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

Sensors

Nghia Trong Dinh²  Olfa Kanoun¹ 

[1] Electrical Measurements and Sensor Technology, Technische Universität Chemnitz, Reichenhainer Str. 70, Chemnitz 09126, Germany; E-Mail

关键词: carbon nanotubes;    multi-walled carbon nanotubes;    epoxy;    composite;    force sensor;    pressure sensor;    electrical response;    thermal response;    temperature compensation;   

DOI  :  10.3390/s150511133

来源: mdpi

【 摘 要 】

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 50 N can be resolved. The measurement error due to the temperature influence is 150 N in a temperature range of −20°C−50°C.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.