Focal Law Calculations for Annular Phased Array Transducers

Liaptsis, Georgios and Liaptsis, Dimosthenis and Charlton, Peter and Wright, Ben (2015) Focal Law Calculations for Annular Phased Array Transducers. The e-Journal of NDT, 20 (2). ISSN 1435-4934

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Abstract

One of the most important characteristics of annular arrays is their superior focal capabilities. In order to achieve the desired focussing, each of the elements is fired in different times. The delay times used for beam focussing are called focal laws. The focal laws are automatically calculated from the inspection software. In order to make sure that the focal laws are calculated correctly from the software, it is wise to validate the focal laws for a particular configuration. The validation/comparison will involve the calculation of focal law values using three different methods, from the experimental acquisition software (TWI software) and from simulation software (CIVA). Moreover, one of the methods introduces the concept of centre of mass as an exit point of the beam, which is novel to be investigated because previously only the geometric centre was considered for annular arrays.

Item Type: Article
Uncontrolled Keywords: Annular Phased Array Transducers
Subjects: Q Science > QC Physics
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculties > Faculty of Architecture, Computing and Engineering > School of Logistics and Manufacturing Engineering
Depositing User: Professor Peter Charlton
Date Deposited: 18 Jan 2017 14:58
Last Modified: 18 Jan 2017 14:58
URI: http://repository.uwtsd.ac.uk/id/eprint/684

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