Taking laser Doppler vibrometry off the tripod

Halkon, B; Rothberg, S

Taking laser Doppler vibrometry off the tripod

Halkon, B

Rothberg, S

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Publication Type:: Conference Proceeding
Citation:: 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling, 2018, 1 pp. 136 - 143
Issue Date:: 2018-01-01

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Field	Value	Language
dc.contributor.author	Halkon, B https://orcid.org/0000-0001-5459-2329	en_US
dc.contributor.author	Rothberg, S	en_US
dc.date.issued	2018-01-01	en_US
dc.identifier.citation	25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling, 2018, 1 pp. 136 - 143	en_US
dc.identifier.isbn	9781510868458	en_US
dc.identifier.uri	http://hdl.handle.net/10453/127902
dc.description.abstract	© 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. All rights reserved. Laser Doppler vibrometers are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite over 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, sensitivity to instrument vibration and steering optics vibration is confirmed before development theoretically and experimentally of practical schemes to enable correction of measurements. In the case of instrument vibration, the correction scheme requires a pair of sensors with appropriate orientation and relative location. In the case of a beam steering mirror vibration, the correction scheme requires a single measurement from an appropriate location on the back-surface of the mirror in line with the laser beam incidence point. In both cases, frequency domain processing conveniently accommodates inter-channel time delay and signal integrations. Error reductions in excess of 30 dB are delivered in laboratory tests with simultaneous instrument / steering optic and target vibration over a broad frequency range. The practical nature of the correction techniques is demonstrated by successful applications of each. Finally, a previously unreported challenging real-world measurement scenario is described.	en_US
dc.relation.ispartof	25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Taking laser Doppler vibrometry off the tripod	en_US
dc.type	Conference Proceeding
utslib.citation.volume	1	en_US
utslib.for	0913 Mechanical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	1	en_US

Abstract:

© 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. All rights reserved. Laser Doppler vibrometers are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite over 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, sensitivity to instrument vibration and steering optics vibration is confirmed before development theoretically and experimentally of practical schemes to enable correction of measurements. In the case of instrument vibration, the correction scheme requires a pair of sensors with appropriate orientation and relative location. In the case of a beam steering mirror vibration, the correction scheme requires a single measurement from an appropriate location on the back-surface of the mirror in line with the laser beam incidence point. In both cases, frequency domain processing conveniently accommodates inter-channel time delay and signal integrations. Error reductions in excess of 30 dB are delivered in laboratory tests with simultaneous instrument / steering optic and target vibration over a broad frequency range. The practical nature of the correction techniques is demonstrated by successful applications of each. Finally, a previously unreported challenging real-world measurement scenario is described.

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http://hdl.handle.net/10453/127902