Time Domain/Frequency Domain SAFT Imaging in Thin-Diameter Rod

Abstract

The ultrasonic flaw reflected signal of the thin-diameter rod was acquired by the general ultrasonic C-scan testing device. And synthetic aperture focusing technique be used in ultrasonic imaging of thin-diameter rod. Respectively, Comparing B-scan imaging and Conventional synthetic aperture focusing technique imaging as well as Frequency domain synthetic aperture focusing technique imaging . The final results show that both time domain and frequency domain synthetic aperture method could obtain a higher signal-to-noise ratio and testing resolution.

Frequency domain synthetic aperture focusing technique for variable-diameter cylindrical components

“…To guarantee the functionality of these products, the use of ultrasonic non-destructive testing (UNDT) makes significant sense for quality assurance. [1][2][3] In typical cylindrical ultrasonic testing, a transducer moves over the surfaces of cylinders along circular trajectories, recording the reflection echo signals and imaging the inner defects. The ultrasonic beam is assumed to be very narrow and to only illuminate regions of the object located directly in front of the transducer.…”