CN201600230U - Laser leak detection device for detecting sulfur hexafluoride - Google Patents
Laser leak detection device for detecting sulfur hexafluoride Download PDFInfo
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- CN201600230U CN201600230U CN2009202142567U CN200920214256U CN201600230U CN 201600230 U CN201600230 U CN 201600230U CN 2009202142567 U CN2009202142567 U CN 2009202142567U CN 200920214256 U CN200920214256 U CN 200920214256U CN 201600230 U CN201600230 U CN 201600230U
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- leakage detecting
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Abstract
The utility model provides a laser leak detection device for detecting sulfur hexafluoride. The device comprises a power supply unit, an infrared camera lens for receiving light source and imaging, a light filter, an imager and a data processing unit, wherein the light filter is placed in front of the infrared camera lens, and screens rays with equal bands in ambient sunlight; the imager is connected with the power supply unit and outputs formed detection images; and the data processing unit is connected with the imager, and accurately processes the detection images output from the imager, so as to output detection result images. Besides, the light source comprises sunlight and/or laser. By adopting the laser leak detection device provided by the utility model, the detection of the leakage points of the sulfur hexafluoride is free from the limit of sunlight condition, the positioning of the leakage points is rapid, and the detection precision is considerably improved; and the leakage points can be searched and maintained at any moment without stopping the detected equipment.
Description
Technical field
The utility model relates to a kind of detection sulfur hexafluoride (SF in the electric system power transmission and transformation field
6) the laser leakage detecting device; Especially in the electric system with SF
6Gas is the high voltage electric equipment of medium, comprises the power equipment in all types of generating plant, power transmission and transformation line, SF such as transformer station, transformer, isolating switch, GIS switch, underground transmission circuit
6Gas leaks leak source and detects and pinpoint a kind of detection SF
6The laser leakage detecting device.
Background technology
Sulfur hexafluoride (SF
6) electrical equipment at home and abroad obtained widely using, especially in electric system, application quantity has reached 95% of production, because SF
6Factors such as mass discrepancies such as electrical equipment manufacturing, installation and material aging, SF
6SF in the electrical equipment
6Gas often leaks and takes place.SF
6Gas leaks insulation and the arc extinguishing ability that has reduced electrical equipment, brings serious hidden danger for the safe operation of equipment, and its analyte produces big noxious material serious harm and the field personnel, has also aggravated greenhouse effect simultaneously.According to " GB-T8905-1996SF
6Gas delivery and detection guide rule in the electrical equipment " and " GB11023-89 high-tension switch gear SF
6Gas tightness test guide rule " etc. the requirement of industry rules, no matter be SF
6The preceding still later stage repair and maintenance of equipment installation and operation, leak test is the important content in the electric power maintenance work all the time, therefore, seeks a kind of can effectively the solution SF
6The means of electrical equipment gas Leak Detection are guaranteed the normal operation of equipment and Maintenance and Repair personnel's health of human body safety, become urgent problem.And traditional detection method (soap bubble method) is backward in technique because of it, and realizes that difficulty is complicated and eliminated by the staff, and the electric discharge that replaces detects (by the content of detection sulphuric dioxide, judges SF indirectly
6Whether reveal), accuracy is not high, and is affected by environment big and through the constant error alarm, serviceable life is short; The high pressure ionization method, accuracy of detection is higher, but only has 500 hours serviceable life and instability; The sonic detection method, detection sensitivity is on the low side, and the mistake alarm is many; The conductor sensor, accuracy of detection is lower, and instability is affected by environment big; Above method only is suitable for whether existing in the testing environment SF
6, and the size of definite concentration can't accurately be located the position of leakage point.
SF
6The laser leakage detecting device can accurately be located SF as unique
6The testing tool of electrical equipment leak source in power industry, has very broad application prospect.At present, domestic most producer is the external similar products of agency, and it is general to detect effect, and price is too high; The producer that only has one or two family can produce this equipment, but technically still have a more defective:
Under the irradiation of strong sunlight, can't normally carry out finding leak source work;
Can't obtain effect effect clearly by the infrared ray in the sunshine.
