Road deterioration diagnosis device, road deterioration diagnosis method, and program

Abstract

Efficiently manage road deterioration in line with maintenance patterns. A storage unit (2) stores, for each section obtained by dividing a predetermined area into sections of a predetermined size, a detection status indicating whether road deterioration has been detected within the section, and deterioration information including the maintenance status of the detected road deterioration. A display control unit (3) causes a display means to display a map showing the deterioration information for each section.

Description

[Technical field]

[0001] The present disclosure relates to a road deterioration diagnosis device, a road deterioration diagnosis method, and a recording medium. [Background technology]

[0002] There is a known system for determining road deterioration by analyzing images and acceleration collected by traveling vehicles. For example, Patent Document 1 discloses a road surface condition determination device that performs image processing on images of the road surface to determine the condition of the road surface. Patent Document 2 discloses a device that automatically detects areas requiring repair based on the detected road surface condition and displays them on a map.

[0003] When road deterioration is detected from information collected from vehicles in this way, road management companies (such as local governments) dispatch workers to the location (site) where the road deterioration was detected to confirm the current state and repair the condition after confirmation, thereby maintaining the road. In addition, as a general form of maintenance, the workers not only maintain only the detected road deterioration on-site, but also, if they find other road deterioration in the vicinity of the road deterioration (for example, within the range that can be visually confirmed), they also check and repair the newly found road deterioration. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-140789 A [Patent Document 2] JP 2018-154986 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the device disclosed in Patent Document 2, each detected road deterioration is displayed on a map. That is, each road deterioration is managed as a repair-needed location. In general, in order to quickly find road deterioration that requires early repair, such as potholes, operators repeatedly drive vehicles in an area to detect road deterioration. For this reason, when road deterioration occurs in a concentrated manner in a small area, when managing each road deterioration, it becomes necessary to manage a large number of road deteriorations in that area, which becomes cumbersome. However, considering the maintenance form of the workers on-site described above, there is no need to manage each road deterioration in a small area. Note that Patent Document 1 does not disclose managing road deterioration on a map.

[0006] An object of the present disclosure is to provide a road deterioration diagnosis device, a road deterioration diagnosis method, and a recording medium that can solve the above-mentioned problems and efficiently manage road deterioration in accordance with the maintenance form. [Means for solving the problem]

[0007] A first road deterioration diagnosis device in one embodiment of the present disclosure includes a memory means for storing deterioration information for each section obtained by dividing a specified area into sections of a specified size, the deterioration information including the detection status of potholes within the section and the maintenance status of the detected potholes, and a display control means for causing a display means to display a map showing the deterioration information for each section.

[0008] A second road deterioration diagnosis device in one embodiment of the present disclosure comprises a memory means for storing deterioration information for each section obtained by dividing a specified area into sections of a specified size, the deterioration information including the detection status of road deterioration within the section and the maintenance status of the detected road deterioration, an update means for, when road deterioration is detected in a section where the detection status is undetected, setting the detection status of the section to detected, updating the maintenance status of the section according to the maintenance status of the road deterioration, and updating the detection status to undetected after a specified period of time has elapsed since updating the maintenance status to the specified status, and a display control means for causing a display means to display a map showing the deterioration information for each section.

[0009] A road deterioration diagnosis method in one aspect of the present disclosure includes storing deterioration information for each section obtained by dividing a specified area into sections of a specified size, the deterioration information including the detection status of potholes within the section and the maintenance status of the detected potholes, and displaying a map showing the deterioration information for each section on a display means.

[0010] A recording medium in one aspect of the present disclosure records a program that causes a computer to execute a process of storing deterioration information for each partition obtained by dividing a specified area into a specified size, the deterioration information including the detection status of potholes within the partition and the maintenance status of the detected potholes, and displaying a map showing the deterioration information for each partition on a display means. Effect of the Invention

[0011] An advantage of the present disclosure is that road deterioration can be efficiently managed in accordance with maintenance patterns. [Brief description of the drawings]

