多孔状复合介质层电容式柔性触觉传感器研究  

Research on Capacitive Flexible Tactile Sensor Based on Porous Composite Dielectric Layer

作　　者：刘彩霞[1] 朱文瑾 王志强 郭小辉[1] 刘平[1] 黄英[1,2] LIU Caixia;ZHU Wenjin;WANG Zhiqiang;GUO Xiaohui;LIU Ping;HUANG Ying(School of Electronic Science&Applied Physics,Hefei University of Technology,Hefei 230009,China;The State Key Laboratory of Bioelectronics,Southeast University,Nanjing 210096,China)

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230009 [2]东南大学生物电子学国家重点实验室,江苏南京210096

出　　处：《郑州大学学报（工学版）》2019年第6期16-22,共7页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(61673369)

摘　　要：为提升触觉传感器灵敏度和动态响应特性,基于发泡工艺制备具有良好电学特性和柔性的多孔状石墨烯/炭黑/硅橡胶导电复合材料;将其用作复合介质层以设计高性能柔性电容式触觉传感器,研究发泡剂含量对多孔状复合介质层电学特性的影响,并对多孔状复合介质层进行微观形貌表征;分析多孔状复合介质层电容式触觉传感单元结构、工作机理及其性能优化方法,对电容式触觉敏感单元进行性能测试,并设计可拼接式触觉传感阵列;构建基于STM32F103VET6和AD7147-1的电容式触觉传感阵列信息提取系统,实现压力实时分布感知.实验结果表明,提出的多孔状复合介质层电容式触觉传感器具有良好的检测灵敏度和动态响应特性,可用作机器人电子皮肤以实现高性能触觉感知.In order to improve the sensitivity and dynamic response characteristics of the tactile sensor,conductive microcellular foams of GNPs/CB/SR nanocomposites were prepared with favorable electrical properties and flexibility based on foaming technology,and it was used as composite dielectric layer to design high-performance capacitive flexible tactile sensor. The foaming agent concentration was analyzed to investigate the influence on the electrical properties of porous structure composite dielectric layer. And the microstructure and morphology of porous structure composite dielectric layer were characterized. The capacitive tactile sensing unit structure of porous structure composite dielectric layer,working mechanism and corresponding performance optimization methods were systematically analyzed. Meanwhile,performance testing for the capacitive tactile sensing unit was conducted,and expandable tactile sensing array was designed. And the capacitive tactile sensing array information extraction system based on high-performance microprocessor STM32 F103 VET6 and capacitive digital converter AD7147-1 was designed to achieve real-time pressure distribution perception. The experimental results indicated that the proposed capacitive tactile sensor with porous structure composite dielectric layer possessed good detection sensitivity and dynamic response characteristics,and could be used as robotic electronic skin to achieve high-performance tactile perception.

关 键 词：电容式触觉传感器 复合介质层 柔性 多孔状 电子皮肤 

分 类 号：TP242.6[自动化与计算机技术—检测技术与自动化装置]