【摘要】 针对声发射信号分析和声源定位问题,提出了基于广义S变换的声发射信号分析方法和三维空间定位方法,推导出了广义S变换的实现过程,使用广义S逆变换对信号进行去噪重构.为保证各传感器时差的准确性,本文利用广义S变换分析声发射信号,提取其主频带能量序列曲线上峰值所对应的时间进行时差计算,然后结合三维空间定位方法对声发射源进行精确定位.仿真实验结果表明该算法能够实现声发射信号的特征提取和准确定位,且误差小,可靠性好.更多还原

【Abstract】 To solve the analysis and location of acoustic emission(AE),an approach combining generalized S-transform(GST) and three-dimension location was proposed,implementation process of GST was derived,and AE signal was de-noised by inverse generalized S-transform.GST was introduced in acoustic emission signals analysis to ensure the accuracy of time differences,the peak time on the main frequency energy serials was extracted to compute time difference,then the sound source was located combing three-dimension location method.The results show that the method could extract effective features of acoustic emission and give accurate location with little error and good reliability.更多还原