Research Of Particle Concentration Acquisition And Transmission System Based On ARM

Nowadays,environmental problems have been increasingly affecting people's lives and the development of the national economy,especially PM2.5 and PM10 in the atmosphere.Medical research shows that the body's physiological structure of the PM2.5 does not have any filtering and blocking effect,mainly on the respiratory and cardiovascular system damage.At present,there is an urgent need for an environment monitoring system that can collect and transmit PM2.5 and PM10 concentrations in real time and realize real-time monitoring.This paper proposes a kind of particle concentration and transmission system based on ARM acquisition,comparing with the products on the market,the sysytem's master chip using Samsung's S3C2440 A microcontroller to replace the microcontroller,the sensor using Dust Sensor gray layer sensor,and new adding the fourth-generation mobile network technology instead of GPRS mobile network to improve the transmission rate and adaptive algorithm RLS to improve the collection precision,achieving the real-time collection and transmission of respirable particulate matter.The main contents of this paper are as follows:First,Research on particle concentration collection based on ARM and wireless communication technology and adaptive algorithm of remote transmission system.The system adopts 4G wireless communication technology,the network architecture and network protocol stack architecture of LET are studied,which mainly includes user plane and control plane protocol stack.Three adaptive filtering algorithms,LMS,NLMS and RLS are studied deeply and three kinds of adaptive filtering algorithms are simulated and compared by MATLAB,the results show that the RLS algorithm has the best effect on denoising.Second,the whole system design and the hardware design of the particle concentration acquisition instrument remote transmission system based on ARM.According to the design requirement of the particle concentration and the remote acquisition system,this paper put forward the overall structure of a particle concentration acquisition and transmission system.And according to the overall structure of the proposed system,the hardware structure of S3C2440 A microprocessor is built,which mainly includes S3C2440 A its peripheral circuit,interface circuit,power supply module,acquisition module,4G wireless communication module and A/D module.According to the principle of PCB plate,complete particle concentration acquisition and transmission system control circuit PCB.Third,Software design for the particle collection and remote transmission system.Based on the hardware analysis and design of PM collection and remote transmission system,and in Keil Vision5 development environment,we use the C language programming,to complete the concentration of particulate matter collection and remote software system design,mainly including: the construction of embedded Linux system,application and driver design,and in the soft ware to collect the concentration of particles and remote transmission system for modular debugging.At the same time,the C/S architecture is used to design the host computer.Fourth,the particle collection and remote transmission system test and analysis.When completed the design of hardware and software of particle collection and remote transmission system,test system.Test items mainly include communication function test ?data acquisition test and the system overall test.Test results show that,this system 4G wireless network communication quality is strong,downloading speed is quick,the gathering module gathers the data accurate and so on,in addition,the whole system is small and lightweight,low power consumption,easy to install and the like.