基于PLC和触摸屏的胶囊印字系统设计

目的研究胶囊印字机的自动控制系统及人机界面的印字方案,从而实现胶囊自动印字控制系统的设计,完成胶囊印字和检测的全自动工业过程。方法从胶囊印字这一工业过程控制对象出发,基于PLC和触摸屏技术,制定胶囊印字机胶囊印字控制系统的总体方案设计,对胶囊印字这一工业过程进行控制,并且计数显示结果。结果该控制系统简单易操作、可靠稳定性好,极大地提高了生产效率和产品合格率,通过测试最大生产效率可高达70 000粒/小时,合格率高达99.95%以上。结论设计出的胶囊印字系统可以实现胶囊上料、印字、废品检测和剔除、计数、出料的工业过程控制。经触摸屏操作可手动、自动控制工业过程,具有产量数、装箱数、合格数、废品数的计数限值设定和清零、报警等功能。

Design of Capsule Printing System Based on PLC and Touch Screen

The work aims to study the automatic control system of capsule printing machine and the printing scheme of human-machine interface (HMI), so as to achieve the design of capsule automatic printing control system and complete the automatic industrial process of capsule printing and detection. Starting with the industrial process control objects for the capsule printing, and based on PLC and touch screen technology, an overall scheme design of capsule printing control system for capsule printing machine was made to control the process of capsule printing industry and count the results. The control system was easy to operate with good reliability, which greatly improved the production efficiency and product percent of pass. Through test, the maximum production efficiency could reach 70 000 pcs/h and the percent of pass was over 99.95%. The capsule printing system designed can achieve control over the industrial process of capsule feeding, printing, waste detection and elimination, count and discharge. The industrial process can be manually and automatically controlled by operating the touch screen and the functions, such as setting, zero clearing and alarm of count limits of production number, packaging number, and the number of qualified products and rejects are provided.