中文摘要：

为了精确地获取声发射源信息，必须采取有效手段对声发射信号进行分析。小波分析同时具有时一频局部化的优良特性，用小波自适应地对声发射信号进行多分辨率的分解，在相平面中绘制系数能量图可以同时直观地观察声发射信号的频率、时间、能量等信息。同时，相平面系数能量图也为小波重构声发射信号提供了理论依据，在此基础上重构的声发射信号排除了其它信号的干扰，更能表征声发射源信息，对声发射源的分析有重要的意义。

英文摘要：

In order to obtain accurate information of acoustic emission （AE） source, effective means to analysis AE signal must be used. Wavelet analysis provides outstanding detailed characteristics both in time and frequency. Coefficients can be obtained through serf-adapting decomposing of AE signals in the wavelet multilevel analysis, The frequency, time, energy and other information of AE signal can be observed directly in the phase plane. Meanwhile, it also provides a theoretical basis for wavelet AE signal reconstruction. Based on this, the reconstructed AE signal excludes interference of other signals and can show AE source information more clearly. This method is useful in AE sources analysis.