Patent Publication Number: US-2021188220-A1

Title: Vehicle management system and vehicle management method

Description:
INCORPORATION BY REFERENCE 
     The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2019-232502 filed on Dec. 24, 2019. The content of the application is incorporated herein by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a vehicle management system and a vehicle management method. 
     Description of the Related Art 
     In related art, an air condition notification device has been suggested which detects a carbon dioxide concentration in a vehicle cabin by a gas sensor, causes an indicator lamp to be lit and a buzzer to sound when the carbon dioxide concentration in the vehicle cabin reaches a high level, and thereby notifies a state of air pollution in the vehicle cabin to an occupant (For example, see International Publication No. WO 2008/065870). 
     SUMMARY OF THE INVENTION 
     Technical Problem 
     The above vehicle management system in related art may detect that air pollution in a vehicle cabin progresses and notifies an occupant but may not cope with dirt in the vehicle cabin due to mud, spilled food, or the like. Further, when dirt in the vehicle cabin is left, user satisfaction particularly for a shared vehicle such as a vehicle for sharing may be lowered. 
     An object of the present invention, which has been made in consideration of such a background, is to provide a vehicle management system and a vehicle management method that may prevent dirt in a vehicle cabin from being left. 
     Solution to Problem 
     A first aspect for achieving the above object provides a vehicle management system including: a vehicle position recognition unit recognizing a position of a vehicle; a vehicle use situation recognition unit recognizing that a user of the vehicle visits a predetermined area or a predetermined facility by the vehicle based on the position of the vehicle recognized by the vehicle position recognition unit; and a vehicle cleaning handling unit transmitting vehicle cleaning information about cleaning of the vehicle to at least either one of a user terminal and a maintenance management server in a case where the vehicle use situation recognition unit recognizes that the user visits the predetermined area or the predetermined facility by the vehicle, the user terminal being used by the user, the maintenance management server managing maintenance of the vehicle. 
     The vehicle management system may be configured to further include a weather recognition unit recognizing weather of a spot where the vehicle is positioned and may be configured such that the vehicle use situation recognition unit recognizes that the vehicle is used in predetermined weather based on the weather of the spot where the vehicle is positioned, the weather being recognized by the weather recognition unit, and the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server in a case where the vehicle use situation recognition unit recognizes that the vehicle is used in the predetermined weather. 
     The vehicle management system may be configured to further include a power source state recognition unit recognizing a state of a power source provided in the vehicle and may be configured such that the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when the power source state recognition unit recognizes that the power source is switched from an ON state to an OFF state after the vehicle use situation recognition unit recognizes that the user of the vehicle visits the predetermined area or the predetermined facility by the vehicle. 
     The vehicle management system may be configured such that the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when movement of the vehicle from the predetermined area or the predetermined facility is recognized based on the position of the vehicle recognized by the vehicle position recognition unit after the vehicle use situation recognition unit recognizes that the user of the vehicle visits the predetermined area or the predetermined facility by the vehicle and the power source state recognition unit recognizes that the power source is switched from the ON state to the OFF state. 
     Next, a second aspect for achieving the above object provides a vehicle management system including: a weather recognition unit recognizing weather of a spot where a vehicle is positioned; a vehicle use situation recognition unit recognizing that the vehicle is used in predetermined weather based on the weather of the spot where the vehicle is positioned, the weather being recognized by the weather recognition unit; and a vehicle cleaning handling unit transmitting vehicle cleaning information about cleaning of the vehicle to at least either one of a user terminal and a maintenance management server in a case where the vehicle use situation recognition unit recognizes that the vehicle is used in the predetermined weather, the user terminal being used by the user of the vehicle, the maintenance management server managing maintenance of the vehicle. 
     The vehicle management system may be configured such that the vehicle is a rented vehicle, the vehicle management system includes a power source state recognition unit recognizing whether a power source provided in the vehicle is in an ON state or an OFF state, and the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when the power source state recognition unit recognizes that the power source is switched from the ON state to the OFF state in a state where the vehicle position recognition unit recognizes that the vehicle stands still at a return spot of the vehicle. 
     The vehicle management system may be configured such that the vehicle is a rented vehicle and the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when movement of the vehicle from the predetermined area or the predetermined facility is recognized based on the position of the vehicle recognized by the vehicle position recognition unit after the vehicle use situation recognition unit recognizes that the user visits the predetermined area or the predetermined facility by the vehicle and setting of a return spot of the vehicle as a destination of the vehicle is recognized. 
     The vehicle management system may be configured such that the vehicle is a rented vehicle and the vehicle management system includes a vehicle renting management unit prohibiting renting of the vehicle when the vehicle cleaning information is transmitted by the vehicle cleaning handling unit to at least either one of the user terminal and the maintenance management server, until a predetermined renting prohibited period elapses after the vehicle is returned. 
     The vehicle management system may be configured such that the vehicle renting management unit determines whether or not the renting prohibited period is set in accordance with a factor due to which the vehicle cleaning information is transmitted. 
     The vehicle management system may be configured to further include: a vehicle cabin interior information acquisition unit acquiring vehicle cabin interior information indicating a situation in a vehicle cabin of the vehicle; and a vehicle cabin interior cleaning estimation unit estimating that a vehicle cabin interior is cleaned based on the vehicle cabin interior information acquired by the vehicle cabin interior information acquisition unit and may be configured such that the vehicle renting management unit does not set the renting prohibited period when the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior is cleaned after the vehicle cleaning handling unit transmits the vehicle cleaning information to the user terminal. 
     The vehicle management system may be configured such that the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior is cleaned when the vehicle cabin interior cleaning estimation unit recognizes, based on the vehicle cabin interior information, that an occupant is present in the vehicle cabin until a predetermined time elapses after use of the vehicle by the user is finished. 
     The vehicle management system may be configured such that the vehicle cabin interior information acquisition unit acquires, as the vehicle cabin interior information, a load level detected by a load sensor provided to a seat of the vehicle and the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior is cleaned based on a change in the load level acquired by the vehicle cabin interior information acquisition unit. 
     The vehicle management system may be configured such that the vehicle is a rented vehicle and the vehicle management system includes a vehicle renting management unit checking a destination planned by the user and predicted weather in a use period of the vehicle when the vehicle renting management unit accepts renting of the vehicle, the vehicle renting management unit prohibiting renting of the vehicle in a case where the destination is the predetermined area or the predetermined facility and the predicted weather in the use period is the predetermined weather. 
