JP2023143227A - Road surface monitoring system - Google Patents

Abstract

To inexpensively and efficiently detect a deterioration degree of a road surface.SOLUTION: A road surface monitoring system 100 includes: a vehicle information acquisition section 31 for acquiring vehicle information corresponding to a road surface state when the vehicle travels on a road from the vehicle; and a deterioration degree calculation section 32 for calculating a deterioration degree of the road based on the vehicle information. The vehicle information is the information detected without measuring a distance from the vehicle to the road surface of the road in the vehicle. The vehicle information acquisition section 31 acquires the vehicle information based on acceleration information detected by an acceleration sensor incorporated in the vehicle or a head unit 10 being an information unit arranged in the vehicle.SELECTED DRAWING: Figure 2

Description

The present invention relates to a system for monitoring a road surface.

2. Description of the Related Art Conventionally, techniques for monitoring the road surfaces of general roads and expressways and detecting their degree of deterioration have been known. For example, Patent Document 1 discloses that a transverse height measuring section is attached to a vehicle, and a linear marker parallel to the transverse direction of the road surface is measured by irradiating a slit laser from a slit laser oscillator included in the transverse height measuring section. A road surface management system has been disclosed that detects unevenness of the road surface and determines the degree of deterioration by forming markers and photographing the markers using an area camera.

Japanese Patent Application Publication No. 2020-20194

In the road surface management system disclosed in Patent Document 1, it is necessary to prepare a road surface measurement vehicle equipped with a transverse height measuring section including a slit laser oscillator and an area camera as one element of the system. Furthermore, it is necessary to measure the road surface by actually driving the road surface measurement vehicle on the road to be managed. Therefore, there is a problem that a large amount of cost is incurred in introducing and operating the system.

Therefore, an object of the present invention is to provide a technology that can efficiently detect the degree of deterioration of a road surface at low cost.

The road surface monitoring system according to the present invention includes a vehicle information acquisition unit that acquires vehicle information from the vehicle according to the road surface condition when the vehicle travels on the road, and a deterioration unit that calculates the degree of deterioration of the road based on the vehicle information. The vehicle information is information detected in the vehicle without measuring the distance from the vehicle to the road surface.

According to the present invention, it is possible to efficiently detect the degree of deterioration of a road surface at low cost.

1 is a system schematic diagram showing an overview of a road surface monitoring system according to an embodiment of the present invention. 1 is a block diagram showing the configuration of a road surface monitoring system according to an embodiment of the present invention. 5 is a flowchart showing the processing procedure of vehicle information collection processing executed in the head unit. 7 is a flowchart showing the processing procedure of repair determination processing executed in the server according to the first embodiment of the present invention. 5 is a flowchart showing the processing procedure of repair planning processing executed in the server. 10 is a flowchart showing the processing procedure of repair determination processing executed in the server according to the second embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a system schematic diagram showing an overview of a road surface monitoring system according to an embodiment of the present invention. A road surface monitoring system 100 shown in FIG. 1 includes a head unit 10 mounted on a vehicle 1 and a server 20.

The head unit 10 is an information device installed near the driver's seat of the vehicle 1, for example, and collects vehicle information according to road surface conditions when the vehicle 1 travels on the road. The head unit 10 is connected to, for example, an ECU (Electronic Control Unit) (not shown) mounted on the vehicle 1, and each axis direction of the vehicle 1 (front and rear, left and right, Acceleration information (up and down) is collected at regular intervals as information representing the tilt and vibration of the vehicle 1 (hereinafter referred to as "tilt/vibration information") depending on the road surface condition when driving on the road. Then, the collected tilt/vibration information (acceleration information) is combined with position information representing the driving point of the vehicle 1 when the collected information is collected, and the vehicle information corresponding to the road surface condition is obtained through wireless communication such as a mobile phone line. The information is sent to the server 20 via the .

It is preferable that the head unit 10 has various information provision functions to the driver of the vehicle 1 in addition to the vehicle information collection function described above. For example, the head unit 10 can be equipped with a navigation function that sets a destination for the vehicle 1 and guides the vehicle 1 to the destination, a function that displays various information regarding the driving state of the vehicle 1 and the surrounding environment, etc. .

