Microphone array wireless calibration method based on detection of GIL fault sound

A microphone array and calibration method technology, applied in the direction of electrical components, etc., can solve the problems that cannot meet the actual application requirements, lack of microphone array calibration, etc., and achieve the effect of realizing network and intelligence, improving calibration efficiency, and flexible data transmission

Active Publication Date: 2019-07-23
SUZHOU SOUND TECH TECH CO LTD +1
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Problems solved by technology

For example, the patent application number CN201811054787, an audible sound measurement device and method for GIL breakdown location, does not calibrate the microphone array, which cannot meet the actual application requirements

Method used

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  • Microphone array wireless calibration method based on detection of GIL fault sound
  • Microphone array wireless calibration method based on detection of GIL fault sound
  • Microphone array wireless calibration method based on detection of GIL fault sound

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Embodiment Construction

[0031] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] Since the current methods of judging and monitoring the arc discharge position of transmission lines are not perfect enough, in addition to human visual inspection during daily line inspection, infrared imaging and ultraviolet imaging are mainly used. Among them, manual visual inspection is labor-intensive, and the safety and reliability are low; the infrared imaging method can only detect the local temperature rise when the discharge develops to a relatively serious level; the ultraviolet imager in the ultraviolet imaging method is expensive, considering Economic cost, it is difficult to popularize and use on a large scale.

[0033] At present, the effective positioning method of the GIL breakdown point from the acoustic point of view is: arranging multiple acoustic sensors along the length of the pipe gallery, collecting signals and c...

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Abstract

The invention discloses a microphone array wireless calibration method based on detection of GIL fault sound, which is characterized in that a microphone wireless calibration network system based on the Internet of Things technology is designed and consists of a wireless communication module, a time service module, a signal output module and a data acquisition module. The method comprises steps ofsimulating a point sound source at a spatial position by adopting a multi-channel point sound source spatial sound field synthesis algorithm, and calculating a dynamic sound signal at the spatial position of each microphone in the microphone array and the time delay of the signal reaching the adjacent microphone according to the spatial coordinate of each microphone; a wireless communication module sending an instruction to start a time service module and a signal output module, and a coupling cavity standard sound source connected to a microphone inputting a multi-channel voltage signal intoan array system; and then the data acquisition module acquiring the data to carry out sound source positioning calculation, and comparing the position of the simulation point sound source with the sound source positioning position of the microphone array to realize the calibration of the array positioning accuracy.

Description

technical field [0001] The invention relates to a microphone array wireless calibration method based on detecting GIL fault sound. Background technique [0002] As we all know, by 2020, my country's total installed capacity of power generation will exceed 1.6 billion kilowatts. Due to the geographical distribution of energy resources in my country, energy transmission needs and changing trends, GIL UHV AC lines with strong transmission capacity and low transmission loss have a good development prospect in my country. Due to its large transmission capacity, low loss, high safety, and less susceptible to environmental factors, GIL is more suitable for large-capacity, long-distance power transmission than traditional overhead lines or power cables. [0003] During the UHV power transmission process, short-term intense arc discharge faults will inevitably occur inside the GIL line. Arc discharge not only aggravates the hazards of short-circuit faults in the power system, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00
CPCH04R29/00
Inventor 唐俊李永亮
Owner SUZHOU SOUND TECH TECH CO LTD
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