Electronics Laboratory, ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland.
Lab Chip. 2017 Sep 26;17(19):3272-3278. doi: 10.1039/c7lc00735c.
A wireless on-skin inertial sensor based on free-moving liquid metal is introduced. The inertial sensor comprises a eutectic gallium-indium (eGaIn) droplet that modulates the capacitance between two electrodes. The capacitive output of the sensor is connected to a planar coil to form an LC resonator whose resonant frequency can be read out wirelessly. Liquid metal electrodes and the coil are fabricated on a 20 μm thick silicone membrane, which can stretch up to 600%, using spray-deposition of eGaIn. The moving droplet is encapsulated on the opposite side of the membrane using spray-deposition of Dragon Skin 10 silicone. The output characteristics, electrical simulations of the capacitance, and dynamic characteristics of the sensor are shown. The sensor is used for measuring tilt angles and recording arm gestures.
本文介绍了一种基于自由运动液态金属的无线体上惯性传感器。该惯性传感器由共晶镓铟（eGaIn）液滴调制两个电极之间的电容组成。传感器的电容输出连接到平面线圈，形成 LC 谐振器，其谐振频率可以无线读取。液态金属电极和线圈通过 eGaIn 的喷涂沉积在 20 μm 厚的硅树脂膜上制造，该硅树脂膜最大可拉伸至 600%。使用喷涂沉积的 Dragon Skin 10 硅树脂将运动中的液滴封装在膜的另一侧。展示了传感器的输出特性、电容的电气模拟以及传感器的动态特性。该传感器用于测量倾斜角度和记录手臂运动。
