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The second generation MOCVD method of control system

Author: HuangJunRong
Tutor: GuoRunQiu
School: Xi'an University of Electronic Science and Technology
Course: Control Theory and Control Engineering
Keywords: MOCVD WinCC Programmable control
CLC: TP273.5
Type: Master's thesis
Year: 2007
Downloads: 25
Quote: 0
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Abstract


In this paper, a second-generation MOCVD control system design and implementation. The project comes from the spectrum of military electronic components research projects (0405XE0004): wide bandgap semiconductor materials MOCVD growth technology and equipment development . The second generation MOCVD control system adopts Siemens PLC-300 system as the core controller , using the C language and VB to achieve a PC with WinCC HMI monitoring system, the use of serial technology enables IPC to connect with the system instrumentation communication . MOCVD system according to process requirements , the system uses an intuitive WinCC software design , image, easy-to- PC monitoring system for the first generation of the deficiencies and defects put forward a new design. Such as the addition of the analog and digital data stored in real time , temperature control , real-time data storage and curve simulation, smooth analog output processing , alarm processing and other functions, to solve the multi-variable transmission resulting from PLC memory consumption, communication speed is slow , the screen update delay phenomenon , to achieve a bulk modification and a log way to save data. The second generation MOCVD control system not only inherits the first generation MOCVD control system advantages, but also increases the control system to improve the function of the system's performance is more stable , improve, and more artificial intelligence . The system is now in full operation stage, and has also grown a three qualified high-quality GaN materials .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system > Computer control, computer control system
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