Mr. Peng Wang Profile

Peng Wang

at ZheJiang Univ

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Proceedings Article | 22 June 2016 Presentation

Electromechanical behavior of a novel dielectric elastomer sensor for compressive force detection (Conference Presentation)

Junjie Liu, Guoyong Mao, Xiaoqiang Huang, Zhanan Zou, Shaoxing Qu, Peng Wang

Proceedings Volume 9798, 97981X (2016) https://doi.org/10.1117/12.2218769

KEYWORDS: Sensors, Dielectrics, Actuators, Electrodes, Capacitance, Sensor performance, Reliability, Mechanics, Electroactive polymers, Current controlled current source

Read Abstract +

Dielectric elastomers (DEs) have been extensively studied as DE actuators, DE generators, and DE sensors. Compared with DE actuators and generators, DE sensing application has the advantage that it is no need for high voltage. However, to realize the high sensitivity of the DE sensor, a well-designed structure is essential. A typical DE sensor consists of DE membrane covered by compliant electrodes on both sides. Expanding in the area and shrinking in the thickness of DE membrane subjected to external force will lead to the increasement of the capacitance. We propose a novel DE sensor to detect compressive force. The DE sensor consists of three layers. The two layers of outside can penetrate each other to deform the middle layer and achieve high sensitivity for compressive force measurement. This sensor consists of a series of sensor elements made of DE membrane with out-of-plane deformation. Each sensor element experiences highly inhomogeneous large deformation to obtain high sensitivity. We conduct the experiment to optimize the performance of the sensor element, and also the corresponding theoretical analysis is developed. The effects of the prestretches and the aspect ratios of the sensor element on the sensitivity are achieved. The soft sensor composed of a series of such sensor elements may comply with complicated surfaces and can be used to detect both the total value and the distribution of the compressive force exerted on the surface. Furthermore, the reliability of the sensor element is studied by additional experimental investigation. The experiment shows that the sensor element operates steadily after 2000 cyclic loadings. This study provides guidance for the design and performance analysis of soft sensors. This work has been published in the Journal of Applied Mechanics, 82(10), No. 101004 (2015).

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