Patent Publication Number: US-2023150487-A1

Title: Vehicle passenger accident prevention system and control method for the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0158670, filed in the Korean Intellectual Property Office on Nov. 17, 2021, the entire contents of which are incorporated herein by reference. 
     BACKGROUND 
     (a) Field 
     The present disclosure relates to a vehicle passenger accident prevention system and a method for the same. In more detail, a vehicle passenger accident prevention system for preventing an accident of a passenger seated inside the vehicle when the forward collision avoidance assist system is operated and method for the same. 
     (b) Description of the Related Art 
     A forward collision avoidance assist system (FCA), also called automatic emergency braking, is an evolutionary system from forward collision warning. The forward collision avoidance assist system detects a collision situation with a vehicle or pedestrian in front in advance, calculates the time until collision with a vehicle or pedestrian in front, sends a warning sound to the driver, and controls vehicle braking. 
     However, when the forward collision avoidance assist system applied to a multi-use vehicle operates, a number of safety accidents for passengers may occur. In particular, in the case of a commercial bus, there may be a passenger on a standing, a passenger may move while the vehicle is moving, or there may be a case where the passenger stands up to get off before the bus arrives at its destination. At this time, when a sudden stop is made by the forward collision avoidance assist system, there are cases in which passengers are injured. In particular, in the case of a double-decker bus, the forward collision avoidance assist system operates while the passenger is moving from the second floor to the first floor, and there is a possibility of a fall accident. 
     The above information disclosed in this Background section is provided only to enhance understanding of the background of the present disclosure. Therefore, it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. 
     SUMMARY 
     The present disclosure has been made in an effort to provide a vehicle passenger accident prevention system and a method for the same operating a forward collision avoidance assist system in advance in consideration of the passenger&#39;s seating state, etc. 
     A vehicle passenger accident prevention system according to an embodiment of the present disclosure may include a vehicle operation status measurement unit that measures operation states of a vehicle and outputs corresponding signals, a driving unit to drive the vehicle, a braking unit to brake the vehicle, a FCA system that controls the operation of the driving unit and the braking unit, and a controller that detects the seated state of a passenger in the vehicle or a wearing state of a seat belt according to the output signal of the vehicle operation status measurement unit. In particular, the controller controls the operation of the FCA system according to a predetermined control mode in advance when a standing passenger in the vehicle is detected or an unbuckled seat belt is detected. 
     The vehicle operation status measurement unit may include: a passenger count sensor which detects the passenger when the passenger enters or leaves the vehicle and outputs the corresponding output signal, a sitting detecting sensor that determines whether a passenger is seated in the seat and outputs the corresponding signal, and a belt wearing detecting sensor that detects whether a seat belt is buckled and outputs the corresponding signal. 
     The controller may determine the seated state of a passenger in the vehicle by subtracting the number of seated passengers detected by the sitting detecting sensor from the number of passenger occupants detected by the passenger count sensor. The controller may determine the wearing state of the seat belt of the corresponding seat according to output signals of the sitting detecting sensor and the belt wearing detecting sensor. 
     The vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include a display system that displays the seating status of the passenger in the vehicle or the wearing status of the seat belt of the seat. 
     The display system may display the operating state of the FCA system. 
     The vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include a voice guidance system for warning the wearing state of the seat belt of the seat or the seated state of the passenger in the vehicle. 
     The vehicle operation status measurement unit may further include: a vehicle speed sensor that measures the vehicle speed and outputs the corresponding signal, a distance sensor that measures a distance to the vehicle in front and outputs the corresponding signal, and an optical camera that captures surrounding images of the vehicle and outputs the corresponding signals. The controller may determine whether the operation condition of the FCA system is satisfied according to the output signals of the vehicle speed sensor, the distance sensor and the optical camera. 
     The control mode may include an FCA system preemptive operation mode to operate the FCA system in advance it is determined that there is a standing passenger in the vehicle or there is an unbuckled seat belt according to the output signal of the vehicle operation status measurement unit. 
     The control mode may further include an FCA system normal mode to operate the FCA system normally when it is determined that an operation condition of the FCA system is satisfied according to the output signal of the vehicle operation status measurement unit and it is determined that there is no standing passenger in the vehicle and there is no unbuckled seat belt according to the output signal of the vehicle operation status measurement unit. The unbuckled seat belt indicates an unbuckled passenger in the vehicle. 
