摘 要

微电子技术大规模甚至超大规模集成电路技术的发展日新月异，使得计算机芯片技术获得了高速的发展。dsPIC数字信号处理器是一款结合了16位单片机的控制特点和数字信号处理器(DSP)高速运算优点的新型芯片，顺应了不断更新换代，并高速化、通用化、专用化和提高性价比以及模数混合集成等发展方向。

基于单片机的温度控制系统是通过控制单片机中的应用温度程序系统来控制单片机相关参数的方法。通过对不同的环境和场所进行有效的温度控制,保证单片机在相对温度范围内的精度,对于不同的温度其精度范围不同,在一些温度较为敏感的社会公共场合内,温度的要求控制往往是建立在一定的基础稳定之上进行合理范围的温度控制浮动,从而改变单片机温度的有效控制,保证系统温度的合理变化。本文将针对单片机温度的相对变化进行有效的控制,从而提高系统设计的合理性,完成单片机温度控制技术下的系统变化。针对不同的活动场合、不同的温度状况对单片机进行有效的精准控制。保证合理有效环境下完成工程产业的发展。

激光切割与其他切割方法相比，具有割缝细、热影响区小、切割面质量好、切割时无噪声、切割过程容易实现自动化控制等优点。激光真正广泛的应用在加工领域是在80年代快速横流和轴流CO2激光器出现后，并且在近十年得到了飞速发展。CO2激光器效率高、光束质量好、功率范围大，即能连续又能脉冲输出，且运行费用低，这使得其在材料加工领域具有广泛的应用。 激光器放电气体的温度稳定性对激光器的功率对光束质量有很大的影响，所以必须控制好激光器内部问的稳定。采用DSPIC芯片及其外围电路，控制16路测温电路，采用闭环控制的方式，使其温度保持在40℃左右。

关键词：DSPIC芯片；激光器切割；温度控制；

Laser Multi-channel Temperature Control System Design

Abstract

With the large-scale development of microelectronics technology and even VLSI technology, the computer chip technology gained rapid development. DsPIC digital signal processor is a new chip that combine the control features of a 16-bit microcontroller and high-speed operation of a digital signal processor (DSP). This chip conforms to the development of constant upgrading, high-speed, general-purpose, specialization, improving the cost and mixed analog-digital integration.

Based on single chip microcomputer temperature control system is through the application of the control of single chip microcomputer temperature method of related parameters to control the MCU application system. By different environments and places for effective temperature control, ensure the accuracy of single-chip microcomputer in the relative temperature range, the accuracy for different temperature range is different, in some temperature sensitive social public, the requirements of the temperature control is often based on the basis of stability for reasonable floating range of temperature control, so as to change the single chip microcomputer temperature control, ensure reasonable change of temperature of the system. This paper will on the relative changes of the single chip microcomputer temperature control, thus improve the rationality of the design of the system, under the single chip microcomputer temperature control technology of system changes

Laser cutting compared with other cutting methods, with a slotted thin, small heat affected zone, the cutting surface quality is good, no noise, cutting the cutting process is easy to realize automatic control, etc. Laser widespread application in the field of machining is real quick cross flow and axial flow CO2 laser in the 80 s, and got rapid development in recent 10 years. CO2 laser with high efficiency, good beam quality, large power range, namely to continuous and pulse output, and low operating cost, which makes it has extensive application in the field of material processing. Laser discharge gas temperature stability of laser power on the beam quality has a great influence, so you have to control the laser asked internal stability. Using DSPIC chip and its peripheral circuit, temperature measurement circuit control 16 road, with the method of closed loop control, to keep the temperature around 40 ℃.

Key words: DSPIC chip; Laser cutting; The temperature control

目 录

1 绪论 ……………………………………………………………………………………………1

1.1课题研究的背景及意义……………………………………………………………………1

1.2国内外现况及趋势........................................................1

2激光器温度控制系统的方案设计................................................3

2.1激光器温度控制系统的流程................................................3

2.1.1DSPIC33EP256MU806芯片介绍..........................................3

2.1.2RS232接口的介绍....................................................4

2.1.3PC机...............................................................5

2.2电磁阀的介绍............................................................5

2.2.1电磁阀的功能.......................................................5

3温度控制....................................................................7

3.1测温部分................................................................7

3.2电源部分.............................................................9

3.2.1测温部分电源....................................................9

3.2.2温度控制部分电源...............................................11

4激光器温度控制系统的软件设计...............................................12

4.1多路温度控制系统的软件总体设计.........................................12

4.2总体设计的流程图.......................................................12