A paper-based self-inductive folding displacement sensor for human respiration and motion signals measurement  

作　　者：Junwen Zhu Yanshen Jia Mengmeng Li Zhanxuan Zhou Yinghao Chen Qiang Liu Xing Yang 

机构地区：[1]The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument,Tsinghua University,Beijing 100084,China [2]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [3]School of Electromechanical and Automobile Engineering,Yantai University,Yan Tai 264005,China [4]Key Laboratory of Photonic Control Technology,Ministry of Education,Tsinghua University,Beijing 100083,China

出　　处：《npj Flexible Electronics》2022年第1期653-663,共11页npj-柔性电子（英文）

基　　金：supported by National Natural Science Foundation of China Project (No.52075291,61671271 and 51735007).

摘　　要：Flexible sensors have recently attracted much attention for potential applications in motion measurement and wearable health monitoring.In this paper,an environment-friendly,economic,and high-performance paper-based self-inductive folding displacement sensor(PSIFS)was proposed,with displacement resolution of 20μm and wide measurement range of 43.2 mm.The sensor sensitivity could reach 4.44%mm^(−1) with the maximum deviation of 0.00904 in experiments.The sensing mechanism based on inductance variation due to three-dimensional deformation of planar inductor coil and structural design principle under two dimensions of sensitivity and size were proposed and studied.The folding method to enhance sensitivity was proposed and 3 times sensitivity enhancement could be achieved by once folding.Multiple breathing states and motion states of the human joints could be recognized.The proposed simple paper-based sensor,folding method to increase sensitivity,and structural design model may provide a way for the research of flexible sensors.

关 键 词：FOLDING INDUCTIVE MOTION 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]