Simple eye formula observation causes user of service's eye fatigue easily;
Ripple-free suppresses the picture contrast treatment technology, has a lot of spuious ripples of making an uproar in the image that causes exporting, and has reduced the precision that detects;
Simple infrared technique can't be applicable to indoor or not have under the sunlight conditions SF
6Electrical equipment carries out leak source and detects.
Summary of the invention
For solving above all problems, the utility model provides a kind of laser leakage detecting device that detects sulfur hexafluoride, comprising:
Power supply unit; Receive the infrared lens of light source and imaging; Light filter, place described infrared lens after, and equal wave band light in the surrounding environment sunlight carried out shielding processing; Imager links to each other with described power supply unit and with the detected image output that forms; Data processing unit links to each other with described imager, and the detected image of imager output is accurately handled with output testing result image.
According to embodiment of the present utility model, above-mentioned light source comprises sunshine and/or laser.
In the above-described embodiments, described laser leakage detecting device also comprises: laser instrument links to each other with described power supply unit and by described power supply unit power supply; Beam expanding lens places described laser instrument front end, make laser that described laser instrument sends by and carry out the field of view angle adjustment; Infrared indicator links to each other with described power supply unit and by described power supply unit power supply, indicates laser beam position under the current state.
This data processing unit also comprises: the Digital Image Processing unit receives detected image and converts thereof into digital picture from described imager; The picture contrast processing unit receives digital picture from described digital processing element, digital picture degree of comparing is handled, to obtain the image of contrast resolution with the background grey scale change; The accurate positioning unit of leak source receives digital picture from described picture contrast processing unit, and accurately locatees sulfur hexafluoride leak source position with output testing result image according to the differentiation of different images imaging under equal background.
Preferably, described contrast is handled and is comprised: handle based on visual space resolution, temporal resolution, frequency resolution degree of comparing.
According to embodiment of the present utility model, described laser leakage detecting device also comprises: video recorder links to each other with described data processing unit, with storage testing result image; And/or the photoelectric video glasses, link to each other with described data processing unit, to show the testing result image.Described photoelectric video glasses are dismountable.
According to embodiment of the present utility model, described laser leakage detecting device also comprises: PAL that links to each other with described data processing unit or TSC-system formula normal video output interface.
Adopt sulfur hexafluoride (SF of the present utility model
6) the leak source pick-up unit, advantage is: make outdoor detection SF
6From then on leak source no longer is subjected to the influence of sunlight, all can obtain similar effect to watch 48 cun wide-screen films at 4.5 meters in any case, makes SF
6It is light, comfortable, happy that the finding leak source work of electrical equipment becomes; And solved simple infrared technique and be not suitable for the problem of using under the indoor or cloudy no sunshine situation, device still can obtain imaging effect clearly by the infrared ray in the sunshine under the situation of not opening laser; Shielding and weakened in the image of output and have a spuious ripple of making an uproar has significantly improved accuracy of detection, makes display effect just as clear as the digital camera; The leak source location rapidly, accurately; Using this device to carry out SF
6When the electrical equipment leak source detected, detected equipment need not to have a power failure, and can carry out SF at any time
6Finding leak source work, and according to lookup result orderly carry out overhaul of the equipments work.
And, detection SF of the present utility model
6The laser leakage detecting device be particularly suitable for especially in the electric system with SF
6Gas is the high voltage electric equipment of medium, comprises the power equipment in all types of generating plant, power transmission and transformation line, SF such as transformer station, transformer, isolating switch, GIS switch, underground transmission circuit
6Gas leaks leak source and detects and accurate location.Thereby guarantee the normal operation of equipment, the environmental pollution that Maintenance and Repair personnel's health of human body safety and avoiding causes because of equipment leakage.
Should be appreciated that the above generality of the utility model is described and the following detailed description all is exemplary and explanat, and be intended to provide further explanation for as claimed in claim the utility model.
Description of drawings
Comprise that accompanying drawing is for providing the utility model further to be understood, they are included and are constituted the application's a part, and accompanying drawing shows embodiment of the present utility model, and play the effect of explaining the utility model principle with this instructions.In the accompanying drawing:
Fig. 1 is the detection SF according to the utility model one embodiment
6The laser leakage detecting schematic diagram of device.
