JP2021189470A - Road surface abnormality registration device and computer program - Google Patents

Abstract

To provide a road surface abnormality registration device and computer program capable of speedily providing information of a road surface abnormality.SOLUTION: A server device 3 of a road surface abnormality registration system 1 registers a road surface abnormality point 65 where a road surface abnormality is newly detected (S4, S5), and sets a degree of reliability with respect to occurrence of a road surface abnormality at the road surface abnormality point 65 (S4). The server device 3 updates a degree of reliability based on a detection value of an on-vehicle sensor 7 when a vehicle 5 traveling on a road travels the road surface abnormality point 65 (S7, S8, S13, S16). The server device 3 cancels registration of a road surface abnormality point concerning the road surface abnormality point 65 where a degree of reliability comes to be equal to or less than a predetermined value (S15).SELECTED DRAWING: Figure 6

Description

The present invention relates to a road surface abnormality registration device and a computer program for registering a road surface abnormality.

Conventionally, information on road surface abnormalities has been collected. For example, the road surface condition detecting device disclosed in Japanese Patent Application Laid-Open No. 2015-229433 collects information on road surface abnormalities from a vehicle traveling on a road. Each vehicle traveling on the road estimates the road surface condition from the amount of change in the detected value of the acceleration sensor attached to the vehicle. When it is estimated that cracks or irregularities are present on the road surface based on the detected values, each vehicle transmits data related to the cracks or the like to the cloud server as road surface condition estimation information (paragraphs 0027, 0033). When a crack or unevenness on the road surface is detected from a plurality of vehicles at the same position, the cloud server determines that the crack or unevenness exists at that position (paragraph 0036).

JP-A-2015-229433 (Fig. 7)

In the technique disclosed in Patent Document 1 described above, it is not determined that a road surface abnormality such as a crack in the road surface has occurred unless a certain number of detections is satisfied in consideration of falling objects on the road. Therefore, for example, on a road or area where there are few vehicles passing through, the number of detections does not increase, and it takes time until it is determined that a road surface abnormality has occurred. As a result, the confirmation of the registration of the road surface abnormality and the notification of the road surface abnormality may be delayed, resulting in lack of real-time performance.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a road surface abnormality registration device and a computer program capable of speedily providing information on road surface abnormalities.

In order to achieve the above object, the road surface abnormality registration device according to the present invention determines a registration means for registering a newly detected road surface abnormality point as a road surface abnormality point and a probability that the road surface abnormality has occurred at the road surface abnormality point. The value setting means for setting the indicated value and the value setting means for detecting the road surface abnormality by the sensor provided by the vehicle when the vehicle traveling on the road travels on the road surface abnormality point. It is provided with an updating means for updating the value indicating the probability, and a canceling means for canceling the registration of the road surface abnormal point with respect to the road surface abnormal point whose value indicating the probability is equal to or less than a predetermined value.

Further, the computer program according to the present invention is a computer program for registering a road surface abnormality point, which is a registration means for registering a point where a new road surface abnormality is detected as the road surface abnormality point and a road surface abnormality point. A value setting means for setting a value indicating the probability that the road surface abnormality has occurred, and a detection value for detecting the road surface abnormality by a sensor provided in the vehicle when the vehicle traveling on the road travels on the road surface abnormality point. Based on the above, the update means for updating the value indicating the probability set by the value setting means and the cancellation of the registration of the road surface abnormality point for the road surface abnormality point where the value indicating the probability is equal to or less than a predetermined value. Make it work as a means.

According to the road surface abnormality registration device and the computer program according to the present invention having the above configuration, a road surface abnormality point where a new road surface abnormality is detected is registered, and a value indicating the probability that a road surface abnormality has occurred at the road surface abnormality point. Set the initial value. Then, the road surface abnormality registration device updates the value indicating the probability based on the detection value of the sensor of the vehicle traveling on the road. As a result, the information on the road surface abnormality can be provided speedily by registering the road surface abnormality point and setting the value indicating the probability at an early stage of the newly detected timing. In addition, if pebbles, dust, fruits of roadside trees, etc. have fallen on the road surface, there is a risk that road surface abnormalities will be erroneously detected. Therefore, the registration of the abnormal road surface point is canceled for the abnormal road surface point whose value indicating the probability is equal to or less than the predetermined value. Therefore, by updating the value indicating the probability while excluding the registration of the road surface abnormality point due to the erroneous detection based on the detection value of the sensor, it is possible to provide the information on the road surface abnormality while improving the accuracy of the value indicating the probability.

The "value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point" is, for example, a value indicating the probability itself that the road surface abnormality has occurred at the road surface abnormality point, a value that fluctuates according to the probability, and a road surface. It is a value indicating the reliability of the provided information when the information indicating that the road surface abnormality has occurred at the abnormal point is provided. "Road surface abnormality" is a concept that includes not only abnormalities of the road surface itself such as potholes and cracks of the road surface, but also abnormalities that occur between the road surface and other objects such as freezing of the road surface. Therefore, the road surface abnormality includes various road surface abnormalities that affect the traveling of the vehicle. Further, the "detection value" is not limited to the value of the sensor signal detected by the sensor itself, but includes a value calculated and estimated from the value of the sensor signal. Further, "cancelling the registration of the abnormal road surface point" is not limited to deleting the information from the database for registering the abnormal road surface point. For example, although it is registered in the database as information on the road surface abnormality point, when the database is accessed, a process of handling so as not to respond as valid information may be executed as a process of canceling the registration.

It is a schematic block diagram which showed the road surface abnormality registration system which concerns on embodiment. It is a block diagram which showed the structure of the road surface abnormality registration system which concerns on embodiment. It is a block diagram which shows typically the control system of the navigation device which concerns on embodiment. It is a figure which shows the contents of the management DB stored in the probe information DB. It is a flowchart of a road surface abnormality point processing program. It is a flowchart of a road surface abnormality point processing program. It is a figure which shows the screen which displayed the road surface abnormality point.

Hereinafter, the road surface abnormality registration system according to the present invention will be described in detail with reference to the drawings based on an embodiment embodied. First, the schematic configuration of the road surface abnormality registration system 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic configuration diagram showing a road surface abnormality registration system 1 according to the present embodiment. FIG. 2 is a block diagram showing the configuration of the road surface abnormality registration system 1 according to the present embodiment.

As shown in FIG. 1, the road surface abnormality registration system 1 according to the present embodiment includes a server device (an example of a road surface abnormality registration device) 3 included in the probe center 2 and a personal computer (hereinafter referred to as a PC) operated by a user. A navigation device 6 which is a communication (guidance) terminal mounted on each of a plurality of vehicles 5 and an in-vehicle sensor 7 (an example of a sensor) mounted on the vehicle 5 are basically provided. Further, the server device 3, the PC 4, and the navigation device 6 are configured to be able to send and receive electronic data to and from each other via the communication network 8. Instead of the navigation device 6, for example, a mobile phone, a smartphone, a tablet terminal, or a personal computer may be used.

Here, the road surface abnormality registration system 1 according to the present embodiment constitutes a so-called probe car system. The probe car system is a system that collects information using the vehicle 5 as a sensor. Specifically, for example, the operation status of each system such as speed data, steering operation, shift position, etc., including the information of the detected value detected by the in-vehicle sensor 7 of the vehicle 5, is mounted on the vehicle 5 in advance together with the GPS position information. A system that transmits data to the probe center 2 via a communication device and reuses the collected data as various information on the center side.

The server device 3 included in the probe center 2 appropriately collects and accumulates probe information (material information) including information on road surface abnormalities from vehicles 5 traveling nationwide, and various types of roads are collected from the accumulated probe information. It is an information management server that registers support information. In particular, in the present embodiment, the server device 3 has, for example, the reliability of the road surface abnormality point where the road surface abnormality has occurred (probability of the present application) based on the detection value collected from the in-vehicle sensor 7 of the vehicle 5 traveling on the road. An example of the value indicating () is updated. When the information on the road surface abnormality point or the reliability information is accessed from an external terminal, the corresponding information is responded. The external terminal referred to here is, for example, a PC 4 operated by a road administrator who manages road repair. In addition to road managers who manage road repairs, users who operate PC4 are, for example, ministries and organizations that manage general roads and expressways such as the Ministry of Land, Infrastructure, Transport and Tourism, Regional Development Bureau, and NEXCO (registered trademark). , Private companies, etc. may be used. For example, the road administrator operates the PC 4 to access the information on the road surface abnormality of the server device 3, and dispatches the repair company to the road surface abnormality point based on the reliability information. Further, the external terminal for accessing the information of the server device 3 is not limited to the PC 4, but may be a smartphone, a tablet terminal, a navigation device 6, or the like. For example, a road repair company may access the information of the server device 3 using a smartphone or a tablet terminal, and determine a point for repairing the road based on the information on the road surface abnormality point and the reliability. ..

