Low-frequency noise source positioning device and method based on vector microphone array

A microphone array and low-frequency noise technology, which is applied in the field of low-frequency noise source positioning devices, can solve the problems of array element position sensitivity and poor stability, and achieve good performance, low cost, and the effect of reducing the weight of the array

Inactive Publication Date: 2020-01-14
STATE GRID SHAANXI ELECTRIC POWER RES INST +4
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Problems solved by technology

The disadvantage of this method is that it is sensitive to the position of the element and has poor stability.

Method used

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  • Low-frequency noise source positioning device and method based on vector microphone array
  • Low-frequency noise source positioning device and method based on vector microphone array
  • Low-frequency noise source positioning device and method based on vector microphone array

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Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] see figure 1 and figure 2 , a low-frequency noise source high-precision positioning device based on a vector microphone array in an embodiment of the present invention can be used for transformer and reactor sound source positioning, including: a vector microphone array, an array supporting crawler vehicle, a data acquisition system, an imaging module and its auxiliary equipment.

[0052] The vector microphone array is composed of a vector microphone 1 installed at a fixed position of the array and a DC power supply. For example, the vector microphone 1 may be a microphone independently produced by China Electric Power No. 3 Institute, and is used for collecting and locating low-frequency sound sources of substations and reactors, and the power supply is used to supply power to the vector microphone. The array of the presen...

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Abstract

The invention discloses a low-frequency noise source positioning device and method based on a vector microphone array. The low-frequency noise source positioning device comprises a carrier loader, anarray support frame, a data collection module, an image collection module, a power module, an industrial personal computer and a plurality of vector microphones; the plurality of vector microphones are fixedly installed on the array support frame, and the plurality of vector microphones are arranged in the form of a grid array; the directions of the plurality of vector microphones are unified; a signal output end of each vector microphone is connected with a signal input end of the data collection module, and the signal output end of the data collection module is connected with the signal input end of the industrial personal computer; the signal output end of the image collection module is connected with the signal input end of the industrial personal computer; and the industrial personalcomputer is loaded with a noise source analysis algorithm program, and the noise source analysis algorithm program is complied on the basis of a beam forming method of microphone array signal processing. The low-frequency noise source positioning device disclosed by the invention can realize the positioning of a low-frequency noise source by using the vector microphone array, and meanwhile can improve the positioning accuracy of low-frequency noise source.

Description

technical field [0001] The invention belongs to the technical field of noise source location and array signal processing, and in particular relates to a low-frequency noise source location device and method based on a vector microphone array. Background technique [0002] With the rapid development of power grid construction, the noise problem of substations has become increasingly prominent. At the same time, all sectors of society have higher and higher requirements for environmental protection, and the problem of noise control in substations has become a new hot spot for environmental protection in the power industry. [0003] Noise control methods can be divided into three categories: control of noise sources, control of transmission channels, and protection of receivers. Among the three, control of noise sources is the most effective method; the method of controlling noise sources requires measuring the location of noise sources in substation equipment. Substation nois...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 耿明昕吴健杨坤德吴凯李朋涛王绿申晨韩文赵亚林郭季璞
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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