Monitoring device, monitoring method, monitoring program, and monitoring system

Abstract

An on-vehicle device (10-4A) sets a caution level, detects a suspicious person among monitoring objects on the basis of the set caution level, estimates the intention of the detected suspicious person, designates a caution range on the basis of the estimated intention of the suspicious person SP, and transmits caution-needed information, which is information for requesting a change in the caution level, to the outside for another on-vehicle device (10-4B) located within the caution range.

Description

Monitoring device, monitoring method, monitoring program, and monitoring system 【0001】 This invention relates to a monitoring device, a monitoring method, a monitoring program, and a monitoring system. 【0002】 Conventionally, when a vehicle is targeted by theft or other crimes, technologies have been known to increase security by sending warning emails to owners of vehicles within a predetermined range of the affected area, or by controlling the sounding of horns or the illumination of headlights to deter theft (for example, Patent Document 1). 【0003】 Japanese Patent Publication No. 2007-126118 【0004】 However, the conventional technology described above has room for improvement in preventing the escalation of damage caused by suspicious individuals to moving objects. For example, when a suspicious individual, such as a car thief, travels on foot or by vehicle, the actual time it takes for the suspicious individual to reach their destination will differ depending on whether or not they need to take a significant detour due to topographical factors such as rivers, even if the straight-line distance is the same. In other words, with the conventional technology described above, even if the location is far away or takes a long time for the suspicious individual to reach, the owner of a vehicle located within a predetermined range will receive a warning notification, which may unnecessarily increase anxiety. 【0005】 The present invention has been made in view of the above, and aims to provide a monitoring device, monitoring method, monitoring program, and monitoring system that can prevent the escalation of damage caused by suspicious individuals to moving objects. 【0006】 To solve the above-mentioned problems and achieve the objective, the monitoring device according to the present invention is characterized by comprising: a control unit for setting an alert level; a detection unit for detecting suspicious persons targeting a monitoring target according to criteria corresponding to the set alert level; an estimation unit for estimating the purpose of the detected suspicious person; an identification unit for identifying an alert range based on the estimated purpose of the suspicious person; and a transmission unit for transmitting alert information, which is information requesting a change in the alert level to other monitoring devices located within the alert range, to the outside. 【0007】Furthermore, the monitoring method according to the present invention is a monitoring method performed by a monitoring device installed on a target to be monitored, and is characterized by including: a detection step of detecting a suspicious person to the target to be monitored according to a set alert level; an estimation step of estimating the purpose of the detected suspicious person; a specification step of identifying an alert range based on the estimated purpose of the suspicious person; and a transmission step of transmitting alert information, which is information requesting a change in the alert level to other monitoring devices located within the alert range, to an external party. 【0008】 Furthermore, the monitoring program according to the present invention is a monitoring program to be executed by a monitoring device installed on a target to be monitored, and is characterized by including: a detection procedure for detecting a suspicious person to the target to be monitored according to a set alert level; an estimation procedure for estimating the purpose of the detected suspicious person; an identification procedure for identifying an alert range based on the estimated purpose of the suspicious person; and a transmission procedure for transmitting alert information, which is information requesting a change in the alert level to other monitoring devices located within the alert range, to an external party. 【0009】 Furthermore, the monitoring system according to the present invention is a monitoring system comprising a plurality of monitoring devices installed for each of a plurality of monitoring targets, wherein each of the plurality of monitoring devices comprises: a detection unit that detects suspicious persons to the monitoring target according to a set alert level; an estimation unit that estimates the purpose of the detected suspicious person; a specification unit that identifies an alert range based on the estimated purpose of the suspicious person; and a transmission unit that transmits alert information, which is information requesting a change in the alert level to other monitoring devices located within the alert range, to the outside. 【0010】Figure 1 is a diagram showing an example of the configuration and processing of a security system according to Embodiment 1. Figure 2 is a block diagram showing an example of the configuration of a security system according to Embodiment 1. Figure 3 is a block diagram showing an example of the configuration of an in-vehicle device of the security system according to Embodiment 1. Figure 4 is a diagram showing an example of the user information storage unit of the in-vehicle device according to Embodiment 1. Figure 5 is a diagram showing an example of the suspicious person information storage unit of the in-vehicle device according to Embodiment 1. Figure 6 is a diagram showing an example of the alert level storage unit of the in-vehicle device according to Embodiment 1. Figure 7 is a flowchart showing an example of the processing flow of a security system according to Embodiment 1. Figure 8 is a diagram showing an example of the configuration and processing of a security system according to Embodiment 2. Figure 9 is a block diagram showing an example of the configuration of an in-vehicle device of the security system according to Embodiment 2. Figure 10 is a diagram showing an example of the mobility means storage unit of the in-vehicle device according to Embodiment 2. Figure 11 is a flowchart showing an example of the processing flow of a security system according to Embodiment 2. Figure 12 is a diagram showing an example of the configuration and processing of a security system according to Embodiment 3. Figure 13 is a block diagram showing an example of the configuration of an in-vehicle device of the security system according to Embodiment 3. Figure 14 is a diagram showing an example of the crime purpose storage unit of the in-vehicle device according to Embodiment 3. Figure 15 is a flowchart showing an example of the processing flow of a security system according to Embodiment 3. Figure 16 is a diagram showing an example of the configuration and processing of a security system according to Embodiment 4. Figure 17 is a block diagram showing an example of the configuration of an in-vehicle device of the security system according to Embodiment 4. Figure 18 is a diagram showing an example of a warning information storage unit of an in-vehicle device according to Embodiment 4. Figure 19 is a flowchart showing an example of the processing flow of a security system according to Embodiment 4. Figure 20 is a hardware configuration diagram showing an example of a computer that realizes the functions of the in-vehicle devices of Embodiments 1 to 4. 【0011】 Embodiments 1 to 4 of the monitoring device, monitoring method, monitoring program, and monitoring system according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to Embodiments 1 to 4 described below. 【0012】[Embodiment 1] The configuration and processing of the security system 100-1 according to Embodiment 1, the configuration and processing of the in-vehicle device 10-1 of the security system 100-1, the processing flow of the security system 100-1, and the effects of Embodiment 1 will be described below. 【0013】 [Configuration and Processing of Security System 100-1] The configuration and processing of security system 100-1 according to Embodiment 1 will be described using Figure 1. Figure 1 is a diagram showing an example of the configuration and processing of security system 100-1 according to Embodiment 1. Below, an example of the overall configuration of security system 100-1, an example of the processing of security system 100-1, and the effects of security system 100-1 will be described. 【0014】 (1. Example of Security System 100-1 Configuration) The security system 100-1 shown in Figure 1 has on-board devices 10-1 (10-1A, 10-1B, ...) which are each mounted on multiple vehicles V (VA, VB, ...). 【0015】Here, the in-vehicle device 10-1 is a terminal that performs information sharing, etc., among multiple vehicles V (VA, VB, ...), which are an example of a mobile body, and is implemented, for example, using serverless computing. The in-vehicle device 10-1 can also perform information sharing, etc., among multiple vehicles V (VA, VB, ...) via a server device (not shown) such as a cloud system. In the following description, an example in which the mobile body is a vehicle is described, but the mobile body is not limited to a vehicle. Furthermore, the technology related to the security system 100-1 can be applied to various products. For example, the technology related to the security system 100-1 may be implemented as a device mounted on any type of mobile body such as an automobile, electric vehicle, hybrid electric vehicle, motorcycle, bicycle, personal mobility device, airplane, drone, ship, or robot. In the following description, "in-vehicle device 10-1" may be used to refer to multiple or the entire in-vehicle device 10-1. Also, "in-vehicle device 10-1'" may be used to refer to an in-vehicle device 10-1 that is different from a specific in-vehicle device 10-1. Additionally, "Vehicle V" may be used to refer to multiple or all vehicles V. Furthermore, "Vehicle V'" may be used to refer to a vehicle V that is different from a specific vehicle V. 【0016】 (2. Example of processing by security system 100-1) Firstly, the on-board device 10-1A installed in the vehicle VA detects a suspicious person SP in relation to the parked vehicle VA (step S11). Here, a suspicious person SP is a person other than the owner, driver, or passenger U of the vehicle V who approaches, scouts, or enters the parked vehicle V without the permission of the user U. For example, the on-board device 10-1A detects a person who does not possess the electronic key of the parked vehicle VA and approaches the parked vehicle VA within a predetermined distance, looks into the vehicle for a predetermined time or longer, or enters the vehicle. 【0017】Secondly, the on-board device 10-1A mounted on vehicle VA transmits suspicious person information to the on-board device 10-1B mounted on vehicle VB located within a predetermined travel distance from the on-board device 10-1A (step S12). Here, suspicious person information refers to information indicating that a suspicious person SP has been detected in vehicle V, and includes the detection date and time and the detection result. The detection result also includes the type of suspicious activity such as approach, reconnaissance, or intrusion, the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP taken by the on-board device 10-1. For example, if the predetermined travel distance, which is the alert range for the suspicious person SP, is set to 5 km, the on-board device 10-1A estimates multiple possible travel routes from the parking position of vehicle VA, and transmits suspicious person information to the on-board device 10-1B mounted on vehicle VB located within 5 km (e.g., shortest distance, average distance) when traveling along the estimated multiple travel routes. 【0018】 Thirdly, the on-board device 10-1B mounted on the vehicle VB controls the alert level set in the on-board device 10-1B (step S13). Here, the alert level refers to detection settings related to the detection of suspicious persons SP in the vehicle V (e.g., proximity detection setting, reconnaissance detection setting, intrusion detection setting), and travel distance settings related to a predetermined travel distance which is the alert range for transmitting suspicious person information. For example, when the on-board device 10-1B receives suspicious person information from the on-board device 10-1A, it performs control to raise the alert level set in the on-board device 10-1B. At this time, the on-board device 10-1B can also perform control that does not change the alert level, prioritizing the setting by the user U. 【0019】 (3. Effects of Security System 100-1) As described above, the security system 100-1 performs the following processes. First, the onboard device 10-1A installed in vehicle VA detects a suspicious person SP in relation to the parked vehicle VA. Second, the onboard device 10-1A installed in vehicle VA transmits information about the suspicious person to the onboard device 10-1B installed in vehicle VB located within the surveillance range of the onboard device 10-1A. Third, the onboard device 10-1B installed in vehicle VB controls the surveillance level set in the onboard device 10-1B. 【0020】Therefore, the security system 100-1 has the following effects. Firstly, the security system 100-1 can share information about suspicious persons SP between vehicles V located within a predetermined travel distance along a travel route that takes topographical factors into consideration. Secondly, each time a suspicious person SP is detected in a vehicle V, the security system 100-1 can expand the alert area for the suspicious person SP in an amoeba-like manner. In other words, the security system 100-1 can prevent the damage caused by suspicious persons SP to moving objects such as vehicles V from spreading. 【0021】 [Configuration and Processing of the In-Vehicle Device 10-1 of the Security System 100-1] The configuration and processing of the in-vehicle device 10-1 of the security system 100-1 according to Embodiment 1 will be described using Figures 2 to 7. Below, an example of the overall configuration of the security system 100-1 according to Embodiment 1 will be described, followed by an example of the configuration and processing of the in-vehicle device 10-1 according to Embodiment 1. 【0022】 (1. Example of the overall configuration of security system 100-1) An example of the overall configuration of security system 100-1 according to Embodiment 1 will be described using Figure 2. Figure 2 is a block diagram showing an example of the configuration of security system 100-1 according to Embodiment 1. As shown in Figure 2, security system 100-1 has in-vehicle devices 10-1 (10-1A, 10-1B, 10-1C, ...) which are each mounted on a plurality of vehicles V (VA, VB, VC, ...). Each of the in-vehicle devices 10-1 (10-1A, 10-1B, 10-1C, ...) is realized by serverless computing such as B5G (Beyond 5th Generation), and can perform information sharing, etc., among the plurality of vehicles V (VA, VB, VC, ...). In addition, each of the in-vehicle devices 10-1 (10-1A, 10-1B, 10-1C, ...) may be connected to a server device (not shown) such as a cloud system via a predetermined communication network. Furthermore, various communication networks such as the internet and dedicated lines can be used as the designated communication network. 【0023】(2. Configuration Examples and Processing Examples of On-board Device 10-1) Configuration examples and processing examples of the on-board device 10-1 will be explained using Figure 3. Figure 3 is a block diagram showing a configuration example of the on-board device 10-1 of the security system 100-1 according to Embodiment 1. The on-board device 10-1 is a terminal mounted on a mobile vehicle. For example, the on-board device 10-1 may be an on-board device 10-1A mounted on vehicle VA, an on-board device 10-1B mounted on vehicle VB, an on-board device 10-1C mounted on vehicle VC, etc. 【0024】 As shown in Figure 3, the in-vehicle device 10-1 includes a communication unit 11, a storage unit 12-1, and an overall control unit 13. The in-vehicle device 10-1 may also include an input unit (e.g., a touch panel) for receiving various operations from the owner of the in-vehicle device 10-1, and a display unit (e.g., a liquid crystal display) for displaying various information. 【0025】 The in-vehicle device 10-1 is, for example, a dedicated terminal mounted on a vehicle V, and consists of a navigation device and a recording device (drive recorder). As one example, the in-vehicle device 10-1 may be a complex device in which an independent navigation device and a recording device are connected in a communicative manner. As another example, the in-vehicle device 10-1 may be a single device having navigation and recording functions. Furthermore, the in-vehicle device 10-1 may be a device that can be carried by the user U. 【0026】 Furthermore, the in-vehicle device 10-1 may be equipped with various sensors. For example, the in-vehicle device 10-1 may have various sensors such as a camera, motion sensor, acceleration sensor, gyro sensor, GPS (Global Positioning System) sensor, and barometric pressure sensor. 【0027】 (2-1. Communication Unit 11) The communication unit 11 is implemented by, for example, a NIC (Network Interface Card). The communication unit 11 is connected to a predetermined communication network by wire or wireless and transmits and receives information with various devices. 【0028】(2-2. Memory Unit 12-1) The memory unit 12-1 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory), a flash memory, or a storage device such as a hard disk or an optical disk. As shown in FIG. 3, the memory unit 12-1 according to Embodiment 1 has a user information memory unit 12a, a suspicious person information memory unit 12b, and a warning level memory unit 12c. Then, the memory unit 12-1 stores various information that the overall control unit 13 refers to when operating and various information obtained when the overall control unit 13 operates. 【0029】 (2-2-1. User Information Memory Unit 12a) The user information memory unit 12a stores user information input by a user U who is the owner of the vehicle V or the like. Further, the user information memory unit 12a stores user information received by a reception unit 13e described later. Also, the user information memory unit 12a stores user information detected by a detection unit 13a described later. Here, an example of the information stored in the user information memory unit 12a will be described using FIG. 4. FIG. 4 is a diagram showing an example of the user information memory unit 12a of the in-vehicle device 10-1 according to Embodiment 1. In the example of FIG. 4, the user information memory unit 12a has items such as "user ID", "user attribute", "history information", and "location information". 【0030】 "User ID" indicates identification information for identifying the user U. "User attribute" is information that contributes to the classification of the pre-registered user U, and includes, for example, the name, gender, age, age group, occupation, annual income, place of residence, married / unmarried status, presence or absence of children, moving image of the user U, categories in which the user U is interested, and other information. "History information" is information such as a search history, a browsing history, a purchase history, a movement history, and a communication history. "Location information" is information indicating the current location, moving speed, moving means, etc. of the vehicle V detected by the in-vehicle device 10-1. 【0031】 In FIG. 4, an example is shown in which user information with a user attribute of "user attribute #1", history information of "history information #1", and location information of "location information #1" is stored in the user information memory unit 12a for the user U identified by the user ID "UID#1". 【0032】 (2-2-2. Suspicious Person Information Storage Unit 12b) The suspicious person information storage unit 12b stores the suspicious person information detected by the detection unit 13a described later. Here, an example of the information stored in the suspicious person information storage unit 12b will be described using FIG. 5. FIG. 5 is a diagram showing an example of the suspicious person information storage unit 12b of the in-vehicle device 10-1 according to Embodiment 1. In the example of FIG. 5, the suspicious person information storage unit 12b has items such as "user ID", "detection date and time", and "detection result". 【0033】 "User ID" indicates identification information for identifying the user U. "Detection date and time" indicates the date and time when the suspicious person SP was detected. "Detection result" is the type of suspicious behavior of the suspicious person SP (e.g., approach, surveillance, intrusion), the position information of the vehicle V, the vehicle type of the vehicle V, the image data of the suspicious person SP captured by the in-vehicle device 10-1, and the like. 【0034】 In FIG. 5, for the vehicle V of the user U identified by the user ID "UID#1", the suspicious person information {detection date and time: "detection date and time#1-1", detection result: "detection result#1-1"}, {detection date and time: "detection date and time#1-2", detection result: "detection result#1-2"}, {detection date and time: "detection date and time#1-3", detection result: "detection result#1-3"},... is shown as an example stored in the suspicious person information storage unit 12b. 【0035】 (2-2-3. Alert Level Storage Unit 12c) The alert level storage unit 12c stores the alert level set by the user U who is the owner of the vehicle V or the like. The alert level storage unit 12c also stores the alert level changed by the control unit 13f described later. Here, an example of the information stored in the alert level storage unit 12c will be described using FIG. 6. FIG. 6 is a diagram showing an example of the alert level storage unit 12c of the in-vehicle device 10-1 according to Embodiment 1. In the example of FIG. 6, the alert level storage unit 12c has items such as "user ID", "alert range", and "detection setting". 【0036】"User ID" indicates identification information for identifying user U. "Warning Range" indicates the range within which suspicious person information is shared between in-vehicle devices 10-1 set for each vehicle V. For example, this could be a predetermined value for the distance traveled when moving along a travel route such as a sidewalk or roadway in a certain amount of time, or a predetermined value for the time traveled when moving along a travel route at a constant speed. The "Warning Range" may also include information such as whether to select the shortest distance or the average distance when there are multiple travel routes. "Detection Setting" indicates the degree of detection of suspicious person SP set for each vehicle V. For example, this could be a proximity detection setting that detects a person approaching a parked vehicle V within a predetermined distance, a reconnaissance detection setting that detects a person peering into the vehicle for a predetermined amount of time or longer, or an intrusion detection setting that detects a person entering the vehicle. 【0037】 Figure 6 shows an example in which, for a vehicle V belonging to user U, identified by user ID "UID#1", the alert level is stored in the alert level storage unit 12c, with the alert range being "Alert Range #1", the detection setting being "Detection Setting #1", and so on. 【0038】 (2-3. Overall Control Unit 13) The overall control unit 13 is implemented by, for example, a CPU (Central Processing Unit) or MPU (Micro Processing Unit) executing various programs (corresponding to an example of an information processing program) stored in the memory device inside the in-vehicle device 10-1 using RAM as the working area. Alternatively, the overall control unit 13 can be implemented by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or FPGA (Field Programmable Gate Array). 【0039】 As shown in Figure 3, the overall control unit 13 includes a detection unit 13a, an estimation unit 13b, a specific unit 13c, a transmission unit 13d, a reception unit 13e, and a control unit 13f, and realizes or executes the information processing functions and operations described below. Note that the internal configuration of the overall control unit 13 is not limited to the configuration shown in Figure 3, and other configurations are also acceptable as long as they perform the information processing described later. 【0040】(2-3-1. Detection Unit 13a) The detection unit 13a detects various types of information. The detection unit 13a stores the detected information in the storage unit 12-1. 【0041】 The detection unit 13a detects suspicious persons SPs (security personnel) in relation to a moving vehicle V. For example, the detection unit 13a detects the approach of a suspicious person SP to a vehicle V equipped with an in-vehicle device 10-1, which is a terminal. The detection unit 13a also detects reconnaissance by a suspicious person SP towards a vehicle V equipped with an in-vehicle device 10-1. The detection unit 13a also detects the intrusion of a suspicious person SP into a vehicle V equipped with an in-vehicle device 10-1. Furthermore, the detection unit 13a detects suspicious persons SPs using detection settings controlled by the control unit 13f. The detection unit 13a can also detect the type of suspicious activity, such as approach, reconnaissance, or intrusion, the location information of the vehicle V, the type of vehicle V, and image data of the suspicious person SPs captured by the in-vehicle device 10-1. The detection unit 13a stores the suspicious person information related to the detected suspicious person SPs in the suspicious person information storage unit 12b. 【0042】 (2-3-2. Estimation Unit 13b) The estimation unit 13b estimates various types of information. The estimation unit 13b stores the estimated information in the storage unit 12-1. The estimation unit 13b also refers to the information stored in the storage unit 12-1. 【0043】 The estimation unit 13b estimates the travel route from vehicle V equipped with the in-vehicle device 10-1 to vehicle V' equipped with another in-vehicle device 10-1'. The estimation unit 13b also selects a travel route using the received weather information. The estimation unit 13b also selects a travel route using the received traffic information. Furthermore, the estimation unit 13b estimates the attributes (e.g., gender, age) of the detected suspicious person SP using the image data of the suspicious person SP. 【0044】 (2-3-3. Identification Unit 13c) The identification unit 13c identifies various types of information. The identification unit 13c stores the identified information in the storage unit 12-1. The identification unit 13c also refers to the information stored in the storage unit 12-1. 【0045】The identification unit 13c identifies the location of other in-vehicle devices 10-1'. For example, the identification unit 13c receives location information transmitted from other in-vehicle devices 10-1' and identifies the location of the other in-vehicle devices 10-1' on a map. At this time, the identification unit 13c can also receive location information transmitted from a server device that manages the location information of in-vehicle devices 10-1 and identify the location of the other in-vehicle devices 10-1' on a map. 【0046】 (2-3-4. Transmitting Unit 13d) The transmitting unit 13d transmits various types of information. The transmitting unit 13d also refers to the various types of information stored in the storage unit 12-1. 【0047】 When the detection unit 13a detects a suspicious person SP, the transmission unit 13d transmits suspicious person information about the suspicious person SP to another in-vehicle device 10-1' located within a predetermined travel distance from the in-vehicle device 10-1. For example, the transmission unit 13d transmits suspicious person information to another in-vehicle device 10-1' where the travel distance when traveling along the estimated travel path is less than or equal to a predetermined value, which is the predetermined travel distance. The transmission unit 13d also transmits suspicious person information to another in-vehicle device 10-1' where the travel distance when traveling along the shortest of multiple estimated travel paths is less than or equal to a predetermined value, which is the predetermined travel distance. Furthermore, the transmission unit 13d transmits suspicious person information to another in-vehicle device 10-1' where the average value of the travel distances when traveling along multiple estimated travel paths is less than or equal to a predetermined value, which is the predetermined travel distance. Furthermore, when the in-vehicle device 10-1 detects a suspicious person SP, the transmitting unit 13d transmits information about the suspicious person to another in-vehicle device 10-1' located within a controlled predetermined travel distance. The transmitting unit 13d also transmits information about the suspicious person, including the type of suspicious activity by the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP captured by the in-vehicle device 10-1. At this time, the transmitting unit 13d refers to the suspicious person information stored in the suspicious person information storage unit 12b. The transmitting unit 13d can also refer to the user information stored in the user information storage unit 12a. 