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Radio frequency identification technology

Radio frequency identification technology

 

RFID tags are radio frequency identification technology.

RFID (radio frequency identification) technology, also known as radio frequency identification, is a communication technology that can identify specific targets through radio signals and read and write relevant data, without identifying the system and a specific target between the establishment of mechanical or optical contact The Commonly used low frequency (125k ~ 134.2K), high frequency (13.56Mhz), ultra-high frequency, microwave and other technologies. RFID reader is also divided into mobile and fixed, the current RFID technology is widely used, such as: library, access control systems, food safety traceability and so on.

1Introduction

[1](English:Radio Frequency IDentification,abbreviation:RFID)is a wireless communication technology that can identify a specific target by radio and read and write relevant data without having to identify a mechanical or optical contact between a system and a specific target.
The radio signal is transmitted from the label attached to the item by adjusting the electromagnetic field into the radio frequency to automatically identify and track the item. Some tags in the identification of the electromagnetic field from the identifier can be obtained in the energy, do not need the battery; also have the tag itself has a power supply, and can take the initiative to send radio waves (tuned into radio frequency electromagnetic field). The tag contains information about the electronic storage, which can be identified within a few meters. Unlike barcodes, radio tags do not need to be within the sight of the recognizer, or they can be embedded within the tracked object.
Many industries have used radio frequency identification technology. The label attached to a car is being produced, the factory can track the progress of this car in the production line. Warehouse can track the whereabouts of the drug. Radio tags can also be attached to livestock and pets to facilitate the positive identification of livestock and pets (positive identification means to prevent the use of only the same number of livestock). Radio frequency identification of the identification card can enable employees to enter the locked part of the building, the car''s RF transponder can also be used to collect the charges and parking fees.
Some radio tags are attached to clothing, personal belongings, and even within the human body. As this technology may be without permission of the circumstances to read personal information, the technology will also have violations of personal privacy.


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