JP2022186917A - vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assess a state in a region where a vehicle stands still on a track.

SOLUTION: A communication device 40 installed in a vehicle 80 transmits, to an analysis device 10, audio data generated by a first audio data generating device 30 in association with position specifying information and information for specifying whether the vehicle 80 stands still. The analysis device 10 analyzes the audio data generated when the vehicle 80 stands still. The audio data to be analyzed includes sound obtained by engine sound of the vehicle 80 being reflected on the road surface. Therefore, by analyzing this audio data, it is possible to assess a state of a track at the stationary point.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to analysis devices, vehicles, analysis methods, programs, and storage media.

Deterioration of roads affects the movement of vehicles. For this reason, deteriorated running paths need to be repaired. Therefore, techniques for measuring the deterioration state of the road are being developed. For example, the technique described in Patent Literature 1 acquires the acceleration in the height direction of the vehicle and uses the peak information of the acceleration to evaluate the road surface condition of the road.

JP 2017-128979 A

In the method described in Patent Document 1, in order to evaluate the state of the roadway, the vehicle must travel on the roadway, so the state cannot be evaluated for the region of the roadway where the moving object was stationary. .

One example of the problem to be solved by the present invention is to be able to evaluate the state of a region of the road where the vehicle was stationary.

The present disclosure includes audio data including an engine sound of a vehicle running on a road when the vehicle is stationary, and position specifying information for identifying the position of the vehicle when the audio data is generated. an acquisition unit that acquires and
a processing unit that analyzes the voice data to generate state data indicating the road surface state of the road at the position specified by the position specifying information;
is included.

The invention according to the present disclosure provides an engine,
an audio data generator arranged at a position facing the road surface;
a soundproof member or sound absorbing member arranged on the engine-side surface of the sound data generating device;
an output unit that outputs the audio data generated by the audio data generation device to an analysis device;
It is a vehicle with

The present disclosure provides that the computer
Acquiring audio data including an engine sound of a vehicle running on a road when the vehicle is stationary and position specifying information for specifying the position of the vehicle when the audio data is generated;
An analysis method is included for generating condition data indicating the condition of the road surface at the location identified by the location identification information by analyzing the audio data.

The present disclosure provides a computer-executable program comprising:
Acquisition of audio data including the engine sound of a vehicle running on a road when the vehicle is stationary, and position specifying information for specifying the position of the vehicle when the audio data was generated. When,
a process of generating state data indicating the road surface state of the road at the position specified by the position specifying information by analyzing the voice data;
contains a program that runs

The present disclosure includes a storage medium storing the above program.

It is a figure for demonstrating the usage environment of the analysis apparatus which concerns on 1st Embodiment. It is a figure showing an example of functional composition of an analysis device. It is a figure which shows an example of the hardware constitutions of an analysis apparatus. It is a figure for demonstrating an example of arrangement|positioning of the 1st audio|voice data production|generation apparatus in a vehicle. It is a figure which shows the structure of the vehicle which concerns on 2nd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in all the drawings, the same constituent elements are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

(First embodiment)
FIG. 1 is a diagram for explaining the usage environment of an analysis device 10 according to the first embodiment. The analysis device 10 is a device that determines the state of the road by analyzing voice data. The analysis result of the analysis device 10 is stored in the storage unit 20 .

The audio data to be analyzed is generated by the first audio data generation device 30 mounted on the vehicle 80 . Vehicle 80 is an automobile or a two-wheeled motor vehicle, and has communication device 40 . The first sound data generating device 30 is arranged at a position where the engine sound of the vehicle 80 reflected on the road surface (hereinafter referred to as engine reflected sound) can be obtained. The audio data generated by the first audio data generating device 30 is linked to information specifying the position where the audio data was generated (hereinafter referred to as position specifying information), and is sent to the analysis device 10 via the communication device 40. sent.

At this time, the communication device 40 further associates the audio data with information for identifying whether the vehicle 80 was stationary when the audio data was generated, and transmits the information to the analysis device 10 . This information may be information directly indicating whether or not the vehicle 80 was stationary, or may be the position specifying information described above. In the latter case, if there is no change in the position indicated by the position specifying information, it can be determined that the vehicle 80 is stationary.

Here, the vehicle 80 being stationary refers to a state in which the engine of the vehicle 80 is running but the vehicle 80 is not moving. Also, the position specifying information is generated by, for example, the GPS information receiving device and the GPS information analyzing device mounted on the vehicle 80, but may be generated using other methods. The position specifying information may indicate not only the position in the extending direction of the roadway, but also the position in the width direction of the roadway or lane.