【0048】(2-3-5. Receiving Unit 13e) The receiving unit 13e receives various types of information. The receiving unit 13e stores the received information in the storage unit 12-1. 【0049】 The receiving unit 13e receives suspicious person information transmitted from other in-vehicle devices 10-1'. The receiving unit 13e also receives location information transmitted from other in-vehicle devices 10-1'. Furthermore, the receiving unit 13e can also store suspicious person information transmitted from other in-vehicle devices 10-1' in the suspicious person information storage unit 12b. 【0050】 (2-3-6. Control Unit 13f) The control unit 13f performs various controls. The control unit 13f also refers to various information stored in the storage unit 12-1. 【0051】 When the control unit 13f receives suspicious person information transmitted from another in-vehicle device 10-1', it controls the alert level set on the in-vehicle device 10-1 based on the suspicious person information. For example, if the user U of vehicle V has permitted a change in the alert level, the control unit 13f raises the alert level set on the in-vehicle device 10-1 to a higher level. Also, if the user U of vehicle V has not permitted a change in the alert level, the control unit 13f maintains the alert level set on the in-vehicle device 10-1. Furthermore, the control unit 13f controls the detection settings related to the detection of suspicious person SPs for vehicle V equipped with the in-vehicle device 10-1 as an alert level. Furthermore, the control unit 13f controls the detection settings related to the detection of approach, reconnaissance, and intrusion of suspicious person SPs for vehicle V equipped with the in-vehicle device 10-1 as an alert level. Furthermore, the control unit 13f controls a predetermined travel distance set on the in-vehicle device 10-1 as an alert level. Furthermore, the control unit 13f controls a predetermined travel distance set in the in-vehicle device 10-1 as an alert level, according to the attributes of the estimated suspicious person SP. The control unit 13f also controls the alert level according to the actions of the suspicious person SP indicated by the suspicious person information (e.g., approach, reconnaissance, intrusion). Furthermore, the control unit 13f controls the alert level according to the type of vehicle V that detected the suspicious person SP indicated by the suspicious person information (e.g., specific vehicle type). 【0052】(3. Specific Examples of Each Process of Security System 100-1) Specific examples of each process of security system 100-1 according to Embodiment 1 will be described below. Specific examples of the suspicious person detection process, suspicious person information transmission process, and alert level control process of security system 100-1 according to Embodiment 1 will be described below. 【0053】 (3-1. Specific Examples of Suspicious Person Detection Process) The suspicious person detection process of the security system 100-1 according to Embodiment 1 will be described below. The following description will focus on the cases where there is an on-board device 10-1A mounted on vehicle VA, an on-board device 10-1B mounted on vehicle VB, an on-board device 10-1C mounted on vehicle VC, and an on-board device 10-1D mounted on vehicle VD. 【0054】 The on-board device 10-1A installed in the vehicle VA has the following detection settings: {"Proximity detection setting: Off, "Reconnaissance detection setting": On, "Intrusion detection setting": On"}. Furthermore, the on-board device 10-1A is configured not to activate or change its detection function if there are passengers (occupants) present. The motion sensor in the on-board device 10-1A detects that there are no passengers inside the vehicle VA. In this case, the on-board device 10-1A activates its detection function because there are no passengers present. That is, the on-board device 10-1A does not detect the "approach" of a suspicious person (SP) if a person passes by the vehicle VA. On the other hand, if a person peers into the vehicle VA, the on-board device 10-1A detects the "reconnaissance" of a suspicious person (SP) and will emit a warning sound or start recording with its camera. Furthermore, if a person enters the vehicle VA, the in-vehicle device 10-1A detects the "intrusion" of a suspicious person SP and emits a warning sound or starts recording with the camera. 【0055】The on-board device 10-1B installed in vehicle VB has the following detection settings: {"Approach detection setting: Off, "Reconnaissance detection setting": On, "Intrusion detection setting": On"}. Furthermore, the on-board device 10-1B is configured to activate and modify its detection function even if a person is present. The motion sensor of the on-board device 10-1B indicates that there is no person present inside vehicle VB. In this case, the on-board device 10-1B always activates its detection function regardless of the presence of a person. In other words, the on-board device 10-1B does not detect the "approach" of a suspicious person SP if a person passes by the vicinity of vehicle VB. On the other hand, if a person peers into the interior of vehicle VB, the on-board device 10-1B detects the "reconnaissance" of a suspicious person SP and will emit a warning sound or start taking pictures with its camera. Furthermore, if a person enters the vehicle VB, the in-vehicle device 10-1B detects the "intrusion" of a suspicious person SP and emits a warning sound or starts recording with the camera. 【0056】 The on-board device 10-1C installed in the vehicle VC has the following detection settings: {"Proximity detection setting: Off, "Reconnaissance detection setting": On, "Intrusion detection setting": On"}. Furthermore, the on-board device 10-1C is configured not to activate or change its detection function if a person is present. The motion sensor of the on-board device 10-1C detects that a person is present inside the vehicle VC. In this case, the on-board device 10-1C does not activate its detection function because a person is present. In other words, the on-board device 10-1C does not detect the "approach" of a suspicious person SP even if a person passes by the vehicle VC. Furthermore, the on-board device 10-1C does not detect the "reconnaissance" of a suspicious person SP even if a person looks into the vehicle VC. Furthermore, the on-board device 10-1C does not detect the "intrusion" of a suspicious person SP even if a person enters the vehicle VC. 【0057】The on-board device 10-1D installed in the vehicle VD has the following detection settings: {"Proximity detection setting: On, "Reconnaissance detection setting": On, "Intrusion detection setting": On"}. The on-board device 10-1D is also configured not to activate or change its detection function if a person is present. Furthermore, the motion sensor of the on-board device 10-1D indicates that there are no persons (occupants) present inside the vehicle VD. In this case, the on-board device 10-1D activates its detection function because there are no persons present. In other words, if a person passes by the vehicle VD, the on-board device 10-1D detects the "approach" of a suspicious person SP and emits a warning sound or starts recording with its camera. Also, if a person peers into the interior of the vehicle VD, the on-board device 10-1D detects "reconnaissance" by a suspicious person SP and emits a warning sound or starts recording with its camera. Furthermore, if a person enters the vehicle VD, the in-vehicle device 10-1D detects the "intrusion" of a suspicious person SP and emits a warning sound or starts recording with the camera. 【0058】 As described above, the in-vehicle device 10-1 installed in the vehicle V enables flexible suspicious person detection processing depending on the detection settings set in advance by the user U and whether or not the detection function is activated when there is a waiting person. 【0059】 (3-2. Specific Example of Suspicious Person Information Transmission Process) The suspicious person information transmission process of the security system 100-1 according to Embodiment 1 will be described below. The following describes the on-board devices 10-1A mounted on vehicle VA, on-board devices 10-1B mounted on vehicle VB, on-board devices 10-1C mounted on vehicle VC, and on-board devices 10-1D mounted on vehicle VD after the execution of the suspicious person detection process described in (3-1. Specific Example of Suspicious Person Detection Process) above. 【0060】 Firstly, if a person peers into the interior of the vehicle VA, the in-vehicle device 10-1A detects the "reconnaissance" by a suspicious person SP and emits a warning sound or starts taking pictures with its camera. 【0061】Secondly, the in-vehicle device 10-1A identifies the locations of in-vehicle devices 10-1B, 10-1C, and 10-1D, and estimates the travel route from vehicle VA to vehicle VB, from vehicle VA to vehicle VC, and from vehicle VA to vehicle VD. At this time, the in-vehicle device 10-1A may receive weather information and estimate a travel route that takes detours into consideration based on information such as road closures due to bad weather. Alternatively, the in-vehicle device 10-1A may receive traffic information and estimate a travel route that takes detours into consideration based on information such as road closures due to construction and traffic congestion. 【0062】 Thirdly, the in-vehicle device 10-1A estimates, for example, that the travel distance from vehicle VA to vehicle VB is 2 km, the travel distance from vehicle VA to vehicle VC is 3 km, and the travel distance from vehicle VA to vehicle VD is 6 km. In this case, if there are multiple travel routes, the in-vehicle device 10-1A estimates the shortest distance among the multiple travel routes or the average distance of the multiple travel routes as the travel distance. 【0063】 Fourth, if the predetermined travel distance, which is the set surveillance range, is 5 km, the in-vehicle device 10-1A transmits suspicious person information to in-vehicle devices 10-1B and 10-1C, which are located within 5 km of the travel route from the in-vehicle device 10-1A. At this time, the in-vehicle device 10-1A transmits the type of suspicious activity of the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP taken by the in-vehicle device 10-1A. The in-vehicle device 10-1A may also estimate the attributes of the suspicious person SP, such as gender and age, based on the image data of the suspicious person SP and transmit this as suspicious person information. 【0064】 As described above, the on-board device 10-1 installed in vehicle V enables the transmission of suspicious person information that takes geographical factors into consideration, based on the distance traveled along the vehicle V's travel path where the suspicious person SP was detected. 【0065】(3-3. Specific Examples of Alert Level Control Processing) The alert level control processing of the security system 100-1 according to Embodiment 1 will be described below. The following describes the on-board devices 10-1A mounted on vehicle VA, 10-1B mounted on vehicle VB, 10-1C mounted on vehicle VC, and 10-1D mounted on vehicle VD after the execution of the suspicious person detection processing described in (3-1. Specific Examples of Suspicious Person Detection Processing) and the suspicious person information transmission processing described in (3-2. Specific Examples of Suspicious Person Information Transmission Processing). 【0066】 Since there is no standby person present, the in-vehicle device 10-1A can activate and modify its detection function. Specifically, the in-vehicle device 10-1A detects the "reconnaissance" of a suspicious person SP, transmits information about the suspicious person to in-vehicle devices 10-1B and 10-1C, and raises the alert level by setting the detection settings to {"Approach detection setting: On, "Reconnaissance detection setting": On, "Intrusion detection setting": On"}. Alternatively, the in-vehicle device 10-1A may raise the alert level by, for example, changing the predetermined travel distance, which is the set alert range, to 6 km. 【0067】 The in-vehicle device 10-1B always has its detection function activated, regardless of the presence of a standby person, and its settings can be changed at any time. Specifically, the in-vehicle device 10-1B receives information about suspicious persons from the in-vehicle device 10-1A and raises the alert level by setting the detection settings to {"Approach detection setting: On, "Reconnaissance detection setting": On, "Intrusion detection setting": On"}. 【0068】 The in-vehicle device 10-1C does not activate its detection function and cannot be modified because there is a standby person present. In other words, the in-vehicle device 10-1C receives suspicious person information from the in-vehicle device 10-1A, but maintains the alert level. On the other hand, the in-vehicle device 10-1C stores the suspicious person information in memory, etc., and when it detects that there is no longer a standby person, it activates its detection function and makes it modifiable. 【0069】Since there are no standby personnel, the in-vehicle device 10-1D can activate its detection function and change its level. On the other hand, since the in-vehicle device 10-1D has not received any information about suspicious persons from the in-vehicle device 10-1A, it does not change the alert level. Even if the in-vehicle device 10-1D were to receive information about suspicious persons from the in-vehicle device 10-1A, it would maintain the alert level because it is already at its maximum level. 【0070】 Each of the in-vehicle devices 10-1 (10-1A, 10-1B, 10-1C, 10-1D) can also control the alert level according to the attributes of the estimated suspicious person SP, such as gender and age. For example, each of the in-vehicle devices 10-1 sets a wider alert range by changing the predetermined travel distance to be longer when the suspicious person SP is male than when it is female. Also, each of the in-vehicle devices 10-1 sets a wider alert range by changing the predetermined travel distance to be longer when the suspicious person SP is between 10 and 40 years old than when it is 50 years old or older. 【0071】 In other words, each in-vehicle device 10-1 that detects a suspicious person SP can also control the alert level of other in-vehicle devices 10-1' within the alert range by transmitting the estimated attributes of the suspicious person SP, such as gender and age, as suspicious person information. 【0072】 Each of the vehicle-mounted devices 10-1 (10-1A, 10-1B, 10-1C, 10-1D) can also control the alert level according to the type of action taken by the suspicious person SP. For example, each of the vehicle-mounted devices 10-1 sets more actions to be detected by turning on more detection settings than in the case of approach or reconnaissance when the suspicious person SP is intruding. Also, each of the vehicle-mounted devices 10-1 sets a wider alert range by changing the predetermined travel distance to a longer duration than in the case of approach or reconnaissance when the suspicious person SP is intruding. 【0073】In other words, each in-vehicle device 10-1 that detects a suspicious person SP can also control the alert level of other in-vehicle devices 10-1' within the alert range by transmitting the estimated type of behavior of the suspicious person SP as suspicious person information. 【0074】 Each of the in-vehicle devices 10-1 (10-1A, 10-1B, 10-1C, 10-1D) can also control the alert level according to the type of vehicle V in which the suspicious person SP was detected. For example, each of the in-vehicle devices 10-1 sets more detection settings to turn on than in the case of a different vehicle, if the vehicle V' in which the suspicious person SP was detected is of the same type. Also, each of the in-vehicle devices 10-1 sets a wider alert range by changing the predetermined travel distance to a longer value than in the case of a different vehicle, if the vehicle V' in which the suspicious person SP was detected is of the same type. 【0075】 In other words, each in-vehicle device 10-1 that detects a suspicious person SP can also control the alert level of other in-vehicle devices 10-1' within the alert range by transmitting the vehicle type of the vehicle V as suspicious person information. 【0076】 As described above, the on-board device 10-1 installed in vehicle V enables effective alert level control processing by controlling the alert level of vehicle V within the alert range of suspicious person SP according to the settings of user U. 【0077】 [Processing Flow of Security System 100-1] The processing flow of the security system 100-1 according to Embodiment 1 will be explained using Figure 7. Figure 7 is a flowchart showing an example of the processing flow of the security system 100-1 according to Embodiment 1. Note that the processes in steps S101 to S106 below can be executed in a different order. Also, some of the processes in steps S101 to S106 below may be omitted. 【0078】(1. Suspicious Person Detection Process) Firstly, the in-vehicle device 10-1 performs a suspicious person detection process (step S101). For example, the in-vehicle device 10-1 detects the approach, reconnaissance, intrusion, etc., of a suspicious person SP to the vehicle V. 【0079】 (2. Travel Path Estimation Processing) Secondly, the in-vehicle device 10-1 performs travel path estimation processing (step S102). For example, the in-vehicle device 10-1 identifies the location of other in-vehicle devices 10-1' and estimates the travel path from vehicle V to other vehicle V'. 【0080】 (3. Suspicious Person Information Transmission Process) Thirdly, the in-vehicle device 10-1 performs the suspicious person information transmission process (step S103). For example, the in-vehicle device 10-1 transmits suspicious person information to an in-vehicle device 10-1 installed in another vehicle V located at a predetermined distance or less along the travel route. 【0081】 (4. Processing of receiving information on suspicious persons) Fourth, the other in-vehicle device 10-1' performs processing of receiving information on suspicious persons (step S104). For example, the other in-vehicle device 10-1' receives information on suspicious persons transmitted from the in-vehicle device 10-1. 【0082】 (5. Alert Level Control Processing) Fifth, the other in-vehicle devices 10-1' perform alert level control processing (step S105). For example, the other in-vehicle devices 10-1' change or maintain the detection settings and the predetermined travel distance which is the alert range as the set alert level. At this time, if the sharing of suspicious person information among all in-vehicle devices 10-1 is completed (step S106: Yes), the in-vehicle device 10-1 terminates processing. On the other hand, if the sharing of suspicious person information among all in-vehicle devices 10-1 is not completed (step S106: No), the in-vehicle device 10-1 returns to processing in step S102. 【0083】 [Effects of Embodiment 1] The effects of Embodiment 1 will be described below. Effects 1 to 14 corresponding to each process in Embodiment 1 will be described below. 【0084】(1. Effect 1) Firstly, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 is mounted on the vehicle V, detects suspicious persons SP against the vehicle V, and when it detects a suspicious person SP, transmits suspicious person information about the suspicious person SP to another in-vehicle device 10-1' located within a predetermined travel distance from the in-vehicle device 10-1. When it receives the suspicious person information transmitted from the other in-vehicle device 10-1', it controls the alert level set in the in-vehicle device 10-1 based on the suspicious person information. Therefore, since geographical factors can be taken into consideration in this process, it is possible to prevent the damage caused by suspicious persons SP against the vehicle V from escalating. 【0085】 (2. Effect 2) Secondly, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 raises the alert level set in the in-vehicle device 10-1 to a higher level when the user U of the vehicle V permits a change in the alert level. Therefore, in this process, the alert level can be raised in accordance with the user U's wishes while taking geographical factors into consideration, thereby preventing the escalation of damage to the vehicle V by suspicious persons SP. 【0086】 (3. Effect 3) Thirdly, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 maintains the alert level set in the in-vehicle device 10-1 when the user U of the vehicle V has not authorized a change in the alert level. Therefore, in this process, the alert level can be maintained in accordance with the user U's wishes while taking geographical factors into consideration, thereby preventing the escalation of damage to the vehicle V by suspicious persons SP. 【0087】 (4. Effect 4) Fourth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 estimates the travel route from the vehicle V on which the in-vehicle device 10-1 is installed to the vehicle V' on which another in-vehicle device 10-1' is installed, and transmits information about the suspicious person to the other in-vehicle device 10-1' whose travel distance when traveling along the estimated travel route is less than or equal to a predetermined value. Therefore, in this process, the alert level of the in-vehicle device 10-1 can be controlled while taking geographical factors into consideration, so that the damage caused by the suspicious person SP to vehicle V can be prevented from spreading. 【0088】(5. Effect 5) Fifth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 transmits information about the suspicious person to other in-vehicle devices 10-1' whose travel distance when traveling along the shortest travel path among the estimated multiple travel paths is less than or equal to a predetermined value. Therefore, in this process, the alert level of the in-vehicle devices 10-1 within the shortest distance range can be controlled while taking geographical factors into consideration, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0089】 (6. Effect 6) Sixth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 transmits information about the suspicious person to other in-vehicle devices 10-1' whose average travel distance when traveling along a plurality of estimated travel routes is less than or equal to a predetermined value. Therefore, in this process, the alert level of the in-vehicle devices 10-1 within the average distance range can be controlled while taking geographical factors into consideration, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0090】 (7. Effect 7) Seventh, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 selects a travel route using the received weather information. Therefore, in this process, the alert level of the in-vehicle device 10-1 can be controlled by considering weather conditions in addition to geographical factors, thereby preventing the damage to the vehicle V from being exacerbated by suspicious persons (SP). 【0091】 (8. Effect 8) Eighth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 selects a travel route using the received traffic information. Therefore, in this process, the alert level of the in-vehicle device 10-1 can be controlled by further considering the traffic situation in addition to geographical factors, thereby preventing the damage to the vehicle V from being exacerbated by suspicious persons SP. 【0092】(9. Effect 9) Ninthly, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 estimates the attributes of the detected suspicious person SP using the image data of the suspicious person SP, and controls a predetermined travel distance set in the in-vehicle device 10-1 as an alert level according to the estimated attributes. Therefore, in this process, the alert level of the in-vehicle device 10-1 is controlled by further considering the gender and age of the suspicious person SP in addition to geographical factors, and the suspicious person information can be shared at the controlled alert level, so that the damage to the vehicle V caused by the suspicious person SP can be prevented from spreading. 【0093】 (10. Effect 10) Tenth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 controls the detection settings for detecting suspicious persons SP for the vehicle V on which the in-vehicle device 10-1 is installed, as an alert level, and detects suspicious persons SP using the controlled detection settings. Therefore, in this process, the detection settings of the in-vehicle device 10-1 can be controlled while taking geographical factors into consideration, so that the damage caused by suspicious persons SP to the vehicle V can be prevented from spreading. 【0094】 (11. Effect 11) Eleventhly, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 controls the detection settings for detecting the approach, reconnaissance, and intrusion of suspicious persons SP to the vehicle V on which the in-vehicle device 10-1 is installed, as a warning level. Therefore, in this process, the approach detection setting, reconnaissance detection setting, and intrusion detection setting of the in-vehicle device 10-1 can be controlled while taking geographical factors into consideration, so that the damage caused by suspicious persons SP to the vehicle V can be prevented from escalating. 【0095】 (12. Effect 12) Twelfthly, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 controls a predetermined travel distance set in the in-vehicle device 10-1 as an alert level, and when the in-vehicle device 10-1 detects a suspicious person SP, it transmits information about the suspicious person to another in-vehicle device 10-1' located within the controlled predetermined travel distance. Therefore, in this process, the alert level of the in-vehicle device 10-1 is controlled while taking geographical factors into consideration, and a suspicious person SP can be detected at the controlled alert level, thus preventing the damage to the vehicle V from spreading due to the suspicious person SP. 【0096】 (13. Effect 13) Thirteenth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 controls the alert level in accordance with the actions of the suspicious person SP indicated by the suspicious person information. Therefore, in this process, the alert level of the in-vehicle device 10-1 can be controlled by further considering the severity of the suspicious actions of the suspicious person SP in addition to geographical factors, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0097】 (14. Effect 14) Fourteenth, in the process according to Embodiment 1 described above, the in-vehicle device 10-1 controls the alert level according to the type of vehicle V in which the suspicious person SP indicated by the suspicious person information was detected. Therefore, in this process, the alert level of the in-vehicle device 10-1 can be controlled by taking into account geographical factors and further considering the specific vehicle type targeted by the suspicious person SP, thereby preventing the damage to vehicle V from being escalated by the suspicious person SP. 【0098】 [Embodiment 2] The configuration and processing of the security system 100-2 according to Embodiment 2, the configuration and processing of each device in the security system 100-2, the processing flow of the security system 100-2, and the effects of Embodiment 2 will be described below. Configurations and processing common to Embodiment 1 will not be described. 【0099】 [Configuration and Processing of Security System 100-2] The configuration and processing of security system 100-2 according to Embodiment 2 will be described using Figure 8. Figure 8 is a diagram showing an example of the configuration and processing of security system 100-2 according to Embodiment 2. Below, an example of the overall configuration of security system 100-2, an example of the processing of security system 100-2, and the effects of security system 100-2 will be described. 【0100】 (1. Example of Security System 100-2 Configuration) The security system 100-2 shown in Figure 8 has on-board devices 10-2 (10-2A, 10-2B, ...) which are each mounted on multiple vehicles V (VA, VB, ...). 【0101】(2. Example of processing by security system 100-2) Firstly, the on-board device 10-2A installed in the vehicle VA detects suspicious persons SP at the parked vehicle VA (step S21). For example, the on-board device 10-2A detects persons who do not possess the electronic key of the parked vehicle VA and who have approached the parked vehicle VA within a predetermined distance, who have peered into the vehicle for a predetermined time or longer, who have entered the vehicle, etc. 