Modelling and measurement of buckypaper-based strain/tactile sensors
Date Issued
2014
Date
2014
Author(s)
Hsu, Li-Sheng
Abstract
In this paper, we present the modelling and measurement of a buckypaper-based strain/tactile sensor. The proposed modeling results can be used for designing buckypaper-base tactile sensors and strain sensors, and estimating the resistance changes of the sensing elements on the devices. Various buckypaper-based sensors, as well as the studies on the properties of buckypaper, have been presented. However, the modelling of buckypaper for explaining the behavior under strain has not be reported. In this work, the previously-published resistance models of buckypaper is extended to describe the piezoresistive behaviors of buckypaper. The resistance model is derived by using the carbon nanotubes (CNTs) junction density theory and the structural mechanics theory. The proposed model, which gives the relationship between resistance change and strain, was expressed analytically with the parameters such as device dimensions and material properties. Three of buckypaper-based sensor were measured and calculated. The cantilever beam was served as strain sensors and the double-calm beam was served as tactile sensors. The results predicted by the model were validated by the measured results. While force applied to sensors is smaller than 1N, the analytical results follow the measured results very well. As the applied force is larger than 1N, the analytical results deviate from the measured results, while follow the similar trend of measured results.
Subjects
巴克紙
奈米碳管
電阻
應變感測器
觸覺感測器
Type
thesis
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