The Design And Implementation Of Industrial Configuration HMI System Based On Linux

In industrial production,DCS has been widely used in every field since the need of the decentralized control of the devices and the centralized management of operators.DCS use the design thought of hierachy and modulization,and it reduce the workload in development.As it is at the top of the pyramid of the DCS,human-machine interaction system provides the interface for devices and operators,and undertakes many important tasks such as information display,communication,coordinate between modules and so on,the configuration method for develop HMI system has been more and more important in the industrial since its modulization,intelligentialize and expansibility.After analyze the merits and demerit of common configuration software at home and abroad,this paper improve the intrinsic method for development of the HMI system,and put forward a kind of design scheme of HMI system based on Linux from hardware to software.This paper first realizes the the design of hardware,which is an embedded system architecture based on ARM Cortex-A8 processor AM3352,including the core circuit,interface display,man-machine operation,equipment communication,data storage and transmission function module design.Then,according to the characteristics of the processor and the peripheral chips,transplants and optimizes the bootloader,operating system and file system.To make the optimized software operating environment,it transplants the Qte as the support for graphic in the embedded device.Finally,the Qt Creator is used to design the configuration software thinking of its powerful features as the graphical view framework of Qt,the good operation support of the database,the analytic function of the script and the serial port code of the third party,in which realizes the basic graphical interface and animation configuration,the data definition,storage,inquiry and revision,the establishment of the communication system,as well as the script function of edit,analysis and execution.The configuration HMI system has the advantages of low cost,simple operation,good real-time and safe data storage.The configuration software provides a simple development environment for enterprise employees.After rapid secondary development,the products can be put into production,avoiding much work from low level.After the laboratory and on-site debugging,the system can realize the basic configuration development,equipment communication,data storage to meet the initial requirements of the project.