高灵敏度离子皮肤手指关节角度传感器的设计

倪娜 1; 薛晓敏 2; 张陵 3; 王垠 4

doi:10.7652/xjtuxb202103019

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高灵敏度离子皮肤手指关节角度传感器的设计

更新时间：2025-07-09

- 高灵敏度离子皮肤手指关节角度传感器的设计
- Highly Sensitive Ionic Skin for Measuring Finger Joint Angles
- 西安交通大学学报 2021年55卷第3期页码：164-174
- 作者机构：
  
  西安建筑科技大学理学院,西安,710055
- 作者简介：
- 基金信息：
  
  : 2020-09-15。作者简介: 倪娜(1987—),女,讲师;薛晓敏(通信作者),女,副教授。基金项目: 国家自然科学基金资助项目(11702215);陕西省自然科学基金资助项目(2019JQ-766);陕西省教育厅专项科研基金资助项目(19JK0460)
- DOI：10.7652/xjtuxb202103019
  中图分类号： O39;TP212.9
- 网络首发：2021-03-10，
  
  纸质出版：2021
- 稿件说明：
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倪娜 1, 薛晓敏 2, 张陵 3, 等. 高灵敏度离子皮肤手指关节角度传感器的设计[J]. 西安交通大学学报, 2021,55(3):164-174.

Highly Sensitive Ionic Skin for Measuring Finger Joint Angles[J]. 2021, 55(3): 164-174.
倪娜 1, 薛晓敏 2, 张陵 3, 等. 高灵敏度离子皮肤手指关节角度传感器的设计[J]. 西安交通大学学报, 2021,55(3):164-174. DOI： 10.7652/xjtuxb202103019.

Highly Sensitive Ionic Skin for Measuring Finger Joint Angles[J]. 2021, 55(3): 164-174. DOI： 10.7652/xjtuxb202103019.

摘要

为解决柔性传感器监测手指关节运动时灵敏度、测量范围及阈值有限的问题

设计并制备了一种多介电层(3层)结构形式的离子皮肤手指关节角度传感器。该传感器由多个硅橡胶薄膜和高保水性的离子凝胶电极构成

当穿戴传感器的手指关节弯曲时

根据应变引起其电容信号的变化

可测得手指关节弯曲角度。构建多介电层结构形式的离子皮肤应变传感理论模型; 推导多介电层离子皮肤手指关节角度传感器的角度传感理论模型; 测试传感器输出与手指关节角度关系。实验结果表明

传感器角度传感理论模型与测试结果吻合较好; 传感器灵敏度为单介电层离子皮肤手指关节角度传感器的3.5倍

测量范围囊括手指关节从展平到完全弯曲状态角度

阈值小于1°

具有灵敏度高、测量范围广和阈值低的特性。离子皮肤多介电层的结构形式及理论模型对康复训练患者及微操纵机械手的精准测量具有较好应用前景。

Abstract

A flexible capacitive sensor based on multi-layer(three-layer)dielectrics is proposed to measure finger joint angle with wide range and low threshold. The sensor consists of silicon rubber films and ionic conductors with excellent water retention. When a finger adherent the sensor is bent

the finger joint angle can be obtained from the change in capacitance induced by the strain. The strain sensing principle of the sensor is investigated with experiments and theory. The theoretical model to describe the relationship between input(finger joint angle)and output(change in capacitance)is proposed on the basis of the strain sensing principle. Then the quantitative relationship is verified by experiments

and the results are in a good agreement with the theoretical model. The results show that the sensitivity of the multi-layer sensor is 3.5 times higher than that of the single-layer sensor composed of a dielectric and two ionic conductors

and that this multi-layer sensor has the ability to measure the angles of the finger joint from straight to fully bended state with a resolution less than 1°. Therefore

this multi-layer sensor has the advantages of high sensitivity

wide measurement range and low threshold. It is beneficial to precise measurement of finger joint angles for the rehabilitation training patients and manipulator.

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Keywords

references

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