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Automobile outfield pass-by-noise source recognition system and method

A sound source identification and noise technology, applied in radio wave measurement systems, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of less sound source identification technology, high cost, complex hardware system, etc., to reduce construction costs, The effect of improving the convenience of use and reducing the number of

Inactive Publication Date: 2012-05-09
CHONGQING UNIV
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AI Technical Summary

Problems solved by technology

[0002] The direct moving sound source identification method can accurately identify the noise source and accurately reflect the relationship between the sound source and working conditions, position changes and other factors, but there are few sound source identification technologies that can accurately identify moving sound sources. Form the combination of the sound source system and the complete vehicle acceleration noise measurement system, realize the measurement of the acceleration noise outside the vehicle and the identification of the motion sound source, but the required hardware system is relatively complicated and the cost is high

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  • Automobile outfield pass-by-noise source recognition system and method
  • Automobile outfield pass-by-noise source recognition system and method
  • Automobile outfield pass-by-noise source recognition system and method

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing and embodiment the present invention is further described as follows:

[0030] The structure of the passing noise sound source recognition system outside the automobile field of the present invention is as follows: figure 1 shown, where:

[0031] The engine speed sensor is composed of a KMT8000 cigarette lighter speed probe and a wireless transmission unit, which can receive the engine speed signal in real time and transmit it to the ground acquisition system by wireless;

[0032] The vehicle speed sensor is a speed measuring radar, which can monitor the relationship between the speed of the vehicle entering the test area and the relationship with time in real time;

[0033] The zero position trigger sensor is composed of a photoelectric trigger switch and a reflector, which can record the initial moment when the tested vehicle enters the test area;

[0034] The microphone array and data acquisition unit use the PULSE41-c...

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Abstract

Aiming at a direct movement sound source recognition method and based on the combination of a beam forming sound source system and an integrated automobile outfield acceleration noise measurement system, the invention provides a automobile outfield pass-by-noise source recognition system which comprises a test computer, an ESS (engine speed sensor), a vehicle speed sensor, a zero position triggering sensor, a microphone array, a data acquisition unit and noise source recognition software. The system is simple in hardware connection, easy for algorithm implementation, low in cost and higher inmeasurement accuracy, and can be used for acquiring the relationship between the automobile running position and time, the relationship between the engine speed and the automobile position, the relationship between the automobile outfield acceleration noise and the automobile position, the engine speed corresponding to the maximal automobile outfield acceleration noise and the relationship between a noise source imaging plane and the automobile position during an automobile acceleration process.

Description

technical field [0001] The invention belongs to the automobile noise identification technology, in particular to a system and method for identifying the sound source of the passing noise in the exterior field of the automobile. Background technique [0002] The direct moving sound source identification method can accurately identify the noise source and accurately reflect the relationship between the sound source and working conditions, position changes and other factors, but there are few sound source identification technologies that can accurately identify moving sound sources. The combination of the sound source system and the complete exterior acceleration noise measurement system realizes the measurement of exterior acceleration noise and the identification of motion sound sources, but the required hardware system is relatively complex and expensive. Contents of the invention [0003] The purpose of the present invention is to address the above-mentioned deficiencies ...

Claims

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Application Information

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IPC IPC(8): G01H17/00G01S5/18
Inventor 褚志刚王卫东蒋忠翰杨洋
Owner CHONGQING UNIV
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