[0012] [Figure 1] 1 is a block diagram showing a configuration of a road deterioration diagnosis system 10 according to a first embodiment. [Diagram 2] 1 is a block diagram showing an example of the configuration of a road deterioration diagnosis device 20 in a first embodiment. [Diagram 3] FIG. 4 is a diagram illustrating an example of sensor information in the first embodiment. [Figure 4] FIG. 4 is a diagram showing an example of a detection result of road deterioration in the first embodiment. [Diagram 5] FIG. 4 is a diagram showing an example of degradation information in the first embodiment. [Figure 6] FIG. 4 is a diagram showing an example of a confirmation result of road deterioration in the first embodiment. [Figure 7] FIG. 4 is a diagram showing an example of a repair result of road deterioration in the first embodiment. [Figure 8] 5 is a flowchart showing a road deterioration detection process in the first embodiment. [Figure 9]13 is a flowchart showing a maintenance status update process in the first embodiment. [Figure 10] 10 is a flowchart showing an expiration date process in the first embodiment. [Figure 11] FIG. 4 is a diagram showing an example of time-series changes in detection status and maintenance status in deterioration information of a certain section in the first embodiment. [Figure 12] FIG. 11 is a diagram showing another example of time-series changes in the detection status and maintenance status in the deterioration information of a certain section in the first embodiment. [Figure 13] 5 is a flowchart showing a road deterioration position display process in the first embodiment. [Figure 14] FIG. 4 is a diagram showing an example of displaying degradation information on a map in the first embodiment. [Figure 15] FIG. 4 is a diagram showing an example of displaying detailed information of degradation information in the first embodiment. [Figure 16] FIG. 11 is a block diagram showing a configuration of a road deterioration diagnosis device 1 in a second embodiment. [Figure 17] FIG. 5 is a block diagram showing an example of the hardware configuration of a computer 500. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (First embodiment) A first embodiment will be described.

[0014] (System Configuration) First, the configuration of a road deterioration diagnosis system in the first embodiment will be described. Fig. 1 is a block diagram showing the configuration of a road deterioration diagnosis system 10 in the first embodiment. Referring to Fig. 1, the road deterioration diagnosis system 10 includes a road deterioration diagnosis device 20, a display device 30, and a plurality of vehicles 40_1, 40_2, ... 40_N (N is a natural number) (hereinafter, collectively referred to as vehicles 40) which are moving bodies. The moving bodies may be motorcycles, bicycles, drones, robots or vehicles with automatic driving functions, or people (pedestrians).

[0015] The vehicle 40 acquires predetermined sensor information acquired by a mounted sensor. The sensor information includes an image, acceleration, acquisition date and time, and a position. The image is, for example, an image of the road surface captured (acquired) by an imaging device such as a drive recorder camera mounted on the vehicle 40 while the vehicle 40 is traveling on the road. The acceleration is, for example, an acceleration sensor that detects (acquires) unevenness of the road surface as vertical vibration while the vehicle 40 is traveling on the road. The position is, for example, a position acquired by a position detection sensor such as a Global Positioning System (GPS) when the imaging device captures an image or the acceleration sensor acquires acceleration. The vehicle 40 transmits sensor information including the image, acceleration, acquisition date and time of these information, and the position to the road deterioration diagnosis device 20. For example, latitude and longitude may be used as the position. In the present embodiment, a case where the sensor information includes both an image and acceleration will be described, but the present invention is not limited thereto, and at least one of the image and acceleration may be included.

[0016] The road deterioration diagnosis device 20 detects road deterioration based on sensor information transmitted from the vehicle 40. Here, the road deterioration diagnosis device 20 divides the ground surface of each area into sections and manages the detected road deterioration for each section. The road deterioration diagnosis device 20 displays the deterioration information for each section on the display device 30, thereby presenting the deterioration information to a user of the road deterioration diagnosis device 20. Here, the user is, for example, an employee of the business operator (manager or worker).

[0017] The road deterioration diagnosis device 20 and the display device 30 are placed, for example, in an operator's facility management facility. The road deterioration diagnosis device 20 and the display device 30 may be integrated or separate. The road deterioration diagnosis device 20 may also be placed outside the operator's facility management facility. In this case, the road deterioration diagnosis device 20 may be realized by a cloud computing system. The display device 30 is one embodiment of the display means of the present disclosure.

[0018] A known technique using image analysis or acceleration is used for detecting road deterioration based on sensor information. For example, a method of analyzing road deterioration using AI (Artificial Intelligence) is used for detecting road deterioration using image analysis. For example, a method of detecting road deterioration using acceleration is used for detecting the degree of unevenness of the road surface using acceleration in the direction perpendicular to the road surface.

[0019] Fig. 2 is a block diagram showing an example of the configuration of a road deterioration diagnosis device 20 in the first embodiment. As shown in Fig. 2, the road deterioration diagnosis device 20 includes a sensor information acquisition unit 21, a sensor information storage unit 22, a deterioration detection unit 23, a deterioration information update unit 24, a section information storage unit 25, a deterioration information storage unit 26, and a display control unit 27. Note that the section information storage unit 25, the deterioration information update unit 24, and the display control unit 27 are embodiments of the storage means, update means, and display control means of the present disclosure.

[0020] The sensor information acquiring unit 21 acquires sensor information from the vehicle 40. The sensor information acquiring unit 21 outputs the acquired sensor information to the sensor information storage unit 22.

[0021] The sensor information storage unit 22 stores the sensor information output by the sensor information acquisition unit 21. Fig. 3 is a diagram showing an example of the sensor information in the first embodiment. In the example of Fig. 3, the sensor information includes date and time, position, image, and acceleration. The date and time indicates the date and time when the vehicle 40 acquired the image and acceleration. The position indicates the position where the image and acceleration were acquired.

