Large power facility sound power level field measurement method and device thereof

A technology for power facilities and sound power levels, which is used in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc. It can solve the problems of complex distribution of on-site sound sources, and it is difficult to measure the sound power level of large-scale power facilities. Fast, accurate and reliable measurement data, and the effect of ensuring accuracy

Inactive Publication Date: 2014-09-24
STATE GRID CORP OF CHINA +2
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Problems solved by technology

The sound power level measurement method in the prior art requires a specific experimental environment, and after large-scale power facilities are installed on site, the noise may change greatly due to changes in the installation level, voltage and load, and due to the complex distribution of on-site sound sources, therefore It is difficult to quickly and accurately measure the sound power level of large-scale power facilities based on existing methods

Method used

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  • Large power facility sound power level field measurement method and device thereof
  • Large power facility sound power level field measurement method and device thereof
  • Large power facility sound power level field measurement method and device thereof

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Embodiment Construction

[0038] Such as figure 1 As shown, the implementation steps of the method for on-site measurement of the sound power level of large electric facilities in this embodiment are as follows:

[0039] 1) Select the outline of the large-scale power facility to be measured as the reference launch surface;

[0040] 2) Set a measurement surface arranged parallel to the reference emission surface, divide the measurement surface into several local measurement surfaces, and calculate the area of ​​the local measurement surface;

[0041] 3) Detect the average normal sound intensity value with positive and negative signs on each local measurement surface;

[0042] 4) Calculate the sound power level of large electric facilities according to formula (1);

[0043] L W = 10 lg | Σ i N I ...

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Abstract

The invention discloses a large power facility sound power level field measurement method and a device thereof. The method comprises a step of selecting the outer profile of a measured large power facility as a reference emission surface, a step of setting a measurement surface which is parallel to the reference emission surface, dividing the measurement surface into a plurality of local measurement surfaces, and calculating the areas of the local measurement surfaces, a step of detecting a mean normal sound intensity value with positive and negative symbols at each local measurement surface, and a step of calculating the sound power level of the large power facility. The device comprises a guide rail assembly and a constant speed moving mechanism which is slidingly arranged on the guide rail assembly. The constant speed moving mechanism is provided with a sound intensity probe, an analog-to-digital conversion module, a data transmission module and a power supply module. The sound intensity probe, the analog-to-digital conversion module and the data transmission module are connected in sequence. The method and the device have the advantages of fast measurement speed, accurate and reliable measurement data, less investment and convenient implementation and are suitable for large power facility sound power level field rapid and accurate measurement.

Description

technical field [0001] The invention relates to the technical field of environmental protection in high-voltage power transmission and transformation projects, in particular to a method and device for on-site measurement of the sound power level of large electric facilities. Background technique [0002] With the simultaneous rapid advancement of power grid construction and urban development, the distance between power facilities including substations and environmentally sensitive points such as residential areas is more difficult to control, and environmental protection disputes caused by the noise of power facility operation occur from time to time. Operational pressures have made the siting of power facilities increasingly difficult. [0003] The sound power level of power facilities as a noise source is one of the important parameters for the prediction, evaluation and governance of substation noise environment impact. The sound power level measurement method in the pri...

Claims

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Application Information

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IPC IPC(8): G01H17/00
Inventor 周建飞周年光彭继文车垚吕建红胡胜欧阳玲阳金纯
Owner STATE GRID CORP OF CHINA
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