【0102】 Secondly, the on-board device 10-2A mounted on the vehicle VA estimates the means of transportation of the detected suspicious person SP (step S22). For example, based on the image data and duration of stay of the suspicious person SP, the on-board device 10-2A estimates the means of transportation of the suspicious person SP as walking, cycling, motorcycle, automobile, or other vehicle VA. ＳＰ It is estimated that this is the case. At this time, the in-vehicle device 10-2A identifies the distance traveled when moving at the average speed of the estimated means of transport as the alert range for the suspicious person SP. 【0103】 Thirdly, the on-board device 10-2A mounted on vehicle VA transmits information about the suspicious person to the on-board device 10-2B mounted on vehicle VB located within the identified security range (step S23). For example, if the on-board device 10-2A estimates that the means of transportation for the suspicious person SP is a car and identifies the travel distance within the security range as 10 km, it estimates multiple travel routes that can be taken by car from the location of the on-board device 10-2A, and transmits information about the suspicious person to the on-board device 10-2B mounted on vehicle VB located within 10 km (e.g., shortest distance, average distance) when traveling along the estimated multiple travel routes. 【0104】Fourth, the on-board device 10-2B mounted on the vehicle VB controls the alert level set in the on-board device 10-2B (step S24). Here, the alert level refers to the detection settings related to the detection of suspicious persons SP in the vehicle V (e.g., approach detection setting, reconnaissance detection setting, intrusion detection setting). For example, when the on-board device 10-2B receives information about a suspicious person from the on-board device 10-2A, it performs control to raise the set alert level. At this time, the on-board device 10-2B can also perform control that does not change the alert level, prioritizing the setting by the user U. 【0105】 (3. Effects of Security System 100-2) As described above, the security system 100-2 performs the following processes. First, the on-board device 10-2A mounted on vehicle VA detects a suspicious person SP in relation to the parked vehicle VA. Second, the on-board device 10-2A mounted on vehicle VA estimates the means of movement of the detected suspicious person SP and determines the movement distance which is the warning range for the suspicious person SP. Third, the on-board device 10-2A mounted on vehicle VA transmits the suspicious person information to the on-board device 10-2B mounted on vehicle VB located within the warning range. Fourth, the on-board device 10-2B mounted on vehicle VB controls the warning level set in the on-board device 10-2B. 【0106】 Therefore, the security system 100-2 has the following effects. Firstly, the security system 100-2 can share information about suspicious persons SP among vehicles V located within a surveillance range that takes into account topographical factors and the means of movement of suspicious persons SP. Secondly, the security system 100-2 can expand the surveillance range for suspicious persons SP in an amoeba-like manner each time a suspicious person SP is detected in a vehicle V. In other words, the security system 100-2 can prevent the damage caused by suspicious persons SP to moving objects such as vehicles V from spreading. 【0107】[Configuration and Processing of Each Device in Security System 100-2] The configuration and processing of the in-vehicle device 10-2 of the security system 100-2 according to Embodiment 2 will be described using Figures 9 and 10. Below, an example of the configuration and processing of the in-vehicle device 10-2 according to Embodiment 2 will be described. Note that the overall configuration example of the security system 100-2 according to Embodiment 2 is the same as that of Embodiment 1, so the explanation will be omitted. 【0108】 (1. Configuration and Processing Examples of On-board Device 10-2) Configuration and processing examples of the on-board device 10-2 will be explained using Figure 9. Figure 9 is a block diagram showing a configuration example of the on-board device 10-2 of the security system 100-2 according to Embodiment 2. The on-board device 10-2 is a terminal mounted on a mobile vehicle. For example, the on-board device 10-2 may be an on-board device 10-2A mounted on vehicle VA, an on-board device 10-2B mounted on vehicle VB, an on-board device 10-2C mounted on vehicle VC, etc. 【0109】 As shown in Figure 9, the in-vehicle device 10-2 includes a communication unit 11, a storage unit 12-2, and an overall control unit 13. The in-vehicle device 10-2 may also include an input unit (e.g., a touch panel) for receiving various operations from the owner of the in-vehicle device 10-2, and a display unit (e.g., a liquid crystal display) for displaying various information. 【0110】 The in-vehicle device 10-2 is, for example, a dedicated terminal mounted on a vehicle V, and consists of a navigation device and a recording device (drive recorder). As one example, the in-vehicle device 10-2 may be a composite device in which an independent navigation device and a recording device are connected in a communicative manner. As another example, the in-vehicle device 10-2 may be a single device having navigation and recording functions. Furthermore, the in-vehicle device 10-2 may be a device that can be carried by the user U. 【0111】 Furthermore, the in-vehicle device 10-2 may be equipped with various sensors. For example, the in-vehicle device 10-2 may have various sensors such as a camera, motion sensor, acceleration sensor, gyro sensor, GPS sensor, and barometric pressure sensor. 【0112】 (1-1. Communication Unit 11) The communication unit 11 is implemented by, for example, a NIC. The communication unit 11 is connected to a predetermined communication network by wire or wireless and transmits and receives information with various devices. 【0113】 (1-2. Storage Unit 12-2) The storage unit 12-2 is implemented by, for example, a semiconductor memory element such as RAM or flash memory, or a storage device such as a hard disk or optical disc. The storage unit 12-2 according to Embodiment 2 has, as shown in Figure 9, a user information storage unit 12a, a suspicious person information storage unit 12b, an alert level storage unit 12c, and a means of transport storage unit 12d. The storage unit 12-2 stores various information that the overall control unit 13 refers to when it operates, and various information acquired when the overall control unit 13 operates. The configuration examples and processing examples of the user information storage unit 12a, the suspicious person information storage unit 12b, and the alert level storage unit 12c are the same as in Embodiment 1, so their explanation is omitted. 【0114】 (1-2-1. Mobility Storage Unit 12d) The mobility storage unit 12d stores the mobility estimated by the estimation unit 13b, which will be described later. Here, an example of the information stored by the mobility storage unit 12d will be explained using Figure 10. Figure 10 is a diagram showing an example of the mobility storage unit 12d of the in-vehicle device 10-2 according to Embodiment 2. In the example of Figure 10, the mobility storage unit 12d has items such as "User ID", "Detection Date and Time", and "Mobility". 【0115】 "User ID" indicates identification information used to identify user U. "Detection Date and Time" indicates the date and time when the suspicious person SP was detected. "Means of Transportation" indicates the type of means of transportation used by the suspicious person SP, such as walking, vehicle (e.g., bicycle, motorcycle, car), etc. 【0116】Figure 10 shows an example in which the means of transportation of a suspicious person SP is stored in the means of transportation storage unit 12d for the vehicle V of user U, identified by user ID "UID#1", with the following conditions: {Detection date and time: "Detection date and time #1-1", means of transportation: "Means of transportation #1-1"}, {Detection date and time: "Detection date and time #1-2", means of transportation: "Means of transportation #1-2"}, {Detection date and time: "Detection date and time #1-3", means of transportation: "Means of transportation #1-3"}, ... 【0117】 (1-3. Overall Control Unit 13) The overall control unit 13 is implemented by, for example, a CPU or MPU executing various programs (corresponding to an example of an information processing program) stored in the memory device inside the in-vehicle device 10-2 using RAM as the working area. Alternatively, the overall control unit 13 may be implemented by an integrated circuit such as an ASIC or FPGA. 【0118】 As shown in Figure 9, the overall control unit 13 includes a detection unit 13a, an estimation unit 13b, a specific unit 13c, a transmission unit 13d, a reception unit 13e, and a control unit 13f, and realizes or executes the information processing functions and operations described below. Note that the internal configuration of the overall control unit 13 is not limited to the configuration shown in Figure 9, and other configurations are also acceptable as long as they perform the information processing described later. 【0119】 (1-3-1. Detection Unit 13a) The detection unit 13a detects various types of information. The detection unit 13a stores the detected information in the storage unit 12-2. 【0120】The detection unit 13a detects suspicious persons SPs (security personnel) in relation to a moving vehicle V. For example, the detection unit 13a detects the approach of a suspicious person SP to a vehicle V equipped with an in-vehicle device 10-2, which is a terminal. The detection unit 13a also detects reconnaissance by a suspicious person SP towards a vehicle V equipped with an in-vehicle device 10-2. The detection unit 13a also detects the intrusion of a suspicious person SP into a vehicle V equipped with an in-vehicle device 10-2. Furthermore, the detection unit 13a detects suspicious persons SPs using detection settings controlled by the control unit 13f. The detection unit 13a can also detect the type of suspicious activity, such as approach, reconnaissance, or intrusion, the location information of the vehicle V, the type of vehicle V, and image data of the suspicious person SPs captured by the in-vehicle device 10-2. The detection unit 13a stores the suspicious person information related to the detected suspicious person SPs in the suspicious person information storage unit 12b. 【0121】 (1-3-2. Estimation Unit 13b) The estimation unit 13b estimates various types of information. The estimation unit 13b stores the estimated information in the storage unit 12-2. The estimation unit 13b also refers to the information stored in the storage unit 12-2. 【0122】 The estimation unit 13b estimates the means of transportation of the detected suspicious person SP. For example, the estimation unit 13b estimates the means of transportation of the detected suspicious person SP using the image data of the detected suspicious person SP. The estimation unit 13b also estimates the means of transportation of the detected suspicious person SP using the time spent by the suspicious person SP. In this case, the estimation unit 13b estimates the means of transportation of the suspicious person SP to be walking. The estimation unit 13b also estimates the means of transportation of the suspicious person SP to be a vehicle V ＳＰ It is estimated that the vehicle V ＳＰ The type of vehicle is estimated to be either a bicycle, a motorcycle, or an automobile. 【0123】Furthermore, the estimation unit 13b estimates the travel route from the vehicle V equipped with the in-vehicle device 10-2 to the vehicle V equipped with the other in-vehicle device 10-2'. The estimation unit 13b also selects a travel route using the received weather information and corrects the travel speed. The estimation unit 13b also selects a travel route using the received traffic information and corrects the travel speed. Furthermore, the estimation unit 13b estimates the attributes of the detected suspicious person SP (e.g., gender, age) using the image data of the suspicious person SP and corrects the travel speed. 【0124】 (1-3-3. Identification Unit 13c) The identification unit 13c identifies various types of information. The identification unit 13c stores the identified information in the storage unit 12-2. The identification unit 13c also refers to the information stored in the storage unit 12-2. 【0125】 The identification unit 13c identifies the surveillance area of ​​the suspected suspicious person SP based on the means of transportation of the suspected suspicious person SP. For example, the identification unit 13c identifies the distance traveled in a predetermined time when traveling along a travel route that can be traveled on foot at a walking speed as the surveillance area. In addition, the identification unit 13c identifies the vehicle V as the surveillance area. ＳＰ At the speed of movement, vehicle V ＳＰ The system determines the distance traveled in a predetermined time when moving along a movable path. The identification unit 13c also determines the warning range based on the estimated vehicle type and its speed, and the vehicle V ＳＰ The system determines the distance traveled in a given time when traveling along a route that is accessible by a specific type of vehicle (e.g., bicycle, motorcycle, automobile). 【0126】 The identification unit 13c identifies the location of other in-vehicle devices 10-2'. For example, the identification unit 13c receives location information transmitted from other in-vehicle devices 10-2' and identifies the location of the other in-vehicle devices 10-2' on a map. At this time, the identification unit 13c can also receive location information transmitted from a server device that manages the location information of the in-vehicle devices 10-2' and identify the location of the other in-vehicle devices 10-2' on a map. 【0127】(1-3-4. Transmitting Unit 13d) The transmitting unit 13d transmits various types of information. The transmitting unit 13d also refers to the various types of information stored in the storage unit 12-2. 【0128】 The transmitting unit 13d transmits suspicious person information regarding the suspicious person SP detected by the detection unit 13a from the in-vehicle device 10-2 to other in-vehicle devices 10-2' located within the warning range. For example, the transmitting unit 13d transmits suspicious person information to other in-vehicle devices 10-2' whose travel distance when moving along the estimated travel path is less than or equal to a predetermined value, as part of the warning range. The transmitting unit 13d also transmits suspicious person information to other in-vehicle devices 10-2' whose travel distance when moving along the shortest of multiple estimated travel paths is less than or equal to a predetermined value, as part of the warning range. Furthermore, the transmitting unit 13d transmits suspicious person information to other in-vehicle devices 10-2' whose average travel distance when moving along multiple estimated travel paths is less than or equal to a predetermined value, as part of the warning range. In addition, if the in-vehicle device 10-2 detects a suspicious person SP, the transmitting unit 13d transmits suspicious person information to other in-vehicle devices 10-2' located within a predetermined travel distance, as part of the controlled warning range. Furthermore, the transmitting unit 13d transmits information about suspicious persons, including the type of suspicious activity by the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP taken by the in-vehicle device 10-2. At this time, the transmitting unit 13d refers to the information about suspicious persons stored in the suspicious person information storage unit 12b. The transmitting unit 13d can also refer to the user information stored in the user information storage unit 12a. 【0129】 (1-3-5. Receiving Unit 13e) The receiving unit 13e receives various types of information. The receiving unit 13e stores the received information in the storage unit 12-2. 【0130】 The receiving unit 13e receives suspicious person information transmitted from other in-vehicle devices 10-2'. The receiving unit 13e also receives location information transmitted from other in-vehicle devices 10-2'. Furthermore, the receiving unit 13e can also store suspicious person information transmitted from other in-vehicle devices 10-2' in the suspicious person information storage unit 12b. 【0131】(1-3-6. Control Unit 13f) The control unit 13f performs various controls. The control unit 13f also refers to various information stored in the storage unit 12-2. 【0132】 When the control unit 13f receives suspicious person information transmitted from another in-vehicle device 10-2', it controls the alert level set on the in-vehicle device 10-2 based on the suspicious person information. For example, if the user U of vehicle V has permitted a change in the alert level, the control unit 13f raises the alert level set on the in-vehicle device 10-2 to a higher level. Also, if the user U of vehicle V has not permitted a change in the alert level, the control unit 13f maintains the alert level set on the in-vehicle device 10-2. Furthermore, the control unit 13f controls the detection settings related to the detection of suspicious person SPs for vehicle V equipped with the in-vehicle device 10-2 as an alert level. Also, the control unit 13f controls the detection settings related to the detection of approach, reconnaissance, and intrusion of suspicious person SPs for vehicle V equipped with the in-vehicle device 10-2 as an alert level. Furthermore, the control unit 13f controls a predetermined travel distance set on the in-vehicle device 10-2 as an alert level. Furthermore, the control unit 13f controls a predetermined travel distance set in the in-vehicle device 10-2 as an alert level, according to the attributes of the estimated suspicious person SP. The control unit 13f also controls the alert level according to the actions of the suspicious person SP indicated by the suspicious person information (e.g., approach, reconnaissance, intrusion). Furthermore, the control unit 13f controls the alert level according to the type of vehicle V that detected the suspicious person SP indicated by the suspicious person information (e.g., specific vehicle type). 【0133】 (2. Specific Examples of Each Process of Security System 100-2) Specific examples of each process of security system 100-2 according to Embodiment 2 will be described below. Specific examples of the means of movement estimation process and the suspicious person information transmission process of security system 100-2 according to Embodiment 2 will be described below. Note that specific examples of the suspicious person detection process and the alert level control process are the same as in Embodiment 1, so their explanation will be omitted. 【0134】(2-1. Specific Examples of Means of Transportation Estimation Processing) The means of transportation estimation processing of the security system 100-2 according to Embodiment 2 will be described below. The following description will focus on the case where an on-board device 10-2A is mounted on a vehicle VA. 【0135】 Firstly, if a person peers into the interior of the vehicle VA, the in-vehicle device 10-2A detects the "reconnaissance" by a suspicious person SP and emits a warning sound or starts taking pictures with its camera. 【0136】 Secondly, the in-vehicle device 10-2A analyzes the image data of the suspicious person SP captured by the camera and estimates the means of transportation of the suspicious person SP, such as walking, cycling, motorcycling, or driving a car. In this case, if the time the suspicious person SP stays is shorter than a predetermined value, the in-vehicle device 10-2A may estimate the means of transportation of the suspicious person SP to be walking, or if the time the suspicious person SP stays is longer than a predetermined value, it may estimate the means of transportation of the suspicious person SP to be a bicycle, motorcycling, or driving a car. 【0137】 Thirdly, the in-vehicle device 10-2A identifies a surveillance range corresponding to the suspicious person SP's mode of transportation. In this case, the in-vehicle device 10-2A identifies the distance traveled if the suspicious person SP were to travel for a certain period of time at the average speed of the estimated mode of transportation as the surveillance range for the suspicious person SP. That is, the in-vehicle device 10-2A identifies wider surveillance ranges in the order of walking, cycling, motorcycle, and automobile. The in-vehicle device 10-2A may also estimate the attributes of the suspicious person SP, such as gender and age, based on the image data of the suspicious person SP, and if the estimated mode of transportation is walking or cycling, it may adjust the speed of travel and the distance of travel, which is the surveillance range. The in-vehicle device 10-2A may also receive weather information and select a travel route that considers detours based on information such as road closures due to bad weather. The in-vehicle device 10-2A may also receive traffic information and select a travel route that considers detours based on information such as road closures due to construction and congestion. 【0138】 As described above, the on-board device 10-2 installed in vehicle V enables highly accurate estimation of the means of transportation based on the image data and duration of stay of the suspicious person SP. 【0139】(2-2. Specific Examples of Suspicious Person Information Transmission Processing) The suspicious person information transmission processing of the security system 100-2 according to Embodiment 2 will be described below. The following describes the case in which the in-vehicle device 10-2A is mounted on vehicle VA, the in-vehicle device 10-2B is mounted on vehicle VB, the in-vehicle device 10-2C is mounted on vehicle VC, and the in-vehicle device 10-2D is mounted on vehicle VD. 【0140】 Firstly, the in-vehicle device 10-2A identifies the locations of in-vehicle devices 10-2B, 10-2C, and 10-2D, and estimates the travel routes from vehicle VA to vehicle VB, from vehicle VA to vehicle VC, and from vehicle VA to vehicle VD. At this time, the in-vehicle device 10-2A estimates a travel route corresponding to the estimated means of transportation. For example, if the estimated means of transportation is walking, the in-vehicle device 10-2A estimates a travel route such as a sidewalk that can be traveled on foot; if the estimated means of transportation is a bicycle, it estimates a travel route such as a sidewalk or road that can be traveled on by a bicycle; and if the estimated means of transportation is a motorcycle or automobile, it estimates a travel route such as a road that can be traveled on by a motorcycle or automobile. In addition, the in-vehicle device 10-2A may receive weather information and estimate a travel route that takes detours into consideration based on information such as road closures due to bad weather. Furthermore, the in-vehicle device 10-2A may receive traffic information and estimate a travel route that takes detours into consideration based on information such as road closures due to construction and traffic congestion. 【0141】 Secondly, the in-vehicle device 10-2A estimates, for example, that the travel distance from vehicle VA to vehicle VB is 2 km, the travel distance from vehicle VA to vehicle VC is 3 km, and the travel distance from vehicle VA to vehicle VD is 6 km. In this case, if there are multiple travel routes, the in-vehicle device 10-2A estimates the shortest distance among the multiple travel routes or the average distance of the multiple travel routes as the travel distance. 【0142】Thirdly, if the specified surveillance range, which is a travel distance of 10 km, is 10 km, the in-vehicle device 10-2A transmits suspicious person information to in-vehicle devices 10-2B, 10-2C, and 10-2D, which are located along the travel route at a distance of 10 km or less. At this time, the in-vehicle device 10-2A transmits the type of suspicious activity of the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP taken by the in-vehicle device 10-2A. The in-vehicle device 10-2A may also estimate the attributes of the suspicious person SP, such as gender and age, based on the image data of the suspicious person SP and transmit this as suspicious person information. 【0143】 As described above, the on-board device 10-2 mounted on the vehicle V enables the transmission of suspicious person information that takes geographical factors into consideration, according to the means of transportation of the suspicious person SP and the surveillance range corresponding to that means of transportation. 【0144】 [Processing Flow of Security System 100-2] The processing flow of the security system 100-2 according to Embodiment 2 will be explained using Figure 11. Figure 11 is a flowchart showing an example of the processing flow of the security system 100-2 according to Embodiment 2. Note that the processes in steps S201 to S208 below can be executed in a different order. Also, some of the processes in steps S201 to S208 below may be omitted. 【0145】 (1. Suspicious Person Detection Process) Firstly, the in-vehicle device 10-2 performs a suspicious person detection process (step S201). For example, the in-vehicle device 10-2 detects the approach, reconnaissance, intrusion, etc., of a suspicious person SP to the vehicle V. 【0146】 (2. Means of Transportation Estimation Process) Secondly, the in-vehicle device 10-2 performs a means of transportation estimation process (step S202). For example, the in-vehicle device 10-2 estimates the means of transportation of the detected suspicious person SP to be walking, cycling, motorcycle, automobile, etc. 【0147】(3. Security Area Identification Process) Thirdly, the vehicle-mounted device 10-2 performs security area identification processing (step S203). For example, the vehicle-mounted device 10-2 identifies the distance traveled when moving at the average speed of the estimated means of transport as the security area for the suspicious person SP. 【0148】 (4. Movement Path Estimation Processing) Fourth, the on-board device 10-2 performs movement path estimation processing (step S204). For example, the on-board device 10-2 identifies the location of other on-board devices 10-2' and estimates the movement path from vehicle V to other vehicle V' that can be moved by the estimated means of transport. 【0149】 (5. Suspicious Person Information Transmission Process) Fifth, the in-vehicle device 10-2 performs suspicious person information transmission processing (step S205). For example, the in-vehicle device 10-2 transmits suspicious person information to an in-vehicle device 10-2' installed in another vehicle V' located at a predetermined distance or less along the travel route. 【0150】 (6. Processing of receiving information on suspicious persons) Sixth, the other in-vehicle device 10-2' performs processing of receiving information on suspicious persons (step S206). For example, the in-vehicle device 10-2' receives information on suspicious persons transmitted from the in-vehicle device 10-2. 【0151】 (7. Alert Level Control Processing) Seventh, the other in-vehicle devices 10-2' perform alert level control processing (step S207). For example, the other in-vehicle devices 10-2' change or maintain the detection settings and the predetermined travel distance which is the alert range as the set alert level. At this time, if the sharing of suspicious person information among all in-vehicle devices 10-2 is completed (step S208: Yes), the in-vehicle device 10-2 terminates the process. On the other hand, if the sharing of suspicious person information among all in-vehicle devices 10-2 is not completed (step S208: No), the in-vehicle device 10-2 returns to the process in step S204. 【0152】 [Effects of Embodiment 2] The effects of Embodiment 2 will now be described. Below, effects 1 to 15 corresponding to each process in Embodiment 2 will be described. 【0153】(1. Effect 1) Firstly, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 is mounted on the vehicle V, detects suspicious persons SP to the vehicle V, estimates the means of transportation of the detected suspicious persons SP, identifies the alert range of the suspicious persons SP based on the estimated means of transportation of the suspicious persons SP, transmits suspicious person information regarding the suspicious persons SP from the in-vehicle device 10-2 to other in-vehicle devices 10-2' located within the alert range, and when it receives suspicious person information transmitted from the other in-vehicle devices 10-2', it controls the alert level set in the in-vehicle device 10-2 based on the suspicious person information. Therefore, in this process, geographical factors and the means of transportation of the suspicious persons SP can be taken into consideration, so it is possible to prevent the damage to the vehicle V from spreading due to suspicious persons SP. 【0154】 (2. Effect 2) Secondly, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 raises the alert level set in the in-vehicle device 10-2 to a higher level when the user U of the vehicle V permits a change in the alert level. Therefore, in this process, the alert level can be raised in accordance with the user U's wishes, taking into account geographical factors and the means of transportation of the suspicious person SP, thereby preventing the damage to the vehicle V from being escalated by the suspicious person SP. 