     Next, a third aspect for achieving the above object provides a vehicle management method being executed by a vehicle management system, the vehicle management method including: a vehicle position recognition step of recognizing a position of a vehicle; a vehicle use situation recognition step of recognizing that a user of the vehicle visits a predetermined area or a predetermined facility by the vehicle based on the position of the vehicle recognized by the vehicle position recognition step; and a vehicle cleaning handling step of transmitting vehicle cleaning information about cleaning of the vehicle to at least either one of a user terminal and a maintenance management server in a case where a visit to the predetermined area or the predetermined facility by the user by the vehicle is recognized by the vehicle use situation recognition step, the user terminal being used by the user, the maintenance management server managing maintenance of the vehicle. 
     Advantageous Effects of Invention 
     In the above vehicle management system, a vehicle cleaning handling unit transmits vehicle cleaning information to at least either one of a user terminal and a maintenance management server when a vehicle use situation recognition unit recognizes that a user visits a predetermined area or a predetermined facility by a vehicle. Accordingly, the user or the maintenance management server is advised to handle cleaning of a vehicle cabin interior, and dirt in a vehicle cabin may thereby be prevented from being left, the dirt occurring when the user visits the predetermined area or the predetermined facility. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an explanatory diagram of a form in which a vehicle management system recognizes a dirt factor element in a vehicle cabin and a use situation of a vehicle and advises cleaning of a vehicle cabin interior; 
         FIG. 2  is an explanatory diagram of a configuration of the vehicle management system; 
         FIG. 3  is a flowchart of vehicle cabin dirt handling processing by a vehicle renting system; 
         FIG. 4  is a first flowchart of vehicle cabin dirt handling processing by a vehicle control device; 
         FIG. 5  is a second flowchart of the vehicle cabin dirt handling processing by the vehicle control device; and 
         FIG. 6  is a third flowchart of the vehicle cabin dirt handling processing by the vehicle control device. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     1. Form for Advising Cleaning of Vehicle Cabin Interior 
     With reference to  FIG. 1 , a description will be made about a form in which a vehicle management system  1  recognizes a dirt factor element in a vehicle cabin of a vehicle  10  and a use situation of the vehicle  10  and advises cleaning of a vehicle cabin interior of the vehicle  10 . The vehicle management system  1  includes a vehicle control device  20  installed in the vehicle  10  and a vehicle renting system  100  performing communication with the vehicle control device  20  via a communication network  500 . 
     The vehicle  10  is a rented vehicle rented to a user U by car-sharing, a car rental service, or the like and includes the vehicle control device  20  controlling an action of the vehicle  10  and an automotive navigation system (automotive navigation device)  50 . The vehicle renting system  100  manages renting of the vehicle  10  while setting a parking lot St as a delivery place. 
     The vehicle renting system  100  includes a rented vehicle database (DB)  110  storing management data of plural rented vehicles including the vehicle  10 . The rented vehicle DB  110  records information of a rented vehicle, a reservation status of a rented vehicle, information of a user of a rented vehicle, and so forth with respect to each rented vehicle. 
     The information of the rented vehicle includes a communication address of the rented vehicle, and the information of the user includes a communication address of a user terminal used by the user. The vehicle renting system  100  uses those communication addresses and thereby performs communication between the vehicle  10  and a user terminal  90  used by the user U via the communication network  500 . Further, the vehicle control device  20  performs communication between a maintenance management server  200  managing maintenance of the vehicle  10  and a weather information server  300  providing weather information via the communication network  500 . The user terminal  90  is a communication terminal such as a smartphone, a portable terminal, or a tablet terminal, each of which is carried and used by the user U. 
     The user U who reserves renting of the vehicle  10  starts use of the vehicle  10  from the parking lot St, returns the vehicle  10  to the parking lot St, and then finishes use of the vehicle  10 . During use by the user U, the vehicle control device  20  of the vehicle  10  acquires information in the vehicle cabin (images, sounds, smells, and so forth in the vehicle cabin) of the vehicle  10  and recognizes an element that may become a factor of occurrence of dirt such as eating and drinking in the vehicle cabin (dirt factor element). 
     Further, the vehicle control device  20  recognizes an area or facility visited by the user U by the vehicle  10  and traveling of the vehicle  10  in predetermined weather (for example, bad weather such as rain or snow) based on positions of the vehicle  10  recognized by the automotive navigation system  50 . In  FIG. 1 , as illustrated by A 1 , the user U visits a campsite (corresponding to a predetermined facility of the present invention) on a rough ground with a child K by the vehicle  10 , and the child K is eating and drinking in the vehicle cabin. Further, as illustrated in A 2 , the vehicle  10  travels in rainy weather. 
     When the vehicle control device  20  recognizes the dirt factor element and recognizes that the vehicle  10  is used in a situation, in which dirt is likely to occur, such as A 1  or A 2 , the vehicle control device  20  transmits first vehicle cleaning information CLi 1  to the user terminal  90  in order to advise cleaning of the vehicle cabin interior when the vehicle  10  is returned. Further, when the user U does not clean the vehicle cabin interior of the vehicle  10  in response to transmission of the first vehicle cleaning information CLi 1 , the vehicle control device  20  transmits second vehicle cleaning information CLi 2  to the maintenance management server  200  and requests cleaning of the vehicle cabin interior of the vehicle  10 . 
     Cleaning of the vehicle cabin interior of the vehicle  10  by the user U is advised by transmission of the first vehicle cleaning information CLI 1 , cleaning of the vehicle cabin interior of the vehicle  10  is requested to the maintenance management server  200  by transmission of the second vehicle cleaning information CLi 2 , and dirt in the vehicle cabin of the vehicle  10  may thereby be prevented from being left. 
     2. Configuration of Vehicle Management System 
     A configuration of the vehicle management system  1  will be described with reference to  FIG. 2 . The vehicle management system  1  is composed of the vehicle control device  20  installed in the vehicle  10  and the vehicle renting system  100 . 
     The vehicle control device  20  is an electronic control unit (ECU) composed of a central processing unit (CPU) not illustrated, a memory  30 , and so forth. The vehicle  10  includes the vehicle control device  20 , a communication unit  40 , a touch panel  41 , a speaker  42 , a vehicle cabin camera  43 , a microphone  44 , an odor sensor  45 , a load sensor  46 , a rain sensor  47 , a start switch  43 , the automotive navigation system  50 , a battery  60 , and so forth. 