     In the FCA system preemptive operation mode, the controller may operate the FCA system by applying a predetermined preemptive collision duration that is increased more than a predetermined collision duration in the FCA system normal mode. 
     In the FCA system preemptive operation mode, the controller may operate the FCA system by applying a predetermined preemptive vehicle deceleration rate that is further reduced than a predetermined vehicle deceleration rate in the FCA system normal mode. 
     The vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include an advanced smart cruise control (ASCC) system including a function of maintaining an inter-vehicle distance with the front vehicle. The control mode may further include an inter-vehicle distance preemptive operation mode to operate the ASCC system in advance before the operation of the FCA system when it is determined to correspond to the operation condition of the FCA system according to the output signal of the vehicle operation status measurement unit, it is determined that there is a standing passenger in the vehicle or there is an unbuckled seat belt according to the output signal of the vehicle operation status measurement unit, and it is determined to correspond to a predetermined inter-vehicle distance preemptive operation condition according to the output signal of the vehicle operation status measurement unit. 
     The controller may calculate the collision duration according to the signals output from the vehicle speed sensor and the distance sensor, and if the calculated collision duration is longer than the predetermined collision duration, the controller may determine that the vehicle-to-vehicle distance preemptive operation mode is applicable. 
     In the inter-vehicle distance preemptive operation mode, the controller may operate the ASCC system by applying a predetermined inter-vehicle distance longer than the predetermined inter-vehicle distance in the FCA system normal mode. 
     The vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include an ASCC system including a function of maintaining an inter-vehicle distance with the front vehicle 
     The control mode may further include an environment preemptive operation mode to operate the ASCC system in advance before the operation of the FCA system when it is determined to correspond to the operation condition of the FCA system according to the output signal of the vehicle operation status measurement unit, it is determined that there is a standing passenger in the vehicle or there is an buckled seat belt according to the output signal of the vehicle operation status measurement unit, and it is determined to correspond to a predetermined environmental preemptive operation condition according to the output signal of the vehicle operation status measurement unit. 
     The vehicle operation status measurement unit may further include an outside temperature sensor that measures the outside temperature and outputs the corresponding signal, a rain sensor detecting rain, snow, etc. and outputting a corresponding signal, and a blind spot detection (BSD) system that detects the presence of objects around the vehicle and outputs the corresponding signal. The controller may determine whether it corresponds to the environment preemptive operation mode according to the output signal of the outside temperature sensor, the rain sensor or the BSD system. 
     The controller may control the operation of the ASCC system to reduce the vehicle speed to a predetermined speed if it is determined that the controller corresponds to the environment preemptive operation mode. 
     A control method according to an embodiment of the present disclosure may be applied to a vehicle passenger accident prevention system including a vehicle operation status measurement unit having a passenger count sensor which detects the passenger when the passenger enters or leaves the vehicle and outputs the corresponding output signal. The vehicle operation status measurement unit further includes: a sitting detecting sensor to detect whether a passenger is seated in the seat and output the corresponding signal, a belt wearing detecting sensor that detects whether a seat belt is buckled and outputs the corresponding signal, a vehicle speed sensor that measures the vehicle speed and outputs the corresponding signal, a distance sensor that measures the distance to the vehicle in front and outputs the corresponding signal, and an optical camera that captures surrounding images of the vehicle and outputs the corresponding signal. The vehicle passenger accident prevention system further includes: a driving unit to drive the vehicle, a braking unit to brake the vehicle, a FCA system that controls the operation of the driving unit and the braking unit, and a controller that detects the seated state of a passenger in the vehicle or a wearing state of a seat belt according to the output signal of the vehicle operation status measurement unit. In particular, the controller controls the operation of the FCA system according to a predetermined control mode in advance when a standing passenger in the vehicle is detected or an unbuckled seat belt is detected. In another embodiment, the control method may include: determining, by the controller, the seated state of a passenger in the vehicle by subtracting the number of seated passengers detected by the sitting detecting sensor from the number of passenger occupants detected by the passenger count sensor; determining, by the controller, the wearing state of the seat belt of the corresponding seat according to output signals of the sitting detecting sensor and the belt wearing detecting sensor; and determining, by the controller, whether the FCA system is in the operation condition based on whether a collision is expected according to the output signals from the vehicle speed sensor, the distance sensor and the optical camera. The control method may further include: performing, by the controller, an FCA system normal mode to operate the FCA system normally if the controller determines that the FCA system is in the operation condition of and