RFID has become a hot spot in the market in the past two years. With the advancement of micro integrated circuits, micro intelligent RFID tags have been greatly developed. Breakthroughs in low-power IC technology have created conditions for the development of small, low-power active tags. Passive tags do not require batteries and obtain the energy required for work from the magnetic field generated by the reader, but the reading distance is short and the communication is one-way, which has great limitations. RFID active electronic tags not only have all the characteristics of passive electronic tags, but also have the advantages of longer reading distance, two-way communication, longer life, and more reliable performance.
What is RFID?
RFID is the abbreviation of Radio Frequency Identification, which is wireless radio frequency identification. It is often called inductive electronic chip or proximity card, induction card, contactless card, electronic tag, electronic barcode, etc.
RFID system group Tag: composed of coupling elements and chips, each RFID tag has a unique electronic code, attached to an object to identify the target object, commonly known as an electronic tag or smart tag; Reader/reader-writer: a device that reads (and sometimes writes) tag information, which can be designed as a handheld or fixed type; Antenna: transmits radio frequency signals between RFID tags and readers.
A complete system also requires: data transmission and processing systems.
RFID electronic tags: active tags, passive tags, semi-active and semi-passive tags.
RFID working principle: After the tag enters the magnetic field, it receives the radio frequency signal sent by the reader, and sends out the product information stored in the chip (PassiveTag, passive tag or passive tag) with the energy obtained by the induced current, or actively sends a signal of a certain frequency (ActiveTag, active tag or active tag); after the reader reads and decodes the information, it sends it to the central information system for relevant data processing.
RFID technology: RFID wireless radio frequency identification is a non-contact automatic identification technology that automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require human intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and can identify multiple electronic tags at the same time, and the operation is quick and convenient.
Application of RFID technology:
Short-range radio frequency identification products are not afraid of harsh environments such as oil stains and dust pollution. They can replace barcodes in such environments, such as tracking objects on factory assembly lines.
Long-range radio frequency identification products are mostly used in transportation, and the identification distance can reach tens of meters, such as automatic toll collection or vehicle identity recognition.
- In the retail industry, the use of barcode technology enables tens of thousands of commodity types, prices, origins, batches, shelves, inventory, sales and other links to be managed in an orderly manner;
- The use of vehicle automatic identification technology avoids the phenomenon of vehicles queuing for customs clearance at toll places such as bridges and parking lots, reduces time waste, and thus greatly improves transportation efficiency and the capacity of transportation facilities;
- On the automated production line, all links of the entire product production process are placed under strict monitoring and management;
- In harsh environments such as dust, pollution, cold and heat, the use of long-distance radio frequency identification technology improves the inconvenience of truck drivers having to get off the bus to handle formalities;
- In the operation management of buses, the automatic identification system accurately records the arrival and departure times of vehicles at various stations along the line, providing real-time and reliable information for vehicle scheduling and full-process operation management.
RFID electronic tags have a wide range of technical applications. Typical applications include animal chips, access control, air parcel identification, document tracking management, parcel tracking identification, animal husbandry, logistics management, mobile commerce, product anti-counterfeiting, sports timing, ticket management, car chip anti-theft devices, parking lot control, production line automation, material management, etc.
Seven characteristics of electronic tags RFID
Compared with traditional barcode recognition technology, RFID has the following advantages:
1. Fast scanning
Only one barcode can be scanned at a time; RFID identifiers can read several RFID tags at the same time.
2. Small size and diverse shapes
RFID is not limited by size and shape in reading, and does not need to match the fixed size and printing quality of paper for reading accuracy. In addition, RFID tags can be developed in miniaturization and diverse forms to be applied to different products.
3. Anti-pollution ability and durability
The carrier of traditional barcodes is paper, so it is easy to be contaminated, but RFID has strong resistance to substances such as water, oil and chemicals. In addition, since the barcode is attached to a plastic bag or outer packaging carton, it is particularly vulnerable to damage; RFID tags store data in a chip, so they are protected from contamination.
4. Reusable
After the current barcode is printed, it cannot be changed. RFID tags can repeatedly add, modify, and delete the data stored in the RFID tag, making it easier to update information.
5. Penetration and barrier-free reading
When covered, RFID can penetrate non-metallic or non-transparent materials such as paper, wood, and plastic, and can communicate through penetration. Barcode scanners can only read barcodes at close range and without obstructions.
6. Large data memory capacity
The capacity of a one-dimensional barcode is 50Bytes, the maximum capacity of a two-dimensional barcode can store 2 to 3,000 characters, and the maximum capacity of an RFID is several MegaBytes. With the development of memory carriers, data capacity is also expanding. In the future, the amount of information that items need to carry will increase, and the demand for the capacity that labels can expand will also increase accordingly.
7. Security
Since RFID carries electronic information, its data content can be protected by passwords, making it difficult to forge or alter its content.
In recent years, RFID has attracted much attention due to its long-distance reading and high storage capacity. It can not only help an enterprise greatly improve the efficiency of goods and information management, but also allow sales companies and manufacturing companies to connect, so as to receive feedback information more accurately, control demand information, and optimize the entire supply chain.