[0022] The deterioration detection unit 23 detects road deterioration based on at least one of the image and the acceleration included in the sensor information. Here, the deterioration detection unit 23 detects, for example, potholes as road deterioration. A pothole is a hole with a diameter of, for example, about 0.1 to 1 m that occurs on the paved surface of the road. The deterioration detection unit 23 is not limited to this, and may detect cracks, rutting, etc. as road deterioration. The deterioration detection unit 23 may also detect road deterioration based on an index indicating road deterioration. In this case, for example, a crack rate, a rutting amount, flatness, MCI (Maintenance Control Index), IRI (International Roughness Index), etc. are used as the index. The deterioration detection unit 23 detects road deterioration when the value of the index exceeds a predetermined threshold.

[0023] In the first embodiment, a case where the deterioration detection unit 23 detects a pothole as road deterioration will be described below as an example.

[0024] The deterioration detection unit 23 outputs the detection result regarding the detected road deterioration to the deterioration information update unit 24.

[0025] Fig. 4 is a diagram showing an example of a detection result of road deterioration in the first embodiment. In the example of Fig. 4, the detection result includes a detection date and time, a detection position, and an image of the detection source. Here, the detection date and time, the detection position, and the detection source image are the date and time, the position, and the image, respectively, included in the sensor information in which the road deterioration (pothole) is detected.

[0026] The deterioration information update unit 24 specifies the section in which road deterioration has been detected, based on the position included in the sensor information in which road deterioration has been detected and the section (mesh) information stored in the section information storage unit 25. Then, the deterioration information update unit 24 sets and updates the deterioration information of each section stored in the deterioration information storage unit 26, based on the detection result of road deterioration obtained from the deterioration detection unit 23.

[0027] Fig. 5 is a diagram showing an example of deterioration information in the first embodiment. In the example of Fig. 5, the deterioration information includes a detection status, a maintenance status, a detection result, a confirmation result, a repair result, and an expiration date.

[0028] The detection status is an item that indicates whether road deterioration has been detected in a certain section. The detection status is set to "not detected" which indicates that road deterioration has not been detected, or "detected" which indicates that road deterioration has been detected.

[0029] The maintenance status is an item that indicates the status of maintenance for road deterioration in a certain section. The maintenance status can be set to "unconfirmed", which indicates that the road deterioration has not been confirmed on-site (waiting for confirmation), "confirmed", which indicates that the road deterioration has been confirmed on-site (waiting for repair), or "repaired", which indicates that repairs have been made. Hereinafter, the maintenance statuses "unconfirmed", "confirmed", and "repaired" are also referred to as the first status, the second status, and the third status, respectively.

[0030] The detection result is set to the detection result of the above-mentioned road deterioration.

[0031] The confirmation result and the repair result are respectively set to the on-site confirmation result and the repair result by the worker etc. The confirmation result and the repair result are transmitted from, for example, a mobile terminal of the worker (not shown).

[0032] Fig. 6 is a diagram showing an example of a confirmation result of road deterioration in the first embodiment. In the example of Fig. 6, the confirmation result includes a confirmation date and time, a confirmation position, a confirmation image, and a confirmation comment. Here, the confirmation date and time, the confirmation position, the confirmation image, and the confirmation comment are respectively the date and time when the road deterioration confirmation work was performed, the position, the image of the confirmed road deterioration, and the comment of the worker who confirmed it.

[0033] Fig. 7 is a diagram showing an example of a repair result of road deterioration in the first embodiment. In the example of Fig. 7, the repair result includes the repair date and time, the repair position, the repair image, and the repair comment. Here, the repair date and time, the repair position, the repair image, and the repair comment are the date and time when the repair work for the road deterioration was performed, the position, the image of the repaired road deterioration, and the comment of the worker who performed the repair, respectively.

[0034] The expiration date is set to the expiration date of the deterioration information. Here, for deterioration information with a maintenance status of "confirmed", a date and time that is a predetermined confirmed valid period from the date and time when the maintenance status is updated to "confirmed" is set as the expiration date. Also, for deterioration information with a maintenance status of "repaired", a date and time that is a predetermined repaired valid period from the date and time when the maintenance status is updated to "repaired" is set as the expiration date. Hereinafter, these confirmed valid periods and repaired valid periods are also referred to as the first valid period and the second valid period, respectively. The confirmed valid period and repaired valid period are set in advance according to predetermined conditions (for example, the repair history, traffic volume, material, etc. of the road in the section).

[0035] When road deterioration is detected in a section whose detection status is "undetected", the deterioration information update unit 24 sets the detection status of the section to "detected".

