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Gas component detection method and device based on ultraviolet spectroscopy

A gas component and ultraviolet spectrum technology, applied in the direction of color/spectral characteristic measurement, can solve the problems of detection interference, increased detection workload, and reduced detection accuracy of infrared light, so as to improve detection efficiency, small absorption spectrum overlap, The effect of high detection accuracy

Inactive Publication Date: 2016-10-12
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it uses a narrow linewidth tunable laser. When detecting different characteristic components, different light sources need to be set, which increases the workload of detection and is not conducive to the on-site detection of SF. 6 Rapid detection of characteristic decomposition components. At the same time, the absorption peaks of each characteristic decomposition component overlap under infrared light, which interferes with the detection and greatly reduces the detection accuracy of infrared light.

Method used

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  • Gas component detection method and device based on ultraviolet spectroscopy
  • Gas component detection method and device based on ultraviolet spectroscopy
  • Gas component detection method and device based on ultraviolet spectroscopy

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Embodiment 1

[0050] Embodiment 1 of the present invention provides a gas component detection device based on ultraviolet spectroscopy, as attached figure 1 Shown is a schematic structural diagram of a gas component detection device based on ultraviolet spectroscopy disclosed in Embodiment 1 of the present invention. The device includes: an ultraviolet light source 1, a gas absorption cell 2, a spectrometer 3 and a data processing device 4;

[0051] The ultraviolet light source 1 is connected to the collimating mirror 5 arranged outside the entrance of the gas absorption cell 2, and is used to provide ultraviolet light required for detection;

[0052] The inside of the entrance of the gas absorption cell 2 is provided with a first concave reflector, the inside of the outlet of the gas absorption cell 2 is provided with a second concave reflector, and the outside of the exit of the gas absorption cell 2 is provided with a focusing mirror 6 ;

[0053] The first concave reflector and the seco...

Embodiment 2

[0063] A gas component detection device based on ultraviolet spectroscopy provided based on the first embodiment of the present invention, as attached figure 2 Another schematic structural view of a gas component detection device based on ultraviolet spectroscopy provided in Embodiment 2 of the present invention is shown, wherein the gas absorption cell 2 includes:

[0064] Housing 20, air inlet 21, air outlet 22, first control valve 23, second control valve 24, vacuum pump 25, pressure gauge 26, temperature gauge 27, first concave reflector 28 and at least two second concave reflectors mirror 29;

[0065] One end outside the inlet of the housing 20 is connected to the collimating mirror 5, and one end outside the outlet of the housing 20 is connected to the focusing mirror 6, and the housing 20 is used to store the gas to be measured;

[0066] The air inlet 21 is arranged on the housing 20 and is connected to the first control valve 23 for injecting the gas to be measured; ...

Embodiment 3

[0083] A gas component detection device based on ultraviolet spectroscopy provided based on the first and second embodiments of the present invention, such as Figure 4The schematic diagram of the structure of the ultraviolet light source in a gas component detection device based on ultraviolet spectroscopy provided by the third embodiment of the present invention is shown. The ultraviolet light source 1 includes: a deuterium lamp 11, and a deuterium lamp connected to the deuterium lamp 11 Deuterium lamp temperature controller 12;

[0084] The deuterium lamp 11 is connected to the input end of the collimating mirror 5 through an optical fiber, and is used to provide ultraviolet light required for detecting the gas to be measured;

[0085] The deuterium lamp temperature controller 12 is used to control the temperature when the deuterium lamp 11 emits ultraviolet light.

[0086] It can be concluded from the above-mentioned gas component detection device based on ultraviolet spe...

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Abstract

The invention discloses a gas component detection method and device based on ultraviolet spectroscopy. According to the device, an ultraviolet light source is connected with a collimating lens arranged on the outer side of an inlet of a gas absorption cell to provide ultraviolet light during detection; a first concave reflecting mirror arranged on the inner side of the inlet of the gas absorption cell and a second concave reflecting mirror arranged on the inner side of an outlet of the gas absorption cell sequentially reflect collimated ultraviolet light until the ultraviolet light is reflected to a focusing lens; the reflection light reflected sequentially passes by to-be-detected gas injected in advance; a spectrometer performs spectrum analysis on focused reflection light and sends obtained absorption spectra to a data processing device; the data processing device performs comparison and analysis according to the wavelength and power value of input ultraviolet light, gas pressure and temperature of the to-be-detected gas as well as standard diagrams of absorption spectra and prestored gas ultraviolet light absorption spectra and obtains and displays components and content of the to-be-detected gas, and accordingly, the detection efficiency and accuracy of SF6 decomposition components are improved.

Description

technical field [0001] The invention relates to the technical field of charged detection of gas components in insulating equipment, and more specifically, to a method and device for detecting gas components based on ultraviolet spectroscopy. Background technique [0002] Sulfur hexafluoride (SF 6 ) Ring main unit is widely used in power distribution network. In recent years, ring network cabinets have experienced frequent failures and often release toxic gases. Because ring network cabinets may have burrs during manufacturing, loose parts or poor contact during installation and transportation, these conditions will cause electrode potential floating, local overheating, insulation aging during operation, and metal particles, which will cause early insulation defects, resulting in Different degrees of partial discharge (Partial Discharge, referred to as PD), generate sulfuryl difluoride (SO 2 f 2 ), thionyl fluoride (SOF 2 ), hydrogen sulfide (H 2 S), carbon disulfide (C...

Claims

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Application Information

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IPC IPC(8): G01N21/33
CPCG01N21/33
Inventor 黄杨珏徐晓刚李鑫汪进锋陈晓科黄嘉健李兰芳曾杰谢宁张弛董星辰
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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