ABSTRACT

Multifunctional motion sensors have broad applications in the field of the internet of things (IoT). An octopus-shaped self-powered motion sensor is proposed to monitor the acceleration, motion direction, rotation speed and angle of objects. The charge transfer analysis of the sensor is carried out based on the positive piezoelectric effect, contact electrification effect and electrostatic induction. The influence of the surface microstructure and doping ZnO on the sensor sensitivity is investigated, and the improved film increases the sensor sensitivity by 13.58%. It is found that the output voltage decreases as the frequency increases. At the same frequency, the sensor output voltage amplitude is proportional to the acceleration amplitude. The test results show that the sensor can identify the motor rotation speed and angle, and the linear running direction and the motion state of the sweeping robot. Furthermore, the proposed sensor is cheap and beneficial for large-scale use.

摘要

多功能运动传感器在物联网（IoT）领域有着广泛的应用。提出了一种章鱼形自供电运动传感器，用于监测物体的加速度、运动方向、旋转速度和角度。基于正压电效应、接触带电效应和静电感应对传感器进行电荷转移分析。研究了表面微结构和掺杂ZnO对传感器灵敏度的影响，改进后的薄膜使传感器灵敏度提高了13.58%。发现输出电压随着频率的增加而降低。在相同频率下，传感器输出电压幅值与加速度幅值成正比。测试结果表明，传感器可以识别电机的转速和角度，以及扫地机器人的直线运行方向和运动状态。此外，所提出的传感器便宜且有利于大规模使用。