Soft Elastomeric Capacitive Sensor for Structural Health Monitoring

Rácz, Zoltán, Hackney, Eleanor M. and Wood, David (2016) Soft Elastomeric Capacitive Sensor for Structural Health Monitoring. Procedia Engineering, 168. pp. 721-724. ISSN 1877-7058

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Propagation of fractures due to high stress loads are a common cause of structural failure. This paper describes a thin soft elastomeric capacitor (SEC) sensor which can be adhered to structures to monitor strain fields and detect sub-millimeter deformations and fractures. Alterations in a mechanical structure change the geometry of the skin-like parallel plate capacitor sensor and the resulting capacitance change is measured as a change in the resonant frequency of a relaxation oscillator circuit. The sensor system comprising of the SEC sensor, the oscillator circuit and a microcontroller demonstrated its capability to detect millimeter scale stretches.

Item Type: Article
Uncontrolled Keywords: capacitive sensor; soft elastomers; structural health monitoring; relaxation oscillator
Subjects: B800 Medical Technology
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Paul Burns
Date Deposited: 16 Apr 2018 10:44
Last Modified: 01 Aug 2021 08:46

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