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Temperature compensation in CNT-composite distributed strain sensors

Sundararaman, V and Rathod, VT and Mahapatra, Roy D (2015) Temperature compensation in CNT-composite distributed strain sensors. In: Conference on Smart Sensor Phenomena, Technology, Networks, and Systems Integration, MAR 09-10, 2015, San Diego, CA.

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Official URL: http://dx.doi.org/ 10.1117/12.2175489

Abstract

A temperature compensation method is proposed for CNT-composite strain sensors. CNT-composite sensors are fabricated on an elastic polymer substrate having known thermo-mechanical properties to introduce thermo-mechanical strain and further calibration of the sensor. Strain is induced on the sensor by bending the substrate as a cantilever configuration. Response of the sensor is measured using a bridge circuit method. Induced strain in the beam is determined using beam theory. The sensors are characterized for different CNT concentrations and at various temperatures. A model based temperature compensation scheme is proposed and verified experimentally. The result proves the ability of CNT-nanocomposite strain sensors to be used under varying temperature applications. A method is proposed to determine the strain and temperature simultaneously. The CNT sensors are simple to fabricate in complex patterns with excellent repeatability and do not require bonding layer.

Item Type: Conference Proceedings
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Additional Information: Copy right for this article belongs to the SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
Keywords: Nanocomposite; CNT; temperature compensation; strain sensor; gauge factor; distributed sensing; piezoresistive
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 19 Jul 2015 09:29
Last Modified: 19 Jul 2015 09:29
URI: http://eprints.iisc.ernet.in/id/eprint/51848

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