排序方式: 共有1条查询结果,搜索用时 0 毫秒
1
1.
Ultrasonic flaw detection using EMD-based signal processing 总被引:1,自引:0,他引:1
The precise detection of flaw echoes buried in backscattefing noise caused by material microstructure is a problem of great importance in uhrasonic non-destructive testing (NDT). In this work, empirical mode decomposition (EMD) is proposed to deal with ultrasonic signal. A time-frequency filtering method based on EMD is designed to suppress noise and enhance flaw signals. Simulated results are presented, showing that the proposed method has an excellent performance even for a very low signal-to-noise ratio (SNR). The improvement in flaw detection was experimentally verified using stainless steel pipe sample with artificial flaws. 相似文献
1