), and shifts to the formal alarm. 
     Meanwhile, in a case where the control unit  41  determines that the predetermined time has not elapsed based on the information from the timer  45  (NO in S 9 ), the control unit  41  sends the time elapse signal indicating that the predetermined time has not elapsed to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the signal again causes the LF transmitting unit  2  to transmit the response request signal (S 6 ), or the control unit  1  determines the presence or absence of the door unlock signal from the door opening/closing device  14  (S 6 ). 
     In addition, in S 4  of the above-described flowchart, in a case where the vehicle-mounted control device  10  cannot receive the response signal from the portable device  20  in response to the response request signal transmitted from the LF transmitting unit  2  (YES in S 4 ), the control unit  1  causes the output device  17  to output the preliminary alarm, but the control unit  1  may postpone the output instruction of the preliminary alarm until a predetermined time elapses from the time point when it is determined that the response signal from the portable device  20  cannot be received. In a case where the control unit  1  is configured to postpone the output instruction of the preliminary alarm, the control unit  1  determines whether or not a predetermined time has elapsed based on the information from the timer  45 . 
     (Formal Alarm) 
     Next, the formal alarm in the embodiment will be described with reference to the flowchart of  FIG. 4 . Since S 21  and S 22  in  FIG. 4  correspond to S 1  and S 2  in  FIG. 3 , respectively, the description thereof will be omitted. 
     Here, the “polling output condition” illustrated in S 23  of  FIG. 4  is the same as the condition for the danger degree determination unit  41   a  to determine the danger degree. In other words, the polling output condition determines whether or not to start the polling output based on whether or not the living body that is present in the vehicle is in a dangerous state. 
     The polling output transmits a response request signal to the portable device  20  of the user  200  of the vehicle  50 . Specifically, the polling output condition satisfies the polling output condition when the living body that is present in the vehicle is in a dangerous state based on the information acquired from each of the living body sensor  32 , the temperature sensor  31 , and the CO sensor  33 , the locking/unlocking information acquired by the control unit  1  from the vehicle  50 , and the information acquired from the timer  45 . Meanwhile, in a case where the living body that is present in the vehicle is not in a dangerous state, the polling output condition is not satisfied. 
     In a case where the polling output condition is not satisfied (NO in S 23 ), the control unit  41  again determines whether or not an infant is present in the vehicle (S 22 ). Meanwhile, in a case where the polling output condition is satisfied (YES in S 23 ), the control unit  1  causes the LF transmitting unit  2  to transmit the response request signal (S 24 ). When the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs authentication of the portable device  20  based on the ID code included in the response signal, and when the authentication is successful (NO in S 24 ), the control unit  1  stops the polling output and sends the authentication result to the control unit  41  via the communication unit  4  and the communication unit  42 . The control unit  41  that has received the authentication result again determines whether or not an infant is present in the vehicle (S 22 ). 
     Meanwhile, when the vehicle-mounted control device  10  cannot receive the response signal from the portable device  20  in response to the response request signal transmitted from the LF transmitting unit  2  (YES in S 24 ), the control unit  1  stops the polling output and sends a signal indicating that the portable device cannot be detected to the control unit  41  via the communication unit  4  and the communication unit  42 . The control unit  41  that has received the signal sends the determination result by the danger degree determination unit  41   a  to the alarm level setting unit  41   b , and the alarm level setting unit  41   h  that has received the determination result sets the alarm level to “formal alarm” based on the determination result, and sends the setting signal to the alarm output determination unit  41   c.    
     The alarm output determination unit  41   c  that has received the setting signal from the alarm level setting unit  41   h  sends an output instruction of “formal alarm” to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the output instruction causes the output device  17  to output an alarm (S 25 ). 
     After outputting the formal alarm, the control unit  1  determines whether or not the polling output condition is satisfied (S 26 ) After outputting the formal alarm, when it is determined that the polling output condition is not satisfied (NO in S 26 ), the control unit  1  again determines whether or not the polling output condition is satisfied (S 26 ). Meanwhile, after outputting the formal alarm, when it is determined that the polling output condition is satisfied (YES in S 26 ), the control unit  1  causes the LF transmitting unit  2  to transmit the response request signal (S 27 ). When the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs the authentication of the portable device  20  based on the ID code included in the response signal, and when the authentication is successful (YES in S 27 ), the control unit  1  stops the polling output and causes the output device  17  to stop the output of the formal alarm (S 28 ). The control unit  1  determines the presence or absence of the door unlock signal from the door opening/closing device  14  (S 27 ). When the control unit  1  receives the door unlock signal (YES in S 27 ), the control unit  1  stops the polling output and causes the output device  17  to stop the output of the formal alarm (S 28 ). 
