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RFID wireless radio frequency identification technology

RFID wireless radio frequency identification technology uses radio frequency for non-contact two-way communication to exchange data to achieve the purpose of identification. Compared with the traditional magnetic card, IC card or bar code identification method, RFID has the characteristics of long-distance and non-contact identification, and is highly adaptable to the environment. Through reasonable design, it can work in various harsh environments and has excellent identification. effect. RFID does not require manual intervention during the work, and is suitable for automatic data collection of the system. At the same time, it can identify high-speed moving objects and simultaneously identify multiple electronic tags, which is quick and convenient. RFID truck frame management application technology uses these advantages of RFID technology for intelligent management.

   The RFID reader sends a microwave inquiry signal to the electronic tag through the antenna. The electronic tag is activated by the microwave energy of the reader, and responds after receiving the microwave signal and sends out an echo signal with tag data information. The basic feature of radio frequency identification technology is to use radio technology to identify stationary or moving objects, to determine the identity of the object to be identified, and to extract the characteristic information of the object to be identified. At present, it has been widely used in many fields such as automobile production, transportation control management, industrial automation, warehousing and logistics.

The RFID truck frame management system is a Sinotrans container truck frame management and control system based on RFID technology. Based on the successful application experience of RFID in other fields, it will combine the needs of Sinotrans container truck frame management with automation, advancement, and Based on the principles of stability and scalability, it will realize automatic identification, tracking and monitoring of container truck frames around core business requirements. The core of this system is to install RFID readers and RFID antennas on the front of the container truck, install RFID electronic tags on the frame, and realize the monitoring and management of the frame through the identification of the electronic tags by the reader. The RFID electronic tag is installed on the frame near the front of the car, and the appropriate installation position is selected according to different frame structure characteristics. At the same time, the frame is made of metal, which requires metal-resistant electronic tags. In order to ensure that the electronic tag is not damaged during the use, storage and transportation of the frame, the structure of the frame itself is fully utilized to achieve the protection of the electronic tag. For the frame that does not have a protective position, on the premise of taking into account the reading performance, a metal baffle or buffer rubber is installed to form a protective effect on the label.

  The electronic label comes with 3M double-sided tape, and according to the material and environment of the attachment surface, the imported double-sided tape with high metal adhesion and high temperature resistance can be selected, which can be directly pasted on the frame, which is convenient to use and reliable in performance. The RFID antenna is installed at the front of the car close to the frame. Because the RFID antenna itself is larger than the electronic tag, it is not easy to find a suitable protective location on the front of the car to install, and in the daily use of the vehicle, collisions will inevitably occur, which may easily cause damage to the equipment installed on the front of the car . In order to avoid such accidental damage as much as possible, the system will adopt an RFID antenna constructed with a thick metal alloy on the back of the frame, which has greatly improved its endurance and has a strong adaptability to industrial environments. UHFRFID reader is the core equipment of this system. The application on container trucks should be able to meet vehicle-level application specifications, including dustproof, waterproof, and vibration-proof adaptability, and can adapt to voltage and current fluctuations. The equipment shell must Sturdy and durable, anti-corrosion, suitable for outdoor environment such as high and low temperature.

   RFID reader can be installed in the cab, connected to the RFID antenna through the radio frequency cable, and realize the acquisition of RFID tag information, so as to realize the supervision of the frame. Before using the system, you need to complete the initialization of the electronic tag information. According to Sinotrans’s rules or specifications for frame management, write the unique identification code of the frame into the electronic tag, and install the electronic tag on the corresponding frame. Complete the establishment of initial data information. In this system, the RFID reader is connected to the vehicle terminal through the serial port, and the data read by the RFID will be uploaded to the vehicle terminal in real time. After the container vehicle is started, the RFID reader begins to work; when the frame with the RFID electronic tag is connected to the front of the car, the electronic tag enters the recognition range of the reader, and the data read by the reader is fed back to the vehicle Terminal, the vehicle-mounted terminal sends the data to the back-end database after processing to complete the "carriage task" of the frame.

   After the frame completes the "boarding task", the RFID reader can, according to system requirements, upload the read tag information to the on-board terminal at intervals of time to update the working status of the frame in real time. After the frame completes the task, it will be transferred away, and the RFID electronic tag on the frame will leave the reading range of the RFID reader. At this time, the RFID reader cannot detect the existence of the electronic tag, and the vehicle terminal cannot receive and read or write. The tag information returned by the driver indicates that the frame has completed the "get off" operation. A complete work cycle of the frame ends, and the system updates and saves this information in real time to achieve the purpose of real-time supervision of the frame. RFID readers need to have a wide range of power adjustments to ensure that other frame electronic tags will not be misread by adjusting the power without affecting the reading performance.


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