Alternatively, the head unit 10 may include an acceleration sensor, and the acceleration information detected by the acceleration sensor may be collected as the tilt/vibration information of the vehicle 1. Alternatively, an information device such as a smartphone or a tablet PC may be attached to the vehicle 1 and used as the head unit 10.

The server 20 acquires the vehicle information transmitted from the head unit 10, and based on this vehicle information, determines the inclination and shaking of the vehicle 1 when the vehicle 1 travels at each point on the road. The degree of road deterioration is then determined based on the tilt and sway conditions found at each point. Thereby, the degree of deterioration of the road is calculated based on the vehicle information detected in the vehicle 1 without measuring the distance from the vehicle 1 to the road surface. The details of how the server 20 determines the degree of road deterioration will be described later.

Here, the server 20 can acquire vehicle information from a large number of vehicles 1 each equipped with a head unit 10, and uses the vehicle information of each vehicle 1 to determine the degree of road deterioration. This makes it possible to efficiently judge the degree of road deterioration at various locations.

Further, the server 20 determines locations on the road that require repair (hereinafter referred to as "repair locations") based on the determination result of the degree of road deterioration, and creates a road repair plan. Information on the created repair plan is then transmitted to the work vehicle 2 to provide support for the road repair work carried out by the work vehicle 2.

FIG. 2 is a block diagram showing the configuration of a road surface monitoring system according to an embodiment of the present invention.

The head unit 10 includes a data acquisition section 11 and an external communication section 12. The data acquisition unit 11 acquires acceleration information as inclination/vibration information representing the inclination and shaking of the vehicle 1 according to the road surface condition when driving on a road, from an acceleration sensor built into the vehicle 1 or the head unit 10 . The external communication unit 12 has a communication function with the outside, and transmits the tilt/vibration information (acceleration information) acquired by the data acquisition unit 11 and the position information of the vehicle 1 to the server 20 as vehicle information. do.

The server 20 includes a control section 30 and a storage section 40.

The control unit 30 is configured using, for example, a CPU (Central Processing Unit), and performs various processes and calculations necessary for the operation of the server 20 in the road surface monitoring system 100. The control unit 30 executes the programs stored in the storage unit 40 to control the functions of the vehicle information acquisition unit 31, deterioration degree calculation unit 32, repair determination unit 33, repair plan creation unit 34, and repair plan transmission unit 35. Realize the block. Details of these functional blocks will be described later. Note that some or all of the functions of the control unit 30 may be realized using a device other than the CPU, such as a GPU (Graphic Processing Unit), FPGA (Field Programmable Gate Array), or ASIC (Application Specific Integrated Circuit). good.

The storage unit 40 is configured using a large-capacity, nonvolatile storage device such as a magnetic storage device such as an HDD (Hard Disk Drive) or a large-capacity nonvolatile storage device such as an SSD (Solid State Drive), and stores programs executed by the control unit 30 and control Various information used in the processing of the unit 30 is stored. The information stored in the storage unit 40 includes a vehicle information database 41 and a road surface information database 42 . Details of these databases will be described later.

Note that the configuration of the server 20 shown in FIG. 2 may be physically constructed on one computer, or may be distributed and constructed on multiple computers. Further, the server 20 may be realized by a cloud computer installed on the cloud, a virtual machine operating on a virtual environment, or the like.

Next, each functional block of the vehicle information acquisition section 31, deterioration degree calculation section 32, repair determination section 33, repair plan creation section 34, and repair plan transmission section 35 in the control section 30 will be explained.

The vehicle information acquisition unit 31 receives vehicle information transmitted from the head units 10 mounted on each of a plurality of vehicles, thereby acquiring vehicle information collected by each vehicle while driving on a road. The vehicle information of each vehicle acquired by the vehicle information acquisition section 31 is stored in the storage section 40 as a vehicle information database 41.

The deterioration degree calculation unit 32 reads vehicle information of each vehicle that has traveled on the road whose deterioration degree is to be calculated from the vehicle information database 41 stored in the storage unit 40 . Then, based on the read vehicle information of each vehicle, the degree of deterioration of the road is calculated.

