聚二甲基硅氧烷
材料科学
压力传感器
卷积神经网络
聚吡咯
可穿戴计算机
压阻效应
深度学习
纳米技术
计算机科学
人工智能
生物医学工程
光电子学
聚合
嵌入式系统
聚合物
机械工程
工程类
复合材料
作者
Hui Xia,Wei Lin,Hao Zhang,Zihu Wang,Lizhong Zhu,Haolin Cai,Yanhua Ma,Zhe Yang,Dongzhi Zhang
标识
DOI:10.1038/s41378-023-00605-0
摘要
Abstract The combination of flexible sensors and deep learning has attracted much attention as an efficient method for the recognition of human postures. In this paper, an in situ polymerized MXene/polypyrrole (PPy) composite is dip-coated on a polydimethylsiloxane (PDMS) sponge to fabricate an MXene/PPy@PDMS (MPP) piezoresistive sensor. The sponge sensor achieves ultrahigh sensitivity (6.8925 kPa −1 ) at 0–15 kPa, a short response/recovery time (100/110 ms), excellent stability (5000 cycles) and wash resistance. The synergistic effect of PPy and MXene improves the performance of the composite materials and facilitates the transfer of electrons, making the MPP sponge at least five times more sensitive than sponges based on each of the individual single materials. The large-area conductive network allows the MPP sensor to maintain excellent electrical performance over a large-scale pressure range. The MPP sensor can detect a variety of human body activity signals, such as radial artery pulse and different joint movements. The detection and analysis of human motion data, which is assisted by convolutional neural network (CNN) deep learning algorithms, enable the recognition and judgment of 16 types of human postures. The MXene/PPy flexible pressure sensor based on a PDMS sponge has broad application prospects in human motion detection, intelligent sensing and wearable devices.
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