Gas pool parameter design method and device based on absorbance spectrophotometry and detection system

Abstract

The invention discloses a gas pool parameter design method and device based on an absorption spectrophotometry and a detection system. The method comprises the following steps: determining a first relationship between received light energy of a detector and output light energy of a light source according to a first reflectivity of a first endoscope, a second reflectivity of a second endoscope andloss in a gas pool cavity; according to the Lambert-Beer law, determining a second relationship among the loss in the gas pool cavity, the gas concentration, the extinction coefficient and the lengthof the gas pool cavity; determining a third relationship among the gas concentration, the first reflectivity, the second reflectivity and the transmittance according to the first relationship and thesecond relationship, wherein the transmittance is determined according to output light energy and received light energy; calculating a multiplication factor and a matched light power factor of the light path according to the second relationship and the third relationship; and determining gas pool parameters according to a preset detection requirement, the multiplication factor of the optical pathand the matched light power factor. By implementing the method, an optimized gas pool parameter design scheme can be obtained, and the problem of parameter design of the absorption gas pool can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of optical sensing, in particular to a gas cell parameter design method, device and detection system based on absorbance photometry. Background technique [0002] Absorption photometry is an optical sensing method, which is based on the law of absorption and attenuation of radiation at a specific wavelength by the gas within the optical path between the radiation source and the receiving detector. It is widely used in various gas detection. The specific application of this method for detection is based on a fluid gas cell, a radiation source is placed at one end, and a photodetector is placed at the other end, and the response between the two is determined by the relative change of the light intensity before and after gas absorption and the concentration of the gas. function curve. [0003] With the development of technology, various parts such as gas circuit, detector, light source, and gas cell optical pa...

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a gas cell parameter design method, device, and detection system based on absorbance photometry, so as to solve the problem in the prior art that it is impossible to determine how to design the gas cell parameters in the reciprocating catadioptric gas cell. question

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