一种快速响应的超灵敏仿生压力电子皮肤

An ultrasensitive bionic pressure electronic skin with fast response

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(1914.701)、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。

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(1914.701),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.