The "reliability of the road surface abnormality point" is, for example, a value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point, and is a value that fluctuates according to the probability. Further, the device for updating the reliability may be a device other than the server device 3, for example, a navigation device 6 of the vehicle 5. When the reliability is updated by the navigation device 6, for example, the navigation device 6 acquires the reliability information of the road surface abnormality point from the server device 3 and registers the updated reliability information in the database of the server device 3. May be.

Further, the PC 4 is an auxiliary consisting of a control unit composed mainly of a CPU, ROM, RAM, etc., an input unit composed of a keyboard, a pointing device, etc., an output unit such as a display or a speaker, and a non-volatile storage means such as a hard disk. It is equipped with a storage unit and the like. Further, the PC4 is equipped with Windows (registered trademark), Linux (registered trademark), MacOS (registered trademark) and the like as an OS (Operating System). The OS provides basic functions commonly used by applications, such as input / output functions such as keyboard input and screen output, and access functions to the memory that is the main storage unit and the hard disk that is the auxiliary storage unit. Since the various functions provided by each of these OSs are known, detailed description thereof will be omitted here.

Further, the PC 4 is connected to the communication network 8 via a communication device 9 (see FIG. 2) such as a modem, and is configured to be capable of bidirectional communication with the server device 3. Then, the PC 4 displays various information on the display based on the data acquired from the server device 3. In particular, the PC 4 according to the present embodiment acquires the information on the road surface abnormality point and the reliability information from the server device 3 and displays them on the display (see FIG. 7).

On the other hand, the navigation device 6 is mounted on the vehicle 5, displays a map around the position of the own vehicle based on the stored map data, displays the current position of the vehicle 5 on the map image, and sets a guide route. It is an in-vehicle device that provides movement guidance along the line. The navigation device 6 also transmits information on the detected value detected by the vehicle-mounted sensor 7 mounted on the vehicle 5 to the server device 3. The type of the in-vehicle sensor 7 is not particularly limited, and various sensors that can be mounted on the vehicle 5 can be adopted. Specifically, as the in-vehicle sensor 7, a vehicle speed sensor, a steering sensor, a vertical acceleration sensor, an infrared sensor, an in-vehicle camera, or the like can be adopted. Further, the number of the vehicle-mounted sensors 7 included in the vehicle 5 may be one or a plurality.

In addition, the communication network 8 includes a large number of base stations located all over the country and a communication company that manages and controls each base station, and the base stations and the communication companies are connected to each other by wire (optical fiber, ISDN, etc.) or wirelessly. It is configured by connecting. Here, the base station has a transceiver (transmitter / receiver) and an antenna for communicating with the navigation device 6. Then, while the base station performs wireless communication between communication companies, it becomes the terminal of the communication network network 8 and relays the communication of the navigation device 6 within the range (cell) of the radio wave of the base station to the server device 3. Has a role to play. Further, the communication network network 8 has, for example, a wide area communication network such as the Internet or a LAN (local area network), and has a role of relaying the communication of the PC 4 to the server device 3.

Subsequently, the configuration of the server device 3 constituting the road surface abnormality registration system 1 will be described in more detail with reference to FIG. As shown in FIG. 2, the server device 3 is basically composed of a server control unit 11, a probe information DB (database) 12 connected to the server control unit 11, a server-side map information DB 13, and a center communication device 15. Has been done.

The server control unit 11 is an electronic control unit that controls the entire server device 3, a CPU 21 as an arithmetic unit and a control device, a RAM 22 used as a working memory when the CPU 21 performs various arithmetic processes, and a control unit. In addition to the above-mentioned programs, the ROM 23 in which various programs (see FIGS. 5 and 6) described later are recorded, and an internal storage device such as a flash memory 24 for storing the programs read from the ROM 23 are provided.

The server control unit 11 constitutes various means as a processing algorithm. For example, the registration means registers a newly detected point of road surface abnormality as a road surface abnormality point. The value setting means sets a value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point. The updating means updates a value indicating a probability set by the value setting means based on the detection value detected by the vehicle-mounted sensor 7 included in the vehicle 5 when the vehicle 5 traveling on the road travels on the road surface abnormality point. .. The canceling means cancels the registration of the abnormal road surface point for the abnormal road surface point whose value indicating the probability is equal to or less than a predetermined value.

Further, the probe information DB 12 is a storage means for cumulatively storing probe information collected from vehicles 5 traveling nationwide. The probe information DB 12 of the present embodiment stores a management DB 14 that stores information related to a road surface abnormality point where a road surface abnormality is detected. For example, as shown in FIG. 4, the management DB 14 has, for example, (a) NO of the road surface abnormality point where the road surface abnormality is detected, (b) the detection date and time, (c) the longitude of the road surface abnormality point, and (d) the road surface abnormality. The latitude of the point, (e) the detected value of the vehicle-mounted sensor, (f) the vehicle ID for identifying the vehicle 5, (g) reliability, and (h) the number of trips are stored. The details of the management DB 14 will be described later.

Further, the server-side map information DB 13 is, for example, map information registered based on input data from the outside or an input operation of the server device 3. The server-side map information DB 13 includes link data related to roads (links), node data related to node points, facility data related to facilities, search data used for processing related to route search, map display data for displaying a map, and each intersection. It is a storage means that stores intersection data related to, search data for searching a point, and the like.

Further, the center communication device 15 is a communication device for communicating with an external traffic information center such as a vehicle 5 or a VICS (registered trademark: Vertical Information and Communication System) center via a communication network 8. In the present embodiment, probe information, road surface abnormality point information, and the like are transmitted to and received from the vehicle 5 and the management DB 14 via the center communication device 15.

Next, a schematic configuration of the navigation device 6 mounted on the vehicle 5 will be described with reference to FIG. FIG. 3 is a block diagram showing the navigation device 6 according to the present embodiment. As shown in FIG. 3, the navigation device 6 according to the present embodiment includes a current position detection unit 31 that detects the current position of the vehicle 5 on which the navigation device 6 is mounted, and a data recording unit 32 in which various data are recorded. , A navigation ECU 33 that performs various arithmetic processes based on the input information, an operation unit 34 that accepts operations from the user, and a liquid crystal display 35 that displays a map around the vehicle, information on the road surface condition, and the like to the user. A speaker 36 that outputs voice guidance regarding route guidance, a DVD drive 37 that reads a DVD as a storage medium, and a communication module 38 that communicates between an information center such as a probe center 2 and a VICS center. Is configured. Further, the navigation device 6 is connected to an in-vehicle sensor 7 attached to the vehicle 5 via an in-vehicle network such as CAN.

Hereinafter, each component constituting the navigation device 6 will be described in order.
The current position detection unit 31 is provided with GPS 41 and the like, and can detect the current position, direction, and the like of the vehicle 5. The current position detection unit 31 may include a sensor other than the GPS 41, for example, a vehicle speed sensor, a steering sensor, or the like, or may acquire and use the detection signal of the vehicle-mounted sensor 7. The current position detection unit 31 may use a plurality of sensors to improve the accuracy of detecting the current position of the vehicle 5.

Further, the data recording unit 32 reads out the external storage device, the hard disk as a recording medium (not shown), the map information DB 45, the travel history DB 46, the distribution information DB 47, a predetermined program, etc. recorded on the hard disk, and puts them on the hard disk. It is equipped with a recording head (not shown) that is a driver for writing predetermined data. The data recording unit 32 may be configured by a flash memory, a memory card, an optical disk such as a CD or a DVD, instead of the hard disk. Further, the map information DB 45, the travel history DB 46, and the distribution information DB 47 may be stored in an external server, and the navigation device 6 may acquire necessary information from the external server by communication.