The repair determination unit 33 determines whether or not the road needs to be repaired based on the degree of deterioration of the road calculated by the deterioration degree calculation unit 32. For example, if there is a point on the road where the degree of deterioration is greater than or equal to a predetermined value, it is determined that that point requires repair. The determination result of the necessity of repair by the repair determination section 33 is stored in the storage section 40 as a road surface information database 42 representing road surface information regarding the condition of the road surface.

The repair plan creation unit 34 reads out road surface information representing the necessity of repair for each road in the target area for road repair from the road surface information database 42 stored in the storage unit 40 . Then, based on the read road surface information, areas requiring repair are identified and a road repair plan is created.

The repair plan transmitter 35 transmits the repair plan created by the repair plan creator 34 to the work vehicle 2. The repair plan transmitted from the server 20 by the repair plan transmitter 35 is received by the work vehicle 2 and displayed on a head unit (not shown) included in the work vehicle 2 or the like. Thereby, the worker driving the work vehicle 2 can efficiently go around the repair-required areas according to the repair plan and perform the repair work.

Next, the processing procedures of the head unit 10 and the server 20 in the road surface monitoring system 100 of this embodiment will be described below with reference to the flowcharts of FIGS. 3 to 5.

FIG. 3 is a flowchart showing the procedure of vehicle information collection processing executed in the head unit 10. When the ignition of the vehicle 1 is turned on, the head unit 10 starts a vehicle information collection process shown in the flowchart of FIG. 3 .

In step S110, the head unit 10 acquires position information of the point where the vehicle 1 is currently traveling. Here, the position information of the vehicle 1 can be acquired by a well-known method using a GNSS (Global Navigation Satellite System) such as a GPS (Global Positioning System).

In step S120, the head unit 10 determines whether the vehicle 1 has traveled a certain distance since the previous acquisition of the vehicle information, based on the position information acquired in step S110. If the vehicle has not traveled a certain distance, the process returns to step S110 to continue acquiring position information, and if the vehicle has traveled a certain distance, the process advances to the next step S130. Note that an arbitrary distance can be set as the certain distance used in the determination in step S120, and the shorter the distance set, the more detailed vehicle information can be acquired when the vehicle 1 travels on the road. .

In step S<b>130 , the head unit 10 uses the data acquisition unit 11 to acquire tilt/vibration information representing the tilt and shaking of the vehicle 1 . Here, as described above, acceleration information detected by, for example, an acceleration sensor built into the vehicle 1 or the head unit 10 is acquired as tilt/vibration information.

In step S140, the head unit 10 transmits the position information acquired in step S110 and the tilt/vibration information acquired in step S130 to the server 20 as vehicle information of the vehicle 1 using the external communication section 12. The vehicle information transmitted here is received by the vehicle information acquisition unit 31 in the server 20 and stored in the storage unit 40 as part of the vehicle information database 41.

In step S150, head unit 10 determines whether it has detected that the ignition of vehicle 1 has been turned off. If the ignition off is not detected, the process returns to step S110 to continue acquiring position information, and if the ignition off is detected, the vehicle information collection process shown in the flowchart of FIG. 3 is ended.

FIG. 4 is a flowchart showing the processing procedure of the repair determination process executed in the server 20 according to the first embodiment of the present invention. In the server 20 of the present embodiment, the control unit 30 controls the control unit 30 at a predetermined timing, such as when a certain period of time has elapsed since the previous processing or when an instruction is given by a user who operates the server 20, as shown in FIG. The repair determination process shown in the flowchart is started.

In step S210, the control unit 30 identifies a target section of the road for which a repair determination is to be made. Here, for example, a preset road section or a road section specified on a map by a user operating the server 20 using a keyboard or mouse (not shown) can be specified as a target section for repair determination. .

In step S220, the control unit 30 determines whether vehicle information for the target section specified in step S210 exists in the vehicle information database 41. Here, the vehicle information database 41 is searched for vehicle information acquired within the target section based on the position information included in the vehicle information. As a result, if at least one piece of vehicle information within the target section can be retrieved, it is determined that there is vehicle information for the target section, and the process proceeds to step S230. On the other hand, if no vehicle information in the target section could be retrieved, it is determined that there is no vehicle information in the target section, and the process proceeds to step S260.

