文档介绍：毕业设计(论文)
斜刃焊接式厚冰雪碾压滚机构设计
Beveled-edge design welded thick snow rolling greens
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摘要
本课题是针对北京春辉新吉造纸机械厂热处理炉控温精度不高、热处理炉之间分布较散、产品技术参数保密性不高、工人劳动强度大等问题而提出的。主要研究了国内外热处理设备的控制现状、热电偶的工作原理、A/D转换器的工作原理、单片机的参数及性能,多路模拟开关的使用方法及PID控制算法,并简要介绍了单片机软件开发工具软件(WAVE)和电路设计软件(Protel DXP)。上位机采用Delphi 语言进行界面编程,编程直观快捷,界面简洁美观。在界面中实现了对热处理温度的监督控制,实现了对阶梯温度的设定,实现了数据的记录和查询及系统安全等功能,使控制快捷方便,提高了操作的准确性和工作效率。本设计产品通过热处理炉上现场调试结果表明:本系统能够使温度测量精度的绝对误差≤1℃(温度测量范围0~1200℃);控制精度:超调量≤2℃;稳态误差≤±1℃;上位机集中管理,解决了热处理炉分散不易管理、产品技术参数保密性不高、工人劳动强度大等问题。
关键词:
热电偶、单片机、A/D转换器、PID控制算法、控温精度
Abstract
This question for discussion is brought forward for aiming at such problems as a low accuracy of controlling temperature in heat treating furnace and parative dispersive distribution, a relatively low secrecy quality of the parameter of production’s technology and high labour intension in the factory and so on.
It mainly studys the current controlling condition of heat treating devices at home overseas, the work theory of thermalcouple and A/D switch, the parameter and performance of SCM, the usage of analog multiplexer and the controlling calculation method of PID. It also briefly introduces a software developing tool of SCM software (WAVE) and the designing software of circuit (Protel DXP).
The superior machine is programmed in the interface in Delphi. This programme is direct and swift and the interface is inct and appropriate. In this interface, It realize the supervise and control to the themperature of heat treating in the interface, carry out the designing of ladder temperatures, achieve the record and inquirement of data and keep the system safe and so on. So that these functions could help an operator control the machine swiftly and expiediently and advance the veracity of operation and the effect of work.
After the debugging of the design in the heat treating furnace on the spot, its result shows that the system can make the absolute error of the accuracy of temperature measuring