Liquid Metal‐Based Strain Sensor with Ultralow Detection Limit for Human–Machine Interface Applications
Liquid Metal‐Based Strain Sensor with Ultralow Detection Limit for Human–Machine Interface Applications
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DOI：
10.1002/aisy.202000235
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发表时间：
2021-05
影响因子：
7.4
通讯作者：
Yuanzhao Wu;Youlin Zhou;W. Asghar;Yiwei Liu;Fali Li;Dandan Sun;Chao Hu;Zhenguang Wu;J. Shan
中科院分区：
文献类型：
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作者：
Yuanzhao Wu;Youlin Zhou;W. Asghar;Yiwei Liu;Fali Li;Dandan Sun;Chao Hu;Zhenguang Wu;J. Shan
柔性应变传感器在人机交互中起着至关重要的作用。尽管它们有巨大的发展，但具有宽应变感测范围、超低检测限和可忽略的滞后的应变传感器仍然是一个挑战。本文报道了一种基于液态金属（LM）的可拉伸电阻应变传感器，该传感器通过选择性润湿和转移工艺制备，以获得LM和聚二甲基硅氧烷衬底之间的改善的相容性。该传感器具有宽应变传感范围（105%）、超低检测限（0.05%）、最小滞后、快速响应时间（58 ms）和出色的重复性。当实际演示时，该传感器成功地监测了各种人类活动，例如眨眼运动监测，语音强度区分，心跳和手腕脉搏监测。此外，当电流传感器以智能膝盖和智能手套的形式使用时，它有效地检测了各种人体手势，这证实了其在人体健康和运动监测、人机接口和虚拟现实应用领域的巨大应用潜力。
Flexible strain sensors play vital role in human–machine interaction. Despite their vast development, a strain sensor having broad strain sensing range, ultralow detection limit, and negligible hysteresis still remains a challenge. Herein, a liquid metal (LM)‐based stretchable resistive strain sensor, prepared by selective wetting and transferring process to attain improved compatibility between LM and polydimethylsiloxane substrate, is reported. This sensor exhibits broad strain sensing range (105%), with ultralow detection limit (0.05%), minimal hysteresis, fast response time (58 ms), and excellent repeatability. When practically demonstrated, this sensor successfully monitored various human activities, such as blink motion monitoring, voice intensity differentiation, heartbeat and wrist pulse monitoring. Moreover, when the current sensor is used in the form of smart kneecap and smart glove, it efficiently detected various human gestures, which confirms its great application potential in the fields of human health and motion monitoring, human–machine interface, and virtual reality applications.