Demonstration of a Novel Equation for the Near Field Distance Calculation for Annular Phased Array Transducers

Liaptsis, Georgios and Liaptsis, Dimosthenis and Charlton, Peter (2014) Demonstration of a Novel Equation for the Near Field Distance Calculation for Annular Phased Array Transducers. The e-Journal of NDT, 19 (11). ISSN 1435-4934

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Annular phased array transducers are well known in the medical field, with their main use being in ophthalmology and dermatology, and have started to be employed in the NDT industry relatively recently. They have a unique geometry and can focus at great depths into a material with both a symmetric and circular focal point. This paper tries to broaden the existing knowledge of these unique types of transducers. The paper starts with the necessary fundamentals and provides near field calculations for two different annular array probe configurations. The importance of this work relates to the limitations of the conventional equation to annular arrays. A major contribution is the generation of a novel equation for near field calculation for annular arrays. Validation of the novel near field equation has been carried out computationally, for both individual elements as well as different aperture sizes.

Item Type: Article
Uncontrolled Keywords: Annular Phased Array Transducers
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Institutes and Academies > Wales Institute for Science & Art (WISA) > Academic Discipline: Engineering
Depositing User: Professor Peter Charlton
Date Deposited: 18 Jan 2017 15:16
Last Modified: 12 Apr 2023 11:12

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