Petcher, P. A. and Dixon, S. (2011) Non-contact position tracking using phase correlation of sample images for NDT applications. Insight - Non-Destructive Testing and Condition Monitoring, Vol.53 (No.4). pp. 185-192. doi:10.1784/insi.2011.53.4.185 ISSN 1354-2575.

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Abstract

Non-destructive testing methods are used in an increasing number of applications, some of which require precise knowledge of the relative position between transducer and surface. Conventionally, this has been determined using a contact method such as a linear/rotary encoder. An alternative is demonstrated here, using a digital camera and the phase correlation technique. Linear sample movement has been determined to sub-pixel precision, confirmed manually as a median accuracy of 0.01 mm of linear movement (0.06 of a pixel) in this case, despite uneven illumination and the use of a basic low-resolution camera.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Nondestructive testing
Journal or Publication Title:	Insight - Non-Destructive Testing and Condition Monitoring
Publisher:	British Institute of Non-Destructive Testing
ISSN:	1354-2575
Official Date:	1 April 2011
Dates:	Date Event 1 April 2011 Published
Volume:	Vol.53
Number:	No.4
Page Range:	pp. 185-192
DOI:	10.1784/insi.2011.53.4.185
Status:	Peer Reviewed
Publication Status:	Published

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