Ultrasonic Testing - Reconstruction of Reflectors from Time-Delay and Amplitude-Locus Curves
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
For ultrasonic testing (pulse-echo or tandem) the surface of a test piece is scanned by a probe or a probe array. Time-delay and amplitude for each pulse, locus of incidence, reflector inside the beam and wave path, are measured. Shape and position of reflectors are reconstructed from time-delay locus curves. In addition, isolated amplitude-locus curves derived from measurements are compared to calculations for several reflector modes. The best fitting model is selected. Diameter or width and inclination are determined.