Intelligent management scheme of radio frequency identification technology in parking lot
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With the social and economic prosperity and the continuous improvement of people’s living standards, transportation has gradually become an indispensable necessity in daily life. In recent years, the rapid growth of various types of vehicles, especially private cars, has become an important indicator of economic improvement. At the same time, the construction of transportation infrastructure and vehicle safety management are increasingly important topics that every urban construction planner is facing. The design of this program is based on the current internationally popular and domestic increasingly important industry-RFID (Radio Frequency Identification) Mature development and successful application. Its non-imitability, anti-interference, anti-impact, rapid identification, and intelligent discrimination will undoubtedly provide a brand-new solution for all kinds of parking lot management.
1. Project features
The biggest feature of the project is that it combines mature smart card technology, wireless communication technology, and advanced software technology, organically integrates various mature technologies, and applies them to actual engineering needs. In the management station, the non-contact smart ID card is used to automatically identify and manage the entering and exiting vehicles. Smart card management is the basis and direction of the information management of various management systems; in the user, the non-contact rapid identification of the vehicle and the identification of the user Automatic identification and comparison ensure the safety and protection of personal property, as well as the simplicity and speed of normal entry and exit procedures; the information source of each sub-management station and the processing terminal of the central management system are combined through a wireless bridge or internal network.
2. System function description
The device is divided into two parts:
One part is a microwave signal identification device, that is, the entrance and exit communicator, which can be installed above the entrance and exit of the control vehicle. The other part is an electronic tag. The system equips each parking user with a registered electronic tag, which can be installed in a proper position in the front windshield of the vehicle. There is an identification code inside the module.
When the vehicle reaches 6-8 meters from the entrance of the community, the vehicle detector detects the existence of the vehicle, activates the entrance communicator, and detects the identity code (ID) in the electronic tag of the coming vehicle. The ID is loaded in the form of microwave and transmitted to Communicator. The ID code in the owner’s electronic tag is preset in the information database of the communicator, indicating that the tag belongs to the parking lot, and the brakes are opened quickly and automatically, and the vehicle can pass smoothly without stopping. The entire system response time Only 0.9 seconds.
2.1 System composition
It is composed of an electronic tag attached to the car body, a transceiver antenna at the entrance and exit of the garage, a tag reader, a camera controlled and activated by the reader, a background management platform, and an internal communication network.
Central control room equipment (computer, management software, etc.)
Entrance equipment (entrance communicator, railing machine, vehicle detector, etc.)
Export equipment (basically the same as entrance equipment)
Electronic tags (same as the number of registered vehicles)
The RFID antenna is controlled by the reader to continuously transmit radio waves to search. When the vehicle passes through the warehouse transceiver, the on-board transceiver is triggered and transmits code information that can uniquely indicate the identity of the vehicle (such as license plate number, vehicle type, vehicle color, etc.). License plate color, bank account number, unit name, user name, etc.), and receive identification inspection, video storage information at the same time. After receiving the signal by the transceiver of the warehouse management station, it will be processed and transmitted to the computer system for data management and archiving. Inquire. Carry out information storage (in-warehouse) or information comparison (out-of-warehouse), and control the movement of the barriers at the entrance and exit after confirmation.
2.2 Function description
RFID technology provides independent and uninterrupted system services for parking lot management and security, ensuring that only licensed vehicles can pass. A digital management system for parking services and fee collection is realized. It can realize the control of all vehicles in the field and realize the computer vehicle information management; in the case of unattended, the system automatically records the time of entering and exiting the vehicle and the license plate number system parameter setting non-registered user vehicles; vehicle management problem vehicles always alarm; Collect and fully grasp the garage status and vehicle seat information through the portable reader; speed up the timely search and delivery of vehicles; strengthen the control and management of the vehicles with delayed rental fees; provide a complete record of every moment of appearance.
3. Performance indicators
3.1 Indoor terminal (reading collector)
Working frequency 902-928MHz
Working mode fixed frequency or frequency hopping (software setting)
Power range +25～+34dBm
The working distance can be up to 10m
Communication port RS-232: 1port9-pinDB-9Female
The maximum communication rate is 57600bps
Working voltage DC+5V current is less than 4 amps
Power adapter ACinput110～220V
Working temperature -30°～+80°
3.2 Vehicle terminal (identification card)
Working frequency 902-928MHz
Working mode: Broad-spectrum frequency hopping, fixed frequency mode
Programmable memory capacity 928Bits
Card base material ceramic package
Read and write response time Read 1.4ms Write 30ms
Anti-jamming performance anti-collision communication protocol; binary tree anti-collision mechanism. Number of reading cards ≥50/s
Working temperature -40°～+85°
4. Engineering features
The system has very high automatic control functions, strong anti-interference ability, high accuracy rate, small amount of engineering, strong resistance to damage, wide range of resistance to high and low temperatures, and strong ability to resist oil pollution during the implementation and installation process. The whole system is flexible and maneuverable.
For small single-entry management sites, the single Tao reading system can be used; for medium-sized management sites, multiple exits can be connected through data transmission lines; for large-scale management regions, additional readings can be added at the entrances and exits of each region by means of zone division. The device can realize the unmanned automatic management of the whole area, and the patrol statistics can be carried out through the handheld reader of the security personnel; for more safety considerations, the two cards of the person and the car are separated (especially suitable for long-term residents), and the identification system is only in the car card , The host card can only take effect after the comparison and identification match, which is a higher level of safety management.
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