CN103149509A - Corona ultraviolet detecting device capable of locating and measuring distance - Google Patents
Corona ultraviolet detecting device capable of locating and measuring distance Download PDFInfo
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- CN103149509A CN103149509A CN2013100454103A CN201310045410A CN103149509A CN 103149509 A CN103149509 A CN 103149509A CN 2013100454103 A CN2013100454103 A CN 2013100454103A CN 201310045410 A CN201310045410 A CN 201310045410A CN 103149509 A CN103149509 A CN 103149509A
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Abstract
The invention discloses a corona ultraviolet detecting device capable of locating and measuring distance. The corona ultraviolet detecting device capable of locating and measuring the distance comprises an ultraviolet camera lens, an ultraviolet detector, a signal processing circuit, a data displayer and a laser viewer. The optical axis of the ultraviolet camera lens and the optical axis of the ultraviolet detector are the same. A laser device base seat is installed on the ultraviolet camera lens in a sleeved mode. A visible laser and a laser back wave probe are installed on the laser device base seat. The laser back wave probe is located right above the visible laser. The laser back wave probe is close to the visible laser. The visible laser is electrically connected with the signal processing circuit through a laser distance measurement circuit. The laser back wave probe is connected with the signal processing circuit through the laser distance measurement circuit. Outgoing light beams of the visible laser are close to and parallel to the optical axis of the ultraviolet lens. The corona ultraviolet detecting device capable of locating and measuring the distance has the advantages of being capable of rapidly finding an appropriate portion, where discharging occurs, of an insulator, or finding which insulator is discharged, achieving the aims that discharging positions of the insulator are located, being capable of obtaining parameters of distance measurement, and obtaining ultraviolet radiation intensity by combination of the distance measurement.
Description
Technical field
The present invention relates to a kind of corona ultraviolet detection instrument, but especially relate to a kind of positioning distance measuring corona ultraviolet detection instrument.
Background technology
Along with the fast development of China's electrical network scale, the partial discharges fault problem of power equipment becomes increasingly conspicuous.Partial discharges fault generally shows as corona discharge in early days, after corona discharge refers to that electric field intensity surpasses certain value near electrode, causes ambient gas (normally air) partial ionization and a kind of self-maintained discharge phenomenon of producing.Corona belongs to high pressure pulse discharge, can follow the generation of plasma in discharge process, and it can make air generation chemical reaction, produces the products such as ozone and nitrogen oxide, causes the insulation corrosion of electrical equipment and damages, and then causing major accident and electrical network paralysis.
International Commission on Illumination (CIE) is defined the UV radiation wave band, i.e. the electromagnetic radiation of 100nm～400nm is called ultraviolet ray.Concrete minute three wave bands, i.e. UVA, UVB and UVC.Wherein the UVC wavelength band is 100nm～280nm, wherein 100nm～200nm belongs to vacuum ultraviolet, very fast by oxygen absorption (formation ozone) in air, and the light of 200nm in solar spectrum～280nm wave band can be inhaled strongly by ozonosphere when passing through the atmospheric advection layer, and this wave band is called as a day blind ultraviolet band.Therefore lack the ultraviolet light of 100-280nm wave band on ground, the target on ground in the face of the UVC ultraviolet band detects, even also can avoid the background interference of sunshine sunny daytime, the accuracy of detection is high.
And the early stage shelf depreciation discharge of power equipment just in time can be sent the light of UVC wave band, the power equipment early discharge ultraviolet detection technique of therefore carrying out for the UVC wave band is in recent years risen gradually, and obtained greatly applying in western countries' electric system, also more and more come into one's own in China.Undoubtedly, if can detect to the early discharge of power equipment the generation that just can in time prevent electric power accident.
Yet because China's blind UV. Image Devices research in highly sensitive day is still immature, adopt external high-performance UV. Image Devices price very expensive again, so China is facing very large difficulty aspect corona ultraviolet imager practical research at present.But adopting unit (non-imaging) detection method to carry out the detection of corona UV radiation intensity is a kind of proper technology, technical difficulty is relatively low, the cost of development of instrument is more much lower than corona ultraviolet imager, but at present a lot of unit ultraviolet detection technology lacks object locating system.The consequence of bringing is that corona discharge appears in that position that can't judge insulator, and even which insulator corona discharge occurs and also can't judge clear.
