Road surface monitoring device

Abstract

To provide a road surface monitoring device that is able to accurately grasp a road surface condition.SOLUTION: A server 80 acquires travel data of a plurality of vehicles. Based on acceleration data of the vehicles and the position data of the vehicles included in the travel data, the server 80 selects a point at which a proportion of vehicles that have detected road damage is equal to or higher than a predetermined value. The server 80 acquires traveling data from vehicles that match a predetermined condition among the vehicles traveling at the selected point.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a road surface monitoring device. [Background technology]

[0002] For example, managers who maintain various roads, businesses that undertake road maintenance, and construction companies that undertake repair work for damaged roads need to know the status of each road under their management. Therefore, it is common for managers of each road to, for example, periodically patrol and perform tasks to visually check the status of the road surface, etc. Also, a technology has been proposed that identifies the road surface condition by actually running a vehicle on the target road (for example, Patent Document 1).

[0003] Patent Document 1 describes that a point where a large vibration is detected by an acceleration sensor mounted on a vehicle is determined to be a point where road damage such as unevenness has occurred.

[0004] However, the vertical acceleration detectable on the vehicle reflects the road surface conditions only in the areas where the wheels of the vehicle have actually passed, so unevenness in areas where the wheels have not passed cannot be detected as road damage. Also, if there is a manhole or the like on the road surface, the unevenness at the manhole may be erroneously detected as damage, which causes a problem in that the road conditions cannot be grasped with high accuracy. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2023-34486 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a road surface monitoring device that can grasp the road surface conditions with high accuracy. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the road surface monitoring device according to the present invention has the following features. A first data acquisition unit that acquires driving data of a plurality of vehicles; a location selection unit that selects a location where a ratio of the vehicles that have detected road damage is equal to or greater than a predetermined value based on acceleration data of the vehicle and position data of the vehicle included in the travel data; and a second data acquisition unit that acquires the travel data from the vehicles that meet a predetermined condition among the vehicles traveling through the selected point selected by the point selection unit. It is a road surface monitoring device. Effect of the Invention

[0008] According to the present invention, it is possible to provide a road surface monitoring device that can grasp the road surface conditions with high accuracy.

[0009] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the following description of the embodiment of the present invention (hereinafter, referred to as "embodiment") with reference to the accompanying drawings. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a configuration diagram showing an embodiment of a traffic control system including a road surface monitoring device according to the present embodiment. [Diagram 2] FIG. 2 is a flowchart illustrating a processing procedure of the vehicle-mounted device illustrated in FIG. [Diagram 3] FIG. 3 is a flowchart showing a processing procedure of the server shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0012] An example of the configuration of a traffic control system 1 according to one embodiment of the present invention is shown in Fig. 1. The traffic control system 1 shown in Fig. 1 is a traffic control system operated by a service provider whose customers (users) are businesses that manage the operation of vehicles such as trucks and taxis. Road managers who perform maintenance and management of roads are also included in the customers who receive services provided by the traffic control system 1.

[0013] The traffic management system 1 shown in FIG. 1 includes a server 80 that manages vehicle traffic, an in-vehicle device 10 that is mounted on a vehicle such as a truck and used, an office PC 30 that is used by the manager on the business side, and a communication terminal 90 that is used by the road manager. The in-vehicle device 10 has a drive recorder function and a digital tachograph function. In the traffic management system 1, the server 80 collects and accumulates the traffic data collected by the in-vehicle device 10 and the video data (corresponding to the image data in the claims) taken by the in-vehicle camera installed in the vehicle, and provides the analysis results related to traffic management to the office PC 30 or the communication terminal 90 according to the request of the customer. In this embodiment, the traffic management system 1 has the server 80 receive a report request of the road damage point from the communication terminal 90 and transmit a report of the analysis result to the communication terminal 90. The report of the analysis result is a report that links the video data of the road damage point with the position of the vehicle when the video data was acquired and presents it on the map data. The road damage point means a point where damage such as unevenness or cracks occurs on the road surface.

