Post Signal Processing of Ultrasonic Phased Array Inspection Data for Non-destructive Testing

摘要：

　　In ultrasonic phased array non-destructive testing,the amplitude of the grain noise can be smaller than that of the echoes,and the grain noise can totally mask echoes characterizing faults.Several algorithms such as band pass filter,low pass filter,wiener deconvolution and wavelet have been employed to reduce the grain noise.In this paper,an actual S-scan detection image was obtained from a real time UT acquisition system,and a comparison of the suppressing groin noise performances of low pass filter and wavelet de-noising algorithm was displayed.The results show that the wavelet de-noising algorithm is better than other algorithms listed in this paper,and it can suppress the amplitude of grain noise from 100% to 20%.This approach is shown to offer significant performance advantages for NDE.

关键词： NDT Ultrasonic phase array Wavelet De-noising

作者: Kun Xiao Qiang Wang Dong Hu

作者单位: Department of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018.P.R.China

会议类型: 国际会议

会议名称: 2012 International Symposium on Safety Science and Engineering in China (2012安全科学与工程国际会议)

会议地点: 北京

会议语种:英文

页码: 419-424

在线出版日期: 2012-11-07（万方平台首次上网日期，不代表论文的发表时间）