     The communication unit  40  is an interface for performing communication among the vehicle renting system  100 , the maintenance management server  200 , and the weather information server  300  via the communication network  500 . The communication unit  40  receives, as an input, information output from the vehicle control device  20 , transmits the information to the outside, and outputs information received from the outside to the vehicle control device  20 . 
     The touch panel  41  is configured by arranging a touch sensor on a surface of a flat display such as a liquid crystal panel, inputs an operation signal of the touch sensor to the vehicle control device  20 , and changes a display screen in accordance with a control signal output from the vehicle control device  20 . The speaker  42  amplifies a sound signal output from the vehicle control device  20  and outputs that to the vehicle cabin interior. 
     The vehicle cabin camera  43  photographs the vehicle cabin interior and outputs the image of the vehicle cabin interior to the vehicle control device  20 . The microphone  44  detects a sound in the vehicle cabin and outputs a sound signal to the vehicle control device  20 . The odor sensor  45  detects an odor in the vehicle cabin and outputs an odor detection signal to the vehicle control device  20 . The load sensor  46  detects a load exerted on a seat (not illustrated) of the vehicle  10  and outputs a load detection signal indicating a load level to the vehicle control device  20 . 
     The rain sensor  47  detects a water drop dropping on a windshield (not illustrated) or the like of the vehicle  10 , thereby detects rainy weather, and outputs a rainy weather detection signal to the vehicle control device  20 . The automotive navigation system  50  includes a Global Positioning System (GPS) sensor (not illustrated) and map data and performs a route guidance to a destination based on the present position of the vehicle  10  detected by the GPS sensor and on the map data. The route guidance is performed by display of a guidance screen on the touch panel  41  and by an output of guidance sounds from the speaker  42 . 
     The start switch  48  is switched between a power source ON instruction state and a power source OFF instruction state in accordance with an operation by the user U. Further, the start switch  48  outputs a power source ON instruction signal to the vehicle control device  20  when becoming the power source ON instruction state and outputs a power source OFF instruction signal to the vehicle control device  20  when becoming the power source OFF instruction state. The vehicle control device  20  starts power supply from the battery  60  to electrical equipment installed in the vehicle  10  when the power source ON instruction signal is input and stops power supply from the battery  60  to the electrical equipment when a power source OFF instruction is input. The user U turns the start switch  48  to the power source ON instruction state when use of the vehicle  10  is started and turns the start switch  48  to an OFF instruction state when use of the vehicle  10  is finished. 
     In the memory  30 , a control program  31  of the vehicle  10 , reference image data  32 , and monitoring target sound data  33  are saved. In the reference image data  32 , reference images for a determination about whether or not dirt is present in the vehicle cabin based on an image of the vehicle cabin interior are recorded, and in the monitoring target sound data  33 , data of monitoring target sounds for a determination about whether dirt is present in the vehicle cabin based on a sound in the vehicle cabin are recorded. The CPU reads and executes a control program and thereby functions as a vehicle cabin interior information acquisition unit  21 , a dirt factor element recognition unit  22 , a vehicle position recognition unit  23 , a vehicle use situation recognition unit  24 , a weather recognition unit  25 , a power source state recognition unit  26 , a vehicle cleaning handling unit  27 , and a vehicle cabin interior cleaning estimation unit  28 . 
     A process executed by the vehicle position recognition unit  23  corresponds to a vehicle position recognition step in a vehicle management method of the present invention, and a process executed by the vehicle use situation recognition unit  24  corresponds to a vehicle use situation recognition step in the vehicle management method of the present invention. A process executed by the vehicle cleaning handling unit  27  corresponds to a vehicle cleaning handling step in the vehicle management method of the present invention. 
     The vehicle cabin interior information acquisition unit  21  acquires an image of the vehicle cabin interior photographed by the vehicle cabin camera  43 , a sound in the vehicle cabin input to the microphone  44 , a level of an odor in the vehicle cabin, the level of the odor being detected by the odor sensor  45 , and a level of a load exerted on a seat in the vehicle cabin, the level of the load being detected by the load sensor  46 , as vehicle cabin interior information of the vehicle  10 . 
     The dirt factor element recognition unit  22  recognizes the following first element to fourth element as dirt factor elements based on the vehicle cabin interior information acquired by the vehicle cabin interior information acquisition unit  21 . 
     First element: a situation in which an occupant contacts with food and drink. The dirt factor element recognition unit  22  extracts an image portion of the occupant and food and drink from an image of the vehicle cabin interior, the image acquired by the vehicle cabin interior information acquisition unit  21 , and thereby recognizes a situation in which the occupant contacts with food and drink. Contact with food and drink by the occupant is recognized, and occurrence of dirt in the vehicle cabin may thereby be predicted, the dirt being due to spilled food accompanying eating and drinking in the vehicle cabin. 
     Note that recognition of a sound, whose concordance rate is a third predetermined value or greater, in a situation in which the occupant contacts with food and drink may be set as the first element, the concordance rate being obtained between the sound in the vehicle cabin and the monitoring target sound recorded in the monitoring target sound data. As the monitoring target sounds, for example, a sound in a case of opening a lid of a canned drink or a bottled drink and a sound in a case of opening a bag of a snack are used. A determination is also made about a sound in the vehicle cabin, and a situation in which dirt in the vehicle cabin highly possibly occurs may thereby be recognized as the first element. 
     Second element: a situation in which a child is riding in the vehicle. The dirt factor element recognition unit  22  extracts an image portion of the child from an image of the vehicle cabin interior, the image acquired by the vehicle cabin interior information acquisition unit  21 , and thereby recognizes a situation in which the child is riding in the vehicle. Note that voice of the child is extracted from sounds in the vehicle cabin acquired by the vehicle cabin interior information acquisition unit  21 , and a situation in which the child is riding in the vehicle may thereby be recognized. A ride of the child in the vehicle is recognized, and occurrence of dirt in the vehicle cabin due to behavior of the child may thereby be predicted. 
     Third element: a fact that the concordance rate between an image of the vehicle cabin interior at a finish of use of the vehicle  10  and the reference image recorded in the reference image data  32  is a first predetermined value or smaller. The vehicle cabin interior information acquisition unit  21  acquires the image of the vehicle cabin interior at the finish of use of the vehicle  10  by photographing by the vehicle cabin camera  43  at a timing when the start switch  48  is operated to OFF. As the reference image, an image of the vehicle cabin interior in a state where dirt is not present or an image of the vehicle cabin interior at a time point when the user U starts using the vehicle  10  is used. By using the concordance rate between the image of the vehicle cabin interior at the finish of use of the vehicle and the reference image, occurrence of dirt in the vehicle cabin may be estimated from the change in the situation in the vehicle cabin. 
