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Using RFID technology to replace traditional manual record management, realize remote, dynamic, and real-time equipment asset data collection, replace the front-end manual data collection of traditional asset management methods, and better integrate with back-end computer databases to form fully intelligent equipment assets Management system, thereby greatly improving equipment utilization, the operating cost of the system will be greatly reduced. As a bridge between the physical world and the existing IT system, RFID technology can effectively integrate daily asset management activities with the asset management system with the help of GPRS wireless remote transmission function, so as to achieve real-time synchronization of physical information and system information. Therefore, it has become possible to establish an asset management system based on RFID technology to realize automatic management. The rapid rise of RFID technology in recent years has made it possible to “transparency” in resource (asset) management.
As one of the most important components of corporate assets, fixed assets are an important guarantee for the completion of production and operation tasks, and at the same time have a significant impact on the financial status of enterprises. Therefore, strengthen the management of fixed assets, ensure the integrity, preservation, and appreciation of fixed assets, correctly calculate the number and value of assets, clarify economic responsibilities, supervise and promote the proper storage and reasonable use of fixed assets, and continuously improve the utilization and integrity rate of equipment. Giving full play to the effectiveness of fixed assets and bringing maximum benefits to enterprises is the core goal of fixed asset management.
2. Purpose of project implementation
Using RFID technology to realize mobile base station asset management, we can summarize the purpose as follows:
Demonstrate the technological innovation strength of China Mobile and improve the level of asset management;
The automatic collection of data solves the problem of long inventory time, many links, and the total number is not correct;
Realize 24-hour real-time monitoring of the base station carrier, timely control of problems, and improve the efficiency of equipment use;
Instant upload and update of data when the mobile base station carrier is mobilized;
Reduce operating costs and enhance the international competitiveness of enterprises.
Three system overview
(1) The basic composition of the entire RFID system is roughly composed of: electronic tags, RFID antennas and RFID readers:
Electronic tag: It is composed of a coupling element and a chip. The tag contains a built-in antenna for communication with the radio frequency antenna;
RFID antenna: mainly used to transmit and receive radio frequency signals;
RFID reader: used to read the information of electronic tags, here can be divided into fixed readers and handheld readers.
In addition, the RFID base station asset management also involves system management software and control computers.
Data transmission method: It can be connected to an external computer in the form of RS232, wifi, GPRS and TCP/IP to realize information transmission.
(2) RFID system operation process
The main operating form of the system is: the reader emits a certain frequency radio frequency signal through the antenna. When the working range of the signal covers the area of the tag, the radio frequency signal activates the circuit in the tag to generate an induced current. At this time, the tag gains energy and is activated. At this time, the tag sends its own information through the built-in antenna of the card. The radio frequency antenna receives the carrier signal of the electronic tag and transmits it to the reader through the antenna regulator. The signal received by the reader is demodulated and decoded and then transmitted to the background main system. Perform related processing.
(3) Advantages of RFID technology
Exchange information with the outside world through radio frequency signals, strong anti-interference;
The amount of data is large, and the identity information and operating status of the target other than the identification information can be transmitted as needed;
The information processing speed is fast, which can reach tens of microseconds in some occasions;
It has strong environmental adaptability, strong anti-interference ability, can be used in all weather, almost free from pollution and humidity, and can avoid mechanical wear;
The system has high reliability and convenient and quick operation.
Long recognition distance, the farthest distance between the data carrier and the reader can reach tens of meters;
It is non-contact, so no manual intervention is required to complete the identification work, and it can be automated;
Detailed introduction of four systems
Assign the label area to the equipment placement position of the computer room. For the situation where multiple equipment such as servers are put together, it is necessary to carry out label management for this centralized position, and the label records the specific information of this position (such as the number of cabinets), and Fix the RFID in this position, and the system records all the information of this tag at the same time.
For the issuance of RFID tags, each RFID electronic tag needs to be bound with the asset. Before the asset is put into the warehouse, the RFID tag is uniformly affixed at the management office, and the information is simultaneously entered into the system database.
Store in, after querying the location of the cabinet in the computer room where the system server is placed, the list of operations for storing in production. The job list must at least include information such as the cabinet number and server number. The operation and maintenance personnel transport the server to the designated computer room according to the requirements of the operation list, and the personnel on duty in the computer room confirm the warehousing operation through the warehousing work order generated by the RFID handset. After the operation and maintenance personnel put the server in the designated location according to the requirements of the warehousing operation sheet, scan the cabinet number and server number through the RFID handheld to confirm that the operation is correct and complete the warehousing operation list. The staff on duty in the computer room confirms the cabinet number, server number and server location through the RFID handset to complete the warehousing work order.
For asset inventory and information changes, the staff on duty in the computer room opens the system inventory interface and imports the inventory information to the RFID handset. The staff on duty first read the RFID tags of the cabinets for confirmation, and then read the tags of the servers in the cabinets in turn. If the tag data read in the cabinet is consistent with the inventory data imported to the handheld, the interface will be green, indicating that it is passed. If the inconsistent handset interface shows a red interface to indicate failure, you can choose to restart the inventory or end the inventory after checking. Finally, import the inventory data into the system.
For information change, use the handset to read the RFID tag and the new tag on the original device and the new tag on the software interface of the information change, as well as the tag on the corresponding cabinet, to complete the information replacement.
The data collection diagram of the system is as follows:
The process of outbound and outbound is roughly the same as that of inbound. First, the system distributes an electronic outbound order. The staff will find the asset at the designated location in the computer room with the handheld, and use the handheld to scan the outbound bar. The electronic label on the device and the location label of the corresponding location, confirm that the items out of the library are consistent with the system requirements, and then send someone to pick it out. When the device passes the door,RFIDThe reader can collect the relevant information of the device in time, which can effectively prevent other devices from being taken out and confirm the outgoing information of the device.
Five system hardware equipment selection
1. The choice of reader
The reader is the key equipment of the RFID system, and it is also the most complex device. The requirements for the use of the RFID reader can be summarized as follows:
The radio frequency power can be adjusted automatically, and the maximum allowable long-term output power should be greater than 30dBm.
There are a variety of interfaces, the purpose is to adapt to the needs of different use environments
The reliability of reading and writing tags has a margin of more than 40% to resist unknowable environmental interference.
It has data interfaces such as serial port and Ethernet port.
With automatic fault diagnosis and service level control functions, in order to ensure the basic reading function in some cases.
With remote control and software upgrade functions.
Possess a certain data storage capacity (optional).
It has the reliability requirements for long-term uninterrupted operation. Other specific performance index requirements are mainly determined according to relevant national standards, and functional requirements can be customized according to actual needs, mainly realized by software.
High performance reader SFR-44
2. Antenna selection
The antenna looks simple, but it is actually very important because it is the carrier of signal transmission and reception, and its performance directly affects the final effect. From the technical indicators, there are mainly gain, half power angle and voltage standing wave ratio, etc., but the flatness (or consistency) of the passband gain and the consistency of the interface impedance are very important, and these are often higher than the general requirements. Many.
Antenna SFA-12R
3. Selection of handheld
Handheld is a necessary equipment for work, used to realize data collection and processing. Here we recommend the high-performance handheld SFH-14A of Shangfang Technology:
High-performance handheld SFH-14A
Electronic tags, here are unified use of metal-resistant electronic tags, mainly due to the requirements of the managed items and the environment.
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