Patent ID: 9739752
Date: 2017-08-22
CPC Classifications: G01N,G01S

Claim:
1. A non-destructive testing method, the method comprising: transmitting ultrasound signals from a plurality of positions to a structure under test; detecting, at said plurality of positions, reflections of the transmitted signals from the structure; selecting a set of one or more reflection points in the structure; computing ultrasound propagation travel times for ultrasound travelling along travel paths between the set of one or more reflection points on a first end of each travel path and the plurality of positions on a second end of each travel path by fitting the ultrasound propagation travel times to observed elapsed time delay values between the transmission from the plurality of positions and the detection of the detected reflections at the plurality of positions wherein the computed ultrasound propagation travel times are not equal to the observed elapsed time delay values; using the ultrasound propagation travel times computed for the set of one or more reflection points to compute estimated further ultrasound propagation travel times for ultrasound travelling between the plurality of positions at first ends of further travel paths and further points in the structure at second ends of further travel paths; and computing an image of reflections at said further points from the detected reflections using the estimated further ultrasound propagation travel times.