Development Of Flexible Wearable Sensor For Human Motion Detection And Construction Of Intelligent Detection System

With the development of the Internet of Things technology and fifth generation technology,as well as the growing demand for smart wearable devices,electronic skins have received widespread attention as an important tool for connecting the real world and virtual networks.As a member of the electronic skin system,the flexible wearable sensor has a series of advantages such as small size,high sensitivity,comfortable wearing,and perfect fit with the skin.It is of great significance to the monitoring of human life activity signals and the realization of human-computer interaction systems.Although traditional silicon-based metal sensors have excellent performance,their inherent rigidity is difficult to meet the requirements of wearable,so people urgently need small and flexible wearable products.This dissertation is dedicated to researching PDMS-based flexible wearable sensors,cooperating with STM32 single-chip microcomputer,mobile phone display platform and Labview interface to construct a portable intelligent detection system to realize online accurate monitoring of human motion signals and human-computer interaction functions.Developed Mo Se₂/MWNTs flexible pressure sensor based on puncture microstructure and Ag NFs/WMNTs flexible strain sensor based on sandwich structure,and conducted mechanical performance testing and analysis from the aspects of sensitivity,response/recovery characteristics,repeatability,stability,etc.Research on the potential application prospects of flexible pressure sensors and strain sensors in human physiological signal monitoring,motion signal detection,and human-computer interaction.Through XRD,SEM,TEM,XPS and other characterization techniques to observe the microstructure and morphology of the sensing material,reveal the potential mechanism of the flexible sensor from multiple angles.Based on the STM32microprocessor and the developed flexible sensor,a data acquisition system composed of sensor signal processing module,power supply module and signal communication module was designed,which can realize sensor data acquisition and processing,wireless transmission and sending functions.Developed mobile phone APP and Labview interface to realize online visual monitoring of human motion signals.At the same time,a set of smart gloves based on flexible strain sensors was designed to realize human-computer interaction with the three-dimensional model of the manipulator on the Labview interface.This paper takes"new materials-new devices-new applications"as the main research route to explore new and high-performance conductive materials for the sensing layer,and develop flexible wearable sensors in conjunction with flexible substrates.Combine the developed wearable flexible sensor with a mobile terminal and Labview host computer to realize portable detection of human motion signals,and provide new applications for our flexible pressure sensors and strain sensors in health care,human-computer interaction,virtual electronics,etc.