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Applied Optics

Applied Optics


  • Vol. 42, Iss. 31 — Nov. 1, 2003
  • pp: 6276–6283

Digital and analog readout systems for fiber-optic strain sensors as applied to the monitoring of roller element bearing systems

Juan C. Juarez, Andrew P. Conkey, Robert X. Perez, and Henry F. Taylor  »View Author Affiliations

Applied Optics, Vol. 42, Issue 31, pp. 6276-6283 (2003)

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A rotating machinery test rig was instrumented with fiber Fabry-Perot interferometer strain sensors for condition monitoring of rolling element bearings. Strain variations produced by ball passes were observed and analyzed in the time and frequency domain. Wavelength division multiplexing was utilized to simultaneously monitor the sensors with analog and digital readout systems—analog for high bandwidth and digital for high dynamic range and the monitoring of multiple sensors. The effects of imbalance on the shaft, changes in rotational speed, effects on the rotor system, and detection of bearing defects were investigated. Frequency peaks observed in the bearing sensor spectra closely matched predicted values. Imbalance and rotational speed tests showed good agreement with expected trends, and bearing defects were successfully detected.

© 2003 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4230) Fiber optics and optical communications : Multiplexing
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis

Original Manuscript: March 13, 2003
Revised Manuscript: July 28, 2003
Published: November 1, 2003

Juan C. Juarez, Andrew P. Conkey, Robert X. Perez, and Henry F. Taylor, "Digital and analog readout systems for fiber-optic strain sensors as applied to the monitoring of roller element bearing systems," Appl. Opt. 42, 6276-6283 (2003)

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