微波真空干燥设备数字化控制系统设计.doc

微波真空干燥设备数字化控制系统设计 CHANGZHOU INSTITUTE OF TECHNOLOGY KC021-1 毕 业 设 计 说 明 书 题目： 二级学院（直属学部）： 延陵学院 专业：电气工程及其自动化 学生姓名： 韩琳 班级： 07电Y2 学号： 指导教师姓名： 职称： 评阅教师姓名： 职称： 2011 年 6 月 常州工学院毕业设计论文 摘 要 针对这些缺点，采用三菱的小型PLC对整个微波真空干燥设备运行系统进行控制，可实现较高的自动化程度，并完成智能控制、状态显示和故障报警等任务，同时还提供良好的人机界面与操作员进行交互，使得修改各种参数简单、易行，对于机械设备的运行能及时、快速、准确的反映。其控制系统结构清楚、线路简单、工作可靠、同时设置了手动和自动控制开关，使得系统维护更加方便，减轻了工人的劳动强度，提高了系统的稳定性和可靠性。 本控制系统具有物料循环、微波磁控管控制和辅助加热控制、真空控制、温度检测、真空度检测和故障检测的功能。控制系统采用红外测温等技术，并通过PLC编程，解决了在微波情况下温度和真空度的检测，同时使用变频器控制电机转速，以便于物料均匀加热。在触摸屏上可以显示温度、真空度、时间、电机转速等信息，也可以显示报警信息。 关键词： 微波；真空干燥；数字化；控制系统；可编程逻辑控制器 Abstract This article was introduced PLC in microwave vacuum drying equipment application. I 常州工学院毕业设计论文 Traditional microwave vacuum drying equipment controlled by relays, its contact is various, the trouble is frequent, maintain inconvenient, not only influence the normal work of the microwave vacuum drying equipment, but also have severe effect on the quality of the products . In response to these shortcomings, Small-scale PLC which adopt Mitsubishi runs the system to control to the whole microwave vacuum drying equipment , Can achieve a higher degree of automation, and complete the intelligent control, alarm and fault status display tasks， at the same time provide a good human-machine interface to interact with the operator, making the modification of various parameters is simple, easy, for the operation of machinery and equipment in time, quickly and accurately reflected. The control system structure clearly, the line is simple, reliable, and set the manual and automatic control switch， establishes to suffer to move at the same time/ automatic control switch, Makes system maintenance more convenient and reduce the labor intensity and improve the system stability and reliability. The control system has material recycling, Control of microwave magnetron and auxiliary heating control, vacuum control, temperature measurement,