Acoustic imaging apparatus, method, device and system for detecting abnormal sound of transformer

Abstract

The invention relates to an acoustic imaging apparatus, method, device and system for detecting abnormal sound of a transformer. The acoustic imaging apparatus for detecting the abnormal sound of thetransformer comprises an image acquisition apparatus, a sound acquisition apparatus and a single-chip microcomputer which is connected with the image acquisition apparatus and the sound acquisition apparatus. The single-chip microcomputer acquires an acoustic emission plane of the transformer and performs gridding processing on the acoustic emission plane to obtain each grid node; the single-chipmicrocomputer acquires sound propagation time delay from each grid node to each acoustic sensor, and performs reconstruction processing on the sound wave signal according to the sound propagation timedelay to obtain a reconstructed sound wave signal; the single-chip microcomputer carries out superposition processing on the reconstructed sound wave signal and the initial sound wave signal to obtain an acoustic cloud atlas; and generates an abnormal sound image of the transformer according to the acoustic cloud picture and the optical image information. The position and intensity information ofa sound source point can be visually obtained, so that the abnormal sound position is obtained. The single-chip microcomputer is used for acoustically imaging the abnormal sound of the transformer, and the problem that traditional equipment is high in cost is solved.

Description

technical field

[0001] The present application relates to the technical field of transformer detection, in particular to an acoustic imaging device, method, device and system for detecting abnormal noise of a transformer. Background technique

[0002] The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. The transformer will produce a certain sound during operation, and it will also produce a certain abnormal sound when a fault occurs. Now the power Some usually use acoustic imaging measurement technology to detect the abnormal sound generated by the voltage transformer, so as to achieve the purpose of detecting whether the transformer is faulty.

[0003] During the imple...

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