【0155】 (3. Effect 3) Thirdly, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 maintains the alert level set in the in-vehicle device 10-2 when the user U of the vehicle V has not authorized a change in the alert level. Therefore, in this process, the alert level can be maintained in accordance with the user U's wishes, taking into account geographical factors and the means of transportation of the suspicious person SP, thereby preventing the damage to the vehicle V from being escalated by the suspicious person SP. 【0156】 (4. Effect 4) Fourth, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 estimates the means of movement of the detected suspicious person SP using the image data of the suspicious person SP. Therefore, in this process, geographical factors and the means of movement of the suspicious person SP can be taken into consideration by estimating the means of movement of the suspicious person SP based on image analysis, and thus it is possible to prevent the damage to the vehicle V caused by the suspicious person SP from spreading. 【0157】 (5. Effect 5) Fifthly, in the process according to the above-described Embodiment 2, the in-vehicle device 10-2 estimates the means of movement of the suspicious person SP using the detected stay time of the suspicious person SP. Therefore, in this process, by estimating the means of movement of the suspicious person SP based on the stay time, geographical factors and the means of movement of the suspicious person SP can be considered, so that an expansion of damage caused by the suspicious person SP to the vehicle V can be prevented. 【0158】 (6. Effect 6) Sixthly, in the process according to the above-described Embodiment 2, the in-vehicle device 10-2 estimates that the means of movement of the suspicious person SP is on foot, and as a warning range, it specifies the moving distance within a predetermined time when moving along a moving route that can be traveled on foot at the moving speed on foot. Therefore, in this process, by estimating that the means of movement of the suspicious person SP is on foot, geographical factors and the means of movement of the suspicious person SP can be considered, so that an expansion of damage caused by the suspicious person SP to the vehicle V can be prevented. 【0159】 (7. Effect 7) Seventhly, in the process according to the above-described Embodiment 2, the in-vehicle device 10-2 estimates that the means of movement of the suspicious person SP is the vehicle V ＳＰ and as a warning range, at the moving speed by the vehicle V ＳＰ it specifies the moving distance within a predetermined time when moving along a moving route that can be traveled by the vehicle V ＳＰ Therefore, in this process, by estimating that the means of movement of the suspicious person SP is the vehicle V ＳＰ geographical factors and the means of movement of the suspicious person SP can be considered, so that an expansion of damage caused by the suspicious person SP to the vehicle V can be prevented. 【0160】 (8. Effect 8) Eighthly, in the process according to the above-described Embodiment 2, the in-vehicle device 10-2 estimates that the type of the vehicle V ＳＰ is a bicycle, a motorcycle, or an automobile, and as a warning range, at the moving speed according to the estimated type of the vehicle V ＳＰ it is the vehicle V ＳＰThe distance traveled in a given time when moving along a possible route is determined by the type of vehicle. Therefore, in this process, geographical factors and the means of transportation of the suspicious person SP can be taken into consideration by estimating that the suspicious person SP is traveling by bicycle, motorcycle, or automobile, thereby preventing the damage to vehicle V from being exacerbated by the suspicious person SP. 【0161】 (9. Effect 9) Ninthly, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 selects a travel route using the received weather information and corrects the travel speed. Therefore, in this process, the alert level of the in-vehicle device 10-2 can be controlled by considering geographical factors and the means of transportation of the suspicious person SP, and further considering the weather conditions, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0162】 (10. Effect 10) Tenth, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 selects a travel route using the received traffic information and corrects the travel speed. Therefore, in this process, the alert level of the in-vehicle device 10-2 can be controlled by further considering the traffic situation in addition to geographical factors and the means of transportation of the suspicious person SP, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0163】 (11. Effect 11) Eleventhly, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 uses the image data of the detected suspicious person SP to estimate the attributes of the suspicious person SP and correct the speed of movement. Therefore, in this process, the alert level of the in-vehicle device 10-2 can be controlled by considering geographical factors and the means of movement of the suspicious person SP, as well as further considering the gender and age of the suspicious person SP, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0164】(12. Effect 12) Twelfthly, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 controls the detection settings for detecting suspicious persons SP on the vehicle V on which the in-vehicle device 10-2 is installed, as an alert level, and detects suspicious persons SP using the controlled detection settings. Therefore, in this process, the detection settings of the in-vehicle device 10-2 can be controlled while taking into account geographical factors and the means of transportation of the suspicious persons SP, so that the damage caused by suspicious persons SP to the vehicle V can be prevented. 【0165】 (13. Effect 13) Thirteenth, in the process according to Embodiment 2 described above, the on-board device 10-2 controls the detection settings for detecting the approach, reconnaissance, and intrusion of a suspicious person SP to the vehicle V on which the on-board device 10-2 is installed, as a warning level. Therefore, in this process, the approach detection setting, reconnaissance detection setting, and intrusion detection setting of the on-board device 10-2 can be controlled while taking into account geographical factors and the means of transportation of the suspicious person SP, so that the damage caused by the suspicious person SP to the vehicle V can be prevented. 【0166】 (14. Effect 14) Fourteenth, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 controls the alert level in accordance with the actions of the suspicious person SP indicated by the suspicious person information. Therefore, in this process, the alert level of the in-vehicle device 10-2 can be controlled by further considering the severity of the suspicious actions of the suspicious person SP, in addition to geographical factors and the means of transportation of the suspicious person SP, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0167】 (15. Effect 15) Fifteenth, in the process according to Embodiment 2 described above, the in-vehicle device 10-2 controls the alert level according to the type of vehicle V in which the suspicious person SP indicated by the suspicious person information was detected. Therefore, in this process, the alert level of the in-vehicle device 10-2 can be controlled by taking into account geographical factors and the means of transportation of the suspicious person SP, and further considering the specific vehicle type targeted by the suspicious person SP, thereby preventing the damage to vehicle V from being exacerbated by the suspicious person SP. 【0168】[Embodiment 3] The configuration and processing of the security system 100-3 according to Embodiment 3, the configuration and processing of each device in the security system 100-3, the processing flow of the security system 100-3, and the effects of Embodiment 3 will be described below. Note that configurations and processing common to Embodiment 1 or Embodiment 2 will not be described. 【0169】 [Configuration and Processing of Security System 100-3] The configuration and processing of security system 100-3 according to Embodiment 3 will be described using Figure 12. Figure 12 is a diagram showing an example of the configuration and processing of security system 100-3 according to Embodiment 3. Below, an example of the overall configuration of security system 100-3, an example of the processing of security system 100-3, and the effects of security system 100-3 will be described. 【0170】 (1. Example of Security System 100-3 Configuration) The security system 100-3 shown in Figure 12 has on-board devices 10-3 (10-3A, 10-3B, ...) that are mounted on multiple vehicles V (VA, VB, ...). 【0171】 (2. Example of processing by security system 100-3) Firstly, the on-board device 10-3A installed in the vehicle VA detects a suspicious person SP targeting the parked vehicle VA (step S31). For example, the on-board device 10-3A detects a person who does not possess the electronic key of the parked vehicle VA and who has approached the parked vehicle VA within a predetermined distance, peered into the vehicle for a predetermined time or longer, or entered the vehicle. 【0172】 Secondly, the on-board device 10-3A installed in the vehicle VA estimates the motive of the detected suspicious person SP (step S32). For example, based on the image data and duration of stay of the suspicious person SP, the on-board device 10-3A estimates the motive of the suspicious person SP to be a prankster, a car thief, or reconnaissance for a car thief. At this time, the on-board device 10-3A identifies the distance traveled by the suspicious person SP if they travel by means of transportation corresponding to the estimated motive (e.g., a prankster travels on foot, a car thief travels by car) as the area of ​​vigilance for the suspicious person SP. 【0173】 Thirdly, the on-board device 10-3A installed in vehicle VA transmits information about the suspicious person to the on-board device 10-3B installed in vehicle VB located within the identified security range (step S33). For example, if the on-board device 10-3A estimates that the suspicious person SP's motive is car theft, estimates that the suspicious person SP's means of transportation is a car, and identifies the travel distance within the security range as 10 km, it estimates multiple travel routes that can be taken by car from the location of the on-board device 10-3A, and transmits information about the suspicious person to the on-board device 10-3B installed in vehicle VB located within 10 km (e.g., shortest distance, average distance) when traveling along the estimated multiple travel routes. 【0174】 In this case, the in-vehicle device 10-3A may, for example, estimate that the suspicious person SP's motive is reconnaissance for car theft, specify a surveillance area according to the estimated motive, and transmit information about the suspicious person. If the same person as the suspicious person SP is detected again, the device will newly estimate that the motive for the current crime is car theft, specify a new surveillance area according to the newly estimated motive, and transmit new information about the suspicious person. The in-vehicle device 10-3A may also transmit the newly estimated means of transportation of the suspicious person SP along with the information about the suspicious person. 【0175】 Fourth, the on-board device 10-3B mounted on the vehicle VB controls the alert level set in the on-board device 10-3B (step S34). Here, the alert level refers to the detection settings related to the detection of suspicious persons SP in the vehicle V (e.g., proximity detection setting, reconnaissance detection setting, intrusion detection setting). For example, when the on-board device 10-3B receives information about a suspicious person from the on-board device 10-3A, it performs control to raise the set alert level. At this time, the on-board device 10-3B can also perform control that does not change the alert level, prioritizing the setting by the user U. 【0176】(3. Effects of Security System 100-3) As described above, the security system 100-3 performs the following processes. First, the on-board device 10-3A installed in vehicle VA detects a suspicious person SP targeting the parked vehicle VA. Second, the on-board device 10-3A installed in vehicle VA estimates the motive of the detected suspicious person SP and identifies the travel distance which is the alert range for the suspicious person SP. Third, the on-board device 10-3A installed in vehicle VA transmits the suspicious person information to the on-board device 10-3B installed in vehicle VB located within the alert range. Fourth, the on-board device 10-3B installed in vehicle VB controls the alert level set in the on-board device 10-3B. 【0177】 Therefore, the security system 100-3 has the following effects. Firstly, the security system 100-3 can share information about suspicious persons SP among vehicles V located within a surveillance range that takes into account topographical factors and the suspicious persons SP's motives for committing crimes. Secondly, the security system 100-3 can expand the surveillance range for suspicious persons SP in an amoeba-like manner each time a suspicious person SP is detected in a vehicle V. In other words, the security system 100-3 can prevent the damage caused by suspicious persons SP to moving objects such as vehicles V from spreading. 【0178】 [Configuration and Processing of Each Device in Security System 100-3] The configuration and processing of the in-vehicle device 10-3 of the security system 100-3 according to Embodiment 3 will be described using Figures 13 and 14. Below, an example of the configuration and processing of the in-vehicle device 10-3 according to Embodiment 3 will be described. Note that the overall configuration example of the security system 100-3 according to Embodiment 3 is the same as that of Embodiment 1, so the explanation will be omitted. 【0179】(1. Configuration and Processing Examples of the In-Vehicle Device 10-3) Configuration and processing examples of the in-vehicle device 10-3 will be explained using Figure 13. Figure 13 is a block diagram showing a configuration example of the in-vehicle device 10-3 of the security system 100-3 according to Embodiment 3. The in-vehicle device 10-3 is a terminal mounted on a mobile vehicle. For example, the in-vehicle device 10-3 may be an in-vehicle device 10-3A mounted on vehicle VA, an in-vehicle device 10-3B mounted on vehicle VB, an in-vehicle device 10-3C mounted on vehicle VC, etc. 【0180】 As shown in Figure 13, the in-vehicle device 10-3 includes a communication unit 11, a storage unit 12-3, and an overall control unit 13. The in-vehicle device 10-3 may also include an input unit (e.g., a touch panel) for receiving various operations from the owner of the in-vehicle device 10-3, and a display unit (e.g., a liquid crystal display) for displaying various information. 【0181】 The in-vehicle device 10-3 is, for example, a dedicated terminal mounted on a vehicle V, and consists of a navigation device and a recording device (drive recorder). As one example, the in-vehicle device 10-3 may be a complex device in which an independent navigation device and a recording device are connected in a communicative manner. As another example, the in-vehicle device 10-3 may be a single device having navigation and recording functions. Furthermore, the in-vehicle device 10-3 may be a device that can be carried by the user U. 【0182】 Furthermore, the in-vehicle device 10-3 may be equipped with various sensors. For example, the in-vehicle device 10-3 may have various sensors such as a camera, motion sensor, acceleration sensor, gyro sensor, GPS sensor, and barometric pressure sensor. 【0183】 (1-1. Communication Unit 11) The communication unit 11 is implemented by, for example, a NIC. The communication unit 11 is connected to a predetermined communication network by wire or wireless and transmits and receives information with various devices. 【0184】(1-2. Memory Unit 12-3) The memory unit 12-3 is implemented by, for example, a semiconductor memory element such as RAM or flash memory, or a storage device such as a hard disk or optical disc. The memory unit 12-3 according to Embodiment 3 has, as shown in Figure 13, a user information storage unit 12a, a suspicious person information storage unit 12b, an alert level storage unit 12c, and a crime purpose storage unit 12e. The memory unit 12-3 stores various information that the overall control unit 13 refers to when it operates, and various information acquired when the overall control unit 13 operates. The configuration examples and processing examples of the user information storage unit 12a, the suspicious person information storage unit 12b, and the alert level storage unit 12c are the same as in Embodiment 1, so their explanation is omitted. 【0185】 (1-2-1. Crime Purpose Storage Unit 12e) The crime purpose storage unit 12e stores the crime purpose estimated by the estimation unit 13b, which will be described later. Here, an example of the information stored by the crime purpose storage unit 12e will be explained using Figure 14. Figure 14 is a diagram showing an example of the crime purpose storage unit 12e of the in-vehicle device 10-3 according to Embodiment 3. In the example in Figure 14, the crime purpose storage unit 12e has items such as "User ID", "Detection Date and Time", and "Criminal Purpose". 【0186】 "User ID" indicates identification information used to identify user U. "Detection Date and Time" indicates the date and time when the suspicious person SP was detected. "Purpose of Crime" indicates the type of purpose of the suspicious person SP's crime, such as a prank, car break-in, or reconnaissance for car break-ins. 【0187】 Figure 10 shows an example in which the crime motives of a suspicious person SP are stored in the crime motive storage unit 12e for vehicle V of user U, identified by user ID "UID#1", with the following conditions: {Detection date and time: "Detection date and time #1-1", Crime motive: "Criminal motive #1-1"}, {Detection date and time: "Detection date and time #1-2", Crime motive: "Criminal motive #1-2"}, {Detection date and time: "Detection date and time #1-3", Crime motive: "Criminal motive #1-3"}, ... 【0188】(1-3. Overall Control Unit 13) The overall control unit 13 is implemented, for example, by a CPU or MPU, which executes various programs (corresponding to an example of an information processing program) stored in the memory device inside the in-vehicle device 10-3 using RAM as the working area. Alternatively, the overall control unit 13 may be implemented by an integrated circuit such as an ASIC or FPGA. 【0189】 As shown in Figure 13, the overall control unit 13 includes a detection unit 13a, an estimation unit 13b, a specific unit 13c, a transmission unit 13d, a reception unit 13e, and a control unit 13f, and realizes or executes the information processing functions and operations described below. Note that the internal configuration of the overall control unit 13 is not limited to the configuration shown in Figure 13, and other configurations are also acceptable as long as they perform the information processing described later. 【0190】 (1-3-1. Detection Unit 13a) The detection unit 13a detects various types of information. The detection unit 13a stores the detected information in the storage unit 12-3. 【0191】 The detection unit 13a detects suspicious persons SPs (security personnel) in relation to a moving vehicle V. For example, the detection unit 13a detects the approach of a suspicious person SP to a vehicle V equipped with an in-vehicle device 10-3, which is a terminal. The detection unit 13a also detects reconnaissance by a suspicious person SP towards a vehicle V equipped with an in-vehicle device 10-3. The detection unit 13a also detects the intrusion of a suspicious person SP into a vehicle V equipped with an in-vehicle device 10-3. Furthermore, the detection unit 13a detects suspicious persons SPs using detection settings controlled by the control unit 13f. The detection unit 13a can also detect the type of suspicious activity, such as approach, reconnaissance, or intrusion, the location information of the vehicle V, the type of vehicle V, and image data of the suspicious person SPs captured by the in-vehicle device 10-3. The detection unit 13a also stores the suspicious person information related to the detected suspicious person SPs in the suspicious person information storage unit 12b. 【0192】 (1-3-2. Estimation Unit 13b) The estimation unit 13b estimates various types of information. The estimation unit 13b stores the estimated information in the storage unit 12-3. The estimation unit 13b also refers to the information stored in the storage unit 12-3. 【0193】The estimation unit 13b estimates the purpose of the crime, which is the objective of the detected suspicious person SP. For example, the estimation unit 13b estimates the purpose of the crime of the detected suspicious person SP using the image data of the detected suspicious person SP. The estimation unit 13b also estimates the purpose of the crime of the detected suspicious person SP using the time spent there. In this case, the estimation unit 13b estimates that the purpose of the crime of the suspicious person SP is a prank. The estimation unit 13b also estimates that the purpose of the crime of the suspicious person SP is a car break-in. The estimation unit 13b also estimates that the purpose of the crime of the suspicious person SP is reconnaissance for a car break-in. 【0194】 Furthermore, the estimation unit 13b estimates the travel route from vehicle V equipped with the in-vehicle device 10-3 to vehicle V' equipped with another in-vehicle device 10-3'. The estimation unit 13b also selects a travel route using the received weather information and corrects the travel speed. Furthermore, the estimation unit 13b selects a travel route using the received traffic information and corrects the travel speed. Furthermore, the estimation unit 13b estimates the attributes of the detected suspicious person SP (e.g., gender, age) using the image data of the suspicious person SP and corrects the travel speed. 【0195】 (1-3-3. Identification Unit 13c) The identification unit 13c identifies various types of information. The identification unit 13c stores the identified information in the storage unit 12-3. The identification unit 13c also refers to the information stored in the storage unit 12-3. 【0196】 The identification unit 13c identifies the area of ​​vigilance based on the presumed motive of the suspicious person SP. For example, if the identification unit 13c presumes that the suspicious person SP's motive is a prank, it identifies the distance traveled in a predetermined time when traveling at a walking speed along a route that is traversable on foot as the area of ​​vigilance. Also, if the identification unit 13c presumes that the suspicious person SP's motive is a car break-in, it identifies the area of ​​vigilance as the distance traveled when traveling along a route that is traversable on foot. ＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a predetermined time when moving along a movable route. Furthermore, if the identification unit 13c detects the same person as the suspicious person SP whose motive for the crime is presumed to be reconnaissance for car theft, the alert area is set to Vehicle VＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a predetermined time when traveling along a traversable route. 【0197】 The identification unit 13c identifies the location of other in-vehicle devices 10-3'. For example, the identification unit 13c receives location information transmitted from other in-vehicle devices 10-3' and identifies the location of the other in-vehicle devices 10-3' on a map. At this time, the identification unit 13c can also receive location information transmitted from a server device that manages the location information of the in-vehicle devices 10-3' and identify the location of the other in-vehicle devices 10-3' on a map. 【0198】 (1-3-4. Transmitting Unit 13d) The transmitting unit 13d transmits various types of information. The transmitting unit 13d also refers to the various types of information stored in the storage unit 12-3. 【0199】The transmitting unit 13d transmits suspicious person information regarding the suspicious person SP detected by the detection unit 13a from the in-vehicle device 10-3 to other in-vehicle devices 10-3' located within the warning range. For example, the transmitting unit 13d transmits suspicious person information to other in-vehicle devices 10-3' whose travel distance when moving along the estimated travel path is less than or equal to a predetermined value, as part of the warning range. The transmitting unit 13d also transmits suspicious person information to other in-vehicle devices 10-3' whose travel distance when moving along the shortest of multiple estimated travel paths is less than or equal to a predetermined value, as part of the warning range. Furthermore, the transmitting unit 13d transmits suspicious person information to other in-vehicle devices 10-3' whose average travel distance when moving along multiple estimated travel paths is less than or equal to a predetermined value, as part of the warning range. In addition, if the in-vehicle device 10-3 detects a suspicious person SP, the transmitting unit 13d transmits suspicious person information to other in-vehicle devices 10-3' located within a predetermined travel distance, as part of the controlled warning range. Furthermore, the transmitting unit 13d transmits information about suspicious persons, including the type of suspicious activity by the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP taken by the in-vehicle device 10-3. At this time, the transmitting unit 13d refers to the information about suspicious persons stored in the suspicious person information storage unit 12b. The transmitting unit 13d can also refer to the user information stored in the user information storage unit 12a. 【0200】 (1-3-5. Receiving Unit 13e) The receiving unit 13e receives various types of information. The receiving unit 13e stores the received information in the storage unit 12-3. 【0201】 The receiving unit 13e receives suspicious person information transmitted from other in-vehicle devices 10-3'. The receiving unit 13e also receives location information transmitted from other in-vehicle devices 10-3'. Furthermore, the receiving unit 13e can store suspicious person information transmitted from other in-vehicle devices 10-3' in the suspicious person information storage unit 12b. 【0202】 (1-3-6. Control Unit 13f) The control unit 13f performs various controls. The control unit 13f also refers to various information stored in the storage unit 12-3. 【0203】When the control unit 13f receives suspicious person information transmitted from another in-vehicle device 10-3', it controls the alert level set on the in-vehicle device 10-3 based on the suspicious person information. For example, if the user U of vehicle V has permitted a change in the alert level, the control unit 13f raises the alert level set on the in-vehicle device 10-3 to a higher level. Also, if the user U of vehicle V has not permitted a change in the alert level, the control unit 13f maintains the alert level set on the in-vehicle device 10-3. Furthermore, the control unit 13f controls the detection settings related to the detection of suspicious person SPs for vehicle V equipped with the in-vehicle device 10-3 as an alert level. Also, the control unit 13f controls the detection settings related to the detection of approach, reconnaissance, and intrusion of suspicious person SPs for vehicle V equipped with the in-vehicle device 10-3 as an alert level. Furthermore, the control unit 13f controls a predetermined travel distance set on the in-vehicle device 10-3 as an alert level. Furthermore, the control unit 13f controls a predetermined travel distance set in the in-vehicle device 10-3 as an alert level, according to the attributes of the estimated suspicious person SP. The control unit 13f also controls the alert level according to the actions of the suspicious person SP indicated by the suspicious person information (e.g., approach, reconnaissance, intrusion). Furthermore, the control unit 13f controls the alert level according to the type of vehicle V that detected the suspicious person SP indicated by the suspicious person information (e.g., specific vehicle type). 【0204】 (2. Specific Examples of Each Process of Security System 100-3) Specific examples of each process of security system 100-3 according to Embodiment 3 will be described below. Below, a specific example of the crime intent estimation process of security system 100-3 according to Embodiment 3 will be described. Note that specific examples of the suspicious person detection process, suspicious person information transmission process, and alert level control process are the same as in Embodiment 1, so their explanation will be omitted. 