On the Composition and Working Principle of RFID System - Tigerwong

RFID system is widely used in intelligent parking lot. Through this system, when the vehicle enters the lane, the system automatically identifies and opens the road gate, which can realize the rapid entry and exit of the vehicle in and out of the parking lot without parking and swiping the card like the traditional parking lot system. RF equipment system is an intelligent and efficient parking management scheme. What is the principle of RFID system? To answer this question, let's first look at the system composition. RFID system is generally composed of three parts: card reader, RF tag and antenna. 1. The card reader, also known as reader, is a device used to read information. In the parking lot system, the card reader is installed at the entrance and exit of the parking lot to read the user information on the tag card. Of course, it can also write information to the tag card. 2. The tag card can be called RF tag card. Its function in the system is to store information. It is composed of coupling elements and chips, and has a built-in antenna, which can communicate with the RF antenna. In the parking lot application, the RF card shall be installed in the user's vehicle and store the user information. When the vehicle enters the lane, the card reader will automatically read the tag card information and open the gate after judgment. 3. The antenna is used to transmit the RF signal between the tag card and the card reader. Knowing the above equipment, we can understand the working principle of RFID system. The card reader sends a certain frequency RF signal through the antenna. When the vehicle equipped with the tag card enters the working range of the transmitting antenna, the tag card will generate induced current and be activated to automatically release the information in the card. The card reader receives the signal for demodulation and decoding to obtain the information in the tag card, and then sends it to the background system for relevant processing, The background system will judge the legitimacy of the label card and make corresponding processing according to the judgment. This is a brief introduction to RFID system. Thank you for reading.