Self-powered stretchable strain sensors for motion monitoring and wireless control
Self-powered stretchable strain sensors for motion monitoring and wireless control
复制标题
用于运动监测和无线控制的自供电可拉伸应变传感器
DOI：
10.1016/j.nanoen.2021.106754
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发表时间：
2021-12-03
期刊：
影响因子：
17.6
通讯作者：
Li, Run-Wei
中科院分区：
文献类型：
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作者：
Li, Shengbin;Cao, Pengjuan;Li, Run-Wei
配备用于运动检测的应变传感器的智能皮肤和智能纺织品对于个性化健康监测、生活方式和健身应用具有重要意义。然而，这些设备对有线电源和刚性电池的依赖限制了它们在日常环境中的使用。在这里，我们报告自供电和高弹性应变传感器承受拉伸到200%，用于监测人体运动。该传感器基于缠绕在弹性管上的扭转弹簧形状的液态金属线圈，并配备了一小块磁环。在应变传感器的机械变形时，当线圈暴露于磁环的时变磁场时，依靠电磁感应的法拉第定律，从身体运动中收集能量。最大短路电流为2 mA，这是远远高于以前的工作，我们的设备的峰值功率为20 μ W，足够高，以驱动传统的低功耗电子器件。我们展示了我们的传感器的应用潜力，可穿戴电子产品监测运动的手臂和腿在健身锻炼和骑自行车。该传感器可以测量手指和手腕的运动，用于健康应用，并建立机器人手的无线控制。
Smart skins and smart textiles equipped with strain sensors for motion detection are of prime significance for personalized health monitoring, lifestyle and fitness applications. Yet, the dependence of these devices on wired power supplies and rigid batteries limits their use in everyday settings. Here, we report self-powered and highly elastic strain sensors withstanding stretching to 200% for monitoring the human motion. The sensor is based on a torsional-spring-shaped coil of liquid metal wound around an elastomeric tubing and equipped with a tiny piece of a magnetic ring. The energy is harvested from the body motion relying on the Faraday's law of electromagnetic induction when the coil is exposed to a time-varying magnetic field of the magnetic ring upon the mechanical deformation of the strain sensor. The max short-circuit current is 2 mA, which is much higher than previous work, and the peak power of our device is 20 mu W, sufficiently high to drive conventional low-power electronics. We demonstrate the application potential of our sensor for wearable electronics for monitoring the motion of arms and legs during fitness workout and riding bicycle. The sensor can measure motion of fingers and wrist for health applications and establish wireless control of robotic hands.