Application of X-RFID technology in library management

introduction

The daily services of the Library involve the management of people flow and logistics, which require a large amount of reader and book identification, Access Control, statistics and other work.

At present, libraries basically use barcode technology as an identification method to achieve these functions. However, although barcodes have the advantages of being cheap and easy to produce, they also have some inherent shortcomings that are difficult to overcome. For example, they are easy to wear and must be affixed to books, which brings inconvenience to use. They are not completely suitable for libraries. The new X-RFID technology that combines XPM and RFID can effectively overcome the shortcomings of barcodes. It has large capacity, high stability and long-life storage performance, and can realize many new functions that cannot be achieved by barcodes. The development and utilization of these new functions will give The traditional service work of libraries has brought about revolutionary changes.

1. Concept and characteristics of X-RFID

That is, Radio Frequency Identification (RFID) has the advantages of non-contact, long working distance, suitable for harsh environments, and can identify moving targets. It automatically identifies target objects and obtains relevant data through radio frequency signals. The identification does not require manual intervention and can work in various harsh environments.

Super Permanent Memory (XPM) is a new type of non-volatile memory (Non-Volatile Memory, NVM) technology. It uses 100% deep sub-micron standard CMOS process, which is the same as manufacturing logic circuits (CPU, DSP, etc.) without the need for additional floating gate processes. Practice has shown that XPM products have high reliability and are not easily affected by factors such as temperature, voltage, irradiation, and the number of read operations.

X-RFID uses XPM technology in RFID chips, using XPM memory to replace the traditional EEPROM as the ID code storage device, so that the advantages of XPM memory are concentratedly reflected. It can be widely used in logistics, retail, manufacturing, public transportation, medical and health, airports, railways, Asset MANAGEMENT, identity recognition, security, property rights protection and military fields. It has low cost, high process compatibility and confidentiality. High, physically inerasable and other characteristics.

2. Composition and working principle of X-RFID system

The X-RFID application system consists of four parts: tag, antenna, reader and writer, and data management system.

X-RFID tag is the core of the radio frequency identification system, also known as radio frequency tag. Its English name is TA G, and it is also called LABEL. Electronic tags are the real data carrier of radio frequency identification systems. Generally, radio frequency tags are composed of coupling components and chips. Each tag has a unique electronic code and is attached to an object to identify the target object; when illuminated by radio frequency signals, it can reflect back radio frequencies carrying numerical and alphabetical coded information. Signal for reader processing and identification. According to the different power supply methods of radio frequency tags, they can be divided into active tags and passive tags. Active tags are equipped with batteries, and passive tags have no batteries inside.

A reader is an electronic device that reads or reads/writes electronic tags. It is sometimes also called a reader (Reading Device), interrogator (Interrogator), communicator or reading device. It can be designed as handheld or fixed.

The reader/writer is a device that generates, transmits, and receives signals. The radio frequency signal it generates is amplified by a power amplifier and emitted through the antenna. At the same time, it receives the signal reflected back by the tag, separates the transmission and reception through the radio frequency receiver, and then detects and Demodulated, amplified by a preamplifier, and sent to the readout computer for processing. When the tag enters the magnetic field, the reader sends a set of fixed-frequency electromagnetic waves to the tag through the antenna. There is an LC series resonant circuit in the tag, whose frequency is the same as the frequency emitted by the reader. Under the excitation of the electromagnetic waves, the LC resonant circuit Resonance is generated, so that there is charge in the capacitor. At the other end of the capacitor, there is a unidirectional electron pump, which sends the charge in the capacitor to another capacitor for storage. When the accumulated charge reaches 2 V, This capacitor can be used as a power supply to provide working voltage for other circuits, transmit the data in the card or receive the data from the reader, and reStore the object information in the tag, thereby achieving the purpose of identifying the object. The antenna of the reader can be built-in or external.

The working frequency band of X-RFID. For radio frequency identification systems, the most important frequencies are 0 ~ 135 kHz, and the ISM frequencies are 6. 78 MHz, 13. 56 MHz, 27. 125 MHz, 40. 68 MHz, 433. 92 MHz, 869. 0 MHz, 915. 0 MHz (not used in Europe), 2. 45 GHz, 5. 8 GHz and 24. 125 GHz.