【0205】 (2-1. Specific Examples of Criminal Purpose Estimation Processing) The criminal purpose estimation processing of the security system 100-3 according to Embodiment 3 will be described below. The following description will focus on the case where an in-vehicle device 10-3A is installed in a vehicle VA. 【0206】Firstly, if a person approaches the vehicle VA, the in-vehicle device 10-3A detects the "approach" of a suspicious person SP and emits a warning sound or starts recording with its camera. Also, if a person peers into the interior of the vehicle VA, the in-vehicle device 10-3A detects the "reconnaissance" of a suspicious person SP and emits a warning sound or starts recording with its camera. Furthermore, if a person enters the interior of the vehicle VA, the in-vehicle device 10-3A detects the "intrusion" of a suspicious person SP and emits a warning sound or starts recording with its camera. 【0207】 Secondly, the in-vehicle device 10-3A analyzes image data of the suspicious person SP captured by the camera and estimates the suspicious person SP's motive for the crime, such as a prank, car theft, or reconnaissance for car theft. For example, the in-vehicle device 10-3A analyzes the suspicious person SP's facial recognition, door lock unlocking, window damage, etc., to estimate the suspicious person SP's motive for the crime. The in-vehicle device 10-3A also analyzes the duration of the suspicious person SP's stay and estimates the suspicious person SP's motive for the crime, such as a prank, car theft, or reconnaissance for car theft. For example, if the suspicious person SP's stay is between 1 and 5 minutes, the in-vehicle device 10-3A estimates that the suspicious person SP is a "prankster" with the intention of vandalizing the vehicle V by scratching, denting, spraying, etc. Furthermore, if the suspicious person SP stays for 5 minutes or more, the in-vehicle device 10-3A presumes that the theft is of stolen items such as parts of vehicle V or belongings left behind. Also, if the suspicious person SP stays for less than 1 minute, the in-vehicle device 10-3A presumes that the theft is of reconnaissance for the purpose of scouting for a vehicle break-in. 【0208】Thirdly, the in-vehicle device 10-3A identifies a range of vigilance corresponding to the suspicious person's motive for the crime. At this time, the in-vehicle device 10-3A estimates the means of transportation of the suspicious person based on the estimated motive for the crime, and identifies the distance traveled if the suspicious person were to travel for a certain period of time at the average speed of the estimated means of transportation as the range of vigilance for the suspicious person. For example, in the case of a prank, the in-vehicle device 10-3A estimates that the suspicious person's means of transportation is walking, since no special tools are needed. Also, in the case of a car break-in, the in-vehicle device 10-3A estimates that the suspicious person's means of transportation is a vehicle such as a bicycle, motorcycle, or automobile, since special tools are needed and valuables need to be transported. ＳＰ It is presumed that, in other words, the in-vehicle device 10-3A identifies a wider area of ​​vigilance when the suspicious person's motive is a car break-in than when it is a prank. Furthermore, in the case of reconnaissance for car break-ins, the in-vehicle device 10-3A acquires image data of the suspicious person during the reconnaissance, and if the same person is detected again on a later date, it assumes that the motive is a car break-in and identifies the suspicious person's means of transportation as a vehicle such as a bicycle, motorcycle, or automobile. ＳＰ It is presumed that... Furthermore, the in-vehicle device 10-3A may estimate the attributes of the suspicious person SP, such as gender and age, based on the image data of the suspicious person SP, and if the estimated motive for the crime is that of a prankster, it may adjust the walking speed and the distance of movement within the surveillance range. Furthermore, the in-vehicle device 10-3A may receive weather information and select a route that takes detours into consideration based on information such as road closures due to bad weather. Furthermore, the in-vehicle device 10-3A may receive traffic information and select a route that takes detours into consideration based on information such as road closures due to construction and traffic congestion. 【0209】 As described above, the in-vehicle device 10-3 installed in vehicle V enables highly accurate crime motive estimation processing based on the image data and duration of stay of the suspicious person SP. 【0210】[Processing Flow of Security System 100-3] The processing flow of the security system 100-3 according to Embodiment 3 will be explained using Figure 15. Figure 15 is a flowchart showing an example of the processing flow of the security system 100-3 according to Embodiment 3. Note that the processes in steps S301 to S308 below can be executed in a different order. Also, some of the processes in steps S301 to S308 below may be omitted. 【0211】 (1. Suspicious Person Detection Process) Firstly, the in-vehicle device 10-3 performs a suspicious person detection process (step S301). For example, the in-vehicle device 10-3 detects the approach, reconnaissance, intrusion, etc., of a suspicious person SP to the vehicle V. 【0212】 (2. Crime Purpose Estimation Process) Secondly, the in-vehicle device 10-3 performs crime purpose estimation processing (step S302). For example, the in-vehicle device 10-3 estimates the crime purpose of the detected suspicious person SP to be a prankster, a car thief, or reconnaissance for a car thief. 【0213】 (3. Security Area Identification Process) Thirdly, the in-vehicle device 10-3 performs security area identification processing (step S303). For example, the in-vehicle device 10-3 identifies the distance traveled when moving at an average speed using a means of transportation corresponding to the estimated criminal purpose as the security area for the suspicious person SP. 【0214】 (4. Movement Path Estimation Processing) Fourth, the in-vehicle device 10-3 performs movement path estimation processing (step S304). For example, the in-vehicle device 10-3 identifies the location of other in-vehicle devices 10-3' and estimates the movement path from vehicle V to other vehicle V' that can be moved by the estimated means of transport. 【0215】 (5. Suspicious Person Information Transmission Process) Fifth, the in-vehicle device 10-3 performs suspicious person information transmission processing (step S305). For example, the in-vehicle device 10-3 transmits suspicious person information to an in-vehicle device 10-3' installed in another vehicle V' located at a predetermined distance or less along the travel route. 【0216】(6. Processing of receiving information on suspicious persons) Sixth, the other in-vehicle device 10-3' performs processing of receiving information on suspicious persons (step S306). For example, the in-vehicle device 10-3' receives information on suspicious persons transmitted from the in-vehicle device 10-3. 【0217】 (7. Alert Level Control Processing) Seventh, the other in-vehicle devices 10-3' perform alert level control processing (step S307). For example, the other in-vehicle devices 10-3' change or maintain the detection settings and the predetermined travel distance which is the alert range as the set alert level. At this time, if the sharing of suspicious person information among all in-vehicle devices 10-3 is completed (step S308: Yes), the in-vehicle device 10-3 terminates the process. On the other hand, if the sharing of suspicious person information among all in-vehicle devices 10-3 is not completed (step S308: No), the in-vehicle device 10-3 returns to the process in step S304. 【0218】 [Effects of Embodiment 3] The effects of Embodiment 3 will now be described. Below, effects 1 to 15 corresponding to each process in Embodiment 3 will be described. 【0219】 (1. Effect 1) Firstly, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 is mounted on the vehicle V, detects suspicious persons SP against the vehicle V, estimates the motive of the detected suspicious persons SP, identifies the alert range of the suspicious persons SP based on the estimated motive, transmits suspicious person information about the suspicious persons SP from the in-vehicle device 10-3 to other in-vehicle devices 10-3' located within the alert range, and when it receives suspicious person information transmitted from the other in-vehicle devices 10-3', it controls the alert level set in the in-vehicle device 10-3 based on the suspicious person information. Therefore, in this process, geographical factors and the motive of the suspicious persons SP can be taken into consideration, so it is possible to prevent the damage caused by suspicious persons SP against the vehicle V from escalating. 【0220】(2. Effect 2) Secondly, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 raises the alert level set in the in-vehicle device 10-3 to a higher level when the user U of the vehicle V permits a change in the alert level. Therefore, in this process, the alert level can be raised in accordance with the user U's wishes, taking into account geographical factors and the intent of the suspicious person SP, thereby preventing the damage to the vehicle V from being escalated by the suspicious person SP. 【0221】 (3. Effect 3) Thirdly, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 maintains the alert level set in the in-vehicle device 10-3 when the user U of the vehicle V has not authorized a change in the alert level. Therefore, in this process, the alert level can be maintained in accordance with the user U's wishes, taking into account geographical factors and the criminal intent of the suspicious person SP, thereby preventing the damage to the vehicle V from being escalated by the suspicious person SP. 【0222】 (4. Effect 4) Fourth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 uses the image data of the detected suspicious person SP to estimate the suspicious person SP's motive for the crime. Therefore, in this process, geographical factors and the suspicious person SP's motive for the crime can be taken into consideration by estimating the suspicious person SP's motive based on image analysis, thus preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0223】 (5. Effect 5) Fifth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 estimates the motive of the suspicious person SP by using the time the detected suspicious person SP stayed. Therefore, in this process, geographical factors and the motive of the suspicious person SP can be taken into consideration by estimating the motive of the suspicious person SP based on the time the suspicious person SP stayed, and thus it is possible to prevent the damage to the vehicle V from being escalated by the suspicious person SP. 【0224】(6. Effect 6) Sixth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 estimates that the suspicious person SP's motive for the crime is that of a prankster, and identifies the distance traveled in a predetermined time when moving at a walking speed along a route that can be traveled on foot as the area of ​​vigilance. Therefore, in this process, geographical factors and the suspicious person SP's motive for the crime can be taken into consideration by estimating that the suspicious person SP's motive for the crime is that of a prankster, and thus it is possible to prevent the damage to the vehicle V from being escalated by the suspicious person SP. 【0225】 (7. Effect 7) Seventh, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 estimates that the suspicious person SP's motive for the crime is a car break-in, and sets the vehicle V as the area of ​​vigilance. ＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a given time when moving along a possible route. Therefore, in this process, by estimating that the suspicious person SP's motive is car theft, geographical factors and the suspicious person SP's motive can be taken into consideration, thus preventing the damage to vehicle V from being escalated by the suspicious person SP. 【0226】 (8. Effect 8) Eighth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 estimates that the suspicious person SP's motive for the crime is reconnaissance for the purpose of breaking into a vehicle, and when it detects the same person as the suspicious person SP whose motive is estimated to be reconnaissance for the purpose of breaking into a vehicle, the alert range is set to Vehicle V ＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a given time when moving along a possible travel route. Therefore, in this process, by estimating that the suspicious person SP's motive is reconnaissance for car theft, geographical factors and the suspicious person SP's motive can be taken into consideration, thus preventing the damage to vehicle V from being escalated by the suspicious person SP. 【0227】(9. Effect 9) Ninthly, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 selects a travel route using the received weather information and corrects the travel speed. Therefore, in this process, geographical factors and the intent of the suspicious person SP can be taken into consideration by controlling the alert level of the in-vehicle device 10-3 by taking into consideration the weather conditions after considering geographical factors and the intent of the suspicious person SP, thereby preventing the damage to the vehicle V from being escalated by the suspicious person SP. 【0228】 (10. Effect 10) Tenth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 selects a travel route using the received traffic information and corrects the travel speed. Therefore, in this process, the alert level of the in-vehicle device 10-3 can be controlled by further considering the traffic situation in addition to geographical factors and the criminal intent of the suspicious person SP, thereby preventing the damage to the vehicle V from being escalated by the suspicious person SP. 【0229】 (11. Effect 11) Eleventhly, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 estimates the attributes of the detected suspicious person SP using the image data of the suspicious person SP and corrects the movement speed. Therefore, in this process, the alert level of the in-vehicle device 10-3 can be controlled by considering geographical factors and the suspicious person SP's motive for the crime, as well as further considering the gender and age of the suspicious person SP, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0230】 (12. Effect 12) Twelfthly, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 controls the detection settings for detecting suspicious persons SP on the vehicle V on which the in-vehicle device 10-3 is installed, as an alert level, and detects suspicious persons SP using the controlled detection settings. Therefore, in this process, the detection settings of the in-vehicle device 10-3 can be controlled after considering geographical factors and the criminal intent of the suspicious persons SP, so it is possible to prevent the damage caused by suspicious persons SP to the vehicle V from escalating. 【0231】(13. Effect 13) Thirteenth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 controls the detection settings for detecting the approach, reconnaissance, and intrusion of a suspicious person SP to the vehicle V on which the in-vehicle device 10-3 is installed, as a warning level. Therefore, in this process, the approach detection setting, reconnaissance detection setting, and intrusion detection setting of the in-vehicle device 10-3 can be controlled while taking into account geographical factors and the criminal intent of the suspicious person SP, so that the damage caused by the suspicious person SP to the vehicle V can be prevented from escalating. 【0232】 (14. Effect 14) Fourteenth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 controls the alert level in accordance with the actions of the suspicious person SP indicated by the suspicious person information. Therefore, in this process, the alert level of the in-vehicle device 10-3 can be controlled by further utilizing the maliciousness of the suspicious person SP's suspicious actions, taking into account geographical factors and the suspicious person SP's motives for committing the crime, thereby preventing the damage to the vehicle V from being exacerbated by the suspicious person SP. 【0233】 (15. Effect 15) Fifteenth, in the process according to Embodiment 3 described above, the in-vehicle device 10-3 controls the alert level according to the type of vehicle V in which the suspicious person SP, as indicated by the suspicious person information, was detected. Therefore, in this process, the alert level of the in-vehicle device 10-3 can be controlled by further utilizing the specific vehicle type targeted by the suspicious person SP, taking into account geographical factors and the criminal intent of the suspicious person SP, thereby preventing the damage to vehicle V from being escalated by the suspicious person SP. 【0234】 [Embodiment 4] The configuration and processing of the security system 100-4 according to Embodiment 4, the configuration and processing of each device of the security system 100-4, the processing flow of the security system 100-4, and the effects of Embodiment 4 will be described below. Note that configurations and processing common to Embodiments 1 to 3 will not be described. 【0235】[Configuration and Processing of Security System 100-4] The configuration and processing of security system 100-4 according to Embodiment 4 will be described using Figure 16. Figure 16 is a diagram showing an example of the configuration and processing of security system 100-4 according to Embodiment 4. Below, an example of the overall configuration of security system 100-4, an example of the processing of security system 100-4, and the effects of security system 100-4 will be described. 【0236】 (1. Example of Security System 100-4 Configuration) The security system 100-4 shown in Figure 16 has on-board devices 10-4 (10-3A, 10-3B, ...) and a server device 20, each mounted on a plurality of vehicles V (VA, VB, ...) that are the targets of monitoring. Here, the installation location and targets of monitoring of the monitoring device of this system are not limited to vehicles, but may be installed on multiple houses, facilities, or equipment, for example, and these may be the targets of monitoring. However, here we will describe the case in which the monitoring device is an on-board device 10-4 mounted on multiple vehicles, as an example of a monitoring device installed on multiple targets. 【0237】 (2. Example of processing by security system 100-4) Firstly, the on-board device 10-4A installed in the vehicle VA detects a suspicious person SP targeting the parked vehicle VA (step S41). For example, the on-board device 10-4A detects a person who does not possess the electronic key of the parked vehicle VA and who has approached the parked vehicle VA within a predetermined distance, peered into the vehicle for a predetermined time or longer, or entered the vehicle. 【0238】 In this case, if the monitoring device of the security system 100-4 is a monitoring device installed in a house, facility, or equipment, the monitoring device will detect suspicious persons (SP) in the house, facility, or equipment. For example, the monitoring device will detect persons who do not possess an electronic key or access pass to the house, facility, or equipment and who have approached (approached) the house, facility, or equipment within a predetermined distance, who have peered into (surveilled) the interior of the house, facility, or equipment for a predetermined period of time or longer, or who have entered (intruded) the interior of the house, facility, or equipment. 【0239】 Secondly, the in-vehicle device 10-4A installed in the vehicle VA estimates the motive of the detected suspicious person SP (step S42). For example, based on the image data and duration of stay of the suspicious person SP, the in-vehicle device 10-4A estimates the motive of the suspicious person SP to be a prankster, a car thief, reconnaissance for a car thief, reconnaissance for vehicle theft, etc. At this time, the in-vehicle device 10-4A identifies the distance traveled by the suspicious person SP if they traveled using a means of transportation corresponding to the estimated motive (e.g., on foot if it's a prankster, by car if it's a car thief) as the area to be monitored. 【0240】 In this case, if the monitoring device of security system 100-4 is a monitoring device installed in a house, facility, or equipment, the monitoring device estimates the motive of the suspicious person SP that it has detected in the house, facility, or equipment. For example, based on the image data and time spent by the suspicious person SP, the monitoring device estimates the motive of the suspicious person SP to be a prankster, theft inside the house, facility, or equipment, reconnaissance for a car break-in, or reconnaissance for theft of the house, facility, or equipment itself. The monitoring device also identifies the distance traveled by the suspicious person SP if they traveled using a means of transportation corresponding to the estimated motive (e.g., walking if it is a prankster, or by car if it is theft inside the house, facility, or equipment) as the area to be monitored for the suspicious person SP. 【0241】 Thirdly, the on-board device 10-4A mounted on vehicle VA transmits alert information to the on-board device 10-4B mounted on vehicle VB located within the identified alert range (step S43). For example, if the on-board device 10-4A estimates that the suspicious person SP's motive is a car break-in, estimates that the suspicious person SP's means of transportation is a car, and identifies the alert range as a distance of 10 km, it estimates multiple possible travel routes from the location of the on-board device 10-4A by car, and transmits alert information to the on-board device 10-4B mounted on vehicle VB located within 10 km (e.g., shortest distance, average distance) when traveling along the estimated multiple travel routes. At this time, the on-board device 10-4A may transmit the alert information directly to the on-board device 10-4B via various communication networks, or it may transmit the alert information to a server device 20, which will then transmit it to the on-board device 10-4B. 【0242】 In this case, if the monitoring device of the security system 100-4 is a monitoring device installed in a house, facility, or equipment, the monitoring device transmits alert information to other monitoring devices installed in other houses, facilities, or equipment located within the specified surveillance range. For example, if the monitoring device estimates that the motive of the suspicious person SP is theft inside a house, facility, or equipment, estimates that the suspicious person SP is traveling by car, and specifies the travel distance of the surveillance range as 10 km, it estimates multiple travel routes that the suspicious person SP could take by car from the location of the monitoring device that detected the suspicious person SP, and transmits alert information to other monitoring devices installed in other houses, facilities, or equipment located within 10 km (e.g., shortest distance, average distance) when traveling along the estimated multiple travel routes. In this case, the monitoring device may transmit the alert information directly to other monitoring devices via various communication networks, or it may transmit the alert information to the server device 20, which will then transmit it to other monitoring devices. 【0243】 Here, "warning information" refers to a signal that requests a change in the warning level setting for the in-vehicle device 10-4B located within the warning range. Similar to the suspicious person information described above, "warning information" indicates that a suspicious person SP has been detected in vehicle V, and includes the detection date and time and the detection result. "Warning information" may also include "suspicious person information," and "warning information" and "suspicious person information" may be substantially the same. Therefore, "suspicious person information" can also be referred to as "warning information." 【0244】 Furthermore, the in-vehicle device 10-4A may, for example, estimate that the suspicious person SP's motive is reconnaissance for theft within the monitored area (e.g., car break-in, theft inside a house, facility, or equipment), identify a security area according to the estimated motive, and transmit alert information. If the same person as the suspicious person SP is detected again, the device will newly estimate that the motive for this crime is theft within the monitored area, identify a new security area according to the newly estimated motive, and transmit new alert information. At this time, the in-vehicle device 10-4A may also transmit the newly estimated motive of the suspicious person SP together with the alert information, or include it in the alert information. 【0245】Fourth, the on-board device 10-4A mounted on vehicle VA transmits alert information to the server device 20 (step S44). For example, if the on-board device 10-4A specifies a travel distance of 10 km as the alert range, and there is no vehicle VB located within 10 km of the on-board device 10-4A, it transmits alert information to the server device 20. Also, if vehicle VB moves within 10 km of the on-board device 10-4A, the server device 20 transmits alert information to the on-board device 10-4B mounted on vehicle VB. Furthermore, if a user U of vehicle VB requests alert information, the server device 20 may transmit alert information to the on-board device 10-4B mounted on vehicle VB regardless of the location of vehicle VB. 【0246】 In this case, if the monitoring device of the security system 100-4 is a monitoring device installed in a house, facility, or equipment, the monitoring device transmits alert information to the server device 20. For example, if the monitoring device specifies a travel distance of 10 km as the alert range, and there are no other houses, facilities, or equipment located within 10 km of the monitoring device that detected the suspicious person SP, it transmits alert information to the server device 20. Furthermore, if the travel distance of the alert range is changed to 20 km and other houses, facilities, or equipment are included in the alert range, the server device 20 transmits alert information to other monitoring devices installed in the other houses, facilities, or equipment. In addition, if a user U of the other house, facility, or equipment requests alert information, the server device 20 may transmit alert information to other monitoring devices installed in the other house, facility, or equipment, regardless of the location of the other house, facility, or equipment. 【0247】 Fifth, the on-board device 10-4B mounted on the vehicle VB changes the alert level set in the on-board device 10-4B (step S45). Here, the alert level refers to the detection settings related to the detection of suspicious persons SP in the monitored area (e.g., proximity detection setting, reconnaissance detection setting, intrusion detection setting). For example, when the on-board device 10-4B receives alert information from the on-board device 10-4A, it raises the set alert level. At this time, the on-board device 10-4B may also choose not to change the alert level, prioritizing the settings made by the user U. 【0248】 In this case, if the monitoring device of security system 100-4 is another monitoring device installed in another house, facility, or equipment, the other monitoring device will change the alert level set on the other monitoring device. For example, if the other monitoring device receives alert information from the monitoring device that detected the suspicious person SP, it will raise its set alert level. In this case, the other monitoring device may also choose not to change the alert level, prioritizing the settings made by user U. 【0249】 (3. Effects of Security System 100-4) As described above, the security system 100-4 performs the following processes. First, the on-board device 10-4A installed in vehicle VA detects a suspicious person SP targeting the parked vehicle VA. Second, the on-board device 10-4A installed in vehicle VA estimates the motive of the detected suspicious person SP and identifies the travel distance which is the warning range for the suspicious person SP. Third, the on-board device 10-4A installed in vehicle VA transmits warning information to the on-board device 10-4B installed in vehicle VB located within the warning range. Fourth, the on-board device 10-4A installed in vehicle VA transmits warning information to the on-board device 10-4B installed in vehicle VB located within the warning range via the server device 20. Fifth, the on-board device 10-4B installed in vehicle VB changes the warning level set in the on-board device 10-4B. Furthermore, surveillance devices installed in homes, facilities, and equipment detect suspicious individuals (SPs) targeting those homes, facilities, and equipment. These surveillance devices also estimate the motive of the detected suspicious individuals and determine the movement range that constitutes the surveillance range for these individuals. These surveillance devices also transmit alert information to other surveillance devices installed in other homes, facilities, and equipment located within the surveillance range. These other surveillance devices then change the alert level set on those devices. 