     Since S 29  corresponds to S 8  in  FIG. 3 , the description thereof will be omitted. 
     In addition, in S 24  of the above-described flowchart, in a case where the vehicle-mounted control device  10  cannot receive the response signal from the portable device  20  in response to the response request signal transmitted from the LF transmitting unit  2  (YES in S 24 ), the control unit  1  causes the output device  17  to output the formal alarm, but the control unit  1  may postpone the output instruction of the formal alarm until a predetermined time elapses from the time point when it is determined that the response signal from the portable device  20  cannot be received. In a case where the control unit  1  is configured to postpone the output instruction of the formal alarm, the control unit  1  determines whether or not a predetermined time has elapsed based on the information from the tinier  45 . 
     In addition, in the above-described flowchart S 27 , when the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs authentication of the portable device  20  based on the ID code included in the response signal, and after the authentication is successful (YES in S 27 ) or after the door unlock signal is received (YES in S 27 ), a condition in which the control unit  41  receives the signal indicating “open” of the door may further be the stop condition of the formal alarm. 
     In addition, in the above-described flowchart S 27 , when the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 , When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs authentication of the portable device  20  based on the ID code included in the response signal, and after the authentication is successful (YES in S 27 ) or after the door unlock signal is received (YES in S 27 ), an ON operation of a request switch (not illustrated) may further be the stop condition of the formal alarm. 
     In addition, in a case of a situation where the preliminary alarm and the formal alarm are switched to each other in this order, the overlapping steps may be omitted. 
     Embodiment 2 
     Another embodiment of the invention will be described below. For convenience of description, members having the same functions as those described in the above-described embodiment will be given the same reference numerals, and the description thereof will not be repeated. 
     (Preliminary Alarm) 
     In the embodiment, the preliminary alarm is different from the preliminary alarm in Embodiment 1 in that the kidnapping alarm is included. 
     Hereinafter, the description will be made with reference to the flowchart of  FIG. 5 . 
     Since S 31  to S 38  in  FIG. 5  correspond to S 1  to S 8  in  FIG. 3 , respectively, the description thereof will be omitted. 
     After the control unit  41  determines that an infant is present in the vehicle (YES in S 32 ), the danger degree determination unit  41   a  determines whether or not an infant who is present in the vehicle is in a dangerous state (S 33 ), and the presence or absence of a kidnapping operation is also determined (S 51 ). In the embodiment, the “kidnapping operation” means that the door of the vehicle  50  is opened, and the control unit  41  determines that the door is “open” by receiving a signal indicating “open” of the door from the vehicle door information input unit. 
     When it is determined that the kidnapping operation is “absent” (NO in S 51 ), the control unit  41  again determines the presence or absence of the kidnapping operation (S 51 ). Meanwhile, when the control unit  41  determines that the kidnapping operation is “present” (YES in S 51 ), the determination result is sent to the control unit  1  via the communication unit  42  and the communication unit  4 , and when receiving the determination result, the control unit  1  causes the LF transmitting unit  2  to transmit the response request signal (S 52 ). When the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs authentication of the portable device  20  based on the ID code included in the response signal, and when the authentication is successful (NO in S 52 ), the signal indicating that the detection of the portable device  20  is sent to the control unit  41  via the communication unit  4  and the communication unit  42 . The control unit  41  that has received the signal again determines the presence or absence of the kidnapping operation (S 51 ). 
     Meanwhile, in a case where the vehicle-mounted control device  10  does not receive the response signal from the portable device  20  (YES in S 52 ), the control unit  1  determines that a third party other than the user  200  of the vehicle  50  has opened the door of the vehicle  50 , and causes the output device  17  to output the kidnapping alarm (S 53 ). 
     When the output device  17  outputs the kidnapping alarm, the control unit  1  causes the LF transmitting unit  2  to transmit the response request signal (S 54 ). When the portable device  20  of the user  200  of the vehicle  50  receives the response request signal transmitted from the LF transmitting unit  2 , the portable device  20  returns the response signal to the vehicle-mounted control device  10 . When the vehicle-mounted control device  10  receives the response signal from the portable device  20 , the control unit  1  performs the authentication of the portable device  20  based on the ID code included in the response signal, and when the authentication is successful (YES in S 54 ), the control unit  1  causes the output device  17  to stop the output of the kidnapping alarm (S 56 ). The control unit  1  determines the presence or absence of the door unlock signal from the door opening/closing device  14  (S 54 ). When receiving the door unlock signal (YES in S 54 ), the control unit  1  causes the output device  17  to stop the output of the kidnapping alarm (S 56 ). 
