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Printed capacitive sensors for contactless ice detection in automotive liquid conveyor pipes

: Happel, J.; Döring, J.; Krieger, K.-L.; Deitschun, J.; Godlinski, D.

AMA Service GmbH, Wunstorf:
AMA Conferences 2017. Proceedings : Nuremberg Exhibition Centre, Germany, 30.5.-1.6.2017; Proceedings; SENSOR 2017, 18th International Conference on Sensors and Measurement Technology, IRS² 2017, 15th International Conference on Infrared Sensors & Systems; CD-ROM
Wunstorf: AMA Service, 2017
ISBN: 978-3-9816876-4-4
International Conference on Sensors and Measurement Technology (SENSOR) <18, 2017, Nuremberg>
International Conference on Infrared Sensors & Systems (IRS2) <15, 2017, Nuremberg>
Fraunhofer IFAM ()
kapazitiver sensor; Bedrucken; Transportsystem; Gefrierpunkt; Speiseleitung; Polymer; Permittivität; Sensorsystem; Messprinzip

This publication focuses on the development of an innovative, low-cost sensor for the detection of ice formation in conveyor pipes of vehicles. The measurement principle is based on the contactless determination of the relative permittivity of a medium by capacitive sensors. In comparison to water, ice has a decreased relaxation frequency through crystallization below the freezing point. Capacitive sensor structures for permittivity measurement were applied on a polymer pipe by functional printing, which can be installed in the conveying systems in the area of the feed lines. Due to its low-cost and universal design, the sensor can be used in all applications where the integrability and costs of an installed sensor system play a major role.