CN201335863Y - Electric corona detection instrument - Google Patents
Electric corona detection instrument Download PDFInfo
- Publication number
- CN201335863Y CN201335863Y CNU2008202233400U CN200820223340U CN201335863Y CN 201335863 Y CN201335863 Y CN 201335863Y CN U2008202233400 U CNU2008202233400 U CN U2008202233400U CN 200820223340 U CN200820223340 U CN 200820223340U CN 201335863 Y CN201335863 Y CN 201335863Y
- Authority
- CN
- China
- Prior art keywords
- light
- optical filter
- corona
- image
- ultraviolet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses an electric corona detection instrument, which comprises an optical filter (2), an input end objective lens (3), a micro light image tube (4), an eyepiece (5) and a digital camera recorder (6). The micro light image tube (4) comprises a photoelectric cathode (7), a micro channel plate (8), a photoelectric anode surface (9) and an optical fiber image inverter (10). Different optical filters can be conveniently changed according to the intensity of the background light of visible light lighting without disassembly of other components to adjust the light-transmitting ratio of visible light and ultraviolet light, thereby resulting in small impact of the background light of visible light lighting on the image quality in ultraviolet detection.
Description
Technical field
The utility model relates to the electric equipment fault diagnosis field, the instrument that especially a kind of corona detects.
Background technology
The generation of corona is because rough conductor produces uneven electric field, when voltage is elevated to certain value, because free of air will discharge, forms corona near the electrode that radius-of-curvature is little around uneven electric field.Corona can be metastable discharge type, also can be the early stage of development in the non-uniform electric field gap breakdown process.For the high voltage electric apparatus in the electric system, corona discharge takes place can destroy apparatus insulated performance gradually, cause corona power loss, radio interference, television interference (TVI) and noise.For avoiding the aging power system accident that causes of electric system external insulation, need carry out corona to power equipment and detect.
The main method that corona detects has: visual inspection, the online detection of leakage current, ultrasound examination, far infrared thermal imaging and UV detection etc.The four kinds of methods in front are because of existing defective separately, and the main at present method that adopts UV detection utilizes promptly that corona discharge can give off this characteristic of ultraviolet light in the air, uses the ultraviolet light imaging technology, observes the situation that discharge takes place.The equipment that detects corona by this principle mainly contains following two kinds of technical schemes now:
1, a kind of is a day blind formula corona detection method, and this method is used the double light path design, and ultraviolet ray and visible light are separated.Ultraviolet part uses BT-CCD (attenuate formula CCD backlight) to be the UV-radiation-sensitive original paper, uses a day blind formula optical filter, and the optical filter ultraviolet range is 240-280nm.Visible light partly uses common CCD to do photo-sensitive cell.Then the video output signals of ultraviolet part and the video output signals of visible light part are handled the synthetic stack in back, show by LCD.
Because the ultraviolet inherent characteristic that corona inspires in air, ultraviolet wavelength is dispersed in the 200-400nm scope, peak wavelength is about 350nm, really the luminous energy in blind optical filter scope of day (240-280nm) is very faint, day blind optical filter itself to see through filter very low, generally the transmitance theoretical value is also less than 20%.So use a day blind formula UV detection mode, the sensitivity of UV detection is not high, the detected image noise is big.
For the needs of observing, carry out signal Processing at video section, superpose and strengthen the apparent intensity of UV image but image is carried out frame, by the software and hardware noise reduction technology of vision signal being reduced the noise of image.Power supply power consumption is bigger, and volume is bigger, be inconvenient to portably use, and operation is relatively complicated, and the user of service need could use through special training, and its technical difficulty is big simultaneously, complex structure, manufacturing cost, maintenance cost height.
2, another kind of method based on the use at night, this method is used monochromatic light road design, ultraviolet ray and visible light are controlled visible light and ultraviolet see through ratio with optical filter in the transmitance difference of different wavelength range simultaneously by optical filter, and photo-sensitive cell uses glass twilight image pipe.
