Why is our express delivery always accurate on the route? Why are the books in the school library managed neatly and orderly? Why are some accidentally stolen items quickly tracked back? These have to use RFID technology.
There are two situations in which RFID technology works. One is to receive the RF signal from the reader when the RFID tag enters the effective recognition range of the reader. The energy obtained by the induced current is used to send the information stored in the chip. The RFID tag actively transmits a signal of a certain frequency, and the reader receives the information and decodes it, and sends it to the central information system for data processing.
There are three main categories of RFID technology products:
1. Passive RFID products:
Such products require close-contact identification, such as meal cards, bank cards, bus cards and ID cards. These card types require close contact during work identification. The main working frequencies are low frequency 125KHZ and high frequency 13.56MHZ. UHF 433MHZ and 915MHZ. These products are also common in our lives and are relatively early in development.
2. Active RFID products:
This type of product has the characteristics of automatic identification over long distances, so it is applied to some large-scale environments, such as smart parking lots, smart cities, smart transportation and Internet of Things. Their main work is microwave 2.45GHZ and 5.8GHZ. , UHF 433MHZ.
3. Semi-active RFID products:
As the name suggests, it is the combination of active RFID products and passive RFID products. It combines the advantages of both, and enables the microwave
2.45G to take advantage of the low frequency 125KHZ frequency to solve the problem that active RFID products and passive RFID products cannot solve. Problems such as access control, area location management, and security alarms, proximity positioning, and long-distance transmission of data.
RFID technology application
1. Warehouse / Transportation / Materials:
The RFID chip is embedded in the goods, stored in warehouses, shopping malls and other goods as well as in the logistics process. The goods related information is automatically collected by the reader, and the management personnel can quickly inquire the goods information in the system, reduce the risk of being discarded or stolen, and improve the goods. Hand over speed, improve accuracy, and prevent stocking and anti-counterfeiting.
2. Access control / attendance:
Some companies or some large conferences can identify the sign-on through the door identification system by entering the identity or fingerprint information in advance, which saves a lot of time, convenient and labor-saving.
3. Fixed asset management:
Some places, such as libraries, art galleries, and museums, where assets are large or expensive, require complete management procedures or rigorous protection measures. When the information stored in books or valuables changes abnormally, it will be in the system for the first time. Remind the administrator to handle the situation.
4. Train / car identification / baggage security:
The railway dispatching system of China's railway is a typical case, which automatically identifies the vehicle number and information input, saves a lot of manual statistics, and improves the accuracy.
5. Medical information tracking:
Case tracking, waste tracking, and drug tracking are all good ways to improve hospital service levels and efficiency.
6. Military/Defense/National Security:
The dynamics of some important military drugs, guns, ammunition or military vehicles require real-time tracking.
Seven advantages
1. Strong anti-interference
Non-contact identification, able to work in a harsh environment, with strong penetrating power, can quickly identify and read labels.
2. The data capacity is very large
It can be expanded to 10k according to the user's needs, much higher than the 2,725-digit capacity of the two-dimensional bar.
3. Can be operated dynamically
Its tag data can be dynamically modified by programming and can be dynamically tracked and monitored as long as the object to which the RFID tag is attached appears within the effective recognition range of the reader.
4. Long service life
Because of its strong anti-interference, RFID tags are not easily damaged and have a long service life.
5. Anti-collision
It can read multiple RFID tags simultaneously within the effective recognition range of the reader.
6. High security
The RFID tag can be attached to the product in any form, and the tag data can be password encrypted to improve security.
7. Recognition speed is fast
As soon as the RFID tag enters the valid recognition range of the reader, the data is immediately read, and in general, the identification can be completed in less than 100 milliseconds.