Design optimization and experimental validation of the gallium-based liquid metal flexible strain sensor

被引：0
作者：
Sun Y. [1 ,2 ]
Wang Z. [1 ,2 ]
Han Z. [1 ,2 ]
Liu W. [1 ,2 ]
机构：
[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin
[2] Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2023年 / 44卷 / 01期
关键词：
flexible strain sensor; gallium-based liquid metal; mathematical model; wearable;
D O I：
10.19650/j.cnki.cjsi.J2210618
中图分类号：
学科分类号：
摘要：
To describe the influence of the sensor microchannel structure on the output characteristics of the sensor, the relationship parameter of the sensor transverse and longitudinal microchannel length is introduced in this article. A mathematical model of gallium-based liquid metal flexible strain sensor is formulated by comprehensively considering the resistance change law of the liquid metal in the microchannels which are parallel and perpendicular to the strain direction in the sensor. According to the developed mathematical model, five strain sensor samples are optimized and prepared to perform the experiments within 40% strain range. The results show that the mathematical model developed in this article can well predict the output of sensors with different microchannel structures, and provide directions for the design and optimization of high sensitivity sensors. Experimental tests show that the designed strain sensor has a sensitivity of 2. 01, a hysteresis of 5. 1% at 40% strain, and a high reproducibility and output stability. The designed sensor is used for joint motion detection in the finger and elbow, exploring the application of gallium-based liquid metal flexible strain sensor in joint motion detection. This article provides theoretical support for the application of gallium-based liquid metal flexible strain sensors in the wearable field. © 2023 Science Press. All rights reserved.
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页码：16 / 26
页数：10
相关论文
共 27 条
[1]  
LIU J, LIU M, BAI Y, Et al., Recent progress in flexible wearable sensors for vital sign monitoring, Sensors, 20, 14, (2020)
[2]  
GAO W, OTA H, KIRIYA D, Et al., Flexible electronics toward wearable sensing, Accounts of Chemical Research, 52, 3, pp. 523-533, (2019)
[3]  
MATSUZAKI R, TABAYASHI K., Highly stretchable, global, and distributed local strain sensing line using gainsn electrodes for wearable electronics, Advanced Functional Materials, 25, 25, pp. 3806-3813, (2015)
[4]  
CHOI D Y, KIM M H, OH Y S, Et al., Highly stretchable, hysteresis-free ionic liquid-based strain sensor for precise human motion monitoring, ACS Applied Materials & Interfaces, 9, 2, pp. 1770-1780, (2017)
[5]  
MENCARINI E, RAPP A, TIRABENI L, Et al., Designing wearable systems for sports: A review of trends and opportunities in human-computer interaction, IEEE Transactions on Human-Machine Systems, 49, 4, pp. 314-325, (2019)
[6]  
LI F L, LI SH B, CAO J W, Et al., Elastic sensitive materials and sensors, Materials Reports, 34, 1, pp. 1059-1068, (2020)
[7]  
LIU H, LI Q, ZHANG S, Et al., Electrically conductive polymer composites for smart flexible strain sensors: A critical review, Journal of Materials Chemistry C, 6, 45, pp. 12121-12141, (2018)
[8]  
YEE M J, MUBARAK N M, ABDULLAH E C, Et al., Carbon nanomaterials based films for strain sensing application—A review, Nano-Structures & Nano-Objects, 18, (2019)
[9]  
CHIECHI R C, WEISS E A, DICKEY M D, Et al., Eutectic gallium-indium (EGaIn): A moldable liquid metal for electrical characterization of self-assembled monolayers, Angewandte Chemie International Edition, 47, 1, pp. 142-144, (2008)
[10]  
DICKEY M D, CHIECHI R C, LARSEN R J, Et al., Eutectic gallium-indium (EGaIn): A liquid metal alloy for the formation of stable structures in microchannels at room temperature, Advanced Functional Materials, 18, 7, pp. 1097-1104, (2008)
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