Bi-directional automobile special noise testing method and device

Abstract

The invention discloses a bi-directional automobile special noise testing method. An experimental device used by the method comprises a first sound level meter, a second sound level meter, a third sound level meter, a fourth sound level meter, a high speed data collecting card NI, a computer and a software processing system thereof, a sound-insulating front checking plate, a sound-insulating bottom checking plate, a machine frame, a 12 V accumulator, and a 12 V to 220 V transformer. The device has the beneficial effects of increasing the sound-insulating effect, and testing the noises from two directions of the bottom part and the side face of the device through installing the sound-insulating front checking plate and the first sound level meter and the second sound level meter installed on the sound-insulating front checking plate, the sound-insulating bottom checking plate and the third sound level meter and the fourth sound level meter installed on the sound-insulating bottom checking plate, the high speed data collecting card NI, the computer and the software processing system thereof, discovering the noise frequency distribution of the device in time through FFT data processing of a time domain signal, and providing the reliable experimental data for the automobile noise reduction. The structure is simple, the operation is convenient, and the device is economical and practical.

Description

technical field [0001] The invention relates to the technical field of vibration and noise testing methods and devices, in particular to a two-way vehicle-specific noise testing method and device. Background technique [0002] With the increasingly fierce competition in the auto parts processing market, the popularization of the concept of environmental protection, and the continuous upgrading and application of technology, the international auto parts processing parts industry has shown the following development characteristics in recent years: the trend of supporting auto parts processing systems and modular supply In the ascendant; the globalization of auto parts processing and procurement; the speed of transfer of auto parts processing industry is accelerating. There are many kinds of auto parts. Nowadays, there are more and more brands of cars, and there are more and more types of cars. Cars can be divided into two types: passenger cars and commercial vehicles. Passeng...

AI Technical Summary

Problems solved by technology

Today's society puts forward higher requirements for the noise reduction of automobiles, especially for passenger cars and passenger cars. However, the existing noise

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