基于小波变换的岩体AE波形特征研究  

Research of Wave Characteristics of Rock AE Based on Wavelet Transform

作　　者：何建平[1] 王宁[2] 

机构地区：[1]洛阳工业高等专科学校,河南洛阳471003 [2]西南科技大学,四川绵阳621010

出　　处：《工矿自动化》2007年第4期14-17,共4页Journal Of Mine Automation

基　　金：四川省教育厅自然基金资助项目(2004A121)

摘　　要：文章对室内声发射事件能率与应力的关系及波形特性进行了分析。通过小波变换,将室内岩体声发射等波形分解成低频和高频信号,对其原始声发射波形、细节信号和近似信号进行比较与分析,结果表明岩体在变形损伤破裂过程中不同时期的声发射波形特征不同。据此,可建立声发射波形特征库,用于预测预报岩体受损变形过程的发展趋势和规律。对含有信号部分的小波系数进行重构后,该信号与原始信号的误差小于10-10,说明小波分析可使岩体声发射波形特征预测预报的准确度和可靠性得以提高。The relationship between stress and AE rate and wave characteristics of AE in laboratory were analyzed in the paper. Based on wavelet transform, the rock AE wave in laboratory was decomposed into high and low frequency signal,then the original AE wave,detailed signal and approximate signal were analyzed and compared,and the result showed that wave characteristics of rock AE in different period were not same in the course of rock distortion,damnification and fracture. So it can build AE wave characteristics storehouse which was used to forecast development trend and regularity in the course of rock distortion, damnification and fracture. The error between the original signal and the reconstructed signal of wave coefficient containing signal elements was less than 10^-10 ,which indicated that the wavelet analysis can im prove accuracy and reliability of forecasting wave characteristics of rock AE.

关 键 词：岩体声发射 波形特征 岩体破裂 小波变换 

分 类 号：TD326[矿业工程—矿井建设] TM919.81[电气工程—电力电子与电力传动]