NDLI: A piezoresistive normal and shear force sensor using liquid metal alloy as gauge material

Content Provider	IEEE Xplore Digital Library
Author	Xiaomei Shi Ching-Hsiang Cheng Chen Chao Like Wang Yongping Zheng
Copyright Year	2012
Description	Author affiliation: Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong (Xiaomei Shi; Ching-Hsiang Cheng) \|\| Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong (Chen Chao; Like Wang; Yongping Zheng)
Abstract	We present a novel normal and shear force sensor by using liquid metal alloy (Ga-In-Sn) as piezoresistive gauge material encapsulated in a polydimethylsiloxane (PDMS) substrate. By using liquid metal alloy as gauge material, it can detect large forces without breaking the sensor wires. Since the liquid-metal piezoresistors deform with the elastomeric substrate, shear and normal forces can be detected with resistance changes of the piezoresistors. Each force sensor comprises a pair of symmetric piezoresistors, which is screen-printed on the cavity of PDMS substrate with tilt angle around 30° to be sensitive to both normal and shear forces. Normal force will compress both piezoresistors as common mode while shear force will shorten one piezoresistor but elongate the other as differential mode. The testing results demonstrate the sensitivity of the force sensor in both normal and shear directions. The hysteresis of the force sensor was also measured.
Starting Page	483
Ending Page	486
File Size	1074858
Page Count	4
File Format	PDF
ISBN	9781467311229
e-ISBN	9781467311243
DOI	10.1109/NEMS.2012.6196822
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-05
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Displacement measurement Force measurement Irrigation Monitoring Materials Biomedical monitoring Biomechanics liquid metal normal and shear force sensor PDMS
Content Type	Text
Resource Type	Article

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