there is no standing passenger in the vehicle, and there is no unbuckled seat belt; and performing, by the controller, an FCA system preemptive operation mode by applying a predetermined preemptive collision duration that is increased more than a predetermined collision duration in the FCA system normal mode and applying a predetermined preemptive vehicle deceleration rate that is further reduced than a predetermined vehicle deceleration rate in the FCA system normal mode if it is determined that the operation condition of the FCA system is satisfied, and it is determined that there is a standing passenger in the vehicle or there is an unbuckled seat belt. The vehicle passenger accident prevention system may further include an ASCC system having a function of maintaining an inter-vehicle distance with the front vehicle. The control method may further include performing, by the controller, an inter-vehicle distance preemptive operation mode to operate the ASCC system in advance before the operation of the FCA system when it is determined to correspond to the operation condition of the FCA system according to the output signal of the vehicle operation status measurement unit, it is determined that there is a standing passenger in the vehicle or there is an unbuckled seat belt according to the output signal of the vehicle operation status measurement unit, and it is determined to correspond to a predetermined inter-vehicle distance preemptive operation condition according to the output signal of the vehicle operation status measurement unit. 
     The vehicle operation status measurement unit may further include: an outside temperature sensor that measures the outside temperature and outputs the corresponding signal; a rain sensor detecting rain, snow, etc. and outputting a corresponding signal; and a BSD system that detects the presence of objects around the vehicle and outputs the corresponding signal. The control method may further include performing, by the controller, an environment preemptive operation mode to operate the ASCC system in advance before the operation of the FCA system if the controller corresponds to the predetermined environmental preemptive operation mode according to the output signal of the outside temperature sensor, the rain sensor or the BSD system. 
     The control method may further include controlling, by the controller, the operation of the driving unit and the braking unit to prohibit the departure of the vehicle when the controller determines that there is a standing passenger in the vehicle or there is an unbuckled seat belt before departure of the vehicle. 
     Through the means of solving the above problems, the vehicle passenger accident prevention system and the method according to the present disclosure may secure a safe distance with other vehicles by limiting the amount of acceleration of the vehicle when there is a standing passenger on the vehicle. 
     During driving, a vehicle speed and a vehicle deceleration rate may be reduced compared to a normal operation according to the additional function operation of the forward collision avoidance assist system. 
     Accordingly, it is possible to comprehensively prevent safety accidents for standing passengers. 
     In addition, for the effects that can be obtained or predicted due to an embodiment of the present disclosure, it is to be disclosed directly or implicitly in the detailed description of the embodiment of the present disclosure. Various effects predicted according to the embodiment of the present disclosure should be disclosed within a detailed description described below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a block diagram showing a configuration of a vehicle passenger accident prevention system according to an embodiment of the present disclosure. 
         FIG.  2    is a drawing showing a display system that may be applied to a vehicle passenger accident prevention system according to an embodiment of the present disclosure. 
         FIG.  3    and  FIG.  4    are flowcharts showing a control method of a vehicle passenger accident prevention system according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure is described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the present disclosure are shown. 
     As those having ordinary skill in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present disclosure. 
     The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the present disclosure. 
     As used herein, singular forms are intended to also include a plurality of forms, unless the context clearly indicates otherwise. When a component, device, element, or the like of the present disclosure is described as having a purpose or performing an operation, function, or the like, the component, device, or element should be considered herein as being “configured to” meet that purpose or to perform that operation or function. 
     In order to clearly describe the present disclosure, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification. 
     Since the size and thickness of each component shown in the drawing are arbitrarily indicated for convenience of explanation, the present disclosure is not necessarily limited to that shown in the drawing, and the thickness is enlarged to clearly express various parts and areas. 
     In addition, in the detailed description below, the reason that the names of the components are divided into first, second, etc. is to classify the components in the same relationship, and the order is not necessarily limited in the following description. 
     Throughout the specification, when it is said that a certain part includes certain constituent elements, this means that other constituent elements may be further included, rather than excluding other constituent elements, unless specifically stated otherwise. 
     As used herein, the term “and/or” includes any one or all combinations of the associated listed items. 
       FIG.  1    is a block diagram showing a configuration of a vehicle passenger accident prevention system according to an embodiment of the present disclosure. 