     Fourth element: a fact that the level of the odor in the vehicle cabin is a predetermined level or higher. An odor emitted from food and drink is detected when eating and drinking are performed in the vehicle cabin, and occurrence of dirt in the vehicle cabin due to spilled food may thereby be predicted. 
     Fifth element: a fact that the concordance rate between a sound in the vehicle cabin and the monitoring target sound recorded in the monitoring target sound data  33  is a second predetermined value or greater. As described above, the sound in a case of opening a lid of a canned drink or a bottled drink or the sound in a case of opening a bag of a snack is recognized, and occurrence of dirt in the vehicle cabin due to spilled food may thereby be predicted. 
     Here, in the above third element, the concordance rate between the image of the vehicle cabin interior at the finish of use of the vehicle  10  and the reference image is calculated by using an image recognition technology such as template matching. Further, in the above fifth element, the concordance rate between the sound in the vehicle cabin and the monitoring target sound is calculated by analyzing the intensity of a sound such as a sound pressure, a frequency band, or the like. 
     The vehicle position recognition unit  23  recognizes a spot where the vehicle  10  is positioned based on the present position (latitude and longitude) of the vehicle  10  detected by the automotive navigation system  50  and the map data. The weather recognition unit  25  recognizes the weather at the spot where the vehicle  10  is positioned based on a detection situation of the rain sensor  47 , weather information of an area including the present position of the vehicle  10 , the weather information being acquired from the weather information server  300 , and so forth. 
     The vehicle use situation recognition unit  24  recognizes that the user U visits a predetermined area or a predetermined facility by the vehicle  10  from the position of the vehicle  10  recognized by the vehicle position recognition unit  23 . The predetermined area and the predetermined facility are set on the assumption that dirt in the vehicle cabin is likely to occur. The predetermined area is an area such as seashore or grassland where shoes or clothes of the occupant are likely to get dirty when the occupant gets off the vehicle, for example, and the predetermined facility is also a facility such as a campsite or a ski site where shoes or clothes of the occupant are likely to get dirty when the occupant gets off the vehicle. Further, the vehicle use situation recognition unit  24  recognizes that the vehicle  10  is used in bad weather such as rain or snow based on the position of the vehicle  10  recognized by the vehicle position recognition unit  23  and the weather recognized by the weather recognition unit  25 . 
     The power source state recognition unit  26  recognizes whether the battery  60  is in a power source ON state where power is supplied from the battery  60  to the electrical equipment or a power source OFF state where power supply from the battery  60  to the electrical equipment is shut off in accordance with an ON instruction signal and OFF instruction signal output from the start switch  48 . The vehicle cleaning handling unit  27  transmits the first vehicle cleaning information CLi 1  to the user terminal  90  and transmits the second vehicle cleaning information CLi 2  to the maintenance management server  200  when the dirt factor element recognition unit  22  recognizes at least any one of the above first element to fifth element, the vehicle use situation recognition unit  24  recognizes that the user U visits the predetermined area or the predetermined facility by the vehicle  10 , and when it is recognized that the vehicle  10  travels in a situation in which the weather recognition unit  25  recognizes bad weather. 
     The vehicle cabin interior cleaning estimation unit  28  estimates that the user U has cleaned the vehicle cabin interior based on the vehicle cabin interior information acquired by the vehicle cabin interior information acquisition unit  21 . Specifically, the vehicle cabin interior cleaning estimation unit  28  estimates that the user U has cleaned the vehicle cabin interior when at least any one of the following estimation situation 1 to estimation situation 4 is recognized. 
     Estimation situation 1: the concordance rate between an image of the vehicle cabin interior photographed by the vehicle cabin camera  43  after transmission of the first vehicle cleaning information CLi 1  to the user terminal  90  and the reference image is higher than a first predetermined value. 
     Estimation situation 2: the level of the odor detected by the odor sensor  45  after transmission of the first vehicle cleaning information CLi 1  to the user terminal  90  is a predetermined level or lower. 
     Estimation situation 3: the load detected by the load sensor  46  after transmission of the first vehicle cleaning information CLi 1  to the user terminal  90  fluctuates in a prescribed width or wider through a predetermined time. 
     Estimation situation 4: an occupant such as the user U is present in the vehicle cabin of the vehicle  10  from a time point when the power source state recognition unit  26  recognizes that the power source ON state is switched to the power source OFF state after transmission of the first vehicle cleaning information CLi 1  to the user terminal  90  until a predetermined time elapses. 
     3. Vehicle Cabin Dirt Handling Processing 
     Following flowcharts illustrated in  FIG. 3  to  FIG. 5 , a description will be made about vehicle cabin dirt handling processing executed by the vehicle control device  20  and the vehicle renting system  100 . 
       FIG. 3  is the flowchart of the vehicle cabin dirt handling processing executed by the vehicle renting system  100 . In step S 3  in  FIG. 3 , a vehicle renting management unit  101  of the vehicle renting system  100  moves the processing to step S 2  when an application for renting of the vehicle  10  is made by the user U. The user U executes vehicle renting application software by the user terminal  90  and performs an operation of the application for renting the vehicle  10 , and renting application information is thereby transmitted from the user terminal  90  to the vehicle renting system  100 . The vehicle renting system  100  receives this renting application information and accepts the application for renting of the vehicle  10  by the user U. 
     In step S 2 , the vehicle renting management unit  101  recognizes a destination to be visited by the user U by the vehicle  10  from use plan information of the vehicle  10 , the use plan information being provided from the user U, and determines whether or not the destination is the above-described predetermined area or predetermined facility. Then, the vehicle renting management unit  101  moves the processing to step S 10  when the destination is the predetermined area or the predetermined facility but moves the processing to step S 3  when the destination is neither the predetermined area nor the predetermined facility. 
     In step S 10 , the vehicle renting management unit  101  determines whether or not use in bad weather such as a snowstorm is predicted during a use period of the vehicle  10  by the user U based on information of predicted weather, the information being provided from the weather information server  300 . Then, the vehicle renting management unit  101  moves the processing to step S 11  when movement in bad weather is predicted and prohibits renting of the vehicle  10 . Accordingly, use of the vehicle  10  under a condition with a very strong possibility of occurrence of dirt in the vehicle cabin may be avoided which is movement to the predetermined area or the predetermined facility in bad weather, and occurrence of dirt in the vehicle cabin of the vehicle  10  may thereby be prevented. 
