JP6915496B2 - Road condition confirmation device, road condition confirmation system and road condition confirmation program - Google Patents

Description

The present invention relates to a road condition confirmation device, a road condition confirmation system, and a road condition confirmation program.

The condition of the road may be checked for judgment such as road repair. In order to check the condition of the road, for example, there is a method of mounting a means for measuring the condition of the road surface on the vehicle and measuring the condition of the road when the vehicle travels on the road (see, for example, Patent Document 1). ..

JP 2015-176540

However, in the method described in Patent Document 1, only the state of the road when the vehicle for measurement is traveling can be confirmed, and the state of the road cannot be confirmed in real time when the vehicle is not traveling.

The present invention has been made in view of the above points, and is a road condition confirmation device and a road condition confirmation system capable of confirming road vibration even when a vehicle equipped with a means for measuring the condition of the road surface is not running. And to provide a road condition confirmation program.

The road condition confirmation device according to the present invention is mounted on a vehicle moving along the road and detects vibration during movement of the vehicle, and is installed on the road and continues vibration at the installed location. The acquisition unit that communicates with the fixed-point vibration detection unit that detects the vibration and acquires the information about the vibration detected by the in-vehicle device and the fixed-point vibration detection unit from each of the in-vehicle device and the fixed-point vibration detection unit, and the vibration acquired by the acquisition unit. Based on the information related to It has a complementary unit and a complementary unit.

The road condition confirmation device further has an estimation unit that estimates the fluctuation of the vibration of the non-installed portion complemented by the complement unit based on the vibration continuously detected by the fixed point vibration detection unit.

The road condition confirmation device further includes a warning generation unit that generates a warning when the maximum amplitude of the vibration becomes equal to or higher than a predetermined threshold value based on the vibration fluctuation of the non-installed portion estimated by the estimation unit.

The road condition confirmation device further includes a display unit that displays a map to which information on vibration detected by the fixed point vibration detection unit and vibration complemented by the complementary unit is mapped.

The road condition confirmation system according to the present invention is mounted on a vehicle moving along the road and detects vibration during movement of the vehicle, and is installed on the road and continuously vibrates at the installed location. Based on the acquisition unit that acquires the information about the vibration detected by the fixed-point vibration detection unit and the in-vehicle device and the fixed-point vibration detection unit to be detected from each of the in-vehicle device and the fixed-point vibration detection unit, and the information about the vibration acquired by the acquisition unit. A complementary part that complements the vibration when a vehicle without an in-vehicle device travels in a place on the road where the in-vehicle device detects vibration but is not installed on the road where a fixed-point vibration detection unit is not installed. And have.

The road condition confirmation program according to the present invention has a movement detection process that detects vibrations while moving along the road, and fixed points that are installed at a plurality of locations on the road and continuously detect vibrations at the installed locations. At a location on the road where vibration was detected in the movement detection process based on the acquisition process that acquires information on the vibration detected in the detection process, the movement detection process, and the fixed point detection process, and the information on the vibration acquired in the acquisition process. Therefore, the computer is made to execute a complementary step of complementing the vibration when it is not detected in the movement detection step at a place on the road where the vibration is not detected in the fixed point detection step.

According to the road condition confirmation device of the present invention, when the on-board unit does not detect the vibration in the non-installed place where the fixed-point vibration detection unit is not installed, based on the information on the vibration acquired from the on-board unit and the fixed-point vibration detection unit. Complements vibration. Therefore, even when the vehicle equipped with the on-board unit is not running, the vibration can be grasped as if the fixed point vibration detection unit is installed at the non-installed location.

It is a figure which shows the schematic structure of the road condition confirmation system which concerns on this embodiment. It is a block diagram which shows the hardware composition of a vehicle. It is a block diagram which shows the hardware structure of the fixed point vibration detection part. It is a block diagram which shows the hardware configuration of the state check apparatus. It is a block diagram which shows the functional structure of the state confirmation apparatus. It is a flowchart which shows the flow of the road condition confirmation processing of this embodiment. It is a conceptual diagram which shows how to supplement the vibration of a non-installation place.

