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1. Technical introduction
RFID radio frequency identification technology is an automatic identification technology that has matured from the 1980s. It uses radio frequency for non-contact two-way communication and exchange of data to achieve identification purposes. 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 recognition does not require manual intervention, and is suitable for automatic data collection of the system. At the same time, it can recognize high-speed moving objects and can recognize multiple electronic tags at the same time, which is fast and convenient. The basic working principle diagram is as follows:
The RFID reader/writer 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 realize the identification of stationary or moving objects, to achieve the purpose of determining the identity of the object to be identified and extracting 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.
2. Project application
As an agent of Trimble & ThingMagic, Shenzhen Quanshunhong Technology Co., Ltd. provides UHF UHF RFID products to meet the application of this system. The system is a Sinotrans container truck frame management and control system based on RFID technology. It will be based on the successful application experience of RFID in other fields and combined with Sinotrans’s own requirements for container truck frame management. It will be automated, advanced, stable, and reliable. Expansibility is the principle, centering on the core business needs, to realize the automatic identification and tracking monitoring of the container truck frame.
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 system design diagram is as follows:
2.1 RFID electronic tags
The RFID electronic tag is installed on the frame near the front of the car, and the appropriate installation position is selected according to the structural characteristics of the different frame. At the same time, the frame is made of metal, which requires the use of anti-metal 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.
2.2 RFID antenna
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 position 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 greatly improves the endurance capability and has a strong adaptability to the industrial environment.
2.3 RFID reader
UHF UHF RFID reader is the core equipment of this system. The application on container trucks should be able to meet vehicle-level application specifications, including dust-proof, waterproof, vibration-proof adaptability, and can adapt to voltage and current fluctuations. , The equipment shell must be sturdy and durable, anti-corrosion, and adapt to the requirements of outdoor environments such as high and low temperatures.
The RFID reader can be installed in the cab (so the RFID reader is not shown in the above schematic diagram), connected to the RFID antenna through a radio frequency cable, and achieve the acquisition of RFID tag information, thereby realizing the supervision of the frame.
3. System flow
Before using the system, you need to initialize the electronic label information. According to Sinotrans’s rules or specifications for frame management, write the unique identification code of the frame into the electronic label, and install the electronic label 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 starts 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 has completed the “carriage task”, the RFID reader can upload the read tag information to the car terminal at intervals according to the system requirements to update the working status of the frame in real time.
After the frame completes the task, it is 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 accept reading and writing. The tag information returned by the driver indicates that the frame has completed the “getting off” operation. At the end of a complete work cycle of the frame, the system updates and saves this information in real time to achieve the purpose of real-time supervision of the frame.
In this system, the RFID reader/writer needs to have a wide range of power adjustment to ensure that the electronic tags of other frames will not be misread by adjusting the power without affecting the reading performance.
4. Hardware equipment
This system is based on UHF passive RFID technology, and the hardware equipment includes RFID electronic tags, RFID antennas and RFID readers.
4.1 RFID electronic tags
TAG-915M01 is a tag specially designed for complex environments such as metals. It has the characteristics of long reading distance, high sensitivity, and excellent physical properties. It can be easily applied to metal asset equipment management, vehicle management, logistics and other occasions.
4.2 RFID antenna
RFA915-6H70A is a general-purpose antenna suitable for UHF band RFID applications. It has the characteristics of high gain and low standing wave. The appearance is beautiful and small, the double waterproof design of waterproof ring and silica gel is adopted, and the shell adopts a ribbed design, which is suitable for use in various harsh environments. It can be easily applied in UHF frequency band RFID occasions such as vehicles, warehousing, logistics, and retail.
4.3 RFID reader
ThingMagic-Vega is a vehicle-level RFID reader. It has passed the automotive industry standard: TS16949. It has a built-in high-performance M5e UHF RFID module and meets the requirements of harsh environment operating standards. It is very suitable for deployment in forklifts and various automotive applications. superior.
As a leading RFID brand-Trimble’s ThingMagic agent, Shenzhen Quanshunhong Technology Co., Ltd., while providing all major operators/integrators with ThingMagic’s full range of products, is committed to cooperating with operators/integrators to promote ThingMagic Frequency RFID equipment is applied to various applications in vehicle management, smart transportation, aviation shipping, warehousing logistics, clothing retail, manufacturing, anti-counterfeiting and traceability.
With a professional technical team, high-quality service and preferential prices, Shenzhen Quanshunhong Technology provides our customers with world-class RFID equipment solutions and high-quality after-sales service.
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