【0250】Therefore, the security system 100-4 has the following effects. First, the security system 100-4 can share information about suspicious persons SP among monitored targets such as vehicles V, houses, facilities, and equipment located within a surveillance range that takes into account topographical factors and the criminal intent of the suspicious persons SP. Second, the security system 100-4 can expand the surveillance range for suspicious persons SP in an amoeba-like manner each time a suspicious person SP is detected at a monitored target such as a vehicle V, house, facility, or equipment. Third, by sharing information via the server device 20, the security system 100-4 can share information about suspicious persons SP even if a monitored target such as a vehicle V, house, facility, or equipment is not within the surveillance range when a suspicious person SP is detected, if it comes into the surveillance range after detection. In other words, the security system 100-4 can prevent the spread of damage caused by suspicious persons SP to monitored targets such as vehicles V, houses, facilities, and equipment. 【0251】 [Configuration and Processing of Each Device in Security System 100-4] The configuration and processing of the in-vehicle device 10-4 of the security system 100-4 according to Embodiment 4 will be described using Figures 17 and 18. Below, an example of the overall configuration of the security system 100-4 according to Embodiment 4 will be described, followed by an example of the configuration and processing of the in-vehicle device 10-1 according to Embodiment 4, and an example of the configuration and processing of the server device 20. 【0252】(1. Example of the overall configuration of security system 100-4) An example of the overall configuration of security system 100-4 according to Embodiment 4 will be described using Figure 17. Figure 17 is a block diagram showing an example of the configuration of security system 100-4 according to Embodiment 4. As shown in Figure 17, security system 100-4 has in-vehicle devices 10-1 (10-4A, 10-4B, 10-4C, ...) and a server device 20, each mounted on a plurality of vehicles V (VA, VB, VC, ...). Each of the in-vehicle devices 10-4 (10-4A, 10-4B, 10-4C, ...) is realized by serverless computing such as B5G, and can perform information sharing, etc., among the plurality of vehicles V (VA, VB, VC, ...). In addition, each of the in-vehicle devices 10-4 (10-4A, 10-4B, 10-4C, ...) is connected to a server device 20, such as a cloud system, via a predetermined communication network. Furthermore, various communication networks such as the internet and dedicated lines can be used as the designated communication network. 【0253】 (2. Configuration Examples and Processing Examples of the On-board Device 10-4) Configuration examples and processing examples of the on-board device 10-4 will be explained using Figure 17. Figure 17 is a block diagram showing a configuration example of the on-board device 10-4 of the security system 100-4 according to Embodiment 4. The on-board device 10-4 is a monitoring device mounted on a mobile body. For example, the on-board device 10-4 may be an on-board device 10-4A mounted on vehicle VA, an on-board device 10-4B mounted on vehicle VB, an on-board device 10-4C mounted on vehicle VC, etc. Alternatively, the on-board device 10-4 may be a monitoring device installed on a target for monitoring, such as a house, facility, or equipment. 【0254】 As shown in Figure 17, the in-vehicle device 10-4 includes a communication unit 11, a storage unit 12-4, and an overall control unit 13. The in-vehicle device 10-4 may also include an input unit (e.g., a touch panel) for receiving various operations from the owner of the in-vehicle device 10-4, and a display unit (e.g., a liquid crystal display) for displaying various information. 【0255】The in-vehicle device 10-4 is, for example, a dedicated terminal mounted on a vehicle V, and consists of a navigation device and a recording device (drive recorder). As one example, the in-vehicle device 10-4 may be a complex device in which an independent navigation device and a recording device are connected in a communicative manner. As another example, the in-vehicle device 10-4 may be a single device having navigation and recording functions. The in-vehicle device 10-4 may also be a device that can be carried by the user U. Furthermore, the in-vehicle device 10-4 may be a monitoring device installed on a target for monitoring, such as a house, facility, or equipment, and may consist of a recording device, etc. 【0256】 Furthermore, the in-vehicle device 10-4 may be equipped with various sensors. For example, the in-vehicle device 10-4 may have various sensors such as a camera, motion sensor, acceleration sensor, gyro sensor, GPS sensor, and barometric pressure sensor. 【0257】 (2-1. Communication Unit 11) The communication unit 11 is implemented by, for example, a NIC. The communication unit 11 is connected to a predetermined communication network by wire or wireless and transmits and receives information with various devices. 【0258】 (2-2. Storage Unit 12-4) The storage unit 12-4 is implemented by, for example, a semiconductor memory element such as RAM or flash memory, or a storage device such as a hard disk or optical disc. The storage unit 12-4 according to Embodiment 4 has, as shown in Figure 17, a user information storage unit 12a, a warning information storage unit 12f, a warning level storage unit 12c, and a crime purpose storage unit 12e. The storage unit 12-4 stores various information that the overall control unit 13 refers to when it operates, and various information acquired when the overall control unit 13 operates. The configuration examples and processing examples of the user information storage unit 12a and the warning level storage unit 12c are the same as in Embodiment 1, so their explanation is omitted. The configuration examples and processing examples of the crime purpose storage unit 12e are the same as in Embodiment 3, so their explanation is omitted. 【0259】(2-2-1. Warning Information Storage Unit 12f) The warning information storage unit 12f stores warning information, including identification information of the monitored target and the server device 20, along with information on suspicious persons detected by the detection unit 13a, which will be described later. Here, an example of the information stored by the warning information storage unit 12f will be explained using Figure 18. Figure 18 is a diagram showing an example of the warning information storage unit 12f of the in-vehicle device 10-4 according to Embodiment 4. In the example in Figure 18, the warning information storage unit 12f has items such as "User ID", "Monitored Target ID", "Server ID", "Detection Date and Time", and "Detection Result". 【0260】 "User ID" indicates identification information for identifying user U. "Monitoring Target ID" indicates identification information for identifying the monitoring target of user U (e.g., vehicle V, residence, facility, equipment). "Server ID" indicates identification information for identifying the server device 20 to which the alert information is sent. "Detection Date and Time" indicates the date and time when the suspicious person SP was detected. "Detection Result" includes the type of suspicious behavior by the suspicious person SP (e.g., approach, reconnaissance, intrusion), location information of the monitoring target, type of monitoring target, image data of the suspicious person SP taken by the in-vehicle device 10-4 or monitoring device, etc. Here, the type of monitoring target is the type of vehicle V, classification of residence (e.g., detached house, apartment), classification of facility (e.g., public facility, company building, highway, railway line), classification of equipment (e.g., shed, warehouse, generator, vending machine), etc. 【0261】 Figure 18 shows an example in which alert information is stored in the alert information storage unit 12f for a user U identified by user ID "UID#1", a monitored target identified by monitored target ID "MID#1", and a server device 20 identified by server ID "SID#1", with the following conditions: {Detection date and time: "Detection date and time #1-1", Detection result: "Detection result #1-1"}, {Detection date and time: "Detection date and time #1-2", Detection result: "Detection result #1-2"}, {Detection date and time: "Detection date and time #1-3", Detection result: "Detection result #1-3"}, ... 【0262】(2-3. Overall Control Unit 13) The overall control unit 13 is implemented by, for example, a CPU or MPU executing various programs (corresponding to an example of a monitoring program) stored in the memory device inside the in-vehicle device 10-4 using RAM as the working area. Alternatively, the overall control unit 13 can be implemented by an integrated circuit such as an ASIC or FPGA. 【0263】 As shown in Figure 17, the overall control unit 13 includes a detection unit 13a, an estimation unit 13b, a specific unit 13c, a transmission unit 13d, a reception unit 13e, and a control unit 13f, and realizes or executes the information processing functions and operations described below. Note that the internal configuration of the overall control unit 13 is not limited to the configuration shown in Figure 17, and other configurations are also acceptable as long as they perform the information processing described later. 【0264】 (2-3-1. Detection Unit 13a) The detection unit 13a detects various types of information. The detection unit 13a stores the detected information in the storage unit 12-4. 【0265】The detection unit 13a detects suspicious persons SPs (Security Personnel) targeting the monitored object according to criteria corresponding to the set alert level. For example, the detection unit 13a detects suspicious persons SPs targeting a moving vehicle V. The detection unit 13a also detects the approach of suspicious persons SPs to the vehicle V on which the vehicle-mounted device 10-4 is installed. The detection unit 13a also detects reconnaissance by suspicious persons SPs targeting the vehicle V on which the vehicle-mounted device 10-4 is installed. The detection unit 13a also detects the intrusion of suspicious persons SPs into the vehicle V on which the vehicle-mounted device 10-4 is installed. The detection unit 13a also detects the approach of suspicious persons SPs to residences, facilities, or equipment where the monitoring device is installed. The detection unit 13a also detects reconnaissance by suspicious persons SPs targeting residences, facilities, or equipment where the monitoring device is installed. The detection unit 13a also detects the intrusion of suspicious persons SPs into residences, facilities, or equipment where the monitoring device is installed. Furthermore, the detection unit 13a detects suspicious persons SP using detection settings controlled by the control unit 13f as the alert level. The detection unit 13a can also detect the type of suspicious activity such as approach, reconnaissance, or intrusion, the location information of the monitored target, the type of monitored target, and image data of the suspicious persons SP captured by the in-vehicle device 10-4 or the monitoring device. The detection unit 13a also stores the suspicious person information related to the detected suspicious persons SP in the alert information storage unit 12f as alert information, which further includes identification information of the monitored target and the server device 20. 【0266】 (2-3-2. Estimation Unit 13b) The estimation unit 13b estimates various types of information. The estimation unit 13b stores the estimated information in the storage unit 12-4. The estimation unit 13b also refers to the information stored in the storage unit 12-4. 【0267】The estimation unit 13b estimates the motive for the crime committed by the detected suspicious person SP. For example, the estimation unit 13b estimates the motive for the crime committed by the detected suspicious person SP using the image data of the detected suspicious person SP. The estimation unit 13b also estimates the motive for the crime committed by the detected suspicious person SP using the time spent there. That is, the estimation unit 13b estimates the motive for the crime committed by the suspicious person SP using at least one of the image data and time spent there of the detected suspicious person SP. In this case, the estimation unit 13b estimates the motive for the crime committed by the suspicious person SP to be a prankster. The estimation unit 13b also estimates the motive for the crime committed by the suspicious person SP to be theft within the monitored area (e.g., car break-in, theft inside a house, facility, or equipment). Furthermore, the estimation unit 13b estimates that the suspicious person SP's motive for the crime is reconnaissance for theft within the monitored area (e.g., car break-in, theft inside a house, facility, or equipment). 【0268】 The estimation unit 13b estimates the movement route from a monitored object where a monitoring device is installed to another monitored object where other monitoring devices are installed. For example, the estimation unit 13b estimates the movement route from a vehicle V equipped with an on-board device 10-4 to another vehicle V' equipped with another on-board device 10-4'. The estimation unit 13b also estimates the movement route from a residence, facility, or equipment where a monitoring device is installed to another residence, facility, or equipment where other monitoring devices are installed. The estimation unit 13b also selects a movement route and corrects the movement speed using received weather information. The estimation unit 13b also selects a movement route and corrects the movement speed using received traffic information. Furthermore, the estimation unit 13b estimates the attributes of the detected suspicious person SP (e.g., gender, age) using the image data of the suspicious person SP and corrects the movement speed. 【0269】 (2-3-3. Identification Unit 13c) The identification unit 13c identifies various types of information. The identification unit 13c stores the identified information in the storage unit 12-4. The identification unit 13c also refers to the information stored in the storage unit 12-4. 【0270】The identification unit 13c identifies a security area based on the presumed motive of the suspicious person SP. For example, the identification unit 13c identifies a security area based on pre-associated security area identification conditions for each motive of the suspicious person SP estimated by the estimation unit 13b. Here, security area identification conditions refer to conditions for identifying a security area corresponding to a pre-set motive of the crime. For example, these are conditions set based on the behavioral tendencies of the suspicious person SP that have a statistically high probability of being identified from an analysis of past crimes, such as the means of transportation, speed of movement, route of movement, and actions before and after the crime, depending on the motive of the crime. In this case, if the identification unit 13c estimates the motive of the suspicious person SP to be a prankster, it refers to the security area identification conditions associated with pranksters and identifies the distance traveled in a predetermined time when traveling on foot at a walking speed along a route that can be traveled on foot. Furthermore, if the specific unit 13c estimates that the suspicious person SP's motive for the crime is theft within the area under surveillance (e.g., car break-in, theft inside a house, facility, or equipment), it will refer to the range identification conditions associated with theft and determine the area of ​​surveillance, including the vehicle V ＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a predetermined time when moving along a movable route. Furthermore, if the identification unit 13c detects the same person as the suspicious person SP whose motive for committing a crime is presumed to be reconnaissance for theft within the monitored area (e.g., car break-in, theft inside a house, facility, or equipment), it refers to the range identification conditions associated with reconnaissance for theft and determines the surveillance range as the vehicle V ＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a predetermined time when moving along a movable route. Furthermore, if the identification unit 13c detects the same person as the suspicious person SP whose motive for committing the crime is presumed to be reconnaissance for the theft of the target of surveillance (e.g., vehicle theft, theft of the house, facility, or equipment itself), it refers to the range identification conditions associated with the theft of the target of surveillance and determines the surveillance range as the vehicle V ＳＰ At the speed of movement, vehicle V ＳＰ This determines the distance traveled in a predetermined time when traveling along a traversable route. 【0271】The identification unit 13c identifies the location of other monitoring devices. For example, the identification unit 13c identifies the location of other in-vehicle devices 10-4'. For example, the identification unit 13c receives location information transmitted from other in-vehicle devices 10-4' and identifies the location of the other in-vehicle devices 10-4' on a map. At this time, the identification unit 13c can also receive location information transmitted from the server device 20 that manages the location information of the in-vehicle devices 10-4' and identify the location of the other in-vehicle devices 10-4' on a map. 【0272】 (2-3-4. Transmitting Unit 13d) The transmitting unit 13d transmits various types of information. The transmitting unit 13d also refers to the various types of information stored in the storage unit 12-4. 【0273】 The transmitting unit 13d transmits alert information to the outside, which is information requesting a change in the alert level to other monitoring devices located within the alert range. For example, the transmitting unit 13d transmits alert information to the outside, which is information requesting a change in the alert level to other in-vehicle devices 10-4' located within the alert range. The transmitting unit 13d also transmits alert information, including suspicious person information regarding the suspicious person SP detected by the detection unit 13a, from the in-vehicle device 10-4 to other in-vehicle devices 10-4' located within the alert range. The transmitting unit 13d also transmits alert information to other in-vehicle devices 10-4' whose travel distance when moving along the estimated travel path is less than or equal to a predetermined value, which is within the alert range. The transmitting unit 13d also transmits alert information to other in-vehicle devices 10-4' whose travel distance when moving along the shortest travel path among multiple estimated travel paths is less than or equal to a predetermined value, which is within the alert range. Furthermore, the transmitting unit 13d transmits alert information to other in-vehicle devices 10-4' located within a controlled alert range, where the average distance traveled when moving along multiple estimated movement paths is less than or equal to a predetermined value. Also, if the in-vehicle device 10-4 detects a suspicious person (SP), the transmitting unit 13d transmits alert information to other in-vehicle devices 10-4' located within a predetermined distance range, which is a controlled alert range. Note that the transmission of alert information to other in-vehicle devices 10-4' may be done directly without going through the server device 20, or it may be transmitted indirectly via the server device 20. 【0274】Furthermore, the transmitting unit 13d transmits alert information to the server device 20 if there are no other monitoring devices located within the alert range. For example, the transmitting unit 13d transmits alert information to the server device 20 if there are no other in-vehicle devices 10-4' located within the alert range. 【0275】 Furthermore, the transmitting unit 13d transmits information requiring attention, such as the type of suspicious activity by the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of the target of surveillance, the type of target of surveillance, and image data of the suspicious person SP captured by the surveillance device. At this time, the transmitting unit 13d refers to the information requiring attention stored in the information requiring attention storage unit 12f. The transmitting unit 13d can also refer to the user information stored in the user information storage unit 12a. The transmitting unit 13d can also refer to the crime motive of the suspicious person SP stored in the crime motive storage unit 12e. 【0276】 (1-3-5. Receiving Unit 13e) The receiving unit 13e receives various types of information. The receiving unit 13e stores the received information in the storage unit 12-4. 【0277】 The receiving unit 13e receives alert information transmitted from other monitoring devices. For example, the receiving unit 13e receives alert information transmitted from other in-vehicle devices 10-4'. The receiving unit 13e also receives alert information transmitted from other monitoring devices via the server device 20. For example, the receiving unit 13e receives alert information transmitted from other in-vehicle devices 10-4' via the server device 20. The receiving unit 13e also receives location information transmitted from other in-vehicle devices 10-4'. The receiving unit 13e can also store alert information transmitted from other in-vehicle devices 10-4' in the alert information storage unit 12f. 【0278】 (2-3-6. Control Unit 13f) The control unit 13f performs various controls. The control unit 13f also refers to various information stored in the storage unit 12-4. 【0279】The control unit 13f changes the alert level based on alert information. For example, when the control unit 13f receives alert information transmitted from another monitoring device, it changes the alert level set on the monitoring device based on the alert information. Also, when the control unit 13f receives alert information transmitted from another in-vehicle device 10-4', it changes the alert level set on the in-vehicle device 10-4 based on the alert information. Also, when the control unit 13f receives alert information transmitted from another in-vehicle device 10-4' via the server device 20, it changes the alert level set on the in-vehicle device 10-4 based on the alert information. At this time, if the user U of vehicle V has permitted a change in the alert level, the control unit 13f raises the alert level set on the in-vehicle device 10-4 to a higher level. Also, if the user U of vehicle V has not permitted a change in the alert level, the control unit 13f maintains the alert level set on the in-vehicle device 10-4. 【0280】 The control unit 13f sets the alert level. For example, the control unit 13f sets the alert level specified by the user U operating the monitoring device. At this time, the control unit 13f controls the detection settings related to the detection of suspicious persons SP on the monitored object on which the monitoring device is installed, as the alert level. For example, the control unit 13f controls the detection settings related to the detection of suspicious persons SP on the vehicle V on which the vehicle-mounted device 10-4 is installed, as the alert level. The control unit 13f also controls the detection settings related to the detection of approach, reconnaissance, and intrusion of suspicious persons SP on the vehicle V on which the vehicle-mounted device 10-4 is installed, as the alert level. The control unit 13f also controls a predetermined travel distance set for the vehicle-mounted device 10-4, as the alert level. Furthermore, the control unit 13f controls a predetermined travel distance set for the vehicle-mounted device 10-4, as the alert level, according to the attributes of the estimated suspicious persons SP. Furthermore, the control unit 13f changes the alert level according to the actions of the suspicious person SP (e.g., approach, reconnaissance, intrusion) indicated by the alert information received by the receiving unit 13e from other monitoring devices. Also, the control unit 13f changes the alert level according to the type of surveillance target (e.g., vehicle type V, residence classification, facility classification, equipment classification) indicated by the alert information received by the receiving unit 13e from other monitoring devices. 【0281】 (3. Configuration and Processing Examples of Server Device 20) Configuration and processing examples of the server device 20 will be explained using Figure 16. The server device 20 receives alert information transmitted from a monitoring device that has detected a suspicious person SP targeting the monitored target. For example, the server device 20 receives alert information transmitted from an in-vehicle device 10-4 that has detected a suspicious person SP targeting the monitored target. The server device 20 also transmits the received alert information to other monitoring devices. For example, the server device 20 transmits the received alert information to another in-vehicle device 10-4'. In this case, if a user U of the monitoring device requests alert information, the server device 20 may transmit the alert information to a monitoring device mounted on the monitored target regardless of the location of the monitored target. 【0282】 (4. Specific Examples of Each Process of Security System 100-4) Specific examples of each process of security system 100-4 according to Embodiment 4 will be described below. Specific examples of the suspicious person detection process, crime intent estimation process, alert information transmission process, and alert level change process of security system 100-4 according to Embodiment 4 will be described below. 【0283】 (4-1. Specific Examples of Suspicious Person Detection Processing) The suspicious person detection processing of the security system 100-4 according to Embodiment 4 will be described. In addition to detecting the "approach," "reconnaissance," and "intrusion" of suspicious persons SP towards the vehicle V in Embodiments 1 to 3, the security system 100-4 can also perform the detection of the "approach," "reconnaissance," and "intrusion" of suspicious persons SP towards residences, facilities, and equipment as monitoring targets. That is, the security system 100-4 can perform the detection of the "approach," "reconnaissance," and "intrusion" of suspicious persons SP according to the set detection settings by monitoring devices installed in the vehicle V, residences, facilities, equipment, etc. 【0284】(4-2. Specific Examples of Criminal Purpose Estimation Processing) The criminal purpose estimation processing of the security system 100-4 according to Embodiment 4 will be described. In addition to estimating the "prankster," "car thief," and "reconnaissance for car thief" of a suspicious person SP targeting vehicle V in Embodiment 3, the security system 100-4 can also perform the estimation of "reconnaissance for vehicle theft." The following describes the case where there is an on-board device 10-4A mounted on vehicle VA and an on-board device 10-4B mounted on vehicle VB. Note that explanations common to the criminal purpose estimation processing of the security system 100-3 according to Embodiment 3 will be omitted. 【0285】 The in-vehicle device 10-4A analyzes the image data and dwell time of the suspicious person SP captured by the camera and estimates the suspicious person SP's motive for the crime to be "prankster." Here, a suspicious person SP whose motive is prankster tends to be more vigilant of their surroundings than the vehicle VA, regardless of the vehicle type, and tends to focus their gaze on the surroundings. Also, a suspicious person SP whose motive is prankster tends to have a short dwell time from approaching the vehicle VA until leaving it. Furthermore, a suspicious person SP whose motive is prankster may have an unsteady gait due to being under the influence of alcohol or intoxicated. For these reasons, the in-vehicle device 10-4A analyzes the image data and dwell time of the suspicious person SP based on the above characteristics and estimates the suspicious person SP's motive for the crime to be "prankster." In addition, pranksters tend to cause similar incidents to occur repeatedly in a relatively small area within a short period of time. Therefore, if the in-vehicle device 10-4A estimates that the suspicious person's motive for the crime is "a prank," it will narrow the area of ​​vigilance to a relatively small range. 