[0036] The deterioration information update unit 24 updates the maintenance status of the deterioration information of a section according to the maintenance status of road deterioration of the section. In addition, when the validity period of the deterioration information of a section has expired, the deterioration information update unit 24 initializes the deterioration information of the section (setting the detection status to "undetected").

[0037] In the example of FIG. 5, in section ID "001", a pothole has not been detected, and the deterioration information has a detection status of "not detected". In section ID "002", a pothole has been detected, but an on-site check has not been performed, and the deterioration information has a detection status of "detected", a maintenance status of "unconfirmed", and a detection result. In section ID "003", a pothole has been detected, and an on-site check has been performed, and the deterioration information has a detection status of "detected", a maintenance status of "confirmed", a detection result, a check result, and an expiration date based on the confirmed validity period of "E003". In section ID "004", a pothole has been detected, and a repair has been performed, and the deterioration information has a detection status of "detected", a maintenance status of "repaired", a detection result, a check result, a repair result, and an expiration date based on the repair validity period of "E004".

[0038] The section information storage unit 25 stores, as section (mesh) information, for example, sections (meshes) obtained by dividing the ground surface of each region into predetermined sizes based on latitude and longitude lines, and section IDs (mesh codes) that identify each of the sections. The size of the sections is, for example, a size that can be visually confirmed by an on-site maintenance worker. For example, the sections and section IDs are based on a standard area mesh created by an administrative agency such as a national government, a divided area mesh that is further subdivided from the standard area mesh, or an area mesh that is further subdivided from the divided area mesh. For example, a mesh with a side length of about 15.6 m or a mesh shorter than that may be used as the area mesh.

[0039] The deterioration information storage unit 26 stores deterioration information of each partition. The deterioration information storage unit 26 stores the deterioration information of each partition in association with the partition ID of the partition, as shown in FIG.

[0040] The display control unit 27 acquires the deterioration information from the deterioration information storage unit 26, and causes the display device 30 to display the deterioration information for each section in a predetermined display mode, for example.

[0041] Next, the operation of the first embodiment will be described.

[0042] (Road deterioration detection processing) The road deterioration detection process will be described. The road deterioration detection process is a process for updating deterioration information for each section regarding road deterioration detected based on sensor information transmitted from each vehicle 40. The road deterioration detection process will be described below using the sensor information in FIG. 3 and the deterioration information in FIG. 5.

[0043] 8 is a flowchart showing road deterioration detection processing in the first embodiment. The sensor information acquisition unit 21 of the road deterioration diagnosis device 20 acquires, for example, sensor information (date and time, position, image, and acceleration) transmitted from the vehicle 40 (step S11). For example, the sensor information acquisition unit 21 acquires sensor information as shown in FIG. 3. The sensor information acquisition unit 21 stores the acquired sensor information in the sensor information storage unit 22.

[0044] The deterioration detection unit 23 acquires sensor information from the sensor information storage unit 22, and detects road deterioration at the position of the sensor information based on the acquired sensor information (step S12). If road deterioration is detected (step S13 / Yes), the deterioration detection unit 23 outputs the detection result to the deterioration information update unit 24. For example, if a pothole is detected by the sensor information at the date and time "TD002" in Fig. 3, the deterioration detection unit 23 outputs the detection result "D002" in Fig. 4 to the deterioration information update unit 24.

[0045] If no road deterioration is detected (step S13 / No), the process is repeated from step S11.

[0046] Based on the detection result, the deterioration information update unit 24 acquires the partition ID of the partition in which road deterioration was detected (step S14). Here, the deterioration information update unit 24 refers to the partition information stored in the partition information storage unit 25, determines the partition that includes the detected position of road deterioration, and acquires the partition ID of the partition. For example, the deterioration information update unit 24 acquires the partition ID "002" of the partition that includes the detected position "L002" of the detection result ID "D002".

[0047] The deterioration information update unit 24 acquires the deterioration information of the section in which road deterioration has been detected, which is stored in the deterioration information storage unit 26 (step S15).

[0048] If the detection status of the acquired deterioration information is "undetected" (step S16 / undetected), the deterioration information update unit 24 sets the detection status of the deterioration information to "detected" (step S17). Also, the deterioration information update unit 24 sets the maintenance status of the deterioration information to "unconfirmed" (step S18). Furthermore, the deterioration information update unit 24 sets the detection result acquired from the deterioration detection unit 23 to the deterioration information (step S19).

[0049] For example, if the detection result "D002" is obtained when the detection status of the section "002" is "undetected", the degradation information of the section "002" is set as shown in FIG.

[0050] In this case, the deterioration information update unit 24 may notify the user via the display device 30, etc., that the detection status of the deterioration information has been set to "detected" (road deterioration has been detected within the section).

[0051] Thereafter, the process is repeated from step S11.

[0052] Moreover, when the detection status of the acquired deterioration information is "detected" (step S16 / detected), the process from step S11 is repeated without updating the detection status or maintenance status of the deterioration information.

