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Large-area surface imaging methods using ultrasonic Rayleigh waves, phased array and full matrix capture for non-destructive testing

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Current methods for surface wave inspection are based on conventional ultrasonic techniques, limiting their use due to the high level of skill required to interpret the data and perform the inspection. Phased array techniques offer the ability to better visualise the data while electronically beam steering, thus reducing mechanical movement and speeding up the inspection process, however, its use for surface wave imaging is limited. This paper presents a series of algorithms that allow for large-area surface imaging using both phased array and full matrix capture (FMC) and demonstrates an ability to visualise beyond the wedge footprint, thus exceeding current capabilities within industry. An experimental configuration is presented that demonstrates the ability to achieve high-resolution images within an industrial context.
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Document Type: Research Article

Publication date: July 1, 2019

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