Then, the analysis device 10 processes audio data generated when the vehicle 80 is stationary. Specifically, the sound data includes the above-described engine reflected sound. The engine reflected sound reflects the condition of the road, for example, the condition of the road surface. Therefore, the analysis device 10 can generate data (hereinafter referred to as state data) indicating the state of the position where the vehicle 80 was stationary on the travel road by analyzing the engine reflected sound.

The analysis device 10 stores the audio data received from the communication device 40 in the storage unit 20 in association with the position specifying information. Here, the audio data and the position specifying information may be associated with each other using time information indicating the time when they were generated.

Note that the communication device 40 may link only the audio data generated when the vehicle 80 is stationary to the position specifying information and transmit it to the analysis device 10 . In this case, the analysis device 10 processes all audio data received from the communication device 40 .

FIG. 2 is a diagram showing an example of the functional configuration of the analysis device 10. As shown in FIG. The analysis device 10 has an acquisition unit 110 and a processing unit 120 .

The acquisition unit 110 acquires the above-described audio data and position specifying information from the storage unit 20 . By analyzing the voice data, the processing unit 120 determines the state of the road at the position where the voice data was generated. For example, the processing unit 120 stores in advance reference data, for example, feature amounts, which are used when analyzing the voice data for each road condition. Then, the processing unit 120 compares the audio data to be processed with reference data stored in advance, and determines the state of the road based on the reference data with the highest degree of matching. For example, the processing unit 120 determines the state corresponding to the reference data with the highest degree of matching as the road state. Then, the processing unit 120 causes the storage unit 20 to store the determination result in association with the position specifying information. Note that the position specifying information linked to the determination result may indicate not only the position in the extending direction of the roadway, but also the position in the width direction of the roadway or lane.

It is preferable that the reference data pre-stored in the processing unit 120 is determined for each vehicle type of the vehicle 80 . In this case, the communication device 40 transmits information for specifying the vehicle type of the vehicle 80 in which the communication device 40 is mounted to the analysis device 10 together with the voice data. The information specifying the vehicle type may be information directly indicating the vehicle type, or may be the automobile registration number of the vehicle 80 . The processing unit 120 then uses the transmitted information to read reference data used for analysis.

Furthermore, it is preferable that the reference data pre-stored in the processing unit 120 is determined for each engine speed. In this case, the analysis device 10 transmits to the analysis device 10 rotation speed data indicating the rotation speed of the engine together with the voice data. Then, the processing unit 120 reads the reference data corresponding to the transmitted rotational speed data. Note that the reference data stored in advance in the processing unit 120 may be determined for each vehicle type and each engine speed.

FIG. 3 is a diagram showing an example of the hardware configuration of the analysis device 10. As shown in FIG. A main configuration of the analysis device 10 is realized using an integrated circuit. The integrated circuit has a bus 402 , processor 404 , memory 406 , storage device 408 , input/output interface 410 and network interface 412 . The bus 402 is a data transmission path through which the processor 404, memory 406, storage device 408, input/output interface 410, and network interface 412 exchange data with each other. However, the method of connecting the processors 404 and the like to each other is not limited to bus connection. The processor 404 is an arithmetic processing device implemented using a microprocessor or the like. The memory 406 is a memory implemented using a RAM (Random Access Memory) or the like. The storage device 408 is a storage device implemented using a ROM (Read Only Memory), flash memory, or the like.

The input/output interface 410 is an interface for connecting the analysis apparatus 10 to peripheral devices such as the storage unit 20 . In this figure, an input/output interface 410 is an example of the acquisition unit 110 .

A network interface 412 is an interface for connecting the analysis device 10 to a communication network. A method for connecting the network interface 412 to the communication network may be a wireless connection or a wired connection.

The storage device 408 stores program modules for realizing each functional element of the analysis device 10 and reference data used when analyzing voice data. The processor 404 implements each function of the analysis device 10 by reading this program module into the memory 406 and executing it.

Note that the hardware configuration of the integrated circuit described above is not limited to the configuration shown in this figure. For example, program modules may be stored in memory 406 . In this case, the integrated circuit may not include storage device 408 .