[0053] (Maintenance status update process) The maintenance status update process will be described. The maintenance status update process is a process for updating the maintenance status of the deterioration information according to the maintenance status of the detected road deterioration. The maintenance status update process is executed when the road deterioration diagnosis device 20 acquires the confirmation result or repair result of the road deterioration transmitted from the mobile terminal of the worker or the like.

[0054] 9 is a flowchart showing the maintenance status update process in the first embodiment. The deterioration information update unit 24 of the road deterioration diagnosis device 20 acquires the confirmation result or the repair result (step S21).

[0055] The deterioration information update unit 24 acquires the section ID of the section where the confirmation or repair was performed based on the confirmation result or repair result (step S22). Here, the deterioration information update unit 24 refers to the section information stored in the section information storage unit 25, determines the section that includes the confirmation position or repair position, and acquires the section ID of the section. Note that if the acquired confirmation result or repair result includes the section ID of the section where the confirmation or repair was performed, the deterioration information update unit 24 may use the section ID.

[0056] When the confirmation result is acquired (step S23 / confirmation result), the degradation information update unit 24 updates the maintenance status of the degradation information of the section where the confirmation was performed to "confirmed" (step S24). The degradation information update unit 24 also sets the confirmation result in the degradation information (step S25). Furthermore, the degradation information update unit 24 sets the expiration date of the degradation information based on the confirmed validity period (step S26).

[0057] For example, when the maintenance status of the section "003" is "unconfirmed", if a confirmation result of the section is obtained, the deterioration information of the section "003" is updated as shown in FIG.

[0058] When the repair result is acquired (step S23 / repair result), the deterioration information update unit 24 updates the maintenance status of the deterioration information of the section where the repair was performed to "repaired" (step S27). The deterioration information update unit 24 also sets the repair result in the deterioration information (step S28). Furthermore, the deterioration information update unit 24 sets the expiration date of the deterioration information to an expiration date based on the repaired validity period (step S29).

[0059] For example, when the maintenance status of section "004" is "confirmed", if the results of repairs to the section are obtained, the deterioration information of section "004" is updated as shown in FIG.

[0060] (Expiration date processing) The expiration date process is described below. The expiration date process is a process for initializing the deterioration information of each partition when the expiration date of the deterioration information of the partition has passed. The expiration date process is repeatedly executed at predetermined intervals.

[0061] FIG. 10 is a flowchart showing the expiration date process in the first embodiment.

[0062] The degradation information update unit 24 selects one section (step S31).

[0063] The deterioration information update unit 24 acquires the deterioration information of the selected section from the deterioration information storage unit 26 (step S32).

[0064] If the current time has passed the expiration date of the deterioration information of the selected section (step S33 / Yes), the deterioration information update unit 24 initializes the deterioration information. That is, the deterioration information update unit 24 sets the detection status of the deterioration information to "undetected" and erases information other than the detection status (step S34). In this case, the deterioration information update unit 24 may notify the user, via the display device 30 or the like, that the detection status of the deterioration information has been set to "undetected" (that the expiration date of the maintenance status in the section, "confirmed" and "repaired", has passed).

[0065] The deterioration information update unit 24 may store the deterioration information before initialization in a storage unit (not shown). As a result, as described later, even after the expiration date, the deterioration information with the maintenance status of "checked" or "repaired" that has expired can be presented to the user.

[0066] The degradation information update unit 24 repeats the process from step S31 for all sections stored in the degradation information storage unit 26 (step S35).

[0067] (Example of updating degradation information) Here, a specific example of deterioration information update accompanying the above-mentioned road deterioration detection process, maintenance status update process, and expiration date process will be described.

[0068] FIG. 11 is a diagram showing an example of time-series changes in the detection status and maintenance status in the deterioration information of a certain section in the first embodiment.

[0069] As shown in FIG. 11, when a pothole is detected within the section based on sensor information when a vehicle 40 travels through the section at time T1, the deterioration information update unit 24 sets the detection status to “detected” (step S17) and sets the maintenance status to “unconfirmed” (step S18).

[0070] Next, at time T2, if a pothole is confirmed by a worker on-site, the deterioration information update unit 24 updates the maintenance status to "confirmed" (step S24) and sets an expiration date based on the confirmed validity period (step S26).

[0071] Thereafter, even if a pothole is detected at the same location as at time T1 or at a different location within the section based on sensor information at times T3 and T4 before the expiration date, the detection status will be maintained as “detected” and the maintenance status will be “confirmed.”

[0072] Next, when the expiration date has passed, the deterioration information update unit 24 initializes the deterioration information (sets the detection status to "undetected") (step S34).

[0073] Furthermore, if a pothole is detected within the section based on sensor information when the vehicle 40 travels through the section at time T8, the deterioration information update unit 24 sets the detection status to “detected” (step S17) and sets the maintenance status to “unconfirmed” (step S18).

