Highly sensitive and stretchable piezoelectric strain sensor enabled wearable devices for real-time monitoring of respiratory and heartbeat simultaneously

作     者：Zhenjie Ji Menglun Zhang Zhenjie Ji;Menglun Zhang

作者机构：State Key Laboratory of Precision Measuring Technology and InstrumentsTianjin UniversityTianjin 300072China 

出 版 物：《Nanotechnology and Precision Engineering》 (纳米技术与精密工程（英文）)

年 卷 期：2022年第5卷第1期

页      面：12-23页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 10[医学] 

基　　金：We are grateful for funding from the Natural Science Foundation of China(NSFC Grant No.62001322) the Tianjin Municipal Science and Technology Project(No.20JCQNJC011200) the National Key Research and Development Program(No.2020YFB2008801) the Nanchang Institute for Microtechnology of Tianjin University 

主　　题：Physiological signal Strain sensor High sensitivity Flexibility Early diagnosis COVID-19 

摘      要：The World Health Organization has declared COVID-19 a *** demand for devices or systems to diagnose and track COVID-19 infections noninvasively not only in hospitals but also in home settings has led to increased interest in consumer-grade wearables.A common symptom of COVID-19 is dyspnea,which may manifest as an increase in respiratory and heart *** this paper,a novel piezoelectric strain sensor is presented for real-time monitoring of respiratory and heartbeat signals.A highly sensitive and stretchable piezoelectric strain sensor is fabricated using a piezoelectric film with a serpentine *** thickness of the patterned PVDF flexible piezoelectric strain sensor is only 168μm,and the voltage sensitivity reaches 0.97 mV/με.The effective modulus is 13.5 MPa,which allows the device to fit to the skin and detect the small strain exhibited by the human *** vibrations are captured by the piezoelectric sensor,which produces an electrical output voltage signal conformally mapped with respiratory–cardiac *** separate heart activity and respiratory signals are extracted from the mixed respiratory–cardiac signal by an empirical mode decomposition data processing *** detecting vital signals such as respiratory and heart rates,the proposed device can aid early diagnosis and monitoring of respiratory diseases such as COVID-19.