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System composition, working principle and program introduction
1. System composition:
(1) ML-T250 long-distance reading and writing electronic door seal
The electronic door seal recorded with the container number, truck number and other attribute data is installed at the opening and closing door of the carriage. The method of use is not much different from traditional locks, except that a remote reader is required to seal before shipment.
(2)GPRS reader
Install a communication box that integrates RFID and GPRS communication modules on the inner side of the car door (near the door) (GPS positioning module can be added if necessary), which is used to maintain communication with the electronic door seal and send real-time electronic door seal status information to the background monitoring Center. Both the electronic door seal and the communication box use anti-violent disassembly alarm technology: once these two devices are disassembled by external violence, they will actively send an alarm message to the monitoring center.
(3) Antenna
In order to ensure the reading of container tag data, an RFID reader antenna must be installed on the top of the carriage close to the reader to read the RFID tag information installed on the electronic door seal of the carriage.
2. Program introduction:
At the origin, the shipper, after loading the transported goods, uses an electronic door to seal the upper container door (press the latch), and uses a fixed or hand-held reader to send a series of encrypted instructions to seal it. After the sealing is successful, the electronic door seal label will actively feedback a signal, indicating that the electronic door seal has been successfully sealed. During the transportation of goods, the electronic door seal continuously sends status signals to the communication box, and the communication box sends the information to the background monitoring center through the built-in GPRS module. If the status changes midway, the owner or transporter can receive the alarm information as soon as possible and quickly take corresponding measures. At this time, the background monitoring center will fully understand the batch, quantity, driver and escort of the batch of goods, and unlock Time, etc., if the communication box is loaded with a GPS module, you can also know the location of unlocking, which is of great significance for it to take corresponding safety measures. After the goods arrive at the destination, the consignee unlocks the lock according to the received unlocking instruction (the unlocking instruction is sent by the monitoring center or generated and used in each terminal according to a public key system)
System functions, features, advantages
1. System function:
Tracking: According to the information of the electronic door seal installed on the container, the logistics can be tracked and managed.
Inquiry: The container can be inquired at any time (such as the time of entry and exit, vehicle number, container number and other relevant data information, etc.).
Modify: The basic information of the container corresponding to the label number can be modified.
Delete: delete the container information for which the transportation task has been completed.
2. System features:
2.1 The particularity of the application of RFID technology in container transportation:
(1) The electronic tag flows with the container, and the working environment is relatively harsh: high temperature, high humidity, acid and alkali corrosion, large vibration, etc.;
(2) Containers move faster, requiring the ability to recognize high-speed moving objects;
(3) The container number is the unique identifier of the container, and also the only identifier of the container transportation management object. It requires accurate and error-free identification of the container number.
2.2 System characteristics:
Long distance: The effective recognition distance is 2～50m, the recognition distance is adjustable.
Anti-collision: Advanced anti-collision technology can identify more than 50 signs per second at the same time.
High speed: The maximum recognition speed can reach 200 km/h.
Security: The built-in GPRS wireless communication module can understand the cargo transportation status in real time, and learn about abnormal conditions at the first time; encryption algorithms and authentication ensure data security and prevent link eavesdropping and data cracking.
Directionality: Within the effective recognition range of the reader, the placement direction of the electronic lock has no effect on the recognition rate.
High reliability: -40℃-85℃, anti-shock.
Cost: All 0.18uM chips are used, so the cost is lower.
Power consumption: ultra-low power consumption, healthier and safer.
Transmission: The ISM microwave frequency band is open worldwide, no application and payment are required.
High anti-interference: no special requirements for various interference sources on site
3. System advantages:
(1) RFID has strong environmental adaptability, strong anti-interference ability, and can be used all-weather, hardly affected by pollution and humidity.
(2) Fast recognition speed and high recognition accuracy
(3) RFID has the characteristics of large information capacity, high confidentiality, strong durability, high reliability, and multi-target recognition.
These characteristics of RFID make it the best choice for automatic container identification technology.
System hardware equipment introduction
1. ML-T250 long-distance reading and writing electronic door seal
ML-T250 electronic door seal provides a new development method for the development of automatic identification system. This product is specially developed and designed for the container management of logistics transportation. ML-T250’s leading reading and writing technology, full industrial design and outstanding features give it a comprehensive competitive advantage in the fields of vehicles, logistics, equipment and personnel tracking and identification, and create new value advantages for customers.
technical parameter
1.1. Electrical characteristics
Quiescent current is less than 2μA
Working current is less than 15mA
Battery life 3-5 years (lifetime 20 years)
1.2. Microwave link characteristics
Signal modulation method GFSK
Communication rate two-way 1024Kbit/s
Working frequency 2.45GHz
Maximum output power 0dbm
Bit error rate 10-9
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