Here, the map information DB 45 is a storage means in which map information is divided and stored for each area (for example, for each mesh of 20 km square). Further, the map information DB 45 is composed of various information necessary for route search, route guidance, and map display, including a road network. For example, it includes position data of coordinate positions of each point, link data related to roads (links), node data related to node points at both ends of the link, intersection data related to each intersection, point data related to points such as facilities, and the like.

Further, the travel history DB 46 is a storage means for accumulating and storing the travel information of the vehicle 5 and the information of the detected value detected by the in-vehicle sensor 7. The travel information stored in the travel history DB 46, the information of the detection value of the vehicle-mounted sensor 7, and the like are appropriately transmitted to the server device 3 as probe information. Further, the distribution information DB 47 is a storage means for storing probe information (information on a road surface abnormality point detected by another vehicle, etc.) distributed from the server device 3.

On the other hand, the navigation ECU (electronic control unit) 33 is an electronic control unit that controls the entire navigation device 6, the CPU 51 as a calculation device and a control device, and a working memory for the CPU 51 to perform various calculation processes. An internal storage device such as a RAM 52 that stores route data and the like when a route is searched, a ROM 53 that records a control program and the like, and a flash memory 54 that stores a program read from the ROM 53. I have.

The operation unit 34 is operated when inputting a departure point as a travel start point and a destination as a travel end point, and is composed of a plurality of operation switches (not shown) such as various keys and buttons. Then, the navigation ECU 33 controls to execute the corresponding various operations based on the switch signal output by pressing each switch or the like. The operation unit 34 can also be configured by a touch panel provided on the front surface of the liquid crystal display 35. It can also be configured by a microphone and a voice recognition device.

In addition, the liquid crystal display 35 has a map image including roads, traffic information, operation guidance, operation menus, key guidance, guidance information along the guidance route (scheduled travel route), news, weather forecast, time, mail, and television. Programs etc. are displayed. A HUD or HMD may be used instead of the liquid crystal display 35. Further, the speaker 36 outputs voice guidance for guiding the travel along the guidance route (scheduled travel route) and traffic information guidance based on the instruction from the navigation ECU 33.

Further, the DVD drive 37 is a drive capable of reading data recorded on a recording medium such as a DVD or a CD. Then, based on the read data, music and video are played back, the map information DB 45 is updated, and the like. A card slot for reading / writing a memory card may be provided instead of the DVD drive 37.

Further, the communication module 38 is a communication device for receiving traffic information, weather information, etc. transmitted from a traffic information center, for example, a VICS center or another external center, and corresponds to, for example, a mobile phone or a DCM. It also includes a vehicle-to-vehicle communication device that communicates between vehicles and a road-to-vehicle communication device that communicates with a roadside unit. It is also used to send and receive probe information and distribution information to and from the server device 3.

Subsequently, a road surface abnormality point processing program executed by the server device 3 included in the road surface abnormality registration system 1 having the above configuration will be described with reference to FIGS. 5 and 6. 5 and 6 are flowcharts of the road surface abnormality point processing program according to the present embodiment. Here, the road surface abnormality point processing program is executed, for example, when the power of the server device 3 is turned on. The road surface abnormality point processing program determines the presence or absence of a road surface abnormality, registers the road surface abnormality point, grants reliability, updates the reliability, and registers the road surface abnormality point based on the information acquired from the navigation device 6 of the vehicle 5. It is a program that executes cancellation. The programs shown in the flowcharts of FIGS. 5 and 6 below are stored in, for example, the ROM 23 included in the server device 3 and executed by the CPU 21 of the server control unit 11.

First, in step 1 (hereinafter abbreviated as S) 1, the server control unit 11 of the server device 3 causes a road surface abnormality to occur at an arbitrary point on the road on which the vehicle 5 travels, based on the information acquired from the navigation device 6. Determine if it was detected.

Here, as described above, the server device 3 of the present embodiment detects a road surface abnormality based on the detection value of the vehicle-mounted sensor 7. The type of road surface abnormality detected based on the detection value of the vehicle-mounted sensor 7 is not particularly limited, but for example, a pothole can be adopted. The pothole is, for example, unevenness formed on the road surface, a hole in the road, peeling of asphalt, or the like. As the vehicle-mounted sensor 7 for detecting the pothole, for example, a vehicle speed sensor can be adopted. As shown in FIG. 3, the navigation device 6 of the vehicle 5 is connected to the vehicle-mounted sensor 7 and inputs a detection signal from the vehicle-mounted sensor 7. The vehicle speed sensor (vehicle-mounted sensor 7) generates a pulse according to the rotation of the drive wheel of the vehicle, and outputs the pulse signal to the navigation ECU 33, for example.

For example, the navigation ECU 33 appropriately transmits the value of the pulse signal of the vehicle speed sensor detected while the vehicle 5 is traveling on the road to the server device 3. The server control unit 11 of the server device 3 has, for example, the values of the pulse signals of the vehicle speed sensor acquired from one vehicle 5 during the day, that is, the driving data for one day, with reference to FIGS. 5 and 6. Executes the road surface abnormality point processing shown in. The server control unit 11 executes the processing after S1 for each arbitrary point from the traveling data for one day. Further, the server control unit 11 similarly executes the processing after S1 for each arbitrary point on the traveling data for one day acquired from each vehicle 5.

For example, the server control unit 11 calculates the wheel speed (rotational speed) and the moving distance of the drive wheels by counting the pulse of the pulse signal of the vehicle speed sensor received from the vehicle 5. The server control unit 11 detects the occurrence of potholes, that is, the occurrence of road surface abnormalities, based on, for example, fluctuations in wheel speed. For example, the server control unit 11 calculates the magnitude of a specific frequency from the output of the vehicle speed sensor as the degree of vibration, estimates the height of the unevenness of the road surface by fuzzy inference based on the parameters of the calculation result, and estimates the height of the unevenness. The occurrence of a pothole is determined by comparing the threshold value with the threshold value. For example, when the estimated height of the unevenness of the road surface is equal to or higher than the threshold value, the server control unit 11 detects the occurrence of a pothole (abnormal road surface).

Then, the server control unit 11 determines in S1 whether or not the occurrence of a pothole (road surface abnormality) is detected from the detection value of the vehicle speed sensor at each arbitrary point. This arbitrary point is, for example, a point set at predetermined distances (several meters, tens of meters, hundreds of meters, etc.) along the road on which the vehicle 5 travels. For example, the navigation device 6 of the vehicle 5 transmits the detection value of the vehicle speed sensor every several meters while traveling to the server device 3. The navigation device 6 may transmit all the detected values of the moving vehicle speed sensor to the server device 3. In this case, the server control unit 11 of the server device 3 may extract a detection value every several meters from the received detection value and detect the occurrence of a road surface abnormality from the extracted detection value.

The arbitrary point of S1 is not limited to the above-mentioned point for each predetermined distance. For example, the arbitrary point may be a point on a specific road such as an arterial road or a national road. For example, the server control unit 11 may acquire the detection value of the vehicle-mounted sensor 7 from the vehicle 5 traveling on a specific road and determine the occurrence of a road surface abnormality. For example, the server control unit 11 may determine the occurrence of a road surface abnormality on a road set by the user and which particularly requires repair, and may update the reliability, which will be described later.

Alternatively, the server control unit 11 may switch the vehicle 5 that acquires the detection value of the vehicle-mounted sensor 7 to execute the road surface abnormality point processing shown in FIGS. 5 and 6. For example, the server control unit 11 may switch the vehicle 5 for which the detected value is acquired according to the day of the week or the time, determine the occurrence of a road surface abnormality, update the reliability described later, or the like based on the acquired detected value. good.

Further, the device for determining the occurrence of road surface abnormality is not limited to the server device 3. For example, the navigation device 6 of the vehicle 5 may determine the occurrence of a road surface abnormality at an arbitrary point. Then, the navigation device 6 provides information such as information indicating whether or not a road surface abnormality has occurred at an arbitrary point, information on the detection value of the vehicle-mounted sensor 7 when the road surface abnormality is detected, information on the road surface abnormality point (position coordinates and time), and the like. It may be transmitted to the device 3.