The light that sees through optical filter is in the rear portion imaging surface imaging of catadioptric formula camera lens, the cathode plane of twilight image pipe and camera lens rear portion imaging surface are overlapping, cathode plane is under optical excitation, runaway electron, electronics is after the acceleration of high-voltage electrostatic field, the impact fluorescence anode surface also becomes fluoroscopic image, amplifies the fluoroscopic image of observing anode surface by eyepiece.
The ultraviolet filter that use is made with a kind of filter, though filter range in the ultraviolet main crest scope of 350nm, visible light and the ultraviolet fixed ratio that sees through can not be adjusted.When reality is used, the bias light of visible illumination is bigger to the picture quality influence of UV detection, uses the optical filter of different-thickness instead, can regulate the total logical light quantity that enters camera lens, but do not change the component ratio of ultraviolet ray in total logical light quantity, actual adjustable extent is very limited.
The optical filter riding position will be taken off light shield and could change optical filter in the middle of camera lens and light shield, and is very inconvenient in the use.
The utility model content
The purpose of this utility model provide a kind of low in energy consumption, simple to operate, portable, be subjected to bias light to influence the corona detector little, that image definition is high.
Corona detector of the present utility model is achieved by following technical proposals.
Corona detector as shown in Figure 1 comprises optical filter 2, input end object lens 3, twilight image pipe 4, eyepiece 5, digital camera record 6.Wherein twilight image pipe 4 comprises photocathode 7, microchannel plate 8, photo cathode face 9, optical fiber image inverter 10.
The corona detector is aimed at insulator to be detected, and insulator generation corona phenomenon gives off ultraviolet ray.Ultraviolet ray is by optical filter 2, and optical filter 2 can be replaced with the optical filter of different materials easily, and the ultraviolet ray that sees through and the component ratio of visible light change, to adapt to the background of visible illumination under the different condition.
Light is gone into twilight image pipe 4 by optical filter is laggard, photocathode face 7 under optical excitation, runaway electron, electron impact microchannel plate 8, under the effect of high-voltage electrostatic field, electronics constantly clashes into conduit wall and inspires more electronics.
The fluorescent material of the electron impact photo cathode face 9 of output forms the fluoroscopic image that intensity is exaggerated on photo cathode.Fluoroscopic image demonstrates the fluoroscopic image that is fit to eye-observation identification after by optical fiber image inverter 10 inverted images on fibre faceplate.
Corona detector of the present utility model compared with prior art has following good effect.
1. according to the bias light power of visible illumination, under the situation of not dismantling other parts, can change different optical filters easily, visible light and the ultraviolet adjustable ratio that sees through are put in order.Thereby the bias light of visible illumination is less to the picture quality influence of UV detection.
2. at twilight image tube side face, adopt double close-up to focus on (PCM) twilight image pipe, the cathode plane of this twilight image pipe is higher to ultraviolet remolding sensitivity, the electrostatic field required voltage is lower, and the ability of amplification electron kinetic energy is stronger, thereby image fault is little, the sharpness height, volume and power consumption are also less.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a corona detector structural drawing.
Fig. 2 is the filter wavelength scope displayed map of optical filter 2.2 in the embodiment.
Fig. 3 is the filter wavelength scope displayed map of optical filter 2.2 in the embodiment.
Fig. 4 is the microchannel plate cut-away view.
Fig. 5 is a microchannel plate institute connection circuit synoptic diagram.
Fig. 6 is that electronics passes through the microchannel plate synoptic diagram.
Embodiment
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Corona detector as shown in Figure 1 comprises optical filter 2, input end object lens 3, twilight image pipe 4, eyepiece 5, digital camera record 6.Wherein twilight image pipe 4 comprises photocathode 7, microchannel plate 8, photo cathode face 9, optical fiber image inverter 10.