In step S230, the control unit 30 causes the deterioration degree calculation unit 32 to read and acquire vehicle information for the target section specified in step S210 from the vehicle information database 41. Here, by extracting each piece of vehicle information retrieved at the time of determination in step S220 from the vehicle information database 41, vehicle information for the target section can be acquired.

In step S240, the control unit 30 uses the deterioration degree calculation unit 32 to calculate the shaking and tilting of the vehicle 1 every fixed distance when the vehicle 1 travels in the target section, based on the vehicle information read out in step S230. Calculated as follows. Here, the magnitude of the tilt or vibration that occurs in the vehicle 1 when the vehicle 1 travels a certain distance is calculated based on the tilt/vibration information included in each vehicle information. Thereby, it is possible to estimate the road surface condition of the target section by determining the degree of change in the posture of the vehicle 1 according to the road surface condition.

In step S250, the control unit 30 uses the deterioration degree calculation unit 32 to calculate the degree of deterioration of the road in the target section based on the shaking and inclination of the vehicle 1 calculated for each fixed distance in step S240. Here, for example, by multiplying the calculated magnitude of shaking or inclination by a predetermined coefficient, the degree of road deterioration in the target section can be calculated for each fixed distance. Alternatively, the degree of deterioration of the road in the target section may be calculated for each fixed distance based on a predetermined correspondence between the magnitude of shaking or inclination and the degree of deterioration. In addition to this method, the degree of road deterioration in the target section can be calculated according to the shaking and inclination of the vehicle 1 using any method.

In step S260, the control unit 30 causes the deterioration degree calculation unit 32 to obtain the latest deterioration degree among the deterioration degrees previously calculated in step S250 for the target section specified in step S210. Note that the calculation result of the degree of deterioration obtained through the process in step S250 is recorded in the road surface information database 42 as part of the road surface information by performing the process in step S280, which will be described later. In step S260, the recent degree of deterioration can be obtained by reading the road surface information recorded in the process of step S280 performed in the past from the road surface information database 42.

Once the degree of road deterioration in the target section is determined by the process in step S250 or S260, in the subsequent step S270, the control unit 30 causes the repair determination unit 33 to determine whether the road will be repaired in the target section based on the degree of deterioration. Determine whether it is necessary. For example, the degree of deterioration for each fixed distance in the target section is compared with a predetermined threshold, and if there is a place in the target section where the degree of deterioration is greater than the threshold, that place is determined to be a place that requires repair. , it is determined that the road requires repair. On the other hand, if there is no place within the target section where the degree of deterioration is greater than the threshold, it is determined that road repair is not necessary. Thereby, it is possible to determine whether or not the road in the target section needs to be repaired based on the degree of deterioration calculated by the degree of deterioration calculation unit 32. Note that the repair determination unit 33 may perform the process in step S270 using another method as long as it can appropriately determine whether or not the road in the target section needs to be repaired based on the degree of deterioration.

In step S280, the control unit 30 creates road surface information by associating the degree of road deterioration calculated in step S250 and the necessity of road repair determined in step S270 with date and time information and position information. The information database 42 is updated. As a result, the result of the current repair determination process for the target section is recorded in the road surface information database 42.

After executing the process of step S280, the repair determination process shown in the flowchart of FIG. 4 is ended.

FIG. 5 is a flowchart showing the processing procedure of the repair planning process executed by the server 20. As shown in FIG. In the server 20, the control unit 30 executes the flowchart shown in FIG. Start the repair planning process shown in .

In step S310, control unit 30 identifies a target area for creating a repair plan. Here, an area designated on the map by a worker or a user operating the server 20 using, for example, a keyboard or a mouse (not shown) can be specified as the target area of the repair plan.

In step S320, the control unit 30 causes the repair plan creation unit 34 to read and acquire the road surface information of the target area specified in step S310 from the road surface information database 42. Here, the road surface information of the target area can be acquired by extracting the latest road surface information recorded for each point within the target area from the road surface information database 42.

In step S330, the control unit 30 determines whether there is a repair-required location within the target area based on the road surface information of the target area read out in step S320. Here, if the road surface information for each point acquired in step S320 includes road surface information indicating that it was determined to require repair in step S270 of FIG. 4, it is determined that there is a point requiring repair. The process advances to step S340. On the other hand, if there is no road surface information indicating that it has been determined that repair is required in the obtained road surface information for each point, it is determined that there is no location that requires repair, and the repair planning process shown in the flowchart of FIG. 5 is terminated. do.