【0286】The in-vehicle device 10-4A analyzes the image data and dwell time of the suspicious person SP captured by the camera and estimates the suspicious person SP's motive for the crime to be "reconnaissance for car break-ins." Here, a suspicious person SP whose motive is reconnaissance for car break-ins tends to focus their gaze on the dashboard and seats, as they check for the presence of valuables left inside the vehicle VA. Also, a suspicious person SP whose motive is reconnaissance for car break-ins tends to have a short observation time and a relatively short dwell time because it is a reconnaissance mission. For this reason, the in-vehicle device 10-4A analyzes the image data and dwell time based on the above characteristics and estimates the suspicious person SP's motive for the crime to be "reconnaissance for car break-ins." Such reconnaissance tends to be carried out repeatedly in a relatively small area over a short period of time. Therefore, if the in-vehicle device 10-4A estimates that the suspicious person's motive is "reconnaissance for car theft," it will narrow the area of ​​surveillance to a relatively small range. 【0287】The in-vehicle device 10-4A analyzes the image data and dwell time of the suspicious person SP captured by the camera and estimates the suspicious person SP's motive for the crime to be "car break-in." Here, the suspicious person SP whose motive is car break-in enters the vehicle VA and searches the interior. Therefore, the in-vehicle device 10-4A analyzes the image data and dwell time based on the above characteristics and estimates the suspicious person SP's motive for the crime to be "car break-in." In addition, since car break-ins often involve confirming escape routes in advance, similar incidents tend to occur repeatedly in a relatively narrow area within a short period of time. On the other hand, if the stolen items are large items (e.g., car navigation systems, tools), it can be assumed that the car is used as a means of transportation, so car break-ins may occur in a relatively wide area. Therefore, if the in-vehicle device 10-4A estimates that the suspicious person SP's motive is "car break-in," it will narrow the area of ​​vigilance, and if the stolen item is a large item, it will narrow the area of ​​vigilance. Furthermore, if the in-vehicle device 10-4A estimates that the suspicious person SP's motive is "reconnaissance for car break-in," and then detects the same suspicious person SP again, it is highly likely that the suspicious person SP has returned to carry out the car break-in after conducting reconnaissance. In this case, at the stage when the in-vehicle device 10-4A detects the same suspicious person SP again, it can estimate that the suspicious person SP's motive is "car break-in" and narrow the area of ​​vigilance. 【0288】The in-vehicle device 10-4A analyzes the image data and dwell time of the suspicious person SP captured by the camera and estimates the suspicious person SP's motive for the crime to be "reconnaissance for vehicle theft." Here, a suspicious person SP whose motive is reconnaissance for vehicle theft tends to focus their gaze on the exterior of the vehicle VA in order to confirm the make, model year, grade, etc. Also, a suspicious person SP whose motive is reconnaissance for vehicle theft tends to focus their gaze on the area around the instrument panel in order to check for the presence or absence of a security system. Furthermore, a suspicious person SP whose motive is reconnaissance for vehicle theft tends to spend more time observing and staying in the area than a suspicious person reconnaissance for car break-ins. For these reasons, the in-vehicle device 10-4A analyzes the image data and dwell time based on the above characteristics and estimates the suspicious person SP's motive for the crime to be "reconnaissance for vehicle theft." Furthermore, vehicle thefts following reconnaissance tend to target specific vehicle models, and perpetrators often travel in vehicles with accomplices to search for these specific models, thus tending to occur over a relatively wide area. For this reason, if the in-vehicle device 10-4A estimates that the suspicious person SP's motive is "reconnaissance for vehicle theft," it will specify a relatively wide area of ​​vigilance. Also, if the in-vehicle device 10-4A detects the same suspicious person SP again after estimating that the suspicious person SP's motive is "reconnaissance for vehicle theft," it is highly likely that the suspicious person SP has returned to carry out the vehicle theft after conducting reconnaissance. In this case, the in-vehicle device 10-4A can estimate the suspicious person SP's motive as "vehicle theft" at the stage of detecting the same suspicious person SP again, and specify a relatively wide area of ​​vigilance. In addition, if vehicle VB is the same vehicle model as vehicle VA, the in-vehicle device 10-4A can change the vigilance level to a higher level. 【0289】 Furthermore, in addition to estimating the motive of a suspicious person SP against vehicle V in Embodiment 3, the security system 100-4 can also perform estimating the motive of a suspicious person SP against residences, facilities, and equipment as targets of surveillance. 【0290】(4-3. Specific Examples of the Suspicious Person Information Transmission Process) The suspicious person information transmission process of the security system 100-4 according to Embodiment 4 will be described. In addition to the transmission of suspicious person information from vehicle V to other vehicle V' as in Embodiments 1 to 3, the security system 100-4 can also transmit suspicious person information from vehicle V to other vehicle V' via the server device 20. The following description will focus on the case where there is an on-board device 10-4A mounted on vehicle VA and an on-board device 10-4B mounted on vehicle VB. Explanations common to the suspicious person information transmission process of the security system 100-1 according to Embodiment 1 will be omitted. 【0291】 If the in-vehicle device 10-4A detects a suspicious person SP, identifies a security area of ​​5 km, and identifies a travel distance of 2 km from vehicle VA to vehicle VB, it transmits alert information to the in-vehicle device 10-4B. At this time, the in-vehicle device 10-4A transmits the type of suspicious activity by the suspicious person SP (e.g., approach, reconnaissance, intrusion), the location information of vehicle V, the type of vehicle V, and image data of the suspicious person SP taken by the in-vehicle device 10-4A. The in-vehicle device 10-4A may also estimate the attributes of the suspicious person SP, such as gender and age, based on the image data of the suspicious person SP and transmit this as alert information. The in-vehicle device 10-4A may also transmit the estimated motive and means of transportation of the suspicious person SP along with the alert information. 【0292】 If the in-vehicle device 10-4A detects a suspicious person SP, identifies a security range of 5 km, and identifies a travel distance of 6 km from vehicle VA to vehicle VB, it does not send security alert information to the in-vehicle device 10-4B, but instead sends security alert information to the server device 20. On the other hand, if vehicle VB moves within 5 km of the in-vehicle device 10-4A, the server device 20 sends security alert information to the in-vehicle device 10-4B installed in vehicle VB. Furthermore, if the security range is changed to 10 km and vehicle VB is included in the security range, the server device 20 sends security alert information to the in-vehicle device 10-4B installed in vehicle VB. In addition, if user U of vehicle VB requests security alert information, the server device 20 may send security alert information to the in-vehicle device 10-4B installed in vehicle VB regardless of the location of vehicle VB. 【0293】 As described above, the on-board device 10-4 installed in vehicle V enables flexible transmission of alert information via the server device 20 in accordance with the location of vehicle V where a suspicious person SP has been detected and the expansion or contraction of the alert area. 【0294】 Furthermore, in addition to transmitting alert information between vehicles V as in Embodiment 3, security system 100-4 can also transmit alert information between monitored objects such as houses, facilities, and equipment. Security system 100-4 can transmit alert information between monitoring devices regardless of the monitored object. In other words, security system 100-4 enables the sharing of information about suspicious persons (SP) between monitored objects such as vehicles V, houses, facilities, and equipment. 【0295】 (4-4. Specific Examples of Alert Level Change Processing) The alert level change processing of the security system 100-4 according to Embodiment 4 will be described below. The following description will cover the cases where there is an on-board device 10-4A mounted on vehicle VA, an on-board device 10-4B mounted on vehicle VB, an on-board device 10-4C mounted on vehicle VC, an on-board device 10-4D mounted on vehicle VD, and an on-board device 10-4E mounted on vehicle VE. Explanations that are common to the alert level control processing of the security system 100-1 according to Embodiment 1 will be omitted. 【0296】 Firstly, the in-vehicle device 10-4A detects a suspicious person (SP) and transmits alert information from the in-vehicle device 10-4A to the in-vehicle devices 10-4B, 10-4C, and 10-4D, which are located within the surveillance range. At this time, the in-vehicle device 10-4B receives the alert information from the in-vehicle device 10-4A and raises its alert level. The in-vehicle device 10-4C also receives the alert information from the in-vehicle device 10-4A and raises its alert level. The in-vehicle device 10-4D also receives the alert information from the in-vehicle device 10-4A and raises its alert level. Here, the group of devices that receive the alert information from the in-vehicle device 10-4A and raise the alert level is called the "first monitoring device group." 【0297】Secondly, if the in-vehicle devices 10-4B, 10-4C, and 10-4D have not detected any suspicious persons (SP) for a predetermined period of time (e.g., a timer of 30 minutes) or longer, and have not received any alert information from other in-vehicle devices for a predetermined period of time or longer, they will reset their alert levels to their previous state. In other words, if the first monitoring group has received alert information and has not detected any suspicious persons (SP) for a predetermined period of time, and has not received any alert information from other in-vehicle devices, they will simultaneously reset their alert levels to their previous state. 【0298】 Thirdly, if the in-vehicle device 10-4B detects a suspicious person (SP) before a predetermined time has elapsed, it transmits alert information from the in-vehicle device 10-1B to the in-vehicle devices 10-4C and 10-4E located within the alert range. Here, the group of devices that receive alert information from the in-vehicle device 10-4B and raise the alert level is referred to as the "second monitoring device group." At this time, the in-vehicle device 10-4E raises the alert level. The in-vehicle device 10-4C also initializes its timer and maintains the raised alert level for another 30 minutes. On the other hand, the in-vehicle device 10-4D, which did not receive alert information from the in-vehicle device 10-4B, returns the alert level to its previous state after 30 minutes without initializing its timer. In other words, the in-vehicle device 10-4C, which is part of the first monitoring device group and is also included in the second monitoring device group, initializes its timer and maintains the alert level. On the other hand, the in-vehicle device 10-4D, which is part of the first monitoring device group and is not included in the second monitoring device group, does not initialize its timer. 【0299】 Alternatively, in the security system 100-4, if the in-vehicle device 10-4B detects a suspicious person SP before a predetermined time (e.g., timer 30 minutes) has elapsed since receiving alert information from the in-vehicle device 10-4A, the timer of the first monitoring device group, which was started upon receiving alert information from the in-vehicle device 10-4A, may be initialized, and the second monitoring device group, which received alert information transmitted by the in-vehicle device 10-4B, may be integrated with the first monitoring device group to expand the entire monitoring range. 【0300】Furthermore, the in-vehicle device 10-4, which has transmitted a warning alert after detecting a suspicious person (SP), may also be configured to transmit cancellation information to the recipient of the warning alert, indicating the cancellation of the warning alert. For example, suppose the in-vehicle device 10-4 mistakenly detects a person who is not suspicious as a suspicious person (SP). In this case, when the in-vehicle device 10-4 receives an operation from the owner of the in-vehicle device 10-4 to cancel the detection of the suspicious person (SP), it transmits cancellation information to the recipient of the warning alert. In this way, the security system 100-4 can avoid surrounding in-vehicle devices unnecessarily increasing their monitoring level. 【0301】 As described above, the on-board device 10-4 installed in vehicle V enables the detection of suspicious persons (SP) and flexible adjustment of the alert level according to the passage of time. 【0302】 Furthermore, in addition to controlling the alert level between vehicles V as in Embodiment 3, security system 100-4 can also change the alert level between monitored objects such as houses, facilities, and equipment. Security system 100-4 can change the alert level between monitoring devices regardless of the monitored object. In other words, security system 100-4 enables the change of the alert level by suspicious person SP between monitored objects such as vehicles V, houses, facilities, and equipment. 【0303】 [Processing Flow of Security System 100-4] The processing flow of the security system 100-4 according to Embodiment 4 will be explained using Figure 19. Figure 19 is a flowchart showing an example of the processing flow of the security system 100-4 according to Embodiment 4. Note that the processes in steps S401 to S408 below can be executed in a different order. Also, some of the processes in steps S401 to S408 below may be omitted. 【0304】 (1. Suspicious Person Detection Process) Firstly, the in-vehicle device 10-4 performs a suspicious person detection process (step S401). For example, the in-vehicle device 10-4 detects the approach, reconnaissance, intrusion, etc., of a suspicious person SP to the vehicle V. 【0305】(2. Crime Purpose Estimation Process) Secondly, the in-vehicle device 10-4 performs crime purpose estimation processing (step S402). For example, the in-vehicle device 10-4 estimates the crime purpose of the detected suspicious person SP as a prankster, a car burglar, reconnaissance for a car burglar, reconnaissance for vehicle theft, etc. 【0306】 (3. Security Area Identification Process) Thirdly, the vehicle-mounted device 10-4 performs security area identification processing (step S403). For example, the vehicle-mounted device 10-4 identifies the distance traveled when moving at an average speed using a means of transportation corresponding to the estimated criminal purpose as the security area for the suspicious person SP. 【0307】 (4. Movement Path Estimation Processing) Fourth, the on-board device 10-4 performs movement path estimation processing (step S404). For example, the on-board device 10-4 identifies the location of other on-board devices 10-4' and estimates the movement path from vehicle V to other vehicle V' that can be moved by the estimated means of transport. 【0308】 (5. Warning Information Transmission Process) Fifth, the in-vehicle device 10-4 performs warning information transmission processing (step S405). For example, the in-vehicle device 10-4 directly transmits warning information to an in-vehicle device 10-4' installed in another vehicle V' located at a distance of less than or equal to a predetermined value along the travel route. Alternatively, the in-vehicle device 10-4 indirectly transmits warning information to an in-vehicle device 10-4' installed in another vehicle V' via the server device 20. 【0309】 (6. Processing of receiving warning information) Sixth, the other in-vehicle device 10-4' performs processing of receiving warning information (step S406). For example, the other in-vehicle device 10-4' directly receives the warning information transmitted from the in-vehicle device 10-4. Alternatively, the other in-vehicle device 10-4' indirectly receives the warning information transmitted from the in-vehicle device 10-4 via the server device 20. 【0310】(7. Alert Level Change Processing) Seventh, the other in-vehicle devices 10-4' perform alert level change processing (step S407). For example, the other in-vehicle devices 10-4' change or maintain the detection settings or the predetermined travel distance which is the alert range as the set alert level. At this time, if the sharing of alert information among all in-vehicle devices 10-4 is completed (step S408: Yes), the in-vehicle device 10-4 terminates processing. On the other hand, if the sharing of alert information among all in-vehicle devices 10-4 is not completed (step S408: No), the in-vehicle device 10-4 returns to processing in step S404. 【0311】 Up to this point, in Embodiment 4, the vehicle-mounted device 10-4 has been described as determining the surveillance range for the suspicious person SP based on the assumption that the suspicious person SP moves by means of transportation corresponding to the estimated criminal purpose. In addition to this, if the vehicle-mounted device 10-4 can identify the means of transportation of the suspicious person SP from the image captured by the camera of the vehicle-mounted device 10-4, it may prioritize adopting the means of transportation identified based on the image captured by the camera over the means of transportation corresponding to the estimated criminal purpose. In this case, for example, if the camera of the vehicle-mounted device 10-4 captures a scene of the suspicious person SP leaving on a bicycle, the distance traveled if the person travels at the average speed of a bicycle for a predetermined time can be determined as the surveillance range for the suspicious person SP. 【0312】 [Effects of Embodiment 4] The effects of Embodiment 4 will now be described. Below, effects 1 to 9 corresponding to each process in Embodiment 4 will be described. 【0313】 (1. Effect 1) Firstly, in the process according to Embodiment 4 described above, the monitoring device sets an alert level, detects suspicious persons SPs targeting the monitored object according to the criteria corresponding to the set alert level, estimates the purpose of the detected suspicious persons SPs, identifies the alert range based on the estimated purpose of the suspicious persons SPs, and transmits alert information to the outside, which is information requesting other monitoring devices located within the alert range to change their alert levels. Therefore, in this process, alert information indicating that suspicious persons SPs have been detected can be transmitted to the outside, making it possible to prevent the spread of damage caused by suspicious persons SPs to monitored objects such as vehicles V. 【0314】 (2. Effect 2) Secondly, in the process according to Embodiment 4 described above, the monitoring device receives alert information transmitted from other monitoring devices and changes the alert level based on the alert information. Therefore, in this process, alert information can be transmitted according to the location of the monitored target where the suspicious person SP has been detected and the expansion or contraction of the alert range, so it is possible to prevent the damage caused by the suspicious person SP to monitored targets such as vehicles V from escalating. 【0315】 (3. Effect 3) Thirdly, in the process according to Embodiment 4 described above, the monitoring device estimates the purpose of the suspicious person SP using at least one of the image data and the time spent by the detected suspicious person SP. Therefore, in this process, the purpose of the crime of the suspicious person SP estimated based on image analysis or time spent can be transmitted along with warning information, thus preventing the damage caused by the suspicious person SP to the monitored target such as the vehicle V from escalating. 【0316】 (4. Effect 4) Fourth, in the process according to Embodiment 4 described above, the monitoring device identifies the area of ​​vigilance based on the area identification conditions associated with each presumed motive for the crime of the suspicious person SP. Therefore, in this process, the area of ​​vigilance can be identified according to the presumed motive for the crime of the suspicious person SP, thus preventing the damage caused by the suspicious person SP to the monitored target, such as the vehicle V. 【0317】 (5. Effect 5) Fifth, in the process according to Embodiment 4 described above, when the monitoring device estimates that the suspicious person's purpose is that of a prankster, it identifies a range as the area within the distance traveled in a predetermined time when traveling at a walking speed along a travel route that is traversable on foot. Therefore, in this process, since the area of ​​caution can be identified when the estimated suspicious person SP is a prankster, it is possible to prevent the damage caused by the suspicious person SP to the monitored target, such as vehicle V. 【0318】 (6. Effect 6) Sixth, in the process according to Embodiment 4 described above, if the purpose of the suspicious person SP is presumed to be theft within the area under surveillance, the monitoring device will check the vehicle V ＳＰ At the speed of movement, vehicle V ＳＰThis identifies the range within a predetermined time period of travel distance when moving along a possible travel route. Therefore, this process can identify the area of ​​vigilance if the estimated suspicious person SP is committing theft within the monitored area, thereby preventing the damage caused by the suspicious person SP to the monitored area, such as vehicle V. 【0319】 (7. Effect 7) Seventh, in the process according to Embodiment 4 described above, the monitoring device controls the detection settings for detecting suspicious persons SP against the monitored target as an alert level, and detects suspicious persons SP using the controlled detection settings. Therefore, in this process, the detection settings of the monitoring device can be controlled after considering geographical factors and the criminal intent of the suspicious persons SP, so it is possible to prevent the damage caused by suspicious persons SP to monitored targets such as vehicles V from escalating. 【0320】 (8. Effect 8) Eighth, in the process according to Embodiment 4 described above, the monitoring device changes the alert level in response to the actions of the suspicious person SP indicated by the alert information received from other monitoring devices. Therefore, in this process, the alert level of the monitoring device can be controlled by further utilizing the maliciousness of the suspicious person SP's suspicious actions, taking into account geographical factors and the suspicious person SP's motives for committing the crime, thereby preventing the damage caused by the suspicious person SP to the monitored target, such as the vehicle V. 【0321】 (9. Effect 9) Ninthly, in the process according to Embodiment 4 described above, the monitoring device changes the alert level according to the type of target being monitored indicated by the alert information received from other monitoring devices. Therefore, in this process, the alert level of the monitoring device can be controlled by further utilizing the type of target being monitored, such as a specific vehicle, that the suspicious person SP is targeting, taking into account geographical factors and the intent of the suspicious person SP's crime, thereby preventing the damage caused by the suspicious person SP to the target being monitored, such as vehicle V. 【0322】[Hardware Configuration] Furthermore, terminals and monitoring devices such as the in-vehicle devices 10 (10-1, 10-2, 10-3, 10-4) according to the embodiments 1 to 4 described above are realized by a computer 1000 having a configuration such as that shown in Figure 20. The following explanation will use the in-vehicle device 10 as an example. Figure 20 is a hardware configuration diagram showing an example of a computer that realizes the functions of the in-vehicle devices 10 of embodiments 1 to 4. The computer 1000 has a CPU 1100, RAM 1200, ROM 1300, HDD 1400, communication interface (I / F) 1500, input / output interface (I / F) 1600, and media interface (I / F) 1700. 【0323】 The CPU 1100 operates based on programs stored in the ROM 1300 or HDD 1400, and controls various parts. The ROM 1300 stores boot programs executed by the CPU 1100 when the computer 1000 starts up, as well as programs that depend on the computer 1000's hardware. 【0324】 The HDD 1400 stores programs executed by the CPU 1100, and data used by such programs. The communication interface 1500 receives data from other devices via a predetermined communication network and sends it to the CPU 1100, and transmits data generated by the CPU 1100 to other devices via the predetermined communication network. 【0325】 The CPU 1100 controls output devices such as displays and printers, and input devices such as keyboards and mice, via the input / output interface 1600. The CPU 1100 acquires data from input devices via the input / output interface 1600. The CPU 1100 also outputs the generated data to output devices via the input / output interface 1600. 【0326】The media interface 1700 reads a program or data stored in the recording medium 1800 and provides it to the CPU 1100 via the RAM 1200. The CPU 1100 loads the program from the recording medium 1800 onto the RAM 1200 via the media interface 1700 and executes the loaded program. The recording medium 1800 is, for example, an optical recording medium such as a DVD (Digital Versatile Disc) or PD (Phase Change Rewritable Disk), a magneto-optical recording medium such as an MO (Magneto-Optical disk), a tape medium, a magnetic recording medium, or a semiconductor memory. 【0327】 For example, when the computer 1000 functions as an in-vehicle device 10 according to embodiments 1 to 4, the CPU 1100 of the computer 1000 realizes the functions of the overall control unit 13 by executing programs loaded on the RAM 1200. The CPU 1100 of the computer 1000 reads and executes these programs from the recording medium 1800, but as another example, these programs may be obtained from other devices via a predetermined communication network. 【0328】 [Other] Furthermore, among the processes described in each of the above embodiments, all or part of the processes described as being performed automatically can be performed manually, or all or part of the processes described as being performed manually can be performed automatically by known methods. In addition, the processing procedures, specific names, and information including various data and parameters shown in the above document and drawings can be changed at will unless otherwise specified. For example, the various information shown in each figure is not limited to the information shown. 【0329】 Furthermore, the components of each illustrated device are functionally conceptual and do not necessarily need to be physically configured as shown. In other words, the specific forms of distribution and integration of each device are not limited to those shown, and all or part of them can be functionally or physically distributed and integrated in any unit according to various loads and usage conditions. 【0330】Furthermore, the above embodiments can be combined as appropriate, provided that the processing content is not contradictory. 【0331】 Although some embodiments of the present invention have been described in detail above with reference to the drawings, these are illustrative examples, and the present invention can be implemented in various other forms with modifications and improvements based on the knowledge of those skilled in the art, starting with the embodiments described in the disclosure section of the invention. 【0332】 Furthermore, the terms "section, module, unit" mentioned above can be replaced with "means" or "circuit," etc. For example, the receiving unit can be replaced with receiving means or receiving circuit. 【0333】 10, 10-1, 10-2, 10-3, 10-4 In-vehicle device 11 Communication unit 12-1, 12-2, 12-3, 12-4 Storage unit 12a User information storage unit 12b Suspicious person information storage unit 12c Alert level storage unit 12d Means of transportation storage unit 12e Criminal intent storage unit 12f Warning information storage unit 13 Overall control unit 13a Detection unit 13b Estimation unit 13c Identification unit 13d Transmission unit 13e Receiving unit 13f Control unit 20 Server device 100-1, 100-2, 100-3, 100-4 Security system 1000 Computer 1100 CPU 1200 RAM 1300 ROM 1400 HDD 1500 Communication interface (I / F) 1600 Input / Output Interface (I / F) 1700 Media Interface (I / F) 1800 Recording Media

