Talking about the role of radio frequency identification technology in the access control system
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The access control system applies radio frequency identification technology, which can realize that vehicles with effective electronic tags do not stop, which is convenient and time-saving, and improves the efficiency of intersections; more importantly, it can monitor the vehicle entry and exit of the community or parking lot in real time and accurately verify The identity of the vehicle and the owner of the vehicle is maintained, and the regional public security is maintained, so that the security management of the community or parking lot is more humanized, informatized, intelligent, and efficient.
Based on the characteristics of radio frequency identification technology, the application model of radio frequency identification technology in the access control system is proposed, and the realization of software and hardware is emphasized. The system has the advantages of high recognition accuracy, strong anti-interference ability, and reliable communication.
Radio Frequency Identification(RFID(That is, RadioFrequencyIdentification) technology is the specific application and development of automatic identification technology in radio technology. Its basic principle is to use radio frequency for non-contact two-way communication to achieve the purpose of identification and data exchange? .So it can realize multi-target recognition, moving target recognition and remote real-time monitoring and management. The communication distance can be from a few centimeters to several tens of meters. Its main advantage is that it has strong environmental adaptability and is less affected by rain, snow, hail, dust, etc. It can work around the clock, and it can complete automatic identification, tracking and management without contact. Penetrate non-metallic objects for identification, with strong anti-interference ability.
With the continuous improvement of living standards, cars began to enter the family in large numbers. With the rapid increase in the number of cars in Chinese cities, the management of vehicles has become a problem. For effective management of vehicles, the core issue is how to identify vehicles. This article introduces an access control system based on radio frequency identification technology. The application of RFID technology to the management of access control can effectively realize the rapid and reliable identification of vehicles and make the management of access control in security efficient and intelligent.
1 System hardware configuration
The radio frequency access control system is composed of six parts: on-board electronic tags, car sensing coils, radio frequency interfaces, signal processing, control systems and management systems.
1.1 Electronic label
Electronic tags are usually called transponders. It stores the basic information of the vehicle and the owner, and is installed on the vehicle as a passive tag. When the electronic tag enters the microwave query signal coverage area of the reader, the energy obtained by the electronic tag through the induced current sends the information stored in the chip to the reader, and the effective reading distance is 6-10m.
1.2 Reader
The reader includes two modules: radio frequency interface and signal processing.
The radio frequency interface is mainly responsible for signal transmission and reception. It receives the command signal from the signal processing and control system, converts the command signal into a microwave signal and sends it out; at the same time, it also receives the microwave reflection signal from the electronic tag, and converts the microwave reflection signal into a digital signal and sends it to the signal processing module for decoding deal with.
The signal processing module is mainly responsible for processing command signals and electronic label data signals. It receives the command signal from the management system, encodes the command signal and sends it to the radio frequency interface, which is converted into a microwave signal and sent out; at the same time, it also receives the electronic label data signal from the radio frequency interface, and decodes the electronic label data signal Send it to the management system.
1.3 Management System
The management system is mainly responsible for processing user information electronic label data and control system information. It controls and manages the system according to user instructions, receives data from the signal processing module and control system, and sends the instruction signal to the signal processing module and control system. At the same time, the management system can communicate with the security center through the network.
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