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《Journal of Seismological Research》 2002-04
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The Preliminry Application of Wavelet Analysis to the Data Process of Acoustic Emission

Chen Shunyun Yang Runhai Wang Yunyun Zhao Jinming Xu Zhaoyong(Seismological Bureau of Yunnan Province, Kunming 650041)  
Aiming at some difficulties in the process of analyzing the data of acoustic emission,we apply the wavelet technique which has been developed in recent two decades to the process of the data of acoustic emission.And the result proves to be reliable.Specifically,this method is applied to the following three aspects:①extract significant information.The powerful decomposing capability can be used to pick significant records,and get rid of some unsatisfying channels.In this way,the data of acoustic emission will be regularized and the automatic discernment and read-out of the arrival time would be realized.②separate the superposed events effectively.Combining this method with the whole wave record,the loss of the events will be reduced to the minimum.The precision of statistical figures of the acousitc emission and b-value will be improved.③separate the complex acoustic-wave data into waves with single characteristic.Yet,whether these separated waves belong to P wave or S wave or surface wave still remains undecided.
【Fund】: 中国地震局双重项目 96 9130 90 2 0 30 1;; 国家重点基础研究专项经费G19980 40 70 4资助
【CateGory Index】: P315.8
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