[0014] The office PC 30 is installed in a specified office to manage each vehicle, driver, work content, etc. The server 80 is a facility on the service provider (support center) side that performs analysis based on the driving data collected from the in-vehicle device 10 and provides various services to the customer using the analysis results. The operation management system 1 includes a plurality of office PCs 30 and communication terminals 90 installed in the offices of a plurality of customers, as well as a plurality of in-vehicle devices 10.

[0015] In the vehicle-mounted device 10, driving data including video data and driving data captured by the vehicle-mounted cameras (cameras 23A, 23B) while the vehicle is driving is recorded in a recording medium 65 such as a memory card. The driving data includes, for example, the vehicle's position, speed, engine speed, trigger information such as warnings (vehicle distance warning, inattentive driving warning, etc.), and sharp turns, and is recorded in association with time information indicating the time when the video data was captured. The driving data recorded in the recording medium 65 is read out by the office PC 30, for example, when the vehicle returns to the office after the day's driving is completed. The server 80 accumulates the driving data collected from the vehicle-mounted devices 10 of each vehicle owned by multiple customers in a database 85.

[0016] The office PC 30 is composed of a general-purpose computer device installed in an office. The office PC 30 manages the operation status of vehicles, etc. The communication terminal 90 is installed in the office of a road administrator, etc., requests a report on road damage points from the server 80, receives and displays a report of the analysis results transmitted from the server 80. The server 80 analyzes driving data including video data and event information collected by the vehicle-mounted device 10, and provides information to the office PC 30 and the communication terminal 90. In the example of FIG. 1, data communication between the vehicle-mounted device 10 and the server 80 is performed via a base station 71. Data communication between the vehicle-mounted device 10 and the office PC 30 is relayed by the base station 71, the server 80, and the network 70. Wireless communication between the base station 71 and the vehicle-mounted device 10 may be performed via a mobile communication network (mobile line network) such as LTE (Long Term Evolution) / 5G (5th Generation), or via a wireless LAN (Local Area Network). The network 70 is a network (packet communication network) such as the Internet, and relays data communication between the office PC 30 or the communication terminal 90 and the server 80.

[0017] The vehicle-mounted device 10 is equipped with various interfaces (I / F) 12A, 12B, 13, 14, 16, 19, and 29 to enable input or output of various signals. The speed I / F 12A has a function for inputting a vehicle speed pulse signal outputted from a vehicle speed sensor 51 mounted on the vehicle side. The engine speed I / F 12B has a function for inputting an engine speed pulse signal outputted from the vehicle side. The external input I / F 13 is used for inputting various external signals.

[0018] The sensor input I / F 14 is used to input signals from various sensors. In the example of FIG. 1, an acceleration sensor 28 and a gyro sensor 52 are connected to the sensor input I / F 14. The acceleration sensor 28 detects the magnitude of acceleration in various directions, such as the forward / backward, left / right, and up / down directions of the vehicle, applied to the vehicle on which the vehicle-mounted device 10 is mounted (forward / backward acceleration, right / left acceleration, and up / down acceleration). The gyro sensor 52 detects the rotational angular velocity around each of the pitch axis, yaw axis, and roll axis of the vehicle on which the vehicle-mounted device 10 is mounted, and thereby outputs signals indicating changes in the pitch angle, yaw angle, and roll angle. Based on the outputs of the gyro sensor 52 and the acceleration sensor 28, the control unit 11 detects a sharp turn of the vehicle.

[0019] The analog input I / F 29 is used to input various analog signals. The camera I / F 16 has a function for connecting the cameras 23A and 23B. That is, the camera I / F 16 has a function for taking in the video signals output by the cameras 23A and 23B, respectively, converting them into predetermined digital image data suitable for computer processing, and acquiring video data. The camera 23A is a front camera installed in front of the vehicle, and captures the surroundings of the vehicle. The camera 23A can capture, for example, the front and sides of the vehicle, and capture other vehicles located around the vehicle. The camera 23B is an in-vehicle camera installed in the vehicle cabin, for example, in front of the driver's seat, and captures the scene inside the vehicle including the driver's face. The number of cameras connected to the camera I / F 16 may be three or more.

