Optical path adjustable coal mine goaf complex mixed gas spectrum detection device and method

By using an optically adjustable spectral detection device for complex mixed gases in coal mine goaf areas, combined with optical path adjustment and a deep learning model, the problem that existing spectral detection devices cannot simultaneously detect high-concentration background gases and trace amounts of hazardous gases has been solved, achieving high-precision and rapid detection of coal mine goaf areas.

CN122814519APending Publication Date: 2026-09-25CCTEG CHINA COAL RES INST
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Patent Information

Application Number
CN202610746513.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-27
Publication Date
2026-09-25

AI Technical Summary

Technical Problem

Existing gas detection devices for coal mine goaf areas suffer from fixed optical path lengths and lack of fine adjustment, resulting in saturated spectra for high-concentration gases and insufficient sensitivity for trace gases. They cannot simultaneously meet the detection requirements for high-concentration background gases and trace hazardous gases. Furthermore, severe cross-interference of multi-component spectra makes it difficult to achieve high-precision detection of complex mixed gases.

Method used

An optically adjustable spectroscopic detection device for complex mixed gases in coal mine goaf areas is adopted, which includes an infrared light source module, a fixed optical gas chamber, a movable detector module along the optical path, a multi-degree-of-freedom drive mechanism, and a data acquisition and calculation unit. High-precision detection is achieved through optical path adjustment and deep learning models.

Benefits of technology

It enables simultaneous detection of high-concentration background gases and trace amounts of hazardous gases, and is suitable for in-situ rapid and high-precision detection in the confined spaces of coal mine goafs, effectively eliminating cross-interference of multi-component spectra.

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Abstract

The application provides a coal mine goaf complex mixed gas spectrum detection device and method with adjustable optical path, and the device comprises an infrared light source module, an optical path fixed optical gas chamber, a movable detector module along the optical path, a multi-degree-of-freedom driving mechanism and a data acquisition and calculation unit. The positions and angles of all mirrors in the optical gas chamber are completely fixed and do not participate in the optical path adjustment. The detector is driven to move along the linear track in the gas chamber by the multi-degree-of-freedom driving mechanism, so that the optical path is continuously and finely adjustable. The data acquisition and calculation unit collects spectral data under different optical paths, constructs a three-dimensional spectrum with absorbance, wave number and optical path as three coordinates, and outputs the gas component and concentration detection results in combination with a deep learning model. The technical scheme provided by the application has high optical path stability, can simultaneously meet the detection requirements of high-concentration background gas and trace hazardous gas, and is suitable for in-situ, rapid and high-precision detection in a narrow space of a coal mine goaf.
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