What is an RFID tag

RFID wireless radio frequency identification is a non-contact automatic identification technology. It automatically identifies target objects and obtains relevant data through radio frequency signals. The identification work can work in various harsh environments without manual intervention. RFID technology can identify high-speed moving objects and can identify multiple electronic tags at the same time, and the operation is quick and easy.

What is an RFID tag

Tag: Composed of a coupling element and a chip. Each RFID tag has a unique electronic code and is attached to an object to identify a target object, commonly known as an electronic tag or a smart tag.

RFID electronic tags: Active tags, passive tags, semi-active semi-passive tags.

The working principle of RFID: After the tag enters the magnetic field, it receives the RF signal from the reader, sends the product information stored in the chip (passive tag, passive tag or passive tag) by the energy obtained by the induced current, or sends an active signal. A frequency signal (active tag, active tag or active tag); the reader reads the information and decodes it, and sends it to the central information system for data processing.

Application of RFID tag technology Short-range radio frequency identification products are not afraid of the harsh environment such as oil stains and dust pollution. They can replace bar codes in such environments, such as tracking objects on the factory's production line.

Long-range radio frequency identification products are mostly used for traffic, and the recognition distance can reach several tens of meters, such as automatic charging or identification of vehicle identities.

1. In the retail industry, the use of bar code technology has led to the orderly management of tens of thousands of types of products, prices, production areas, batches, shelves, inventory, sales and other links.

2. Using automatic vehicle identification technology, roads, bridges, car parks and other toll collection sites avoid the phenomenon of queued customs clearance of vehicles and reduce waste of time, thereby greatly improving the efficiency of transportation and the capacity of transportation facilities.

3. In the automated production line, all aspects of the entire product production process are placed under strict monitoring and management.

4. The use of long-range radio frequency identification technology improves the inconvenience of truck drivers having to get out of the car in harsh environments such as dust, pollution, cold and heat.

5. In the operation and management of buses, the automatic identification system accurately records the arrival and departure times of vehicles at each station along the route, providing real-time and reliable information for vehicle scheduling and overall operation management.

The technology of RFID tags is very widely used. According to estimates from market analysts at Chuangxin Technology, the current typical applications include animal chip, access control, air parcel identification, document tracking management, parcel tracking and identification, animal husbandry, logistics management, mobile commerce, and products. Anti-counterfeiting, sports timing, ticket management, car wafer anti-theft devices, parking lot control, production line automation, material management, etc.

Researching RFID's open source projects:

Open source software radio has a strong influence on the industry of radio, and RFID is no exception. GNU Radio is a free software development tool suite. It provides signal processing and processing modules that enable software-defined radios on easy-to-make, low-cost radio frequency (RF) hardware and general-purpose microprocessors. This kit is widely used by amateurs, academic institutions and commercial organizations to research and build wireless communication systems. The application of GNU Radio is mainly written in the Python programming language. But its core signal processing module is C++ built on a microprocessor with floating-point arithmetic. Therefore, developers can build a real-time, high-capacity wireless communication system quickly and easily. Although its primary function is not emulators, GNU Radio supports the study of algorithms for signal processing of pre-stored and (signal generator)-generated data without the RF radio hardware components.