Hereinafter, an example of the embodiment of the present invention will be described with reference to the drawings. The same reference numerals are given to the same or equivalent components and parts in each drawing. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios.

FIG. 1 is a diagram showing a schematic configuration of a road condition confirmation system according to the present embodiment.

As shown in FIG. 1, the road condition confirmation system 1 is a system for confirming the condition of the road 2, and is an in-vehicle device 10 mounted on the vehicle 3, a plurality of fixed-point vibration detection units 20, and a road condition confirmation device 30. Has.

The on-board unit 10 is mounted on a vehicle 3 moving along the road 2 and detects vibration during the movement of the vehicle 3. The vehicle-mounted device 10 has, for example, a vibration sensor and detects its own vibration during traveling. Since the vehicle 3 is traveling, the on-board unit 10 detects vibrations at different positions on the road 2. The detected vibration is transmitted to the road condition confirmation device 30 as information on the vibration.

The fixed-point vibration detection unit 20 is installed at a plurality of locations on the road 2 and continuously detects vibrations at the installed locations. The fixed-point vibration detection unit 20 includes, for example, a vibration sensor embedded in the road 2 and detects vibration when the vehicle 3 and other general vehicles travel on the road 2. Since each of the fixed point vibration detection units 20 is installed at one location on the road, vibration at the same position is continuously detected. The detected vibration is continuously transmitted to the road condition confirmation device 30 as information on the vibration. In FIG. 1, three fixed-point vibration detection units 20A to 20C are illustrated as the fixed-point vibration detection unit 20. However, FIG. 1 is merely an example, and only one fixed point vibration detection unit 20 may be installed on the road 2, or two or more fixed point vibration detection units 20 may be installed. The fixed-point vibration detection unit 20 can detect vibration caused by the running of another general vehicle not only when the vehicle 3 is traveling on the road 2 but also when the vehicle 3 is not traveling.

The road condition confirmation device 30 receives information on vibration from the vehicle-mounted device 10 and the fixed point vibration detection unit 20, and confirms deterioration of each part of the road 2.

Next, an example of the hardware configuration of the vehicle-mounted device 10, the fixed-point vibration detection unit 20, and the road condition confirmation device 30 will be described.

FIG. 2 is a block diagram showing a hardware configuration of the on-board unit.

As shown in FIG. 2, the in-vehicle device 10 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a storage 14, a communication interface 15, a vibration sensor 16, and a GPS (Global). It has a Positioning System) receiver 17. Each configuration is communicatively connected to each other via a bus.

The CPU 11 is a central arithmetic processing unit that executes various programs and controls each part. The program is read from the ROM 12 or the storage 14, and the program is executed using the RAM 13 as a work area. According to the programs recorded in the ROM 12 and the storage 14, each configuration is controlled and various arithmetic processes are performed.

The ROM 12 stores various programs and various data.

The RAM 13 temporarily stores programs and data as a work area.

The storage 14 is composed of an HDD (Hard Disk Drive) and an SSD (Solid State Drive), and stores various programs including an operating system and various data.

The communication interface 15 is an interface for communicating with other devices such as the road condition confirmation device 30, and is a standard such as Ethernet (registered trademark), FDDI (Fiber Distributed Data interface), Wi-Fi (registered trademark), and the like. Is used.

The vibration sensor 16 is a sensor that detects the vibration of the moving vehicle 3. In the present embodiment, as long as the vibration can be detected, an acceleration sensor may be used instead of the vibration sensor 16. When an accelerometer is used, the vertical component of the detected displacement can be extracted as vibration. The vibration detected by the vibration sensor 16 is converted into a signal and transmitted to the road condition confirmation device 30 via the communication interface 15.

