UNSPECIFIED (2004) Imaging using air-coupled polymer-membrane capacitive ultrasonic arrays. In: Ultrasonics International 2003 Meetng, Granada, SPAIN, JUN 30-JUL 03, 2003. Published in: ULTRASONICS, 42 (1-9). pp. 859-864.

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Abstract

Polymer-membrane capacitive ultrasonic linear and 2-D arrays have been fabricated for use in air-coupled imaging. By using arrays as receivers, there is a possibility of much faster imaging as the need for physically moving the receiver to scan a sample can be replaced by electronic multiplexing. In order to utilise this, a through-thickness air-coupled image of a composite plate has been made using a 2-D array as a receiver and a comparatively large planar Source in air. This was made possible by the use of a chirp drive signal and cross-correlation on the measured waveform. Larger 2-D arrays with an increased number of elements have been simulated using a small scanned single receiver, and excellent imaging potential demonstrated. In addition two array receivers have been used in conjunction with two methods of post-processing, SAFT and ellipse crossing, to locate objects accurately. (C) 2004 Elsevier B.V. All rights reserved.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) R Medicine
Journal or Publication Title:	ULTRASONICS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0041-624X
Date:	April 2004
Volume:	42
Number:	1-9
Number of Pages:	6
Page Range:	pp. 859-864
Identification Number:	10.1016/j.ultras.2004.01.065
Publication Status:	Published
Title of Event:	Ultrasonics International 2003 Meetng
Location of Event:	Granada, SPAIN
Date(s) of Event:	JUN 30-JUL 03, 2003
URI:	http://wrap.warwick.ac.uk/id/eprint/8495

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