Automatic waveforms track research on ultrasonic inspection of curved composite surface

In Ultrasonic inspection, scanning program is hard to automatically recognize defect by the A-wave of each scanning point because of varied thickness of curved surface. A flaw wave position-finding technique based on complex wavelet transform was proposed. Wavelet transform was used to draw contour feature wave of ultrasonic radio signal, then found the position of all echo wave by continuous-point threshold algorithm, finally decided the peak and position via surface wave and bottom wave. It is shown that method of wavelet process can find the peak and position of flaw wave accurately.