柔性液态金属剪切力传感器  

Flexible Liquid Metal Shear Force Sensor

作　　者：刘英君 张晟泓 吴洁[1] 龚晓波[1] LIU Yingjun;ZHANG Shenghong;WU Jie;GONG Xiaobo(School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《力学季刊》2024年第2期411-418,共8页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(12072198);上海交通大学医工交叉基金(YG2022ZD004)。

摘　　要：使用柔性微管液态金属传感器作为应力测量元件,设计制作了一种剪切力传感器.剪切力传感器由弹性聚二甲基硅氧烷(Polydimethylsiloxane, PDMS)杆件、支撑垫片和柔性微管传感器组成.探讨了剪切力传感器的工作原理以及测量元件的传感机制.弹性PDMS杆件受到剪切力作用后变形,使用剪切力传感器对杆件的剪切角进行测量,并将测量结果与灰度重心法测得的参考值进行对比,系统分析了装配间隙δ、微管布置距离L对测量精度的影响.结果表明:当以弹性PDMS杆件为变形体时,剪切力传感器可在0.004 7~0.038 rad的转角范围内进行有效测量;测量误差随着装配间隙δ的增大而增大,随着微管布置距离L增大而减小.所设计剪切力传感器具有灵敏度高、抗干扰能力强等优点,为剪切力的测量提供了一种新的工具.A shear force sensor is designed and manufactured using a flexible microtubule liquid metal sensor as the stress measurement element.The shear force sensor consists of an elastic PDMS(polydimethylsiloxane)member,a metal support gasket,and a flexible microtubule sensor.The working principle of the shear force sensor and the sensing mechanism of the measuring element are discussed.The shear force sensor is used to measure the shear angle of the PDMS truss members,and the measurement results are compared with the reference values measured by the gray weighted centroid method.The effects of the assemble clearanceδand the microtube arrangement distance L on the measurement accuracy are systematically analyzed.The results show that when the elastic PDMS member is used as the deformation unit,the shear force sensor can work effectively in the shear angle range of 0.0047 rad~0.038 rad.The measurement error increases with the increase of the assemble clearanceδ,and decreases with the increase of the microtubule arrangement distance L.The proposed shear force sensor has the advantages of high sensitivity and strong anti-interference ability,providing a new tool for the measurement of shear force.

关 键 词：液态金属 柔性传感器 剪切力 

分 类 号：O348.2[理学—固体力学]