What Are Radio Frequency Identification Systems?

Radio frequency identification technology (RFID) is an emerging automatic identification technology developed in the 1980s. Radio frequency identification technology is the use of radio frequency signals through spatial coupling (alternating magnetic field or electromagnetic field) to achieve non-contact information transmission and transmission. Technology for identification purposes.

RFID system

Radio frequency identification technology

RFID system

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Originally in the technical field,

After the tag enters the magnetic field, it receives the

The basic working methods of RFID systems are divided into

Usually the frequency used by the reader when sending is called

RFID is a flexible application technology that is easy to manipulate, simple and practical, and especially suitable for automation control. The identification work does not require manual intervention. It can support both read-only work mode and read-write work mode without contact or aiming. Can work freely in a variety of harsh environments: short-range RF products are not afraid of harsh environments such as oil stains and dust pollution, and can replace bar codes, such as used to track objects on the assembly line of factories; long-range RF products are mostly used for transportation, and the identification distance can Dozens of meters, such as automatic toll collection or vehicle identification. The RFID system has the following system advantages:

Easy and fast reading: data can be read without a light source, and can even be carried out through the outer packaging. The effective identification distance is larger. When using the active tag with its own battery, the effective identification distance can reach more than 30 meters;

Fast recognition speed : Once the tag enters the magnetic field, the reader can read the information in it instantly, and it can process multiple tags at the same time to realize batch recognition;

Large data capacity : The two-dimensional barcode (PDF417) with the largest data capacity can only store a maximum of 2725 digits; if it contains letters, the storage capacity will be less; RFID tags can be expanded to dozens of K according to user needs;

Long service life and wide application range : its radio communication method can be used in high pollution environment such as dust, oil pollution and radioactive environment, and its closed packaging makes its life greatly exceed the printed barcode;

The tag data can be changed dynamically : the programmer can write data to it, which gives the RFID tag the function of an interactive portable data file, and the write time is less than the print barcode;

Better security : Not only can be embedded or attached to products of different shapes and types, but also password protection can be set for reading and writing of tag data, which has higher security;

Dynamic real-time communication : The tag communicates with the reader at a frequency of 50 to 100 times per second, so as long as the object attached to the RFID tag appears within the effective recognition range of the reader, its position can be dynamically tracked and monitored. .