The corona detector is aimed at insulator to be detected, and insulator generation corona phenomenon produces ultraviolet ray.Ultraviolet ray is by optical filter 2, wherein adopt the screw socket connected mode between optical filter and object lens, can change optical filter easily, according to the visible light intensity of background, the optical filter of using different materials instead can be observed the image of ultraviolet corona more clearly, selects two optical filters altogether for use, and a filter wavelength scope as shown in Figure 2, as can be seen from the figure: the ultraviolet ray transmissivity height, the position, top reaches more than 90%; Wavelength coverage is wide, has almost comprised ultraviolet most energy areas that corona sends in air.The optical filter of another material, the filter wavelength scope is shown as Fig. 3.By Fig. 2 and Fig. 3 as can be seen, use the optical filter of different materials instead after, the ultraviolet ray that sees through and the component ratio of visible light change.
Light is gone into twilight image pipe 4 by optical filter is laggard, this twilight image pipe uses the quartz glass of ultraviolet to be input window, adopt double close-up to focus on (PCM) mode, photocathode 7 is selected S20 type multialkali photocathode face for use, microchannel plate 8 is for double close-up focuses on (PCM) microchannel plate, photo cathode face 9 is selected the photo cathode video screen of aluminizing for use, and output window is the output of optical fiber inverted image.
Described S20 type multialkali photocathode face under optical excitation, runaway electron, electron impact microchannel plate.
Fig. 4 illustrates, the distributing microchannel of diameter 3-6 micron, microchannel plate inside, after the electronics of photocathode effusion enters the microchannel with certain angle of eccentricity, as shown in Figure 5, under the effect of high-voltage electrostatic field, electronics constantly clashes into conduit wall and inspires more electronics, and as Fig. 6, the electronics of output is the increase of how much multiples of electron amount one-tenth of input relatively.
The electron impact fluoroscopic fluorescent material of photo cathode of aluminizing of output forms the fluoroscopic image that intensity is exaggerated on photo cathode.Fluoroscopic image demonstrates the fluoroscopic image that is fit to eye-observation identification after by the optical fiber image inverter inverted image on fibre faceplate.
Can connect recording units such as digital camera in eyepiece 6 backs.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. corona detector, comprise optical filter (2), object lens (3), twilight image pipe (4) and eyepiece (5), wherein twilight image pipe (4) comprises photocathode (7), microchannel plate (8), photo cathode face (9) is characterized in that described optical filter comprises the optical filter of two wavelength, by with object lens between adopt screw socket to be connected, exchange different optical filters in different wavelength range.
2. corona detector according to claim 1 is characterized in that, described twilight image pipe also comprises optical fiber image inverter (10).
3. corona detector according to claim 1 and 2 is characterized in that, described optical filter (2) places the corona detector foremost.
4. corona detector according to claim 1 and 2 is characterized in that, described twilight image pipe (4) focuses on the twilight image pipe for double close-up.
5. corona detector according to claim 1 is characterized in that, described eyepiece is connected to digital camera (6) recording unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202233400U CN201335863Y (en) | 2008-12-12 | 2008-12-12 | Electric corona detection instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202233400U CN201335863Y (en) | 2008-12-12 | 2008-12-12 | Electric corona detection instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201335863Y true CN201335863Y (en) | 2009-10-28 |
Family
ID=41287519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202233400U Expired - Lifetime CN201335863Y (en) | 2008-12-12 | 2008-12-12 | Electric corona detection instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201335863Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706548B (en) * | 2009-11-06 | 2011-08-03 | 宁波大学 | Optical detection device for corona discharge |
