Recently, the Minimally Invasive Center of the Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences has made new progress in the field of ultra-high stretch flexible sensors. Related papers: Microchannel Structural Design For a Room-Temperature Liquid Metal Based Super-stretchable Sensor ("Research on room temperature liquid metal ultra-high stretchable sensor based on micro-channel structure design") was published online in the journal Scientific Reports (DOI: 10.1038 / s41598-019-42457-7). The paper proposes an optimized design of microchannels to improve the sensitivity of flexible stretchable sensors based on liquid metals. The first author of the paper is Gao Qinwu, a visiting master student of Shenzhen Advanced Institute, and the corresponding authors are researcher Wang Lei and associate researcher Li Hui.
Flexible sensors are hot research topics in wearable medicine, robotics and other fields. Flexible strain sensors have become a key research direction for the development of smart devices in the future, and they have broad application prospects in the fields of human-computer interaction systems, electronic skins, and human motion behavior monitoring systems. Among them, stretchability, sensitivity, stability, reliability and comfort are important performance indicators of strain sensors. How to achieve high stretchability while greatly improving sensitivity and repeatability is still a challenge currently facing .
To this end, members of the research group proposed a method based on optimized design of micro-channels, using flexible flexible sensors made of liquid metal. The research team used the optimization results of finite element simulation to design and prepare a flexible stretchable sensor. The experimental results show that the flexible sensor can work normally under 590% stretching, 270o torsion and 180o bending. When stretching 550%, the sensitivity GF can reach 4.95, and the stretching repetition rate error is less than 0.1%, which provides a feasible method for achieving accurate motion measurement of human fingers, wrists and other joints, and fully demonstrates its application in the field of flexible wearable electronic devices Good application value.
The research was supported by the National Natural Science Foundation of China-Shenzhen Robot Joint Fund's key support project "Strength perception and guide wire manipulation mechanism of wearable precision positioning interventional surgery robot (U1713219)".
Flexible sensor stretching, twisting and bending
Tensile experiment of ultra-high tensile sensor
Characteristic analysis and application demonstration of stretchable sensor
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Hex flange self-drilling screw into sheet metal - with a drill - the advantage is the use without the need for pre-drilling and minimal risk of sheet deformation. Suitable for joining sheets where high joint strength is required.
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