In addition, square being inversely proportional to of corona UV radiation intensity and transmission range, so there are much relations the intensity that detects of instrument and corona discharge position from the distance of detection instrument.So a kind of corona optical detecting instrument that not only can locate but also can provide UV radiation intensity in conjunction with measuring distance is relatively to meet the practical application needs.
Summary of the invention
But technical matters to be solved by this invention is to provide a kind of positioning distance measuring corona ultraviolet detection instrument.
the present invention solves the problems of the technologies described above the technical scheme that adopts: but positioning distance measuring corona ultraviolet detection instrument, it is characterized in that comprising ultraviolet lens, ultraviolet detector, signal processing circuit, data display equipment and laser sight glass, described ultraviolet lens and ultraviolet detector be totally one optical axis, described ultraviolet detector is electrically connected to described signal processing circuit, described signal processing circuit is electrically connected to described data display equipment, be set with the laser instrument pedestal on described ultraviolet lens, visible laser and return laser beam probe are installed on described laser instrument pedestal, described return laser beam probe be positioned at described visible laser directly over, described return laser beam probe is near described visible laser, visible laser is electrically connected to by laser ranging circuit and signal treatment circuit, described return laser beam probe is connected with described signal processing circuit by described laser ranging circuit, the visible laser outgoing beam near and be parallel to the optical axis of ultraviolet lens.
Be provided with the first circular hole and the second circular hole on described laser instrument pedestal, visible laser is arranged in the first circular hole, the return laser beam probe is arranged in the second circular hole, also be drilled with two minor thread holes in the laser instrument pedestal on the direction vertical with the first circular hole, the axis place in these two minor thread holes in the same horizontal line, the axis in two minor thread holes and the axis quadrature of the first circular hole, available two screw subtends are passed two minor thread holes visible laser are compressed, the laser instrument pedestal coordinate with the lens barrel external thread of ultraviolet lens by threaded hole install fixing.
Ultraviolet lens comprises lens barrel, convex lens and diaphragm, the internal diameter of lens barrel is 10mm-40mm, the length of lens barrel is 5-10 times of internal diameter, ultraviolet detector is arranged on the lens barrel back, convex lens are contained in the middle rear end of lens barrel, diaphragm is contained in the lens barrel rear end and between ultraviolet detector and convex lens, the inside surface of lens barrel has the delustring screw thread and is black, and lens barrel is made by aluminium or plastics.
Ultraviolet lens is the Cassegrain camera lens, ultraviolet detector is arranged on the back of Cassegrain camera lens, the Cassegrain camera lens comprises lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror, the parabola principal reflection mirror is positioned at the rear end of lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror be totally one optical axis, the hyperboloid secondary mirror is positioned at the front of parabola principal reflection mirror and is positioned in the focus of parabola principal reflection mirror, and the inside surface of lens barrel has the delustring screw thread and is black, and lens barrel is made by aluminium or plastics.
Ultraviolet detector is that response wave band is the unit light detector of 100-280nm or adds the 100-280nm ultraviolet band pass filter by wide spectroscopic unit detector and form.
Signal processing circuit is made of ultraviolet light intensity signal acquisition circuit and data analysis circuit, and described data display equipment is LCDs or is made of digital display tube.
The operating wavelength range of visible laser is in 630-700nm or 500-570nm scope.
Narrow band pass filter and visible-light detector that return laser beam probe is complementary by visible light lens, with the visible laser wavelength form.
The laser ranging circuit is the phase laser distance measurement circuit, and described phase laser distance measurement circuit converts distance signal to digital signal and is input to signal processing circuit.
Also comprise shell, described ultraviolet detector, signal processing circuit and data display equipment are arranged in described shell, described laser sight glass is fixed on the top of shell, and the narrow band pass filter that the laser sight glass is complementary by the visible light operation wavelength of visible laser adds eyepiece and consists of.
Compared with prior art, advantage of the present invention is by the ultraviolet lens of neglecting the rink corner ultraviolet detection that discharges, and field range is restricted to minimum as far as possible; Form laser facula by single laser beam irradiation to insulator simultaneously, below laser facula, distance is that the position of h is exactly roughly the most violent place of discharge, and these utilize the laser sight glass to observe and obtain.Can find fast like this insulator roughly discharge to occur which position, perhaps discharge has occured in which insulator, has reached the purpose that the discharge position to insulator positions.In addition, the present invention can also provide UV radiation intensity in conjunction with measuring distance.
