CN103149509B - Can positioning distance measuring corona ultraviolet detector - Google Patents
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- CN103149509B CN103149509B CN201310045410.3A CN201310045410A CN103149509B CN 103149509 B CN103149509 B CN 103149509B CN 201310045410 A CN201310045410 A CN 201310045410A CN 103149509 B CN103149509 B CN 103149509B
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Abstract
The invention discloses can positioning distance measuring corona ultraviolet detector, including ultraviolet lens, ultraviolet detector, signal processing circuit, data display equipment and laser sight glass, ultraviolet lens and ultraviolet detector be totally one optical axis, ultraviolet lens is set with laser instrument pedestal, laser instrument pedestal is installed visible laser and return laser beam probe, return laser beam probe is positioned at the surface of visible laser, return laser beam probe is near visible laser, visible laser is electrically connected with signal processing circuit by laser ranging circuit, return laser beam probe is connected with signal processing circuit by laser ranging circuit, visible laser outgoing beam is adjacent and parallel to the optical axis of ultraviolet lens.Its advantage is can be quickly found out insulator substantially which position to there occurs electric discharge, or which insulator there occurs electric discharge, has reached the purpose that the discharge position of insulator is positioned；But also measuring distance parameter can be obtained, and provide UV radiation intensity in conjunction with measuring distance.
Description
Technical field
The present invention relates to a kind of corona ultraviolet detector, especially relating to one can positioning distance measuring corona ultraviolet detector.
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 early stage normally behaves as corona discharge, after corona discharge refers to that near electrode, electric field intensity exceedes certain value, causes ambient gas (usually air) partial ionization and a kind of self-maintained discharge phenomenon of producing.Corona belongs to high pressure pulse discharge, can with the generation of plasma in discharge process, and it can make air generation chemical reaction, produces the product such as ozone and nitrogen oxide, causes isolated corrosion and the damage of electrical equipment, in turn results in major accident and electrical network paralysis.
Ultraviolet radiation wave band is defined by International Commission on Illumination (CIE), and namely the electromagnetic radiation of 100nm～400nm is called ultraviolet.Concrete point three wave bands, i.e. UVA, UVB and UVC.Wherein UVC wavelength band is 100nm～280nm, wherein 100nm～200nm belongs to VUV, quickly absorbed (formation ozone) by oxygen in atmosphere, and the light of 200nm～280nm wave band can be inhaled by ozone layer strongly when passing through atmospheric advection layer in solar spectrum, this wave band is referred to as day blind ultraviolet band.Therefore lacking the ultraviolet light of 100-280nm wave band on ground, on ground, the target in the face of UVC ultraviolet band detects, even if can also avoid the ambient interferences of sunlight sunny daytime, the accuracy of detection is high.
And power equipment early stage shelf depreciation electric discharge just can send the light of UVC wave band, therefore the power equipment early discharge ultraviolet corona detector carried out for UVC wave band in recent years rises gradually, and in western countries' power system, obtain very big popularization and application, also increasingly come into one's own in China.Certainly, if the early discharge of power equipment can be carried out detection just can prevent the generation of electric power accident in time.
But at present owing to the blind UV. Image Devices research of China's highly sensitive day is still immature, adopt external high-performance UV. Image Devices price much more expensive again, therefore China faces very big difficulty in corona ultraviolet imager practical research.But adopting unit (non-imaged) detection method to carry out the detection of corona UV radiation intensity is a kind of proper technology, technical difficulty is relatively low, the development cost of instrument is more much lower than corona ultraviolet imager, but a lot of unit ultraviolet detection technology lack object locating system at present.The consequence brought is that position that cannot judge insulator corona discharge occurs, and even to occur that corona discharge also cannot judge clear for which insulator.
Additionally, square being inversely proportional to of corona UV radiation intensity and transmission range, there are much relations the intensity that therefore instrument detects and corona discharge position from the distance of survey meter.So, a kind of not only can position but also the corona optical detecting instrument of UV radiation intensity can have been provided in conjunction with measuring distance compare and meet practical application needs.
