Research And Development Of Intelligent Measurement System Based On Embedded Ethernet Technology

The trends towards enterprise information program extends a requirement for the control system to the administration of network, digital and public. Control network has been developed from traditional DCS system to Fieldbus system,which brings a high-level technological revolution in automation. However, the advantage of fieldbus is confined by the appearance of a large variety of subsistent criterion, also influencing the spreading and development of technology. So, ethernet is selected as a resolution for this limitation, and is wildly employed in industrial management and control field due to its good publicity, high speed of communication, low cost and abundant hardware and software resource as well as a continuable ability of updating etc. All these advantages produce a direction regarding its implementation into the field equipment. Thus, ethernet will build up an open infrastructure and realize eamless integration betweenm management layer and field control layer.Intelligent measurement equipments are basic and key of control network. Application of high performance embedded technology to develop intelligent measurement equipment is one of the most important trends. Using intelligent measurement system based on embedded ethernet technology can realize high performance of data acquisition and monitoring. Also, supervisor from far away can supervise field equipments and obtain rich and intuitionistic data and by operating Web browser which is used generally.The thesis firstly introduces the research background, the research present situation and the research meaning of embedded ethernet technology. Then, author brings forward the overall design of the structure of industrial ethernet network, the general selection of hardware and softeware solution of embedded measurement equipment. After the system design finished, author detailedly illustrates how to implement the hardware and software of the embedded equipment.. Mechanism and design theory of each part is deeply analyzed. The realization of 32-bit embedd processor system, ethernet interface model, AD data acquisition model, uCLinux OS, driver under uCLinux, socket, HTTP protocol, embedded Web Server are given in detail. Finally, the new type of the intelligent measurement equipment developed is tested and the result shows that it is provided with the basic function of high speed data acquisition Web Server. The Result and the the intelligent measurement equipment developed of this thesis laid a solid base and provided a valued reference for application of high performance embedded system in industrial control field and popularization of industrial ethernet.