In step S340, the control unit 30 causes the repair plan creation unit 34 to determine the geographical location between the repair points based on the road surface information representing the road surface condition of the repair points out of the road surface information of the target area read out in step S320. Get relationships. Here, for example, positional information included in road surface information of repair-required locations is compared, and based on the comparison result, the degree of geographical relationship between repair-required locations is acquired. Specifically, for example, the distance between each point requiring repair is calculated based on location information, and the closer the distance, the higher the value of the degree of geographical relationship, and conversely, the farther the distance, the value of the degree of geographical relationship. The value of the degree of geographical relationship is set for each combination of repair points so that the At this time, the value of the degree of geographical relationship may be changed depending on whether or not the repair-required locations are on the same road. In addition to this, it is possible to obtain the geographical relationship between repair-required locations using any other method.

In step S350, the control unit 30 uses the repair plan creation unit 34 to obtain the degree of congestion at the repair-required location within the target area. For example, by extracting congestion information for road sections that include repair points from congestion information for each road provided as VICS (Vehicle Information and Communication System) (registered trademark) information, we can calculate the degree of congestion at repair points. can be obtained. Alternatively, traffic congestion information other than VICS information may be used as traffic congestion information for areas requiring repair.

In step S360, the control unit 30 causes the repair plan creation unit 34 to determine the priority order of repair for each repair-required location based on the geographical relationship obtained in step S340 and the degree of traffic congestion obtained in step S350. do. Here, for example, a combination of locations requiring repair with a high degree of geographical relationship or a location requiring repair with a high degree of traffic congestion is set with a higher priority than locations requiring repair with a higher degree of congestion. At this time, it is not necessary to consider only one of the conditions and not the other condition. Thereby, it is possible to determine the priority of each repair-required location based on at least one of the geographical relationship between the plurality of repair-required locations and the degree of road congestion at the plurality of repair-required locations.

In step S370, the control unit 30 causes the repair plan creation unit 34 to create a road repair plan for the target area identified in step S310, based on the priority order of each repair-required location determined in step S360. Here, for example, the locations and order of repair work within the target area are determined so that the repair work is performed with priority given to the high-priority repair locations, and the distance traveled during the repair work is as short as possible.

In step S380, the control unit 30 causes the repair plan transmitting unit 35 to transmit the road repair plan created in step S370 to the work vehicle 2. The repair plan transmitted here is received by a head unit (not shown) or the like in the work vehicle 2 and presented to the worker driving the work vehicle 2.

After executing the process of step S380, the repair determination process shown in the flowchart of FIG. 5 is ended.

According to the first embodiment of the present invention described above, the following effects are achieved.

(1) The road surface monitoring system 100 includes a vehicle information acquisition unit 31 that acquires vehicle information from the vehicle 1 according to the road surface condition when the vehicle 1 travels on the road, and calculates the degree of road deterioration based on the vehicle information. and a deterioration degree calculation section 32. The vehicle information is information detected in the vehicle 1 without measuring the distance from the vehicle 1 to the road surface. By doing this, the degree of deterioration of the road surface can be detected efficiently at low cost.

(2) The vehicle information acquisition unit 31 acquires vehicle information based on acceleration information detected by the acceleration sensor built into the vehicle 1 or the head unit 10, which is an information device installed in the vehicle 1. By doing this, it is possible to reliably acquire vehicle information according to the road surface condition when the vehicle 1 travels on the road, without measuring the distance from the vehicle 1 to the road surface.

(3) The vehicle information acquisition unit 31 acquires vehicle information from each of the plurality of vehicles 1 that have traveled on the road. The degree of deterioration calculation unit 32 calculates the degree of deterioration of the road based on the vehicle information acquired from each of the plurality of vehicles 1 (steps S230 to S250). By doing this, it is possible to efficiently determine the degree of road deterioration at various locations.

(4) The road surface monitoring system 100 includes a repair determination unit 33 that determines whether or not road repair is necessary based on the degree of deterioration calculated by the deterioration degree calculation unit 32, and roads that are determined to require repair by the repair determination unit 33. and a repair plan creation section 34 that creates a repair plan for the repair-required locations. By doing this, it is possible to easily create a road repair plan according to the degree of deterioration of the road.

