An ultrasensitive bionic pressure electronic skin with fast response

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2024, Vol.47 No.5: 649-654, 711

DOI: 10.3969/j.issn.1003-5060.2024.05.011

Authors

LI Yuwen $ ^{1} $, LIU Ping $ ^{1} $, HU Qiusheng $ ^{1} $, WU Shunge $ ^{1} $, LIU Caixia $ ^{2} $, HUANG Ying $ ^{1} $

(1. School of Microelectronics, Hefei University of Technology, Hefei 230601, China; 2. School of Physics, Hefei University of Technology, Hefei 230601, China)

Abstract and Keywords

Abstract: In this paper, a flexible pressure sensing unit with regular crack structure was fabricated firstly. The unit was inspired by human fingerprint ridge structure, based on modified multi-walled carbon nanotubes filled with UV-curable adhesive and fabricated by screen printing. Then, a bus circuit structure based on asynchronous coding was designed through the biological neuron information transmission mode. Finally, by combining the designed circuit system structure with the sensing unit, a fast response ultrasensitive bionic pressure electronic skin (e-skin) was obtained. The results show that by introducing the bionic skin structure, the designed flexible pressure sensing unit has the characteristics of high gauge factor (1 914.701), fast response time (52 ms) and high stability. The serial-parallel signal transmission mode based on asynchronous coding effectively improves the information transmission speed and significantly improves the real-time performance of e-skin information perception. In addition, the neuron-like signal transmission mode enables the e-skin to retain the complete sensing function as long as the information transmission channel is not damaged.

Keywords: electronic skin(e-skin); ultrasensitive; resistance type; asynchronous coding; scalable

作者信息

李育文 $ ^{1} $，刘平 $ ^{1} $，胡秋生 $ ^{1} $，吴顺哥 $ ^{1} $，刘彩霞 $ ^{2} $，黄英 $ ^{1} $

(1. 合肥工业大学微电子学院，安徽合肥 230601；2. 合肥工业大学物理学院，安徽合肥 230601)

摘要和关键词

摘要: 文章首先通过仿人体指纹脊状结构, 基于改性多壁碳纳米管填充紫外固化胶制备导电复合材料, 借助丝网印刷制作具有规则裂纹结构的柔性压力传感单元; 然后通过仿生物体的神经元信息传输方式, 设计基于异步编码的总线式电路结构; 最后通过将所设计的电路系统结构与传感单元相结合, 得到一种快速响应的超灵敏仿生压力电子皮肤。结果表明, 通过引入仿生表皮结构, 所设计的柔性压力传感单元具有高灵敏系数 (1 914.701)、快速响应 (52 ms) 和高稳定性的特点。基于异步编码设计的串行-并行信号传输模式可有效提升信息传输速度, 显著提升电子皮肤信息感知的实时性, 此外, 仿神经元信号传输模式使得电子皮肤只要信息传输通道不受到破坏, 仍能保留完整的传感功能。

关键词: 电子皮肤；超灵敏；电阻式；异步编码；可扩展

Funding

浙江省重点研发计划资助项目（2018C01041）；中央高校基本科研业务费专项资金资助项目（JZ2020HGTB0027）

合肥工业大学学报(自然科学版)

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