材料科学
可穿戴计算机
水下
无线
声学
无线传感器网络
水声通信
电子工程
计算机科学
工程类
电信
嵌入式系统
计算机网络
海洋学
物理
地质学
作者
Qian Zhang,Yong Wang,Dongsheng Li,Jin Xie,Kai Tao,PingAn Hu,Jian Zhou,Honglong Chang,Yongqing Fu
标识
DOI:10.1002/adfm.202209667
摘要
Abstract Flexible and wearable sensors are highly desired for health monitoring, agriculture, sport, and indoor positioning systems applications. However, the currently developed wireless wearable sensors, which are communicated through radio signals, can only provide limited positioning accuracy and are often ineffective in underwater conditions. In this paper, a wireless platform based on flexible piezoelectric acoustics is developed with multiple functions of sensing, communication, and positioning. Under a high frequency (≈13 MHz) stimulation, Lamb waves are generated for respiratory monitoring. Whereas under low‐frequency stimulation (≈20 kHz), this device is agitated as a vibrating membrane, which can be implemented for communication and positioning applications. Indoor communication is demonstrated within 2.8 m at 200 bps or 4.2 m at 25 bps. In combination with the sensing function, real‐time respiratory monitoring and wireless communication are achieved simultaneously. The distance measurement is achieved based on the phase differences of transmitted and received acoustic signals within a range of 100 cm, with a maximum error of 3 cm. This study offers new insights into the communication and positioning applications using flexible acoustic wave devices, which are promising for wireless and wearable sensor networks.
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