     On the other hand, when movement in bad weather is not predicted, the vehicle renting management unit  101  moves the processing from step S 2  to step S 3  and permits renting of the vehicle  10  to the user U. Step S 4  and subsequent steps are processes in a case where the vehicle  10  is returned, and process contents will be described later. 
     Next,  FIG. 4  to  FIG. 6  are flowcharts of vehicle cabin dirt handling processing executed by the vehicle control device  20 . The vehicle control device  20  starts the processing of the flowcharts of  FIG. 4  to  FIG. 6  when a start of use of the vehicle  10  is recognized. The vehicle control device  20  determines that use of the vehicle  10  is started when the power source state recognition unit  26  recognizes that the power source OFF state is switched to the power source ON state. 
     In step S 50  in  FIG. 4 , the vehicle cabin interior information acquisition unit  21  photographs the vehicle cabin interior of the vehicle  10  by the vehicle cabin camera  43  and acquires an image of the vehicle cabin interior. In next step S 51 , the dirt factor element recognition unit  22  moves the processing to step S 70  when a ride of a child in the vehicle (the above second element) is recognized from the image of the vehicle cabin interior, sets a child-in-vehicle flag to “1”, and moves the processing to step S 52 . Note that an initial value of each flag is set as “0”. On the other hand, the dirt factor element recognition unit  22  moves the processing to step S 52  when a ride of a child in the vehicle is not recognized from the image of the vehicle cabin interior. 
     In step S 52 , the dirt factor element recognition unit  22  moves the processing to step S 71  when a situation in which an occupant contacts with food and drink (the above first element) is recognized from the image of the vehicle cabin interior, sets a vehicle cabin eating-and-drinking flag to “1”, and moves the processing to step S 53 . On the other hand, when the situation in which the occupant contacts with food and drink is not recognized from the image of the vehicle cabin interior, the dirt factor element recognition unit  22  moves the processing to step S 53 . 
     In step S 53 , the vehicle cabin interior information acquisition unit  21  detects the odor in the vehicle cabin by the odor sensor  45  and acquires an odor level in the vehicle cabin. In next step S 54 , the dirt factor element recognition unit  22  moves the processing to step S 72  when the odor level in the vehicle cabin is the predetermined level or higher (the above fourth element), sets the vehicle cabin eating-and-drinking flag to “1”, and moves the processing to step S 55 . On the other hand, the dirt factor element recognition unit  22  moves the processing from step S 54  to step S 55  when the odor level in the vehicle cabin is lower than the predetermined level. 
     In step S 55 , the vehicle cabin interior information acquisition unit  21  detects the sound in the vehicle cabin by the microphone  44 . In next step S 56 , the dirt factor element recognition unit  22  moves the processing to step S 73  when the concordance rate between the sound in the vehicle cabin and the monitoring target sound is the second predetermined value or greater (the above fifth element), sets the vehicle cabin eating-and-drinking flag to “1”, and moves the processing to step S 57  in  FIG. 5 . On the other hand, when the concordance rate between the sound in the vehicle cabin and the monitoring target sound is lower than the second predetermined value, the dirt factor element recognition unit  22  moves the processing from step S 56  to step S 57  in  FIG. 5 . 
     In step S 57 , the vehicle use situation recognition unit  24  recognizes the use situation of the vehicle  10  based on the present position of the vehicle  10  recognized by the vehicle position recognition unit  23 . In next step S 58 , the vehicle use situation recognition unit  24  moves the processing to step S 74  when it is recognized that the user U visits the predetermined area or the predetermined facility by the vehicle  10 , sets a target destination flag to “1”, and moves the processing to step S 59 . On the other hand, when the user U visits neither the predetermined area nor the predetermined facility, the vehicle use situation recognition unit  24  moves the processing from step S 58  to step S 59 . 
     In step S 59 , the weather recognition unit  25  recognizes the weather of the spot where the vehicle  10  is positioned. In next step S 60 , when it is recognized that the vehicle  10  travels in bad weather based on the position of the vehicle  10  recognized by the vehicle position recognition unit  23  and the weather recognized by the weather recognition unit  25 , the vehicle use situation recognition unit  24  moves the processing to step S 75 , sets a bad weather traveling flag to “1”, and moves the processing to step  361 . On the other hand, when it is not recognized that the vehicle  10  travels in bad weather, the vehicle use situation recognition unit  24  moves the processing from step S 60  to step S 61 . 
     In step S 61 , the vehicle cabin interior information acquisition unit  21  moves the processing to step S 62  when the vehicle position recognition unit  23  recognizes that the vehicle  10  arrives at the parking lot St (see  FIG. 1 ) as a return spot and stands still and the power source state recognition unit  26  recognizes the power source OFF state. On the other hand, when the vehicle  10  does not arrive at the parking lot St or is not in the power source OFF state, the vehicle cabin interior information acquisition unit  21  moves the processing to step S 50  in  FIG. 4  and repeatedly executes processes of step  350  and subsequent steps. 
     In step S 62 , the vehicle cabin interior information acquisition unit  21  photographs the vehicle cabin interior by the vehicle cabin camera  43  and acquires an image of the vehicle cabin interior. In next step S 63 , the dirt factor element recognition unit  22  moves the processing to step S 76  when the concordance rate between the image of the vehicle cabin interior and the reference image is the first predetermined value or smaller, sets a vehicle cabin change flag to “1”, and moves the processing to step S 64  in  FIG. 6 . On the other hand, when the concordance rate between the image of the vehicle cabin interior and the reference image is higher than the first predetermined value, the processing is moved from step S 63  to step S 64  in  FIG. 6 . 
     In step S 64  in  FIG. 6 , the vehicle cleaning handling unit  27  moves the processing to step  380  when at least one of the child-in-vehicle flag, the vehicle cabin eating-and-drinking flag, the target destination flag, the bad weather traveling flag, and the vehicle cabin change flag is set to “1”. On the other hand, when each of the child-in-vehicle flag, the vehicle cabin eating-and-drinking flag, the target destination flag, the bad weather traveling flag, and the vehicle cabin change flag is set to “0”, the vehicle cleaning handling unit  27  moves the processing from step S 64  to step S 65 . 
