Method for adjusting measurement range of fluorescence immunochromatography reading instrument

The invention relates to a method for adjusting a measurement range of a fluorescence immunochromatography reading instrument. The method comprises the following steps: detecting a light source excitation test strip of the fluorescence immunochromatography reading instrument at a detection window; receiving a fluorescence signal obtained by exciting the test strip by a photoelectric detector and converting the fluorescence signal into an electric signal; processing the electric signal through a conditioning circuit and inputting the signal into a CPU (Central Processing Unit) to be subjected to optimization calculation, so as to obtain a fluorescence characteristic quantity of the test strip; meanwhile, judging an amplitude characteristic and carrying out feedback adjustment on a digital potentiometer through a bus interface; adjusting parameters of a constant-current source circuit in real time to control light source driving current by the adjustable constant-current source circuit; and adjusting the light