毕业论文（设计）基于PLC的停车场车位控制系统设计.doc

基于PLC的停车场车位控制 系统设计 Design of Control System for Parking Spaces Based on PLC 摘 要 随着汽车工业的迅猛发展，我国汽车拥有量急剧增加，很多城市出现了停车难问题，停车场成为交通系统中重要的一部分。停车场车位控制系统是以计算机和PLC作为控制器，实现对车辆进出停车场的自动登记、收费、计数以及车位引导的一种停车系统。 本课题针对小区停车问题设计出了一个基于PLC的中小型停车场车位控制系统。该系统从功能上来说分为停车场外部的出入控制系统和停车场内部的车位引导系统。出入控制系统主要负责统计停车场内剩余车位的数量并将其显示以控制的出入，主要包括传感器、PLC计数系统、七段数码显示、红绿指示灯，道闸栏栅等；车位引导系统则是负责当车进入停车场后引导车停在最优的位置，主要包括传感器、PLC控制器、计算机控制系统、LED显示屏等。 本文主要介绍了停车场控制系统各个部分主要实现功能、设备组成以及在硬件电路上的选择，同时阐述了PLC的输入输出分配，重点介绍了PLC外部硬件电路接线和软件编程设计，本文中软件编程语言用的是梯形图，直观易懂。整个系统设计思路清晰，结构紧凑，各部分原理简明通俗，对停车场车位控制系统的设计具有一定的参考价值和实际意义。 关键词：停车场 可编程控制器 车位引导 Abstract With the rapid development of the automobile industry, Chinas automobile ownership has soared. Many cities appeared parking problem, and parking become an important part of transport system. Parking lot control system is a parking system which is controlled by computer or PLC (Programmable Logic Controller) to realize the automatic registration, charges, count, and parking guidance. This article introduces a parking location system based on PLC to solve the actual problem. The system can be divided into two parts based on function, one which is out of the lot is designed to control the cars in and out, the other which is in the lot is designed to lead the car parking. Access control system includes sense organ、counter system, seven-segment display、green-red light system and so on; Parking guidance system is responsible for when the car into the car in the parking lot after guiding the optimal location, mainly including sensors, PLC controller, computer control system, the LED display and so on. This article mainly introduced the parking lot control system parts mainly realizes function, composition of equipment and the choice of hardware circuit, and expatiates the input and output distribution, the PLC is mainly introduced PLC external hardware circuit wiring and software programming design, this article software programming language used is the ladder diagram, straightforward. The whole s