     In step S 80 , the vehicle cleaning handling unit  27  transmits the first vehicle cleaning information CLi 1  for advising cleaning of the vehicle cabin interior to the user terminal  90 . In next step S 81 , the vehicle cabin interior cleaning estimation unit  28  estimates whether or not cleaning of the vehicle cabin interior is performed. In next step S 82 , the vehicle cleaning handling unit  27  moves the processing to step S 83  when the vehicle cabin interior cleaning estimation unit  28  estimates that the vehicle cabin interior is cleaned, transmits vehicle cabin interior cleaned information indicating that the vehicle cabin interior is cleaned to the vehicle renting system  100 , and moves the processing to step S 66 . 
     On the other hand, when the vehicle cabin interior cleaning estimation unit  28  does not estimate that the vehicle cabin interior is cleaned, the vehicle cleaning handling unit  27  moves the processing from step S 82  to step S 90 , transmits the second vehicle cleaning information CLi 2  for requesting cleaning of the vehicle  10  to the maintenance management server  200  and the vehicle renting system  100 , and moves the processing to step S 66 . Further, in step S 65 , the vehicle cleaning handling unit  27  transmits vehicle cabin interior non-dirty information reporting that the vehicle cabin interior is not dirty to the vehicle renting system  100 . 
     Referring to  FIG. 3 , a first renting fee discounting unit  102  of the vehicle renting system  100  moves the processing to step S 20  when the vehicle cabin interior non-dirty information transmitted from the vehicle control device  20  is received in step S 4  and executes a first renting fee discounting process. The first renting fee discounting process is a process of discounting a renting fee of the vehicle  10  at a first predetermined amount or a first predetermined rate from a regular fee. As described above, the renting fee of the vehicle  10  is discounted, and an incentive to carefully use the vehicle  10  without making the vehicle cabin interior of the vehicle  10  dirty may thereby be given to the user U. 
     Further, a second renting fee discounting unit  103  moves the processing to step S 30  when the vehicle cabin interior cleaned information transmitted from the vehicle control device  20  is received in step S 5  and executes a second renting fee discounting process. The second renting fee discounting process is a process of discounting the renting fee of the vehicle  10  at only a second predetermined amount or a second predetermined rate from the regular fee. As described above, the renting fee of the vehicle  10  is discounted, and an incentive to clean the vehicle cabin interior in returning the vehicle  10  may thereby be given to the user U. Note that the first predetermined amount and the second predetermined amount may be set to the same amount or may be set to different amounts. Also, the first predetermined rate and the second predetermined rate may be set to the same rate or may be set to different rates. For example, the first predetermined amount is set larger than the second predetermined amount, or the first predetermined rate is set higher than the second predetermined rate, and the incentive to use the vehicle  10  without making the vehicle cabin interior of the vehicle  10  dirty may thereby be enhanced. 
     Further, the vehicle renting management unit  101  moves the processing to step S 40  when the second vehicle cleaning information CLi 2  transmitted from the vehicle control device  20  is received in step S 6  and sets a renting prohibited period of the vehicle  10 . The renting prohibited period is set in consideration of a period needed for cleaning of the vehicle cabin interior of the vehicle  10 . In next step S 41 , the vehicle renting management unit  101  prohibits renting of the vehicle  10  until the renting prohibited period elapses. This enables avoidance of a case where a user feels discomfort due to renting of the vehicle  10  in a state where the vehicle cabin interior is dirty. 
     4. Other Embodiments 
     In the above embodiment, the vehicle management system  1  is composed of the vehicle control device  20  and the vehicle renting system  100 ; however, configurations included in the vehicle renting system  100  are incorporated in the vehicle control device  20 , and the vehicle management system  1  may thereby be composed of only the vehicle control device  20 . Further, the vehicle management system  1  may be composed of only the vehicle renting system  100  in which configurations included in the vehicle control device  20  are incorporated. 
     In a case where the vehicle cabin interior information acquisition unit  21  is included in the vehicle renting system  100 , the vehicle cabin interior information acquisition unit  21  acquires pieces of information such as the image of the vehicle cabin interior photographed by the vehicle cabin camera  43 , the odor level in the vehicle cabin detected by the odor sensor  45 , and the sound in the vehicle cabin detected by the microphone  44  by receiving those from the vehicle  10 . Similarly, the vehicle position recognition unit.  23  receives information of the present position of the vehicle  10 , the present position being detected by the automotive navigation system  50 , from the vehicle  10  and thereby recognizes the present position of the vehicle  10 . 
     In the above embodiment, the vehicle renting management unit  101  included in the vehicle renting system  100  sets a non-use period of the vehicle  10 , and the first renting fee discounting unit  102  and the second renting fee discounting unit  103  perform the first renting fee discounting process and the second renting fee discounting process for discounting the renting fee of the vehicle  10 . As another embodiment, any or all of setting of the non-use period, the first renting fee discounting process, and the second renting fee discounting process may be omitted. 
     In the above embodiment, the vehicle renting management unit  101  prohibits renting of the vehicle until the renting prohibited period elapses by processes of step S 40  and step S 41  in  FIG. 3 ; however, those processes may be omitted. Further, whether or not the renting prohibited period is set may be determined in accordance with the factor due to which the second vehicle cleaning information CLi 2  is transmitted. For example, in a case where the user U visits seashore as the predetermined area in fine weather, it is assumed that the vehicle cabin interior does not become very dirty, and the renting prohibited period may thus not be set. In a case of visiting seashore in rainy weather, it is assumed that the vehicle cabin interior becomes very dirty, and the renting prohibited period may thus be set. 
     In the above embodiment, the vehicle cabin interior cleaning estimation unit  28  is provided and estimates whether or not cleaning of the vehicle cabin interior is performed; however, the vehicle cabin interior cleaning estimation unit  28  may be omitted, and the second vehicle cleaning information CLi 2  may unconditionally be transmitted to the maintenance management server  200  when use of the vehicle  10  is finished. In this case, the maintenance management server  200  arranges a check on whether or not dirt is present in the vehicle cabin of the vehicle  10  and handling of cleaning. 
     In the above embodiment, the vehicle cleaning handling unit  27  transmits the first vehicle cleaning information CLI to the user terminal  90  and transmits the second vehicle cleaning information CLi 2  to the maintenance management server  200 . As another embodiment, only either one of the first vehicle cleaning information CLi 1  and the second vehicle cleaning information CLi 2  may be transmitted. 
     In the above embodiment, when the vehicle  10  arrives at the return spot and the power source is turned off in step S 61  in  FIG. 5 , the vehicle cleaning handling unit  27  transmits first vehicle cleaning information to the user terminal in step S 80  in  FIG. 6  and transmits second vehicle cleaning information to the maintenance management server  200  in step S 90 . In this case, the user U checks the first vehicle cleaning information advising cleaning of the vehicle cabin interior after arriving at the return spot, but it is possible that handling of cleaning may not be performed at the return spot. 