The GPS receiver 17 receives a signal based on the GPS method from the satellite, and identifies the position of the vehicle-mounted device 10 (vehicle 3) from the arrival time difference of the signal. Further, the GPS receiver 17 can accurately confirm the current time by receiving the signal from the satellite. The position of the vehicle-mounted device 10 identified by the GPS receiver 17 is associated with the current time, converted into a signal, and transmitted to the road condition confirmation device 30.

FIG. 3 is a block diagram showing a hardware configuration of the fixed point vibration detection unit.

As shown in FIG. 3, the fixed point vibration detection unit 20 includes a CPU 21, a communication interface 22, a vibration sensor 23, and a clock 24. Each configuration is communicatively connected to each other via a bus. As described above, the fixed point vibration detection unit 20 is buried in the road 2.

The CPU 21 controls each of the above configurations and performs various arithmetic processes.

The communication interface 22 is an interface for communicating with other devices such as the road condition confirmation device 30, and for example, standards such as Ethernet (registered trademark), FDDI, and Wi-Fi (registered trademark) are used.

The vibration sensor 23 is a sensor that detects vibration in the same manner as the vibration sensor 16 of the vehicle-mounted device 10. However, since the vibration sensor 23 is embedded in the road 2, its position does not change, and the vibration at the same location on the road is detected at a fixed point. The vibration detected by the vibration sensor 23 is converted into a signal and transmitted to the road condition confirmation device 30 via the communication interface 22.

The clock 24 identifies the current time. A GPS receiver may be used instead of the clock 24. The current time can also be specified by the GPS receiver. The time specified by the clock 24 is associated with the vibration signal detected by the vibration sensor 23 and transmitted to the road condition confirmation device 30.

FIG. 4 is a block diagram showing a hardware configuration of the road condition confirmation device.

As shown in FIG. 4, the road condition confirmation device 30 includes a CPU 31, a ROM 32, a RAM 33, a storage 34, an operation unit 35, a display unit 36, and a communication interface 37.

The CPU 31 is a central arithmetic processing unit that executes various programs and controls each unit. The program is read from the ROM 32 or the storage 34, and the program is executed using the RAM 33 as a work area. According to the programs recorded in the ROM 32 and the storage 34, the control of each of the above configurations and various arithmetic processes are performed.

The ROM 32 stores various programs and various data.

The RAM 33 temporarily stores programs and data as a work area.

The storage 34 is composed of HDDs and SSDs, and stores various programs including an operating system and various data. The storage 34 stores a road condition confirmation program for confirming the condition of the road. The road condition confirmation program may be stored in the ROM 32.

The operation unit 35 includes a pointing device such as a mouse and a keyboard, and is used for performing various inputs.

The display unit 36 is, for example, a liquid crystal display and displays various types of information. The display unit 36 may adopt a touch panel method and function as an operation unit 35.

The communication interface 37 is an interface for communicating with other devices such as the on-board unit 10 and the fixed point vibration detection unit 20, and is used by standards such as Ethernet (registered trademark), FDDI, and Wi-Fi (registered trademark). Be done.

Next, an example of the functional configuration of the road condition confirmation device 30 will be described.

FIG. 5 is a block diagram showing a functional configuration of the road condition confirmation device.

As shown in FIG. 5, the road condition confirmation device 30 has an acquisition unit 301, a complement unit 302, a guess unit 303, a warning generation unit 304, and a map generation unit 305 as functional configurations. Each configuration is realized by the CPU 31 reading and executing the road condition confirmation program stored in the ROM 32 or the storage 34.

The acquisition unit 301 acquires information on the vibration detected by the on-board unit 10 and the fixed-point vibration detection unit 20 from each of the on-board unit 10 and the fixed-point vibration detection unit 20. As described above, the information on vibration is also associated with information on the place and time when the vibration was measured.

The complementary unit 302 is a location on the road 2 where the on-board unit 10 has detected vibration based on the vibration information acquired by the acquisition unit 301, and is a location on the road 2 where the fixed point vibration detection unit 20 is not installed. In the above, the vibration when a vehicle on which the on-board unit 10 is not installed (a vehicle on which the on-board unit is not installed) travels is complemented. Hereinafter, the location on the road 2 where the on-board unit 10 detects vibration and the location on the road 2 where the fixed point vibration detection unit 20 is not installed is referred to as a non-installation location. The complementing unit 302 complements, for example, the vibration of the non-installed portion as a waveform. The specific operation of the complementary unit 302 will be described later.