     Referring to  FIG.  1   , the vehicle passenger accident prevention system may include: a vehicle operation status measurement unit  10  that measures operation states of a vehicle and outputs corresponding signals, a driving unit  80  to drive the vehicle, a braking unit  90  to brake the vehicle, a forward collision avoidance assist system  44  (Hereinafter, it is called ‘FCA system’) that controls the operation of the driving unit  80  and the braking unit  90 , and a controller  42  that detects the seated state of a passenger in the vehicle or a wearing state of a seat belt according to the output signal of the vehicle operation status measurement unit  10 . In particular, the controller  42  controls the operation of the FCA system  44  according to a predetermined control mode in advance when a standing passenger in the vehicle is detected or an unbuckled seat belt is detected. The unbuckled seat belt is detected when a passenger in the vehicle does not buckle up the seat belt. 
     The driving unit  80  to drive a vehicle may include a general engine (e.g., an internal combustion engine), the combination of an engine and a motor, or a motor. The braking unit  90  may include a physical brake, an automatic brake and/or a brake, and a regenerative braking system. 
     The FCA system  44  detects a collision situation with a vehicle or a pedestrian in advance, calculates a time-to-collision (TTC) of the vehicle or pedestrian (e.g., a pedestrian in front of the vehicle), sends a warning sound to the driver, and controls the vehicle&#39;s braking. 
     For example, the FCA system  44  may control the operation of the braking unit  90 , or the braking unit  90  and the driving unit  80 . 
     The vehicle operation status measurement unit  10  may include: a passenger count sensor  12 , which detects the passenger when the passenger enters or leaves the vehicle and outputs the corresponding output signal; a sitting detecting sensor  14  to detect whether a passenger is seated in the seat and output the corresponding signal; and a belt wearing detecting sensor  16  that detects whether a seat belt is buckled or unbuckled and outputs the corresponding signal. 
     In one embodiment, the passenger count sensor  12  is an optical sensor disposed near the vehicle door where the passenger gets on and off and counts the number of passengers who are getting on and off, and then outputs the corresponding signal to the controller  42 . 
     In one embodiment, the sitting detecting sensor  14  is an optical sensor or pressure sensor, which may be disposed near a seat or in a seat of a vehicle, and detects a state in which a passenger is sitting on the seat, and then outputs the corresponding signal to the controller  42 . 
     The belt wearing detecting sensor  16  may detect whether a seat belt is buckled as a pressure sensor or a current detecting sensor and output the corresponding signal to the controller  42 . 
     The controller  42  may determine the seating status of the passenger in the vehicle. 
     In detail, the controller  42  may determine the seated state of a passenger in the vehicle by subtracting the number of seated passengers detected by the sitting detecting sensor  14  from the number of passengers in the vehicle detected by the passenger count sensor  12 . 
     In addition, the controller  42  may determine whether each passenger is wearing the seat belt. 
     In other words, the controller  42  may determine each passenger&#39;s state of wearing the seat belt of the corresponding seat according to output signals of the sitting detecting sensor  14  and the belt wearing detecting sensor  16 . 
     In addition, the vehicle operation status measurement unit  10  may further include an accelerator pedal sensor  30  that measures an accelerator opening state and outputs the corresponding signal, and a brake pedal sensor  32  that measures a brake operation state and outputs the corresponding signal. 
       FIG.  2    is a drawing showing a display system that may be applied to a vehicle passenger accident prevention system according to an embodiment of the present disclosure. 
     Referring to  FIG.  2   , the vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include a display system  100  for displaying the seating state of the passenger in the vehicle or the wearing state of the seat belt of the seat. 
     The display system  100  may display the operation status of the FCA system  44 . 
     In one embodiment, the display system  100  may include one or a plurality of status boards  112  and  114  and/or one or a plurality of notice boards  116 , and  118 . 
     In one embodiment, the status boards  112  and  114  may indicate the seating status of the passenger and the wearing status of the seat belt for each vehicle seat. 
     For example, the seating status of the passengers in the front and rear of the vehicle and the wearing status of the seat belt may be displayed on the first panel  112  and the second panel  114 . In the case of a double-decker bus, the seating status of the passengers on the 1 st  and 2 nd  floors of the vehicle and the wearing status of the seat belt may also be displayed on the first panel  112  and the second panel  114 . 
     A warning about the operation of the FCA system  44  may be displayed on the first notice board  116 , or the operation limit of the FCA system  44  may be indicated on the second notice board  118 . 
     The warning for the operation of the FCA system  44  may inform the driver and passenger of the operation situation of the FCA system  44  in advance, and the operation limit of the FCA system  44  may include information such as limit of engine rpm for passenger protection. 
     The display system  100  may be a plurality of divided separate displays, or a plurality of situations or warnings may be displayed on one display. 
     Since the configuration and operation of the display system  100  are obvious to those having ordinary skill in the art, a detailed description thereof has been omitted. 