FIG. 4 is a diagram for explaining an example of the arrangement of the first audio data generation device 30 in the vehicle 80. As shown in FIG. The vehicle 80 has an engine 82 and a soundproof member or sound absorbing member 84 in addition to the first audio data generation device 30 and the communication device 40 described above. The first voice data generation device 30 is arranged on the rear side of the vehicle 80, that is, at a position facing the road surface of the road. For example, the first audio data generation device 30 is arranged on the back side of the body. When viewed in the longitudinal direction of the vehicle 80 , the soundproof member or sound absorbing member 84 is arranged on the engine 82 side of the first audio data generation device 30 . For example, the soundproof member or sound absorbing member 84 may be attached to the surface of the engine 82 of the first audio data generation device 30, or may be arranged within 30 cm from the first audio data generation device 30. By providing the soundproof member or sound absorbing member 84 , it is possible to suppress the engine sound generated by the engine 82 from directly entering the first audio data generating device 30 .

In addition, in the longitudinal direction of the vehicle 80, that is, the front-rear direction, the engine 82, the center C of the vehicle 80, and the first voice data generation device 30 are arranged in this order. By doing so, it is possible to prevent the engine sound generated by the engine 82 from directly entering the first audio data generating device 30 . Note that the soundproof member or sound absorbing member 84 is positioned between the center C and the first audio data generation device 30 .

Furthermore, it is preferable that the distance from the engine 82 to the first audio data generation device 30 is 1 m or more. Even in this way, it is possible to prevent the engine sound generated by the engine 82 from directly entering the first audio data generating device 30 .

As described above, according to the present embodiment, the communication device 40 mounted on the vehicle 80 uses the audio data generated by the first audio data generating device 30 to identify the position specifying information and whether or not the vehicle 80 is stationary. It is transmitted to the analysis device 10 in association with the information for the purpose. The analysis device 10 analyzes audio data generated when the vehicle 80 is stationary. The sound data to be analyzed includes the engine sound of the vehicle 80 reflected on the road surface. Therefore, by analyzing this voice data, it is possible to determine the state of the road at that stationary point. Therefore, the condition can be evaluated for the area of the roadway where the vehicle 80 was stationary.

(Second embodiment)
FIG. 5 is a diagram showing the configuration of a vehicle 80 according to the second embodiment, and corresponds to FIG. 4 in the first embodiment. A vehicle 80 according to this embodiment has the same configuration as the vehicle 80 according to the first embodiment, except that it includes a second audio data generation device 32 . The audio data generated by the second audio data generating device 32 (hereinafter referred to as second audio data) is the audio data generated by the first audio data generating device 30 at the same timing (hereinafter referred to as first audio data). ) and transmitted to the analysis device 10 . This linking is performed, for example, via time data indicating the generation timing of each audio data. In this case, the first audio data and the second audio data are both linked to the time data and transmitted to the analysis device 10 . The analysis device 10 stores the received second audio data in the storage unit 20 in association with the first audio data.

Acquisition unit 110 of analysis device 10 reads the second audio data together with the first audio data from storage unit 20 . Then, the processing unit 120 generates state data using, for example, the first audio data and the second audio data generated at the same timing.

The second sound data generation device 32 is closer to the engine 82 and closer to the road surface than the first sound data generation device 30 is. The ratio of the sound directly input from the engine 82 to the sound included in the sound data (second sound data) generated by the second sound data generation device 32 is the sound data generated by the first sound data generation device 30. (first audio data). Therefore, the processing unit 120 calculates the difference between the first audio data and the second audio data, and uses this calculation result as an analysis target. In this way, the ratio of the sound directly input from the engine 82 is reduced in the data to be analyzed, that is, the noise is reduced, so the road surface condition can be analyzed with high accuracy.

Note that the processing unit 120 may calculate the difference between data obtained by multiplying one of the first audio data and the second audio data by a predetermined coefficient and the other data, and use this calculation result as an analysis target. The coefficients used here are determined, for example, for each vehicle type of the analysis device 10, and stored in the analysis device 10 in advance.

Although the embodiments and examples have been described above with reference to the drawings, these are examples of the present invention, and various configurations other than those described above can be adopted.

10 analysis device 20 storage unit 30 first audio data generation device 32 second audio data generation device 40 communication device 80 vehicle 82 engine 84 sound absorbing member 110 acquisition unit 120 processing unit

Claims (1)

engine and
an audio data generator arranged at a position facing the road surface;
a soundproof member or sound absorbing member arranged on the engine-side surface of the sound data generating device;
an output unit that outputs the audio data generated by the audio data generation device to an analysis device;
vehicle equipped with

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