RFID radio frequency identification is a non-contact automatic identification technology. It automatically identifies the target object and obtains related data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and identify multiple tags at the same time, which is fast and convenient to operate.
According to different power supply methods, RFID tags can be divided into active tags and passive tags (also known as active tags and passive tags). Active tags mean that the tag has a power supply inside it; passive tags mean that the tag does not need a power supply and relies on the energy of the reader to send electromagnetic waves to work. In general, the range of commercial passive tags is less than 6 meters.
The origin of RFID technology
In 1899, Nikola Tesla came up with the idea of ​​using wireless to transfer electricity, which is the basic idea of ​​RFID.
In 1945, Léon Theremin invented a spy tool, which mainly uses the reflection of sound to transmit important information. This technology is considered the originator of RFID.
In 1948, the article "Communicating with Reflected Power" published by Harrystockman laid the theoretical foundation of RFID.
Mario Cardullo invented the prototype of modern RFID in 1973. MarioCardullo is regarded as the inventor of RFID and the inventor of the mobile communication satellite concept.
RFID has directly inherited the concept of radar, and has been further developed on this basis. A complete RFID system is composed of three parts: a reader, a tag, a so-called transponder, and an application software system. The reader emits electromagnetic waves of a specific frequency to drive the tag circuit to send out internal data (such as product information). The reader sequentially receives the interpretation data and sends it to the application for corresponding processing.
Key technologies of RFID
RFID mainly includes two aspects of key technologies for industrialization and key technologies for application.
1.Key technologies of RFID industrialization
The key technologies of RFID industrialization mainly include: tag chip design and manufacturing: such as low-cost, low-power RFID chip design and manufacturing technology, new storage technology suitable for tag chip implementation, anti-collision algorithms and circuit implementation technology, chip security technology , And the integration technology of tag chip and sensor.
Antenna design and manufacturing: such as tag antenna matching technology, RFID tag antenna structure optimization technology for different application objects, multi-tag antenna optimization distribution technology, on-chip antenna technology, reader beam scanning antenna array technology, and RFID tag antenna design simulation Software, etc.
RFID tag packaging technology and equipment: such as packaging technology based on low temperature hot pressing, optimization of precision mechanism design, multi-physical quantity detection and control, high-speed and high-precision motion control, equipment fault self-diagnosis and repair, and online detection technology.
RFID tag integration: for example, the matching technology between the chip and the antenna and the attached special material medium, and the consistency technology in the tag processing process.
Reader design: such as dense reader technology, anti-jamming technology, low-cost miniaturized reader integration technology, and reader security certification technology.
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2.Key technologies of RFID application
The key technologies of RFID application mainly include: RFID application architecture, RFID system integration and data management, RFID public service system, RFID detection technology and specifications.
RFID application architecture: For example, various software and hardware and data interface technologies and service technologies in RFID application systems.
RFID system integration and data management: such as RFID and wireless communication, sensor network, information security, industrial control and other integrated technologies, RFID application system middleware technology, organization, storage, management, exchange, distribution, data of massive RFID information resources Processing and cross-platform computing technologies.
RFID public service system: Provide authentication and registration, code management, multi-code system mapping, code analysis, retrieval and tracking technologies and services that support the basic service system of RFID social applications.
RFID detection technologies and specifications: For example, RFID tags and related products for different industries are used to detect physical characteristics and performance consistency of detection technologies and specifications, tags and readers for air interface consistency detection technologies and specifications, and comprehensive system solutions Detection technology and specifications.
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