     The vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include a voice guidance system  110  for warning the wearing state of the seat belt of the seat or the seated state of the passenger in the vehicle. 
     The voice guidance system  110  may perform announcements such as the operation or restriction of the FCA system  44  for the driver, a seating warning for the passenger, and a warning about wearing a seat belt. 
     Referring to  FIG.  1   , the vehicle operation status measurement unit  10  may include a vehicle speed sensor  18  that measures the vehicle speed and outputs the corresponding signal, a distance sensor  20  that measures the distance to the vehicle in front and outputs the corresponding signal, and an optical camera  22  that captures surrounding images of the vehicle and outputs the corresponding signal. 
     The distance sensor  20  may detect a vehicle or a pedestrian in front of the distance sensor using radar and output the corresponding signal to the controller  42 . 
     The controller  42  may determine whether the operation condition of the FCA system  44  is satisfied according to the output signals of the vehicle speed sensor  18 , the distance sensor  20  and the optical camera  22 . 
     The operation condition of the FCA system  44  means a condition in which the risk of collision with other vehicles, pedestrians or objects is expected based on the current driving situation of the vehicle, which is obvious to those skilled in the art and detailed description is omitted. 
     Hereinafter, the control mode performed by the controller  42  is described. 
     The control mode may include an FCA system normal mode to operate the FCA system  44  normally when it is determined that an operation condition of the FCA system  44  is satisfied according to the output signal of the vehicle operation status measurement unit  10 , and it is determined that there is no standing passenger in the vehicle and there is no unbuckled seat belt according to the output signal of the vehicle operation status measurement unit  10 . 
     For example, the controller  42  determines whether the operation condition of the FCA system  44  corresponds to the output signal of the vehicle speed sensor  18 , the distance sensor  20  and the optical camera  22 . 
     In addition, the controller  42  determines the presence or absence of a standing passenger in the vehicle and the presence or absence of a passenger not wearing a seat belt (i.e., an unbuckled passenger sitting in a seat) according to the output signals of the passenger count sensor  12 , the sitting detecting sensor  14  and the belt wearing detecting sensor  16 . 
     The normal operation of the FCA system  44  may include a series of processes for example that when the controller  42  detects a risk of collision, it warns through the display system  100  and/or the voice guidance system  110 , when the controller  42  determines that the risk of collision is increased, the controller  42  limits the output of the driving unit  80  and operates the braking unit  90 , and also the controller  42  performs emergency braking of the braking unit  90  if the controller  42  determines that a collision risk is imminent. 
     The control mode may include an FCA system preemptive operation mode to operate the FCA system  44  in advance when it is judged to correspond to the operation condition of the FCA system  44  according to the output signal of the vehicle operation status measurement unit  10 , and it is determined that there is a standing passenger in the vehicle or there is an unbuckled passenger according to the output signal of the vehicle operation status measurement unit  10 . 
     In the FCA system preemptive operation mode, the controller  42  may operate the FCA system  44  by applying a predetermined preemptive collision duration that is increased more than a predetermined collision duration in the FCA system normal mode. 
     For example, in the FCA system normal mode, the controller  42  limits the output of the driving unit  80  to a predetermined normal operation time t 1  before the calculated expected collision time (i.e., TTC), and operates the braking unit  90 . 
     However, in the FCA system preemptive operation mode, the controller  42  may limit the output of the driving unit  80  at preemptive time t 2  before the normal operation time t 1 , and operate the braking unit  90 . 
     For example, the preemptive time t 2  may be set to twice the normal operation time t 1 , but is not limited thereto. 
     If there is a standing passenger in the vehicle or there is an unbuckled passenger, and if the FCA system  44  operates at the normal time t 1 , the passenger (e.g., the standing passenger or unbuckled passenger) may slip or fall and be injured. However, in the FCA system preemptive operation mode, the controller  42  limits the output of the driving unit  80  in advance at the preemptive time t 2  and operates the braking unit  90  to ensure passenger safety. 
     For example, in the FCA system normal mode, the FCA system  44  is operated one second before the expected collision time considering the current vehicle speed and the distance to the vehicle or pedestrian. On the other hand, in the FCA system preemptive operation mode, the FCA system  44  may be operated in advance two seconds before the expected collision time. 
     The figures are for convenience of understanding, but is not limited thereto. 
     In the FCA system preemptive operation mode, the controller  42  may operate the FCA system  44  by applying a predetermined preemptive vehicle deceleration rate a 2  that is further reduced than a predetermined vehicle deceleration rate a 1  in the FCA system normal mode. 
     For example, the preemptive vehicle deceleration rate a 2  may be ½ of the vehicle deceleration rate a 1 , but is not limited thereto. 
