Guided waves modes identification in pipes detection by application of the matching pursuit method
Guided waves have the multi-modes and dispersive characteristic and the mode conversion at boundary or with defects in pipes, which make it very difficult to identify different guided waves mode reflection signals in pipes detection. The experiment method is using guided waves to detect two stainless steel pipes, one pipe has no defect and another pipe has a hole defect. The guided waves detection echo signals are obtained. By calculating the Chirplet match atom parameters and the time frequency distributions spectrum of guided waves detection echo signals, guided waves mode with T(0,1),F(1,2) and L(0,2) are respectively identified for no defect pipe detection, and defect echo consisted by two wave-packets with T(0,1) and F(1,2) mode is also identified for defect pipe detection. The results show that the matching pursuit method has a tremendous advantage to identify different guided waves modes signals in pipes non-destructive testing.
matching pursuit method guided waves time-frequency representation
Wang Yuemin Zhu Longxiang Luo Fan Sun Fengrui
College of Architecture and power,Naval University of EngineeringWuhan 430033,China
国际会议
2011 10th International Conference on Electronic Measurement & Instruments(第十届电子测量与仪器国际会议 ICEMI2011)
成都
英文
1150-1153
2011-08-16（万方平台首次上网日期，不代表论文的发表时间）