The estimation unit 303 estimates the fluctuation of the vibration obtained by complementing with the complement unit 302 based on the vibration detected by the fixed point vibration detection unit 20. For example, the estimation unit 303 extracts parameters from the vibration detected by the fixed point vibration detection unit 20, and based on the temporal fluctuation of the extracted vibration parameters, the estimation unit 303 complements the vibrations obtained by the complementary unit 302 over time. Guess the fluctuation. Vibration parameters are, for example, maximum amplitude or wavelength. The guessing unit 303 identifies fluctuations in vibration parameters at the location where the fixed-point vibration detection unit 20 is installed based on the detection of the current vibration by the fixed-point vibration detection unit 20, and the continuous unit 302 complemented in the past. Estimate how the maximum amplitude of a typical vibration now fluctuates. Further, the guessing unit 303 identifies how the maximum amplitude of the vibration fluctuates at the place where the fixed point vibration detecting unit 20 is installed, the tendency of the fluctuation of the maximum amplitude, and is continuously complemented by the complementing unit 302 in the past. Estimate how the maximum amplitude of a typical vibration will fluctuate in the future.

The warning generation unit 304 generates a warning when the maximum amplitude of the vibration becomes equal to or more than a predetermined threshold value based on the information regarding the vibration acquired by the acquisition unit 301. The warning is displayed on the display unit 36, for example, as a character prompting the warning. The warning generation unit 304 generates a warning when the maximum amplitude of the continuous vibration complemented by the complement unit 302 is equal to or greater than a predetermined threshold value. Further, the warning generation unit 304 determines the time when the maximum amplitude of the continuous vibration estimated by the estimation unit 303 becomes equal to or more than a predetermined threshold value, and generates a warning regarding the time point when the maximum amplitude becomes equal to or more than the threshold value. The warning regarding the time point when the threshold value is exceeded is a warning for notifying the user in advance of the time point when the threshold value or more is reached, or a warning for notifying the user when the time point when the threshold value or more is reached.

The map generation unit 305 generates a map that maps information on the vibration detected by the fixed point vibration detection unit 20 and the vibration complemented by the complement unit 302. The map generated by the map generation unit 305 can be displayed on the display unit 36. The information about vibration is, for example, the maximum amplitude value of vibration. In this case, the map shows the maximum amplitude values at various points on the road 2.

Next, an example of the operation of the road condition confirmation device 30 will be described.

FIG. 6 is a flowchart showing the flow of the road condition confirmation process of the present embodiment. The road condition confirmation process is realized by the CPU 31 reading and executing the road condition confirmation program stored in the ROM 32 or the storage 34.

The CPU 31 acquires information on vibration from the vehicle-mounted device 10 (step S101). Information on vibration may be acquired from the moving vehicle-mounted device 10 at any time, or may be collectively acquired from the vehicle-mounted device 10 when the measurement by the vehicle-mounted device 10 is completed. In the following, information on vibration acquired from the vehicle-mounted device 10 will be referred to as vehicle vibration information.

The CPU 31 acquires information related to vibration from the fixed point vibration detection unit 20 (step S102). In the flowchart, the CPU 31 receives information about vibration from the fixed point vibration detection unit 20 after receiving information about vibration from the vehicle-mounted device 10, but is not limited to this. Since the fixed point vibration detection unit 20 measures the vibration at any time, the CPU 31 can receive information about the vibration at any time. Hereinafter, the information related to the vibration acquired from the fixed point vibration detection unit 20 is referred to as fixed point vibration information.