     For example, if the vehicle deceleration rate in normal state a 1  is −6 m/s2, the preemptive vehicle deceleration rate a 2  is set to −3 m/s2 to reduce the inertia force applied to the passenger to promote passenger safety. 
     The figures are for convenience of understanding, but is not limited thereto. 
     Referring to  FIG.  1   , the vehicle passenger accident prevention system according to an embodiment of the present disclosure may further include an advanced smart cruise control system  46  (Hereinafter, it is called ‘ASCC system’) having a function of maintaining an inter-vehicle distance with the front vehicle. 
     The ASCC system  46  drives at a constant speed at the speed set by the driver when there is no preceding vehicle according to the output signal of the vehicle speed sensor  18 , the distance sensor  20  and the optical camera  22 , and the ASCC system  46  detects the speed and distance of the front vehicle when the preceding vehicle is recognized and controls the distance between the vehicle and the vehicle ahead. 
     Since the configuration and operation of a general ASCC system is obvious to those having ordinary skill in the art, a detailed description thereof has been omitted. 
     The control mode may further include an inter-vehicle distance preemptive operation mode to operate the ASCC system  46  in advance before the operation of the FCA system  44  when it is determined to correspond to the operation condition of the FCA system  44  according to the output signal of the vehicle operation status measurement unit  10 , it is determined that there is a standing passenger in the vehicle or there is an unbuckled passenger according to the output signal of the vehicle operation status measurement unit  10 , and it is determined to correspond to a predetermined inter-vehicle distance preemptive operation condition according to the output signal of the vehicle operation status measurement unit  10 . 
     The controller  42  calculates the collision duration according to the signals output from the vehicle speed sensor  18  and the distance sensor  20 , and if the calculated collision duration is longer than the predetermined collision duration, the controller  42  determines that the vehicle-to-vehicle distance preemptive operation mode is applicable. 
     In other words, if the calculated current collision duration is less than or equal to the predetermined collision duration, the FCA system  44  is operated to avoid the collision, and if the calculated current collision duration is longer than the predetermined collision duration, the ASCC system  46  is operated in advance. So that the speed of the vehicle can be reduced gradually. 
     For example, the predetermined collision duration may be the preemptive time t 2  in the FCA system preemptive operation mode, and if the calculated current collision duration t 3  is less than or equal to the preemptive time t 2 , the FCA system  44  is operated. And if the calculated current collision duration t 3  is longer than the preemptive time t 2 , the ASCC system  46  may be operated in advance to reduce the vehicle speed gradually. 
     In the inter-vehicle distance preemptive operation mode, the controller may operate the ASCC system by applying a predetermined inter-vehicle distance longer than the predetermined inter-vehicle distance in the FCA system normal mode. 
     For example, if there is no standing passenger in the vehicle and there is no unbuckled passenger, according to the output signal of the vehicle speed sensor  18  and the distance sensor  20 , the controller  42  operates the ASCC system  46  when the distance to the vehicle in front is a predetermined distance L 1  in consideration of the speed difference between the vehicle in front and the vehicle. 
     However, if there is a standing passenger in the vehicle or there is an unbuckled seat belt, according to the output signal of the vehicle speed sensor  18  and the distance sensor  20 , the controller  42  operates the ASCC system  46  when the distance to the vehicle in front is a predetermined distance L 2  in consideration of the speed difference between the vehicle in front and the vehicle in advance. 
     For example, the inter-vehicle distance L 2  in the preemptive operation mode may be twice the predetermined distance L 1  under normal circumstances. 
     If there is a standing passenger, etc., if the ASCC system  46  is operated in advance, the inertia force applied to the passenger can be reduced to promote passenger safety. 
     The vehicle operation status measurement unit  10  may further include: an outside temperature sensor  24  that measures the outside temperature and outputs the corresponding signal; a rain sensor  26  detecting rain, snow, etc. and outputting the corresponding signal; and a blind spot detection warning system  29  (Hereinafter, it is called ‘BSD system’) that detects the presence of objects around the vehicle and outputs the corresponding signal. 
     The control mode may further include an environment preemptive operation mode to operate the ASCC system  46  in advance before the operation of the FCA system  44  when it is determined to correspond to the operation condition of the FCA system  44  according to the output signal of the vehicle operation status measurement unit  10 , it is determined that there is a standing passenger in the vehicle or there is an unbuckled passenger according to the output signal of the vehicle operation status measurement unit  10 , and it is determined to correspond to a predetermined environmental preemptive operation condition according to the output signal of the vehicle operation status measurement unit  10 . 
     The controller  42  may determine whether it corresponds to the environment preemptive operation mode according to the output signal of the outside temperature sensor  24 , the rain sensor  26  or the blind spot detection warning system  29 . 
     For example, the environment preemptive operation mode is a mode that operates when the weather is bad, such as rain or snow, or when another vehicle approaches next to the vehicle. By reducing the speed, the inertia force applied to the passenger can be reduced and the safety of the passenger can be promoted. 
