Abstract
In the field of industrial non-destructive testing, the three-dimensional imaging technology of ultrasonic testing can intuitively represent the three-dimensional spatial characteristics of defects, making it convenient for non-destructive testing personnel to make accurate judgments on the internal defect information of the tested workpiece. This article conducts a comprehensive study on multi element synthetic aperture focused ultrasound imaging. Based on the radiation theory of sound field, the sound pressure distribution of multi element aperture was derived, and the sound field and defect response of single element, multi element focused, and multi element unfocused were simulated. It was found that multi element unfocused sound field is more suitable for synthetic aperture focused ultrasound imaging. The results indicate that in far-field conditions, multi element synthetic aperture focused ultrasound imaging can achieve higher imaging quality and resolution than single element synthetic aperture focused imaging.
Published Version
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