JP-2026075221-A - Information processing device

Abstract

[Problem] The objective is to make it easier to visually identify which of the known possible abnormal sounds the sound being analyzed is most similar to. [Solution] The information processing device stores a database that associates information indicating the frequency band of a predetermined noise for each type of source of a predetermined noise, which is an abnormal sound that may be generated from a vehicle. Based on the database and audio data including sounds generated from a predetermined vehicle, the device maps the frequency band of one or more predetermined noises and the frequency band of candidate noises included in the audio data onto a graph in which frequency is assigned to at least one axis. [Selection Diagram] Figure 3

Inventors

• 植田 裕

Assignees

• トヨタ自動車株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (5)

1. An information processing device that provides information regarding abnormal noises generated from a vehicle, A storage unit that stores a database that associates information indicating the frequency band of a predetermined noise with each type of source of a predetermined noise that may be generated from the vehicle, Mapping the frequency bands of one or more of the predetermined noises included in the database and the frequency data obtained by converting audio data including sound generated from a predetermined vehicle into the frequency domain onto a graph in which frequency is assigned to at least one axis, A control unit that performs the following: An information processing device having
2. The control unit, In the graph, if a frequency band containing the frequency data with a volume level above a predetermined value overlaps with the frequency band of the predetermined noise, the corresponding region is highlighted compared to other regions. The information processing apparatus according to claim 1.
3. The multiple predetermined noises are noises whose frequency band changes according to the vehicle's travel speed. The database stores the relationship between the frequency bands of the multiple predetermined noises and the vehicle's travel speed. The information processing apparatus according to claim 1 or 2.
4. The aforementioned audio data is associated with the vehicle's speed. The control unit, The information indicating the frequency band of the predetermined noise shown in the graph is updated to information indicating the frequency band corresponding to the vehicle's travel speed. The information processing apparatus according to claim 3.
5. The control unit, Based on the vehicle's travel speed, the frequency band of the predetermined noise is calculated. The information processing apparatus according to claim 4.

Description

This disclosure relates to an abnormal sound analysis device. There is a technology that analyzes and displays abnormal noises emitted from a vehicle. In this regard, for example, Patent Document 1 discloses a vehicle inspection and display method that acquires sound data from a vehicle, identifies the type of component that is the sound source based on the calculated sound pressure characteristics and frequency characteristics of the sound data, determines whether the component sound is normal or abnormal, generates images of the sound data and frequency data, and displays the identified component, vehicle type, and the result of the normal/abnormal sound determination on a display. Japanese Patent Publication No. 2023-084834 A diagram showing an overview of the graph displayed by the server device according to the embodiment.A diagram illustrating the components of a server device according to this embodiment.A flowchart of the process performed by the server device according to the embodiment.A diagram showing a graph displayed by the server device according to the embodiment.A flowchart of the processes performed by the server device in the modified example.A diagram showing a graph displayed by the server device relating to the second modification. (overview) There has always been a need for technology to identify abnormal noises emanating from vehicles. In this regard, there is a technology that analyzes abnormal noises emitted from a vehicle under inspection, whether stationary or in motion, and displays the nature of the noise. For example, conventional abnormal noise analysis devices can analyze the frequency bands of abnormal noises contained in audio data collected from a moving vehicle and display the vehicle parts that may have been the source of the noise, along with the probability that they were actually the source. Specifically, conventional noise analysis devices acquire audio data from a moving vehicle using a sound pressure visualization device, identify the part of the vehicle where the noise is occurring, and estimate the component that is the source of the noise. At this time, the noise analysis device can display the name of the component that is the source of the noise and the probability that this component is the source of the noise. For example, the noise analysis device can output displays such as "Transmission gear noise 82%" and "Transmission oil pump 10%" as the estimated source of the noise. However, there is room for improvement in conventional display methods. For example, when a certain abnormal noise is occurring and there are multiple possible sources of that noise, there is a need to be able to see at a glance which source's frequency range is most likely to correspond to the abnormal noise. Conventional methods, which list and display the possible sources along with their probabilities, can cause the displayed sources and their probabilities to change if even a small change occurs in the predetermined conditions used to determine whether a source is relevant. This can result in the displayed sources and their probabilities being replaced by completely different sources and their probabilities, causing previously displayed sources to disappear entirely. In this case, it is difficult for the user to consistently grasp all possible sources. However, it is desirable for the user to be able to consistently grasp the possible sources at a glance, taking into account various driving conditions that change as the abnormal noise occurs. An information processing device relating to one aspect of this disclosure is: An information processing device that provides information about abnormal noises generated from a vehicle, comprising: a storage unit that stores a database associating information indicating the frequency band of a predetermined noise for each type of source of a predetermined noise that may be generated from the vehicle; and a control unit that performs the following: mapping the frequency bands of one or more predetermined noises included in the database and frequency data obtained by converting audio data including sounds generated from a predetermined vehicle into the frequency domain onto a graph in which frequency is assigned to at least one axis. Default noise refers to any abnormal noise that may occur from a vehicle. Default noise does not necessarily include only abnormal noises that actually occur, but encompasses all abnormal noises that could potentially occur. Frequency data is data obtained by converting audio data, including sounds generated from a specified vehicle, into the frequency domain. Frequency data can be obtained, for example, by performing a Fourier transform on the audio data. The sounds generated from the specified vehicle include, for example, noise generated from a moving vehicle. The control unit converts the sound generated from a designated vehicle into the frequency domain and maps the frequency band of the sound generated from th