Fiber optic Sagnac interferometer for on-line acoustic emission monitoring of high-temperature power plant structures

Tom Carolan, R. L. Reuben, James S. Barton, Julian D. Jones

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper details the design of a non-contact fiber optic sensor for the detection of acoustic emission for structural integrity monitoring in high temperature power plant applications. The sensor is based on a Sagnac interferometer and produces an output proportional to target velocity, without the need for active phase stabilization. It is inherently insensitive to low frequency perturbations of the instrument or the target and incorporates an environmentally insensitive downlead which may be of arbitrary length. It is shown that the sensor is capable of meeting the specifications for structural integrity monitoring of high temperature power plant components based on acoustic emission detection and has a velocity resolution of 50 nms-1Hz- 1/2 .

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages530-539
Number of pages10
Volume2868
Publication statusPublished - 1996
EventSecond International Conference on Vibration Measurements by Laser Techniques: Advances and Applications - Washington, DC, USA
Duration: 23 Sep 199625 Sep 1996

Conference

ConferenceSecond International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
CityWashington, DC, USA
Period23/09/9625/09/96

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  • Cite this

    Carolan, T., Reuben, R. L., Barton, J. S., & Jones, J. D. (1996). Fiber optic Sagnac interferometer for on-line acoustic emission monitoring of high-temperature power plant structures. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 2868, pp. 530-539)