Total nitrogen rapid detection method, device and equipment based on fluorescence spectrum and medium

The invention discloses a fluorescence spectrum-based total nitrogen rapid detection method, device and equipment and a medium, and the method comprises the following steps: step 1, obtaining aliasing fluorescence spectrums of N water samples in the digestion process by using a micro fluorescence spectrometer, and carrying out denoising treatment; step 2, adopting an independent component analysis method to unmix the aliasing fluorescence spectrums of each water sample subjected to denoising treatment to obtain fluorescence spectrums of various substances in the water sample and concentration coefficients of the fluorescence spectrums; 3, training a total nitrogen rapid online detection model based on a support vector machine regression model according to the concentration coefficients of various substances of all the water samples and the known total nitrogen concentration of the water samples; and 4, for a water sample with total nitrogen to be detected, acquiring concentration coefficients of various subst