Online compensation and calibration of a chromatically addressed, photoelastic strain sensor with optical fibre transmission

Author

Humphries, J. ; Harrison, J.A. ; Spencer, J.W. ; Jones, G.R.

Author_Institution

Dept. of Electr. Eng. & Electron., Liverpool Univ., UK

Volume

143

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

166

Lastpage

170

Abstract

An experimental study has been undertaken into the effects of changes in the spectral content of broadband light used for addressing a photoelastic strain sensor upon the calibration curve of such a transducer. A simple analysis is presented to show how compensation could be provided for random system drifts which produce such spectral variations. This has led to the design of a prototype photoelastic strain sensor with inbuilt compensation means. Some initial results are presented to demonstrate the performance of the transducer

Keywords

calibration; compensation; fibre optic sensors; intelligent sensors; optical modulation; photoelasticity; physical instrumentation control; strain gauges; chromatically addressed; chromaticity calibration curve; compensated transducer unit; fibre optic strain gauge; inbuilt compensation; intelligent operation; on-line compensation; optical fibre transmission; photoelastic strain sensor; prototype sensor design; random system drifts; spectral content of broadband light; structural monitoring;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:19960352

Filename

502433