Issue << content << Virtual Source Aperture Imaging and Calibration for Ultrasonic Inspections through Dual-Layered Media for Non-Destructive Testing


DOI: 10.12737/article_5c3706cbad12b2.03552634

2018. Vol.21. No. 4, pp. 42-48

Virtual Source Aperture Imaging and Calibration for Ultrasonic Inspections through Dual-Layered Media for Non-Destructive Testing

M. Sutcliffe, P. Charlton, M. Weston, S. Mosey

Since the introduction of full-matrix capture to NDT, there has been advancement in software algorithms allowing for fully focussed 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 receivers, sufficient time-domain signals may be acquired to allow fully focused imagery to be generated.
 
Keywords: ultrasonic Inspection, phased array transducer, full-matrix capture, result processing
 
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NDT in Mining Industry

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NDT in Mining Industry

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