CN201318984Y - Enhanced sulfur hexafluoride laser leakage detector - Google Patents
Enhanced sulfur hexafluoride laser leakage detector Download PDFInfo
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- CN201318984Y CN201318984Y CNU200820237826XU CN200820237826U CN201318984Y CN 201318984 Y CN201318984 Y CN 201318984Y CN U200820237826X U CNU200820237826X U CN U200820237826XU CN 200820237826 U CN200820237826 U CN 200820237826U CN 201318984 Y CN201318984 Y CN 201318984Y
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Abstract
The utility model discloses an enhanced sulfur hexafluoride laser leakage detector which comprises a power supply, a laser system and an infrared imaging and display system, wherein the power supply is respectively connected with the laser system and the infrared imaging and display system, the laser system comprises a laser and an improved optical system, the infrared imaging and display system comprises an infrared thermal imaging instrument, an infrared thermal imagery receiving system, a forward stage image processing unit, an image display unit, a last-stage image processing unit and an image video display and storage unit. The utility model can realize remote and non-contact accurate positioning to leakage points of sulfur hexafluoride of power-operated equipment, changes the divergent angle of laser beans when the detecting distance changes, realizes keeping tri-dimensional infrared radiation field constant on detecting positions, improves the definition of leaking points indicated by the image display unit, improves detecting sensibility and accuracy of leaking points, increases image signals of leaked gas, and improves image contrast.
Description
Technical field
The utility model relates to the laser detector in a kind of electric power safety checkout equipment field, in a kind of specifically high voltage electric equipment is the enhancement mode sulfur hexafluoride laser leak locator of the sulfur hexafluoride gas leak source detection and localization of the high pressure combined electrical apparatus switch of medium and isolating switch with the sulfur hexafluoride gas.
Background technology
The molecule of sulfur hexafluoride gas has symmetrical structure, chemical property is highly stable, and the reactance voltage breakdown performance is all better than other any gas, so sulfur hexafluoride gas is a kind of optimal insulating gas that is applied to substation equipment.For the isolating switch in being full of the sulfur hexafluoride gas container, when this contact separation, when cutting off circuit, the electric arc of generation raises the temperature of contact ambient gas, and punctures the sulfur hexafluoride molecule.Because sulfur hexafluoride gas has good performance of heat dissipation, nearly all breakdown sulfur hexafluoride molecule can be reduced to ortho states rapidly, so when arc discharge finished, sulfur hexafluoride gas just can revert to steady state (SS) rapidly.For high voltage electric equipment, this good insulation characterisitic is very favorable.Because sulfur hexafluoride gas has these advantages, sulfur hexafluoride current mutual inductor and voltage transformer (VT) have also obtained to apply faster.Though it is little, reliable and stable to be filled with the electrical equipment volume of sulfur hexafluoride gas, its leakage is a breakneck problem.Under the normal condition, the concentration of moisture is tens times of moisture concentration in the sulfur hexafluoride air cell in the atmosphere, and huge inside and outside concentration difference makes moisture be penetrated in the sulfur hexafluoride air cell by equipment leakage, causes that moisture concentration significantly raises in the sulfur hexafluoride air cell.Pure sulfur hexafluoride gas is nontoxic, and good chemical stability and thermotolerance are arranged.Its under 15 ℃ not with water, acid, alkali, transformer oil, metal and insulating material effect; Do not decomposing below 500 ℃, after 600 ℃, will produce thermal decomposition.So, sulfur hexafluoride gas will be decomposed into sulphur, fluorine atom or subfluoride under high temperature (greater than the 4000K) effect of electric arc, but recombination is a sulfur hexafluoride after the blow-out, but small part of gas can with the hydrone and the oxygen molecule effect on electric arc metal vapors, electrode or insulating material surface, and generation subfluoride and metal fluoride and sulfuretted hydrogen etc., these toxic gases are discharged into space outerpace by leakage point, under finite concentration with the entail dangers to personal security.The sulfur hexafluoride gas of high inertia also is one of main gas that causes greenhouse effect in addition, and leaking in the atmosphere has bigger harm to environment.So detect sulfur hexafluoride gas whether leaks be ensure electrical equipment normally, the important means of trouble free service and environmental protection etc.The sulfur hexafluoride gas of traditional detection power equipment leaks a lot of methods, as: methods such as soap water leakage detection, wrapping leakage detection, hand-held leak locator leak detection, but working strength is big on the one hand for these methods, can't realize charged detection on the other hand.So seek a kind of method efficient, real-time charged detection is necessary and urgent.
