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Gas composition telemetering method based on tunable mid-infrared laser

A technology of infrared laser and gas composition, which is used in the measurement of color/spectral properties, material analysis by optical means, measurement devices, etc. Effects of tuning mid-infrared laser output

Inactive Publication Date: 2020-02-04
天津市三博科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for remotely measuring gas components based on a tunable mid-infrared laser to address the shortcomings of the existing laser with a small tuning range

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  • Gas composition telemetering method based on tunable mid-infrared laser

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Embodiment Construction

[0012] The device based on tunable mid-infrared laser remote measurement of gas composition mainly includes a gas detection part and a gas analysis and processing part. The gas detection part includes a laser 1, a telescope collimator 2, a corner mirror array 3, and a photodetector 4.

[0013] The gas analysis and processing part includes a main control circuit 5 , a photoelectric signal conversion device 6 , a computer software system 7 and a display 8 .

[0014] As shown in the figure, the tunable mid-infrared laser emitted by the laser 1 is collimated by the telescope 2 to expand the beam, and is emitted through the target area. On the refrigerated photodetector 4, the electric signal is amplified by frequency selection through the main control circuit 5 to improve the signal-to-noise ratio, and then through A / D conversion 6, and the computer 7 collects and records the mid-infrared absorption spectrum data of the open path. The self-developed differential calculation softwa...

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Abstract

The invention relates to the field of optical remote sensing measurement technologies, in particular to a gas composition telemetering method based on tunable mid-infrared laser. The method is implemented through the steps that the tunable mid-infrared laser transmitted by a laser device (1) is subjected to beam expansion by a telescope collimator (2) and is transmitted to penetrate through a target region, beams are reflected back in parallel by a backward reflector array (3) and are converged by a detection telescope onto a semiconductor-refrigerated photoelectric detector (4), an electric signal is subjected to frequency selection and amplification through a main control circuit (5) and then passes through an A / D converter (6) after the signal-to-noise ratio is increased, and a computer(7) collects and records mid-infrared absorption spectrum data in an open path. Through independently-developed difference calculation software, whether a target gas exists or not and a concentrationvalue are given, and the target gas existing condition and the concentration value are displayed through a displayer (8).

Description

【Technical field】 [0001] The invention relates to the technical field of optical remote sensing measurement, in particular to a method for remotely measuring gas components based on a tunable mid-infrared laser. 【Background technique】 [0002] At present, in the existing gas detection technology, there are many main methods for detecting gas components, but most of them are chemical methods. Liquid-liquid extraction or solid-liquid extraction and other pre-treatment processes are difficult to meet the needs of prevention and accidents, especially in the face of some toxic and harmful gases. The laser gas detector using absorption spectroscopy is a high-sensitivity, high-resolution And fast response gas detection technology, widely used in atmospheric detection and other fields. [0003] When using the absorption spectroscopy laser gas detector to detect the concentration of various gas components, it is hoped that the spectral absorption lines of multiple gas components can...

Claims

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Application Information

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IPC IPC(8): G01N21/3504G01N21/39
CPCG01N21/3504G01N21/39
Inventor 蔡兆文张帆王洪兴于永强
Owner 天津市三博科技有限公司
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