The CPU 31 complements continuous vibration (waveform) at a non-installed location on the road 2 where the fixed-point vibration detection unit 20 is not installed (step S103). The non-installation location is, for example, a location located between the installation locations of the plurality of fixed-point vibration detection units 20 or a location outside the installation range of the fixed-point vibration detection unit 20. Complementing the vibration of the non-installed portion will be described later with reference to the specific example of FIG. In the following, the supplemented information on vibration at the non-installed location will be referred to as non-installed vibration information.

The CPU 31 extracts the maximum amplitude as a vibration parameter based on the vehicle vibration information, the fixed point vibration information, and the non-installed vibration information, and determines whether or not there is a location on the road 2 where the maximum amplitude is equal to or greater than the threshold value (step S104). ). The threshold value is a value that can be arbitrarily set by the user. The threshold is set, for example, equivalent to the value of the maximum amplitude when measuring the vibration of the road in need of repair. Alternatively, the threshold value may be set to be equivalent to the value of the maximum amplitude when measuring the vibration of the road in front of which repair is required.

If there is no location where the maximum amplitude of vibration is equal to or greater than the threshold value (step S104: NO), the CPU 31 proceeds to the process of step S106. When there is a portion where the maximum amplitude of vibration is equal to or greater than the threshold value (step S104: YES), the CPU 31 generates a warning that the relevant portion needs to be repaired or re-inspected (step S105).

The CPU 31 generates a map by mapping information on vibration to a location where vibration is detected and complemented on a map representing road 2 based on vehicle vibration information, fixed point vibration information, and non-installed vibration information (step). S106). The CPU 31 causes the display unit 36 to display the generated map (step S107).

Steps S101 to S107 are flows that complement the vibration of the non-installed portion based on the vehicle vibration information and the fixed point vibration information. After supplementing the vibration at the non-installed location, the vibration measurement by the fixed point vibration detection unit 20 can be continued without measuring the vibration by the on-board unit 10. If the latest vibration measurement by the fixed point vibration detection unit 20 is continued, the vibration detected by the vehicle-mounted device 10 becomes relatively old. Therefore, how the vibration complemented in step S103 has fluctuated up to now by using the fluctuation of the fixed point vibration information continuously acquired from the fixed point vibration detection unit 20 without using the detection result of the on-board unit 10. It is possible to guess (update). Further, it is also conceivable to estimate (update) how the vibration complemented in step S103 will fluctuate in the future by using the fluctuation of the fixed point vibration information continuously acquired from the fixed point vibration detection unit 20. In steps S108 to S110, a flow of estimating the fluctuation of the vibration of the non-installed portion is shown.

The CPU 31 determines whether or not there is an instruction to estimate (update) the fluctuation of the vibration of the non-installed portion at present or in the future, that is, the fluctuation of the non-installed vibration information supplemented in step S103 (step S108). The CPU 31 displays, for example, a screen on the display unit 36 that accepts the estimation of the vibration of the non-installed portion, and receives an instruction from the user. Here, the CPU 31 may accept the time point (current or future) at which the vibration of the non-installed portion is estimated. The CPU 31 may cause the display unit 36 to input an arbitrary time point such as present, n days later, n years later (n is an integer), and the like.

When the user does not receive an instruction regarding the estimation of the vibration of the non-installed portion (step S108: NO), the CPU 31 ends the road condition confirmation process. Since the estimation of the vibration of the non-installed portion may be accepted at any time, the CPU 31 may wait until there is an instruction from the user without ending the road condition confirmation process.

When an instruction is received from the user regarding the estimation of the vibration of the non-installed portion (step S108: YES), the CPU 31 acquires the fixed point vibration information from the fixed point vibration detection unit 20 (step S109). The fixed-point vibration information acquired here is the fixed-point vibration information since the previous acquisition. Note that the CPU 31 may omit step S109 and continuously receive the fixed point vibration information from the fixed point vibration detection unit 20 even if there is no particular instruction.

The CPU 31 calculates the tendency of the vibration fluctuation detected by the fixed point vibration detection unit 20 from the acquired fixed point vibration information, reflects the fluctuation tendency in the non-installed vibration information, and reflects the tendency of the fluctuation in the non-installed vibration information at present or in the future. Estimate the vibration (step S110).