[0020] The audio I / F 19 has a function of generating a predetermined audio signal that can be used for audio alerts, etc.

[0021] The control unit 11, which realizes the main functions of the vehicle-mounted device 10, is composed of electronic circuits mainly including a microcomputer processor (CPU). This microcomputer realizes the control functions of the vehicle-mounted device 10, which will be described later, by executing programs previously stored in the non-volatile memory 26A or the like.

[0022] The above-mentioned interfaces 12A, 12B, 13, 14, 16, and 29 are connected to the input of the control unit 11. Also, a speaker 20 is connected to the output of the control unit 11 via an audio I / F 19. The speaker 20 outputs an alarm sound such as a vehicle distance alarm.

[0023] In addition, the recording unit 17, the display unit 27, the power supply unit 25, the communication unit 24, the non-volatile memory 26A, the volatile memory 26B, the card I / F 18, the RTC unit 21, and the GPS receiving unit 9 are connected to the control unit 11.

[0024] The recording unit 17 records driving data such as video data output by the cameras 23A and 23B in a predetermined storage area (recording medium 65). The display unit 27 can be used to display visible information such as characters required for operating the vehicle-mounted device 10, and information calling attention to driving operations so that the driver can visually recognize the information. The display unit 27 also displays information related to the occurrence of warnings such as a vehicle distance warning.

[0025] The power supply unit 25 generates stable power supply based on the power supply supplied from the vehicle side, and supplies the generated power supply to each circuit in the vehicle-mounted device 10 including the control unit 11. The communication unit 24 provides a wireless communication function for data communication between the vehicle-mounted device 10 and the base station 71.

[0026] The non-volatile memory 26A is made up of a semiconductor memory, and stores in advance programs executable by the microcomputer of the control unit 11, various constant data required for control, tables, etc. The volatile memory 26B is used to temporarily store data generated by the control unit 11 during processing, etc.

[0027] A recording medium 65 possessed by the driver is removably connected to the card I / F 18. The control unit 11 can read data from the recording medium 65 attached to the card I / F 18, and can also write various data generated by the control unit 11 to the recording medium 65 via the card I / F 18.

[0028] The RTC (real time clock) unit 21 is configured with an integrated circuit having a clock function. That is, the RTC unit 21 can generate information on the current time and grasp the elapsed time.

[0029] The GPS receiver 9 receives radio waves from multiple GPS (Global Positioning System) satellites via an antenna 9a. Based on the multiple received signals received by the GPS receiver 9, position information indicating the current position of the vehicle can be calculated and obtained. In addition, the movement of the vehicle can be detected using the position information based on the signals received by the GPS receiver 9. Furthermore, time information can be obtained based on the signals received by the GPS receiver 9.

[0030] The office PC 30 is a PC that runs on a general-purpose operating system. The office PC 30 can be used as a management device for grasping and managing the driving status and operating status of a vehicle. The office PC 30 has a control unit (CPU) 31, a communication unit 32, a display unit 33, a memory unit 34, a card I / F 35, an operation unit 36, an external I / F 37, and an audio I / F 38.

[0031] The control unit 31 comprehensively controls each unit of the office PC 30. The communication unit 32 can communicate with the server 80 via the network 70. The display unit 33 can display various information that can be used for operation management of each vehicle. The storage unit 34 can acquire and manage data generated by the vehicle-mounted device 10 mounted in each vehicle.

