In the current era of big data, electronic devices such as readers and writers are very much needed as intermediaries for benign data transmission, because a lot of data detection, query, reading and erasure need to be completed by relying on them. Their use in daily life can facilitate people to manage data.
RFID reader Also known as radio frequency identification device. Through wireless communication with the RFID electronic tag through the antenna, the tag identification code and Memory data can be read or written. A typical reader contains a high-frequency module (transmitter and receiver), a control unit and a reader antenna.
There are two main operating modes for readers and writers: one is RTF (Reader Talks First, the reader speaks first), and the other is TTF (Tag Talks First, the electronic tag speaks first), which is the anti-collision protocol method of the reader.
Under normal conditions, electronic tags are in a "waiting" or "sleeping" working state. When the electronic tag enters the scope of the reader and writer, it detects a radio frequency signal with certain characteristics, and then switches from the "sleep" state to the "receiving" state, receives the command issued by the reader, performs corresponding processing, and returns the result to the reader. This type of electronic tag that only sends data after receiving special commands from the reader is called the RTF (Reader Talks First) method; on the contrary, the electronic tag that enters the energy field of the reader and actively sends its own serial number is called the TTF (Tag Talks First) method. Compared with TTF and RTF protocols, TTF electronic tags have the characteristics of fast recognition and are suitable for occasions requiring high-speed applications; in addition, it is more robust in noisy environments and more practical in situations where the number of electronic tags dynamically changes. Therefore, it is more suitable for tracking and tracing applications in industrial environments.
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