The CPU 31 returns to the process of step S104, and determines whether the maximum amplitude is equal to or greater than the threshold value based on the fixed point vibration information acquired in step S109 and the non-installed vibration information estimated in step S110. Then, the CPU 31 generates a warning to that effect when the current vibration is equal to or higher than the threshold value, and when the future vibration is equal to or higher than the threshold value, the CPU 31 determines that the vibration will exceed the threshold value in the future and the time when the threshold value will be exceeded. Generate a warning that contains.

With reference to FIG. 7, specific examples of “complementing the vibration of the non-installed portion” in step S103 of FIG. 6 and “estimating the vibration of the non-installed portion” in step S110 will be described.

FIG. 7 is a conceptual diagram showing how the vibration of the non-installed portion is complemented.

The upper part of FIG. 7 shows a state in which the vehicle 3 travels on the road 2. In the lower part of FIG. 7, the vibration detected by the fixed point vibration detection unit 20 (20A to 20C) is shown by a thick line. In the lower part of FIG. 7, the horizontal axis X indicates the position, the T axis extending from the back to the front indicates time, and the vertical axis Z indicates the amplitude of vibration. Since the vehicle 3 is moving with the passage of time, the vibration detected by the vehicle-mounted device 10 changes the position X as the time T advances, and as a result, as shown by the dotted arrow, the X axis in the XT plane. It is shown as a waveform that is inclined with respect to both the T-axis and the T-axis.

Further, the vibration detected by the fixed point vibration detection units 20A, 20B and 20C is shown as a waveform parallel to the T axis because the position does not change. The vibration waveforms detected by the fixed-point vibration detection units 20A, 20B and 20C have the same amplitude as the vibration detected by the vehicle-mounted device 10 when the vehicle 3 passes over the fixed-point vibration detection units 20A, 20B and 20C, respectively. ..

In the following, an example of complementing the vibration will be described with the position D between the fixed point vibration detection unit 20B and the fixed point vibration detection unit 20C as a non-installation location. In the following, for convenience, the position A in the X-axis direction where the fixed-point vibration detection unit 20A is installed is the position A, the position in the X-axis direction where the fixed-point vibration detection unit 20B is installed is the position B, and the fixed-point vibration detection unit 20C is installed. The position in the X-axis direction is defined as position C.

First, the CPU 31 of the road condition confirmation device 30 extracts the maximum amplitude Rr and the vibration natural frequency Fr from the vibration waveform detected by the fixed point vibration detection unit 20B. Further, the CPU 31 extracts the vibration amplitude value Rvb detected by the vibration sensor 16 when the vehicle 3 travels on the fixed point vibration detection unit 20B from the vehicle vibration information. Further, the CPU 31 extracts the vibration amplitude value Rvd detected by the vibration sensor 16 of the vehicle-mounted device 10 at the position D where the fixed point vibration detection unit 20 is not installed.

Then, the CPU 31 estimates the maximum amplitude Rp at the position D by the following equation (1).

Rp = Rr × Rvd / Rvb ... Equation (1)

The waveform is estimated by applying the vibration natural frequency Fr to the maximum amplitude Rp estimated by the above equation (1).

In this way, even at the position D on the road 2 where the fixed point vibration detection unit 20 is not actually installed, the vibration waveform as shown by the alternate long and short dash line can be complemented.

Further, since the fixed point vibration detection unit 20 can constantly detect the vibration, for example, the vibration when a general vehicle other than the vehicle 3 travels can be estimated at the position D by using the detection result of the fixed point vibration detection unit 20. .. In FIG. 7, the fixed-point vibration detection unit 20 detects the amplitude Rpb of vibration caused by the running of a general vehicle. By substituting the amplitude Rpb into the Rr of the above equation (1), the amplitude Rpd when the same general vehicle passes at the position D can also be estimated.

In this way, the real-time vibration detection by the fixed-point vibration detection unit 20 can be reflected in the complemented waveform to estimate the vibration at the non-installed location.

