Passive RFID UHF electronic tags have many advantages such as fast transmission rate, anti-collision, large-volume reading, motion reading, and low price. Therefore, the industry is considered to be the most potential development direction of RFID. With the help of RFID China Network "Passive UHF Electronic Label (860-960MHZ) large-scale brand shopping guide and CD-ROM e-book activity", we invited and edited this passive UHF typical application case manuscript for the industry. share it. This article refers to the address: http:// 4) Operation and control service layer—Processing and subsequent operations based on the obtained digital information, ultimately achieving management and service for the car and driver.
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Case Name: Hongqiao Airport Taxi Management System Based on UHF Band RFID Technology Implementation Time: March 2008-July 2009 Typical users: Urban Transportation Management Office, Urban Traffic Administrative Law Enforcement Corps, and various brigade and taxi company application cases Technical frequency range: 840.5MHz - 844.5MHz
The main features of the application case are as follows: 1. Realize the long-distance non-stop identification of the electronic certificate of the operating vehicle, change the mode of the close-up human-eye identification of the operating vehicle electronic certificate or the close-range machine-readable electronic certificate, and realize the vehicle in the normal operation of the vehicle. Management and service; 2. Combine UHF band RFID technology with VID technology to identify and clone taxis under long-distance dynamic conditions; 3. Two licenses for vehicle operation license and driver qualification certificate to realize the relationship judgment during driving. Accurate identification and determination of vehicle identity and driver identity information, prevention of driverless driving of the operating vehicle driver, and active taxi immobilization can be realized.
Problem solving and key technical breakthroughs: 1. The unique requirements of the two certificates (operating certificate, qualification certificate, hereinafter referred to as the two certificates) and the unique correspondence between the operation certificate and the identified vehicle; 2. Integration technology and unit technology in the actual road Reliability guarantee in the environment, in the actual road environment, the card reading distance can reach 25m or more, and the reading success rate is 99.97%. 3. The base station and the electronic tag have low maintenance work, that is, the base station is required to operate reliably and used. The electronic tag life of mass terminals is 5~10 years, which can meet the large-scale promotion.
4. It is required to find illegal driving vehicles and proactively prevent theft of operating vehicles in law enforcement. Therefore, it is necessary to achieve fixed matching and elastic matching between the two cards, and to conduct inspections on actual roads;
5. The base station can obtain the vehicle traffic photos and abstract the image vector to obtain the unique matching relationship between the read electronic certificate information and the captured photos in time and space, and use the image processing algorithm to obtain the physical license of the real vehicle. And comparing with the two certificates to automatically identify the cloned vehicle;
Introduction of independent intellectual property rights: First, the system is based on the “automobile digital standard source system†with independent intellectual property rights.
1. The system definition “automobile digital standard source†is called “the digital standard source of automobile identity information and management basic informationâ€. It has the function of “electronic ID card†of the automobile, so it is commonly called “electronic license plateâ€. It consists of two parts: physical structure and information structure: the physical structure of "automobile digital standard source" is a passive ceramic-based automotive electronic technology based on RFID technology and working in UHF frequency band (840MHz~845MHz, 920MHz~925MHz). label.
Figure: The “Car Digital Standard Source†physical structure diagram “Automotive Digital Standard Source†information structure is defined and planned according to the requirements of vehicle management and service, which not only realizes the needs of public security for vehicle management and service, but also It can realize socialized services for transportation, urban construction, insurance, taxation, environmental protection, mass owners and drivers. 
Figure: "Car Digital Standard Source" information structure diagram (first layer)
"Automobile Digital Standard Source System" is a digital information technology service system based on "car digital standard source".
2. System structure "Automobile digital standard source system" consists of four layers of "source layer", "base station cluster layer", "information transmission network layer" and "operation management and control service layer". 
Figure: "Automobile digital standard source system" structure
1) Source layer—Bind the car and driver through a dedicated electronic tag identification to abstract the car and driver into perceptible digital information.
2) Base station cluster layer - through the information sensing device can identify and perceive the identified vehicles and drivers 3) Information transmission network layer - through the network transmission and digital information mapping, the virtual abstract digital information is transmitted to a specific audience.
3. System working principle The vehicle digital standard source system is based on the vehicle automatic identification and certification service, and solves the “automatic identification and certification of vehicle identity†as the core, and provides the “open regional road traffic environmentâ€. Technology platform. 
The working principle of the system generally includes the following four steps: 1) Card issuance and card loading: By installing a digital standard source of the vehicle adapted to different models, a unique correspondence between the source and the vehicle is formed, the driver card is issued, and the dynamic matching of the vehicle and the driver is completed. The relationship between the formed car and driving identity information and the car card and driver card.
2) Information collection and acquisition: When the vehicle/driver passes through various types of acquisition base stations and checks the base station, the base station can obtain the card/driver card information and combine the base station point position and current event perception to form a car/drive information resource. (Combination of three kinds of information: vehicle/drive identity information, road network operation time and space information and event information).
3) Information transmission: The vehicle/branch information resource is transmitted to the predetermined information receiver through the information transmission network layer.
4) Management and service: The information receiver performs automatic processing and manual follow-up operations based on the obtained digital information, and finally realizes management and service for the vehicle and the driver.
Second, special multi-mechanism fixed, hand-held, vehicle-mounted inspection base station; Third, a set of special software; Fourth, local standard draft one "Shanghai taxi long-distance electronic operation permit fixed base station communication interface specification"; Draft II “Application Test Norm for Shanghai Long-distance Electronic Operation License for Taxiâ€.
Application effect: Shanghai Hongqiao Airport Taxi Electronic Operation Certificate Demonstration Base base station adopts multi-mechanism identification technology combining RFID technology and image license plate recognition technology. It was completed in June 2009, and completed 100 pilot qualifications of Shanghai Volkswagen Rental Company in July. The issuance and installation of the certificate and 50 taxi operation qualification certificates, and real-time transmission of inspection data to the data management platform of the Shanghai Urban Transportation Management Office; in November 2009, the first Institute of Telecommunications Science and Technology was entrusted to complete the electromagnetic field influence of third-party base stations. Range testing and interference testing for airport radio communications.
The system can achieve 24-hour unattended, automatic combat cloning car and taxi administrative enforcement functions. As of October 13, 2009, a total of 790,000 vehicles were inspected, including a total of 2,213 public taxis equipped with electronic operating licenses and 50 vehicles. In October 2009, the Shanghai Urban Transport Management Office and other organizations organized a real-time strike demonstration of six clones of taxis.