Infrared spectrum detection device and method capable of changing optical path

Abstract

The invention discloses an infrared spectrum detection device and method capable of changing an optical path. The infrared spectrum detection device comprises an infrared detector, an air chamber, a condensing lens, an optical coupler, an optical fiber and a collimator, wherein the air chamber is a cylinder which is small in height and internally provided with a cavity, and smooth mirror surfaces are arranged on the periphery of the inner wall of the cylindrical surface of the cylinder; the air chamber is provided with an air inlet, an air outlet and a light inlet; the infrared detector and the collimator are arranged at the light incident port, and the optical coupler is connected with the collimator through the optical fiber; and infrared light emitted by the broadband light source and collected by the condensing lens is condensed into light beams, and the light beams are transmitted to the collimator through the optical coupler to be emitted into the air chamber. According to the infrared spectrum detection device and teh method provided by the invention, the optical path is changed by changing the propagation path of light, and the detection requirements on gases with different concentrations in the experiment process are met.

Description

Technical field[0001]The present invention relates to the field of spectral measurements, and more particularly to an infrared spectroscopy detecting apparatus and method that can change the optical path.Background technique[0002]Since the 1970s, SF6 has been widely used in electrical equipment due to its good insulation performance and arc performance, but because it is a very high gas, it will have a long-term adverse effect on the environment. Therefore, many scholars have begun to replace SF for potential6Environmentally friendly gas deployment research. Research on environmentally friendly gas is mainly concentrated in CF3I, c4Fly7N, C5Fly10O et al, when studying its decomposition characteristics, the chromatographic detection method, chromatographic spectrometry and infrared spectroscopy are generally detected.[0003]During the detection of infrared spectroscopy, the longer the optical path, the more obvious the infrared spectral absorption, the higher the measurement sensitivi...

AI Technical Summary

Problems solved by technology

In the existing research, there is a device to increase the absorption distance by adding spherical mirrors at both ends of the gas chamber to increase the number of reflections, but the volume of the gas chamber is still relatively large, and it is not convenient to calculate the absorption distance by adjusting the incident light angle

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