     After the output of the kidnapping alarm is stopped (S 56 ), the process proceeds to step S 38 . 
     Meanwhile, in a case where the vehicle-mounted control device  10  does not receive the response signal from the portable device  20  (NO in S 54 ), the control unit  1  sends a detection disable signal of the portable device  20  to the control unit  41  via the communication unit  4  and the communication unit  42 . 
     When receiving the signal, the control unit  41  determines whether or not a predetermined time has elapsed from the output start time point of the preliminary alarm (S 55 ). 
     Further, in a case where the control unit  1  does not receive the door unlock signal (NO in S 54 ), an unreceived signal of the door unlock signal is sent to the control unit  41  via the communication unit  4  and the communication unit  42 . 
     When receiving the signal, the control unit  41  determines whether or not a predetermined time has elapsed from the output start time point of the preliminary alarm (S 55 ). 
     It is determined whether or not the predetermined time has elapsed based on the information from the timer  45 . The timer  45  measures a predetermined time by using the start of the kidnapping alarm as a trigger. When it is determined that the predetermined time has elapsed based on the information from the timer  45  (YES in S 55 ), the control unit  41  sends a time elapse signal indicating that the predetermined time has elapsed to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the signal causes the output device  17  to stop the output of the kidnapping alarm (S 56 ). After the output of the kidnapping alarm is stopped (S 56 ), the process proceeds to step S 38 . 
     Meanwhile, in a case where the control unit  41  determines that the predetermined time has not elapsed based on the information from the timer  45  (NO in S 55 ), the control unit  41  sends the time elapse signal indicating that the predetermined time has not elapsed to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the signal again causes the LF transmitting unit  2  to transmit the response request signal (S 54 ), or the control unit  1  determines the presence or absence of the door unlock signal from the door opening/closing device  14  (S 54 ). 
     Next, the flowchart from the step S 36  of  FIG. 5  to the step of outputting the kidnapping alarm will be described. 
     In step S 36 , in a case where the vehicle-mounted control device  10  does not receive the response signal from the portable device  20  (NO in S 36 ), the control unit  1  sends a detection disable signal of the portable device  20  to the control unit  41  via the communication unit  4  and the communication unit  42 . When receiving the signal, the control unit  41  determines the presence or absence of the kidnapping operation (S 39 ). 
     Further, in a case where the door unlock signal is not received (NO in S 36 ), the control unit  1  sends an unreceived signal of the door unlock signal to the control unit  41  via, the communication unit  4  and the communication unit  42 . When receiving the signal, the control unit  41  determines the presence or absence of the kidnapping operation (S 39 ). 
     When it is determined that the kidnapping operation is “present” (YES in S 39 ), the control unit  41  sends the determination result to the control unit  1  via the communication unit  42  and the communication unit  4 , The control unit  1  that has received the determination result causes the output device  17  to output the kidnapping alarm Since the steps after S 53  are the same as those described above, the description thereof will be omitted here. 
     Meanwhile, when the control unit  41  determines that the kidnapping operation is “absent” (NO in S 39 ), it is determined whether or not a predetermined time has elapsed from the output start time point of the preliminary alarm (S 40 ). It is determined whether or not the predetermined time has elapsed based on the information from the timer  45 . The timer  45  measures a predetermined time by using the start of the preliminary alarm as a trigger. 
     When the control unit  41  determines that the predetermined time has elapsed based on the information from the timer  45  (YES in S 40 ), a time elapse signal indicating that the predetermined time has elapsed is sent to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the signal causes the output device  17  to stop the output of the preliminary alarm (S 41 ), and shills to the formal alarm. 
     Meanwhile, in a case where the control unit  41  determines that the predetermined time has not elapsed based on the information from the timer  45  (NO in S 40 ), the control unit  41  sends the time elapse signal indicating that the predetermined time has not elapsed to the control unit  1  via the communication unit  42  and the communication unit  4 . The control unit  1  that has received the signal again causes the LF transmitting unit  2  to transmit the response request signal (S 36 ), or the control unit  1  determines the presence or absence of the door unlock signal from the door opening closing device  14  (S 36 ). 
