
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
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
Keywords: ultrasonic Inspection, phased array transducer, full-matrix capture, result processing