Low-frequency magnetic transmission communication reader for liquid and tag for the same

Abstract

The invention provides a low-frequency magnetic transmission communication reader for liquid. The reader comprises a first master control module used for controlling reading or writing of tag information, a first encoding module used for encoding requesting information, a frequency mixing module used for generating modulation request signals, at least one reader antenna used for sending the modulation request signals to a tag in an inductive coupling mode and for receiving tag modulation signals in an inductive coupling mode, a first power amplifier module used for driving the reader antenna, and a first antenna matching module used for carrying out impedance matching on at least one reader antenna under the control of the first master control module. The invention further provides a low-frequency magnetic transmission communication tag for liquid. The inductive coupling mode is adopted for signal transmission, and the mode of signal transmission is mainly magnetic transmission. Data communication between the reader and the tag is realized by utilizing the characteristic that magnetic signal transmission is not separated by liquid.

Description

technical field [0001] The invention relates to the technical field of wireless information collection, in particular to a reader and label for low-frequency magnetic transmission communication of liquids. Background technique [0002] Modern information management requires automatic collection and processing of information. At present, the automatic (wireless) collection technology of information mainly uses RFID technology to transmit information. RFID radio frequency identification is a non-contact automatic identification technology, which 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 tags at the same time, and the operation is fast and convenient. [0003] An RFID system usually consists of the following three parts: [0004] Tag...

AI Technical Summary

Problems solved by technology

Electronic tags need to be kept clean and cannot be used in harsh environments

If water or oil stains adhere to the surface of the electronic tag, the reading accuracy will also be affected

[0016] The reading distance of the third method is limited, usually 10-60 cm, which cannot be applied to data reading that requires a long working distance in a liquid environment

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