Fig. 2 is the electric wiring layout of product according to the utility model one embodiment.
Fig. 3 is a Flame Image Process flow process process flow diagram of the present utility model.
Fig. 4 is a main control circuit schematic diagram of the present utility model.
Embodiment
Now embodiment of the present utility model will be described with reference to the drawings in detail.
Adopt detection SF of the present utility model
6The laser leakage detecting device, generally speaking, SF
6Leak Detection can sky be a background, receives other light sources such as solar source and locate leak source than gross leak from infrared lens.Indoor or do not have under the situation of sunlight, to SF
6Electrical equipment can utilize laser to carry out leak source and detect.
As example, the following examples will be to open laser instrument, and receiving LASER Light Source is that example describes.
As shown in Figure 1, laser imaging SF of the present utility model
6The principle of work of leakage positioning device is: laser instrument 2 emitted laser are passed through beam expanding lens 3 after the control of light adjusting controller (not shown), and directive SF
6Electrical equipment 4, this moment, laser can be by SF
6The SF that leaks out in the electrical equipment 4
6Gas absorbs, and does not have SF
6The position of leaking will not absorb, by receiving and imaging by infrared lens after reflection, diffraction or the backscattering, enter light filter 5 subsequently, light filter 5 at first carries out equal wave band light in the surrounding environment sunlight to obtain preliminary image information after the shielding processing in imager 6, and preliminary image information is accurately located at Digital Image Processing, picture contrast processing and leak source through data processing unit 7.As example, image information after treatment can feed back in photoelectric video glasses 8, also can simultaneously the image information of exporting directly be stored in the video recorder 9 by the normal video interface, the associated video in storage and the video recorder 9 can be connected on the computing machine 10 by the user, observes.Those skilled in the art will appreciate that can replace the photoelectric video glasses in the present embodiment in other any display devices or the memory device and video recorder shows and stores processor after image information so as observation and the storage.
As shown in Figure 2, SF
6The laser leakage detecting device comprises power supply 1, ups power 11, laser instrument 2, imager 6, data processing unit 7, normal video output interface 15, photoelectric video glasses 8 and video recorder 9, and wherein processing unit 7 is made up of Digital Image Processing unit 12, picture contrast processing unit 13, accurate positioning unit 14 3 parts of leak source.The accurate positioning unit 14 of leak source is caught leak source by the image information of Digital Image Processing unit 12 and 13 outputs of picture contrast processing unit.As example, the leak source image amplification that captures can be outputed in photoelectric video glasses 8 and/or the video recorder 9, so that the user locatees SF
6The exact position of electrical equipment leak source and judgement SF
6The order of severity that electrical equipment leaks.
More specifically, power supply 1 or UPS11 are connected to the laser instrument 2 and the infrared indicator (not shown) of device by electric power connection line.For the ease of user's field work, this power supply is generally accumulator.Imager 6 links to each other with laser instrument 2, and the image information that collects outputs to result in photoelectric video glasses 8 and/or the video recorder 9 through after the processing of processing unit 7, thereby the electric part of having realized whole device connects.The SF that this device can not observe naked eyes under the common state
6Gas leaks, by adjusting spatial resolution.Temporal resolution, frequency resolution reach the video image that naked eyes can clear observation, the video image that the user of service observes by the photoelectric video glasses is equivalent to 48 cun digital television and places 4.5 meters, human eye the place ahead, and it is comfortable, happy that the user is placed oneself in the midst of in testing process as the cinema seemingly.Can selection standard PAL or TSC-system formula video output interface, will detect video image and directly be stored in the video recorder, be convenient to that the user checks and the management of putting on record.
Fig. 3 is the Flame Image Process process flow diagram of data processing unit.The fundamental purpose of Flame Image Process is clear in order to obtain, stable, reliable SF
6The leak source video image.After graphics processing unit obtains picture signal from imager 6, graphics processing unit 7 at first samples 16 to image, from thermal imaging array 17, obtain reliable and stable picture signal then, carry out background then and correct 18, reduce the influence of the hot background of imaging array 17 self; Carry out picture element interpolation 19 subsequently, guarantee the smoothness between picture, then image is carried out Nogataization 20 and peak value inhibition 21, so that carry out image sharpening 22 and strengthen the border and contrast adjustment 23, according to default colouring rule image is painted and format conversion 24 again, at last digital signal is converted into standard A V signal output 25.
