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Proceedings Paper

Application of etched fiber strain gauges to low-cost on-board vehicle load monitoring
Author(s): Beatrys M. Lacquet; Pieter L. Swart; Abraham P. Kotze
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Paper Abstract

We investigated the use of wavelength compensated coupler sensors and etched optical fiber strain sensors to provide an economical on-board load indicator for passenger vehicles. Cost considerations favored the etched fiber sensor. Manufactured sensors were evaluated experimentally by straining them on a cantilever beam. For strain smaller than 600 microstrain the output of a 10 segment sensor was linear with a typical gauge factor of minus 57. Bending losses in the fiber sensor became more pronounced for larger strain. Proper weighting of the outputs of the front and back sensors on the vehicle ensures a monotonic relationship between the sensor output and load. Difference-over-sum processing minimizes the effects of sensitivity to common- mode perturbations such as temperature and source intensity changes.

Paper Details

Date Published: 5 August 1996
PDF: 6 pages
Proc. SPIE 2872, Second Pacific Northwest Fiber Optic Sensor Workshop, (5 August 1996); doi: 10.1117/12.245577
Show Author Affiliations
Beatrys M. Lacquet, Rand Afrikaans Univ. (South Africa)
Pieter L. Swart, Rand Afrikaans Univ. (South Africa)
Abraham P. Kotze, Rand Afrikaans Univ. (South Africa)

Published in SPIE Proceedings Vol. 2872:
Second Pacific Northwest Fiber Optic Sensor Workshop
Eric Udd, Editor(s)

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