Research And Development Of Multi-environment Parameter On-line Monitoring System Based On FPGA

In recent years,industrialization of our country has developed rapidly,but there are many problems accompanying the process of the industrialized production,one of them is environmental pollution.Therefore,it is crucial to develop an intelligent and efficient online atmospheric monitoring equipment.In order to meet the current needs of multi-parameter monitoring,convenient information sharing and high data accuracy,based on the parallel data processing capability of FPGA and the wide application of cloud platform,this paper designs a system for multi-environment parameter detection,and then realizes real-time monitoring of multiple environmental parameters.The main research contents of this paper include the following points:(1)Researching on environmental online monitoring technology:Analyzing the current methods of environmental monitoring,combining with the concentration of NO2 monitoring project at the boundary of the Weinan Chemical Plant,a monitoring program with multiple monitoring parameters and multiple distributed nodes is designed.The system can remotely monitor the temperature and humidity,NO2,particulate matter and other concentration information of the environment in real time.And the applicability,real-time and scalability of this program are discussed.(2)Building a software and hardware platform with FPGA as the core:First,the monitoring node circuit is designed,and which is used as the master control based on the parallel data processing capability of FPGA,other hardware modules include power supply unit,sensor array,wireless communication module and motor drive circuit,etc..Then,the FPGA software logic design is completed based on the hardware design,including the development of modules for system synchronization clock,instruction analysis,sensor control,signal channel switching,data buffer processing and data upload.Finally,the driver development of the various functional modules of the acquisition part is realized,so as to realize the collection of multi-channel data information.(3)Forwarding the data collected by the monitoring terminal:Studying the networking communication principle of the ESP8266 wireless communication module and its data forwarding function,the terminal collection equipment is combined with the wireless communication module,so as to achieve real-time forwarding of environmental data.After studying TCP,EDP and other communication protocols,and based on the TCP protocol,complete the development of the OneNET cloud platform data analysis Lua script,the Lua script converts the data uploaded by the sensor terminal into JSON format and stores it on the OneNET cloud platform.(4)Realizing the visualization of terminal data flow:After the analysis the access method of OneNET cloud platform products and equipment,the platform’s functions of equipment management,historical data query,trigger threshold alarm and API development and so on,which were deeply studied.The creation of cloud platform of the virtual products and devices,which binds them to the data stream of the terminal device,realizes the communication between the terminal device and the cloud platform.Finally,the data stream UI display interface is designed to realize the reasonable and intuitive display of the data.The joint debugging of the system monitoring terminal and the cloud can show that the system is operating normally and can realize online monitoring of the data of the monitoring node.The results show that the system has the characteristics of high utilization,miniaturization,internet of things and so on,and the system can be widely used in the field of environmental monitoring.