Noise imaging detection device and detection calculation method for transformer substation

Abstract

The invention discloses a noise imaging detection device and a noise imaging detection calculation method for a transformer substation. The noise imaging detection device consists of a microphone sound pick-up array, an audio preprocessing module, a multipath audio acquisition card, a digital signal processing control module, a short-term energy spectrum estimating unit, a sound mixing unit, a client, a display, an input keyboard and an acousto-optic alarm. According to the detection calculation method, the accurate time when a noise source reaches a sound pick-up is acquired by establishing a three-dimensional sound pick-up distribution model, and fault noise can be positioned rapidly and accurately via audio preprocessing, sound mixing processing, short-term energy spectrum estimation and application of three-dimensional spatial time difference positioning algorithm program calculation, so that technical support is provided for a high-voltage transformer substation to timely control the equipment running situation in an unattended machine room, and theoretical basis is provided for the accurate judgment of equipment fault points.

Description

technical field [0001] The invention relates to the technical field of noise imaging detection, in particular to a TDOA algorithm-based method, device and detection method for substation noise imaging detection. Background technique [0002] The high-voltage machine room of a substation is an environment with multiple noises. When some faults occur in the equipment, sometimes there will be some abnormal sounds, and these abnormal sounds are mixed in the environmental noise. If these abnormal sounds can be accurately located, the faulty equipment can be accurately judged, thereby troubleshooting and reducing the loss caused by equipment failure to the substation. [0003] However, the high-voltage machine room of the substation is also a place with a relatively special environment. When the substation is running, people are not allowed to approach the equipment. It is a dangerous area. People are prohibited from approaching during work. The detection of its fault defects is...

AI Technical Summary

Problems solved by technology

[0003]However, the high-voltage machine room of the substation is a place with a relatively special environment. When the substation is running, people are not allowed to approach the equipment. It is a dangerous area, and personnel are prohibited from approaching during work. , therefore, the equipment failure cannot be predicted and cannot be located after the equipment failure, so it is very difficult to detect its failure defects

During regular maintenance, technicians cannot reproduce the fault phenomenon at high pressure. This problem has not been solved and a breakthrough has been made. We can only rely on manual inference and large-scale replacement of equipment.

However, in the actual environment, there are often irrelevant background noise and reverberation, which will seriously affect the quality of the signal received by the microphone pickup

Computing delays with classical or modified methods often fails when noise and reverberation are considered

Images