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
CN102445266AInactive Publication Date: 2012-05-09CHONGQING UNIV
4 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2012-05-09
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More