Active RFID identification system and control method thereof for accurately reading boundary

Abstract

The invention discloses an active RFID identification system and a control method thereof for accurately reading a boundary. The active RFID identification system consists of an active RFID card reader and an active RFID card, wherein the active RFID card reader comprises a low-frequency transmitting device used for continuously transmitting low-frequency trigger signals, and a high-frequency receiving device used for receiving a confirmation signal transmitted by the active RFID card; and the active RFID card comprises a low-frequency receiving device used for receiving the low-frequency trigger signals transmitted by the low-frequency transmitting device of the active RFID card reader and modulating coded information of the low-frequency trigger signals at the same time, and a high-frequency transmitting device used for receiving a confirmation signal transmitted by a logic control circuit and transmitting the confirmation signal to the receiving device of the active RFID card reader. The invention combines advantages of the low-frequency trigger signals and a high-frequency receiving function, so the card reading distance can be accurately controlled.

Description

technical field [0001] The invention relates to an RFID identification system and its identification technology, belonging to the electronic field, in particular to an active RFID identification system and a control method for accurate reading boundaries thereof. Background technique [0002] In the management of vehicle entry and exit in the parking lot, RFID identification technology can be used to identify moving objects and identify multiple tags at the same time, and the operation is fast and convenient. Therefore, RFID identification technology is widely used in existing vehicle identification technologies. Short-range (about 10cm) RFID cards and long-distance (tens of centimeters to more than 100 meters) RFID cards, however, many RFID card identification technologies have fatal flaws: such as [0003] a) Passive RFID card in HF frequency band: Due to the weak signal of the RFID card in HF frequency band, the window must be opened and the card scanned manually. [000...

AI Technical Summary

Problems solved by technology

[0014] Based on the deficiencies of existing RFID identification technology, the present invention develops an active RFID identification system, which controls the transmission distance through low-frequency trigger signals, and is used to solve the problem of using traditional RFID cards to identify vehicles in efficient and non-stop vehicle traffic management The problem of accurate correspondence between identities and identified vehicles

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