Wang Zhihua, Zhang Fengduo, Yao Tao, Li Na, Li Xia, Shang Jianfeng
State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China.
Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin 300130, China.
Sensors (Basel). 2020 Sep 1;20(17):4947. doi: 10.3390/s20174947.
Rotation detection is widely applied in industries. The current commonly used rotation detection system adopts a split structure, which requires stringent installation requirements and is difficult to miniaturize. This paper proposes a single-piece self-powered non-contact sensor with an interdigital sensitive layer to detect the rotation of objects. The electric field generated between a polyurethane (PU) film and a polytetrafluoroethylene (PTFE) film is utilized for perceiving the rotation. The surface of the PU film is subjected to wet etching with sulfuric acid to increase the surface area and charge density. Through finite element analysis and experimental testing, the effects of the areas of the sensitive films as well as the horizontal and vertical distances between them on the output voltage are analyzed. Tests are performed on adjustable-speed motors, human arms, and robotic arms. The results show that the sensor can detect the speed, the transient process of rotation, and the swing angle. The proposed rotation sensor has broad application prospects in the fields of mechanical automation, robotics, and Internet of Things (IoT).
旋转检测在工业中有着广泛的应用。当前常用的旋转检测系统采用分体结构，其安装要求苛刻且难以小型化。本文提出一种带有叉指敏感层的一体式自供电非接触传感器，用于检测物体的旋转。利用聚氨酯（PU）薄膜和聚四氟乙烯（PTFE）薄膜之间产生的电场来感知旋转。对PU薄膜表面进行硫酸湿法蚀刻以增加表面积和电荷密度。通过有限元分析和实验测试，分析了敏感薄膜的面积以及它们之间的水平和垂直距离对输出电压的影响。对调速电机、人体手臂和机械臂进行了测试。结果表明，该传感器能够检测速度、旋转的瞬态过程以及摆动角度。所提出的旋转传感器在机械自动化、机器人技术和物联网（IoT）领域具有广阔的应用前景。
