基于plc的自动无人售货机设计

下载后可任意编辑毕业设计(论文)任务书 设计（论文）题目： 基于 PLC 控制的自动售货机设计 下载后可任意编辑基于 PLC 控制的自动售货机设计摘 要 讨论开发基于 PLC 的自动售货机，售货机的主要组成部分包括钱币识别系统，找零系统，商品驱动机构，商品贮存装置以及控制系统。钱币识别系统将钱币转化为信号并交给 PLC 处理，通过 PLC 完成钱币的加减找零。用户投足币并选择产品，PLC 通过程序控制以及外部元件动作完成自动售货的整个过程。考虑产品总数，设定面板样品以及按钮预留位置。设定自动售货机内部储物通道数量，根据储物通道数量统计商品驱动装置数量。总体统计 PLC 输入点输出点大致使用数量，设定 PLC 输入点与钱币识别信号、按钮等的对应关系，输出点与指示灯、马达、继电器、找零器等的对应关系。使用 S7-200 编程软件完成程序编写，使用 AUTOCAD 设计 PLC控制柜，设计自动售货机整体机身以及内部构造，设计电气图。 关键词： 智能抢答器, PLC, 顺序功能图, 梯形图, I/O 点的分配 DESIGN OF VENDING MACHINE BASED ON PLC CDNTROL下载后可任意编辑ABSTRACTResearch and development of PLC-based vending machine . Integral part of vending machine consist of coin identification system, change system, the driving mechanism of goods, product storage equipment, and a control system . Coin recognition systems change coins into signal and abandon PLC to dispose .Completed the addition and subtraction of coins via PLC. Users put enough coin into vending machine and select products. PLC control the whole automatic sell process through the programming and exterior organ. Consider all products to setting the buttons of the goods samples .Set the number of channels to keep in storage of the vending machine. Statistics the number of goods power plant according to the number of channels. Overall statistics PLC input and output points roughly and set the correspondence between the PLC input point and the coin identification signal、buttons and so on. The correspondence b...