The invention belongs to the technical field of spectrum detection, and particularly relates to a spectrum smell recognition module which comprises a
light source device, a first concave reflector
assembly, a second concave reflector
assembly, two angle-adjustable reflectors and a spectrum sensor
assembly. A gas spectrum
absorption cell and a gas spectrum
reference cell are formed between the first concave reflector and the second concave reflector, a transparent optical window is arranged between the gas spectrum
absorption cell and the gas spectrum
reference cell for isolation, and an angle-adjustable reflector is arranged at each of the two ends of the gas spectrum
reference cell; by synchronously switching the angles of the two angle-adjustable reflectors, the real-
time switching of the spectrum smell recognition module between the gas spectrum
absorption cell and the gas spectrum reference
cell is realized, and the intensity of the gas spectrum absorption
signal is superposed and accumulated through multiple times of switching to carry out spectrum
signal analysis. According to the invention, the intensity of a gas spectrum absorption
signal and the accuracy and stability of a spectrum signal are improved, and meanwhile, the self-
calibration function of the spectrum smell recognition module is also realized.