Multichannel Flexible Pulse Perception Array for Intelligent Disease Diagnosis System
Tiezhu Liu, Guangyang Gou, Fupeng Gao, Pan Yao, Haoyu Wu, Yusen Guo, Minghui Yin, Jie Yang, Tiancai Wen, Ming Zhao, Tong Li, Gang Chen, Jianhai Sun, Tianjun Ma, Jianqun Cheng, Zhi‐mei Qi, Jiamin Chen, Junbo Wang, Mengdi Han, Zhen Fang, Yangyang Gao, Chunxiu Liu, Ning Xue
Abstract
Pressure sensors with high sensitivity, a wide linear range, and a quick response time are critical for building an intelligent disease diagnosis system that directly detects and recognizes pulse signals for medical and health applications. However, conventional pressure sensors have limited sensitivity and nonideal response ranges. We proposed a multichannel flexible pulse perception array based on polyimide/multiwalled carbon nanotube–polydimethylsiloxane nanocomposite/polyimide (PI/MPN/PI) sandwich-structure pressure sensor that can be applied for remote disease diagnosis. Furthermore, we established a mechanical model at the molecular level and guided the preparation of MPN. At the structural level, we achieved high sensitivity (35.02 kPa –1 ) and a broad response range (0–18 kPa) based on a pyramid-like bilayer microstructure with different upper and lower surfaces. A 27-channel (3 × 9) high-density sensor array was integrated at the device level, which can extract the spatial and temporal distribution information on a pulse. Furthermore, two intelligent algorithms were developed for extracting six-dimensional pulse information and automatic pulse recognition (the recognition rate reaches 97.8%). The results indicate that intelligent disease diagnosis systems have great potential applications in wearable healthcare devices.