[0032] A recording medium 65 is attached to the card I / F 35 so as to be freely insertable and removable. The card I / F 35 is used to input various data recorded in the vehicle-mounted device 10 from the recording medium 65. The operation unit 36 ​​has a keyboard, a mouse, etc., and accepts operations by the manager of the office PC 30. An external storage device (not shown), such as an operation data database (DB) or a hazard map database (DB), can be connected to the external I / F 37. A microphone 41 and a speaker 42 are connected to the audio I / F 38. The manager can also make audio calls using the microphone 41 and the speaker 42.

[0033] The server 80 has a control unit (CPU) 81, a communication unit 82, a storage unit 83, and an external I / F 84. The communication unit 82 communicates with the vehicle-mounted device 10 via the base station 71. The communication unit 82 can also communicate with the office PC 30 or the communication terminal 90 via the network 70. The storage unit 83 is a memory capable of storing various data. A database (DB) 85 and the like can be connected to the external I / F 84. The DB 85 can store driving data collected from multiple vehicle-mounted devices 10.

[0034] The control unit 81 comprehensively controls each part of the server 80, and functions as an analysis unit that performs image analysis of video data acquired by the vehicle-mounted camera 23A of the vehicle. The control unit 81 analyzes the vehicle's operation data, and accumulates the analysis results, that is, operational data, in the DB 85. An example of analysis of operation data is shown below. The control unit 81 analyzes the type and number of warnings, and when the number of warnings of the same type exceeds a threshold, displays an increase in warnings in a list or in the video data. The control unit 81 calculates a safety score based on the frequency of dangerous behavior, etc., from an analysis report that analyzes the operation data of each driver (crew member), and makes it possible to use the score for driver safety education.

[0035] The communication terminal 90 is a PC that runs on a general-purpose operating system and is used by a person in charge of road maintenance management. The communication terminal 90 has an operation unit having a keyboard, mouse, etc., that accepts operations from the person in charge, a communication unit that communicates with the server 80, a display unit that displays the analysis results sent from the server 80, a storage unit that stores the analysis results, etc., and a control unit that performs overall control of each unit. The communication terminal 90 accepts operation input from the person in charge regarding a request for a report on road damage points, transmits a report request to the server 80, receives a report of the analysis results from the server 80, and plays a map with a mark indicating the road damage point superimposed thereon and video data of the road damage point.

[0036] In the traffic control system 1 configured as above, the operation of the server 80 and the traffic control system 1 with respect to detection of road damage points will be described with reference to Figs.

[0037] First, the operation of the vehicle-mounted device 10 will be described with reference to Fig. 2. When the vehicle-mounted device 10 is attached to a vehicle, vehicle-specific information is set in the vehicle-mounted device 10 (step S10). The specific information is, for example, the size type of the vehicle (extra large, large, medium, normal, etc.) and vehicle weight information. The specific information can be input to the vehicle-mounted device 10 via, for example, an operation unit (not shown), and the input specific information is stored in, for example, the non-volatile memory 26A.

[0038] When the vehicle leaves the garage (step S11), the control unit 11 of the vehicle-mounted device 10 (hereinafter, simply abbreviated as "vehicle-mounted device 10") temporarily stores driving data including operation data and video data (S12). In S12, the vehicle-mounted device 10 captures the vehicle's position, speed, engine RPM, acceleration, rotational angular velocity, and warnings from external devices at regular intervals. The vehicle-mounted device 10 temporarily records the captured vehicle position, speed, engine RPM, warning, and sudden start and sudden braking information obtained from acceleration, and sudden turn information obtained from rotational angular velocity, etc., as operation data. Also, in S12, the vehicle-mounted device 10 temporarily records video data acquired by the camera 23A, which is an in-vehicle camera. The camera 23A is an external camera that can capture images of the vehicle's surroundings and roads in particular, and the video data includes road images. The video data is recorded in association with information on the vehicle's position and the time of capture.

