The Wireless Access Control System Based On Zigbee

The access control system is one of the important researches in the field of intelligentcontrol. It also has important practical value and application prospect. The traditionalaccess control implements rights management based on people, Aiming at the latestdevelopment of intelligent building, the parking management system is also included in theresearch category of the access control system (vehicle access). Therefore, the maincontents include two parts: a personnel access system and vehicle access control system.The former mainly forbids illegal personnel and provides access rights to legal personnel.And the latter mainly includes vehicle rights management, vehicle positioning and track ofthe movement path. Due to access nodes’ construction, deployment, accuracy and costconstraints, it’s hard to balance all the aspects. Therefore, it is very necessary to the studyand improvement the existing access control system, and constantly tries new technology.1) The paper study access control system for intelligent control field which relies on theprovincial and municipal science and technology projects. The main research contentsinclude the following aspects:2) Analyze ZigBee wireless protocol framework. After studying the specific function ofeach layer communication protocol and application, the paper uses a feasibilitysolution to resolve ZigBee wireless technology faults in the practical application(combination of wired and wireless) inspired by WI-FI framework.3) Using characteristics of mobile vehicles and static parking anchor node, aiming at theproblem of vehicle location and path tracking, In this paper, the so-calledRRMCL(RSSI Rank Monte Carlo Localization) localization algorithm is proposed,which is about WSN applications where target nodes are moving while anchor nodesare static. The algorithm based on MCL divides communication region to reduce thesize of sampling area by using the monotonic decreasing relation between RSSI valueand the distance. In order to avoid localization failure caused by anchor nodecollinearity, the algorithm puts forward a constraint strategy which brings Collinearity Impact Angle. The simulation results show that the proposed RRMCL can effectivelyreduce sampling area and improve the localization accuracy and speed, comparingwith existing MCL and MCB algorithms.4) Design a wireless staff access control system based on ZigBee technology and vehicleaccess control system based on RRMCL algorithm. This paper describes the wholestructure of the wireless access system based on wireless sensor network framework,and presents a detailed design scheme of hardware and software. Hardware aspects:the network controller and on-site controller hardware circuit of staff access controlsystem are analyzed in detail, ZigBee rf circuit module was also designed, and itdesigned vehicle positioning anchor node in the vehicle access control system.Software aspects: according to four layers architecture, the paper analysis systemsoftware design, which transplantated ZigBee protocol stack and lwip stack, designedCAN bus protocol, And write the hardware driver module. The system had beenapplied to yangzhou mall, which had achieved good application effect.