Electronic Tag is also called smart tag, which is tag or Smart Label in English. Its core is a small memory chip using RFID technology. Let's talk about it
Electronic tag description
1, characteristics of electronic tags
Data storage: Compared with the traditional tag, it has a larger capacity (1bit-1024 bit), and the data can be updated and read and written at any time.
Reading and writing speed: Compared with bar code, it does not need linear alignment scanning, so it is faster to read and write, and can realize multi-target recognition and action recognition.
Easy to use: small size, easy to package, can be embedded in the product.
Security: special chip, unique serial number, difficult to copy.
Durable: no mechanical failure, long service life and resistance to harsh environment.
2. Technical principle
A typical RFID system consists of an electronic tag, a reading/writing device and a data exchange and management system. Electronic tag, also known as radio frequency card, has the ability of intelligent reading and writing and encrypted communication. The reader consists of a wireless transceiver module, an antenna, a control module and an interface circuit. There is no battery in the electronic tag, and the working energy of the electronic tag is provided by the radio frequency pulse sent by the reader. The electronic tag receives the RF pulse, rectifies it and charges the capacitor. The capacitor voltage is stabilized to the operating voltage. The data demodulation section demodulates data from the received RF pulse and sends it to the control logic. The control logic accepts instructions to complete storage, data transmission or other operations. EEPROM is used to store the ID number and other user data of electronic tags. There is also an active RFID system, powered by batteries, which can work in a higher frequency band, have a longer recognition distance and have a higher communication rate with readers.
RFID systems are divided into low frequency, intermediate frequency and high frequency systems according to different working frequencies. Generally, the low frequency system works at 100k~500kHz, and the intermediate frequency system works at 10MHz~ 15MHz, which is mainly suitable for applications with short identification distance and low cost. The high frequency system can reach 850~950MHz and 2.4~5GHz microwave bands, which is suitable for occasions with long recognition distance and high data reading and writing rate.
3. Comparison of identification technologies
As far as bar code, magnetic card, ic card, RFID and other identification technologies are concerned, they all have their own characteristics and are suitable for application. The following table lists the characteristics and differences of several identification technologies.
4. Compared with bar codes, the advantages of electronic labels
You can read and write easily even if you can't see it; Able to work in various complex environments; Can be easily embedded or attached to different products in different forms; Longer reading and writing distance, three-dimensional reading and writing mode; Greater storage capacity; With key protection, it is more secure and difficult to forge.
Application of electronic tag
As a data carrier, electronic tag can play the role of identity identification, item tracking and information collection. In foreign countries, electronic tags have been used in a wide range of fields.
The RFID system consisting of electronic tag, reader, antenna and application software is directly connected with the corresponding management information system. Everything can be tracked accurately. This comprehensive information management system can bring many benefits to customers, including real-time data collection, secure data access channel, and all product information can be obtained offline. Abroad, RFID technology has been widely used in many fields, such as industrial automation and commercial automation. The scope of application includes:
1, anti-counterfeiting
Through scanning, detailed logistics records are generated.
(1) production line management
Electronic tag can conveniently and accurately record the process information and process operation information on the production line, which meets the requirements of flexible production. The record of workers' job number, time, operation and quality inspection results can completely realize the traceability of production. It can also avoid errors caused by handwriting and reading information in production environment.
(2) Warehouse management
The application of RFID system to the goods management of intelligent warehouse effectively solves the information management of warehouse goods. For large storage bases, the management center can know the location and storage of goods in real time, which is of great significance for improving storage efficiency, feeding back product information and guiding production. It not only increases the number of goods handled in one day, but also can monitor all the information of goods. Among them, there are various application forms, which can be labeled on the goods and read and written by readers on forklift trucks and readers in corresponding positions in warehouses; You can also combine bar codes with electronic labels.
(3) Sales channel management
It is a strong demand of many enterprises to establish strict and orderly channels and effectively manage the purchase, sale and storage. In the production process, products are embedded in electronic labels, which contain unique product numbers. Manufacturers can monitor the flow of products with identifiers, and wholesalers and retailers can identify the legitimacy of products with readers provided by manufacturers.
3, valuables management
It can also be used in cameras, camcorders, portable computers, CD walkman, jewelry and so on. Anti-theft, settlement and after-sales protection of valuables. Its anti-theft function belongs to Electronic Commodity Anti-theft System (EAS). Labels can be attached to or embedded in the packaging of articles. A special shelf scanner will scan goods in real time and get real-time inventory records. If the goods are taken from the price, the system will verify whether this behavior is legal, and if the goods are taken illegally, the system will call the police.
When the bill leaves the warehouse, all different kinds of items can be scanned by the scanner at one time, and the anti-theft function is released at the same time when the sales slip is generated at the cashier. In this way, when customers leave with shopping items, the alarm will not sound. When the customer pays the bill, the cashier will write down the date of sale on the label, so that the goods purchased by the customer can also be guaranteed and promised accordingly.
4. Book management and rental product management
Attaching electronic labels to books can receive book information conveniently, and it is not necessary to move books when sorting books, which can improve work efficiency and avoid work mistakes.
5. Others, such as logistics, car anti-theft and air parcel management.