Further, the detected value transmitted from the navigation device 6 to the server device 3 is not limited to the value of the pulse signal of the vehicle speed sensor. The detected value to be transmitted may be, for example, a value such as a wheel speed calculated from a pulse signal of a vehicle speed sensor, a value of the height of unevenness of the road surface estimated from the degree of vibration, or the like. Therefore, the detected value in the present application is not limited to the detected value itself detected by the in-vehicle sensor 7, and may be a value calculated or estimated from the detected value. Further, the vehicle-mounted sensor 7 that detects the pothole is not limited to the vehicle speed sensor. For example, as the vehicle-mounted sensor 7, a vertical acceleration sensor that detects the vertical acceleration acting on the wheels of the vehicle 5 may be adopted. Then, the server control unit 11 may determine, for example, the height of the unevenness of the road surface or the depth of the pothole, that is, the occurrence of the road surface abnormality, based on the fluctuation of the vertical acceleration detected by the vertical acceleration sensor. Further, for example, the server control unit 11 uses a suspension sensor that detects the amount of expansion and contraction (displacement amount of the suspension arm) of the suspension device of the wheel and a vehicle height sensor that detects the displacement amount of the vehicle height as the in-vehicle sensor 7. , The height of the unevenness of the road surface may be estimated from the difference between the displacement amount of the suspension arm and the displacement amount of the vehicle height, and the occurrence of the pot hole may be determined.

Moreover, the type of road surface abnormality is not limited to potholes. For example, the road may be cracked, the road may be uplifted, or the road surface may be frozen. For example, the server control unit 11 may analyze the image data captured by the vehicle-mounted camera (vehicle-mounted sensor 7) to determine the cracking of the road (occurrence of road surface abnormality).

When the server control unit 11 determines in S1 that the occurrence of a road surface abnormality has been detected at an arbitrary point, the server control unit 11 executes S2. In S2, the server control unit 11 determines whether or not the occurrence of a road surface abnormality is detected at an arbitrary point of the processing target set in S1 (hereinafter, may be referred to as an arbitrary point of the processing target). The server control unit 11 executes S3 when it detects the occurrence of a road surface abnormality (S2: YES), and executes S11 in FIG. 6 when it does not detect the occurrence of a road surface abnormality (S2: NO).

In S3, the server control unit 11 determines whether or not the road surface abnormality is detected for the first time at an arbitrary point to be processed. As described above, the server control unit 11 sets an arbitrary point at a predetermined distance on the road on which the vehicle 5 travels. Therefore, the set arbitrary points include the points where the potholes are generated and the points where the potholes are not generated. Further, as will be described later, when the server control unit 11 makes an affirmative judgment in S3 (S3: YES), by executing S4 and S5, the server control unit 11 newly registers the arbitrary point for processing as a road surface abnormality point in the management DB 14. To do. Therefore, in S3, the server control unit 11 refers to the management DB 14 and determines whether or not the arbitrary point to be processed, that is, the arbitrary point where the road surface abnormality is detected in S2 is already registered in the management DB 14.

As shown in FIG. 4, the management DB 14 registers information on longitude and latitude for each road surface abnormality point. For example, when the road surface abnormality point having the same longitude and the same latitude as the arbitrary point to be processed is not registered in the management DB 14, the server control unit 11 makes an affirmative judgment in S3 (S3: YES) and executes S4. do. Further, when the road surface abnormality point having the same longitude and the same latitude as the arbitrary point to be processed is registered in the management DB 14, the server control unit 11 makes a negative determination in S3 (S3: NO) and executes S6. .. In S3, the server control unit 11 is not limited to the case of the same longitude and the same latitude, but when a road surface abnormality point within a certain distance from an arbitrary point to be processed is registered in the management DB 14, S3 You may make a negative judgment with. This constant distance is within the range of error in the detection accuracy of the position, which may be determined as the same point between the arbitrary point and the road surface abnormality point. As a result, a plurality of points included in the detection error range can be processed as one arbitrary point (road surface abnormality point).

In S4, the server control unit 11 sets an initial value as the reliability of an arbitrary point to be processed. This initial value is, for example, a value of 100. The reliability is updated from this value of 100 to a larger value or a smaller value. Therefore, the reliability is not a value indicating the probability itself that a road surface abnormality has occurred, but a value that fluctuates according to the probability. When the server control unit 11 executes S4, it executes S5. In S5, the server control unit 11 registers the information shown in FIG. 4 in the management DB 14 with respect to the arbitrary point to be processed. That is, an arbitrary point for processing is newly registered in the management DB 14. When S5 is executed, the server control unit 11 ends the road surface abnormality point processing shown in FIGS. 5 and 6. The server control unit 11 executes the processing after S1 at an arbitrary point for dealing with the next processing. The server control unit 11 executes the processing shown in FIGS. 5 and 6 until the processing at an arbitrary point is completed for all of the driving data for one day acquired from each vehicle 5.

As shown in FIG. 4, the management DB 14 of the probe information DB 12 includes information related to the above (a) to (h). For example, in the data (record) in the first row of the management DB 14 shown in FIG. 4, NO is "NO.0001", the detection date and time is "2020/02/19 XX: XX", the longitude is "x2", and the latitude is. The data of the road surface abnormality point of "y30" is stored.

(A) The NO of the road surface abnormality point is, for example, an identification number assigned by the server control unit 11 in order to identify the information (record) of each road surface abnormality point of the management DB 14. (B) The detection date and time is, for example, the date and time when the detected value is detected by the vehicle-mounted sensor 7 of the vehicle 5. The detection date is not limited to the date and time when the detection value is detected by the in-vehicle sensor 7, and may be, for example, the date and time when the detection value information is transmitted from the navigation device 6 to the server device 3.

(C) The longitude of the road surface abnormality point and (d) the latitude of the road surface abnormality point are, for example, the vehicle 5 based on the current position detection unit 31 (see FIG. 3) transmitted from the navigation device 6 of the vehicle 5 to the server device 3. It is location information. That is, the longitude and latitude of the road surface abnormality point (arbitrary point to be registered) are the position coordinates of the point where the vehicle 5 was traveling when the road surface abnormality was detected. The information on the longitude and latitude of the road surface abnormality point is not limited to the information on the current position detection unit 31. For example, the server control unit 11 may detect the position of the vehicle 5 and register the detected information in the management DB 14 as the longitude and latitude information of the road surface abnormality point.

(E) The detected value of the vehicle-mounted sensor is a detected value detected by the vehicle-mounted sensor 7 of the vehicle 5 when the road surface abnormality is detected. More specifically, for example, the detected value is a value of an output signal of a vehicle speed sensor or a vertical acceleration sensor attached to the vehicle 5, a value obtained by sampling the output signal, a maximum value, a minimum value, or the like. When cracks on the road surface are detected by image processing, the detected values may be, for example, image data of an in-vehicle camera, the length of cracks detected by image processing, the ratio of crack occurrence locations per unit area, and the like.

(F) The vehicle ID is information that can identify the vehicle 5 that has traveled at an arbitrary point (road surface abnormality point) for processing. As the vehicle ID, for example, the serial number of the navigation device 6 and the identification information (vehicle body number, etc.) set in the navigation device 6 can be adopted. Alternatively, the vehicle ID may be a value set by the server control unit 11 for each vehicle 5. The server control unit 11 may set a unique symbol or number for each vehicle as a vehicle ID and notify the navigation device 6 of each vehicle 5. Then, the navigation device 6 may transmit the vehicle ID received from the navigation device 6 together with the detection value of the vehicle-mounted sensor 7.

As will be described later, the server control unit 11 repeatedly executes the processes of FIGS. 5 and 6 based on the detected values of the plurality of vehicles 5 to update the reliability of the road surface abnormality point. Therefore, when updating the reliability, the server control unit 11 obtains information such as (b) detection date and time, (e) detection value, and (f) vehicle ID described above for the same road surface abnormality point. The information of the record of the management DB 14 may be updated by adding or overwriting.

(G) The reliability is a value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point, and is, for example, a value that fluctuates according to the probability. As described above, the server control unit 11 sets 100 (initial value) as the reliability of the new road surface abnormality point. Then, the server control unit 11 updates the reliability of the registered road surface abnormality point. More specifically, the server control unit 11 updates the reliability based on the presence / absence of detection of a road surface abnormality determined based on the detection value of the vehicle-mounted sensor 7 after registration. This makes it possible to improve the accuracy of reliability. Therefore, (g) reliability indicates the magnitude of the probability that the road surface abnormality has occurred at the road surface abnormality point and the reliability of the information when the information on the road surface abnormality point is provided to the road administrator or the like.

