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 clearance δ and 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 0.004 7 rad～0.038 rad.The measurement error increases with the increase of the assemble clearance δ,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.
万方数据
维普