Sulfur hexafluoride gas leaks the laser detection infrared imaging system and has utilized the strong characteristics that absorb infrared light in a certain wavelength coverage of sulfur hexafluoride, in infrared radiation field, absorb according to gas leakage infrared light and background institute's scattering or reflection the formed light and shade brightness of infrared light to the position of detected gas leakage point recently, and can qualitatively judge the size of leakage rate.This system has higher detection sensitivity and remote detectability, also can carry out efficient detection when the power equipment charging operation.But there is following deficiency in present sulfur hexafluoride laser leak locator on properties of product and Practical Performance: 1, detection sensitivity is lower; 2, picture contrast is not high enough, can't accurately locate the leak source position; 3, detect under the variable in distance situation, laser optical system does not possess apart from adaptability to changes.
Summary of the invention
Goal of the invention: the purpose of this utility model is to overcome the deficiencies in the prior art, this a kind of detection sensitivity and degree of accuracy height are provided, can accurately locate the leak source position, and detect under the variable in distance situation, laser system possesses the enhancement mode sulfur hexafluoride laser leak locator apart from adaptability to changes.
Technical scheme: a kind of enhancement mode sulfur hexafluoride laser leak locator, it comprises power supply, Optical Maser System, infrared imaging and display system, power supply is connected with display system with Optical Maser System, infrared imaging respectively, Optical Maser System comprises laser instrument and modified optical system, power supply is connected with the input end of laser instrument, and laser output is connected with modified optical system input end; Infrared imaging and display system comprise thermal infrared imager, the infrared thermal imagery receiving system, the prime graphics processing unit, image-display units, back level graphics processing unit and image, video shows and storage unit, power supply is connected with thermal infrared imager, the output terminal of infrared thermal imagery receiving system is connected with the input end of thermal infrared imager, the output terminal of thermal infrared imager is connected with the input end of prime graphics processing unit, the output terminal of prime graphics processing unit is connected with the input end of image-display units, the output terminal of image-display units is connected with the input end of back level graphics processing unit, the output terminal and the image of back level graphics processing unit, video shows and is connected with the input end of storage unit.
Wherein, laser instrument is the carbon dioxide laser of stable output wavelength.
Wherein, described laser instrument output infrared ray is 10.55 microns a single wavelength.
Wherein, described modified optical system is the laser beam regulating device, comprises anchor lens, active convex lens and compensation concavees lens, and wherein the anchor lens are in the middle of active convex lens and compensation concace mirror lens.
Wherein, described infrared thermal imagery receiving system is the narrow-band-filter camera lens.
Wherein, described prime graphics processing unit comprises two-way video signal collecting card and vision signal differential processor for picture signal is divided into the video signal collective disposal system that two-way carries out difference processing.
Wherein, described back level graphics processing unit is gradation of image, brightness regulating apparatus, and picture signal is further handled.
Wherein, described image, video demonstration are image display and USB interface storage with storage unit.
The utility model utilizes the strong characteristic that absorbs the infrared light of a certain wavelength coverage of sulfur hexafluoride gas to detect the leakage situation of sulfur hexafluoride gas.When utilizing the relevant sulfur hexafluoride insulator arrangement of laser radiation, if leaking appears in equipment, then the detection infrared laser of specific wavelength is by the gas absorption at leakage point place, and the background of not having the gas leakage then will be radiated its lip-deep infrared laser scattering or reflex to infrared imaging equipment.Like this, infrared imaging equipment will receive the image that a light and shade contrast there are differences, and demonstrate the position that sulfur hexafluoride gas leaks image and corresponding leakage point by Flame Image Process and display system then.Concrete work engineering can be described as: power-on control carbon dioxide laser penetrates infrared laser beam, and laser beam is detecting the infrared radiation field that the surface forms a certain size by the modified optical system, and its big I is adjusted according to detecting distance; Open infrared imaging equipment, if exist sulfur hexafluoride gas to leak in the infrared radiation field, to receive the image that a light and shade contrast there are differences, demonstrate the position that sulfur hexafluoride gas leaks image and corresponding leakage point by Flame Image Process and display system then.Further, by the picture contrast analysis shown, can qualitatively judge the size of leakage rate to infreared imaging device.
Beneficial effect: (1) adopts gas infrared absorption and infrared imagery technique, can accurately locate leakage point of sulphur hexafluoride remote (0-15 rice), the noncontact of operation power equipment.(2) adopt the modified optical system, realize that laser system possesses apart from adaptability to changes, under the situation that detects variable in distance, change the dispersion angle of laser beam, be implemented in the three-dimensional infrared radiation field that inspection positions keeps constant magnitude, improve the sharpness of leak source position shown in the image-display units.(3) utilize the infrared receiving system that mates with sulfur hexafluoride absorption maximum infrared light wavelength, be subjected to external environment influence little during detection, improve the detection sensitivity and the precision of leak source.(4) according to prime graphics processing unit and back level graphics processing unit two steps image processing function, strengthen the picture signal that gas leaks, improve picture contrast, thereby improved the detection sensitivity that sulfur hexafluoride leaks, and the accuracy of detection of leak source position.
