用于物体位置检测的柔性蛇形叉指电极设计  

Design of flexible serpentine interdigitated electrodes for object position detection

作　　者：王建浩 吴炳炜 金明亮 WANG Jianhao;WU Bingwei;JIN Mingliang(School of Automation,Qingdao University,Qingdao 266071,China)

机构地区：[1]青岛大学自动化学院,山东青岛266071

出　　处：《传感器与微系统》2025年第4期65-69,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(52003134);山东省泰山学者项目(tsqn201909099);青岛大学系统科学+联合研究重大项目(XT2024102)。

摘　　要：传统刚性结构的接近传感器具备较高的机械强度和稳定性,但普遍缺乏机械灵活性、可拉伸性和形状适应性。为了优化接近传感器在非规则或曲面物体表面的外部接近感知性能,提出了一种改良型柔性蛇形叉指电极结构的电容式接近传感器,将叉指电极优化为蛇形结构,采用聚对苯二甲酸乙二醇酯(PET)基底和氢化苯乙烯-丁二烯嵌段共聚物(SEBS)封装,银电极印刷于PET表面,形成柔性结构。实验结果表明,该传感器在响应能力、检测范围、稳定性和柔韧性等方面表现优异,使用COMSOL Multiphysics仿真验证了蛇形结构的拉伸性。通过STM32控制器和电容采集模块进行数据采集与处理,实现了传感器在弯曲物体表面对接近物体位置的实时检测,并在上位机中进行了可视化展示。Traditional rigid structure proximity sensors possess high mechanical strength and stability but there is a general lack of mechanical flexibility,stretchability,and shape adaptability.To optimize the external proximity sensing performance of proximity sensors on irregular or object with curved surfaces,a capacitive proximity sensor with a modified flexible serpentine interdigitated electrode structure is proposed.The interdigitated electrodes are optimized as serpentine structure with PET substrate and SEBS encapsulation,and the silver electrodes are printed on the PET surface to form a flexible structure.The experimental results show that the sensor performs well in terms of responsiveness,detection range,stability,and flexibility,and the tensile properties of the serpentine structure are verified by COMSOL Multiphysics simulation.The data acquisition and processing are conducted by the STM32 controller and capacitance acquisition module to realize real-time detection of the position of the approaching object on the surface of the curved object and visualization display is carried out on upper computer.

关 键 词：柔性电子 接近传感器 叉指电极 蛇形结构 位置检测系统 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]