Acoustic array device for vehicle tire noise power level testing
A technology of noise power and sound array, applied in the field of noise measurement, can solve the problem of large influence of sensor position test results, and achieve the effect of avoiding errors
Active Publication Date: 2019-08-30
GEELY AUTOMOBILE INST NINGBO CO LTD +1
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Problems solved by technology
This method can effectively evaluate the acoustic characteristics of a single wheel, but the position of the sensor has a great influence on the test results
The above test methods and equipment have their own strengths, but there is no effective platform and method to measure the sound source characteristics of tire noise, that is, the area of action between the tire and the road surface is the noise source, the sound energy radiated by it / What is the total value and frequency characteristics of the sound power
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[0030] figure 1 It is a top structural schematic diagram of an acoustic array device for testing tire noise power level of a vehicle according to an embodiment of the present invention. figure 2 is based on figure 1 The schematic diagram of the front view structure of the acoustic array device used to test the tire noise power level of the vehicle shown. Combine below figure 1 and figure 2 The acoustic array device for testing tire noise power level of a vehicle according to the present invention is described in detail. The present invention provides an acoustic array device for testing the tire noise power level of a vehicle, which includes a hemispherical envelope support 1 , several microphones 2 arranged on the hemispherical envelope support 1 and a sound evaluation module 3 . The hemispherical envelope bracket 1 covers the passing area of the vehicle, that is, the vehicle is located at the lower part of the hemispherical envelope bracket 1 when the actual tire noi...
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The invention provides a sound array device for vehicle tire noise power level testing and belongs to the technical field of noise measurement. The device comprises a hemispherical enveloping surface support, a plurality of microphones arranged on the hemispherical enveloping surface support and a sound evaluation module. The hemispherical enveloping surface support covers the area where a vehicle passes. The plurality of microphones are uniformly and symmetrically distributed on the hemispherical enveloping surface of the hemispherical enveloping surface support. The sound evaluation module is connected with the plurality of microphones and is used for receiving and analyzing noise information collected by the plurality of microphones. The sound array device for vehicle tire noise power level testing is based on the sound array technology, collects the vehicle tire noise power information by uniformly and symmetrically arranging the plurality of microphones on the hemispherical enveloping surface support, tests tire noise power of vehicles of different sizes and types, and finally extracts sound source features of tire noise.
Description
technical field [0001] The invention relates to the technical field of noise measurement, in particular to an acoustic array device for testing tire noise power levels of vehicles. Background technique [0002] When the driving speed reaches 50km / h, the rolling noise caused by the interaction between the tire and the road surface (hereinafter referred to as tire noise) gradually appears; when the driving speed exceeds 80km / h, tire noise becomes the main component of the driving noise. [0003] At present, there are three main methods for testing tire noise: 1. Coast-by method: After the test vehicle is equipped with the tires to be tested, all auxiliary systems not related to safety of the engine are turned off, and coast-by coasts in an open test area. Microphones are arranged at a certain distance on both sides of the vehicle to measure the pass-by noise. This method can effectively evaluate the far-field characteristics of tire noise, but it cannot separate and analyze t...
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IPC IPC(8): G01H11/06
Inventor 毛杰朱凌
Owner GEELY AUTOMOBILE INST NINGBO CO LTD