Claims

1. A monitoring device comprising: a control unit for setting an alert level; a detection unit for detecting suspicious individuals targeting a monitoring target according to criteria corresponding to the set alert level; an estimation unit for estimating the purpose of the detected suspicious individuals; a specification unit for identifying an alert range based on the estimated purpose of the suspicious individuals; and a transmission unit for transmitting alert information, which is information requesting a change in the alert level to other monitoring devices located within the alert range, to the outside.

2. The monitoring device according to claim 1, further comprising a receiving unit that receives the alert information transmitted from the other monitoring device, wherein the control unit changes the alert level based on the alert information.

3. The monitoring device according to claim 1, characterized in that the estimation unit estimates the purpose of the suspicious person using at least one of the detected image data and the time spent by the suspicious person.

4. The monitoring device according to any one of claims 1 to 3, characterized in that the identification unit identifies the surveillance range based on range identification conditions associated with each purpose of the suspicious person estimated by the estimation unit.

5. The monitoring device according to any one of claims 1 to 3, characterized in that, when the estimation unit estimates that the purpose of the suspicious person is a prank, the surveillance range is defined as an area within a predetermined distance traveled in a specified time when traveling at a walking speed along a travel route that can be traveled on foot.

6. The monitoring device according to any one of claims 1 to 3, characterized in that, when the estimation unit estimates that the purpose of the suspicious person is theft within the area under surveillance, the surveillance area specifies a range within a predetermined travel distance when traveling along a travel route that can be traveled by the vehicle at the vehicle's travel speed.

7. The monitoring device according to any one of claims 1 to 3, wherein the control unit controls the detection setting for detecting the suspicious person to be monitored as the alert level, and the detection unit detects the suspicious person using the controlled detection setting.

8. The monitoring device according to claim 2, characterized in that the control unit changes the alert level in response to the actions of the suspicious person indicated by the alert information received by the receiving unit from another monitoring device.

9. The monitoring device according to claim 2, characterized in that the control unit changes the alert level according to the type of monitoring target indicated by the alert information received by the receiving unit from another monitoring device.

10. A monitoring method performed by a monitoring device installed on a target to be monitored, comprising: a detection step of detecting a suspicious person to the target to be monitored according to a set alert level; an estimation step of estimating the purpose of the detected suspicious person; a identification step of identifying an alert range based on the estimated purpose of the suspicious person; and a transmission step of transmitting alert information, which is information requesting a change in the alert level to other monitoring devices located within the alert range, to an external party.

11. A monitoring program to be executed by a monitoring device installed on a target being monitored, comprising: a detection procedure for detecting a suspicious person on the target being monitored according to a set alert level; an estimation procedure for estimating the purpose of the detected suspicious person; an identification procedure for identifying an alert range based on the estimated purpose of the suspicious person; and a transmission procedure for transmitting alert information, which is information requesting a change in alert level to other monitoring devices located within the alert range, to an external source.

12. A monitoring system comprising a plurality of monitoring devices installed on each of a plurality of monitored targets, wherein each of the plurality of monitoring devices comprises: a detection unit that detects a suspicious person to the monitored target according to a set alert level; an estimation unit that estimates the purpose of the detected suspicious person; an identification unit that identifies an alert range based on the estimated purpose of the suspicious person; and a transmission unit that transmits alert information to the outside, which is information requesting a change in the alert level to other monitoring devices located within the alert range.

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