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Proceedings Paper

Dielectric elastomer cantilever beam sensor
Author(s): Na Ni; Ling Zhang; Jinxiong Zhou; Yin Wang; Fan Liu
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Paper Abstract

Dielectric elastomer sensors are a recent type of mechanical sensors utilized to detect forces, pressures and deformations. The sensors have several advantages compared with traditional sensors including high elasticity, capacitive sensing and inexpensive fabrication. In this paper, a new sensing device for measuring small concentrated force is proposed. The device deploys the dielectric membrane on the surface of cantilever beam of constant strength. The dielectric membrane is a capacitance sensor built with dielectric polymer coated with soft electrodes. The change in strain arising from the cantilever beam with concentrated force at free end can be quickly transferred to the dielectric membrane. The strain variation of the dielectric membrane induces the change in the capacitance of the membrane. Tests on the device show that the concentrated force at the free end of the cantilever beam is approximately proportional to the change in the capacitance. According to the relation, the unknown concentrated force can be obtained accurately by measuring the change in the capacitance of the dielectric membrane. The new device is capable of monitoring small concentrated force with prominent sensitivity.

Paper Details

Date Published: 8 March 2014
PDF: 7 pages
Proc. SPIE 9056, Electroactive Polymer Actuators and Devices (EAPAD) 2014, 90561M (8 March 2014); doi: 10.1117/12.2045054
Show Author Affiliations
Na Ni, Xi'an Jiaotong Univ. (China)
Ling Zhang, Xi'an Jiaotong Univ. (China)
Jinxiong Zhou, Xi'an Jiaotong Univ. (China)
Yin Wang, Xi'an Jiaotong Univ. (China)
Fan Liu, Xi'an Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 9056:
Electroactive Polymer Actuators and Devices (EAPAD) 2014
Yoseph Bar-Cohen, Editor(s)

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