The number of times of traveling in (h) is information indicating how many times the same vehicle 5 has traveled at the abnormal road surface point. The server control unit 11 sets the number of trips to "1" when registering a new road surface abnormality point. Then, as will be described in detail later, the server control unit 11 adds the number of trips by +1 each time S7 or S13 is executed (every time the same vehicle 5 travels on the same road surface abnormality point). For example, the server control unit 11 individually measures the number of trips for each vehicle 5 (vehicle ID) at one road surface abnormality point. The server control unit 11 changes the amount of change for adding or subtracting the reliability according to the number of times of traveling for each vehicle 5.

When the server control unit 11 registers the information of (a) to (h) shown in FIG. 4 in the management DB 14 for the arbitrary point to be processed in S5 of FIG. 5, the server control unit 11 ends the process shown in FIGS. 4 and 5. .. As a result, the road surface abnormality point newly detected by the vehicle-mounted sensor 7 of the vehicle 5 is registered in the management DB 14, and an initial value (for example, 100) is set as the reliability. The method of registering a new road surface abnormality point is not limited to the method using the in-vehicle sensor 7 described above. For example, when an inspector who inspects a road finds a small pothole for which follow-up observation is desired, the point may be registered in the management DB 14 as a road surface abnormality point. That is, although repair is not necessary immediately, a person may manually newly register the point where repair is required due to the expansion of the pothole as a road surface abnormality point in the management DB 14. As a result, the reliability of the registered road surface abnormality point is updated by the processing of the server control unit 11. Then, as will be described later, road repair can be efficiently performed by performing inspections, repairs, and the like with priority given to road surface abnormal points having higher reliability.

Further, for example, a point requiring periodic inspection, that is, a point where detection of road surface abnormality is expected may be registered in the management DB 14 as a new road surface abnormality point. For example, the road administrator operates the PC 4 and registers the road surface abnormality point in the management DB 14 at the time when the inspection is required. Also in this case, the reliability of the registered road surface abnormality point is updated by the processing of the server control unit 11, and the road is repaired according to the reliability. Therefore, the "point where the road surface abnormality is newly detected" in the present application is not limited to the point where the road surface abnormality is detected by the in-vehicle sensor 7, but also the point where a person determines the detection, the detection of the road surface abnormality from the past results, etc. It may be a point where it is judged that is expected.

Returning to FIG. 5, the server control unit 11 has S6 when the arbitrary point to be processed is registered in the management DB 14 in S3, that is, when a road surface abnormality has been detected in the past (S3: NO). To execute. Here, there is a possibility that erroneous detection may occur in the process of determining the occurrence of a road surface abnormality in S2. For example, if pebbles, dust, fruits of roadside trees, etc. have fallen on the road surface, the detection value of the vehicle speed sensor may fluctuate, and the server control unit 11 may determine that a pothole has occurred in S2. be. Therefore, the server control unit 11 of the present embodiment executes a process of updating the reliability after setting the initial value of the reliability in S4 described above. When S6 or later is executed, it means that the road surface abnormality has been detected multiple times at the same road surface abnormality point. That is, there is a high possibility that the road surface abnormality has occurred at the road surface abnormality point. Therefore, the server control unit 11 executes the processing after S6 to increase the reliability.

In S6, the server control unit 11 determines whether or not the traveling vehicle has already traveled at an arbitrary point for processing. The server control unit 11 determines whether or not the vehicle ID of the vehicle 5 traveling at the arbitrary point for processing and the vehicle ID of the road surface abnormality point determined to have been registered in S3 match. That is, it is determined whether or not the vehicle 5 traveling at the arbitrary point of the processing countermeasure in which the road surface abnormality is detected in this processing is the vehicle 5 that has detected the road surface abnormality in the past at the same road surface abnormality point. For example, when the server control unit 11 executes S8 described later and executes S5 (when it is a different vehicle 5), the vehicle 5 traveling at an arbitrary point for this processing in the vehicle ID column of the management DB 14 Add the vehicle ID of. Then, for example, in the determination process of S6 from the next time onward, the server control unit 11 sets the vehicle ID of the vehicle 5 traveling at an arbitrary point for processing to the item of the vehicle ID of the road surface abnormality point determined to have been registered in S3. When it exists in a plurality of stored vehicle IDs, it is determined that the vehicle IDs match (S6: YES).

In S6, the server control unit 11 makes an affirmative determination when the vehicle ID of the vehicle 5 traveling at an arbitrary point for processing measures and the vehicle ID of the road surface abnormality point determined to have been registered in S3 match (S6: YES). ), S7 is executed. In S7, the server control unit 11 sets +20 as the amount of change that increases the reliability of the road surface abnormality point.

The server control unit 11 executes S5 after executing S7. The server control unit 11 does not newly register an arbitrary point to be processed, and adds +20 to the reliability of the road surface abnormality point at the same point as the arbitrary point for processing (S5). As a result, the reliability can be increased based on the fact that the road surface abnormality is detected by the same vehicle 5 at the same road surface abnormality point. Further, when the server control unit 11 executes S5 after executing S7, the server control unit 11 adds the number of times of traveling at the road surface abnormality point corresponding to the vehicle 5 by +1. That is, a process of adding the number of trips is performed for each vehicle 5.

On the other hand, if the vehicle ID of the vehicle 5 traveling at the arbitrary point for processing and the vehicle ID of the road surface abnormality point determined to be registered in S3 do not match in S6, the server control unit 11 makes a negative determination (S6). : NO), S8 is executed. In S8, the server control unit 11 sets +10 as the amount of change that increases the reliability of the road surface abnormality point. The server control unit 11 executes S5 after executing S8, and adds +10 to the reliability of the road surface abnormality point at the same point as the arbitrary point for processing. As a result, the reliability can be increased based on the fact that the road surface abnormality is detected by different vehicles 5 at the same road surface abnormality point. Further, the server control unit 11 adds the vehicle ID of the vehicle 5 to the management DB 14 when, for example, S8 is executed and S5 is executed, that is, when a road surface abnormality is detected in the vehicle 5 which has not been registered in the past. ..

Here, for example, when the driver of the vehicle 5 travels on an abnormal road surface for the first time, if a pothole suddenly appears at the destination, there is a high possibility that the driver cannot avoid it. On the other hand, during the second and subsequent driving, the driver may travel avoiding the pothole because he / she has a memory of the past driving. In other words, if a road surface abnormality is detected even after the second time, there is a high possibility that a pothole has occurred, such as a pothole having an unavoidable position or size. Therefore, in the server control unit 11 of the present embodiment, the amount of change (+20) that increases the reliability when the road surface abnormality is detected during the second and subsequent driving of S7 is set to the road surface abnormality during the first traveling of S8. Increase (increase) compared to the amount of change (+10) that increases reliability when detected. As a result, the reliability can be changed according to the above-mentioned driving situation, and the accuracy of the reliability can be improved.

Further, as described above, when the road surface abnormality is detected in the same vehicle 5 many times after the second time, it is more likely that a pothole has occurred. Therefore, in S7, the server control unit 11 of the present embodiment changes the amount of change that increases the reliability according to the number of times that the same vehicle 5 has traveled on the same road surface abnormality point. For example, the server control unit 11 determines the number of times of traveling at an arbitrary point for processing, based on the number of times of traveling of the management DB 14. As described above, the server control unit 11 measures, for example, the number of trips for each vehicle 5 (vehicle ID) at one road surface abnormality point. The server control unit 11 increases the reliability by +20, +30 each time the number of times the same vehicle 5 has traveled on the same road surface abnormality point increases to 2, 3, 4, and so on. , +40 ... and increase (increase). As a result, the reliability can be changed according to the above-mentioned driving situation, and the accuracy of the reliability can be improved.

The server control unit 11 may reduce (decrease) the amount of change for increasing the reliability to +20, +15, +10 as the number of trips increases. For example, when a road surface abnormality is detected only in a specific vehicle 5 many times, there is a possibility that the false detection is peculiar to the vehicle 5 (vehicle-mounted sensor 7). When the reliability is updated based on such a design concept, the amount of change that increases the reliability may be gradually reduced (decreased) as the number of trips increases. Further, the server control unit 11 does not have to change the amount of change that increases the reliability even if the number of trips increases in S7. In this case, since the number of trips is not required, the server control unit 11 does not have to register the number of trips in the management DB 14. Further, the server control unit 11 may change the amount of change that increases the reliability of S8 according to the number of times S8 is executed. For example, if a road surface abnormality is detected many times by vehicles 5 having different types of in-vehicle sensors 7 and tire sizes at the same road surface abnormality point, it is possible that a pothole actually occurs at the road surface abnormality point. The sex becomes high. Therefore, the server control unit 11 increases the reliability, for example, as the number of times S8 is executed increases, that is, as the number of times that a different vehicle 5 detects a road surface abnormality at the same road surface abnormality point increases. The amount of change may be increased (increased) to +10, +20, +30 ....

