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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 26198–26208

Vibration frequency measurement using a local multithreshold technique

Belen Ferrer, Julian Espinosa, Ana B. Roig, J. Perez, and D. Mas  »View Author Affiliations


Optics Express, Vol. 21, Issue 22, pp. 26198-26208 (2013)
http://dx.doi.org/10.1364/OE.21.026198


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Abstract

In this paper, we demonstrate the use of a video camera for measuring the frequency of small-amplitude vibration movements. The method is based on image acquisition and multilevel thresholding and it only requires a video camera with high enough acquisition rate, not being necessary the use of targets or auxiliary laser beams. Our proposal is accurate and robust. We demonstrate the technique with a pocket camera recording low-resolution videos with AVI-JPEG compression and measuring different objects that vibrate in parallel or perpendicular direction to the optical sensor. Despite the low resolution and the noise, we are able to measure the main vibration modes of a tuning fork, a loudspeaker and a bridge. Results are successfully compared with design parameters and measurements with alternative devices.

© 2013 Optical Society of America

OCIS Codes
(040.7290) Detectors : Video
(100.2000) Image processing : Digital image processing
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 3, 2013
Revised Manuscript: October 10, 2013
Manuscript Accepted: October 11, 2013
Published: October 24, 2013

Citation
Belen Ferrer, Julian Espinosa, Ana B. Roig, J. Perez, and D. Mas, "Vibration frequency measurement using a local multithreshold technique," Opt. Express 21, 26198-26208 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-22-26198


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References

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