Flexible tactile sensor based on liquid metal magnetorheological elastomer
Flexible tactile sensor is an important component of wearable devices and machine haptic systems.A piezoresistive material,liquid metal-filled magneto-rheological elastomer(LMMRE)is prepared by filling magneto-rheological elastomer(MRE)with liquid metal Eutectic(EGaIn),and a flexible tactile sensor is designed using this material.The exploration of the electrode process for sensor electrode layer is introduced and a one-piece curing electrode process is proposes.The research shows that the preparation proeess of tactile sensor based on one-piece curing electrode process is simple,low cost and has high sensitivity and small hysteresis error.Since the melting point of the filled substrate material EGaIn is 15.5℃,the change of EGaIn stiffness at low temperature will affect the piezoresistive characteristics.Effect of temperature change on sensor performance is investigated,which provides experimental data for sensor structuring and temperature compensation design.
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