     When it is determined that the controller  42  corresponds to the environment preemptive operation mode, the controller  42  may control the operation of the ASCC system  46  to reduce the vehicle speed to a predetermined speed. 
     For example, the controller  42  may promote passenger safety by reducing the vehicle speed in advance by setting the target vehicle speed to ½ of a predetermined vehicle speed when the weather is clear and there is no adjacent vehicle. 
     The controller  42  may be implemented by one or more microprocessors (e.g., ECU (Engine Control Unit or Electronic Control Unit) operating according to a set program, and the set program may include a series of instructions for performing a method according to an embodiment of the present disclosure to be described later. 
     The instruction may be stored in a memory  50 . 
     In  FIG.  1   , the controller  42 , the FCA system  44  and the ASCC system  46  are indicated as separate configurations, but are not limited thereto. 
     In other words, the controller  42 , the FCA system  44  and the ASCC system  46  may perform each function as a physically separated and separate configuration, or the controller  42 , the FCA system  44  and/or the ASCC system  46  may perform each function as one integrated controller  40 . 
     In addition, in  FIG.  2   , the display system  100  may display a warning or operation status during the operation of the FCA system  44  and the ASCC system  46 . 
       FIG.  3    and  FIG.  4    are flowcharts showing a control method of a vehicle passenger accident prevention system according to an embodiment of the present disclosure. 
     Hereinafter, referring to  FIG.  1    to  FIG.  4   , a control method of a vehicle passenger accident prevention system according to an embodiment of the present disclosure is described below. 
     The control method may be applied to the vehicle passenger accident prevention system according to the embodiment of the present disclosure described above. 
     When the vehicle departures, the vehicle operation status measurement unit  10  monitors the operation status of the vehicle, and outputs the corresponding signal to the controller  42  or the integrated controller  40  at step S 10 . 
     The controller  42  may monitor the seating status of the passenger in the vehicle at step S 12 . 
     For example, the controller  42  may determine the seated state of a passenger in the vehicle by subtracting the number of seated passengers detected by the sitting detecting sensor  14  from the number of passengers in the vehicle detected by the passenger count sensor  12 . 
     Also, the controller  42  may monitor whether the passenger is wearing the seat belt at step S 14 . 
     For example, the controller  42  may determine the wearing state of the seat belt of the corresponding seat according to output signals of the sitting detecting sensor  14  and the belt wearing detecting sensor  16 . 
     The controller  42 , the FCA system  44  and/or the ASCC system  46  may perform each function as one integrated controller  40 , but for better comprehension, the controller  42 , the FCA system  44  and the ASCC system  46  are described as separate and separate configurations. 
     The control method of the vehicle passenger accident prevention system according to an embodiment of the present disclosure may include determining whether the controller  42  satisfies a departure condition of the vehicle before departure of the vehicle at step S 20 , and controlling the operation of the driving unit  80  and the braking unit  90  to prohibit the vehicle from starting if the controller  42  determines that the vehicle&#39;s departure condition is not satisfied at step S 22   
     The step S 22  may also include maintaining an operation state of a parking auto brake. 
     For example, if the controller  42  determines that there is a standing passenger in the vehicle or there is an unbuckled seat belt indicating an unbuckled passenger, it is determined that the departure condition of the vehicle is not satisfied at step S 20 , and the departure of the vehicle may be prohibited at step S 22 . 
     In addition, the controller  42  may warn this through the display system  100  at step S 24  and guide it through the voice guidance system  110  at step S 26 . 
     If the controller  42  determines that the vehicle&#39;s departure condition is satisfied at step S 20 , the controller  42  detects the operation status of the accelerator pedal sensor  30  and the brake pedal sensor  32  to confirm the driver&#39;s will to start at step S 30 , then the controller  42  may release the operation state of the parking auto brake according to the output signal of the accelerator pedal sensor  30  at step S 32 . 
     Here, the vehicle operation status measurement unit  10  monitors the operation status of the vehicle in real time, and maintains the output of the corresponding signal to the controller  42  or the integrated controller  40 . 
     While driving the vehicle, the controller  42  determines whether it corresponds to the operation condition of the FCA system  44  at step S 40 . 
     In other words, the controller  42  may determine whether the FCA system  44  corresponds to the operation condition in considering whether a collision is expected according to the output signals of the vehicle speed sensor  18 , the distance sensor  20  and the optical camera  22 . 
     The controller  42  determines the seated state of the passenger in the monitored vehicle and the state of wearing the seat belt of the corresponding seat at step S 50 . 
     In other words, the controller  42  determines the seated state of a passenger in the vehicle by subtracting the number of seated passengers detected by the sitting detecting sensor  14  from the number of passengers detected by the passenger count sensor  12 . The controller  42  also determines the wearing state of the seat belt of the corresponding seat according to the output signals of the sitting detecting sensor  14  and the belt wearing detecting sensor  16  at step S 50 . 