Further, the CPU 31 monitors the tendency of vibration fluctuation detected by the fixed point vibration detection unit 20. For example, if the maximum amplitude of the vibration to be detected gradually increases, the gradient of the increase can be obtained and the value of the maximum amplitude in the future can be estimated. For the maximum amplitude of the above-supplemented vibration, the future maximum amplitude can be estimated by applying a similar gradient of increase. In this way, the vibration at position D can be estimated up to the value of the maximum amplitude in the future.

Alternatively, the CPU 31 calculates the number of times the general vehicle has traveled or the load that the general vehicle gives to the road 2 based on the vibration detected by the fixed point vibration detection unit 20, and the vibration at the position D is proportional to the calculated load. Can be estimated. In this case, the CPU 31 corrects the complemented vibration so that the maximum amplitude of the vibration at the position D increases as the number of times the general vehicle travels or the load accumulated by the general vehicle travels increases.

A case where the detection result of the fixed point vibration detection unit 20B installed at the nearest position B is used to supplement the vibration at the position D has been described. However, the present invention is not limited to this, and the average value of the fixed point vibration detection units 20 (fixed point vibration detection units 20B and 20C in the example of FIG. 7) arranged around the position D or the average value according to the distance is used to determine the position D. Vibration may be complemented. For example, when the position C is twice as far as the position B with respect to the position D, the detection results of the fixed point vibration detection unit 20B are averaged with twice the weight of the fixed point vibration detection unit 20C, and the position D is used. Vibration can be complemented (estimated).

As described above, according to the road condition confirmation system 1 of the present embodiment, based on the vibration information acquired from the on-board unit 10 and the fixed point vibration detection unit 20, in a non-installed place where the fixed point vibration detection unit 20 is not installed. , The vibration when the on-board unit 10 does not detect is complemented. Therefore, even when the vehicle 3 equipped with the on-board unit 10 is not running, the vibration can be grasped as if the fixed point vibration detection unit 20 is installed at the non-installed location.

Further, according to the road condition confirmation system 1, the fluctuation of the vibration of the non-installed portion is estimated based on the tendency (gradient of increase) of the amplitude of the vibration continuously detected by the fixed point vibration detection unit 20. Therefore, it is possible to continuously estimate the vibration of the non-installed portion where the fixed point vibration detection unit 20 is not installed without relying on the on-board unit 10. Based on the tendency of the vibration amplitude to fluctuate, the future vibration of the non-installed location can be estimated, so it is easy to make plans for re-inspection and repair.

Further, according to the road condition confirmation system 1, a warning is generated when the vibration of the complemented or estimated non-installed portion exceeds the threshold value. Therefore, it is possible to notify the user that the maximum amplitude of the vibration is increased and the road 2 is deteriorating not only in the place where the fixed point vibration detection unit 20 normally measures but also in the non-installed place. As described above, when the vibration of the non-installed portion in the future is estimated, the road condition confirmation system 1 can notify the user in advance of the deterioration of the road 2 in the future.

Further, according to the road condition confirmation system 1, not only the location where the fixed point vibration detection unit 20 is installed but also the vibration distribution of the non-installed location is mapped to the road map and displayed on the display unit 36. Therefore, the user can check the degree of deterioration of the entire road at a glance.

In the above embodiment, the fixed point vibration detection unit 20 is described by an example in which the fixed point vibration detection unit 20 is linearly arranged on the road 2 along the traveling direction, but the present invention is not limited to this. The fixed point vibration detection unit 20 can also be arranged in the width direction of the road 2. If the fixed-point vibration detection unit 20 is arranged in the traveling direction and the width direction of the road 2 and the vibration of the non-installed portion between the fixed-point vibration detection units 20 is complemented, the load applied to the road can be visually confirmed.

