RFID Basics
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RFID Basics
2020-08-04 15:55:48

1. What is RFID

RFID is the abbreviation of radio frequency identification, namely radio frequency identification. It is often called inductive electronic chip or proximity card, inductive card, contactless card, electronic label, electronic bar code, etc.


A complete RFID system is composed of reader and transponder. Its action principle is that the reader transmits a certain frequency of infinite wave energy to the transponder, which is used to drive the transponder circuit to send out the internal ID code. At this time, the reader receives the ID code. The particularity of the transponder is that it is battery free, contact free and card free, so it is not afraid of dirt. Moreover, the chip code is the only one in the world that cannot be copied, with high security and long service life.


RFID is widely used. At present, typical applications include animal chip, car chip anti-theft device, access control, parking control, production line automation, material management. There are two kinds of RFID Tags: active tags and passive tags.


The following is the internal structure of the tag: chip + antenna and RFID system composition diagram


2. What is electronic tag

Electronic tag is RFID, some call radio frequency tag, radio frequency identification. It is a non-contact automatic identification technology, through radio frequency signal identification target object and obtain relevant data, identification work without manual intervention, as the wireless version of barcode, RFID technology has waterproof, antimagnetic, high temperature resistance, long service life, long reading distance, data encryption on the label, larger storage capacity and information storage Easy to change.


3. What is RFID technology?


RFID (radio frequency identification) is a non-contact automatic identification technology. It can automatically identify the target object and obtain relevant data through radio frequency signal. The identification work can work in various harsh environments without manual intervention. RFID technology can identify high-speed moving objects and multiple tags at the same time.


Short range RF products are not afraid of oil and dust pollution, and can replace bar codes in such environments, such as tracking objects on the assembly line of factories. Long distance RF products are mostly used in traffic, and the identification distance can reach tens of meters, such as automatic toll collection or vehicle identification.


4. Basic components of RFID system?

The most basic RFID system consists of three parts:

Tag: composed of coupling elements and chips, each tag has a unique electronic code, which is attached to the object to identify the target object; Reader: the device for reading (sometimes writing) tag information, which can be designed as handheld or fixed type;

Antenna: transmit RF signal between tag and reader.


5. What makes retailers advocate RFID so much?

Retail analysts at Sanford C. Bernstein estimate that Wal Mart can save $8.35 billion a year by using RFID, most of which is due to labor costs saved by not having to manually check the barcode of incoming goods. Although other analysts think the figure of $8 billion is too optimistic, there is no doubt that RFID can help solve two of the biggest problems in the retail industry: goods out of stock and loss (products lost due to theft and disruption of the supply chain). Now, in terms of theft alone, Wal Mart's annual loss is almost $2 billion, if the turnover of a legitimate enterprise can reach This figure can rank 694 in the list of 1000 largest enterprises in the United States. Research institutions estimate that this RFID technology can help reduce theft and inventory levels by 25%.


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