机电一体化毕业设计（论文）-PLC车辆出入库管理系统设计.docVIP

南京信息职业技术学院 毕业设计论文 作者 学号 系部 机电学院 专业 机电一体化 题目 车辆出入库管理系统设计 指导教师 评阅教师 完成时间： 2012 年 05 月 18 日 毕业设计(论文)中文摘要 车辆出入库管理系统设计 摘要：本设计采用光传感器采集信号，使用完全PLC控制，完成了车辆出入库时的统计和显示工作。能够准确无误的进行计数，无论单个车辆怎样的往返运动，都不会出现误计数和漏计数，而且在人通过光传感器时不会误计数。为了节省单片机I／O口数以及数码管驱动，采用了HD7279键盘显示芯片。PLC采用了循环扫描的工作方式。最后采用两个LED做显示，能够显示车库内车辆的实际数量。为了防止意外计数错误，本系统采用反复程序校验，来提高系统的可靠性。首先，注意控制两个传感器之间的距离，用程序验证进出车库的是否是车辆，当人通过传感器时不计数；其次，采用逻辑互锁方式，启动加计数则要锁定减计数，产生加计数脉冲时则要锁定减计数脉冲，如此以保证可靠性；最后，及时的进行复位处理，以免车辆在传感器附近作往返运动时错误计数。 ：PLC；；智能控制；车辆出入库管理 This design uses the light sensor signal acquisition, use PLC control, complete vehicle storage and display of statistical work. To be able to accurately count, whether a single vehicle to move back and forth, there are no error count and counting loss, but also in people through the optical sensor without error count. In order to save chip I / O port number and the digital tube driver, using HD7279keyboard display chip. PLC uses a circular scanning mode. Finally, using two LED display, can display the actual number of the vehicles in the garage. In order to prevent accidents counting error, the system used repeatedly checking procedures, to enhance the reliability of the system. First of all, pay attention to control the distance between the two sensor, program verification of whether a vehicle into the garage, when through the sensor does not count; secondly, the logical interlock manner, starting with counting is to lock the minus count, and count pulse when the lock by counting pulses, so as to ensure the reliability of the final;, timely reset treatment, so as to avoid the vehicle in the vicinity of the sensor makes reciprocating motion error count. Key word：目 录 1 引言……................................................