| CN102169232A (en) * | 2011-05-23 | 2011-08-31 | 华北电力大学（保定） | Double-spectrum helmet display system |
| CN102207619A (en) * | 2011-05-23 | 2011-10-05 | 华北电力大学（保定） | Double-spectrum helmet display device |
| CN102323520A (en) * | 2011-05-23 | 2012-01-18 | 华北电力大学（保定） | Double-spectrum helmet display |
| CN102323519A (en) * | 2011-05-23 | 2012-01-18 | 华北电力大学（保定） | Dual-spectrum helmet detector |
| CN102323521A (en) * | 2011-05-23 | 2012-01-18 | 华北电力大学（保定） | Helmet display |
| CN103197208A (en) * | 2013-03-21 | 2013-07-10 | 江苏五维电子科技有限公司 | Two-channel solar blind ultraviolet imager capable of conducting field scanning |
-
2008
- 2008-12-12 CN CNU2008202233400U patent/CN201335863Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706548B (en) * | 2009-11-06 | 2011-08-03 | 宁波大学 | Optical detection device for corona discharge |
| CN102169232A (en) * | 2011-05-23 | 2011-08-31 | 华北电力大学（保定） | Double-spectrum helmet display system |
| CN102207619A (en) * | 2011-05-23 | 2011-10-05 | 华北电力大学（保定） | Double-spectrum helmet display device |
| CN102323520A (en) * | 2011-05-23 | 2012-01-18 | 华北电力大学（保定） | Double-spectrum helmet display |
| CN102323519A (en) * | 2011-05-23 | 2012-01-18 | 华北电力大学（保定） | Dual-spectrum helmet detector |
| CN102323521A (en) * | 2011-05-23 | 2012-01-18 | 华北电力大学（保定） | Helmet display |
| CN102207619B (en) * | 2011-05-23 | 2013-02-20 | 华北电力大学（保定） | Double-spectrum helmet display device |
| CN102169232B (en) * | 2011-05-23 | 2013-03-20 | 华北电力大学（保定） | Double-spectrum helmet display system |
| CN102323519B (en) * | 2011-05-23 | 2013-12-04 | 华北电力大学（保定） | Dual-spectrum helmet detector |
| CN102323520B (en) * | 2011-05-23 | 2014-04-16 | 华北电力大学（保定） | Double-spectrum helmet display |
| CN102323521B (en) * | 2011-05-23 | 2014-05-28 | 华北电力大学（保定） | Helmet display |
| CN103197208A (en) * | 2013-03-21 | 2013-07-10 | 江苏五维电子科技有限公司 | Two-channel solar blind ultraviolet imager capable of conducting field scanning |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201335863Y (en) | Electric corona detection instrument | |
| Lindner et al. | Daylight corona discharge imager | |
| CN205384133U (en) | Shimmer image intensifier specifications integrated test device | |
| US20080054166A1 (en) | Detachably coupled image intensifier and image sensor | |
| CN106969833B (en) | A kind of the ultraviolet detector system and its application of big visual field | |
| CN110346120A (en) | The test macro and test method of a kind of strong optical resolution of automatic gate image intensifier and dynamic range | |
| US5886344A (en) | Corona detector with narrow-band optical filter | |
| CA2289882A1 (en) | Corona discharge imaging system for outdoor daylight use | |
| CN1439908A (en) | Projecting device and projecting image display devices | |
| CN107895684A (en) | Ion gun and mass spectrograph | |
| US6150652A (en) | Corona detector with narrow-band optical filter | |
| CN106153306A (en) | A kind of spectral response measurement device outside solar blind UV electricity negative electrode response wave band | |
| CN202651116U (en) | Micro optical image intensifying CCD | |
| CN110275098A (en) | Ultraviolet imager | |
| CN101393053B (en) | Partial gating glimmer detector of image intensifier based on generation III proximity type at normal temperature | |
| CN204594661U (en) | Spectral response measurement device outside a kind of solar blind UV electricity negative electrode response wave band | |
| CN207781533U (en) | Ion source and mass spectrograph | |
| CN103616621A (en) | Vacuum discharge detection device of electronic gun | |
| CN209978876U (en) | Night vision level | |
| CN111756976A (en) | General type shimmer camera lens device | |
| CN2158577Y (en) | Arrangement for enlarging the picture of TV set | |
| CN114023269B (en) | Mini/Micro-LED driving chip of single-chip integrated optical signal receiving module | |
| CN216385987U (en) | Screen brightness colorimeter with variable measurement visual angle | |
| CN220894150U (en) | Solar panel line scanning back detection equipment | |
| JPH0536769B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU BOST INFORMATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHENGDU BOOST TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 610031 B 907, Waltz Plaza, No. seven, flight Road, Sichuan, Chengdu Patentee after: CHENGDU BOOST INFORMATION TECHNOLOGY INC. Address before: 610031 B 907, Waltz Plaza, No. seven, flight Road, Sichuan, Chengdu Patentee before: Chengdu Boost Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091028 |