[0039] After a certain period of time has elapsed (Y in S13), the vehicle-mounted device 10 judges whether the vertical acceleration and the lateral acceleration among the accelerations captured during the certain period of time exceed the threshold value Gth (S14). If the vertical acceleration and the lateral acceleration do not exceed the threshold value Gth (N in S14), the acceleration (vibration) actually occurring in the vehicle is not of a significant magnitude, so the vehicle-mounted device 10 discards the temporarily stored video data (S15) and proceeds to S16.

[0040] On the other hand, if the vertical acceleration and the lateral acceleration exceed the threshold value Gth (Y in S14), the vehicle-mounted device 10 detects road damage and proceeds to S16 without discarding the temporarily stored video data.

[0041] In S16, the vehicle-mounted device 10 determines whether or not the vehicle-mounted device 10 employs a communication method based on wireless communication. If the vehicle-mounted device 10 employs a communication method based on wireless communication (Y in step S16), the vehicle-mounted device 10 transmits the temporarily stored driving data to the server 80 (S17). When the transmission is completed (Y in step S18), the vehicle-mounted device 10 discards the temporarily stored driving data (step S19) and resumes the processing from step S12 onward.

[0042] On the other hand, if the wireless communication method is not adopted in step S16 (N in step S16), the vehicle-mounted device 10 saves the temporarily stored driving data in the recording medium 65 (step S20). When the saving is completed (Y in step S21), the vehicle-mounted device 10 discards the temporarily stored driving data (step S19) and resumes the processing from step S12 onwards. After the vehicle is brought into the warehouse, the vehicle-mounted device 10 ends the processing in Fig. 2. If the data is saved in the recording medium 65, the data can be read out from the recording medium 65 by the office PC 30 and utilized.

[0043] Through the above operations, the vehicle-mounted device 10 transmits driving data to the server 80 at regular intervals and records it in the recording medium 65. If the vehicle-mounted device 10 detects road damage during the regular interval, it transmits video data of the time when the vehicle passes the point where the road damage was detected to the server 80 and records it in the recording medium 65. The video data is linked to the vehicle's position (i.e., the point where the road damage was detected) and the time of shooting.

[0044] Next, an operation performed by the server 80 will be described. The server 80 functions as a first data acquisition unit, and upon receiving driving data from the vehicle-mounted device 10 or the office PC 30, stores the received driving data in a database 85. The server 80 also periodically (for example, once a month) performs the process shown in FIG.

[0045] First, the server 30 functions as a point selection unit and selects points (S22). In S22, the server 30 extracts the positions of the vehicles linked to the video data acquired while traveling during a first period (e.g., from one month ago to today) stored in the database 85 as points where road surface damage was detected. In addition, for each extracted point, the server 30 obtains the number of vehicles A that detected road surface damage among the vehicles that passed through the point, and the number of vehicles B that did not detect road surface damage. Next, the server 30 selects from each extracted point a point where the proportion A / (A+B) of vehicles that detected road surface damage is equal to or greater than a predetermined value.

[0046] Thereafter, the server 30 simultaneously transmits the selection point selected in S22 and the predetermined conditions to the vehicle-mounted devices 10 mounted on the multiple vehicles (S23). The predetermined conditions are, for example, the driving time period, the vehicle size type (vehicle size), the vehicle weight, the vehicle speed, and the weather at the time of collecting the driving data including the video data. The vehicle-mounted device 10 transmits to the server 80 the video data captured when passing, for example, 5 m in front of and behind the selection point and the output of the acceleration sensor 28 in a state that matches the predetermined conditions.

[0047] The predetermined conditions are, for example, conditions that allow the road surface condition to be clearly captured. By setting the driving time period to, for example, daytime and the weather to be fine, the camera 23A mounted on the vehicle-mounted device 10 can capture the road surface condition clearly. The predetermined conditions are also conditions that cause the vehicle to shake more when driving through a point where road surface damage has occurred. In general, the larger and heavier the vehicle is, the more the vehicle shakes when driving on a road surface with defects or unevenness. Furthermore, unless the vehicle speed is relatively high, the shaking does not become large even when driving on a road surface with defects or unevenness. Therefore, the output of the acceleration sensor 28 can be increased by setting the size-specific type of the vehicle indicating the size of the vehicle to, for example, extra large or more, the weight of the vehicle to a predetermined weight or more, and the vehicle speed to a predetermined speed or more.