Description of drawings
Be illustrated as structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explanation.
As shown in the figure; the utility model comprises power supply 1, Optical Maser System, infrared imaging and display system; power supply 1 is connected with display system with Optical Maser System, infrared imaging respectively; power supply 1 control respectively Optical Maser System and infrared imaging and display system unlatching, close, and equipment is protected.Power-supply system is 220V alternating current or 48V direct current, is entire equipment operation power supply.
Optical Maser System comprises laser instrument 2 and modified optical system 3, and power supply 1 is connected with laser instrument 2, and laser instrument 2 is connected with modified optical system 3.Laser instrument 2 is the carbon dioxide laser of stable output wavelength, and described laser instrument 2 output infrared rays are 10.55 microns single wavelength.Described modified optical system 3 is the laser beam regulating device, comprises anchor lens, active convex lens and compensation concavees lens, and wherein the anchor lens are in the middle of active convex lens and compensation concace mirror lens.Modified optical system 3 is radiated at the infrared laser beam of the specific wavelength that laser instrument penetrates on the object to be detected, realizes the three-dimensional infrared radiation field with suitable radiation scope.
Infrared imaging and display system comprise thermal infrared imager 4, infrared thermal imagery receiving system 5, prime graphics processing unit 6, image-display units 7, back level graphics processing unit 8 and image, video shows and storage unit 9, power supply 1 is connected with thermal infrared imager 4, the output terminal of infrared thermal imagery receiving system 5 is connected with the input end of thermal infrared imager 4, the output terminal of thermal infrared imager 4 is connected with the input end of prime graphics processing unit 6, the output terminal of prime graphics processing unit 6 is connected with the input end of image-display units 7, the output terminal of image-display units 7 is connected with the input end of back level graphics processing unit 8, the output terminal and the image of back level graphics processing unit 8, video shows and is connected with the input end of storage unit 9.
It is the narrow-band-filter camera lens that described infrared thermal imagery receives 5 systems, and the wavelength that sees through narrow-band-filter camera lens center is 10.55 microns a infrared wavelength.Prime graphics processing unit 6 comprises the two-way video signal collecting card for picture signal is divided into the video signal collective disposal system that two-way carries out difference processing, the vision signal differential processor.Thermal infrared imager 4 scan images are input to the two-way video signal collecting card, utilize the vision signal differential processor will be wherein one tunnel signal storage as the reference signal, another road vision signal and storage signal difference, differential signal outputs to image-display units 7, reduce the influence of ground unrest to sulfur hexafluoride gas leak dynamic image, improve the resolution that sulfur hexafluoride gas leaks, eliminate the influence of ground unrest detection signal.Back level graphics processing unit 8 is gradation of image, brightness regulating apparatus, and picture signal is further handled.Described image, video show and storage unit 9 is image display and USB interface storer.
The infrared thermal imagery receiving system receive object to be detected surface scattering or reflection infrared signal, the infrared signal that receives passes to thermal infrared imager 4,4 pairs of signals of thermal infrared imager scan, and 4 pairs of signals of thermal infrared imager carry out exporting to prime graphics processing unit 6 after the imaging processing then.Image outputs to image-display units 7 after contrasting enhancement process, having image on image-display units 7 shows, image-display units 7 is exported to back level graphics processing unit 8 with signal and is further carried out Flame Image Process, improving the signal to noise ratio (S/N ratio) of image, and then find out the position of equipment leakage point and the size of qualitative judgement leakage rate clearly on the image after handle.After finishing, Image Information Processing enters image, video demonstration and storage unit 9.
The utility model provides a kind of thinking and method of enhancement mode sulfur hexafluoride laser detector; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.The all available prior art of each component part not clear and definite in the present embodiment is realized.
Claims (8)
1, a kind of enhancement mode sulfur hexafluoride laser leak locator, it is characterized in that: it comprises power supply (1), Optical Maser System, infrared imaging and display system, power supply (1) is connected with display system with Optical Maser System, infrared imaging respectively, Optical Maser System comprises laser instrument (2) and modified optical system (3), power supply (1) is connected with the input end of laser instrument (2), and laser instrument (2) output terminal is connected with modified optical system (3) input end; Infrared imaging and display system comprise thermal infrared imager (4), infrared thermal imagery receiving system (5), prime graphics processing unit (6), image-display units (7), back level graphics processing unit (8) and image, video shows and storage unit (9), power supply (1) is connected with thermal infrared imager (4), the output terminal of infrared thermal imagery receiving system (5) is connected with the input end of thermal infrared imager (4), the output terminal of thermal infrared imager (4) is connected with the input end of prime graphics processing unit (6), the output terminal of prime graphics processing unit (6) is connected with the input end of image-display units (7), the output terminal of image-display units (7) is connected with the input end of back level graphics processing unit (8), the output terminal and the image of back level graphics processing unit (8), video shows and is connected with the input end of storage unit (9).