Summary of the invention
The technical problem to be solved is to provide one can positioning distance measuring corona ultraviolet detector.
nullThis invention address that the technical scheme that above-mentioned technical problem adopts is: can positioning distance measuring corona ultraviolet detector，It is characterized in that including 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 electrically connects with described signal processing circuit，Described signal processing circuit electrically connects with described data display equipment，Described ultraviolet lens is set with laser instrument pedestal，Described laser instrument pedestal is installed visible laser and return laser beam probe，Described return laser beam probe is positioned at the surface of described visible laser，Described return laser beam probe is near described visible laser，Visible laser is electrically connected with signal processing circuit by laser ranging circuit，Described return laser beam probe is connected with described signal processing circuit by described laser ranging circuit，Visible laser outgoing beam is adjacent and parallel to the optical axis of ultraviolet lens.
Described laser instrument pedestal is provided with the first circular hole and the second circular hole, visible laser is arranged in the first circular hole, return laser beam probe is arranged in the second circular hole, direction vertical with the first circular hole in laser instrument pedestal is also drilled with two minor thread holes, the axis place in the two minor thread hole is in the same horizontal line, the axis in two minor thread holes and the orthogonal axe of the first circular hole, visible laser is compressed by available two screws to through two minor thread holes, and laser instrument pedestal coordinates installation fixing by screwed hole with the lens barrel external screw thread of ultraviolet lens.
Ultraviolet lens includes 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 after lens barrel, convex lens is contained in the middle rear end of lens barrel, diaphragm is contained in lens barrel rear end and between ultraviolet detector and convex lens, and the inner surface of lens barrel has delustring screw thread and in black, and lens barrel is made up of aluminum or plastics.
Ultraviolet lens is Cassegrain camera lens, ultraviolet detector is arranged on after Cassegrain camera lens, Cassegrain camera lens includes lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror, parabola principal reflection mirror is positioned at the rear end of lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror totally one optical axis, within hyperboloid secondary mirror is positioned at before parabola principal reflection mirror and is positioned at the focus of parabola principal reflection mirror, the inner surface of lens barrel has delustring screw thread and in black, and lens barrel is made up of aluminum or plastics.
Ultraviolet detector is response wave band to be the unit light detector of 100-280nm or is added 100-280nm ultraviolet band pass filter by wide spectroscopic unit detector and form.
Signal processing circuit is made up of ultraviolet light intensity signal acquisition circuit and data analysis circuit, and described data display equipment is LCDs or is made up of digital display tube.
The operating wavelength range of visible laser is within the scope of 630-700nm or 500-570nm.
Narrow band pass filter and visible-light detector that return laser beam probe is matched by visible light lens and visible laser wavelength form.
Laser ranging circuit is 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 include 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 laser sight glass is matched by the visible ray operation wavelength of visible laser adds eyepiece and constitutes.
Compared with prior art, it is an advantage of the invention that the ultraviolet lens by neglecting rink corner carries out electric discharge ultraviolet detection, field range is restricted to as far as possible minimum；Forming laser facula to insulator by single laser beam irradiation, below laser facula, distance is the position of h is exactly substantially place the most violent of discharging simultaneously, and these utilize laser sight glass to observe to obtain.So can be quickly found out insulator substantially which position and there occurs electric discharge, or which insulator there occurs electric discharge, has reached the purpose that the discharge position of insulator is positioned.It is also possible to provide UV radiation intensity in conjunction with measuring distance.
