摘要
为了描述传感器微通道结构对传感器输出特性的影响,本文引入传感器横纵微通道长度关系的参数横纵比,综合考虑传感器中垂直和平行于应变方向的微通道中液态金属在应变下的电阻变化规律,建立了镓基液态金属柔性应变传感器数学模型。根据建立的数学模型,优化设计并制备了5种应变传感器样品,在40%应变范围内进行实验。结果表明本文建立的数学模型可以良好地预测不同微通道结构传感器的输出,并为设计优化高灵敏度传感器提供了方向。实验测试结果表明设计的应变传感器在40%应变时的灵敏度为2.01、滞后度为5.1%,且重复性和输出稳定性较高。将设计的传感器用于手指、手肘的关节运动检测,探索了镓基液态金属柔性应变传感器在关节运动检测方面的应用。本文为镓基液态金属柔性应变传感器在可穿戴领域中的应用提供了理论支持。
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.
作者
孙英
汪忠晟
韩智昊
刘卫朋
Sun Ying;Wang Zhongsheng;Han Zhihao;Liu Weipeng(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300401,China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin 300401,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2023年第1期16-26,共11页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(62073118)
河北省省级科技计划(E2017202035)
河北省省级科技计划(E2022202067)项目资助
关键词
柔性应变传感器
镓基液态金属
数学模型
可穿戴
flexible strain sensor
gallium-based liquid metal
mathematical model
wearable