     If the controller  42  determines that the operation condition of the FCA system  44  is satisfied at step S 40  and there is no standing passenger in the vehicle, and there is no unbuckled passenger at step S 50 , the controller  42  performs the FCA system normal mode to operate the FCA system  44  normally at step S 60 . 
     If it is determined that the operation condition of the FCA system  44  is satisfied at step S 40 , and it is determined that there is a standing passenger in the vehicle or there is an unused seat belt indicating an unbuckled passenger in S 50 , the FCA system preemptive operation mode is performed at step S 100 . 
     As described above, in the FCA system preemptive operation mode, the controller  42  limits the output of the driving unit  80  at preemptive time t 2  before the normal operation time t 1 , and operates the braking unit  90  in advance to prevent rapid braking of the vehicle. 
     Hereinafter, referring to  FIG.  4   , the operation of the FCA system preemptive operation mode of the vehicle including the ASCC system  46  is described. 
     As described above, in the vehicle including the ASCC system  46 , the ASCC system  46  may be operated in advance prior to the operation of the FCA system  44 . 
     In the control method, the controller  42  calculates the collision duration according to the signals output from the vehicle speed sensor  18  and the distance sensor  20  and compares it with the predetermined collision duration to determine whether the predetermined inter-vehicle distance preemptive operation condition is satisfied at step S 110 . 
     In the inter-vehicle distance preemptive operation condition, if the calculated collision duration t 3  described above is longer than the predetermined collision duration t 2 , it is determined that the inter-vehicle distance preemptive operation condition is satisfied. The controller  42  may perform an inter-vehicle distance preemptive operation mode in which the ASCC system  46  operates in advance before the operation of the FCA system  44  at step S 120 . 
     The controller  42  may determine whether the environment preemptive operation condition is satisfied at step S 130 , and then the controller  42  perform the environment preemptive operation mode at step S 140   
     As described above, the controller  42  may determine whether it corresponds to the environment preemptive operation mode according to the output signal of the outside temperature sensor  24 , the rain sensor  26  or the blind spot detection warning system  29 . 
     If the controller  42  is judged to correspond to the environment preemptive operation mode, the controller  42  controls the operation of the ASCC system  46  to reduce the vehicle speed, for example, the vehicle speed in advance than the vehicle speed under normal circumstances to promote passenger safety. 
     Thereafter, the controller  42  operates the FCA system  44  in advance at step S 150 , and at this time, the controller  42  applies the set preemptive vehicle deceleration rate a 2  to operate the FCA system  44  at step S 160 . 
     As described above, according to the vehicle passenger accident prevention system and the control method for the same according to an embodiment of the present disclosure, the safety accident of the passenger may be prevented by determining whether the vehicle is in a departure possible state, and while the vehicle is operating, and it is possible to secure a safe distance from other vehicles by limiting the speed of the vehicle. 
     In addition, according to the additional function operation of the FCA system  44 , it is possible to protect the passenger by reducing the vehicle speed and vehicle deceleration rate compared to the normal operation, and to prevent the safety accident of the passenger standing in the vehicle during the FCA system  44  operation. 
     While this present disclosure has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the present disclosure is not limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. 
     
       
         
           
               
             
               
                   
               
               
                 &lt;Description of symbols&gt; 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                   
                 10: vehicle operation status 
                   
               
               
                   
                 measurement unit 
               
               
                   
                 12: passenger count sensor 
               
               
                   
                 14: sitting detecting sensor 
                 16: belt wearing detecting sensor 
               
               
                   
                 18: vehicle speed sensor 
                 20: distance sensor 
               
               
                   
                 22: optical camera 
                 24: outside temperature sensor 
               
               
                   
                 26: rain sensor 
                 28: BSD system 
               
               
                   
                 30: accelerator pedal sensor 
                 32: brake pedal sensor 
               
               
                   
                 40: integrated controller 
                 42: controller 
               
               
                   
                 44: FCA system 
                 46: ASCC system 
               
               
                   
                 50: memory 
                 80: driving unit 
               
               
                   
                 90: braking unit 
                 100: display system 
               
               
                   
                 110: voice guidance system.