Accompanying drawing explanation
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the structure chart of the laser instrument pedestal of the present invention；
Fig. 3 is the structure chart of the ultraviolet lens of embodiments of the invention one；
Fig. 4 is the structure chart of the ultraviolet lens of embodiments of the invention two；
Fig. 5 is the discharge insulator position and laser facula scattergram that in the present invention, laser sight glass is seen.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
nullEmbodiment one: can positioning distance measuring corona ultraviolet detector，Including 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 totally one optical axis 31，Ultraviolet detector 3 electrically connects with signal processing circuit 6，Signal processing circuit 6 electrically connects with data display equipment 7，Ultraviolet lens 1 is set with laser instrument pedestal 2，Laser instrument pedestal 2 is installed visible laser 4 and return laser beam probe 42，Return laser beam probe 42 is positioned at the surface of visible laser 4，Return laser beam probe 42 is near visible laser 4，Visible laser 4 is electrically connected with 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 beam 41 is adjacent and parallel to the optical axis 31 of ultraviolet lens.Distance between the optical axis 31 of outgoing beam 41 and ultraviolet lens is h.
Being provided with the first circular hole 22 and the second circular hole 24 on laser instrument pedestal 2, it is seen that light laser 4 is arranged in the first circular hole 22, return laser beam probe 42 is arranged in the second circular hole 24.Direction vertical with the first circular hole 22 in pedestal is also drilled with two minor thread holes 23,25, the axis place in the two minor thread hole is in the same horizontal line, the axis in two minor thread holes and the orthogonal axe of circular hole 22, can use two screws and compressed by visible laser 4 to through two minor thread holes 23,25.Pedestal 2 coordinates installation fixing by screwed hole 21 with the lens barrel external screw thread of ultraviolet lens 1.
Ultraviolet lens 1 includes 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 after lens barrel, convex lens 10 is contained in the middle rear end of lens barrel, diaphragm 11 is contained in lens barrel rear end and between ultraviolet detector 3 and convex lens 10, and the inner surface of lens barrel has delustring screw thread and in black.Lens barrel is made up of the light material such as aluminum or plastics.
Ultraviolet detector 3 is for unit light detector that response wave band is 100-280nm or is added 100-280nm ultraviolet band pass filter by wide spectroscopic unit detector and forms.
Signal processing circuit 6 is made up of ultraviolet light intensity signal acquisition circuit and data analysis circuit, and data display equipment is LCDs or is made up of digital display tube.
The operating wavelength range of visible laser 4 is within the scope of 630-700nm or 500-570nm.
Narrow band pass filter and visible-light detector that return laser beam probe 42 is matched by visible light lens and visible laser wavelength form.
Laser ranging circuit 5 is phase laser distance measurement circuit, and distance signal is converted to digital signal and is input to signal processing circuit 6 by phase laser distance measurement circuit.
Also include 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 matched by the visible ray operation wavelength of visible laser adds eyepiece and constitutes.
Embodiment two: ultraviolet lens 1 is Cassegrain camera lens, ultraviolet detector 3 is arranged on after Cassegrain camera lens 1, Cassegrain camera lens 1 includes 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 totally one optical axis, within hyperboloid secondary mirror 16 is positioned at before parabola principal reflection mirror 15 and is positioned at the focus of parabola principal reflection mirror 15.The inner surface of lens barrel has delustring screw thread and in black.Lens barrel is made up of the light material such as aluminum or plastics.
During detection UV signal, the ultraviolet signal that discharge insulator 9 electric discharge sends arrives ultraviolet lens 1, and the structure of camera lens 1 makes only just can be irradiated on ultraviolet detector 3 near the light at optical axis 31 center.Because ultraviolet detector 3 is made up of response wave band photo-detector within the scope of 100-280nm, 100-280nm ultraviolet band pass filter can also be added by wide spectral detector to form, so the corona UV signal within the scope of 100-280nm is only responded by detector 3, accordingly even when also can avoid the interference of sunlight on sunny daytime, signal false drop rate is low.
When ultraviolet detector 3 senses corona purple extraradial signal, inducing voltage or current signal, at this moment by signal processing circuit 6, voltage or current signal to inducing are amplified, and carry out data acquisition.In combination with the distance parameter (digital signal) that laser ranging circuit 5 is brought, it is the UV signal intensity (being called for short 1m equivalence ultraviolet radiated signal strength) during 1m that ultraviolet light intensity signal is converted to detection range, finally the UV signal intensity of actual for instrument position and 1m equivalence ultraviolet radiated signal strength is displayed by data display equipment 7.