Fig. 4 is the main control circuit schematic diagram.The core of treatment circuit is CPLD, is with equipment such as storer 30, microprocessor 31 and video output unit 32 outward, and the CPLD indoor design has data processing unit 7, bus control module 29, colouring module 28 and test module 27.Data processing unit 7 reads the output signal and the clock of 3500 thermal imaging devices 26, carry out Flame Image Process such as picture element interpolation 19, Nogataization 20 and image sharpening 22, gained is exported to the colouring module, processings of painting of colouring module 28 pairs of view data is input to the vision signal that video output unit 32 is converted into the AV form then and exports 25.Bus control module 29 is responsible for control bus switch and directions, so that view data is stored into storer 30 on demand or read from storer 30.Microprocessor 31 can access that view data is analyzed and unofficial biography, and whether 27 of test modules are used to test circuit working properly.
In sum, the laser instrument emitted laser shines SF
6There is the part laser beam to turn back on the thermal imaging device behind the tested zone of electrical equipment by reflection, scattering or diffraction.If detected SF
6SF does not take place in electrical equipment
6Gas leaks, and then the operator is the image of object in equipment and the visual range clearly by the observed video image of photoelectric video glasses.If detected SF
6There is SF in electrical equipment
6Gas leaks, because SF
6Gas causes the laser energy of reflected back laser leakage detecting device to fall sharply to the strong absorption of the laser of specific wavelength, thereby forms cloud shade, SE in detected zone
6The laser leakage detecting device after detecting suspect image, can image through the data processing of device finally stablized, clear, reliable video image.Thereby realize making the not visible SE of naked eyes under the common state
6Gas and SF
6The leak source that electrical equipment exists becomes high-visible, and the testing staff of being convenient to electric system orients detected SF fast, accurately
6The leak source that electrical equipment exists makes the service work of equipment become evidence-based.
Be that example is described in detail only above should be appreciated that to open laser.Similarly, detection SF of the present utility model
6Laser detector in the ordinary course of things, can close laser instrument, the leak source than gross leak is accurately located in other light sources and imagings such as only to be background with the sky by infrared lens receive solar source.Other light sources such as reception solar source carry out leak source testing principle and are similar to unlatching laser, carry out leak source when receiving LASER Light Source and detect.In addition, also receive sunshine when laser instrument can also be opened, adjust LASER Light Source, make infrared lens obtain suitable light source by light adjusting controller.For simplicity's sake, repeat no more herein.
This device has the following advantages:
Unique photoelectric video imaging technique makes outdoor detection from then on no longer be subjected to the influence of sunlight, all can obtain similar effect to watch 48 cun wide-screen films at 4.5 meters in any case, makes SF
6It is light, comfortable, happy that the finding leak source work of electrical equipment becomes.
Digital image processing techniques have solved simple infrared technique and have not been suitable for use under the indoor or cloudy no sunshine situation by reference.Device still can obtain imaging effect clearly by the infrared ray in the sunshine under the situation of not opening laser.
Ripple suppresses the picture contrast treatment technology, shields and weakened in the image of output to have the spuious ripple of making an uproar, and has significantly improved accuracy of detection, makes display effect just as clear as the digital camera.
The leak source location rapidly, accurately.
Using this device to carry out SF
6When the electrical equipment leak source detected, detected equipment need not to have a power failure, and can carry out SF at any time
6Finding leak source work, and according to lookup result orderly carry out overhaul of the equipments work.
Those skilled in the art can be obvious, can carry out various modifications and variations and not depart from spirit and scope of the present utility model above-mentioned exemplary embodiment of the present utility model.Therefore, be intended to make the utility model to cover to drop in appended claims and the equivalence techniques scheme scope thereof to modification of the present utility model and modification.