Further, the server control unit 11 may use a fixed value as a change amount for increasing the reliability regardless of the number of trips and the presence or absence of the same vehicle 5. For example, the server control unit 11 does not have to execute the determination of the identity of the vehicle 5 of S6. For example, when the server control unit 11 makes a negative determination in S3, S8 may be executed and S5 may be executed. In this case, the reliability is updated with the same amount of change (+10) every time a road surface abnormality is detected at the same road surface abnormality point regardless of whether the vehicle is the same vehicle 5.

Further, when the server control unit 11 does not detect the occurrence of a road surface abnormality at an arbitrary point to be processed in S2 (S2: NO), the server control unit 11 executes S11 in FIG. In S11, the server control unit 11 determines whether or not the arbitrary point to be processed is registered in the management DB 14. In S11, the server control unit 11 makes an affirmative judgment in S11 when a road surface abnormality point having the same longitude and the same latitude as the arbitrary point to be processed is registered in the management DB 14, as in S3 of FIG. S11: YES), S12 is executed. Further, when the road surface abnormality point having the same longitude and the same latitude as the arbitrary point to be processed is not registered in the management DB 14, the server control unit 11 makes a negative determination in S11 (S11: NO). If no road surface abnormality is detected in this run and no road surface abnormality is detected in the past, it is unlikely that the road surface abnormality has occurred at any point to be processed. Therefore, when the server control unit 11 makes a negative determination in S11 (S11: NO), the server control unit 11 does not register the arbitrary point to be processed in the management DB 14, and ends the processing shown in FIGS. 5 and 6. In the processing of S11, the server control unit 11 is not limited to the same longitude and the same latitude, but when a road surface abnormality point within a certain distance from an arbitrary point to be processed is registered in the management DB 14, S11 You may make a positive judgment with.

When S12 is executed, the vehicle 5 passes through the once registered road surface abnormality point and the road surface abnormality is not detected. In this case, there is a high possibility that a pothole has not occurred at the registered road surface abnormality point, that is, there is a high possibility that a road surface abnormality has been erroneously detected. Therefore, the server control unit 11 executes the process after S12 to lower the reliability, contrary to the case where the above-mentioned road surface abnormality is detected.

In S12, similarly to S6, the server control unit 11 determines whether or not the traveling vehicle has already traveled at an arbitrary point for processing. The server control unit 11 matches the vehicle ID of the vehicle 5 traveling at an arbitrary point for processing and the vehicle ID of the road surface abnormality point determined to have been registered in S11 (multiple vehicle IDs when a plurality of vehicles are registered). Judge whether or not. That is, it is determined whether or not the vehicle 5 traveling at an arbitrary point for processing measures that did not detect the road surface abnormality this time detected the road surface abnormality at the same road surface abnormality point in the past.

In S12, the server control unit 11 makes an affirmative determination when the vehicle ID of the vehicle 5 traveling at an arbitrary point for processing measures and the vehicle ID of the road surface abnormality point determined to have been registered in S12 match (S12: YES). ), S13 is executed. In S13, the server control unit 11 sets -3 as the amount of change that lowers the reliability of the road surface abnormality point.

The server control unit 11 executes S14 after executing S13. In S14, the server control unit 11 determines whether or not the reliability of the road surface abnormality point determined to be registered in S12 is equal to or less than a predetermined value when the reliability is lowered by the amount of change set in S13. .. The predetermined value used in S14 is, for example, a value of 0 (zero). The lower the reliability, the higher the possibility that the road surface abnormality has not occurred at the road surface abnormality point, that is, the false detection has occurred.

Therefore, when the server control unit 11 determines in S14 that the reliability is equal to or less than a predetermined value when the reliability is lowered by the amount of change set in S13 (S14: YES), the road surface determined to be registered in S12. Cancel the registration of the abnormal point (S15). For example, the server control unit 11 deletes the data (record) of the road surface abnormality point determined to have been registered in S12 from the management DB 14 (S15). As a result, the reliability becomes a predetermined value (for example, zero) or less, and the road surface abnormality point having a high possibility of erroneous detection can be deleted from the management DB 14. Further, in the process of displaying the road surface abnormality point described later on the screen of the PC 4, the server control unit 11 of the present embodiment performs a process of not displaying the road surface abnormality point whose registration was canceled in S15. When S15 is executed, the server control unit 11 ends the processes shown in FIGS. 5 and 6.

The method of canceling the registration in S15 is not limited to the method of deleting data from the management DB 14 described above. For example, the server control unit 11 may register the status information indicating that the registration has been canceled in association with the data of the road surface abnormality point to be canceled without deleting the data from the management DB 14. As a result, the information of the road surface abnormality point whose registration has been canceled (determined as erroneous detection) in the past can be accumulated in the management DB 14.

Further, the server control unit 11 executes S5 in FIG. 5 when the reliability is higher than zero in S14 (S14: NO). The server control unit 11 does not execute new registration of an arbitrary point to be processed, and subtracts the reliability of the road surface abnormality point at the same point as the arbitrary point for processing measures by -3 (S5). As a result, when the road surface abnormality is detected in the past by the same vehicle 5 at the same road surface abnormality point and the road surface abnormality is not detected thereafter, the reliability is lowered. Further, when the server control unit 11 executes S5 after executing S13, the server control unit 11 adds the number of times of traveling at the road surface abnormality point by +1.

On the other hand, when the server control unit 11 does not match the vehicle ID of the vehicle 5 traveling at the arbitrary point for processing in S12 with the vehicle ID of the road surface abnormality point determined to have been registered in S11 (S12: NO). Execute S16. In S16, the server control unit 11 sets −5 as the amount of change that lowers the reliability of the road surface abnormality point. The server control unit 11 executes S14 as in the case of S13, and performs S5 when the reliability after the change is not equal to or less than a predetermined value (S14: NO). The server control unit 11 subtracts the reliability of the road surface abnormality point at the same point as the arbitrary point for processing, by -5. As a result, the reliability of the road surface abnormality point where the road surface abnormality was detected in the past can be lowered when the road surface abnormality is not detected in the different vehicle 5 thereafter.

Here, for example, when the driver of the vehicle 5 travels on an abnormal road surface for the first time, if a pothole suddenly appears at the destination, there is a high possibility that the driver cannot avoid it. On the other hand, during the second and subsequent driving, the driver may travel while avoiding road surface abnormalities because he / she has a memory of the past driving. In other words, even if the road surface abnormality is not detected during the second and subsequent driving, there is a possibility that the road surface abnormality is not detected because the driver avoids the abnormal part. That is, it is highly possible that no road surface abnormality has occurred in the non-detection during the first run, but the driver may have avoided the non-detection during the second and subsequent runs, although a pothole has occurred. be. Therefore, the amount of change (-3) that lowers the reliability during the second and subsequent runs is reduced (reduced) as compared with the amount of change (-5) that lowers the reliability during the first run. As a result, it is possible to prevent the reliability from becoming excessively low due to non-detection due to the driver avoiding the pothole.

Further, for example, as the number of times the driver travels on the same road surface abnormality point increases, the driver can more accurately grasp the position where the pothole is generated, so that the driver is more likely to avoid the road surface abnormality point. Therefore, in S13, the server control unit 11 of the present embodiment changes the amount of change that lowers the reliability according to the number of times that the same vehicle 5 has traveled on the same road surface abnormality point. For example, the server control unit 11 sets the amount of change that lowers the reliability every time the number of times the same vehicle 5 has traveled on the same road surface abnormality point increases to 2, 3, 4, and so on. It is further reduced (decreased) to 3, -2, -1 ... As a result, the reliability can be changed according to the above-mentioned driving situation, and the accuracy of the reliability can be improved. As described above, the server control unit 11 of the present embodiment can change the reliability according to the presence / absence of detection of road surface abnormality, the identity of the vehicle 5, and the number of times of travel, and can improve the accuracy of the reliability.

