A Fiber Optic RF Resonant Cavity Sensor for Strain Sensing-Forrcs

dc.contributor.author Schoenwald, Jeffrey
dc.contributor.author Messinger, Ross
dc.date 2018-02-14T06:14:12.000
dc.date.accessioned 2020-06-30T06:38:09Z
dc.date.available 2020-06-30T06:38:09Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 1991
dc.date.issued 1991
dc.description.abstract <p>A fiber optic vibration and strain sensor described by Rogowski et al [1] implemented a radio frequency (rf) phase locked loop in an optical strain gauge bonded to or embedded in a composite structure. A laser is modulated at radio frequency by a voltage controlled oscillator. The phase delay through the optical fiber transmission line is compared to the source oscillator, and the resulting error signal shifts the oscillator, locking the phase. Strain in the specimen (a composite panel) produces a change in optical phase length in the fiber. Tracking the frequency change gives a measure of the integrated strain transduced into the fiber from the strained panel. Strain level sensitivity on the order of 0.1 microstrains has been reported [1]. However, considerable confusion surrounds the performance of the reported sensor, since noise presumed to arise from cladding/core mode interference and splice reflections makes significant filtering necessary, reducing the bandwidth of the sensor, e.g., increasing the response time to detect strains [2]. This limits vibration control applications.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/1991/allcontent/14/
dc.identifier.articleid 2686
dc.identifier.contextkey 5800346
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1991/allcontent/14
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/59789
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/1991/allcontent/14/1991_Schoenwald_FiberOptic.pdf|||Fri Jan 14 20:06:49 UTC 2022
dc.source.uri 10.1007/978-1-4615-3742-7_14
dc.title A Fiber Optic RF Resonant Cavity Sensor for Strain Sensing-Forrcs
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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