RFID (Radio Frequency Identification), or radio frequency identification technology, is an application technology that integrates automatic identification technology and radio frequency communication technology, and is a non-contact automatic identification technology. In recent years, RFID has attracted the attention of domestic and foreign libraries.
RFID is mainly composed of electronic tags (Tag), readers and related application systems (Application System). RFID is a network system that uses electromagnetic spectrum to transmit specific identification information in a non-contact, non-visual, and highly reliable manner. The application of RFID system in the field of library management has updated the traditional bar code technology and security mechanism, accelerated the process of library management automation, and also provided a hardware platform for the construction of digital libraries.
1. Management automation
RFID "Intelligent Collection System" includes a series of automated management systems such as the librarian service system, chip conversion system, self-checking system, self-returning system, collection checking system, and channel detection system. Each book is affixed with an RFID tag, and an RFID inspection machine is installed at the exit of the library. When someone leaves the library with RFID-tagged books or other media materials that have not been checked, the RFID checking machine will sound an alarm. If someone tries to avoid the alarm and take the book away, the library can still track the book and put it in place.
2. Advanced service model
( 1) After entering the library, readers can first retrieve the book status on the self-service equipment. Borrowing books is self-service. Readers put the selected books in front of the automatic lending machine and pay their own "all-in-one card". The machine will automatically scan and print out the loan slip. When returning a book, just put the book at the “book dropout” of the automatic book return box, and the system will automatically recognize the book and process it. In the link of borrowing and returning the book, there is very little time for staff to intervene.
( 2) The counter workstation can handle borrowing and returning books at the same time, and can also handle other more complicated tasks, such as renewal, fines and other operations.
(3) The self-service inquiry system outside the library is available 24 hours a day. It is very convenient to read electronic books and periodicals, and to find electronic materials.
( 4) The RFID detection door system is stable (not affected by the environment).
(5) When the collection is counted, the librarian only needs to move the collection check system across the bookshelf to read it. The count time is very short. It originally took several people and months of work, and one person can complete it in half a day. It is easy to find books that are not on the shelves or messy shelves, which greatly saves manpower and material resources, and allows employees to have more time to help readers or add more service items.
3. RFID electronic tags have more advantages than barcodes:
( 1) The data can be updated: the barcode cannot be changed after it is printed, and the RFID electronic tag can add, modify, and delete the data stored in the tag without limitation.
( 2) Convenient data reading: Bar code readers can be read only when the scanning light source shines on the bar code when the bar code reader is close and there is no obstruction. RFID tags can transmit signals as long as they are within the range of radio waves.
( 3) Large storage capacity: one-dimensional bar code is 50 bytes, the maximum capacity of two-dimensional bar code can store 2 to 3000 bytes; the maximum capacity of RFID tags can reach several megabytes.
(4) Reusable: The barcode ends with the end of the life of the product; RFID tags can be reused because their data can be updated.
( 5) The scanning speed is fast, and several data can be read at the same time: the barcode reader can only read a single barcode data at a time; the RFID tag recognizer can recognize 5 tags at the same time.
( 6) Good security: All RFID tags are protected by passwords, and high-security protection measures make them difficult to be forged.
( 7) Durability: Generally, barcodes made of traditional paper or plastic materials are sometimes damaged and difficult to recognize due to rain or humidity and damage during transportation. RFID has the characteristics of being repeatedly used hundreds of thousands or even millions of times, and its material can also be placed in a relatively harsh environment, so it is more durable than barcodes and naturally costs less.
( 8) Small size: Traditional magnetic barcodes are limited in size and are not easy to be embedded on smaller items. RFID is not the case. Its mini size can be hidden in various objects.