In order to provide an objective strength of discharge reference frame, the UV radiation intensity detected under any measuring distance can be converted to the UV radiation intensity under 1m reference distance, and unified with the UV radiation intensity under reference distance for judging the objective basis of corona discharge UV radiation intensity.If the UV radiation intensity detected from discharge target 1m place isI 1 , the UV radiation intensity that instrument test position is detected isI x , then the relation of the two is in accordance with following relation:I x =(x 2 ) ×I 1 , whereinxRepresent the optical detection instrument distance from discharge target.So, no matter any UV radiation intensity apart from lower detection is much, can be converted to the equivalent UV radiation intensity under 1m reference distance.The equivalent UV radiation intensity that relatively UV radiation intensity of each different discharge target has only to compare under 1m reference distance is just passable, and this is that power equipment early discharge fault level judges to provide an objective and unified standard.
During distance test, visible laser 4 sends visible light beam and is irradiated on discharge insulator 9, and the laser signal returned from insulator 9 passes visible light lens and the narrow band pass filter of return laser beam probe 42, responds out voltage on the visible-light detector of return laser beam probe 42.Response voltage is carried out signal processing by laser ranging circuit 5, becomes the digital signal of distance, is then delivered to signal processing circuit 6.
In this process, just can be observed that by laser sight glass 8 visible laser 4 is irradiated to the hot spot on insulator simultaneously.In laser sight glass 8, the effect of visible ray arrowband 81 optical filter is the contrast improving laser facula and background object (such as insulator etc.), namely allows the light transmission of visible laser wavelength, and the light of other wavelength is suppressed.Human eye so can be enable to clearly see laser facula, human eye can be made again background object to be seen comparatively clear, finally can distinguish laser facula drops on where going up of what target object by user, meet the technology requirement of detector laser positioning.
Time specifically used, open visible laser 4, observe the ultraviolet light intensity of display on display 7 simultaneously, carry out target area search, when finding that ultraviolet light intensity is stronger, by laser sight glass 8 it can be seen that visible laser beam beats the hot spot on high-tension insulator, so distance h according to visible light lasers optical axis 41 with ultraviolet light optical axis 31, substantially judge that position of which insulator or insulator there occurs electric discharge, be also achieved that the purpose that the insulator to electric discharge positions.The scene observed by laser sight glass, as it is shown in figure 5, there is single beam laser hot spot on insulator 9, is electric discharge position in the place of the about h in laser facula west.Also the survey meter distance from discharge insulator has been measured while determining discharge position.
If ultraviolet lens 1 selects the structure of Fig. 3, then can be seen that big angle of incidence light 12 can be eliminated by delustring screw thread by multiple reflections in lens barrel；The light 13 of slightly larger angle of incidence can be blocked by diaphragm 11 after lens 10.The light 14 of only only small angle of incidence just can be irradiated on ultraviolet detector 3.If ultraviolet lens 1 selects the structure of Fig. 4, then can be seen that the light 17 and 18 of big angle of incidence all can be eliminated by delustring screw thread through multiple reflections inside lens barrel；Only seldom the light 19 of angle of incidence just can be irradiated on ultraviolet detector 3.Therefore no matter which kind of ultraviolet lens structure, the angle of visual field that all can make detection instrument is as far as possible little, in order to reduce the field range of detection instrument so that the target area detected reduces as far as possible, improves the accuracy of detection position；Can make again simultaneously the ultraviolet signal in visual field can cover to ultraviolet detector 3 surface, raising instrumental sensitivity.
