In the early 1940s, radar improvements and applications gave birth to radio frequency identification (RFID) technology. After a long period of exploration, RFID has played a pivotal role in public safety, manufacturing, and logistics management.
Detailed Explanation of RFID Technology and New Labeling Process
DRID
RFID (RFID, RBdio Frequency Identification) technology is a non-contact automatic identification technology. It automatically recognizes target objects and acquires related data through spatial coupling (alternating magnetic field or electromagnetic field) to achieve target identification and data exchange. , Identifying work without human intervention.
The basic working principle of the AFID system can be illustrated by Figure 1. The signal to be sent by the reader is encoded and loaded on the carrier signal of a certain frequency and sent out by the antenna. The electronic tag entering the working area of the reader receives the pulse signal. The relevant circuit in the chip in the tag demodulates this signal, decodes it, decrypts it, and then judges the command request, password, and permissions. If it is a read command, the control logic circuit reads the relevant information from the memory, encrypts, encodes, modulates, and then sends the signal to the reader through the antenna in the electronic tag, and the reader demodulates, decodes, and decrypts the received signal. Send to the central processing system for data processing; if it is to modify the information of the write command, the internal control of the logic caused by the charge pump to raise the working voltage, to provide rewritable contents of EEPRQM to rewrite, if it is judged that the corresponding password and authority does not match , an error message is returned.
Application of RFID system
The era of the International Internet of Things is approaching. It is reported that RFID technology has been widely used in European and American markets. As RFID technology in the Chinese market matures and the price of RFID tags decreases, RFID electronic labels will replace traditional one-dimensional bar codes and two-dimensional codes. If the two-dimensional code is an extension of the one-dimensional code label, then the birth of RFID is a revolution in the label industry. Its application areas are mainly in the following areas:
1. Logistics Management
Logistics is the largest application space for RFID, which can greatly improve the efficiency of the logistics link and provide technical guarantee for achieving zero inventory. The global retail giant Wal-Mart and Germany's Metro have strongly promoted the use of RFID tags. They have used RFID technology in supermarkets to realize product identification, anti-theft, real-time inventory and product expiration control.
2. Food safety
The food safety issue is a major issue for the people's livelihood in a country. RFID technology can ensure food safety in all aspects through the entire management records of the original planting or breeding process of foods and the forward tracking and backward tracing of food circulation.
3 commodity anti-counterfeiting
Commodity anti-counterfeiting can guarantee normal market order and consumer credit and has huge market space. The use of RFID anti-counterfeiting technology and wireless communication network can realize the quality inspection of goods at any time and any place. Currently, it is already in the smoke and alcohol. Pilots on medicines and other commodities.
4. Application in other fields
RFID has a very wide range of applications, such as traffic management, military product management, security, animal husbandry and pet management, library management, etc., have great application prospects.
RFID tag antenna preparation technology
The core issue affecting RFID promotion is chip technology and cost. As shown in Figure 2, the RFID tag is mainly composed of a substrate, an antenna, and a chip. The antenna layer is a main functional layer, and its purpose is to transmit the maximum energy into and out of the tag chip. Compared with the traditional etching method and the winding method, the direct printing method of the tag antenna greatly saves the cost.
With its unique advantages, RFID tags are gradually applied in various fields. People are committed to studying the drawbacks of traditional methods of preparation. Inkjet printing as a tag antenna new technology, relying on the advantages of low cost, good conductivity, no pollution, and easy to control the antenna pattern, will make RFID technology more widely used.
