What is RFID? Brief About Its Principles and Applications
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What is RFID? Brief About Its Principles and Applications

Radio Frequency Identification (RFID) is a technology used to identify items in unique manner by way of radio waves, and is capable of capturing hundreds of objects at the same time. Although the term of RFID is not often heard, we use it in our daily lives more than we imagine, and its use continues to increase.
Published: May 03, 2022
What is RFID? Brief About Its Principles and Applications
Although the term of RFID (Radio Frequency Identification) is not often heard, it is actually very widely used in daily life. RFID is mainly used in identity recognition. It only needs a "beep" to complete the message transmission, which saves a lot of manpower and reduces a lot of time. RFID is also one of the foundations of NFC. This post introduces the principles and applications of RFID, as well as the difference from traditional barcodes and NFC, so that more people can know the relevant knowledge of RFID.

RFID (Radio Frequency Identification)

RFID (Radio Frequency Identification) is a technology that uses radio waves to passively identify a tagged object. It is used in several commercial and industrial applications, from tracking items along a supply chain to keeping track of items checked out of a library. It is based on the disadvantages of the contact system. It can be traced back to its first application of identifying airplanes as friend or foe in World War II, so as to avoid accidental injury to one's own side. RFID takes "identification" as its main function. Later, Wal-Mart, an American retailer, took the lead in introducing an RFID system to manage the entry and exit of goods. This move made RFID a new favorite in major shopping malls.

The advantages of RFID include long-distance reading and writing, one-to-many reading, reusability, high stain resistance, penetration and so on. Compared with traditional barcodes, the reading range of RFID is much wider. It does not need to scan barcodes one by one, and even if it is covered by leather or in harsh environments, RFID can still be read. Not easy to damage.

The information in the barcode cannot be changed after printing, but the RFID electronic label can be updated continuously. The application range of RFID is more and wider than that of barcode, and the processing speed is also very fast, so it has become one of the trends.

So, What is the Principle of RFID?

RFID is a "wireless communication technology", its signals are transmitted wirelessly, and information can be transmitted without contact. A complete RFID system consists of three parts, namely electronic tags, readers (card readers), and application databases (back-end computers). Through wireless communication technology, the electronic tag transmits the data to the reader, and the reader transmits the data to the database, so that the computer can perform the next step. Therefore, the function of electronic tags and readers is to "identify", that is, to find the corresponding electronic tag ID, and let the computer call out the corresponding information.

RFID Daily Life Applications

RFID is also commonly used in access control systems, car alarms, document management, production line automation, parking lot control, inventory management, personnel tracking, ID badging, supply chain management, counterfeit prevention (e.g. in the pharmaceutical industry), and more.

Because RFID does not require actual contact, it can also perform high-speed mobile reading. RFID electronic tags are often used in logistics management. It can be attached to items on the production line to grasp the location of items, track production time, location, color, arrival point, etc.

As for the library, in addition to the one-to-many sensing that can directly confirm the books borrowed and returned by readers, the book inventory can also be quickly read, simplifying work time. And because RFID has penetrability and stain resistance, it will not be unable to receive the transmission signal because of paper and ink, and can place the label on the page, reducing the probability of damage. Of course, anti-theft and access control systems are also one of the important applications of RFID.

RFID is the basis of NFC technology, but RFID cannot make information exchange
NFC (Near-field communication), also referred to as short-range communication and near-field communication, is a set of communication protocols that enable two electronic devices to communicate within a short distance. With the rise of smart phones and electronic wallets, the discussion of RFID is gradually less than that of NFC. However, in fact, NFC can be said to have evolved from RFID.

RFID is the basis of NFC, they all belong to a wireless communication method, but the biggest difference is that RFID cannot allow two electronic devices to communicate with each other, but NFC can. It can be said that the electronic label end of RFID can only allow the card reader to identify the ID, and the data is modified by the back end, while NFC can be said to integrate the electronic label and the card reader into one, which can make the two electronic devices can read each other and exchange data without pairing.

RFID still has shortcomings in privacy and security that need to be overcome
RFID makes life more convenient, but there are also concerns about privacy and data security. If RFID has no other security protection measures besides clearing data, then anyone with a reader can read it. Information about the tag holder. For example, RFID has the characteristics of long-distance reading and writing. If the RFID has not expired after the consumer leaves the mall, a person with a heart can read the consumer's shopping habits from a long distance through the reader. The same situation can also be applied in the parking lot. If the parking permit uses RFID, then the owner's whereabouts can be grasped by RFID reading.

In the modern age where technology is changing with each passing day, although RFID is not as widespread as traditional barcodes in terms of logistics due to its high cost, it has already been part of our daily life such as transportation and consumption. RFID brings a lot of convenience to life, but at the same time, it also needs more proper details and specifications. Believe there will be more development possibilities in the future, which is worth looking forward to.

Published: May 03, 2022 Source :cool3c

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