What is rfid? Detailed explanation of rfid technology

Radio frequency identification, 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 related data without the need to establish a mechanism between the identification system and the specific target. or optical contact.

In terms of radio frequency, it is usually microwave, 1-100GHz, suitable for short-distance identification communication.

RFID readers are also divided into mobile and fixed types. Currently, RFID technology is widely used in libraries, access control systems, food safety traceability, etc.

Radio frequency identification (RFID) is a wireless communication technology that can identify specific targets and read and write related data through radio signals without establishing mechanical or optical contact between the identification system and the specific target.

The radio signal transmits data from the tag attached to the item through the electromagnetic field tuned to the radio frequency to automatically identify and track the item. Some tags can obtain energy from the electromagnetic field emitted by the identifier during recognition, and do not require batteries; some tags themselves have power sources and can actively emit radio waves (electromagnetic fields tuned to radio frequencies). The tags contain electronically stored information and can be identified within several meters. Unlike barcodes, RF tags do not need to be in the line of sight of the reader and can be embedded in the object being tracked.

Radio frequency identification technology is used in many industries. By attaching the tag to a car in production, the factory can track the car's progress on the production line. Warehouses can track the location of drugs. Radio frequency tags can also be attached to livestock and pets to facilitate positive identification of livestock and pets (positive identification means preventing several livestock from using the same identity). RFID tags allow workers to enter locked parts of buildings, and RF transponders on cars can be used to collect tolls and parking lots.

Some radio frequency tags are attached to clothing, personal belongings, and even implanted into the human body. This technology also poses privacy concerns because it may read personal information without the person's permission.

Features

Radio frequency technology

The most important advantage of the radio frequency identification system is non-contact identification, which can penetrate snow, Read labels in harsh environments where fog, ice, paint, dirt and barcodes cannot be used, and the reading speed is extremely fast, less than 100 milliseconds in most cases. The shorthand capability of active RFID systems is also an important advantage. Can be used for interactive services such as process tracking and maintenance tracking.

The main problem restricting the development of radio frequency identification systems is incompatible standards. The major manufacturers of radio frequency identification systems provide specialized systems, resulting in different applications and different industries using frequencies and protocol standards from different manufacturers. This confusion and fragmentation has restricted the growth of the entire radio frequency identification industry. Many European and American organizations are working to solve this problem and have achieved some results. Standardization will surely stimulate the substantial development and widespread application of radio frequency identification technology.

Applicability

The essence of logistics management is to achieve the two purposes of reducing costs and improving service levels through the management of the entire logistics process. How to ensure that the right customers get the right products at the right time and at the right place at the right cost and on the right conditions has become the highest goal pursued by logistics companies. Generally speaking, the value of a company's inventory accounts for about 25% of the company's total assets and more than 50% of the company's current assets. Therefore, the core of logistics management work is the management of inventory in the supply chain.

Using radio frequency identification technology in transportation management, you only need to install electronic tags on the outer packaging of goods and set up readers at transportation inspection stations or transfer stations to achieve visual management of assets. At the same time, cargo owners can access the in-transit visualization webpage based on their permissions to understand the specific location of the goods, which is of great significance to improving the service level of logistics companies.

Performance Features

1. Fast scanning. The RFID reader can identify and read several RFID tags at the same time!

2. Small size and diversified shapes. RFID is not limited by size or shape in reading, and does not need to match the fixed size and printing quality of the paper for reading accuracy. In addition, RFID tags can be miniaturized and diversified to be used in different products.

3. Anti-pollution ability and durability. The carrier of traditional barcodes is paper, so they are susceptible to contamination, but RFID is highly resistant to substances such as water, oil, and chemicals. In addition, since barcodes are attached to plastic bags or outer packaging cartons, they are particularly susceptible to damage; RFID tags store data in chips, so they are protected from contamination.

4. Reusable. Today's barcodes cannot be changed after they are printed, while RFID tags can repeatedly add, modify, and delete the data stored in the RFID tag to facilitate information updates.

5. Penetrating and barrier-free reading. When covered, RFID can penetrate non-metallic or non-transparent materials such as paper, wood and plastic, and can communicate penetratingly. The barcode scanner must be at a close distance and not blocked by objects before it can read the barcode.

6. The data memory capacity is large. The capacity of one-dimensional barcode is 50Bytes, the maximum capacity of two-dimensional barcode can store 2 to 3000 characters, and the maximum capacity of RFID is tens of trillions of characters. With the development of memory carriers, data capacity has also been expanding. In the future, the amount of data that items need to carry will become larger and larger, and the demand for expanded capacity of tags will also increase accordingly.

7. Security. Since RFID carries electronic information, its data content can be protected by password, making its content difficult to be forged and altered.

RFID has attracted much attention due to its long-distance reading, high storage capacity and other characteristics. It can not only help a company greatly improve the efficiency of goods and information management, but also allow sales companies and manufacturing companies to interconnect, thereby receiving feedback information more accurately, controlling demand information, and optimizing the entire supply chain.

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