(5) The repair plan creation unit 34 determines the priority order of repair for each of the plurality of repair-requiring locations (step S360), and creates a repair plan based on this priority order (step S370). By doing this, it is possible to create a repair plan that allows the repair work to be carried out by efficiently visiting a plurality of repair-requiring locations.

(6) The repair plan creation unit 34 determines the priority order based on at least one of the geographical relationship between the plurality of repair points and the degree of road congestion at the plurality of repair points (step S340-S360). By doing this, it is possible to appropriately set the priority order for a plurality of repair-requiring locations.

(Second embodiment)
Next, a second embodiment of the present invention will be described. In this embodiment, an example will be described in which, when calculating the degree of road deterioration based on vehicle information, the type of vehicle 1 whose vehicle information is detected is considered.

Note that the road surface monitoring system according to this embodiment has the same configuration as that in FIG. 2 described in the first embodiment. Therefore, the road surface monitoring system of this embodiment will be described below using the configuration of the road surface monitoring system 100 shown in FIG. 2.

In this embodiment, the head unit 10 mounted on the vehicle 1 collects the above-mentioned tilt/vibration information (acceleration information) collected at regular intervals as vehicle information according to the road surface condition when the vehicle 1 travels on the road. In addition to the location information and the location information, vehicle type information representing the vehicle type of the vehicle 1 is also transmitted to the server 20. The vehicle type represented by the vehicle type information distinguishes what type of vehicle (passenger car, truck, bus, etc.) the vehicle 1 is, and reflects differences in tilting and shaking behavior that occur depending on road surface conditions. You can set any car type by doing this.

FIG. 6 is a flowchart showing the processing procedure of the repair determination process executed in the server 20 according to the second embodiment of the present invention. In the server 20 of the present embodiment, the control unit 30 controls the control unit 30 at a predetermined timing, such as when a certain period of time has elapsed since the previous process, or when an instruction is given by a user who operates the server 20, as shown in FIG. The repair determination process shown in the flowchart is started.

Note that in the flowchart of FIG. 6, the same step numbers as in FIG. 4 are used for parts that perform the same processing as the flowchart of FIG. 4 described in the first embodiment. Therefore, in the following, the processing contents of step numbers different from those in FIG. 4 will be mainly explained, and the explanation of common processing will be omitted unless it is particularly necessary.

In this embodiment, the control unit 30 reads vehicle information for the target section from the vehicle information database 41 in step S230, and then executes the process in step S231. In step S231, the control unit 30 uses the deterioration degree calculation unit 32 to correct the vehicle information read out in step S230. Here, the tilt/vibration information in the vehicle information is corrected based on the above-mentioned vehicle type information included in the vehicle information.

Specifically, for example, different correction coefficients are set in advance for each vehicle type, and in each vehicle information acquired in step S230, the correction coefficient corresponding to the vehicle type represented by the vehicle type information is applied to the tilt or vibration represented by the tilt/vibration information. Multiply by the magnitude of . Thereby, each vehicle information in the target section can be corrected in consideration of the vehicle type of the vehicle that detected each vehicle information. As a result, the degree of road deterioration can be calculated more accurately by eliminating the influence of vehicle type from the magnitude of tilt and sway expressed by each vehicle information.

After the vehicle information is corrected in step S231, in the subsequent step S240, the control unit 30 causes the deterioration degree calculation unit 32 to calculate the information when the vehicle 1 travels through the target section based on the vehicle information corrected in step S231. The degree of shaking and inclination of the vehicle 1 is calculated for each fixed distance. Here, based on the tilt/vibration information included in each vehicle information after correction, similar to the first embodiment, the magnitude of the tilt or vibration that occurs in the vehicle 1 when the vehicle 1 travels a certain distance is calculated. calculate.

Note that from step S240 onward, the same processes as in the flowchart of FIG. 4 described in the first embodiment are performed.

