RFID electronic seals are more efficient in container security protection in Kaohsiung Port (Part 1)
chrispeng [ad_1]
There are more than one million transshipment containers imported and exported in Kaohsiung Port each year. Due to the geographical environment of the port area, it is divided into five container centers. When the transshipment containers are loaded and unloaded, they must be transported out of the port police inspection and registration station, and transported to other container centers through the taxation zone. This port feature is often used to engage in subcontracting and smuggling during transportation. In the past 10 years, the customs has seized an average of about 9 major smuggled eucalyptus items in re-export containers each year, which shows that smuggling is quite rampant. The customs has to adopt manual escort measures. Fifty thousand, the carrier has to pay considerable escort fees every year. In order to reduce the operating costs of carriers, speed up container clearance, and enhance the international competitiveness of Kaohsiung Port, Taiwan’s “Executive Yuan” Economic Construction Committee held a “Combination of Port Registration Station Image Identification System and Container Action” on May 29, 1992. After several negotiations, it was finally decided to replace manual escort with technological facilities. Kaohsiung’s “Port Authority” was responsible for the establishment of an “image recognition system” to automatically identify the number of containers and trailers. , The “Personnel and Vehicle Data Reading System” automatically recognizes the driver’s ID card number, and the Customs is responsible for building the “Electronic Seal Monitoring System” to automatically recognize the RFID electronic seal number. The Kaohsiung Port Automated Access Control System has been completed. The drivers, trailers and containers of the transshipment cabinets are fully monitored, and the chip memory of the RFID electronic seal contains an unchangeable unique ID number, which cannot be forged. Therefore, the customs can safely hand over the escorted transshipment cabinets to the automated access control system. At that time, the “Kaohsiung Port Transit Counter Free Escort Plan” will be implemented.
Kaohsiung’s “Customs Bureau” handled 4 bids for “electronic seal monitoring system” from 1993 to 1995. However, the successful bidder’s reading rate never reached the 95% pass standard and failed. The main reason was Taiwan Province. Domestic manufacturers have not yet mastered the key technologies for long-distance reading accuracy and stability of passive electronic seals. Taiwan’s “Executive Yuan” Economic Construction Committee instructed the Technology Division of the Ministry of Economic Affairs to conduct a technical evaluation. The results of the evaluation were deemed feasible, and it was decided that the Taiwan’s “Ministry of Economics” Technology Division would entrust the Zhongshan Academy of Sciences and the Information Technology Council to assist. The Kaohsiung Customs Bureau established the “Kaohsiung Port Transit Cabinet RFID Electronic Seal Escort Demonstration System”.
Challenge the limits of technology and innovative applications
Introduction of “Kaohsiung Port Transit Cabinet RFID Electronic Seal Escort Demonstration System”:
1. Build environment and requirements
Different from RFID applications in logistics and other fields, the system of the Kaohsiung Customs Bureau has the following severe conditions and system requirements which are the main reasons for the failure in the past:
Due to the incomplete cost and recovery mechanism, passive RFID system planning needs to overcome the effective reading distance of up to 7 meters.
When passing the inspection station at a speed of 60 km/h without stopping, at least 95% of the reading rate must be completed within 200ms.
It is a challenge to read all types of container locks with inconsistent metal background conditions and variations in seal positions.
In Kaohsiung Port, under the severe conditions of outdoor high temperature, high salinity, humidity and multiple typhoons, the existing RFID hardware must be able to support the system to operate 24 hours a day throughout the year.
The system must achieve high reliability and be integrated with the existing Kaohsiung Port Authority’s Online image recognition system, and must not affect the limitations of the existing system to overcome the technical bottleneck of the RFID system.
2. Full system design
At present, the security of containers inside and outside Taiwan Province is still dominated by mechanical structure locks without anti-counterfeiting functions. However, in foreign countries, the use of RFID solutions that cannot be copied with unique identification code characteristics are mostly applied at a price which is approximately higher than the price of traditional container seals. Forty times the active RFID solution, and the only more economical way to use it is to recycle it, but this adds additional administrative costs for tracking and management.
