Radio frequency card detection device and radio frequency card detection method thereof

Abstract

The invention relates to a radio frequency card detection device and a radio frequency card detection method thereof. The radio frequency card detection device comprises a single-chip microcomputer unit, a radio frequency receiving and transmitting unit and a detector circuit, the single-chip microcomputer unit is provided with a built-in comparator and connected with the radio frequency receiving and transmitting unit, an output end of the radio frequency receiving and transmitting unit is connected with an input end of the detector circuit, and an output end of the detector circuit is connected with an input end of the built-in comparator of the single-chip microcomputer unit. The radio frequency card detection method is characterized in that within the same starting time of the radio frequency receiving and transmitting unit, processing is performed by the aid of the detector circuit, the comparator has level turnover time, the level turnover time of a card approaching a card reader is different from that without a card approaching the card reader, whether the card approaches the card reader or not can be judged by judging the size of the level turnover time, the radio frequency card is detected, and the whole card reading process is started when the card approaches the card reader. The radio frequency card detection device is simple in structure and low in cost, fewer components are used, card searching power consumption is greatly reduced, spurious triggering caused by influence of environmental factors can be avoided, and reliability is improved.

Description

technical field [0001] The invention relates to the technical field of radio frequency card detection, in particular to a radio frequency card detection device and a radio frequency card detection method thereof. Background technique [0002] The development of RFID technology (Radio Frequency Identification Technology) has brought more and more convenience to people, such as logistics tracking, identification, one-card and so on. Now NFC technology, which has grown from RFID, has also sprung up on smartphones, and it is used in sharing electronic business cards, pictures, and application connections of third-party applications on APP smartphones. The application carriers of these contactless technologies are the card reader and the card itself. The card reader usually consumes tens or even hundreds of milliamps of current in the process of reading the card. In handheld devices and power-sensitive applications , such as the door lock industry, this is a relatively large app...

AI Technical Summary

Problems solved by technology

[0010] The present invention mainly solves the problem that the original card detection device and method use many circuit components, the cost is high, and it consumes more power consumption. At the same time, it is susceptible to interference and has low reliability, so it is not suitable for low-power handheld devices. And the technical problems of power consumption-sensitive industries; provide a radio frequency card detection device and its radio frequency card detection method, the circuit structure is simple, the components used are less, the cost is low, and the power consumption required is low, and it is not easy to be affected by Interference, high reliability, meet the application needs of low-power handheld devices and contactless cards in power-sensitive industries

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