Method for positioning micro seismic source or acoustic emission source

Abstract

The invention discloses a method for positioning a micro seismic source or an acoustic emission source, which comprises the following steps of: placing a plurality of acoustic emission transducers nearby an object to be detected, and solving position coordinates of the micro seismic source or the acoustic emission source by using a nonlinear least square regression method, such as a simplex acceleration method or a Marquardt method or the like, according to the coordinate values and the time difference of the positions of the known transducers and according to a distance operational formula. The acoustic emission positioning method disclosed by the invention does not need to measure or preset acoustic velocity, can avoid the influence of acoustic velocity measurement on positioning, improves the positioning precision, and is convenient and practical in practical engineering application compared with a traditional method.

Description

technical field

[0001] The invention relates to a positioning method for a microseismic source or an acoustic emission source. technical background

[0002] How to accurately locate the source of material damage or the accompanying microseismic / acoustic emission in the early stage of rockburst is very important. The source localization technology of microseismic / acoustic emission is one of the core issues in the research of acoustic emission technology, and its positioning accuracy reflects the degree of conformity between the detected position of the sound source and the real position.

[0003] Many scientific workers have done a lot of research on the source location of acoustic emission, and proposed many source location methods for acoustic emission, such as the location method based on modal analysis and wavelet transform, and the location method based on neuron network system, etc., but At present, the positioning of acoustic emission instruments still generally adopt...

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