Application of RFID recognition technology in automatic vehicle counting system
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Introduction
RFID consists of a reader and an electronic tag (Tag). RFID radio frequency identification technology is a wireless, non-contact automatic identification technology. The communication distance can be from a few centimeters to tens of meters, and it is almost unaffected by the weather environment. RFID electronic tags can input hundreds of bytes of digital information, which has extremely high confidentiality and is recognized in contemporary information technology. One of the five frontier technologies. By burning the license plate number of the transportation vehicle into the RFID electronic tag, when the transportation vehicle enters various transportation nodes such as intersections, unloading yards, storage yards, warehouses, etc., it can be performed through the RFID antenna (card reader) installed above the road Reading is completely separated from manual intervention, which improves the speed and accuracy of vehicle traffic counting. Compared with the license plate recognition technology of video and image processing, RFID-based vehicle recognition has high accuracy, is not easily affected by the environment, and can accurately and comprehensively obtain vehicle information.
1System principle
The electronic tag has written the basic information of the vehicle in advance through the card issuance management system, such as the vehicle ID, license plate number, vehicle owner, and fleet. And install the RFID electronic tag on the windshield of all vehicles at the entrance and exit. At this time, the vehicle has a unique ID card. Install recognition systems at all intersections, roads and other places where electronic license plates need to be recognized. The recognition system runs around the clock. When a vehicle with an electronic license plate enters the recognition area, the recognition antenna can capture the relevant information in the electronic tag and send it to the background in real time to help the background for further processing. If it is a vehicle that does not have an electronic tag installed into the system, the vehicle information will not be displayed. The system can cooperate with video surveillance to record the in and out operations of vehicles in real time.
The system consists of the following partial groups become:
RFID electronic label
RFID card reader
RFID electronic license plate recognition system
Image capture system
LED display system
Software management system
Language broadcast
The main features of the application:
Electronic license plates (RFID tags) use UHF (902～928MHz) passive cards, which can be used repeatedly for a long time without maintenance. The electronic license plate is installed on the front windshield glass of the vehicle with anti-dismantling technology, forming a unique correspondence with the vehicle, becoming the only electronic identity mark of the vehicle, and the vehicle’s identity information is strictly fixed on the vehicle. Using dual-card microwave coupling technology, the glass-medium electronic license plate and the air-medium driver card installed on the vehicle can work simultaneously in the same microwave environment, that is, to realize the supervision of the vehicle.
2System functions
By connecting the recognition system with the software management system, it can provide real-time vehicle information for the back-end system, count the number of vehicles at the crossing, and generate relevant counting statistics reports.
This system has the following technical advantages:
Work around the clock to meet the needs of industrial environments such as earthwork, coal mines, stone yards, sand yards, and docks;
The electronic label has the function of anti-dismantling, which can be destroyed as soon as it is dismantled; it can meet the anti-cheating situation;
The data in the electronic tag is encrypted to prevent data duplication;
System recognition rate under correct installation>99%;
Recognition distance>10m;
Recognition time <1S;
Correct recognition when the vehicle speed is less than 40km/h;
3Application effect
Through the implementation of RFID electronic license plate recognition systems at intersections and crossings, vehicles entering and exiting coal mines and earthwork construction sites are effectively managed, and the speed of vehicles entering and exiting intersections has been greatly increased, which fundamentally eliminates the phenomenon of vehicle registration and protects transportation companies and coal mines. Legitimate interest.
The RFID electronic license plate automatic counting system does not require manual invoices, which greatly improves the accuracy of counting, reduces the error of counting people, and prevents human cheating. This system can realize bicycle statistics and group statistics, settlement statistics, engineering materials management, etc.
The staff can check the standard of whether the vehicle is full in the monitoring room. This system saves time and improves efficiency, which is beneficial to vehicle owners and enterprises.
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