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Intelligent Vehicle Positioning and Speed Measurement System Solution Based on RFID Technology

I. Project Background

With economic and automotive technology development, more residents own cars, leading to severe traffic congestion that wastes time and causes frequent accidents. How to optimize road resources such as "fully utilizing road networks, shortening vehicle travel time, reducing traffic delays, ensuring driving safety, and improving road capacity" has become a key urban issue.

In addition, as enterprises expand, the number of delivery and operational vehicles increases, and managers pay increasing attention to risk control functions such as unauthorized use, overspeed control, and zone alarms.

II. Current Status and Comparison of Vehicle Positioning

Currently, typical methods are mainly based on GPS global positioning system and acceleration sensors. This is a mobile station-based positioning method—in-vehicle devices provide location information to the vehicle, which is then reported to the management system via wireless communication. This approach, where the positioned object actively sends location information, has the disadvantages of "high communication resource consumption and high system operation costs," and "in urban high-rise areas, under viaducts, tree-lined roads, and tunnels, temporary positioning blind spots may occur."

III. System Composition

The system mainly consists of the following components:

Vehicles equipped with RFID smart license plates

Wireless data transceiver nodes (RFID long-range readers)

CDMA modules

GIA system

Data processing unit

Data processing and control center

IV. System Operating Principle

The system obtains vehicle identity information by reading RFID electronic tags, uses a TODA-based multi-base station wireless positioning method to obtain location information, and obtains speed information by processing Doppler shifts.

Each RFID license plate stores information such as the license plate number, vehicle purpose, maximum load capacity, maximum passenger capacity, owner's name, and ID number. A certain number of wireless data transceiver nodes are deployed based on regional building characteristics and traffic flow to achieve maximum resource utilization.

Each wireless transceiver node sends encoded and modulated command signals at a certain frequency. RFID smart license plates within coverage receive the command, authenticate it, and send their UID. The node demodulates and decodes to obtain vehicle identity information, which is transmitted via a CDMA module to the data processing unit and then forwarded to the urban data processing and control center.

Multi-base station wireless positioning uses wireless data transceiver nodes to actively obtain vehicle location information, employing "Received Signal Strength Indicator (RSSI), Time of Arrival (TOA), and Time Difference of Arrival (TDOA)" positioning. The first step uses robust estimation methods to reduce interference; on this basis, the three wireless data transceiver nodes closest to the RFID smart license plate are identified, and their TDOA values are applied for a second positioning to obtain location information, which is transmitted to the control center to plot the vehicle's trajectory. Real-time speed measurement is achieved by estimating the Doppler shift generated by vehicle movement.

V. Related Hardware Products

  • FineJoin UHF RFID Tags
  • FineJoin RFID Long-Range Readers
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    FAQ

    In smart manufacturing, RFID is used for process tracking, tool management and production error-proofing. Fuen's HF and LF industrial readers are installed at production stations to read tags on trays and carriers in real time, automatically recording process steps and verifying parameters to prevent wrong material or sequence. Typical applications include PV ingot factory process management, automotive body tracking and non-standard automated inspection lines.
    RFID enables automatic inbound registration, outbound verification and real-time inventory. Fuen's UHF readers with gate portals (G15) batch-read tags as goods pass through without individual scanning. Combined with forklift retrofit solutions, location updates are completed during handling. Fuen has successfully implemented forklift RFID retrofit projects for Shen International Logistics Port, improving inbound efficiency by over 60%.
    RFID upgrades manual one-by-one verification to batch automatic inventory, significantly reducing missed inspection rates and labor costs. Fuen's mobile engineering vehicle tool management solution uses handheld terminals for full-vehicle inventory in one scan — 10 seconds versus 1 hour manually. In power grid asset lifecycle management, RFID tags attached to equipment enable full-process tracking from procurement to deployment to retirement.
    RFID anti-counterfeiting uses encrypted electronic tags on products combined with backend databases for item-level full-chain traceability. Fuen's fragile anti-transfer tag (UT203) is destroyed once removed, preventing tag reuse. Typical applications include live pig supply chain tracing and pharmaceutical anti-counterfeiting systems, providing full visibility from production through distribution to end consumption.
    RFID enables rapid receiving, smart inventory and anti-theft management in chain retail. Handheld terminals batch-scan inbound goods, completing full-store inventory in minutes. Fuen's clothing store solution combines HF tags and UHF handhelds for full-chain visibility from distribution center to store shelf, improving inventory accuracy to over 99%.
    RFID in smart cities mainly applies to vehicle management and public safety. Fuen's intelligent vehicle positioning and speed measurement system uses active tags for long-range identification and speed detection; e-bike anti-theft solutions track tagged vehicles via intersection readers for rapid recovery; parking management enables non-stop passage and automatic billing. These solutions are deployed in multiple cities.