基于PLC和触摸屏自动售货机设计.docx

论文题目基于 PLC 和触摸屏自动售货机设计( 英文)The vending machine design based on PLC and touch screen 摘要自动售货机的样式有很多,大多数放在短时间人口流动又比较大的公共场所,比如学校、食堂、车站、医院等。在这些地方,它不仅吸引人眼球, 更是为人们提供了一种便捷的购物方式。这次设计的是一个出售饮料的自动售货机。有许多元件可以对自动售货机实现售货功能,需要一个合适的主控单元,这可以从价格、功能、可靠性等多方面考虑来做出选择。相对于别的元件, PLC 具有的优势明显,选择用它来实现控制。根据售货性质,设计售货机的结构,确定它可以实现的功能,是如何工作的,选择相应的硬件(电机、货币识别器等) 。然后对 I/O 进行分配,考虑编写程序需要的存储容量,确定 PLC 的型号,画出控制电路接线图。对所选型号的 PLC 进行进一步的了解并熟悉的相关指令功能, 弄懂自己要用的指令, 根据控制要求,在“ GX Developer ”中编写合理的程序。此次设计还涉及到触摸屏的运用,首先需要对触摸屏有一定的了解,明白它的工作原理,最后进行触摸屏仿真,做出相关触摸屏设计。关键词:自动售货机; PLC ;梯形图; 触摸屏 ABSTRACT A great variety of vending machine is mostly placed in the public area like schools 、 dining-hall and hospitals etc. In these places, the vending machine not only attracts people ’s attention ,but also brings people a new way to go shopping. It is designed for selling drinks . Though the function of the vending can be implemented by many controllers, we need to make a right choice. So we should take the price 、 functions 、 reliability and other aspects into consideration . PLC has great advantages, it is more suitable. So we can use it to control the vending machine. On the basis of its sales, the structure of the vending machine can be designed. And make sure that it can achieve the function. You should also know how it works and select suitable hardware(motor 、 currency, etc.). Then, we make a distribution between input and output and consider the needed storage capacity for writing the program. The type of PLC needs tobe determined. And draw the wiring diagram of the control circuit. Make a further understanding of the selected PLC and be familiar with related instruction function. Also, these instructions need tobe used well. Then write a reasonable program through “ GX Developer ” according to the control requirements. In the process of the design, the “ Touch Screen Technology ” should also be used. F irst ly, some knowledge about touch screen should be acquired. Then attempt toknow its principles of working. Finally, make i