Claims (9)
1. a laser leakage detecting device that detects sulfur hexafluoride is characterized in that, comprising:
Power supply unit;
Receive the infrared lens of light source and imaging;
Light filter, place described infrared lens after, and equal wave band light in the surrounding environment sunlight carried out shielding processing;
Imager links to each other with described power supply unit and with the detected image output that forms;
Data processing unit links to each other with described imager, and the detected image of imager output is accurately handled with output testing result image.
2. laser leakage detecting device as claimed in claim 1 is characterized in that described light source comprises sunshine and/or laser.
3. laser leakage detecting device as claimed in claim 2 is characterized in that, described laser leakage detecting device also comprises:
Laser instrument links to each other with described power supply unit and by described power supply unit power supply;
Beam expanding lens places described laser instrument front end, make laser that described laser instrument sends by and carry out the field of view angle adjustment;
Infrared indicator links to each other with described power supply unit and by described power supply unit power supply, indicates laser beam position under the current state.
4. laser leakage detecting device as claimed in claim 1 is characterized in that, described data processing unit also comprises:
The Digital Image Processing unit receives detected image and converts thereof into digital picture from described imager;
The picture contrast processing unit receives digital picture from described digital processing element, digital picture degree of comparing is handled, to obtain the image of contrast resolution with the background grey scale change;
The accurate positioning unit of leak source receives digital picture from described picture contrast processing unit, and accurately locatees sulfur hexafluoride leak source position with output testing result image according to the differentiation of different images imaging under equal background.
5. laser leakage detecting device as claimed in claim 4 is characterized in that, described contrast is handled and comprised: handle based on visual space resolution, temporal resolution, frequency resolution degree of comparing.
6. as each described laser leakage detecting device of claim 1～4, it is characterized in that described laser leakage detecting device also comprises:
Video recorder links to each other with described data processing unit, with storage testing result image.
7. as each described laser leakage detecting device of claim 1～4, it is characterized in that described laser leakage detecting device also comprises:
The photoelectric video glasses link to each other with described data processing unit, to show the testing result image.
8. laser leakage detecting device as claimed in claim 7 is characterized in that, described photoelectric video glasses are dismountable.
9. as each described laser leakage detecting device of claim 1～4, it is characterized in that described laser leakage detecting device also comprises:
PAL that links to each other with described data processing unit or TSC-system formula normal video output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202142567U CN201600230U (en) | 2009-11-27 | 2009-11-27 | Laser leak detection device for detecting sulfur hexafluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202142567U CN201600230U (en) | 2009-11-27 | 2009-11-27 | Laser leak detection device for detecting sulfur hexafluoride |
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| Publication Number | Publication Date |
|---|---|
| CN201600230U true CN201600230U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202142567U Expired - Lifetime CN201600230U (en) | 2009-11-27 | 2009-11-27 | Laser leak detection device for detecting sulfur hexafluoride |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389713A (en) * | 2013-07-23 | 2013-11-13 | 国家电网公司 | Power cable operation work comprehensive management platform based on cloud service system |
| CN106500925A (en) * | 2016-10-25 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of detecting system of GIS device gas leakage, device and method |
| CN109724753A (en) * | 2017-10-27 | 2019-05-07 | 普发真空公司 | For checking the leak detection module and method of the sealing compactness of object under test by search gas |
-
2009
- 2009-11-27 CN CN2009202142567U patent/CN201600230U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389713A (en) * | 2013-07-23 | 2013-11-13 | 国家电网公司 | Power cable operation work comprehensive management platform based on cloud service system |
| CN103389713B (en) * | 2013-07-23 | 2015-08-19 | 国家电网公司 | Based on the power cable operation work comprehensive management platform of cloud service system |
| CN106500925A (en) * | 2016-10-25 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of detecting system of GIS device gas leakage, device and method |
| CN109724753A (en) * | 2017-10-27 | 2019-05-07 | 普发真空公司 | For checking the leak detection module and method of the sealing compactness of object under test by search gas |
| CN109724753B (en) * | 2017-10-27 | 2022-08-16 | 普发真空公司 | Leak detection module and method for checking the tightness of a seal of an object to be tested by means of a tracer gas |
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| CX01 | Expiry of patent term |
Granted publication date: 20101006 |