Ultra-low power consumption photoactivatable electronic tag and card reader system and signal processing method thereof

Abstract

The invention discloses an ultra-low power consumption photoactivatable electronic tag and card reader system. The ultra-low power consumption photoactivatable electronic tag and card reader system consists of an ultra-low power consumption photoactivatable electronic tag and a card reader, wherein the electronic tag comprises a photodiode, a limiting amplifier, a passive high-pass filter, a signal comparator, a microprocessor A with microwatt power consumption and an LED, and the card reader comprises an optical receiver, a microprocessor B with microwatt power consumption, an LED driving circuit and an LED array. When the ultra-low power consumption photoactivatable electronic tag and card reader system works, a tag ID (identity) code to be queried is sent out by the LED array after the tag ID code to be queried is modulated by the card reader; when an optical signal emitted by the card reader is received by the electronic tag, the optical signal is amplified, conditioned and compared in the tag, and is subsequently judged by the microprocessor A with the microwatt power consumption on the electronic tag; when the query ID emitted by the card reader is different from the built-in ID of the tag, the tag does not respond; when the query ID emitted by the card reader is the same with the built-in ID of the tag, LED on the tag is lightened; and meanwhile, a signal can be sent to the card reader by the LED.

Description

Technical field: [0001] The invention belongs to the field of intelligent electronic labels, and relates to an ultra-low power consumption light-activated electronic label and card reader system that can adjust the identification range at will, and also relates to a signal processing method of the system. Background technique: [0002] RFID radio frequency identification is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects, and can identify multiple electronic tags at the same time, which is fast and convenient to operate. [0003] RFID tags are already a very mature technology and have been widely used. Passive RFID tags use the coupling effect between the antenna and the radio frequency electromagnetic field em...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide an ultra-low power consumption light-activated electronic tag and card reader system, which overcomes the defects that the RFID tag antenna is large in size and the tag communication channel is easily interfered

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