[0074] In this embodiment, when the maintenance status of the deterioration information is set to "confirmed" in this manner, even if a pothole is detected, the detection status is maintained as "detected" and the maintenance status is maintained as "confirmed." This makes it possible to prevent unnecessary management of information about confirmed potholes that are detected when the vehicle 40 is driven repeatedly, and other potholes that can be confirmed and repaired when the pothole is repaired.

[0075] In this embodiment, when the expiration date has passed, the detection status is set to "undetected," and when a pothole is detected again, the detection status is set to "detected" and the maintenance status is set to "unconfirmed." Therefore, even if a confirmed pothole is not repaired, the information about the pothole will be managed again as the vehicle 40 continues to travel, preventing a situation in which the pothole is left unattended.

[0076] FIG. 12 is a diagram showing another example of time-series changes in the detection status and the maintenance status in the deterioration information of a certain section in the first embodiment.

[0077] In FIG. 12, the degradation information update unit 24, similar to FIG. 11, sets the detection status to “detected” and the maintenance status to “unconfirmed” at time T1 (steps S17, S18), and updates the maintenance status to “confirmed” at time T2 (step S24).

[0078] Next, at time T5, if the pothole is repaired on-site by a worker, the deterioration information update unit 24 updates the maintenance status to "repaired" (step S27) and sets the expiration date based on the repair validity period (step S29).

[0079] Thereafter, even if a pothole is detected at the same location as at time T1 or at a different location within the section based on sensor information at times T6 and T7 before the expiration date, the detection status will be maintained as “detected” and the maintenance status will be “repaired.”

[0080] Next, when the expiration date has passed, the deterioration information update unit 24 initializes the deterioration information (sets the detection status to "undetected") (step S34).

[0081] Furthermore, the degradation information update unit 24 sets the detection status to "detected" and the maintenance status to "unconfirmed" at time T8, similarly to FIG. 11 (steps S17 and S18).

[0082] In general, when detecting deterioration using images, there is a possibility that a repaired pothole will be erroneously detected as a pothole for some time after the repair.

[0083] In this embodiment, when the maintenance status of the deterioration information is set to "repaired" in this manner, even if a pothole is detected, the detection status is maintained as "detected" and the maintenance status is maintained as "repaired." Therefore, when the vehicle 40 repeatedly travels through an area where there are repair marks, it is possible to prevent a situation in which the repair marks of the pothole are erroneously detected as a pothole and unnecessary information is provided.

[0084] In order to further reduce such false detection of potholes, the deterioration detection unit 23 may use a stricter value than usual as the detection threshold for deterioration detection using images during the effective repair period.

[0085] (Road deterioration location display processing) The road deterioration position display process is a process for displaying deterioration information on a map.

[0086] 13 is a flowchart showing the road deterioration position display process in the first embodiment. The display control unit 27 receives a map display request from the user of the road deterioration diagnosis device 20 (step S41).

[0087] The display control unit 27 acquires the deterioration information of each section stored in the deterioration information storage unit 26 (step S42).

[0088] The display control unit 27 displays the acquired deterioration information of each section on the map (step S43). Here, the display control unit 27 displays, for example, the detection status and the maintenance status at the position included in the detection result of the deterioration information of each section.

[0089] Fig. 14 is a diagram showing an example of displaying deterioration information on a map in the first embodiment. The example in Fig. 14 corresponds to the deterioration information in Fig. 5. For example, as shown in Fig. 14, the display control unit 27 displays an icon corresponding to the maintenance status at the position where a pothole was detected in each section with a detection status of "detected". In the example of Fig. 14, the maintenance statuses of "unconfirmed", "confirmed", and "repaired" are displayed with round icons in the colors "black", "gray", and "white", respectively.

[0090] 14, a radio button "including expired" for specifying the display of expired degradation information and a field for specifying the range of the expiration date are displayed. When the display of expired degradation information is specified together with the range of the expiration date, the display control unit 27 may display on the map the expired degradation information stored in a storage unit (not shown) that is within the specified range of the expiration date. In this case, the display control unit 27 may display the expired degradation information in a different manner from other degradation information.

[0091] Furthermore, when the user clicks or places the mouse over an icon, the display control unit 27 may display detailed information such as the detection result, confirmation result, repair result, expiration date, etc. in addition to the detection status and maintenance status of the deterioration information corresponding to the section of the icon. Here, the detailed information may include the detection date and time, the image of the detection source, the confirmation date and time, the confirmation image, the maintenance date and time, and the repair image.

[0092] Fig. 15 is a diagram showing an example of displaying detailed information on degradation information in the first embodiment. In Fig. 15, the icon showing the maintenance status "confirmed" of the partition ID "003" is clicked or moused over, and thus detailed information on the degradation information of the partition is displayed.