2, enhancement mode sulfur hexafluoride laser leak locator according to claim 1, it is characterized in that: laser instrument (2) is the carbon dioxide laser of stable output wavelength.
3, enhancement mode sulfur hexafluoride laser leak locator according to claim 1 and 2 is characterized in that: described laser instrument (2) output infrared ray is 10.55 microns a single wavelength.
4, enhancement mode sulfur hexafluoride laser leak locator according to claim 1, it is characterized in that: described modified optical system (3) is the laser beam regulating device, comprise anchor lens, active convex lens and compensation concavees lens, wherein the anchor lens are arranged in the middle of active convex lens and the compensation concace mirror lens.
5, enhancement mode sulfur hexafluoride laser leak locator according to claim 1 is characterized in that: described infrared thermal imagery receiving system (5) is the narrow-band-filter camera lens.
6, enhancement mode sulfur hexafluoride laser leak locator according to claim 1, it is characterized in that: described prime graphics processing unit (6) comprises two-way video signal collecting card and vision signal differential processor for picture signal is divided into the video signal collective disposal system that two-way carries out difference processing.
7, enhancement mode sulfur hexafluoride laser leak locator according to claim 1 is characterized in that: described back level graphics processing unit (8) is gradation of image, brightness regulating apparatus.
8, enhancement mode sulfur hexafluoride laser leak locator according to claim 1 is characterized in that: described image, video show and storage unit (9) is image display and USB interface storer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820237826XU CN201318984Y (en) | 2008-12-18 | 2008-12-18 | Enhanced sulfur hexafluoride laser leakage detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820237826XU CN201318984Y (en) | 2008-12-18 | 2008-12-18 | Enhanced sulfur hexafluoride laser leakage detector |
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| CN201318984Y true CN201318984Y (en) | 2009-09-30 |
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| CNU200820237826XU Expired - Lifetime CN201318984Y (en) | 2008-12-18 | 2008-12-18 | Enhanced sulfur hexafluoride laser leakage detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234953A (en) * | 2013-04-16 | 2013-08-07 | 南京诺威尔光电系统有限公司 | Laser scanning thermal wave tomography system and method |
| CN104458577A (en) * | 2014-12-02 | 2015-03-25 | 中国科学院半导体研究所 | Thermal infrared imager based gas remote detecting device |
| CN107830974A (en) * | 2017-10-23 | 2018-03-23 | 广东电网有限责任公司东莞供电局 | One kind is based on infrared thermal imagery power equipment SF6 leakage online test methods |
-
2008
- 2008-12-18 CN CNU200820237826XU patent/CN201318984Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234953A (en) * | 2013-04-16 | 2013-08-07 | 南京诺威尔光电系统有限公司 | Laser scanning thermal wave tomography system and method |
| CN103234953B (en) * | 2013-04-16 | 2015-03-11 | 南京诺威尔光电系统有限公司 | Laser scanning thermal wave tomography system and method |
| CN104458577A (en) * | 2014-12-02 | 2015-03-25 | 中国科学院半导体研究所 | Thermal infrared imager based gas remote detecting device |
| CN107830974A (en) * | 2017-10-23 | 2018-03-23 | 广东电网有限责任公司东莞供电局 | One kind is based on infrared thermal imagery power equipment SF6 leakage online test methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Longqian Inventor after: Zhao Yunlong Inventor after: Si Weidong Inventor after: Zhang Jilin Inventor after: Li Tao Inventor after: Ben Xiangdong Inventor after: Deng Guolong Inventor after: Wang Binlin Inventor after: Zhang Genghe Inventor after: Liu Zhanshuang Inventor after: Shi Haiyong Inventor after: Huo Shuxia Inventor before: Liu Guimei Inventor before: Zhang Hui Inventor before: Zhang Shuyi Inventor before: Lie Jianping |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170123 Address after: No. 131 of Qinghai province total 810001 Zhai Zhen Xining City District South City Road Patentee after: MAINTENANCE COMPANY, STATE GRID QINGHAI ELECTRIC POWER CO., LTD. Address before: Baixia Road, Baixia District of Nanjing city in Jiangsu province 210001 No. 362 unit 1801 yuan 1 Evans Patentee before: NANJING ZHUOSHI ELECTRIC CO., LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090930 |