Spatial light reflection type gas pool used for detecting gas spectral absorption

Abstract

The invention relates to a spatial light reflection type gas pool used for detecting gas spectral absorption. The spatial light reflection type gas pool comprises a front sleeve, a rear sleeve, an gas inlet nozzle and an gas outlet nozzle, wherein the gas inlet nozzle and the gas outlet nozzle are arranged on the front sleeve and the rear sleeve respectively; the tail end of the front sleeve is connected with a sleeve head, a light emission assembly is arranged on the sleeve head, a temperature sensor is arranged on the sleeve head and used for temperature compensation, a photovoltaic conversion pre-amplification electric circuit is put on the sleeve head, and a light receiving element is arranged on the photovoltaic conversion pre-amplification circuit; a cube-corner prism and a prism pressing ring are arranged at the tail end of the rear sleeve, the cube-corner prism is used for reflecting laser so that the absorption optical path of gas can be double increased, and the detection sensitivity of a gas measurement system can be improved. The light emission assembly of the gas pool is easy to adjust, the output laser is small in light spot and high in collimation, and the gas pool is high in stability and can be applied to an optical gas detecting devices and instruments.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a space light reflective gas cell for gas spectral absorption detection, in particular to a gas cell with tunable diode laser absorption spectrum (TDLAS) gas detection technology. Background technique [0002] With the continuous development of science and technology, more and more gas detection is involved in the fields of industry, mine, environment, transportation, aerospace, etc., especially the atmospheric environmental pollution, the production process of the chemical industry, and the special needs of aerospace. increasingly receiving widespread attention. [0003] Among many gas detection technologies, TDLAS gas detection technology has been widely used in environmental monitoring, chemical production pipelines, aerospace and other fields due to its excellent characteristics. [0004] At present, in TDLAS gas detection, the light source of the gas cell mostly uses ...

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Problems solved by technology

[0004] At present, in TDLAS gas detection, the light source of the gas cell mostly uses a laser with optical fiber output. This kind of laser increases the coupling process of spatial light to the optical fiber, which causes the loss of optical power, reduces the efficiency of gas detection, and increases the cost; and Some gas cells that use spatial light output do not adopt corresponding adjustment measures at the light emitting end, resulting in short gas absorption optical path and low detection sensitivity

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