Effective value compensation method and system for micro-trace fluorescence detector

Abstract

The invention relates to a micro-trace fluorescence detector effective value compensation method, which comprises the following steps of a, collecting to obtain original data of a diaphragm fluorescence value; b, performing smooth filtering on the original data; c, calculating to obtain a detection peak value according to data subjected to smooth filtering; d, modifying the detection peak value so as to compensate the fluorescence material detection effective value. The invention also relates to a micro-trace fluorescence detector effective value compensation system. The dynamic data compensation can be performed according to the diaphragm use state; the sensitivity and the false alarm rate of an instrument are stabilized; the service life of a diaphragm is prolonged.

Description

technical field [0001] The invention relates to a method and system for compensating the effective value of a micro-trace fluorescence detector. Background technique [0002] Compared with traditional explosive detection instruments, micro-trace fluorescence detectors have the characteristics of high sensitivity and fast response, and have broad application prospects in important security inspection places such as subways and airports. At the heart of such devices is a glass substrate coated with an organic thin-film material that has fluorescence-quenching properties for explosive molecules. When explosive molecules touch the film material, the amount of fluorescence will decrease, and the instrument can determine whether there are explosive molecules by detecting the change of fluorescence intensity. [0003] Inevitably, like most organic fluorescent materials, due to factors such as photobleaching and membrane pollution, the fluorescence intensity of this type of organic...

AI Technical Summary

Problems solved by technology

Because the fluorescence change produced by the new diaphragm for a certain concentration of substances exceeds the alarm threshold, and in the later period of use, with the consumption of the diaphragm, the fluorescence change produced by the same amount of substances is lower than the alarm threshold, and the alarm cannot be issued.

[0004] For most explosive detection instruments, there are two parameters of false alarm rate and sensitivity, and these two key parameters are mutually restricted. Blindly increasing one of the parameters will lead to a decrease in the other parameter, especially for fluorescence detection instruments , because the fluorescent diaphragm is a consumable, it needs to be replaced regularly according to the usage situation. The newly replaced diaphragm is more sensitive and active, and the data jitter is relatively large, which is easy to false alarm. In order not to reduce the false alarm rate, the alarm threshold needs to be set relatively Higher, so that the false alarm rate and sensitivity get an effective balance, but with use, the diaphragm becomes more and more sluggish, and the data jitter is relatively small, but when the alarm threshold remains unchanged, some sensitivity will drop rapidly , causing some things that should be detected to not be detected

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