基于PLC的物料分拣系统设计.docxVIP

PAGE PAGE IV 基于PLC的物料分拣系统设计 摘要 物料分拣电气控制系统是完成配送、配送中心分拣、分拣和分配操作的现代化设备。是进行分拣配送业务的有力技术保障。目前，国内外几乎所有的大型邮局都配备有物料分拣电气控制系统。机械分拣也称为输送机分拣。它以机械为主要输送工具。物料分拣作业仍然依赖于手工作业。这种分拣方法多用于链式输送机、输送带、滚筒式输送机等输送机，其原理是利用地面设置的输送机进行物料的运输。物料分拣作业人员根据物料上的标签、颜色标签、编号和其他分拣标记，对符合提单要求的物料进行分拣。选择它并把它放在一个简单的传送带或现场。本系统基于一种可编程控制器PLC对物料进行自动分拣，采用西门子S7-300来完成，该系统主要由下料模块、送料模块、传送装置以及分拣模块构成。针对物料的基本特性：材质、颜色，进行分拣，用对应的传感器进行检查。此外，在系统中会遇到各种限位开关，全部使用开关代替。经过模拟仿真实验，该系统能准确的运行，分拣的准确，减少对物料的损坏，能完成对物料的不同材质、不同颜色自动分拣。 关键词：自动分拣；传感器；西门子S7-300 Abstract Material sorting electrical control system is a modern equipment to complete distribution, distribution center sorting, sorting and distribution operation. It is a powerful technical guarantee for sorting and distribution business. At present, almost all large post offices at home and abroad are equipped with material sorting electrical control system. Mechanical sorting is also called conveyor sorting. It uses machinery as the main conveying tool. Material sorting still depends on manual operations. This sorting method is mostly used in chain conveyor, conveyor belt, drum conveyor and other conveyors. Its principle is to use the conveyor set on the ground to transport materials. Material sorting operators sort materials that meet the requirements of bill of lading according to labels, color labels, numbers and other sorting marks on materials. Select it and place it on a simple conveyor belt or site. The system is based on a programmable logic controller (PLC) for automatic sorting of materials. It is completed by Siemens S7-300. The system is mainly composed of cutting module, feeding module, conveying device and sorting module. According to the basic characteristics of materials: material, color, sorting, using the corresponding sensors for inspection. In addition, in the system will encounter a variety of limit switches, all of which are replaced by switches. Through the simulation experiment, the system can run accurately, sort accurately, reduce the damage to materials, an