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Proceedings Paper

Integrated wireless piezoelectric sensors
Author(s): Elmar Ihler; Helmut W. Zaglauer; Ursula Herold-Schmidt; Kay W. Dittrich; Werner Wiesbeck
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Paper Abstract

Piezoelectric sensor arrays and sensor networks have been suggested as a means to monitor the integrity of composite structures throughout the service life for instance of an aircraft. Complex sensor systems will require significant additional expenditures with respect to cabling and electronics, with the added weight and effort possibly outweighing any benefits. Sensor positions in remote locations of an aircraft will often necessitate accessibility to these locations for maintenance purposes. For these reasons wireless, integrated sensors have recently become an object of increasing interest. Within the framework of a feasibility study various aspects of integrated wireless sensor system were investigated in detail. Particular emphasis was thereby laid on issues that are essential form a practical point of view, but that have not been discussed in the literature extensively. As a starting point a trade-off study between different sensor network configurations was conducted, form passive, remotely queried senors without power supply to fully functional active sensor pads with integrated power supply and electronics. Various concepts for the on-board energy supply of remotely queried sensor pads were studied and a comparison between rechargeable, and single-use batteries was performed. The suitability of different electronic components for integration into carbon fiber composites was investigated with particular emphasis on their survivability under typical temperature cycles experienced in autoclave runs. Finally, a crackwire sensor as an example of a passive remotely queried sensor system was pursued further in order to show the feasibility of such a wireless system for composite health monitoring purposes.

Paper Details

Date Published: 12 June 2000
PDF: 8 pages
Proc. SPIE 3991, Smart Structures and Materials 2000: Industrial and Commercial Applications of Smart Structures Technologies, (12 June 2000); doi: 10.1117/12.388186
Show Author Affiliations
Elmar Ihler, DaimlerChrysler Aerospace Dornier (Germany)
Helmut W. Zaglauer, DaimlerChrysler Aerospace Dornier (Germany)
Ursula Herold-Schmidt, DaimlerChrysler Aerospace Dornier (Germany)
Kay W. Dittrich, DaimlerChrysler Aerospace (Germany)
Werner Wiesbeck, Univ. of Karlsruhe (Germany)

Published in SPIE Proceedings Vol. 3991:
Smart Structures and Materials 2000: Industrial and Commercial Applications of Smart Structures Technologies
Jack H. Jacobs, Editor(s)

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