Denoising method and device for brake system

A brake system and noise reduction technology, applied in transducer circuits, sensors, signal processing, etc., can solve the problems of reducing the frequency of brake noise, taking a long time, and not being able to completely avoid brake noise, etc. The effect of moving noise
CN105872908AInactive Publication Date: 2016-08-17BEIJING CHANGAN AUTOMOBILE ENG TECH RES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING CHANGAN AUTOMOBILE ENG TECH RES
Publication Date
2016-08-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a denoising method and device for a brake system. The denoising method for the brake system comprises steps as follows: acquiring noise signals; screening the noise signals, and obtaining a low-frequency brake noise signal; analyzing the low-frequency brake noise signal, and generating a denoising signal coherent with the low-frequency brake noise signal according to coherent wave coherent conditions; playing the denoising signal. According to the technical scheme, an active denoising technology is adopted, low-frequency brake noise can be effectively reduced in the principle of sound wave interference, and the noise optimizing period is short.
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Description

technical field

[0001] The invention relates to the field of noise reduction of an automobile braking system, in particular to a method and device for reducing noise of a braking system. Background technique

[0002] Common car noise mainly includes tire noise, road noise, wind noise, engine noise, brake noise, etc. Brake noise is a common noise when a car is braking. Braking noise often occurs in low-speed and low-temperature braking conditions, and the decibel ranges from 70 to 120 decibels, which can easily cause people to be irritable. Automobile brake noise control is a very important part of automobile technology. At present, the main method to solve the brake noise is to change the structure of the friction pair to reduce the frequency of noise occurrence. However, the method of structural improvement can only reduce the frequency of braking noise, but cannot completely avoid braking noise, especially low-frequency braking noise below 500 Hz. Moreover, the method o...

Claims

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