Description of drawings
Fig. 1 is structural drawing of the present invention;
Fig. 2 is the structural drawing of laser instrument pedestal of the present invention;
Fig. 3 is the structural drawing of the ultraviolet lens of embodiments of the invention one;
Fig. 4 is the structural drawing of the ultraviolet lens of embodiments of the invention two;
Fig. 5 is discharge insulator position and the laser facula distribution plan that in the present invention, the laser sight glass is seen.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
embodiment one: but positioning distance measuring corona ultraviolet detection instrument, comprise ultraviolet lens 1, ultraviolet detector 3, signal processing circuit 6, data display equipment 7 and laser sight glass 8, ultraviolet lens 1 and ultraviolet detector 3 be totally one optical axis 31, ultraviolet detector 3 is electrically connected to signal processing circuit 6, signal processing circuit 6 is electrically connected to data display equipment 7, be set with laser instrument pedestal 2 on ultraviolet lens 1, visible laser 4 and return laser beam probe 42 are installed on laser instrument pedestal 2, return laser beam probe 42 be positioned at visible laser 4 directly over, return laser beam probe 42 is near visible laser 4, visible laser 4 is electrically connected to signal processing circuit 6 by laser ranging circuit 5, return laser beam probe 42 is connected with signal processing circuit 6 by laser ranging circuit 5, visible laser 4 outgoing beams 41 near and be parallel to the optical axis 31 of ultraviolet lens.Distance between the optical axis 31 of outgoing beam 41 and ultraviolet lens is h.
Be provided with the first circular hole 22 and the second circular hole 24 on laser instrument pedestal 2, visible laser 4 is arranged in the first circular hole 22, and return laser beam probe 42 is arranged in the second circular hole 24.Also be drilled with two minor thread holes 23,25 in pedestal on the direction vertical with the first circular hole 22, the axis place in these two minor thread holes in the same horizontal line, the axis in two minor thread holes and the axis quadrature of circular hole 22, available two screw subtends pass two minor thread holes 23,25 visible laser 4 are compressed.Pedestal 2 coordinates with the lens barrel external thread of ultraviolet lens 1 to install by threaded hole 21 to be fixed.
Ultraviolet lens 1 comprises lens barrel 1A, convex lens 10 and diaphragm 11, the internal diameter of lens barrel is 10mm-40mm, the length of lens barrel is 5-10 times of internal diameter, ultraviolet detector 3 is arranged on the lens barrel back, convex lens 10 are contained in the middle rear end of lens barrel, diaphragm 11 is contained in the lens barrel rear end and between ultraviolet detector 3 and convex lens 10, the inside surface of lens barrel has the delustring screw thread and is black.Lens barrel is made of light materials such as aluminium or plastics.
The operating wavelength range of visible laser 4 is in 630-700nm or 500-570nm scope.
Narrow band pass filter and visible-light detector that return laser beam probe 42 is complementary by visible light lens, with the visible laser wavelength form.
Also comprise shell, ultraviolet detector 3, signal processing circuit 6 and data display equipment 7 arrange in the enclosure, laser sight glass 8 is fixed on the top of shell, and the narrow band pass filter 81 that laser sight glass 8 is complementary by the visible light operation wavelength of visible laser adds eyepiece and consists of.
Embodiment two: ultraviolet lens 1 is the Cassegrain camera lens, ultraviolet detector 3 is arranged on the back of Cassegrain camera lens 1, Cassegrain camera lens 1 comprises lens barrel 1B, parabola principal reflection mirror 15 and hyperboloid secondary mirror 16, parabola principal reflection mirror 15 is positioned at the rear end of lens barrel, parabola principal reflection mirror 15 and hyperboloid secondary mirror 16 be totally one optical axis, and hyperboloid secondary mirror 16 is positioned at the front of parabola principal reflection mirror 15 and is positioned in the focus of parabola principal reflection mirror 15.The inside surface of lens barrel has the delustring screw thread and is black.Lens barrel is made of light materials such as aluminium or plastics.
When surveying UV signal, the ultraviolet signal that discharge insulator 9 discharges are sent arrives ultraviolet lens 1, and the structure of camera lens 1 makes only has the light at close optical axis 31 centers just can shine on ultraviolet detector 3.Because ultraviolet detector 3 is made of the photo-detector of response wave band in the 100-280nm scope, also can add the 100-280nm ultraviolet band pass filter by wide spectral detector forms, so 3 of detectors respond the corona UV signal in the 100-280nm scope, even also can avoid the interference of sunshine on sunny daytime like this, the signal false drop rate is low.