3. Application of X-RFID in libraries

Using RFID technology to automate library business requires RFID tags to have extremely high requirements on data storage period, cost affordability, data security, etc. According to the most common RFID based on EEPROM technology, Tags have shortcomings such as short data storage time, low security, high cost, and easy data loss. Therefore, among various RFID technologies, XPM technology is the most suitable for use in RFID library Management systems. This not only effectively solves the data storage period and security, but also relatively reduces the operation and implementation costs of the RFID library management system. It also provides sufficient conditions for the widespread application of RFID in the library industry.

X-RFID technology is mainly used in libraries for self-service borrowing stations, self-service book return boxes, counter workstations, collection sorting systems, machine inspection service stations, electronic safety doors, bookshelf management systems, etc. Intelligent library management system based on X-RFID, as shown in Figure 3.

X-RFID tags can provide convenient data management and have anti-theft protection functions; the antenna mainly provides security work at the entrance and exit, and it can accurately identify the title of each book that triggers the alarm, truly achieving false alarm; counter The workstation is used by administrators to read the RFID codes of books when borrowing and returning books. It is convenient for library administrators to carry handheld code readers at any time to capture the information of smart tags on books, quickly search for books, and eliminate clutter on the bookshelves. Book management and classification; the self-service book borrowing and returning machine allows readers to handle the borrowing procedures by themselves. It consists of a library card reader and writer, an RFID Reader and writer, a touch screen and a receipt printer; an automatic sorting system, using The reader identifies the tags to achieve the purpose of automatic sorting; the application software uses the SIP2 interface to connect to LAS and other components through the Ethernet interface, connecting the intelligent library management system with the library's circulation automation system, giving Convenient for readers and librarians.

4 Advantages of using X-RFID system

4.1 Simplify the process and improve efficiency

The current process of borrowing and returning books generally uses barcode scanning systems. The collection of barcode data is completed through fixed or handheld barcode scanners. Barcodes are easily damaged and are only suitable for close-range, static, and small data collection. In addition, the scanning operation requires manual labor. You have to open the book and find the barcode location before scanning. The operation process is cumbersome and the efficiency of borrowing and returning books is low. The introduction of X-RFID technology can realize a dynamic, fast, large-volume, and intelligent book borrowing and returning process, improving the security of information storage, the reliability of information reading and writing, and the speed and speed of borrowing and returning books.

4.2 System improvements to improve security

Use X-RFID technology to improve the existing management system, link the anti-theft system with the book circulation management system, and record the entry and exit history of each book, so that it can be matched with the history of borrowing and returning books.

It can effectively improve the accuracy of the anti-theft system and ensure the safety of books.

4.3 Reduce workload and improve job satisfaction

Due to years of repetitive work, library staff have a heavy workload. For example, relying on manual warehouse-smart-inventory-rfid-bookshelf.html target='_blank'>book inventory requires a heavy workload, and it is easy to have certain negative thoughts about the work; in addition, readers are also dissatisfied with the library, resulting in a lack of books. Library job satisfaction has declined. Through the transformation of X-RFID technology, staff can be liberated from the library's daily heavy and repetitive work, and at the same time, readers' satisfaction with library work can be improved.

4.4 Electronic tags have strong data retention and long code life.

Due to the physically non-rewritable method, compared to using high-voltage electric boxes to store data, RFID data using EEPROM technology can be stored for up to 10 years, while the data retention of X-RFID can reach more than 100 years. Due to the non-contact reading method and the characteristics of waterproof, antimagnetic and high temperature resistance, the life of RFID electronic tags is much longer than that of barcodes. Each electronic tag can be read at least 100,000 times. In this way, once the electronic label is attached, it can be used for a long time.

  5 Conclusion

Due to the current development status of my country's libraries, the promotion and application of X-RFID in the field of Chinese libraries is restricted by various factors, and its implementation will take a long time to achieve. However, X-RFID can allow libraries to achieve truly intelligent management. X-RFID technology can provide readers with simple and fast self-service services, improve the work efficiency of librarians, save manpower for libraries, and provide security for readers. environment of. The unique advantages of X??RFID are unmatched by other identification technologies. The X-RFID system is the development trend of library management systems. It will eventually replace and eliminate the currently widely used barcode identification technology. The application of X-RFID technology It will promote the construction and development of digital libraries in my country.