[信息与通信]基于PLC的自动售货机的设计.doc

河北化工医药职业技术学院毕业论文 基于PLC的自动售货机的设计 作者姓名: 刘华钊 专业班级 机电30802 学 号 15 指导教师 耿惊涛 杨辉静 陈冬 成 绩 2010 年11 月 BASED ON PLC VENDING MACHINE DESIGN Name: Liu huazhao Professional Class 机电30802 Student ID 15 Instructor Teacher Geng jingtao Yang huijing Chen dong Results 2010年 11 月 基于PLC的自动售货机的设计 摘 要 随着社会发展与科技的不断进步,自动化商业机械也有了越来越广泛的应用,自动售货机作为自动化商业机械的代表被广泛用于公共场所,人们通过自动售货机可以买到自己想要的物品,自动售货机实现了商品需求化,性能多样化的发展,给人们的生活带来了极大的方便。 本设计将PLC应用到自动售货机中,使之完成交易。其中系统主要包括：计币系统、比较系统、选择系统、饮料供应系统、故障检测系统、验伪系统、退币系统等。自动售货机最基本的动能是对投入的货币进行计算,并根据所投入的货币数值判断是否能购买某种商品,并做出相应的反应,因此,售货机能够辨识机内包含的商品,对所投的币值惊醒累计,并提供顾客所要购买的物品。当按下选择饮料的按钮后(假如选可乐2.5元/瓶),售货机会根据投入的钱(钱币不足时,会提示顾客要加钱 )同时启动电机和电磁阀,提取饮料到出货口,顾客取出商品,按下退币按钮,退出剩余的钱,完成此次交易。顾客也可以根据需要继续购买饮料。 关键字：PLC,自动售货机 BASED ON PLC VENDING MACHINE DESIGN  Abstract  With the social development and technological advances in the automation of business machinery has also been more widely used, automated vending machines as a representative of commercial machines are widely used in public places, people can buy through the vending machines they want items, vending machines, to achieve the demand of goods, performance, diversification of development, peoples lives has brought great convenience.  The design will be applied to vending machines in the PLC, so that to complete the transaction. One system includes: meter currency system, compare systems, selection system, beverage supply system, fault detection system, pseudo-examination system, the coin system. Vending machine is the most basic input kinetic energy to calculate the currency and the monetary value based on the input to determine whether to buy a product and make the appropriate response, therefore, contained within the vending machine can identify the goods of The total investment currency awakened, and provide customers to buy items. When you press the select button drinks (Coke, if