With the popularization of smart terminals and the rise of barcode recognition technology in recent years, the in-depth development of the integrated application of the two-digit scanner module and the 2D code recognition module has been promoted. In addition to being widely used in self-service equipment supporting embedding, these technologies are also deeply used in library self-service lending applications, with the help of secure QR code reading technology and mobile Internet and other technical means to achieve more efficient operation services and improve reader satisfaction , optimize the allocation of human resources, reduce costs, and make self-service borrowing and returning books more user-friendly.

It is understood that the general collections of books such as efficient libraries, community libraries and public libraries range from hundreds of thousands to millions, and problems such as book loan and return management, inventory, search, and disorderly book arrangement have been plagued for many years. The management and staff of the library. Every day, a large number of people enter the library to read and study, and the book manager needs to manage the borrowing and returning of people's books. The work is complicated and complicated, and the checking is time-consuming and laborious. Registration and quality management bring a lot of pressure.

In order to provide the public with more friendly book resource services, a library self-checkout equipment with an embedded QR code identification module has also become popular on the market. The self-service bookcases and self-service borrowing and returning equipment in the library are equipped with 2D scanner modules, 2D code identification modules, 2D code scanner modules, 2D code scanners, 2D code readers, and 2D code scanner heads. Barcode reading engine, barcode scanner head, barcode scanner module and other QR code recognition equipment, combined with rich secondary development functions, integrate QR code scanner, data transmission and application to realize the expansion of library borrowing and returning functions. The QR code module has the ability to quickly read and decode, not only can read 1D codes and QR codes on various books, but also can quickly read Alipay, Apple Pay payment codes (and QR code electronic readers) certificate, etc.) information.

After the self-service counter in the library is connected with the self-service book borrowing and returning system (all-in-one card payment, mobile payment system) and the library system by embedding the QR code module, the data information of the ID card or reader's card is input, and the borrowing or returning The barcode of the returned book is placed in the scanner area of the counter for scanner. After the scanner is successful, click to borrow or return it. If it is not returned within the time limit, you can use the card or mobile payment to pay.