Photoelectronic label, photoelectronic label reader-writer and method for reading and writing photoelectronic label

Abstract

The invention provides a photoelectronic label, a photoelectronic label reader-writer and a method for reading and writing the photoelectronic label. The photoelectronic label specifically comprises a photovoltaic conversion module, a demodulation module, a processor module, a modulation module and a light reflection module. The photovoltaic conversion module is used for receiving laser beams emitted by the photoelectronic label reader-writer and converting modulated optical signals into electric signals. The demodulation module is used for demodulating the electric signals output by the photovoltaic conversion module, and digital signals are obtained. The processor module is used for obtaining electric signal type communication data sent to the photoelectronic label reader-writer according to the digital signals obtained through demodulation. The modulation module is used for modulating the electric signal type communication data into optical signals. The light reflection module is used for reflecting the laser beams emitted by the photoelectronic label reader-writer, and loading the optical signals output by the modulation module to the reflected laser beams. The convenience for reading and writing the label can be improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an optoelectronic tag, an optoelectronic tag reader-writer and a method for reading and writing the optoelectronic tag. Background technique [0002] A Radio Frequency Identification (RFID, Radio Frequency Identification) system generally includes a tag and a reader. The tag is the data carrier of the RFID system, and each tag has unique identification information (ID); the main task of the reader is to control the radio frequency module to send a read command to the tag, and receive the response returned by the tag, decode it, and then The decoded information is transmitted to a central information system for processing. [0003] The RFID system uses radio communication, and the transmission method belongs to electromagnetic wave transmission. The range of the tag's operable area is not easy to clearly and intuitively define. In this way, it is very difficult to...

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Problems solved by technology

[0005] For another example, in the mode of one reader for multiple tags, the RFID system needs to quickly identify all tags within a certain range, but since multiple tags work in the same frequency band, the information of multiple tags will inevitably collide. So it is difficult to tell which tag is being read at this time

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