The difference between library RFID UHF and high frequency tags
With the continuous progress of the RFID Internet of Things, rfid tags are more and more widely used in libraries. Among them, there are two different frequency band tags, UHF and HF electronic tags. What is the obvious contrast between the application of high frequency tags and high frequency tags in libraries?
Ultra high frequency (UHF) compared with high frequency (HF):
1. Low implementation cost
The overall equipment cost of the UHF RFID system is low, and the cost performance is high. As small as an electronic tag-the electronic tag contains an antenna for receiving and transmitting signals, and the physical size of the antenna is proportional to the wavelength of the electromagnetic wave. The higher the frequency and the shorter the wavelength, the smaller the physical size of the antenna. The more complicated the process; so the high-frequency electronic tags have to be produced so large, which is determined by its physical characteristics, so the cost is higher); as large as mobile libraries, the current cost of UHF mobile libraries is generally 350,000 About, and the high-frequency mobile library is about 450,000.
2. The electronic label has small volume, good concealment and long service life.
As mentioned earlier, UHF electronic tags are small and high-frequency tags are bulky, which is determined by the physical characteristics of their technology. Due to its small size, UHF electronic tags have low cost, good concealment, and correspondingly longer service life, and there are currently UHF electronic tag production lines in China, with an annual production capacity of 150 million, which can be well guaranteed Supply. High-frequency tags are bulky and can only be attached to the title page or bottom page of the book. They are easily bent, torn, or damaged during reading. The service life is generally 2-3 years.
3. UHF tags can be quickly read
The high-frequency reader is slow to read, and reading 10 different HF RFID tags at the same time is already difficult. UHF Reader can read up to 60 electronic tags at the same time per second, and the response is rapid. For libraries, the work efficiency will be greatly improved, especially the inventory and book search work, and book borrowing and repayment. The pleasure brought to our work and life.
4. The reading and writing distance of UHF tags is adjustable
The reading distance of HF RFID electronic tags is close, and the limit distance is 1.0m, while the reading distance of UHF RFID electronic tags can be near or far. Not only can it be applied to the identification of book items at short distances, but also suitable for long-distance luggage level Automatic identification, the identification distance is flexible and adjustable; it can be easily read from a few meters away, and the active UHF RFID electronic tag can even reach 200M. This means that HF RFID tags can only play a role in the 1.0m space, and the ability to expand new functions is weak. UHF RFID electronic tags, on the basis of the completion of basic functions, can be launched endlessly in the vast application space. The endless list of wonderful functions, such as: book positioning, access statistics, blind navigation, etc., provides a richer library extensions.
5. The distance of UHF access control is adjustable, which can be recognized in all directions
The distance between high-frequency access control is limited, and because of the slow reading speed, it is easy to produce missed readings; and it has obvious directionality in the anti-theft identification, the blind area is large, and it is impossible to achieve all-round identification. The UHF access control distance is adjustable, the longest distance can reach 2m, and the electronic tag can be recognized at any angle within the access control reading range. The anti-theft effect is twice that of high frequency.
6. Mobile library problem
The books in the high-frequency mobile library cannot be all visible, and the power is large (more than 1000W), and the readers cannot automatically put the shelves when returning the books. The service is not only cumbersome but also costly. The books in the UHF mobile library are all visible, and the working power is generally 700-800W. Readers can return the books automatically.
7. UHF technology
The UHF technology platform is high, and it can provide new products and services to the library continuously. UHF adopts the global Internet of Things standard ISO 18000-6C, and it is possible for libraries to use electronic tags free of charge in the future.
The above is the comparison of library RFID UHF and HF tag applications. I hope that the comparison of the advantages and disadvantages of the two applications can help you better understand and use library RFID UHF and HF tags. High frequency, high frequency label application comparison is shared here!