Research On Key Technologies Of Human-machine Perception And Sensing Interaction For Internet Of Things

At present,with the rapid development of Internet technology and the introduction of Industry 4.0,social life in the future will undergo tremendous changes.At present,the development of 5G technology and the proposal of 6G technology make the Internet of Everything not only our expectation but also hopeful to become a reality.To realize the Internet of Everything,one of the key technological breakthroughs lies in the development of new human-machine interaction sensors.For example,how does the smart home system perceive the temperature and position of the human body to realize the automatic regulation of the home system,how the unattended elderly can perceive and judge their own physical condition indicators and upload them to the monitoring system,and how the bionic robot has similar ability of human skin to perceive external information and so on.For this reason,various types of electronic skin devices have been reported and there have been more gratifying research results.It has been reported that various types of electronic skins can be realized,including pressure sensing,temperature sensing,location sensing and self-repair.However,in fact,most of the proposed electronic skins usually have a single detection function,and it is still very difficult to detect two or more kinds of information at the same time.To this end,this paper prepares a temperature and pressure sensing sensor of human-machine interaction and realizes the function of simultaneously measuring pressure signal and temperature signal through the superposition design of different functional layers on the structure.The temperature sensing part is prepared by mixing pectin powder and xanthan gum powder.The prepared pectin-xanthan gum blend film has a sensitivity of 2.563 %/? in the range of 30 ?-51 ?,while at 51 ? the sensitivity reaches 0.992 %/? in the range of 70 ?.For pressure sensors,PDMS(polydimethylsiloxane),CNT(carbon nanotubes)and soft sugar are used to make PDMS-CNT(polydimethylsiloxane-carbon nanotube)conductors with a porous structure.And it has a fast response time of 0.5 s.In addition,this article not only prepares a sensor device that can measure pressure signals and temperature signals at the same time but also makes this sensor device become an electronic skin system through a circuit with a voltage divider function,the sampling function of the STM32single-chip microcomputer and the VC computer client interface display.This electronic skin system can sample and analyze the voltage value through STM32 when the sensor device detects temperature and pressure signals and determine whether it exceeds the set threshold to determine whether to send a valid signal to the computer client through serial communication to respond to the alarm display,so as to realize the alarm function of over-voltage and over-temperature.In this paper,the research on the key technologies of human-machine interaction sensing and sensing for the Internet of Things has the advantage of being able to detect two sensing signals at the same time,and the sensing device is made into an electronic skin system with over-voltage and over-temperature alarm functions.And it can provide an effective solution for the future joint development of electronic skin and Internet of Things technology.