When the server control unit 11 reduces the amount of change that lowers the reliability, the amount of change reaches a predetermined value of -3, -2, -1, -1, -1, -1, -1, ... May be fixed. Further, the server control unit 11 does not have to change the amount of change (change amount of S13) that lowers the reliability according to the number of trips. Further, the server control unit 11 may increase (increase) the amount of change that lowers the reliability to -3, -4, -5 as the number of trips increases. For example, if the road surface abnormality is not detected in the same vehicle 5 many times, the road surface abnormality detected during the first traveling may be a false detection. When the reliability is updated based on such a design concept, the amount of change that lowers the reliability may be increased (increased) as the number of trips increases. Further, the server control unit 11 may change the amount of change that lowers the reliability according to the number of times S16 is executed. For example, if a vehicle 5 having a different type of in-vehicle sensor 7 and a different tire size does not detect a road surface abnormality many times at the same road surface abnormality point, it is highly possible that a pothole has not occurred at the road surface abnormality point. Become. Therefore, the server control unit 11 determines the reliability every time, for example, the number of times S16 is executed increases, that is, every time the number of times that the road surface abnormality is not detected in different vehicles 5 at the same road surface abnormality point increases. The amount of change to be lowered may be gradually increased to -5, -6, -7 ....

Further, the server control unit 11 does not have to execute the determination of the identity of the vehicle 5 in S12. For example, when the server control unit 11 makes an affirmative decision in S11, for example, S16 may be executed and S14 may be executed. In this case, the reliability is updated with the same amount of change (-5) every time the road surface abnormality is not detected at the same road surface abnormality point regardless of whether the vehicle is the same vehicle 5.

Further, the server control unit 11 adds the number of trips corresponding to one vehicle 5 by +1 in both the case where the road surface abnormality is detected (S7, S5) and the case where the road surface abnormality is not detected (S13, S5). .. That is, the number of runs at the time of detection and the number of runs at the time of non-detection were treated as the same. However, the server control unit 11 may process the number of runs at the time of detection and the number of runs at the time of non-detection as different numbers of runs. For example, when the server control unit 11 executes S7 and S5, the number of trips for detection may be added by +1. Then, in the process of S7, the server control unit 11 may change the amount of change for increasing the reliability based on the number of trips for detection. Further, for example, when the server control unit 11 executes S13 and S5, the number of runs for non-detection may be added by +1. Then, in the process of S13, the server control unit 11 may change the amount of change that lowers the reliability based on the number of trips for non-detection.

Next, the display processing of the road surface abnormality point registered in the management DB 14 by the server control unit 11 of the server device 3 will be described. For example, the road administrator operates the PC 4 to access the server device 3. The road administrator inputs information on the road surface abnormality point to be displayed, for example, longitude and latitude information, place name, road name, intersection name, NO of the road surface abnormality point, and the like on the PC4. The PC 4 transmits the input information to the server device 3. The server control unit 11 of the server device 3 acquires map information from the server-side map information DB 13 based on the received information on the road surface abnormality point. The server control unit 11 acquires the road surface abnormality point existing on the map of the acquired map information from the management DB 14, and displays it on the map.

FIG. 7 shows an example of a display screen displayed on the display 61 of the PC 4. As shown in FIG. 7, the server control unit 11 displays the road surface abnormality point 65 as a predetermined mark (a circle mark in the illustrated example) on the map of the map information 63. The server device 3 receives, for example, an operation input to the PC 4, and updates the map position, the display magnification, and the road surface abnormality point 65 to be displayed. As a result, the road administrator who operates the PC 4 can confirm the road surface abnormality point 65 in the area to be seen.

Based on the management DB 14, the server control unit 11 displays, for example, the reliability information 67 indicating the reliability of the road surface abnormality point 65 near the road surface abnormality point 65. As a result, the road manager can easily grasp the reliability of each road surface abnormality point 65 displayed on the map. Further, for example, when the mouse cursor 69 is set to an arbitrary road surface abnormality point 65 by the operation input of the PC 4, the server control unit 11 erases the reliability information 67 and blows out the detailed information of the road surface abnormality point 65. Display as 71.

The server control unit 11 displays, for example, the information (road surface abnormality point NO, detection date and time, reliability, etc.) registered in the management DB 14 in the balloon 71. As a result, the road administrator can confirm the detailed information of the road surface abnormality point 65 by confirming the contents of the balloon 71.

The server control unit 11 may display information other than the information of the management DB 14 shown in FIG. 4 in the balloon 71. For example, the server control unit 11 may display a photograph of the road surface abnormality point 65 taken by the vehicle-mounted camera of the vehicle 5 in the balloon 71. As a result, the road manager can appropriately determine the priority of inspection and repair for the road surface abnormality point 65 by checking the photograph together with the reliability, the detected value, and the like. Further, the server control unit 11 may display information other than the information of the management DB 14 shown in FIG. 4 on the map information 63. For example, the server control unit 11 may display the position information 73 of the repair vehicle or the inspection vehicle on the map. As a result, the road manager can appropriately dispatch the repair vehicle or the like to the high-priority road surface abnormality point 65 based on the position / reliability of the road surface abnormality point 65 and the position information 73 of the repair vehicle or the like.

Further, the server control unit 11 executes a process of not displaying the unregistered road surface abnormality point 65 on the map in S15 of FIG. As a result, the reliability becomes a predetermined value or less, and the road surface abnormality point 65 having a high possibility of erroneous detection can be hidden. Since the information on the road surface abnormality point 65, which has a high possibility of false detection, is not provided to the road administrator, the road makes an erroneous judgment such as dispatching a repair vehicle to the road surface abnormality point 65 where no road surface abnormality has occurred. It can suppress what the administrator does.

As described in detail above, in the road surface abnormality registration system 1 according to the present embodiment, the server control unit 11 of the server device 3 registers the point where the road surface abnormality is newly detected as the road surface abnormality point 65 (S4, S5). .. The server control unit 11 sets the reliability for the occurrence of the road surface abnormality at the road surface abnormality point 65 (S4). The server control unit 11 updates the reliability based on the detection value detected by the vehicle-mounted sensor 7 included in the vehicle 5 when the vehicle 5 traveling on the road travels on the road surface abnormality point 65 (S7, S8, S13, S16). The server control unit 11 cancels the registration of the road surface abnormality point 65 for the road surface abnormality point 65 whose reliability is equal to or less than a predetermined value (S15).

According to this, the road surface abnormality point 65 in which a new road surface abnormality is detected is registered, and the initial value of the reliability indicating the probability that the road surface abnormality has occurred at the road surface abnormality point 65 is set. The server control unit 11 updates the reliability based on the detection value of the vehicle-mounted sensor 7 of the vehicle 5 traveling on the road. As a result, the information on the road surface abnormality can be speedily provided to the road manager or the like by registering the road surface abnormality point 65 and setting the reliability at an early stage of the newly detected timing. In addition, if pebbles, dust, fruits of roadside trees, etc. have fallen on the road surface, there is a risk that road surface abnormalities will be erroneously detected. Therefore, the registration of the road surface abnormality point 65 is canceled for the road surface abnormality point 65 whose reliability value is equal to or less than the predetermined value. By updating the reliability while excluding the registration of the road surface abnormality point 65 due to erroneous detection based on the detection value of the in-vehicle sensor 7, it is possible to provide the information of the road surface abnormality point 65 while improving the accuracy of the reliability.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various improvements and modifications can be made without departing from the gist of the present invention.
For example, another device may execute the process of the server device 3 in the above embodiment. For example, the navigation device 6 may determine whether or not a road surface abnormality has occurred based on the detection value of the vehicle-mounted sensor 7.
Further, the server control unit 11 raises the reliability (S7, S8) when the road surface abnormality is detected based on the detection value of the in-vehicle sensor 7 (S2: YES), and when the road surface abnormality is not detected (S2). : NO), the process of lowering the reliability (S13, S16) was executed. However, the server control unit 11 may execute only one of the processing for increasing the reliability (S7, S8) or the processing for decreasing the reliability (S13, S16).
Further, the server control unit 11 does not have to execute the process (S14, S15) of canceling the registration of the road surface abnormality point 65 based on the fact that the reliability becomes a predetermined value or less. In this case, the reliability of the road surface abnormality point 65, which has a high possibility of false detection, is not limited and decreases (becomes smaller). The road administrator may cancel the registration of the unreliable road surface abnormality point 65, if necessary. Further, for example, the server control unit 11 may inquire to the road administrator or the like whether or not to cancel the registration of the road surface abnormality point 65 whose reliability is equal to or less than a predetermined value.
Further, in the above embodiment, the reliability, which is a number without a unit, is used as a value indicating the probability that the road surface abnormality of the present application has occurred, but the present invention is not limited to this. For example, the value indicating the probability may be the value of the probability of percentage notation such as 80% itself, or may be a fractional notation such as 5/4. Alternatively, the value indicating the probability may be represented by characters such as extremely high probability of occurrence, slightly high, high, normal, low, and the like. For example, the server control unit 11 may display a value indicating the probability of the road surface abnormality point 65 whose reliability is in the range of 101 to 110 as “high”.