When ultraviolet detector 3 is sensed the signal of corona UV radiation, can induce voltage or current signal, at this moment by signal processing circuit 6, voltage or the current signal that induces be amplified, and carry out the data collection.The distance parameter (digital signal) of bringing in conjunction with laser ranging circuit 5 simultaneously, UV signal intensity when the ultraviolet light intensity signal is converted to detection range and is 1m (being called for short 1m equivalence UV radiation signal intensity), UV signal intensity and the equivalent UV radiation signal intensity of 1m with instrument actual position shown by data display equipment 7 at last.
In order to provide an objective strength of discharge reference frame, the UV radiation intensity that detects under any measuring distance can be converted to the UV radiation intensity under the 1m reference distance, and unified UV radiation intensity under reference distance is the objective basis of judgement corona discharge UV radiation intensity.If the UV radiation intensity that detects from discharge target 1m place is
I 1 , the UV radiation intensity that the instrument test position is detected is
I x , both relation is in accordance with following relation:
I x =(
x 2 ) *
I 1 , wherein
xExpression optical detection instrument is from the distance of discharge target.Like this, no matter the UV radiation intensity of the lower detection of any distance is much, can be converted to the equivalent UV radiation intensity under the 1m reference distance.The equivalent UV radiation intensity that the UV radiation intensity of each different discharge target of comparison only need to compare under the 1m reference distance is just passable, and this provides an objective and unified standard for the judgement of power equipment early discharge fault level.
During distance test, visible laser 4 sends visible light beam and shines on discharge insulator 9, and the laser signal that returns from insulator 9 passes the visible light lens of return laser beam probe 42 and narrow band pass filter, responds out voltage at the visible-light detector of return laser beam probe 42.Response voltage carries out signal by laser ranging circuit 5 to be processed, and becomes the digital signal of distance, then delivers to signal processing circuit 6.
In this process, just can observe simultaneously visible laser 4 by laser sight glass 8 and shine hot spot on insulator.In laser sight glass 8, the effect of visible light arrowband 81 optical filters is the contrasts that improve laser facula and background object (as insulator etc.), namely allows the light transmission of visible laser wavelength, and the light of other wavelength is suppressed.Can make like this human eye can clearly see laser facula, can make again human eye see comparatively clearly to background object, finally can the user distinguish laser facula and drop on where going up of what target object, satisfy the technical requirement of detector laser positioning.
During concrete the use, open visible laser 4, the ultraviolet light intensity that shows on observation display 7 simultaneously, carry out the target area search, when finding that ultraviolet light intensity is stronger, can see that by laser sight glass 8 visible laser beam beats the hot spot on high-tension insulator, like this according to the distance h of visible light laser beam axis 41 with ultraviolet light optical axis 31, roughly judging is that discharge has occured for that position of which insulator or insulator, the purpose that also positions with regard to the insulator of having realized discharge.The scene of observing by the laser sight glass has the single beam laser hot spot as shown in Figure 5 on insulator 9, be the discharge position in the place of the laser facula about h in west.Also measured the distance of detection instrument from discharge insulator when having determined discharge position.
If ultraviolet lens 1 is selected the structure of Fig. 3, can find out that large incident angle light 12 can have been eliminated by the delustring screw thread by Multi reflection in lens barrel; The light 13 of slightly large incident angle is through being blocked by diaphragm 11 after lens 10.Only have the light 14 of very little incident angle just can shine on ultraviolet detector 3.If ultraviolet lens 1 is selected the structure of Fig. 4, can find out that the light 17 and 18 of large incident angle all can be eliminated by the delustring screw thread at the inner process of lens barrel Multi reflection; Only having seldom, the light 19 of incident angle just can shine on ultraviolet detector 3.Therefore no matter which kind of ultraviolet lens structure, all can make the field angle of detection instrument as far as possible little, in order to dwindle the field range of detection instrument, makes the target area that detects dwindle as far as possible, improves the accuracy of detection position; Can make again simultaneously the ultraviolet signal visual field in can cover to ultraviolet detector 3 surfaces, the raising instrumental sensitivity.
