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Sensors 2015, 15(5), 11133-11150; doi:10.3390/s150511133

Temperature-Compensated Force/Pressure Sensor Based on Multi-Walled Carbon Nanotube Epoxy Composites

Electrical Measurements and Sensor Technology, Technische Universität Chemnitz, Reichenhainer Str. 70, Chemnitz 09126, Germany
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Academic Editor: Vittorio M.N. Passaro
Received: 15 February 2015 / Revised: 16 April 2015 / Accepted: 29 April 2015 / Published: 12 May 2015
(This article belongs to the Section Physical Sensors)
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Abstract

In this study, we propose a multi-walled carbon nanotube epoxy composite sensor for force and pressure sensing in the range of 50 N–2 kN. A manufacturing procedure, including material preparation and deposition techniques, is proposed. The electrode dimensions and the layer thickness were optimized by the finite element method. Temperature compensation is realized by four nanocomposites elements, where only two elements are exposed to the measurand. In order to investigate the influence of the filler contents, samples with different compositions were prepared and investigated. Additionally, the specimens are characterized by cyclical and stepped force/pressure loads or at defined temperatures. The results show that the choice of the filler content should meet a compromise between sensitivity, temperature influence and noise behavior. At constant temperature, a force of at least 50N can be resolved. The measurement error due to the temperature influence is 150N in a temperature range of –20°C–50°C. View Full-Text
Keywords: carbon nanotubes; multi-walled carbon nanotubes; epoxy; composite; force sensor; pressure sensor; electrical response; thermal response; temperature compensation carbon nanotubes; multi-walled carbon nanotubes; epoxy; composite; force sensor; pressure sensor; electrical response; thermal response; temperature compensation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dinh, N.T.; Kanoun, O. Temperature-Compensated Force/Pressure Sensor Based on Multi-Walled Carbon Nanotube Epoxy Composites. Sensors 2015, 15, 11133-11150.

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