What is RFID?
What does RFID mean?
RFID stands for Radio Frequency Identification. RFID technology is used in IoT systems and Industry 4.0. In our private lives, we encounter RFID in our bank cards, ID documents and car keys, among other things. RFID technology enables contactless data exchange.
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Functionality
The RFID tags transmit their data to the readers using different frequencies. A distinction must be made between different types of tags.
Passive tags function without an internal energy source. The energy required for data retrieval is transmitted by the frequency of the reader.
Active tags have their own energy source for data transmission.
Semi passive tags use an internal energy source to generate a signal, but draw their operating energy from the reader's energy field.
Transmission Frequencies
Depending on the intended use and required signal range, RFID tags with different radio frequencies are used. A distinction is made between LF (low frequency), HF (high frequency) and UHF (ultra high frequency).
Data Query
The RFID readers send a permanent signal. If an RFID tag is within range of the signal, it sends a signal to the reader. Both the tag and the reader use radio waves to transmit the signal.
The Advantages of RFID
The biggest advantage of RFID technology is the wireless transmission of data without visual contact. Furthermore, the use of RFID systems enables:
- Greater transparency through unique identification
- Cost savings through more efficient operating procedures
- Pulse detection brings advantages for incoming goods
- Radio signal penetrates a wide range of materials
- Resistance capability of the RFID tags
- Possibility of individual programming and data storage
- Storage of product-relevant information
- Higher scanning speed than barcode systems
- Less traceability of product flows