Claims (7)
- null1. can positioning distance measuring corona ultraviolet detector，It is characterized in that including 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 electrically connects with described signal processing circuit，Described signal processing circuit electrically connects with described data display equipment，Described ultraviolet lens is set with laser instrument pedestal，Described laser instrument pedestal is installed visible laser and return laser beam probe，Described return laser beam probe is positioned at the surface of described visible laser，Described return laser beam probe is near described visible laser，Visible laser is electrically connected with signal processing circuit by laser ranging circuit，Described return laser beam probe is connected with described signal processing circuit by described laser ranging circuit，Visible laser outgoing beam is adjacent and parallel to the optical axis of ultraviolet lens；Described laser instrument pedestal is provided with the first circular hole and the second circular hole, visible laser is arranged in the first circular hole, return laser beam probe is arranged in the second circular hole, direction vertical with the first circular hole in laser instrument pedestal is also drilled with two minor thread holes, the axis place in the two minor thread hole is in the same horizontal line, the axis in two minor thread holes and the orthogonal axe of the first circular hole, visible laser is compressed by available two screws to through two minor thread holes, and laser instrument pedestal coordinates installation fixing by screwed hole with the lens barrel external screw thread of ultraviolet lens；Described ultraviolet lens includes 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 after lens barrel, convex lens is contained in the middle rear end of lens barrel, diaphragm is contained in lens barrel rear end and between ultraviolet detector and convex lens, and the inner surface of lens barrel has delustring screw thread and in black, and lens barrel is made up of aluminum or plastics；Or described ultraviolet lens is Cassegrain camera lens, ultraviolet detector is arranged on after Cassegrain camera lens, Cassegrain camera lens includes lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror, parabola principal reflection mirror is positioned at the rear end of lens barrel, parabola principal reflection mirror and hyperboloid secondary mirror totally one optical axis, within hyperboloid secondary mirror is positioned at before parabola principal reflection mirror and is positioned at the focus of parabola principal reflection mirror, the inner surface of lens barrel has delustring screw thread and in black, and lens barrel is made up of aluminum or plastics.
- 2. according to claim 1 can positioning distance measuring corona ultraviolet detector, it is characterised in that ultraviolet detector is response wave band to be the unit light detector of 100-280nm or is added 100-280nm ultraviolet band pass filter by wide spectroscopic unit detector and form.
- 3. according to claim 1 can positioning distance measuring corona ultraviolet detector, it is characterised in that signal processing circuit is made up of ultraviolet light intensity signal acquisition circuit and data analysis circuit, and described data display equipment is LCDs or is made up of digital display tube.
- 4. according to claim 1 can positioning distance measuring corona ultraviolet detector, it is characterised in that the operating wavelength range of visible laser is within the scope of 630-700nm or 500-570nm.
- 5. according to claim 1 can positioning distance measuring corona ultraviolet detector, it is characterised in that narrow band pass filter and visible-light detector that return laser beam probe is matched by visible light lens and visible laser wavelength form.
- 6. according to claim 1 can positioning distance measuring corona ultraviolet detector, it is characterised in that laser ranging circuit is 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.
- 7. according to claim 1 can positioning distance measuring corona ultraviolet detector, 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 laser sight glass is matched by the visible ray operation wavelength with visible laser adds eyepiece and constitutes.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN103675627B (en) * | 2013-12-25 | 2016-03-30 | 深圳市同步银星电气有限公司 | Photon type location ultraviolet detector |
| DE102016222186B3 (en) | 2016-11-11 | 2018-04-12 | Trumpf Laser- Und Systemtechnik Gmbh | Method for calibrating two scanner devices each for positioning a laser beam in an operating field and processing machine for producing three-dimensional components by irradiation of powder layers |
| 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 |
| 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 |
| 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 |
| CN114325248A (en) * | 2020-09-30 | 2022-04-12 | 宁波阿贝尼红外技术有限公司 | Hand-held type ultraviolet discharge detector |
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| JPH01152377A (en) * | 1987-12-10 | 1989-06-14 | Central Res Inst Of Electric Power Ind | Partial discharge detection method |
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| GB2278435A (en) * | 1991-12-23 | 1994-11-30 | Grinaker Electronics Limited | Optical detection of electrical discharges |
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