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a kind of sf 6 Fractional Laser Induced Breakdown Spectroscopy Detection Method of Gas Leakage

A technology of gas leakage and fractional laser, which is applied in the direction of detecting the appearance of fluid at the leakage point, using liquid/vacuum degree for liquid tightness measurement, material excitation analysis, etc., can solve the problems that cannot be monitored in real time online, and achieve coverage Wide range, saving analysis time, and improving real-time effects

Active Publication Date: 2017-01-04
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, a large number of handheld SF 6 Gas detection equipment, based on gas sensors, must be used next to power equipment, for distance equipment such as SF 6 Insulated Transmission Lines, SF 6 Transformers, etc., cannot be monitored online in real time

Method used

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  • a kind of sf <sub>6</sub> Fractional Laser Induced Breakdown Spectroscopy Detection Method of Gas Leakage
  • a kind of sf <sub>6</sub> Fractional Laser Induced Breakdown Spectroscopy Detection Method of Gas Leakage

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Embodiment Construction

[0022] The specific embodiment of the present invention is as figure 1 and 2 shown.

[0023] SF to be monitored 6 Electric equipment 9 contains SF 6 (sulfur hexafluoride) gas, which plays the role of insulation and arc extinguishing. When SF 6 When electrical equipment 9 is normal, there is no SF 6 gas leak; when SF 6 Power Equipment 9 in SF 6 There are sand holes, cracks or gasket aging in the gas chamber tank and welds, which lead to SF 6 When the gas 7 leaks out, there will be a certain concentration of SF in the monitoring area 8 6 gas.

[0024] This embodiment is carried out like this:

[0025] SF 6 The fractional laser-induced breakdown spectroscopy detection system for gas leakage consists of a host computer 18, a high-energy pulse laser 1, a beam expander 3, a focusing lens array 5, a beam splitter 6, a photodetector array 10, a drive amplification output circuit 11, and an AOTF Filter 12, AOTF drive controller 13, and lens 19 are composed. The focusing le...

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Abstract

A fractional laser-induced plasma (LIBS) spectral detection method for SF6 gas leakage, the system used in the method consists of an embedded system host (18), a high-energy pulse laser (1), a beam expander (3), and a focusing lens Array (5), beam splitter (6), photodetector array (10), drive amplification output circuit (11), acousto-optic tunable filter (12), AOTF drive controller (13), lens (19) composition. The invention adopts lattice LIBS technology to analyze the LIBS signals of sulfur and fluorine elements in real time at multiple points in the monitoring area, and then judge whether there is SF6 gas leakage and the approximate concentration distribution of SF6 gas leakage. The invention adopts lattice LIBS measurement, which is more efficient than single-point measurement; LIBS spectrum analysis adopts AOTF to select two wavelengths, without the need of conventional spectrometer for light separation and spectrum analysis, which saves analysis time and improves real-time performance. In addition to judging whether there is SF6 gas leakage, it can also analyze the approximate concentration distribution of SF6 gas leakage.

Description

technical field [0001] The invention relates to a power equipment SF 6 The invention discloses a lattice laser-induced breakdown spectroscopy (Laser-induced breakdown spectroscopy, LIBS for short) monitoring method for (sulfur hexafluoride) gas leakage, which belongs to the technical field of laser spectrum measurement. Background technique [0002] SF 6 Gas (sulfur hexafluoride gas) has a history of one hundred years. It is an artificial inert gas synthesized in 1900 by two French chemists, Moissan and Lebeau. SF 6 The gas was first used in the military field, and later began to be used commercially. Current SF 6 The gas is mainly used in the electric power industry, and mainly plays the role of insulation and / or arc extinguishing in high-voltage electrical equipment. Common use of SF 6 Gas power equipment includes: SF 6 Circuit breakers and GIS (here refers to sulfur hexafluoride closed combination electrical appliances, known internationally as "Gas Insulated Switc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/04G01N21/63
Inventor 万雄
Owner STATE GRID CORP OF CHINA
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