[0048] When the server 30 receives the video data and the output of the acceleration sensor 28 acquired under predetermined conditions from the vehicle-mounted device 10, it functions as a second data acquisition unit and stores the latest video data and the output of the acceleration sensor 28 at the selected point (= the vehicle's position linked to the video data) in the database 85 (S24). When the second period (e.g., from today until one month from now) has elapsed (Y in S25), the server 30 determines whether or not it has received the video data and the output of the acceleration sensor 28 at all selected points (S26). When the server 30 has received the video data and the output of the acceleration sensor 28 at all selected points (Y in S26), the server 80 immediately proceeds to S28.

[0049] On the other hand, if the video data and the output of the acceleration sensor 28 cannot be received at all of the selected points (N in S26), the server 80 selects from the video data and the output of the acceleration sensor 28 acquired during driving in the first period that match the predetermined conditions, stores them in the database 85 as the latest video data and the output of the acceleration sensor 28 at the selected points that could not be received (S27), and then proceeds to S28. At the point in time when the server 80 proceeds to S28, the latest video data and the output of the acceleration sensor 28 acquired under the predetermined conditions at all of the selected points selected in S22 can be stored in the database 85.

[0050] Next, the server 80 functions as a judgment unit, and analyzes the latest video data and the output of the acceleration sensor 28 for all selected points to perform a judgment process to determine whether or not road surface damage has occurred, and after storing the judgment result in the database 85 (S28), the processing is terminated.

[0051] The judgment process is performed, for example, by inputting the video data and the output of the acceleration sensor 28 into a machine-learned model that uses the video data and the output of the acceleration sensor 28 as input and the judgment result and the type of road damage (bumps, cracks, etc.) as output.

[0052] When the road administrator uses the communication terminal 90 to send a report request for road damage points to the server 80, the server 80 functions as a providing unit and sends the selected points determined to have road surface damage in the determination process of S28 to the communication terminal 90 as road damage points. A mark indicating the road damage point of S28 is displayed on a map on the communication terminal 90. When the road administrator touches the mark displayed on the map, video data captured at the road damage point is played. The road administrator can judge whether road surface damage has actually occurred by viewing the played video data.

[0053] In response to a request for a report of a road damage location, the server 80 may provide a history of video data of the road damage location, so that the progress rate of the road damage and other conditions can be understood.

[0054] According to the embodiment described above, the server 80 selects a point where the ratio of vehicles that have detected road surface damage is equal to or greater than a predetermined value. This allows the server 80 to accurately select a point where road surface damage has been detected. Furthermore, the server 80 acquires video data and output of the acceleration sensor 28 from vehicles that meet predetermined conditions among the vehicles traveling through the selected point. This allows the server 80 to acquire video data and output of the acceleration sensor 28 for accurately determining road damage, and to grasp the road surface conditions.

[0055] According to the above-described embodiment, the predetermined conditions are a predetermined driving time period, a vehicle size, a vehicle speed, and weather. Therefore, video data can be acquired when the vehicle travels through the selected point under conditions that allow a clear image of the road surface. In addition, the acceleration of a vehicle that experiences a large amount of shaking when traveling on a road surface with defects or unevenness can be acquired when the vehicle travels through the selected point.

[0056] According to the embodiment described above, in S24, the driving data (video data and output of acceleration sensor 28) from the vehicle that traveled during a second period after the travel date (first period) of the driving data (output of acceleration sensor 28) used in the location selection in S22 is acquired and stored in database 85. This makes it possible to acquire the latest driving data.

