An ultrasensitive bionic pressure electronic skin with fast response
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 cir-cuit 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 char-acteristics 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 percep-tion.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.
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