Time-average TV holography for vibration fringe analysis
Time-average TV holography is widely used method for vibration measurement. The method generates speckle correlation time-averaged J0 fringes that can be used for full-field qualitative visualization of mode shapes at resonant frequencies of an object under harmonic excitation. In order to map the amplitudes of vibration, quantitative evaluation of the time-averaged fringe pattern is desired. A quantitative evaluation procedure based on the phase-shifting technique used in two beam interferometry has also been adopted for this application with some modification. The existing procedure requires a large number of frames to be recorded for implementation. We propose a procedure that will reduce the number of frames required for the analysis. The TV holographic system used and the experimental results obtained with it on an edge-clamped, sinusoidally excited square aluminium plate sample are discussed.
- OSTI ID:
- 22036377
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 16 Vol. 48; ISSN 0003-6935; ISSN APOPAI
- Country of Publication:
- United States
- Language:
- English
Similar Records
Time average vibration fringe analysis using Hilbert transformation
Industrial applications of holographic and speckle measuring techniques; Proceedings of the Meeting, The Hague, Netherlands, Mar. 12, 13, 1991
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Journal Article
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Wed Oct 20 00:00:00 EDT 2010
· Applied Optics
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OSTI ID:22036541
Industrial applications of holographic and speckle measuring techniques; Proceedings of the Meeting, The Hague, Netherlands, Mar. 12, 13, 1991
Conference
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Mon Dec 31 23:00:00 EST 1990
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OSTI ID:5818593
Optics in engineering measurement; Proceedings of the Meeting, Cannes, France, December 3-6, 1985
Conference
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Tue Dec 31 23:00:00 EST 1985
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OSTI ID:6865262