Testing device for multichannel substation noise comprehensive cloud picture

Abstract

The invention discloses a testing device for a multichannel substation noise comprehensive cloud picture. The testing device comprises a fixing disc which is mounted on a movable base through a pitching adjusting device, and a rail is arranged on the fixing disc. A floating disc is mounted on the rail, and a camera is arranged on the fixing disc. All array arms are hinged to the fixing disc, and each array arm is connected with the floating disc through a connecting rod. The two ends of the connecting rods are hinged to the array arms and the floating disc correspondingly, and a plurality of acoustic sensors are arranged on each array arm. The camera and signal outputting ends of all the acoustic sensors are both connected with a signal receiving end of a data collecting and processing device. The data collecting and processing device comprises a sensor plate, an FPGA, a power supply and an upper computer. The power supply is connected with the FPGA connected with the upper computer. Through to-be-detected areas traversing a whole substation, noise positioning of the whole substation can be completed, and the noise comprehensive cloud picture of the whole substation can be obtainedby splicing noise testing images of all detecting points.

Description

technical field [0001] The invention belongs to the technical field of substation noise testing, in particular to a multi-channel type substation noise comprehensive cloud image testing device. Background technique [0002] Accurate separation and measurement of substation internal noise is the key to the control and prevention of substation environmental noise. However, the measurement of substation noise is affected by external environmental factors, including background noise and weather. In the actual measurement, in addition to the noise generated by the sound source under test, there will also be other noises, such as the impact of noise from living and working backgrounds such as the flow of people and traffic around the substation, as well as transient noises such as dog barking and motorcycle sound. Noise, the sum of these noises is called background noise, background noise will affect the accuracy of the measurement. Usually the noise of a certain machine is meas...

AI Technical Summary

Problems solved by technology

However, the substation in operation cannot be stopped just because of the measurement of its environmental noise, so the noise measured by a single sound level meter is the superposition of the substation's own noise and other environmental noise

Using a single sound level meter, it is difficult to distinguish the source, distribution, size, spectrum characteristics and other parameters of the internal noise of the substation, which is not conducive to the division of responsibilities for substation equipment noise, and brings inconvenience to the control of substation environmental noise

[0003] Existing volume array testing devices can only measure the image of a single measuring point. Generally, the volume array noise testing device is used to measure the sound image distribution map of a certain measuring point, and then the obtained sound field distribution map is input into the software for simulation to obtain The integrated cloud image of the noise simulation of the substation, the accuracy of the integrated cloud image simulated by software is poor, limited by the number and distribution of measuring points, it cannot accurately reflect the distribution of noise sources in the substation, and cannot meet the noise rectification and environmental requirements of the substation. In order to meet the needs of evaluation, there is an urgent need for a device that can directly measure the comprehensive cloud image of substation noise

In addition, the existing volume array test device needs to detect more measuring points, and a large amount of data needs to be processed and transmitted. Due to the need for image superposition, there are high requirements for the reliability of data transmission. The existing volume array test Most of the data acquisition and transmission devices of the device use general-purpose data acquisition instruments. The common problems are: the high price leads to high test costs; traditional data acquisition instruments have many redundant functions, and damage to useless functions will also affect the overall quality of the data acquisition instrument. The use of the computer, resulting in poor reliability of data transmission

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