Wireless Vehicle Access Management System Based On PLC

In recent years, with the increasing popularity of the automobile in our country,the demand for convenience of vehicle access management and information recording is increasingly prominent. Nowadays, this kind of management is realized by two ways. One kind is realized by artificial wait or card way,Whether artificial wait and see record management mode or credit card way, when they get in or out, they need parking in the specific location, open the window, that make more trouble, and the speed will get slowly. Especially in the rainy days, cold weather, it will get some inconvenience to the driver and the staff. The other way is realized by computer image recognition software, but when the computer failured, the system cannot run normally,it is also influenced by the light and the license plate stained,or any other factors,and the cost is relatively high.In order to solve the above problems, This design aims to develop a new type of wireless vehicle access management system with low cost, when the vehicle through the door, Identity recognition device with a vehicle identification mark it carries the vehicle information is transmitted to the PLC through a wireless signal, PLC combined with the upper computer for management the access control and information recording. The system will be greatly improved convenience and security of the vehicle access management system.This paper first introduces a general wireless vehicle access management system function and structure diagram,then has carried on the detailed explanation to various parts. It is designed general interface module with Weigand26 protocol in vehicle identification receiver, it is can easily access to Wiegand output format recognition of information equipment Without any hardware changes, to left the space for system upgrade and improve. The design introduction the super heterodyne receiver module and the wireless transmission module PT2262,when the vehicle identification device in the PT2262 emission wireless signal with vehicles information, the signal adaptation module will receives the superheterodyne receiver output signal, and decoding then encoding output to PLC,PLC will recorded and stored, to achieve the vehicle access information record. The key to the design is the communication between wireless signal and PLC, also the communication between PLC and the host computer, this paper will introduce the communication between the wireless signal and Mitsubishi FX series PLC, and the communication between PLC and computer management. Secondly, based on the analysis of the system requirements, designed computer system function framework, database framework, using C# programming language and SQLServer 2008 database design and supporting the development of management software.Finally, we summarized the work have done, the lack of this wireless access control system has been analyzed, and put forward the improvement scheme of the system.The technology relates in this paper has obtained the authorization of utility model patents, interrelated invention patent has been accepted.