Claims (10)
1. but positioning distance measuring corona ultraviolet detection instrument, it is characterized in that comprising ultraviolet lens, ultraviolet detector, signal processing circuit, data display equipment and laser sight glass, described ultraviolet lens and ultraviolet detector be totally one optical axis, described ultraviolet detector is electrically connected to described signal processing circuit, described signal processing circuit is electrically connected to described data display equipment, be set with the laser instrument pedestal on described ultraviolet lens, visible laser and return laser beam probe are installed on described laser instrument pedestal, described return laser beam probe be positioned at described visible laser directly over, described return laser beam probe is near described visible laser, visible laser is electrically connected to by laser ranging circuit and signal treatment circuit, described return laser beam probe is connected with described signal processing circuit by described laser ranging circuit, the visible laser outgoing beam near and be parallel to the optical axis of ultraviolet lens.
2. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, it is characterized in that being provided with on described laser instrument pedestal the first circular hole and the second circular hole, visible laser is arranged in the first circular hole, the return laser beam probe is arranged in the second circular hole, also be drilled with two minor thread holes in the laser instrument pedestal on the direction vertical with the first circular hole, the axis place in these two minor thread holes in the same horizontal line, the axis in two minor thread holes and the axis quadrature of the first circular hole, available two screw subtends are passed two minor thread holes visible laser are compressed, the laser instrument pedestal coordinates with the lens barrel external thread of ultraviolet lens by threaded hole to install to be fixed.
3. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, it is characterized in that ultraviolet lens comprises lens barrel, convex lens and diaphragm, the internal diameter of lens barrel is 10mm-40mm, the length of lens barrel is 5-10 times of internal diameter, ultraviolet detector is arranged on the lens barrel back, and convex lens are contained in the middle rear end of lens barrel, and diaphragm is contained in the lens barrel rear end and between ultraviolet detector and convex lens, the inside surface of lens barrel has the delustring screw thread and is black, and lens barrel is made by aluminium or plastics.
4. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, it is characterized in that ultraviolet lens is the Cassegrain camera lens, ultraviolet detector is arranged on the back of Cassegrain camera lens, the Cassegrain camera lens comprises lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror, the parabola principal reflection mirror is positioned at the rear end of lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror be totally one optical axis, the hyperboloid secondary mirror is positioned at the front of parabola principal reflection mirror and is positioned in the focus of parabola principal reflection mirror, the inside surface of lens barrel has the delustring screw thread and is black, lens barrel is made by aluminium or plastics.
5. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1 is characterized in that ultraviolet detector is that response wave band is the unit light detector of 100-280nm or adds the 100-280nm ultraviolet band pass filter by wide spectroscopic unit detector and form.
6. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, it is characterized in that signal processing circuit is made of ultraviolet light intensity signal acquisition circuit and data analysis circuit, described data display equipment is LCDs or is made of digital display tube.
7. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, is characterized in that the operating wavelength range of visible laser is in 630-700nm or 500-570nm scope.
8. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1 is characterized in that narrow band pass filter and visible-light detector that the return laser beam probe is complementary by visible light lens, with the visible laser wavelength form.
9. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, it is characterized in that the laser ranging circuit is the phase laser distance measurement circuit, described phase laser distance measurement circuit converts distance signal to digital signal and is input to signal processing circuit.
10. but a kind of positioning distance measuring corona ultraviolet detection instrument according to claim 1, characterized by further comprising shell, described ultraviolet detector, signal processing circuit and data display equipment are arranged in described shell, described laser sight glass is fixed on the top of shell, and the narrow band pass filter that the laser sight glass is complementary by the visible light operation wavelength of visible laser adds eyepiece and consists of.
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| CN103424673A (en) * | 2013-06-17 | 2013-12-04 | 上海理工大学 | Corona detection system and corona detection method thereof |
| CN103675627A (en) * | 2013-12-25 | 2014-03-26 | 深圳市同步银星电气有限公司 | Photonic positioning ultraviolet detector |
| CN108646153A (en) * | 2018-05-18 | 2018-10-12 | 云南电网有限责任公司电力科学研究院 | Primary equipment partial discharge detection device |
| CN109937100A (en) * | 2016-11-11 | 2019-06-25 | 通快激光与***工程有限公司 | Method and processing machine for calibration scan device |
| CN110596546A (en) * | 2019-09-10 | 2019-12-20 | 中国科学院深圳先进技术研究院 | Bow net arcing detection device for inhibiting background light |
| CN111491444A (en) * | 2020-05-19 | 2020-08-04 | 常州纵慧芯光半导体科技有限公司 | Range finding sensor transmission module and range finding sensor |
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| CN111491444B (en) * | 2020-05-19 | 2021-07-27 | 常州纵慧芯光半导体科技有限公司 | Range finding sensor transmission module and range finding sensor |
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