RFID is an abbreviation for radio frequency identification technology. RFID can automatically identify items. Its function is very powerful. This recognition goes beyond traditional forms such as barcodes.
So what is an RFID tag? A common label is a self-adhesive label with a microchip. Each chip has a unique ID. Combined with the RFID management system, the ID of the chip can be defined as various specific information, such as its location, serial number, manufacturer, photo, usage history and maintenance schedule.
As an asset management technology, RFID is now widely used in industries ranging from construction to libraries. Its advantages in real-time tracking, logistics management, data capture, inventory and distribution are beneficial to almost all enterprises.
How RFID works is a big question! Let us take a closer look at the different types of RFID systems available and how they work. The two most widely used types of RFID are active and passive. Active RFID tags are self-powered, so that the tags have a greater communication distance and more storage capabilities. Passive RFID tags are powered by electromagnetic signals transmitted by the reader and are cheaper than active RFID. Passive RFID works by using the signal from the reader to charge the tag capacitor and provide the power required for communication.
The easiest way to distinguish RFID is based on its operating frequency, namely low frequency, high frequency and ultra high frequency. The role of RFID tags depends on these frequencies. Next, Shenzhen Aisen IoT Technology Co., Ltd. will briefly introduce the advantages and disadvantages of each frequency band RFID for you. Understanding these characteristics can help you choose the right RFID electronic tag.
Low-frequency RFID can penetrate most materials from water to human tissues and is very suitable for animal identification. The tag can also be easily applied to any non-metallic object recognition, and can provide a reading distance of about 10 cm. Low frequency means relatively low data transmission rate, so communication speed is slower, and it is affected by electrical noise in industrial environments.
In the presence of water and human tissues, high frequency RFID is not as effective as low frequency, but in an industrial environment, it is not affected by radio frequency interference. Make this type of RFID system more popular in ticketing and data transmission applications.
High frequency has a higher data transmission rate, and this increase in speed allows the reader to communicate with multiple tags at once. The high-frequency reader can read more than 50 tags per second, with a reading range of 10cm to 1m.
UHF is very suitable for supply chain markets that require longer read ranges. The reading distance of UHF RFID is up to 12m, which is faster than the transmission speed of low-frequency and high-frequency RFID data, and its performance is still very high even in harsh environments.
RFID is becoming a powerful tool in many industries. Before implementing RFID, it is recommended that you have a good understanding of the technology in order to find the most suitable RFID electronic label for your use.