A novel high-sensitivity, low-power, liquid crystal temperature sensor

Algorri Genaro, José Francisco; Urruchi del Pozo, Virginia; Bennis, Noureddine y Sánchez Pena, José Manuel (2014). A novel high-sensitivity, low-power, liquid crystal temperature sensor. "Sensors", v. 14 (n. 4); pp. 6571-6583. ISSN 1424-8220. https://doi.org/10.3390/s140406571.

Descripción

Título: A novel high-sensitivity, low-power, liquid crystal temperature sensor
Autor/es:
  • Algorri Genaro, José Francisco
  • Urruchi del Pozo, Virginia
  • Bennis, Noureddine
  • Sánchez Pena, José Manuel
Tipo de Documento: Artículo
Título de Revista/Publicación: Sensors
Fecha: Abril 2014
Volumen: 14
Materias:
Palabras Clave Informales: Temperature sensors; liquid crystals; microstructure
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Tecnología Fotónica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A novel temperature sensor based on nematic liquid crystal permittivity as a sensing magnitude, is presented. This sensor consists of a specific micrometric structure that gives considerable advantages from other previous related liquid crystal (LC) sensors. The analytical study reveals that permittivity change with temperature is introduced in a hyperbolic cosine function, increasing the sensitivity term considerably. The experimental data has been obtained for ranges from −6 °C to 100 °C. Despite this, following the LC datasheet, theoretical ranges from −40 °C to 109 °C could be achieved. These results have revealed maximum sensitivities of 33 mVrms/°C for certain temperature ranges; three times more than of most silicon temperature sensors. As it was predicted by the analytical study, the micrometric size of the proposed structure produces a high output voltage. Moreover the voltage’s sensitivity to temperature response can be controlled by the applied voltage. This response allows temperature measurements to be carried out without any amplification or conditioning circuitry, with very low power consumption.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Comunidad de MadridS2009/ESP-1781Sin especificarSin especificarSin especificar
Gobierno de EspañaTEC2009-13991-C02-01Sin especificarSin especificarSin especificar

Más información

ID de Registro: 37395
Identificador DC: http://oa.upm.es/37395/
Identificador OAI: oai:oa.upm.es:37395
Identificador DOI: 10.3390/s140406571
URL Oficial: http://www.mdpi.com/1424-8220/14/4/6571
Depositado por: Memoria Investigacion
Depositado el: 05 Oct 2015 18:21
Ultima Modificación: 05 Oct 2015 18:21
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