Open long-path broad-spectrum gas measurement system

A gas measurement and long optical path technology, applied in the field of wide-spectrum gas measurement systems, can solve the problems of inability to monitor multiple gas components and concentrations at the same time, and poor temporal and spatial representation of point measuring instruments, so as to simplify the instrument adjustment and alignment process , with spatio-temporal representation, to avoid the effect of occlusion

Inactive Publication Date: 2011-02-23
HEBEI UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing open long optical path measurement system or point measuring instrument cannot monitor the composition and concentration of multiple gases at the same time, and the point measuring instrument has poor temporal and spatial representation, and provides an open long optical path measuring instrument. long-range wide-spectrum gas measurement system

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  • Open long-path broad-spectrum gas measurement system
  • Open long-path broad-spectrum gas measurement system

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Embodiment Construction

[0012] figure 1 Shown is an open long optical path wide-spectrum gas measurement system provided by the present invention, which includes a point light source (xenon lamp) 1 that can emit a wide-spectrum structure, a tunable laser light source 2 (or other types of light source), Telescope and spectrometer (not pictured). Wherein the telescope includes: a spherical reflector 6, and a corner cube prism 7 at the other end of the optical path of the telescope. In addition, the system also includes a transceiver-integrated optical fiber bundle structure, which is composed of transmitting optical fibers 10, 11 (there are two groups of transmitting optical fibers in this example, or more) and receiving optical fibers 12, 13, one end of which is fixed together to form The common end 5 of the sending and receiving optical fiber is located on the optical axis of the telescope. Assuming that the radius of the spherical reflector 6 is R, the distance between the common end of the multi-b...

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Abstract

The invention provides an open long-path broad-spectrum gas measurement system, which solves the problems of narrow measurement spectrum range and a few measurable gas components of the conventional open long-path broad-spectrum gas measurement system. The measurement system comprises a plurality of light sources, a multiple transceiving fiber bundle structure, a telescope and a spectrometer, wherein the light sources can be light sources capable of transmitting continuous spectrums and tunable laser, and are respectively coupled to independent transmission fiber incident ends; and the light is emitted through the public ends of the transmission fibers, is collimated through a spherical mirror in the telescope, is reflected in the original direction after the light reaches a cube-corner retroreflector on the other end of the long path of the telescope, enters the public ends of the transceiving fibers through focusing of the spherical mirror, is emitted through the independent receiving fiber exit ends, and is subjected to spectrum detection by the spectrometer. The system only requires one concave mirror inside the telescope, has a simple structure and high spectrum utilization efficiency, and can complete absorption spectrum measurement of various gases from an ultraviolet waveband to an infrared waveband.

Description

【Technical field】: [0001] The invention relates to an open long optical path wide-spectrum gas measurement system, especially a monitoring system for measuring trace gas in air. 【Background technique】: [0002] In the monitoring of gases in air pollution, point instruments can be used to sample and analyze different gases, but this method can only understand the air pollution situation in the sampling space of the monitoring point and the average condition within the sampling period, and the representativeness of time and space Poor, and a point monitoring instrument generally can only monitor one gas. The gas absorption spectroscopy measurement technology using the open long optical path method is becoming an ideal tool for environmental pollution monitoring due to its large-scale, multi-component detection, and continuous real-time online measurement methods. The open long optical path technology can monitor several pollutants in the same spectral absorption band at the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/35G01N21/33G01N21/3504
Inventor 魏永杰陈文亮杜振辉徐可欣
Owner HEBEI UNIV OF TECH
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