27 March 2015 Temperature compensation in CNT-composite distributed strain sensors
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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.
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V. Sundararaman, V. Sundararaman, V. T. Rathod, V. T. Rathod, D. Roy Mahapatra, D. Roy Mahapatra, "Temperature compensation in CNT-composite distributed strain sensors", Proc. SPIE 9436, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2015, 94360M (27 March 2015); doi: 10.1117/12.2175489; https://doi.org/10.1117/12.2175489
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