Design And Implement The Hardware Of Circuit Control System Of Air-purifier Based On AVR Microcontroller

Indoor air particles, bacteria, viruses and other harmful substances have damaged to people's health,especially for those people in the indoor environment in a long time. With the improvement of living standards,people's air environmental quality require-ments and expectations of their daily lives and work own indoor have also increased misconduct.Indoor air purification technology has become a new field of environ-mental protection issues.Especially after the birth of indoor air,so many different types of air purifiers have sprung up into the market.In this paper,a new circuit system of air purifier with ultraviolet disinfection has been developed in this context.In this paper,the control system of ultraviolet air-purifier has been designed and developed based on AVR microcontroller.Firstly,the requirements analysis of system functional has been completed.ATmega128 microcontroller has been choosed to design the air purifier control system structure and working principle of the overall framework of this research project.Secondly,TGS 800 gas sensor And LHi878 pyroelectric infrared sensor have been used to detect indoor air quality and mobility of human IR signal.And then the signal will be transmitted to the microcontroller ports,the microcontroller will adjust and control the working status of air purifier automatically based on the signal.Hardware circuit design of each module of this circuit control system has been discribed priority in this paper.The overall structure of the hardware modules has been designed firstly,and then the circuit theory and implementation of the modules of power supply control, motor control, UV lamp control, LCD display control,infrared remote control and function keys control have been designed.On this basis, the main function of microcomputer control system programming has been discribed,and the trial operation control system and debugging has been completed.This type air purifier which has been researched in this paper,is a typical indoor air-purifier for the use of ultraviolet sterilization and disinfection product.Two sensor data acquisition modules integration are an important and innovative project design of this paper.Their integration makes this air purifier with conditions of automatic acquisition and automatic adjustment function of working,which has achieved product features of intelligent, energy saving and environmental protection.The successful development of this air-purifier's circuit control system, will make a significant contribution for indoor air pollution control and air purification technology inevitably.