[0093] This completes the operation of the first embodiment.

[0094] In the first embodiment, a case has been described in which potholes are detected as road deterioration, and the detection status of potholes and the maintenance status for each section are managed. However, the present invention is not limited to this, and other road deterioration (cracks, rutting, etc.) and road deterioration based on indices (crack rate, rutting amount, flatness, MCI, IRI, etc.) may be detected as road deterioration, and the detection status of road deterioration and the maintenance status for each section may be managed.

[0095] (Effects of the First Embodiment) According to the first embodiment, road deterioration can be efficiently managed in accordance with the maintenance form. The reason is that the deterioration information storage unit 26 of the road deterioration diagnosis device 20 stores, for each section obtained by dividing a predetermined area into a predetermined size, the detection status indicating whether road deterioration has been detected in the section, and the deterioration information including the maintenance status of the detected road deterioration, and the display control unit 27 causes the display device 30 to display a map indicating the deterioration information for each section. This makes it possible to prevent a situation in which management becomes complicated as in the case of managing individual road deterioration in a maintenance form in which a worker simultaneously checks and repairs road deterioration around a position where road deterioration has been detected on-site. For example, the case of managing potholes among road deterioration is an example in which such a maintenance form is adopted based on the urgency of the repair.

[0096] Second embodiment A second embodiment will now be described.

[0097] Fig. 16 is a block diagram showing the configuration of a road deterioration diagnosis device 1 in the second embodiment. Referring to Fig. 16, the road deterioration diagnosis device 1 includes a storage unit 2 and a display control unit 3. The storage unit 2 and the display control unit 3 are embodiments of a storage means and a display control means, respectively.

[0098] The storage unit 2 stores, for each section obtained by dividing a predetermined area into a predetermined size, a detection status indicating whether road deterioration has been detected in the section, and deterioration information including the maintenance status of the detected road deterioration. The display control unit 3 causes the display means to display a map indicating the deterioration information for each section.

[0099] Next, the effects of the second embodiment will be described.

[0100] According to the second embodiment, road deterioration can be efficiently managed in accordance with the maintenance form, because the storage unit 2 stores, for each section obtained by dividing a predetermined area into a predetermined size, a detection status indicating whether road deterioration has been detected in the section, and deterioration information including the maintenance status of the detected road deterioration, and the display control unit 3 causes the display means to display a map indicating the deterioration information for each section.

[0101] (Hardware configuration) In each of the above-described embodiments, each component of the road deterioration diagnosis device 1, 20 represents a functional block. Some or all of the components of each device may be realized by any combination of a computer 500 and a program. This program may be recorded in a non-volatile recording medium. Examples of the non-volatile recording medium include a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc), and an SSD (Solid State Drive).

[0102] Fig. 17 is a block diagram showing an example of a hardware configuration of a computer 500. Referring to Fig. 17, the computer 500 includes, for example, a CPU (Central Processing Unit) 501, a ROM (Read Only Memory) 502, a RAM (Random Access Memory) 503, a program 504, a storage device 505, a drive device 507, a communication interface 508, an input device 509, an output device 510, an input / output interface 511, and a bus 512.

[0103] The program 504 includes instructions for implementing each function of each device. The program 504 is stored in advance in the ROM 502, the RAM 503, or the storage device 505. The CPU 501 implements each function of each device by executing instructions included in the program 504. For example, the CPU 501 of the road deterioration diagnosis device 20 implements the functions of the sensor information acquisition unit 21, the deterioration detection unit 23, the deterioration information update unit 24, and the display control unit 27 by executing instructions included in the program 504. The RAM 503 may also store data to be processed in each function of each device. For example, the RAM 503 of the road deterioration diagnosis device 20 may store data (sensor information) of the sensor information storage unit 22, data (section information) of the section information storage unit 25, data (deterioration information) of the deterioration information storage unit 26, and the like.

[0104] The drive device 507 reads and writes data from and to the recording medium 506. The communication interface 508 provides an interface with a communication network. The input device 509 is, for example, a mouse or a keyboard, and receives information input from an operator or the like. The output device 510 is, for example, a display, and outputs (displays) information to an operator or the like. The input / output interface 511 provides an interface with peripheral devices. The bus 512 connects these hardware components. The program 504 may be supplied to the CPU 501 via a communication network, or may be stored in advance in the recording medium 506, read out by the drive device 507, and supplied to the CPU 501.

[0105] It should be noted that the hardware configuration shown in FIG. 17 is merely an example, and other components may be added, or some components may not be included.

[0106] There are various variations in the method of realizing each device. For example, each device may be realized by any combination of a different computer and program for each component. Furthermore, multiple components of each device may be realized by any combination of a single computer and program.