[0057] According to the embodiment described above, in S28, the road surface condition at the selected point is determined based on the video data acquired in S24 and the output of the acceleration sensor 28. This makes it possible to provide the road administrator with more accurate information on road surface damage points.

[0058] According to the above embodiment, the video data acquired at the point determined to be a road damage point in S28 and the output of the acceleration sensor 28 are provided to the communication terminal 90. This makes it possible to provide the road surface damage point with high accuracy to the road administrator.

[0059] The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

[0060] According to the embodiment described above, the server 80 selects a location based on the output of the acceleration sensor 28 when the vehicle traveled during a first period, and acquires video data and the output of the acceleration sensor 28 at the selected location when the vehicle traveled during a second period after the first period, but this is not limited to this. The server 80 may acquire video data and the output of the acceleration sensor 28 from a vehicle that meets a predetermined condition among the vehicles that traveled through the selected location during the first period.

[0061] According to the above-described embodiment, the server 80 is not required to perform S26 and S27, and may acquire video data and the acceleration sensor 28 only from vehicles that have traveled through the selected point during the second period. In this case, the vehicle-mounted device 10 does not need to send video data when it detects road surface damage based on the output of the acceleration sensor 28, and it is sufficient to transmit to the server 80 or record in the recording medium 65 only the position where the road surface damage was detected.

[0062] According to the embodiment described above, the vehicle-mounted device 10 detects road damage based on the output of the acceleration sensor 28, but the present invention is not limited to this. The server 80 that acquires the output of the acceleration sensor 28 may detect road damage based on the output of the acceleration sensor 28.

[0063] According to the embodiment described above, the server 80 determines in S28 whether or not further road surface damage has occurred at the selected point based on the video data and the output of the acceleration sensor 28, but this is not limited to the above. The determination process in S28 is not essential. The server 80 may provide the communication terminal 90 with the video data and the output of the acceleration sensor 28 for all the selected points selected in S23.

[0064] According to the embodiment described above, the server 80 performs the determination process by inputting the video data and the output of the acceleration sensor 28 into a machine-learned model, but the present invention is not limited to this. It is also possible to perform the determination by inputting only the video data into the model.

[0065] According to the above-described embodiment, the report of the road damage location is provided to the road manager and used for road maintenance and conservation, but the present invention is not limited to this. The report of the road damage location may be used for purposes other than maintenance and conservation.

[0066] According to the embodiment described above, the server 80 determines whether or not road damage has occurred at the selected point based on video data, but this is not limited to the above. The server 80 may also make the above determination based on still image data (image data) extracted from the video data.

[0067] According to the above-described embodiment, the vehicle-mounted device 10 collects video data and transmits it to the server 80, but the present invention is not limited to this. The vehicle-mounted device 10 may collect still image data that is intermittently captured and transmit it to the server 80. The server 80 determines whether or not road damage has occurred at the selected point based on the collected still image data.

[0068] According to the embodiment described above, the server 80 performs both the analysis of operation data for businesses and the detection of road damage points for road managers shown in Fig. 3, but this is not limited to this. A server that analyzes operation data for businesses and a server that detects road damage points for road managers shown in Fig. 3 may be provided separately.

[0069] According to the above-described embodiment, the size type is set in the vehicle-mounted device 10 as unique information indicating the size of the vehicle, and the size type is, for example, extra large or larger as a predetermined condition, but this is not limited to this. The overall length and overall width of the vehicle may be set in the vehicle-mounted device 10 as unique information indicating the size of the vehicle, and the overall length may be a predetermined length or more, and the overall width may be a predetermined width or more as a predetermined condition.

[0070] Here, the features of the above-mentioned embodiments of the road surface monitoring device according to the present invention will be briefly summarized and listed in the following [1] to [6]. [1] A first data acquisition unit (81) that acquires driving data of a plurality of vehicles; a location selection unit (81) that selects a location where a ratio of the vehicles that have detected road damage is equal to or greater than a predetermined value based on acceleration data of the vehicle and position data of the vehicle included in the travel data; and a second data acquisition unit (81) that acquires the travel data from the vehicles that meet a predetermined condition among the vehicles traveling through the selected point selected by the point selection unit (81), Road monitoring device (80).