Further, although the embodiment in which the road surface abnormality registration device according to the present invention is embodied has been described above, the road surface abnormality registration device can also have the following configuration, and in that case, the following effects are obtained.

For example, the first configuration is as follows.
A registration means (11) for registering a newly detected point of road surface abnormality as a road surface abnormality point (65), and a value (reliability in the embodiment) indicating the probability that the road surface abnormality has occurred at the road surface abnormality point. Based on the value setting means (11) to be set and the detection value for detecting the road surface abnormality by the sensor (7) provided in the vehicle when the vehicle (5) traveling on the road travels on the road surface abnormality point. An updating means (11) for updating the value indicating the probability set by the value setting means, and a canceling means for canceling the registration of the road surface abnormal point for the road surface abnormal point whose value indicating the probability is equal to or less than a predetermined value. (11) and a road surface abnormality registration device (3).

According to the road surface abnormality registration device having the above configuration, the road surface abnormality point where a new road surface abnormality is detected is registered, and the initial value of the value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point is set. Then, the road surface abnormality registration device updates the value indicating the probability based on the detection value of the sensor of the vehicle traveling on the road. As a result, the information on the road surface abnormality can be provided speedily by registering the road surface abnormality point and setting the value indicating the probability at an early stage of the newly detected timing. In addition, if pebbles, dust, fruits of roadside trees, etc. have fallen on the road surface, there is a risk that road surface abnormalities will be erroneously detected. Therefore, the registration of the abnormal road surface point is canceled for the abnormal road surface point whose value indicating the probability is equal to or less than the predetermined value. By updating the value indicating the probability while eliminating the registration of the road surface abnormality point due to erroneous detection based on the detection value of the sensor, it is possible to provide the information on the road surface abnormality while improving the accuracy of the value indicating the probability.

The second configuration is as follows.
When the road surface abnormality is detected based on the detected value (S2: YES), the updating means (11) increases the value indicating the probability (S7, S8), and the road surface is based on the detected value. When no abnormality is detected (S2: NO), the value indicating the probability is reduced (S13, S16), the road surface abnormality registration device (3).

According to the road surface abnormality registration device having the above configuration, when the road surface abnormality is detected again by the sensor of the vehicle traveling on the road, there is a high possibility that the road surface abnormality has occurred, so the value indicating the probability is increased. Further, if the sensor of the vehicle traveling on the road cannot detect the road surface abnormality, it may be an erroneous detection, so the value indicating the probability is reduced. Therefore, the vehicle traveling on the road can be used as a sensor to improve the accuracy of the value indicating the probability.

The third configuration is as follows.
The updating means (11) determines the amount of change of the value indicating the probability according to the number of times the same vehicle (5) has traveled on the same road surface abnormality point (65) (S6, S12). , Road surface abnormality registration device (3).

When the same vehicle travels on the same road surface abnormality point, the driver may remember that the road surface abnormality such as cracks and unevenness of the road surface had occurred the last time the vehicle was driven. Therefore, the driver is more likely to avoid the road surface abnormality every time the vehicle is driven. Therefore, the accuracy of the value indicating the probability can be further improved by changing the amount of change of the value indicating the probability according to the number of times of traveling.

The fourth configuration is as follows.
When the road surface abnormality is not detected based on the detected value (S2: NO), the updating means (11) reduces the value indicating the probability (S13, S16), and the same vehicle (5). The amount of change (S13) that reduces the value indicating the probability when the road surface abnormality is not detected in the second and subsequent trips in which the number of trips traveling on the same road surface abnormality point (65) is the same for the first time. The road surface abnormality registration device (3) reduces the value indicating the probability when the road surface abnormality is not detected, as compared with the amount of change (S16).

When the driver encounters a road surface abnormality such as a crack or unevenness of the road during the first driving, there is a possibility that the driver cannot avoid the abnormal part where the road surface abnormality has occurred and travels. In other words, if no road surface abnormality is detected during the first run, it is highly possible that no road surface abnormality has occurred on the road.

On the other hand, during the second and subsequent driving, the driver may travel while avoiding road surface abnormalities because he / she has a memory of the past driving. In other words, even if the road surface abnormality is not detected during the second and subsequent driving, there is a possibility that the road surface abnormality is not detected because the driver avoids the abnormal part. Therefore, the amount of change that reduces the value indicating the probability during the second and subsequent runs is reduced as compared with the amount of change that reduces the value indicating the probability during the first run. As a result, it is possible to prevent the accuracy of the value indicating the probability from being lowered due to the non-detection caused by the driver avoiding the abnormal portion. As a result, the accuracy of the value indicating the probability can be improved.

The fifth configuration is as follows.
The updating means (11) further reduces the amount of change that reduces the value indicating the probability as the number of trips increases (S13), and is a road surface abnormality registration device (3).

For example, the more the driver travels, the more likely he / she is to avoid the abnormal location where the road surface abnormality has occurred. In this case, when the number of trips is increased, the credibility of the result that the road surface abnormality is not detected becomes lower. Therefore, the accuracy of the value indicating the probability can be improved by further reducing the amount of change in which the value indicating the probability is decreased according to the increase in the number of trips.

1 Road surface abnormality registration system 3 Server device (road surface abnormality registration device)
5 Vehicle 7 In-vehicle sensor (sensor)
11 Server control unit (registration means, value setting means, update means, release means)
65 Abnormal road surface

Claims (6)

A registration method for registering a newly detected road surface abnormality point as a road surface abnormality point,
A value setting means for setting a value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point, and a value setting means.
Update to update the value indicating the probability set by the value setting means based on the detection value for detecting the road surface abnormality by the sensor provided in the vehicle when the vehicle traveling on the road travels on the road surface abnormality point. Means and
With respect to the road surface abnormality point whose value indicating the probability is equal to or less than a predetermined value, a cancellation means for canceling the registration of the road surface abnormality point and a means for canceling the registration.
A road surface abnormality registration device equipped with. The update means
When the road surface abnormality is detected based on the detected value, the value indicating the probability is increased, and when the road surface abnormality is not detected based on the detected value, the value indicating the probability is decreased. Item 1. The road surface abnormality registration device according to Item 1. The update means
The road surface abnormality registration device according to claim 1 or 2, wherein the change amount of the value indicating the probability is determined according to the number of times the same vehicle has traveled on the same road surface abnormality point. The update means
When the road surface abnormality is not detected based on the detected value, the value indicating the probability is reduced, and the road surface is traveled the same number of times that the same vehicle travels at the same road surface abnormality point for the second and subsequent times. The amount of change that reduces the value indicating the probability when no abnormality is detected is reduced compared to the amount of change that reduces the value indicating the probability when the road surface abnormality is not detected in the first run. The road surface abnormality registration device according to any one of claims 1 to 3. The update means
The road surface abnormality registration device according to claim 4, wherein as the number of trips increases, the amount of change that reduces the value indicating the probability is further reduced. A computer program that registers abnormal road surface points.
Computer,
A registration means for registering a newly detected road surface abnormality point as the road surface abnormality point, and
A value setting means for setting a value indicating the probability that the road surface abnormality has occurred at the road surface abnormality point, and a value setting means.
Update to update the value indicating the probability set by the value setting means based on the detection value for detecting the road surface abnormality by the sensor provided in the vehicle when the vehicle traveling on the road travels on the road surface abnormality point. Means and
With respect to the road surface abnormality point whose value indicating the probability is equal to or less than a predetermined value, a cancellation means for canceling the registration of the road surface abnormality point and a means for canceling the registration.
A computer program to make it work.

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