     (Formal Alarm) 
     The formal alarm is different from the formal alarm in Embodiment 1 in that the kidnapping alarm is included. 
     Hereinafter, the description will be made with reference to the flowchart of  FIG. 6 . 
     Since S 61  to S 69  in  FIG. 6  correspond to S 21  to S 29  in  FIG. 4 , respectively, the description thereof will be omitted. 
     After determining that an infant is present in the vehicle (YES in S 62 ) until determining whether or not the polling output condition is satisfied (S 63 ), the control unit  41  determines the presence or absence of the kidnapping operation (S 71 ). Since the steps after S 71  correspond to the steps after S 51  in  FIG. 5 , the description thereof will be omitted. 
     Implementation Example by Software 
     The control blocks of the vehicle alarm control device  30  (in particular, the danger degree determination unit  41   a , the alarm level setting unit  41   b , and the alarm output determination unit  41   c ) may be realized by a logic circuit (hardware) formed on an integrated circuit (IC chip) or the like, or may be realized by software. 
     In the latter case, the vehicle alarm control device  30  includes a computer which executes commands of a program which is software for realizing each function. The computer includes, for example, one or more processors and a computer-readable recording medium in which the program is stored. In the computer, the object of the invention is achieved by reading and executing the program from the recording medium by the processor. The processor may be, for example, a central processing unit (CPU). As the recording medium, tapes, disks, cards, semiconductor memories, programmable logic circuits, and the like can be used in addition to a “non-transitory tangible medium”, for example, a read only memory (ROM) and the like. In addition, a random access memory (RAM) or the like for expanding the programs may further be provided. The program may be supplied to the computer via any transmission medium (communication network or a broadcast wave) capable of transmitting the program. In addition, one or more embodiments of the invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission. 
     SUMMARY 
     According to Aspect 1 of the invention, there is provided a vehicle control device that performs predetermined control on a vehicle by communicating with the portable device  20  held by the user  200 , the vehicle control device including: the living body sensor  32  that detects whether or not the living body is present in the vehicle by acquiring the biological information of the living body; the output device  17  that outputs an alarm; and the alarm output determination unit  41   c  that determines the alarm to be output by the output device  17  by detecting the presence of the living body in the vehicle by the living body sensor  32  and satisfying a predetermined condition for outputting the alarm, wherein when the portable device  20  and the vehicle control device communicate with each other after the alarm is Output by the output device  17 , the output device  17  stops outputting the alarm. 
     According to the above-described configuration, after detecting whether or not the living body is present in the vehicle, the vehicle control device can output an alarm from the output device  17  by satisfying a predetermined condition. When the portable device  20  and the vehicle control device communicate with each other after the alarm is output by the output device  17 , the output device  17  stops outputting the alarm. Accordingly, the user  200  of the vehicle  50  can stop the output of the alarm without performing a troublesome operation after the output of the alarm. 
     In the vehicle control device according to Aspect 2 of the invention, in the Aspect 1, the vehicle control device may further include the first transmitting unit configured to transmit a response request signal to the portable device; and the first receiving unit configured to receive a response signal from the portable device, the portable device may include the second receiving unit configured to receive the response request signal from the vehicle control device; and the second transmitting unit configured to transmit the response signal to the vehicle control device, and, when the second receiving unit receives the response request signal transmitted from the first transmitting unit, the response signal may be transmitted from the second transmitting unit to the first receiving unit, and when the second receiving unit receives the response signal, the output device may stop outputting the alarm. 
     According to the above-described configuration, since the output of the alarm can be stopped when the user  200  who holds the portable device  20  returns to the vicinity of the vehicle  50 , it is possible to prevent in advance the problem that the alarm cannot be stopped until the actual rescue operation (for example, opening the door) is performed after the alarm is output and causes a trouble to the surroundings. 
     In the vehicle control device according to Aspect 3 of the invention, in the Aspect 1, the vehicle control device may further include: the first receiving unit configured to receive a remote operation signal from the portable device  20 , the portable device may include a second transmitting unit configured to transmit the remote operation signal to the vehicle control device, and when the remote operation signal transmitted from the second transmitting unit is received by the first receiving unit, the output device may stop outputting of the alarm. 
