Application of RFID in Zhejiang inland waters integrated supervision system
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With the application and development of the Internet of Things, especially the widespread application of RFID technology, it has had varying degrees of impact on people’s work and life, and has also provided a variety of integrated solutions for strengthening management in all walks of life. This article mainly introduces the application of radio frequency identification technology in the management of inland river vessels in Zhejiang from the aspects of business requirements, technology realization, function development, etc., for everyone to discuss.
1 System overview
Zhejiang is a major water transportation province. There are nearly 1,000 inland waterways in the province, with a waterway mileage of more than 10,000 meters. It has the Beijing-Hangzhou Canal, Hang-Shen Line, Changhu-Shen Line, Zha-Jia-Su Line, Hang-Hu Tin Line, Liuping-Shen Line, Qiantang In the main waterways such as Jiangxi, the number of ships operating in inland rivers has remained above 30,000 throughout the year. The number of ships is large, and the management area is wide and the quantity is large. Based on this background, the Zhejiang Inland Water Vessel Integrated Supervision System came into being. The system mainly implements automatic identification and dynamic integrated supervision of ships through the application of RFID technology.
2 System design
2.1 System architecture
(1) Network structure
The system network structure is mainly composed of municipal monitoring centers and on-site monitoring points. The network architecture diagram is shown in the following figure:
Figure 1 Network architecture diagram of automatic identification of ship supervision
(2) System data collection
Ship identification is completed through the onboard RFID tags, card readers, transmission network and the back-end ship integrated database. The data collection and transmission process is shown in the following figure:
Figure 2 Flow chart of ship identification data collection
2.2 System composition
The integrated supervision system of Zhejiang inland water vessels is mainly composed of electronic tags, radio frequency readers and management systems. The system composition diagram is as follows:
Figure 3 Composition diagram of ship identification system
2.2.1 Shipborne RFID electronic tags
Shipborne electronic tags are customized by the manufacturer according to management requirements, and a unique ID number is designed, which can be bound to ship parameter information through the RFID shipborne electronic tag management system. When the user uses it, the shipborne electronic tag should be installed in the designated location of the ship. The tag ID number is the ship’s ID card, and the ship identification is performed through the channel card reader and the shipborne electronic tag to collect ship data in real time.
2.2.2 Channel RFID Reader
As a data collection device for shipborne electronic tags, the channel card reader is mainly used to collect ID information of passing ships and upload data to the data collection server through wired or wireless data communication. The communication between shipborne electronic RFID tags and channel RFID readers adopts the 2.4G frequency band approved by the National Radio Management Committee and is widely used in transportation, industry, medical and other industries.
2.2.3 Data acquisition server control system
The channel card reader is connected to the data collection server through VPN/VPDN. The data collection server control system is responsible for receiving data from multiple channel readers, preprocessing, database storage and data release of the data received by the server, and finally providing it to Related system applications.
2.2.4 Channel Card Reader Management System
The channel card reader management system is mainly responsible for the management of the basic information and deployment information of the channel card reader, ensuring that all readers can be online normally, and the system that is not online will prompt an alarm to detect and diagnose the channel card reader equipment failures in time.
2.2.5 Shipborne electronic label management system
The shipboard electronic tag management system is mainly responsible for the issuance, recovery, loss reporting, cancellation, procurement, distribution, deployment, and reception management of shipboard electronic tags, and strictly manages the management of RFID tag cards.
2.3 RFID electronic label design
The shell of the shipborne electronic tag is designed as a rectangular parallelepiped with a size of 70cm*50cm*0.5cm. The front side is printed with the number representing the tag ID and the label production date, and the back side is 3M glue. Taking into account the practical application of ship management, we divide the labels into long-term cards and temporary cards, and distinguish them by color. The appearance color of the long-term card is designed to be off-white, and the appearance color of the temporary card is designed to be yellow. The off-white color is not easy to absorb the heat of sunlight, which helps to improve the life of the card, and the yellow color is used as a warning color to remind users to prevent loss.
Figure 4 A sample drawing of the electronic label design
2.4 Shipboard RFID tag installation
According to the on-site installation tests and summary analysis by professionals, RFID electronic tags are generally installed on the upper right side of the front windshield inside the cockpit of ships with a high recognition rate, and the working conditions are good and stable. Its installation position is shown in the figure:
Figure 5 Electronic label installation diagram
3 Main functions of the system
3.1 Ship real-time data collection function
The collection of ship real-time data is mainly realized through the channel card reader and the shipboard electronic tag. The channel card reader recognizes the ship by identifying the ID information periodically sent by the shipboard electronic tag, and collects ship data in real time.
3.2 Ship real-time data processing function
The collection and processing of ship RFID data are respectively completed through data receiving, analysis, preprocessing, and storage components. The data receiving component is responsible for the concurrent and two-way communication of multiple channel readers; the data analysis component is responsible for the analysis of the data communication protocol between the channel reader and the data collection server; the data preprocessing component is responsible for denoising and deduplication of a large amount of RFID data , Filter out non-compliant RFID data, reduce the amount of RFID data, record and publish RFID ship dynamic data based on the voyage (the number of times the ship sails through a fixed location); the data storage component is responsible for the storage and query of RFID ship dynamic data , Backup and other functions.
3.3 Ship real-time data supervision function
Through the shipboard electronic tags, the automatic collection of data on the ship’s operating status is realized, and it is matched with the back-end ship data center one by one, and the ship-related data information is retrieved to implement comprehensive supervision and automatic early warning of the ship. Preliminary realization of fixed-point positioning tracking management of ships and non-stop inspection of ship passage has improved the passage rate of ships and greatly facilitated ship owners.
4 Summary and outlook
In recent years, RFID technology has been widely used in industrial automation, commercial automation, transportation control management and other fields in the world. In my country, due to the late start of this technology, large-scale production and application have just started; RFID technology is used in Zhejiang inland watercraft The application of comprehensive supervision has only done some useful explorations, and has played a very good effect on automatic ship identification. The continuous and in-depth application of RFID technology in inland river ship management is of great significance, and it will also play a positive role in improving the efficiency and management level of ship management, especially in the realization of ship information collection, ship automation supervision, non-stop navigation inspection, and non-stop ship management. The application prospects of charging, ship certificate anti-counterfeiting, etc. are broad.
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