[0071] According to the configuration of [1] above, the road surface monitoring device (80) selects a point where the ratio of vehicles that have detected road surface damage is equal to or greater than a predetermined value. This makes it possible to select the point where road surface damage has been detected with high accuracy. Furthermore, the server (80) acquires driving data from vehicles that meet predetermined conditions among the vehicles that are traveling through the selected point. This makes it possible to acquire driving data for determining road damage with high accuracy, and to grasp the road surface conditions.

[0072] [2] In the road surface monitoring device (80) according to [1], The predetermined condition is at least one of a predetermined travel time period, a size of the vehicle, a weight of the vehicle, a speed of the vehicle, and weather. Road monitoring device (80).

[0073] According to the above configuration [2], image data can be acquired when a vehicle travels through a selected point under conditions that allow a clear image of the road surface. In addition, the acceleration of a vehicle that experiences large vibrations when traveling on a road with defects or unevenness can be acquired when the vehicle travels through a selected point.

[0074] [3] In the road surface monitoring device (80) according to [1], The second data acquisition unit (81) acquires the travel data from the vehicle that traveled after a travel date of the travel data used by the location selection unit (81). Road monitoring device (80).

[0075] According to the above configuration [3], the latest driving data can be obtained.

[0076] [4] In the road surface monitoring device (80) according to [1], and a determination unit (81) that determines whether or not road damage has occurred at the selected point based on the image data included in the traveling data acquired by the second data acquisition unit (81). Road monitoring device (80).

[0077] According to the above configuration [4], it is possible to provide road managers with road surface damage locations with even greater accuracy.

[0078] [5] In the road surface monitoring device (80) according to [4], A provision unit (81) that provides the travel data acquired by the second data acquisition unit for the selected point determined to be the road damage by the determination unit (81), Road monitoring device (80).

[0079] According to the configuration [5] above, road surface damage locations can be provided to road managers with high accuracy.

[0080] [6] In the road surface monitoring device (80) according to [5], The providing unit (81) provides a history of the traveling data. Road monitoring device (80).

[0081] According to the configuration described above in [6], it is possible to grasp the situation, such as the rate at which road damage is progressing. [Explanation of symbols]

[0082] 80 Servers 81 control unit (first data acquisition unit, location selection unit, second data acquisition unit, determination unit, provision unit)

Claims

1. A first data acquisition unit that acquires driving data of a plurality of vehicles; a location selection unit that selects a location where a ratio of the vehicles that have detected road damage is equal to or greater than a predetermined value based on acceleration data of the vehicle and position data of the vehicle included in the travel data; and a second data acquisition unit that acquires the travel data from the vehicles that travel through the selected point selected by the point selection unit and that meet a predetermined condition. Road monitoring device.

2. 2. The road surface monitoring device according to claim 1, The predetermined condition is at least one of a predetermined travel time period, a size of the vehicle, a weight of the vehicle, a speed of the vehicle, and weather. Road monitoring device.

3. 2. The road surface monitoring device according to claim 1, The second data acquisition unit acquires the travel data from the vehicle that traveled on a date later than the travel date of the travel data used by the location selection unit. Road monitoring device.

4. 2. The road surface monitoring device according to claim 1, A determination unit that determines whether or not road damage has occurred at the selected point based on the image data included in the traveling data acquired by the second data acquisition unit. Road monitoring device.

5. The road surface monitoring device according to claim 4, a providing unit that provides the travel data acquired by the second data acquisition unit for the selected point determined to be the road damage by the determining unit, Road monitoring device.

6. The road surface monitoring device according to claim 5, The providing unit provides a history of the traveling data. Road monitoring device.

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