     According to the above-described configuration, the user  200  can stop the output of the alarm by transmitting the remote operation signal from the portable device  20 . Accordingly; it is possible to prevent in advance the problem that the alarm cannot be stopped until the actual rescue operation (for example, opening the door) is performed after the alarm is output and causes a trouble to the surroundings. 
     In the vehicle control device according to Aspect 4 of the invention, in the Aspect 2, the response request signal to be transmitted from the first transmitting unit may be transmitted after the alarm is output by the output device  17 . 
     According to the above-described configuration, it becomes possible to set the timing of transmitting the response request signal after the output of the alarm. Accordingly, it is possible to suppress battery consumption due to transmission of the response request signal. 
     In the vehicle control device according to Aspect 5 of the invention, in the Aspect 1, the vehicle control device may further include: the temperature sensor  31  that detects the temperature in the vehicle; and the CO sensor  33  that detects the carbon monoxide concentration in the vehicle, and the predetermined conditions may include at least one of conditions that: the getting-off intention and/or the getting-off operation of the driver is detected; a numerical value detected by the temperature sensor  31  and/or the CO sensor  33  indicates an abnormal value; a vital sign of the living body detected by the living body sensor  32  indicates an abnormal value; and a predetermined time elapses from a time point at which the presence of the living body in the vehicle is detected by the living body sensor  32 . 
     According to the above-described configuration, it is possible to output an alarm by satisfying at least one condition among detecting the getting-off intention and/or the getting-off operation of the driver, indicating an abnormal value as a numerical value detected by the temperature sensor  31  and/or the CO sensor  33 , indicating an abnormal value as a vital sign of the living body detected by the living body sensor  32 , and elapse of a predetermined time from a time point at which the presence of the living body in the vehicle is detected by the living body sensor  32 , or by satisfying a condition in which the plurality of the above-described conditions are combined with each other. Accordingly, it is possible to output an alarm in accordance with the in-vehicle environment and the state of the infant left behind in the vehicle. 
     In the vehicle control device according to Aspect 6 of the invention, in the Aspect 5, the alarm output determination unit  41   c  may be configured: to determine the preliminary alarm as an alarm to be output by the output device  17  in a case where the numerical value detected by the temperature sensor  31  and/or the CO sensor  33  indicates the first abnormal value; and to determine the formal alarm as an alarm to be output by the output device  17  in a case where the numerical value detected by the temperature sensor  31  and/or the CO sensor  33  indicates the second abnormal value having a higher degree of danger to the living body than that of the first abnormal value. 
     According to the above-described configuration, in a case where the numerical value detected by the temperature sensor  31  and/or the CO sensor  33  indicates the second abnormal value having a higher degree of danger to an infant in the vehicle than that of the first abnormal value, it is possible to output the formal alarm that is more easily noticeable to the user  200  of the vehicle  50  and a third part other than the user of the vehicle  50  in the vicinity of the vehicle  50  than the preliminary alarm. 
     In the vehicle control device according to Aspect 7 of the invention, in the Aspect 2 or 4, the vehicle control device may further include: the vehicle door information input unit to which the information on opening and closing of the door of the vehicle is input, and the vehicle control device may transmit the response request signal from the first transmitting unit to the portable device when the door opening signal is input to the vehicle door information input unit, and the alarm output determination unit may be configured: to determine that the alarm to be output by the output device is a kidnapping alarm when the response signal transmitted from the portable device is not received by the first receiving unit; and not to determine that the alarm to be output by the output device is the kidnapping alarm when the response signal transmitted from the portable device is received by the first receiving unit. 
     According to the above-described configuration, in a case where the user  200  of the vehicle  50  who has the portable device  20  opens the door of the vehicle  50 , an alarm is not output, and on the other hand, when the door of the vehicle  50  is opened by a person who does not have the portable device  20  (a person other than the user  200  of the vehicle  50 ), an alarm can be output. Accordingly, in a case where the door is opened by a person other than the user  200  of the vehicle  50  who does not have the portable device  20 , it is possible to output the kidnapping alarm on the assumption that the infant in the vehicle is kidnapped. 
     In the vehicle control device according to Aspect 8 of the invention, in any one of Aspects 1 to 7, the living body sensor  32  may detect the biological information by irradiating the living body with a radio wave and receiving a reflected wave from the living body. 
     According to the above-described configuration, it is possible to detect the presence of the living body in the vehicle interior based on the biological information detected using the radio wave. 
     Additional Notes 
     The invention is not limited to the above-described embodiments, and various changes can be made within the scope illustrated in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the invention.