     Accordingly, as another embodiment, the first vehicle cleaning information and the second vehicle cleaning information may be transmitted at a timing when the user U sets the destination of movement by the vehicle  10  to the parking lot St as the return spot of the vehicle  10  by the automotive navigation system  50  after the vehicle use situation recognition unit  24  recognizes that the user U visits the predetermined area or the predetermined facility by the vehicle  10  or that the vehicle  10  is used in bad weather. In this case, the user U who has checked the first vehicle cleaning information may stop by a cleaning facility such as a car wash and clean the vehicle cabin interior of the vehicle  10  before arriving at the return spot. Further, the maintenance management server  200  may prepare for cleaning of the vehicle cabin interior of the vehicle  10  before the vehicle  10  arrives at the return spot. Further, when it is recognized that the vehicle  10  stops by the cleaning facility based on the position of the vehicle  10  recognized by the vehicle position recognition unit  23 , the vehicle cabin interior cleaning estimation unit  28  may estimate that the vehicle cabin interior of the vehicle  10  is cleaned. 
     In the above embodiment, the portable user terminal  90  is described; however, a user terminal of the present invention may be in-vehicle equipment that is installed in the vehicle  10 , is used by the user U, and has a function of performing communication with the outside via the communication network  500 . 
     Note that  FIG. 2  is a schematic diagram illustrating the configuration of the vehicle management system  1  by categorizing the configuration in accordance with principal processing contents for easy understanding of the invention of this application, but the configuration of the vehicle management system  1  may be configured based on different categories. Further, processing of each configuration element may be executed by one hardware unit or may be executed by plural hardware units. Further, processing of each configuration element, the processing being illustrated in  FIG. 3  to  FIG. 6 , may be executed by one program or may be executed by plural programs. 
     5. Configurations Supported by Above Embodiments 
     The above embodiments are specific examples of the following configurations. 
     (First Item) A vehicle management system including: a vehicle position recognition unit recognizing a position of a vehicle; a vehicle use situation recognition unit recognizing that a user of the vehicle visits a predetermined area or a predetermined facility by the vehicle based on the position of the vehicle recognized by the vehicle position recognition unit; and a vehicle cleaning handling unit transmitting vehicle cleaning information about cleaning of the vehicle to at least either one of a user terminal and a maintenance management server in a case where the vehicle use situation recognition unit recognizes that the user visits the predetermined area or the predetermined facility by the vehicle, the user terminal being used by the user, the maintenance management server managing maintenance of the vehicle. 
     In the vehicle management system of the first item, the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server when the vehicle use situation recognition unit recognizes that the user visits the predetermined area or the predetermined facility by the vehicle. Accordingly, the user or the maintenance management server is advised to handle cleaning of a vehicle cabin interior, and dirt in a vehicle cabin may thereby be prevented from being left, the dirt occurring when the user visits the predetermined area or the predetermined facility. 
     (Second Item) The vehicle management system according to the first item, further including a weather recognition unit recognizing weather of a spot where the vehicle is positioned, in which the vehicle use situation recognition unit recognizes that the vehicle is used in predetermined weather based on the weather of the spot where the vehicle is positioned, the weather being recognized by the weather recognition unit, and the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server in a case where the vehicle use situation recognition unit recognizes that the vehicle is used in the predetermined weather. 
     In the vehicle management system of the second item, in a case where the vehicle is used in a situation in which dirt in the vehicle cabin is likely to occur due to an influence of weather, the user or the maintenance management server may be advised to clean the vehicle cabin interior. 
     (Third Item) The vehicle management system according to the first item or the second item, further including a power source state recognition unit recognizing a state of a power source provided in the vehicle, in which the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when the power source state recognition unit recognizes that the power source is switched from an ON state to an OFF state after the vehicle use situation recognition unit recognizes that the user of the vehicle visits the predetermined area or the predetermined facility by the vehicle. 
     In the vehicle management system of the third item, the vehicle cleaning information is transmitted at a timing when the power source state recognition unit recognizes that the power source is switched from the ON state to the OFF state and it is assumed that the user finishes use of the vehicle, and the vehicle cleaning information may thereby be prevented from being needlessly transmitted at an inappropriate timing. 
     (Fourth Item) The vehicle management system according to the third item, in which the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when movement of the vehicle from the predetermined area or the predetermined facility is recognized based on the position of the vehicle recognized by the vehicle position recognition unit after the vehicle use situation recognition unit recognizes that the user of the vehicle visits the predetermined area or the predetermined facility by the vehicle and the power source state recognition unit recognizes that the power source is switched from the ON state to the OFF state. 
     In the vehicle management system of the fourth item, in a case where the power source state recognition unit recognizes that the power source is switched from the ON state to the OFF state after the vehicle moves from the predetermined area or the predetermined facility and it is assumed that the user runs errands in the predetermined area or the predetermined facility and finishes use of the vehicle, the vehicle cleaning information may be transmitted. 
     (Fifth Item) A vehicle management system including: a weather recognition unit recognizing weather of a spot where a vehicle is positioned; a vehicle use situation recognition unit recognizing that the vehicle is used in predetermined weather based on the weather of the spot where the vehicle is positioned, the weather being recognized by the weather recognition unit; and a vehicle cleaning handling unit transmitting vehicle cleaning information about cleaning of the vehicle to at least either one of a user terminal and a maintenance management server in a case where the vehicle use situation recognition unit recognizes that the vehicle is used in the predetermined weather, the user terminal being used by the user of the vehicle, the maintenance management server managing maintenance of the vehicle. 
     In the vehicle management system of the fifth item, in a case where the vehicle is used in a situation in which dirt in the vehicle cabin is likely to occur due to an influence of weather, the user or the maintenance management server may be advised to clean the vehicle cabin interior. 
     (Sixth Item) The vehicle management system according to any one of the first item to the fourth item, in which the vehicle is a rented vehicle, the vehicle management system includes a power source state recognition unit recognizing whether a power source provided in the vehicle is in an ON state or an OFF state, and the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when the power source state recognition unit recognizes that the power source is switched from the ON state to the OFF state in a state where the vehicle position recognition unit recognizes that the vehicle stands still at a return spot of the vehicle. 
     In the vehicle management system of the sixth item, the rented vehicle stands still at the return spot, the power source is switched from the ON state to the OFF state, and the vehicle cleaning information may thereby be transmitted at a timing when it is assumed that use of the rented vehicle is finished. 
