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Flexural Transducer Arrays for Industrial Non-Contact Applications

Eriksson, Tobias and Ramadas, Nishal and Unger, Alexander and Hoffmann, Maik and Kupnik, Mario and Dixon, Steve (2015):
Flexural Transducer Arrays for Industrial Non-Contact Applications.
In: IEEE IUS 2015, Taipei, Taiwan, 21.10.2015-24.10.2015, [Conference or Workshop Item]

Abstract

A new method of constructing robust air-coupled flexural ultrasound arrays is suggested, and results from a prototype transducer are presented. The flexural elements are defined on a single sheet of metal by bonding a baffle structure to the back of the sheet. Piezoelectric elements were attached directly to the metal plate in the centre of the holes in the baffle. The aim was to find if the baffle could sufficiently separate the elements, such that each element behaved like a flexural transducer with radius equal to the radius of the holes in the baffle. By measuring the front face displacement of the array the vibration mode of individual elements could be characterised and compared to those of a single element transducer. In general the baffle sufficiently separated the flexural elements, such that the vibration modes observed corresponded to those of an edge clamped plate with a radius 1.5 mm larger than that of the holes in the baffle. This is a small shift, which is explained by the outer boundary being less well defined for the array elements, compared to a single element flexural transducer.

Item Type: Conference or Workshop Item
Erschienen: 2015
Creators: Eriksson, Tobias and Ramadas, Nishal and Unger, Alexander and Hoffmann, Maik and Kupnik, Mario and Dixon, Steve
Title: Flexural Transducer Arrays for Industrial Non-Contact Applications
Language: English
Abstract:

A new method of constructing robust air-coupled flexural ultrasound arrays is suggested, and results from a prototype transducer are presented. The flexural elements are defined on a single sheet of metal by bonding a baffle structure to the back of the sheet. Piezoelectric elements were attached directly to the metal plate in the centre of the holes in the baffle. The aim was to find if the baffle could sufficiently separate the elements, such that each element behaved like a flexural transducer with radius equal to the radius of the holes in the baffle. By measuring the front face displacement of the array the vibration mode of individual elements could be characterised and compared to those of a single element transducer. In general the baffle sufficiently separated the flexural elements, such that the vibration modes observed corresponded to those of an edge clamped plate with a radius 1.5 mm larger than that of the holes in the baffle. This is a small shift, which is explained by the outer boundary being less well defined for the array elements, compared to a single element flexural transducer.

Uncontrolled Keywords: Flexual Transducer Array, Ultrasound, PZT5H
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design > Measurement and Sensor Technology
18 Department of Electrical Engineering and Information Technology
Event Title: IEEE IUS 2015
Event Location: Taipei, Taiwan
Event Dates: 21.10.2015-24.10.2015
Date Deposited: 04 Nov 2015 13:55
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