Infrared medium identification method and device

The invention provides an infrared medium identification method and device, and relates to the technical field of medium type identification, and the method comprises the steps: obtaining a first infrared signal, received by an infrared receiver at a current moment, of a to-be-identified medium and a second infrared signal, received at a previous moment, of the to-be-identified medium; determiningintermediate signal data after filtering convergence based on an LMS adaptive rule, the first infrared signal and the second infrared signal; determining a third infrared signal of the to-be-identified medium according to a preset fitting function and the intermediate signal data; and determining the type of the medium to be identified based on the third infrared signal and an infrared signal threshold corresponding to a preset fitting function, wherein the preset fitting function, the type of the medium and the infrared signal threshold have a one-to-one correspondence relationship, and therange and resolution of th