Various processors other than the CPU 31 may execute the road condition confirmation process executed by the CPU 31 by reading the software (program) in each of the above embodiments. In this case, the processor includes a PLD (Programmable Logic Device) whose circuit configuration can be changed after manufacturing an FPGA (Field-Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), and the like. An example is a dedicated electric circuit or the like, which is a processor having a circuit configuration designed exclusively for it. Further, the road condition confirmation process may be executed by one of these various processors, or a combination of two or more processors of the same type or different types (for example, a plurality of FPGAs, and a CPU and an FPGA). It may be executed by combination etc.). Further, the hardware structure of these various processors is, more specifically, an electric circuit in which circuit elements such as semiconductor elements are combined.

Further, in each of the above embodiments, the mode in which the road condition confirmation processing program is stored (installed) in the ROM 32 or the storage 34 in advance has been described, but the present invention is not limited to this. The program may be provided in a form recorded on a recording medium such as a CD-ROM (Compact Disk Read Only Memory), a DVD-ROM (Digital Versaille Disk Read Only Memory), and a USB (Universal Serial Bus) memory. Further, the program may be downloaded from an external device via a network.

1 Road condition confirmation system 2 Road 3 Vehicle 10 On-board unit 11, 21, 31 CPU
12, 32 ROM
13, 33 RAM
14, 34 Storage 15, 22, 37 Communication interface 16 Vibration sensor 17 GPS receiver 20, 20A to 20C Fixed point vibration detection unit 23 Vibration sensor 24 Clock 30 Road condition confirmation device 35 Operation unit 36 Display unit 301 Acquisition unit 302 Complementary unit 303 Guessing unit 304 Warning generation unit 305 Map generation unit

Claims (6)

An on-board unit that is mounted on a vehicle moving along the road and detects vibration during movement of the vehicle, and a fixed-point vibration detection unit that is installed on the road and continuously detects vibration at the installed location. An acquisition unit that communicates and acquires information on vibration detected by the on-board unit and the fixed-point vibration detection unit from each of the on-board unit and the fixed-point vibration detection unit.
Based on the vibration information acquired by the acquisition unit, the vehicle is mounted on the road where the vehicle-mounted device detects vibration and is not installed on the road where the fixed-point vibration detection unit is not installed. A complementary part that complements the vibration when a vehicle without an on-board unit is running,
Road condition confirmation device with. The road condition confirmation device according to claim 1, further comprising an estimation unit for estimating vibration fluctuations of the non-installed portion complemented by the complement unit based on the vibration continuously detected by the fixed point vibration detection unit. The road condition according to claim 2, further comprising a warning generation unit that generates a warning when the maximum amplitude of vibration becomes equal to or higher than a predetermined threshold value based on the vibration fluctuation of the non-installed portion estimated by the estimation unit. Confirmation device. The road condition confirmation device according to any one of claims 1 to 3, further comprising a display unit that displays a map to which information on vibration detected by the fixed point vibration detection unit and vibration complemented by the complementary unit is mapped. An on-board unit that is mounted on a vehicle moving along the road and detects vibration during the movement of the vehicle.
A fixed-point vibration detector that is installed on the road and continuously detects vibration at the installed location,
An acquisition unit that acquires information on vibration detected by the on-board unit and the fixed-point vibration detection unit from each of the on-board unit and the fixed-point vibration detection unit.
Based on the vibration information acquired by the acquisition unit, the vehicle is mounted on the road where the vehicle-mounted device detects vibration and is not installed on the road where the fixed-point vibration detection unit is not installed. A complementary part that complements the vibration when a vehicle without an on-board unit is running,
Road condition confirmation system with. A movement detection process that detects vibrations while moving along the road,
A fixed point detection process that is installed at a plurality of locations on the road and continuously detects vibrations at the installed locations.
The acquisition step of acquiring information on the vibration detected in the movement detection step and the fixed point detection step, and the acquisition step.
Based on the information on the vibration acquired in the acquisition step, the location on the road where the vibration was detected in the movement detection step but not detected in the fixed point detection step, said. In the movement detection process, a complementary process that complements the vibration when it is not detected, and
A road condition confirmation program that causes a computer to execute.

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