Modal liquid crystal temperature sensor

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 cont...

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Bibliographic Details
Published inIEEE SENSORS 2014 Proceedings pp. 1960 - 1963
Main Authors Algorri, J. F., Lallana, P. C., Urruchi, V., Sánchez-Pena, J. M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2014
Subjects
Electrodes
high resistivity layer
liquid crystal
Permittivity
Sensitivity
Temperature measurement
Temperature sensing
Temperature sensors
Voltage measurement
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Summary: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).
ISSN:1930-0395
2168-9229
DOI:10.1109/ICSENS.2014.6985416