According to the second embodiment of the present invention described above, the vehicle information includes position information representing the travel point of the vehicle 1, tilt/vibration information representing at least one of the tilt and vibration of the vehicle 1 at the travel point, and vehicle type information indicating the type of vehicle 1. The deterioration degree calculation unit 32 corrects the tilt/vibration information using a different correction coefficient for each vehicle type of the vehicle 1 based on the vehicle type information (step S231), and corrects the slope/vibration information based on the position information and the corrected tilt/vibration information. The degree of deterioration is calculated (steps S240 to S250). By doing this, it is possible to eliminate the influence of the vehicle type from the magnitude of inclination and shaking expressed by the inclination/vibration information in the vehicle information, and to more accurately calculate the degree of road deterioration.

Note that the present invention is not limited to the above-described embodiments and modified examples, and can be implemented using arbitrary constituent elements within the scope of the invention. Moreover, it is also possible to implement the embodiments and modifications in any combination.

The embodiments and modifications described above are merely examples, and the present invention is not limited to these unless the characteristics of the invention are impaired. Furthermore, although various embodiments and modifications have been described above, the present invention is not limited to these. Other embodiments considered within the technical spirit of the present invention are also included within the scope of the present invention.

1: Vehicle, 2: Work vehicle, 10: Head unit, 11: Data acquisition section, 12: External communication section, 20: Server, 30: Control section, 31: Vehicle information acquisition section, 32: Deterioration degree calculation section, 33 : Repair determination section, 34: Repair plan creation section, 35: Repair plan transmission section, 40: Storage section, 41: Vehicle information database, 42: Road surface information database, 100: Road surface monitoring system

The road surface monitoring system according to the present invention includes a vehicle information acquisition unit that acquires vehicle information from the vehicle according to the road surface condition when the vehicle travels on the road, and a deterioration unit that calculates the degree of deterioration of the road based on the vehicle information. a degree calculation section; a repair determination section that determines whether or not the road needs to be repaired based on the degree of deterioration calculated by the deterioration degree calculation section; a repair plan creation unit that creates a repair plan for a repair location, and the repair plan creation unit obtains and obtains congestion levels according to the current road surface condition of the road at a plurality of repair locations. Based on the traffic congestion degree, a priority order of repair is determined for each of the plurality of repair-required locations, and the repair plan is created based on the priority order.

Claims (7)

a vehicle information acquisition unit that acquires vehicle information from the vehicle according to the road surface condition when the vehicle travels on the road;
a deterioration degree calculation unit that calculates the degree of deterioration of the road based on the vehicle information,
The vehicle information is information detected in the vehicle without measuring the distance from the vehicle to the road surface. The road surface monitoring system according to claim 1,
The vehicle information acquisition unit is a road surface monitoring system that acquires the vehicle information based on acceleration information detected by an acceleration sensor built in the vehicle or an information device installed in the vehicle. The road surface monitoring system according to claim 1 or 2,
The vehicle information acquisition unit acquires the vehicle information from each of the plurality of vehicles that have traveled on the road,
The degree of deterioration calculation unit is a road surface monitoring system that calculates the degree of deterioration of the road based on the vehicle information acquired from each of the plurality of vehicles. The road surface monitoring system according to claim 3,
The vehicle information includes position information representing a travel point of the vehicle, tilt/vibration information representing at least one of tilt and vibration of the vehicle at the travel point, and vehicle type information representing a vehicle type of the vehicle,
The deterioration degree calculation unit corrects the tilt/vibration information using a different correction coefficient for each vehicle model based on the vehicle type information, and corrects the tilt/vibration information based on the position information and the corrected tilt/vibration information. A road surface monitoring system that calculates the degree of road deterioration. The road surface monitoring system according to claim 1 or 2,
a repair determination unit that determines whether or not the road needs to be repaired based on the degree of deterioration calculated by the degree of deterioration calculation unit;
A road surface monitoring system comprising: a repair plan creation unit that creates a repair plan for a repair-required portion of the road determined to be in need of repair by the repair determination unit. The road surface monitoring system according to claim 5,
The repair plan creation unit is a road surface monitoring system that determines a priority order of repair for each of the plurality of repair-requiring locations, and creates the repair plan based on the priority order. The road surface monitoring system according to claim 6,
The repair plan creation unit determines the priority order based on at least one of the geographical relationship between the plurality of repair points and the degree of traffic congestion on the road at the plurality of repair points. Monitoring system.

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