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Software Design of Transient Recording Analyzer Based on Ethernet

Author: WangChao
Tutor: HuBing
School: West China University
Course: Power Electronics and Power Drives
Keywords: Embedded System Virtual Instruments Data Acquisition Network SPC
CLC: TP216.3
Type: Master's thesis
Year: 2009
Downloads: 89
Quote: 1
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Abstract


Technology of transient data recording analysis has been more and more applied to the feild of power electronics, and has been achieved some functions of transient data such as collection, recording and analysis. For example: capture pulse edge rise time when the switching power supply starts; capture the peak value of pulse voltage, width of pulse voltage , pulse edge rise time, pulse voltage at the phase range of supply voltage voltage range as fluorescent lamp starter runs; Along with the development of embedded application domain, in certain data acquisition scene as a result of the environment or the distance limit, the data gathering needs the staffs remote control, from this, the high performance, the low power loss, the network embedded transient recording analyzer has obtained the widespread value and application.This paper uses a combination of graphical programming software LabVIEW and text of programming languages, prepare man-machine interface in the embedded platform and PC platform, thus takes a transient recording analyzer as server-side, and PC machine as a client, then the server will not only work alone, it can also use PC client machines to control embedded server-side program through Ethernet. The combination of the two programming languages, does not only play advantages of programming language in the preparation of device drivers, library functions, such as the underlying dynamic process, but also shows some features of LabVIEW software interface such as simple and intuitive, graphical programming, signal analysis function modular characteristics, so that the two languages can make up for their shortcomings to realize the operation of the underlying hardware, also prepare a friendly man-machine interface conveniently and quickly.The main work of this paper includes the following aspects:(1) To have a overall framework for system design, aimed at current several mainstream data collection system, at the basis of theory and practical need to have a analysis and research , take the British record company’s EM9000 Embedded Module as the platform, through the data adapter plate, to make data acquisition cards, Ethernet interface and power management module access to the embedded module, to constitute a transient recorders based on the Ethernet Analyzer server-side.(2) Under conditions of limited hardware resources in the embedded platform, to use LabVIEW software to program, to achieve the connection between software and hardware by calling up external interface provided by LabVIEW software, and to use the LabVIEW built-in signal analysis function, file operations and network communication for data analysis, storage and transmission and so on. Program structure uses the style of combination of Moore state machine structure and CASE structure, it can not only achieve a jump of the main interface with the various sub-interface, but aslo solve the problem of refreshing a screen, overcoming the drawbacks of limited hardware resources.(3) To prepare interactive client interface on the PC machine, and using case structure, principal and subordinate structure and state machine structure to achieve the design of other functions of a multi-waveform display, a main vice window display, eigenvalue analysis, the drop-down menu, so as to make the program be multi-threaded high-speed operation, and then to improve the efficiency of the CPU.(4) To use TCP / IP communication module function of LabVIEW software, according to Network Transfer Protocol, with less code, simple program structure to solve the control and data transmission which the PC-client effects on the embedded server-side, to get the realization of remote control collection based on the Ethernet.(5) To develop a test program in accordance with the design requirements, for the problems appeared in the process of debugging and testing , put forward some practical solutions. Finally, the test results meet the design requirements and gives the main results.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Automatic testing equipment,instruments > Automatic analyzer
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