Wu Zhiyi, Ding Wenbo, Dai Yejing, Dong Kai, Wu Changsheng, Zhang Lei, Lin Zhiming, Cheng Jia, Wang Zhong Lin
School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332-0245 , United States.
Engineering Research Center for Mechanical Testing Technology and Equipment of Ministry of Education , Chongqing University of Technology , Chongqing 400054 , China.
ACS Nano. 2018 Jun 26;12(6):5726-5733. doi: 10.1021/acsnano.8b01589. Epub 2018 May 31.
With the fast development of the Internet of Things, the requirements of system miniaturization and integration have accelerated research on multifunctional sensors. Based on the triboelectric nanogenerator, a self-powered multifunctional motion sensor (MFMS) is proposed in this work, which is capable of detecting the motion parameters, including direction, speed, and acceleration of linear and rotary motions, simultaneously. The MFMS consists of a triboelectric nanogenerator (TENG) module, a magnetic regulation module, and an acrylic shell. The TENG module is formed by placing a free-standing magnetic disk (MD) on a polytetrafluorethylene (PTFE) plate with six copper electrodes. The movement of the MFMS causes the MD to slide on the PTFE plate and hence excites the electrodes to produce a voltage output. The carefully designed six copper electrodes (an inner circle electrode, an outer circle electrode, and four arc electrodes between them) can distinguish eight directions of movement with the acceleration and determine the rotational speed and direction as well. Besides, the magnetic regulation module is applied here by fixing a magnetic cylinder (MC) in the shell, right under the center of the PTFE plate. Due to the magnetic attraction applied by the MC, the MD will automatically return to the center to prepare for the next round of detection, which makes the proposed sensor much more applicable in practice.
随着物联网的快速发展，系统小型化和集成化的需求加速了对多功能传感器的研究。基于摩擦纳米发电机，本文提出了一种自供电多功能运动传感器（MFMS），它能够同时检测运动参数，包括直线运动和旋转运动的方向、速度和加速度。MFMS由一个摩擦纳米发电机（TENG）模块、一个磁调节模块和一个丙烯酸外壳组成。TENG模块是通过将一个独立的磁盘（MD）放置在带有六个铜电极的聚四氟乙烯（PTFE）板上形成的。MFMS的运动使MD在PTFE板上滑动，从而激发电极产生电压输出。精心设计的六个铜电极（一个内圆电极、一个外圆电极以及它们之间的四个弧形电极）能够区分八个运动方向并确定加速度，还能确定转速和方向。此外，磁调节模块通过在外壳中PTFE板中心正下方固定一个磁柱（MC）来实现。由于MC施加的磁吸引力，MD会自动回到中心为下一轮检测做准备，这使得所提出的传感器在实际应用中更具适用性。
