Publication:
Modal liquid crystal temperature sensor

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URI: https://hdl.handle.net/10016/28793
ISBN: 978-1-4799-0161-6
DOI: https://doi.org/10.1109/ICSENS.2014.6985416
UXXI: CC/0000023245
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modal_IEEE-SENSORS_2014_ps.pdf (382.52 KB)
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2014-12-15
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IEEE
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Abstract
In this work, a novel liquid crystal temperature sensor is proposed. This sensor is composed by only two electrodes. A simple and easily scalable structure uses the temperature dependence of the liquid crystal permittivity as the sensing magnitude. The sensor has a high sensitivity, low voltage control, low power consumption and high linearity. The analytical modelling allows an optimization of the structure, in terms of sensitivity. Several liquid crystal has been investigated. The response improves the characteristics of previous LC sensors and even some commercial sensors (e.g. 60 mV/°C for 10 V rms of applied voltage, six times more than of most silicon temperature sensors).
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Proceeding of: 2014 IEEE SENSORS proceedings: Valencia, Spain, November 2-5, 2014.
Keywords
Sensitivity, Permittivity, Electrodes, Temperature sensors, Temperature measurement, Voltage measurement
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IEEE SENSORS proceedings: Valencia, Spain, November 2-5, 2014. USA: IEEE, cop. 2014, pp. 1960-1963.
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