Research On Key Technology Of Wearable Self-powered Infrared Sensing Microsystem

The advancement of science and technology has brought more and more benefits to people’s lives,making people progress from the agricultural age to the industrial age,the information age.On the basis of the increasingly rich material life,the advent of the information age and the popularization of the Internet,people’s spiritual life is also becoming increasingly rich.More and more technology products are beginning to focus on the balance between technology and humanities,especially the emergence of the Internet of Things,which has led to the rapid development of wearable electronic devices,such as Apple Watches,smart bracelets,which are used to monitor human movement and heart rate.While these wearable devices provide various functions,their battery life has become an important factor restricting their development.At present,these devices use traditional chemical batteries,But its degradability and biocompatibility are not good.So triboelectric nanogenerator(TENG)was proposed to convert mechanical energy from human exercise into electrical energy.However,in order to improve the output of the existing TENG devices,most of the materials used are hard materials,which are difficult to match with wearable devices and have low practicability.Based on the TENG mechanical energy collection technology,this paper studies the basic principles of TENG.By collecting two different energy sources,triboelectric and piezoelectric,a composite friction nanogenerator is realized.At the same time,the power management circuit and infrared sensor unit of the self-driving system Research in other aspects,the overall design and development of wearable self-driving infrared sensor micro-system.The main content of this paper includes:(1)For triboelectric and piezoelectric nanogenerators,the basic principles are deduced and analyzed,and the existing work at home and abroad is summarized.The materials for triboelectric and piezoelectric composite devices are selected and designed,and the selection is decided Silk protein and polyvinylidene fluoride are used as materials for triboelectric and piezoelectric composite devices.Secondly,this article compares the preparation methods of flexible devices.In order to realize the wearability and permeability of the devices,it is decided to introduce electrospinning technology to complete the preparation of the devices.(2)We analyze the electrospinning process.The results of the electrospinning of silk protein and polyvinylidene fluoride were compared,and the optimal spinning process parameters were selected based on the experimental data.The performance of the device in the contact separation mode was analyzed as well.The working state and the output performance of the device in other states are tested.(3)We select and design the power management circuit and infrared sensor circuit,integrate the circuit into a module,collect mechanical energy and convert it into electrical energy,and use the power management circuit to realize power supply to the low-power pyroelectric infrared sensor.This research work is based on two composite energy sources---triboelectricity and piezoelectricity,and realizes the use of wearable self-driving flexible composite energy devices to drive low-power pyroelectric infrared sensors.The research work in this paper mainly realizes the collection of triboelectric and piezoelectric conversion of mechanical energy into electric energy by using the electrospinning process to process silk protein and polyvinylidene fluoride.Also,it realizes the flexibility and permeability of the device and makes the wearable device realize self-supply energy.It provides a new method for the energy supply of wearable devices.