In-vehicle abnormal sound detection and evaluation system and detection method

Abstract

The invention discloses an in-vehicle abnormal sound detection and evaluation system, and the system comprises: a plurality of noise signal collection modules which are respectively disposed in a plurality of regions in a vehicle, and are used for the collection of in-vehicle noise signals; a signal noise reduction module which is connected with the noise signal acquisition module and is used for denoising the noise signal to form a denoised signal; an abnormal sound analysis module which is connected with the signal noise reduction module and is used for obtaining various characteristic parameters in the denoised signal; a memory, wherein an abnormal sound feature information base is stored in the memory, and the memory is connected with the abnormal sound analysis module and used for comparing the abnormal sound feature information with the various feature parameters; and a processor, wherein the processor is connected with the memory and is used for determining the abnormal sound evaluation grade of the noise signal. The invention further discloses a method for detecting the abnormal sound in the vehicle, the denoising signal after reconstruction and noise reduction is obtained after the collected noise signal is denoised, the influence of interference factors is eliminated, and the accuracy of abnormal sound detection is improved.

Description

technical field [0001] The invention relates to the technical field of automobile vibration and noise, and more specifically, the invention relates to a detection and evaluation system and detection method for abnormal noise inside a vehicle. Background technique [0002] With the improvement of automobile performance, drivers and passengers have higher and higher requirements for the ride comfort of the vehicle. With the widespread application of pure electric vehicles, the noise level inside the car has been greatly reduced, and the problem of abnormal noise inside the vehicle has become particularly prominent inside the cabin. The problem of abnormal noise is closely related to the safety of the vehicle, and many abnormal noises indicate the abnormality of some parts in the vehicle. In order to evaluate and detect the abnormal noise problem, the traditional method of finding and solving the problem still relies heavily on the subjective judgment of the engineer at this s...

AI Technical Summary

Problems solved by technology

However, there are many noise interference factors in the car, the sound source location is difficult and subjectivity, and the noise data is difficult to generate visual text for quantitative description

At present, there is no reliable method for objectively evaluating and detecting abnormal noise, so a system that can objectively detect and evaluate the noise inside the car is needed

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