     (Seventh Item) The vehicle management system according to any one of the first item to the fourth item, in which the vehicle is a rented vehicle, and the vehicle cleaning handling unit transmits the vehicle cleaning information to at least either one of the user terminal and the maintenance management server at a timing when movement of the vehicle from the predetermined area or the predetermined facility is recognized based on the position of the vehicle recognized by the vehicle position recognition unit after the vehicle use situation recognition unit recognizes that the user visits the predetermined area or the predetermined facility by the vehicle and setting of a return spot of the vehicle as a destination of the vehicle is recognized. 
     In the vehicle management system of the seventh item, when it is predicted that the vehicle is dirty because the user visits the predetermined area or the predetermined facility by the vehicle, the user or the maintenance management server may be advised to clean the vehicle or prepare for cleaning of the vehicle on the way to the return spot. 
     (Eighth Item) The vehicle management system according to any one of the first item to the seventh item, in which the vehicle is a rented vehicle, and the vehicle management system includes a vehicle renting management unit prohibiting renting of the vehicle when the vehicle cleaning information is transmitted by the vehicle cleaning handling unit to at least either one of the user terminal and the maintenance management server, until a predetermined renting prohibited period elapses after the vehicle is returned. 
     In the vehicle management system of the eighth item, in a case where it is anticipated that the vehicle cabin interior will be dirty, renting of the vehicle is prohibited until the renting prohibited period elapses after the vehicle is returned, and a time for cleaning the vehicle cabin interior may thereby be secured. 
     (Ninth Item) The vehicle management system according to the eighth item, in which the vehicle renting management unit determines whether or not the renting prohibited period is set in accordance with a factor due to which the vehicle cleaning information is transmitted. 
     In the vehicle management system in the ninth item, whether or not the renting prohibited period is set may be determined in accordance with the degree of dirt in the vehicle cabin, the degree being assumed to be different depending on the factor due to which the vehicle cleaning information is transmitted. 
     (Tenth Item) The vehicle management system according to the eighth item or the ninth item, further including: a vehicle cabin interior information acquisition unit acquiring vehicle cabin interior information indicating a situation in a vehicle cabin of the vehicle; and a vehicle cabin interior cleaning estimation unit estimating that a vehicle cabin interior is cleaned based on the vehicle cabin interior information acquired by the vehicle cabin interior information acquisition unit, in which the vehicle renting management unit does not set the renting prohibited period when the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior is cleaned after the vehicle cleaning handling unit transmits the vehicle cleaning information to the user terminal. 
     In the vehicle management system of the tenth item, when the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior of the vehicle is cleaned, the renting prohibited period is not set, and renting of the vehicle may thereby efficiently be performed. 
     (Eleventh item) The vehicle management system according to the ninth item, in which the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior is cleaned when the vehicle cabin interior cleaning estimation unit recognizes, based on the vehicle cabin interior information, that an occupant is present in the vehicle cabin until a predetermined time elapses after use of the vehicle by the user is finished. 
     In the vehicle management system of the eleventh item, in a case where the occupant is present in the vehicle cabin until the predetermined time elapses after the use of the vehicle is finished, it is determined that the occupant stays in the vehicle cabin to perform cleaning, and it may thereby be estimated that the vehicle cabin interior is cleaned. 
     (Twelfth Item) The vehicle management system according to the ninth item or the tenth item, in which the vehicle cabin interior information acquisition unit acquires, as the vehicle cabin interior information, a load level detected by a load sensor provided to a seat of the vehicle, and the vehicle cabin interior cleaning estimation unit estimates that the vehicle cabin interior is cleaned based on a change in the load level acquired by the vehicle cabin interior information acquisition unit. 
     In the vehicle management system of the twelfth item, it is determined that the occupant cleans the seat based on the load level detected by the load sensor, and it may thereby be estimated that the vehicle cabin interior is cleaned. 
     (Thirteenth Item) The vehicle management system according to the second item, in which the vehicle is a rented vehicle, and the vehicle management system includes a vehicle renting management unit checking a destination planned by the user and predicted weather in a use period of the vehicle when the vehicle renting management unit accepts renting of the vehicle, the vehicle renting management unit prohibiting renting of the vehicle in a case where the destination is the predetermined area or the predetermined facility and the predicted weather in the use period is the predetermined weather. 
     In the vehicle management system of the thirteenth item, in a case where it is assumed that the vehicle cabin interior becomes very dirty because the user visits the predetermined area or the predetermined facility in the predetermined weather, renting of the vehicle is prohibited, and use of the vehicle under a condition in which the vehicle cabin interior highly possibly becomes dirty may thereby be avoided. 
     (Fourteenth Item) A vehicle management method being executed by a vehicle management system, the vehicle management method including: a vehicle position recognition step of recognizing a position of a vehicle; a vehicle use situation recognition step of recognizing that a user of the vehicle visits a predetermined area or a predetermined facility by the vehicle based on the position of the vehicle recognized by the vehicle position recognition step; and a vehicle cleaning handling step of transmitting vehicle cleaning information about cleaning of the vehicle to at least either one of a user terminal and a maintenance management server in a case where a visit to the predetermined area or the predetermined facility by the user by the vehicle is recognized by the vehicle use situation recognition step, the user terminal being used by the user, the maintenance management server managing maintenance of the vehicle. 
     The vehicle management method of the fourteenth item is executed by a vehicle management system, and a configuration of the vehicle management system of the first item may thereby be realized. 
     REFERENCE SIGNS LIST 
     
         
           1  vehicle management system 
           10  vehicle 
           20  vehicle control device 
           21  vehicle cabin interior information acquisition unit 
           22  dirt factor element recognition unit 
           23  vehicle position recognition unit 
           24  vehicle use situation recognition unit 
           25  weather recognition unit 
           26  power source state recognition unit 
           27  vehicle cleaning handling unit 
           28  vehicle cabin interior cleaning estimation unit 
           30  memory 
           43  vehicle cabin camera 
           44  microphone 
           45  odor sensor 
           46  load sensor 
           47  rain sensor 
           48  start switch 
           50  automotive navigation system 
           60  battery 
           90  user terminal 
           100  vehicle renting system 
           101  vehicle renting management unit 
           102  first renting fee discounting unit 
           103  second renting fee discounting unit 
           110  rented vehicle DB 
           200  maintenance management server 
           300  weather information server 
         U user 
         K child