In addition, active systems must also consider technical issues such as battery life, which makes it difficult for active RFID electronic seals to be widely used. The current transshipment container entering and exiting the port area must cooperate with the customs to perform manual escort. The current operation process is both labor intensive and may give smuggling groups an opportunity. The electronic seal monitoring system is the transportation industry personnel who unload the container for storage or loading and export. When the RFID electronic chip seal is sealed, the electronic seal reading device reads the encrypted data of the RFID electronic chip seal and stores it in the electronic seal monitoring system; when the container truck arrives at the Hong Kong police inspection and registration station, the electronic seal is obtained through the system integration interface The data is encrypted by the code, and then compared with the license plate cabinet number, driver’s identity and other data received by the original automatic access control system to ensure that personnel and goods are not contracted.
With the world’s only and unforgeable chip code in the passive RFID electronic seal, it can be read by an RFID handheld device and can be read by the fixed RFID installed in the gate post when the container truck passes through the automated lanes of the port area. It can be read and automatically identified by the picker to achieve the benefits of automatic security escort. Once the passive RFID electronic seal of the container truck is damaged or not sealed or cut, it cannot be read. It is a highly secure container transportation escort method, which is in line with global containers. The development trend of transportation.
Figure 1. System architecture and main projects
3. Information flow design
Kaohsiung Port’s container escort is to send the import container list and the escort port container list to the transporter and the Kaohsiung Port Authority’s automated access control system through the electronic data exchange method of the container moving warehouse system. The personnel shall seal the RFID electronic seal of this eucalyptus when the container is unloaded for storage or when the ship is exported. When the container truck is towed away from the control station, the terminal operator will send the container (material) delivery order (C/N) outbound message The transfer cabinet moving storage system is distributed from the cabinet moving storage system to the automated access control system of the Port Authority. When the container truck arrives at the check-in station at the place of departure, the electronic seal reader reads the RFID electronic seal data sealed in the container, and compares the read electronic seal code data with the data received from the automated access control system from the warehouse system Yes, if there is a mismatch or cannot be read normally, the automated access control system will issue a warning, and the Hong Kong police or customs will handle the abnormality. If the reading is correct or the abnormality is handled, the container truck can quickly pass through the port police inspection and registration station, and send the container (object) delivery note (C/N) out of the zone information electronically to the destination through the automated access control system The Hong Kong police inspection registration station and the cabinet moving warehouse system, the RFID reading at the inspection station and the comparison with the OCR identification cabinet number will be respectively transmitted to the cabinet moving warehouse and the timely monitoring system, and when the shipment is completed, the cabinet moving warehouse system The AY/AL dynamic information will be sent to the monitoring system through the seal management system, indicating that the seal data has been written off.
Figure 2. Information flow integration between the system and the operating systems of Kaohsiung Port and Kaohsiung Pass
4. Electronic tag reading system parameters and performance simulation
For judging whether the tag can be read by the reader, it is related to the signal energy of the tag response. It is written in Matlab mathematical model and M-script language, which can be analyzed, visualized and developed, and the physics is established. The model is briefly described as follows:
The electromagnetic wave is first emitted by the reader antenna and then received by the antenna on the tag. The current on the induction coil causes the chip on the tag to respond to internal information, and then the radar wave is reflected back to the reader. After the reader’s antenna receives it, it gets the signal.
Figure 3. Development of simulation software to verify the RFID construction and installation environment of Kaohsiung Port
Figure 4. The front view when the reader reads the label
Figure 5. Side view when the reader reads the tag
When the reader receives a strong enough echo from the tag (that is, the Signal Power is greater than a certain threshold), it means that the tag can be read; but if you want to build a more realistic model, you must It is constructed according to the direction of the tag antenna surface and the direction of the reader antenna surface. That is, the antenna gain pattern (Antenna Gain Pattern) related to the angle is made according to the antenna surface. For the convenience of explanation here, regardless of the antenna area, the new model can be the same as the model plus the spatial geometric relationship.
According to the model constructed above, set a threshold value for Signal Power. Except when the tag is in a different position, other parameters are fixed, and an antenna envelope diagram can be formed in a three-dimensional space. If you want to simulate the antenna area, then It requires the use of integral calculations, which is more difficult to achieve for dynamic display.
(Text/Kaohsiung “Customs Bureau” Zhang Kecong, Taiwan “Chinese Academy of Sciences” Electronics Institute Li Mingtang)
[ad_2]
