A power transformation main device voiceprint signal collection method and system

Abstract

This invention discloses a method and system for acquiring acoustic signature signals of substation main equipment, comprising: synchronously acquiring multi-channel raw acoustic signature signals through an acoustic signature sensor array, and achieving signal alignment by using spatial orientation coding for phase correction. The acoustic signature envelope features are extracted and matched with a standard template to obtain the operating condition matching degree. Based on this, the dominant channels are selected and weighted fusion is performed to generate an enhanced acoustic signature signal. Finally, the enhanced signal is separated into intrinsic mode components reflecting the vibration characteristics of different components through joint time-frequency domain decomposition. This method can improve the signal-to-noise ratio of the acoustic signature signal, clearly separate the vibration characteristics of each component inside the equipment, and provide a more accurate data foundation for the condition monitoring and fault diagnosis of substation main equipment.

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