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Proceedings Paper

Distributed sensor for rectangular plates
Author(s): Sean Poh; Amr M. Baz
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Paper Abstract

A new class of distributed sensors is presented which can measure both the linear, angular deflections and twist of flat composite plates. The sensor relies in its operation on a set of wires which are embedded off the neutral planes of the composite plates. The wires are arranged in a special manner which allows continuous monitoring of the deflection curve of the plate. The output signals of the wires are processed to determine the linear, angular displacements and twist at critical discrete points in the plate. The equations governing the operation of the sensor are developed using the theory of finite elements. The resulting equations provide the sensor with unique interpolation capabilities which make it possible to map the deflection and strain fields over the entire surface of the plate. The theoretical and experimental performance of the sensor are presented in both the time and frequency domains. Comparisons are given between the experimental performance of the distributed sensor and that of conventional laser sensors in order to demonstrate the accuracy and merits of the distributed sensors. The results obtained suggest the potential of this new class of sensors as a viable means for monitoring the static and dynamic deflections of flexible composite SMART plate.

Paper Details

Date Published: 30 May 1996
PDF: 19 pages
Proc. SPIE 2718, Smart Structures and Materials 1996: Smart Sensing, Processing, and Instrumentation, (30 May 1996); doi: 10.1117/12.240876
Show Author Affiliations
Sean Poh, Catholic Univ. of America (United States)
Amr M. Baz, Catholic Univ. of America (United States)

Published in SPIE Proceedings Vol. 2718:
Smart Structures and Materials 1996: Smart Sensing, Processing, and Instrumentation
Kent A. Murphy; Dryver R. Huston, Editor(s)

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