Virtual source aperture imaging and calibration for ultrasonic inspections through dual-layered media for non-destructive testing
Since the introduction of full matrix capture to non-destructive testing (NDT), there have been advancements in software algorithms allowing for fully-focused imagery to be generated. Due to the large number of time-domain signals associated with this approach, processing speed is often a limiting factor. This paper describes an alternative, less processor-intensive approach in which a parallel transmission of a highly divergent beam is generated to simulate a virtual point positioned some distance behind the transducer. When combined with each element of the array acting as a receiver, sufficient time-domain signals may be acquired to allow fully-focused imagery to be generated.
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Document Type: Research Article
Publication date: November 1, 2017
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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