A semi-active RFID low-frequency trigger antenna ID matching method
A technology of low frequency triggering and matching method, applied in the direction of instruments, inductive record carriers, electromagnetic radiation induction, etc., can solve the problems of trouble, low frequency trigger antenna number recognition rate, incorrect judgment of entry and exit, etc., to achieve high execution efficiency and practicability Powerful, simple to achieve
Active Publication Date: 2020-02-11
浙江水木物联技术有限公司
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Problems solved by technology
However, based on the use of semi-active RFID tags, there is a problem that the identification rate of the low-frequency trigger antenna number is not high
For example, in the use of electronic school badges, it is necessary to identify whether the students have entered or exited the campus by identifying the number (ID) of the internal and external low-frequency trigger antennas.
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[0025] Such as figure 2 , image 3 As shown, a semi-active RFID low-frequency trigger antenna ID matching method first encodes through an encoder, then decodes through a decoder, and finally decodes and outputs through a fuzzy matching algorithm. The encoder is a 125KHz low-frequency trigger, and the 125KHz low-frequency trigger The device is used to synchronously and periodically radiate two fixed antenna ID signals outward through two external antennas. The low-frequency signal adopts the binary on-off keying OOK (On-Off Keying) modulation mechanism, that is, the signal is modulated by a switch. On is signal 1, off is signal 0. The numbers of the two antennas are both encoded in an 8-bit signal element, for example, the antenna ID (binary representation) is 00000000, 11110000, 10101010, and so on. The decoder includes a low-frequency wire, a low-frequency trigger module, a power supply VCC, a 2.4GHz antenna, a crystal oscillator, and a core control module, the low-frequen...
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The invention discloses a matching method of a semi-active RFID low frequency trigger antenna ID. The matching method of a semi-active RFID low frequency trigger antenna ID is characterized in that encoding through an encoder; decoding through a decoder; and then decoding and outputting the antenna ID through a fuzzy matching algorithm, wherein the encoder is a 125KHz low frequency trigger; the 125KHz low frequency trigger is used for radiating fixed two antenna ID signals to the outside through synchronization of two external antennas periodically; and the decoder includes a low frequency electric wire, a low frequency trigger, a power supply VCC, a 2.4GHz antenna, a crystal oscillator and a core control module. The matching method of a semi-active RFID low frequency trigger antenna ID can improve the recognition rate of the low frequency trigger antenna ID, without changing any hardware equipment.
Description
technical field [0001] The invention relates to a semi-active RFID low-frequency trigger antenna ID matching method. Background technique [0002] At this stage, semi-active RFID tags have been more and more used in daily life, which greatly facilitates our daily life, such as electronic school badges, automatic punch cards, smart parking lots, automatic library management systems, etc. However, based on the use of semi-active RFID tags, there is a problem that the identification rate of the low-frequency trigger antenna number is not high. For example, in the use of electronic school badges, it is necessary to identify whether the students have entered or exited the campus by identifying the number (ID) of the internal and external low-frequency trigger antennas. At this time, if the identification is wrong, it is likely to cause errors in the judgment of entry and exit, which will cause trouble. Contents of the invention [0003] The purpose of the present invention is ...
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IPC IPC(8): G06K7/10
CPCG06K7/10356
Inventor 毛续飞韩建康曹鹏飞
Owner 浙江水木物联技术有限公司