The development of electronic skin,soft robots,and smart wearables has significantly driven advances in flexible pressure sensing technology.However,traditional multilayer solid-structure flexible pressure sensors enc...The development of electronic skin,soft robots,and smart wearables has significantly driven advances in flexible pressure sensing technology.However,traditional multilayer solid-structure flexible pressure sensors encounter challenges at temperatures between 100°C and 150°C due to high-temperature modal distortion.Changes in the conductivity of the sensor’s conductive components interfere with accurate pressure measurement.In this research,a flexible pressure sensor with a convective liquid metal sensitive layer is proposed.The sensor uses a cyclic self-cooling mechanism to lower the temperature of its conductive components,reducing the impact of external high temperatures on the pressure measurement accuracy.At a 2.8 W thermal load,the flexible sensor,with liquid metal circulating at 2.0 mL/min,exhibits a sensitivity of 0.11 kPa⁻¹within the pressure range from 0 to 12.5 kPa,and its maximum measurable pressure is 30 kPa.In addition,the resistance of the sensor is 18.5 mΩless than that of a stationary liquid metal sensor,representing a 38.1%reduction.The sensor proposed in this research introduces a novel strategy for pressure measurement in high-temperature applications,extending the application scope to aircraft,special robots,and hydraulic oil circuits.展开更多
基金the support of the Natural Science Foundation of Anhui Province(2108085QE226)Anhui Future Technology Research Institute Industry Guidance Fund Project(2023ccyd01)+1 种基金National Natural Science Foundation of China(No.12472257)National Key Research and Development Program of China Stem Cell and Translational Research(2022YFB4600600).
文摘The development of electronic skin,soft robots,and smart wearables has significantly driven advances in flexible pressure sensing technology.However,traditional multilayer solid-structure flexible pressure sensors encounter challenges at temperatures between 100°C and 150°C due to high-temperature modal distortion.Changes in the conductivity of the sensor’s conductive components interfere with accurate pressure measurement.In this research,a flexible pressure sensor with a convective liquid metal sensitive layer is proposed.The sensor uses a cyclic self-cooling mechanism to lower the temperature of its conductive components,reducing the impact of external high temperatures on the pressure measurement accuracy.At a 2.8 W thermal load,the flexible sensor,with liquid metal circulating at 2.0 mL/min,exhibits a sensitivity of 0.11 kPa⁻¹within the pressure range from 0 to 12.5 kPa,and its maximum measurable pressure is 30 kPa.In addition,the resistance of the sensor is 18.5 mΩless than that of a stationary liquid metal sensor,representing a 38.1%reduction.The sensor proposed in this research introduces a novel strategy for pressure measurement in high-temperature applications,extending the application scope to aircraft,special robots,and hydraulic oil circuits.