[0107] In addition, some or all of the components of each device may be realized by general-purpose or dedicated circuits including a processor, etc., or a combination of these. These circuits may be configured by a single chip, or may be configured by multiple chips connected via a bus. Some or all of the components of each device may be realized by a combination of the above-mentioned circuits, etc., and a program.

[0108] Furthermore, when some or all of the components of each device are realized by a plurality of computers, circuits, etc., the plurality of computers, circuits, etc. may be arranged in a centralized manner or in a distributed manner.

[0109] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above embodiments. Various modifications that can be understood by a person skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, the configurations in each embodiment can be combined with each other without departing from the scope of the present disclosure. [Explanation of symbols]

[0110] 1, 20 Road deterioration diagnosis device 2 Storage section 3, 27 Display control unit 10 Road deterioration diagnosis system 21 Sensor information acquisition unit 22 Sensor information storage unit 23 Deterioration detection unit 24 Deterioration information update section 25 Partition information storage unit 26 Deterioration information storage section 500 Computers 501 CPU 502 ROM 503 RAM 504 Program 505 Storage device 506 Recording media 507 Drive Unit 508 Communication Interface 509 Input Device 510 Output Device 511 Input / Output Interface 512 Bus

Claims

1. a storage means for storing deterioration information including a detection status of road deterioration in each section obtained by dividing a predetermined area into a predetermined size and a maintenance status of the detected road deterioration in the section, and a validity period of the deterioration information; an update means for, when road deterioration is detected in a section whose detection status is undetected, setting the detection status of the section to "detected", updating the maintenance status of the section according to the maintenance status of the road deterioration, and updating the detection status to "undetected" after the expiration date has passed since the maintenance status was updated to a predetermined status; a display control means for causing a display means to display a map showing the deterioration information for each of the sections, the display control means displays a map showing the degradation information within a range in which an expiration date is specified, in response to a user operation specifying display of the degradation information whose expiration date has passed. Road deterioration diagnosis device.

2. The update means includes: when the road deterioration is detected in a section whose detection status is undetected, a first status indicating that the road deterioration is unconfirmed is set to the maintenance status of the section; The road deterioration diagnosis device according to claim 1.

3. The update means includes: if road deterioration is identified within the section, updating the maintenance status of the section with a second status indicating that the road deterioration has been identified; setting the detection status of the section to undetected a first period of time after updating the maintenance status to the second status; 3. A road deterioration diagnosis device according to claim 1 or 2.

4. The update means includes: if a road deterioration in the section has been repaired, updating the maintenance status of the section with a third status indicating that the road deterioration has been repaired; setting the detection status of the section to undetected a second time period after updating the maintenance status to the third status; The road deterioration diagnosis device according to any one of claims 1 to 3.

5. The deterioration information includes an original image used for detecting the road deterioration, a confirmation image when the road deterioration is confirmed, and a repair image when the road deterioration is repaired, the display control means displays, in response to a user's operation, one or more of the original image, the confirmation image, and the repair image of each of the sections. The road deterioration diagnosis device according to any one of claims 1 to 4.

6. The display control means displays a field in which a user can specify a range of validity of the degradation information to be displayed. The road deterioration diagnosis device according to any one of claims 1 to 5.

7. The display control means displays the deterioration information whose expiration date has passed in a manner different from other deterioration information. The road deterioration diagnosis device according to any one of claims 1 to 6.

8. The road deterioration is a pothole. The road deterioration diagnosis device according to any one of claims 1 to 7.

9. storing, for each section obtained by dividing a predetermined area into a predetermined size, deterioration information including a detection status of road deterioration in the section and a maintenance status of the detected road deterioration, and a validity period of the deterioration information; When road deterioration is detected in a section whose detection status is "undetected," the detection status of the section is set to "detected," the maintenance status of the section is updated according to a maintenance status of the road deterioration, and after the expiration date has passed since the maintenance status was updated to a predetermined status, the detection status is updated to "undetected," displaying a map showing the deterioration information for each of the sections on a display means; displaying, on the display means, a map showing the degradation information whose expiration date is within a specified range, in response to a user's operation specifying display of the degradation information whose expiration date has passed; Method for diagnosing road deterioration.

10. On the computer, storing, for each section obtained by dividing a predetermined area into a predetermined size, deterioration information including a detection status of road deterioration in the section and a maintenance status of the detected road deterioration, and a validity period of the deterioration information; When road deterioration is detected in a section whose detection status is "undetected," the detection status of the section is set to "detected," the maintenance status of the section is updated according to a maintenance status of the road deterioration, and after the expiration date has passed since the maintenance status was updated to a predetermined status, the detection status is updated to "undetected," displaying a map showing the deterioration information for each of the sections on a display means; displaying, on the display means, a map showing the degradation information whose expiration date is within a specified range, in response to a user's operation specifying display of the degradation information whose expiration date has passed; A program that executes a process.

Images