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A Study of the Hold Control Panel for Fast Axial Flow CO2 Laser

Author: ZhangDeLing
Tutor: HanZuoSheng；WangYouQing
School: Huazhong University of Science and Technology
Course: Physical Electronics
Keywords: Fast axial flow CO2 laser AT89C52 microcontroller Liquid crystal display (LCD) A / D converter Serial Communications
CLC: TN248
Type: Master's thesis
Year: 2005
Downloads: 271
Quote: 0
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Abstract


High power fast axial flow CO2 laser increasingly widely used in industrial processes, the control system miniaturization, intelligence more and more users. In this paper, ATMEL Corporation AT89C52 microcontroller as the core, developed out of a high power fast axial flow CO2 laser front control panel. Articles in the content is divided into SCM keyboard and a liquid crystal display unit, A / D conversion unit and a communication interface unit of three parts. The article first introduces the fast axial flow CO2 laser and its processing system status and development trend, which made the fast axial flow CO2 laser control system functions and requirements. A detailed analysis of fast axial flow CO2 laser control system works and processes, focusing on the pressure control system and the principle of power control system. In these analyzes and research, based on the design of a single-chip microcomputer AT89C52 as the core of fast axial flow CO2 lasers front control panel. SCM keyboard and LCD keyboard display unit mainly discusses the control of the working principle and design methods, including the keyboard, the work process and to deal with problems as well as liquid crystal display module selection and control of software operation. The article also focuses on the character and the character of the LCD display design, and operation control commands. Gives the keyboard and display circuit diagram. A / D conversion of the power unit is mainly to solve an input method, the analog signals into digital signals and processes are discussed principle. Analysis of the A / D conversion of the basic principle and conversion method, the design of the system proposed A / D conversion unit block diagram of the circuit, designed a MAX114 the A / D conversion chip single A / D conversion circuit unit. Communication interface unit mainly for AT89C52 microcontroller and the next crew of communication between the design, respectively, from the hardware and software design gives concrete implementation. Including studies RS485 master-slave principle and method of communication, the development of the communication protocol used by the system to complete the host computer (control panel) and slave (PLC) communication software design. The experiments on the designed control system has been verified, the experimental results show that the control panel, high reliability, easy operation, easy maintenance, user-friendly, with good flexibility and greater flexibility in the interface, the A / D conversion unit design has its own unique ideas. And low cost, has good practical value.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser
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