RFID radio frequency identification technology is to use radio frequency for non-contact two-way communication to exchange data in order to achieve the purpose of identification. Compared with the traditional magnetic card, IC card or bar code identification methods, RFID has the characteristics of long-distance and non-contact identification, and has strong adaptability to the environment. Through reasonable design, it can work in various harsh environments and has excellent identification effect. RFID identification works without manual intervention, which is suitable for automatic data acquisition of the system. At the same time, it can identify high-speed moving objects and multiple electronic tags at the same time, and the operation is fast and convenient. RFID truck frame management application technology makes use of these advantages of RFID technology for intelligent management.
The RFID reader sends a microwave query signal to the electronic tag through the antenna. The electronic tag is activated by the microwave energy of the reader. After receiving the microwave signal, it responds and sends an echo signal with tag data information. The basic feature of RFID technology is to use radio technology to identify stationary or moving objects, so as to determine the identity of the object to be identified and extract the characteristic information of the object to be identified. At present, it has been widely used in automobile production, transportation control and management, industrial automation, warehousing and logistics and many other fields.
RFID freight car frame management system is based on RFID technology, the Chinese and foreign container truck frame control system, will be based on reference RFID in other fields of successful application experience, combined with the domestic and foreign truck frame management needs, with automation, advanced, stability, expansibility as the principle, around the core business needs, Realize the automatic identification, tracking and monitoring of container truck frame. The core of the system is to install RFID reader and RFID antenna at the front of the container truck, and RFID electronic tag on the frame. Through the identification of the electronic tag by the reader, the monitoring and management of the frame can be achieved. The RFID electronic tag is installed near the front of the frame, and the appropriate installation position is selected according to different frame structural characteristics. At the same time, the frame is made of metal and anti metal electronic labels shall be adopted. In order to ensure that the electronic label will not be 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 label. For the frame without protection position, on the premise of taking into account the reading performance, install metal baffle or buffer rubber to protect the label.
The electronic label comes with 3M double-sided adhesive tape. According to the material and environment of the attachment surface, imported double-sided adhesive tape with high metal adhesion and high temperature resistance can be directly pasted on the frame, which is convenient to use and reliable. The RFID antenna is installed at the front of the vehicle near the frame. Because the volume of RFID antenna is larger than that of electronic tag, it is difficult to find a suitable protective position on the front of the vehicle for installation. However, collision events are inevitable in the daily use of the vehicle, which is easy to cause damage to the equipment installed on the front of the vehicle. In order to avoid such accidental damage as far as possible, the system will adopt RFID antenna with thickened metal alloy structure on the back of the frame, which greatly improves the tolerance and strong adaptability to the industrial environment. UHF RFID reader is the core equipment of the system. Its application on the container truck shall meet the vehicle specification level application specifications, including dust-proof, waterproof and anti vibration adaptability, and be able to adapt to the fluctuation of voltage and current. The equipment shell must be durable, corrosion-resistant and adapt to the outdoor environment requirements such as high and low temperature.
The RFID reader can be installed in the cab, connected with the RFID antenna through the RF cable, and obtain the RFID tag information, so as to realize the supervision of the frame. Before the system is used, it is necessary to initialize the electronic tag information, write the unique identification code of the frame into the electronic tag according to Sinotrans’s rules or specifications for frame management, and install the electronic tag on the corresponding frame to complete the establishment of initial data information. In this system, the RFID reader is connected with the vehicle terminal through the serial port, and the data read by RFID will be uploaded to the vehicle terminal in real time. After the container vehicle is started, the RFID reader starts to enter the working state; When the frame equipped with RFID electronic tag is connected with the front of the vehicle, the electronic tag enters the identification range of the reader / writer. The reader / writer will feed back the read data to the on-board terminal. After processing, the on-board terminal will send the data to the background database to complete the “boarding task” of the frame.
After the frame completes the “boarding task”, the RFID reader / writer can load the read tag information to the on-board terminal at an interval according to the system requirements, and 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 / writer. At this time, the RFID reader / writer cannot detect the existence of the electronic tag, and the on-board terminal cannot receive the tag information returned by the reader / writer, that is, it is judged that the frame has completed the “get off” operation. At the end of a complete working cycle of the frame, the system updates and saves these information in real time to achieve the purpose of real-time supervision of the frame. The RFID reader / writer shall have a wide power adjustment range to ensure that other frame electronic tags will not be misread on the premise of not affecting the reading performance through power adjustment.
Responsible editor: CT