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Sensors and Materials, Volume 29, Number 7(1) (2017)
Copyright(C) MYU K.K. All Rights Reserved.
Online Published: July 12, 2017
Elastic Capacitive Tactile Array Pressure Sensor System
Hsing-Cheng Yu, Chun-Lin Cheng, Pai-Hao Wu, and Szu-Ju Li
(Received March 1, 2016; Accepted March 10, 2017)
Keywords: capacitive array, crosstalk, multipoint measurement, pressure sensor, tactile sensor
Currently, pressure sensors with large areas often use array elements to achieve tactile measurements. Large-area tactile sensors always feature array-type elements connected by wires in series to accomplish extensive ranges of measurements. However, unnecessary noise is generated in the sensors; crosstalk especially is caused by undesired capacitive coupling from array-type element circuits. A grounding method for an elastic capacitive tactile array pressure sensor system (ECTAPSS) is presented in this study to reduce the crosstalk effect of parasitic capacitance. When the capacitive changes influenced by the crosstalk in the floating circuit exceeded 10 fF, the crosstalk effect of the ECTAPSS could be reduced by more than 50%. Multipoint measurements of the ECTAPSS were achieved at the same time, and the applied pressures of the ECTAPSS were varied in the range between 0.211 and 0.306 kg/cm2. Finally, various applied pressure values of the ECTAPSS were measured accurately in multipoint measurements and have been tested and verified under different experimental conditions.
Corresponding author: Hsing-Cheng Yu
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