Radio frequency identification (RFID) technology is an automatic recognition technology that acquires the relevant data of an object through a radio frequency signal and identifies the object. RFID technology does not need to be in direct contact with the object being identified, that is, it can complete the input and processing of information. It can quickly and accurately collect and process information. It is one of the top 10 major intelligent technologies in the 21st century.
RFID uses an electronic tag to mark an object. The electronic tag contains an electronic chip and an antenna. The electronic chip stores data of the object. The antenna is used to send and receive radio waves. The antenna of the electronic tag transmits the data of the object to a nearby RFID reader/writer through radio waves, and the RFID reader/writer will collect and process the received data. RFID does not require manual intervention, can work in various harsh environments, can identify high-speed moving objects, can achieve remote reading, and can identify multiple targets at the same time. Compared with traditional barcode recognition, RFID has a great advantage. Its advantages and characteristics are as follows:
1. High RFID tag security
Barcodes are composed of different widths and spaces that are arranged in parallel. The barcodes are easy to produce and operate, but they also have the disadvantages of easy copying and poor confidentiality of information. The electronic chip used by the RFID tag stores information, and its data can be password-protected by encoding, and its content is not easily forged or altered.
2. Large RFID tag capacity
The capacity of one-dimensional barcodes is limited. Although the capacity of two-dimensional barcodes is much larger than that of one-dimensional barcodes, the maximum capacity can only store 3,000 characters. The capacity of RFID tags can be dozens of times of the capacity of two-dimensional barcodes. With the development of memory carriers, the capacity of data will become larger and larger, and real “one-one-one-one” can be realized, meeting the increasing information flow and information. The need for ever-increasing processing speeds.
3. RFID can identify multiple tags at a distance
Only one bar code is scanned at a time, and the bar code is required to be closer to the collector. Radio frequency identification uses radio waves for data exchange. RFID readers can identify multiple RFID electronic tags at a distance and can process and transmit information through computer networks.
4. Strong anti-fouling ability of RFID tags
The traditional bar code carrier is paper, which is attached to a plastic bag or an outer box and is particularly vulnerable to breakage. The bar code adopts optical recognition technology. If the carrier of the bar code is contaminated or damaged, it will affect the correct identification of the object's information. RFID uses electronic chips to store information and can be protected from external environmental contamination.
5. RFID is the cornerstone of the Internet of Things
Barcode printing cannot be changed. RFID uses electronic chips to store information and can record any information of an item at any time, and can easily add, change, and delete information. Through computer networks, RFID can enable manufacturing companies to connect with sales companies, keep abreast of the real-time information in the process of production, transportation, and sales of items, and realize transparent management of items, realizing the “Internet of Things” in the true meaning.