Analysis of rail acoustic model based on phased ultrasonic array

Abstract In the traditional ultrasonic flaw detection, two forms of A scan and B scan are mainly used to check the echo information. The traditional method of defect analysis can only detect the existence of defects, but can not locate the exact position and shape of defects. In this paper, we will present a method of locating the defects in ultrasonic detection for rail. In this method, the position information and incidence angle of ultrasonic probe are obtained, and then the propagation path of primary wave and secondary wave of ultrasonic wave in rail is calculated by mathematical modeling. Finally, the internal defects of rail can be located by combining the echo information collected by ultrasonic probe.