CN102072703A - Optical measurement device and method for separation of GIS (Gas Insulated Switchgear) - Google Patents
Optical measurement device and method for separation of GIS (Gas Insulated Switchgear) Download PDFInfo
- Publication number
- CN102072703A CN102072703A CN 201010531820 CN201010531820A CN102072703A CN 102072703 A CN102072703 A CN 102072703A CN 201010531820 CN201010531820 CN 201010531820 CN 201010531820 A CN201010531820 A CN 201010531820A CN 102072703 A CN102072703 A CN 102072703A
- Authority
- CN
- China
- Prior art keywords
- laser
- disconnector
- voltage signal
- displacement
- position sensor
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 40
- 238000005259 measurement Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 19
- 238000000926 separation method Methods 0.000 title abstract 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 32
- 230000005622 photoelectricity Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011326 mechanical measurement Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 101000736368 Homo sapiens PH and SEC7 domain-containing protein 4 Proteins 0.000 description 1
- 102100036232 PH and SEC7 domain-containing protein 4 Human genes 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000013214 routine measurement Methods 0.000 description 1
Images
Abstract
The invention relates to a measurement device for separation of a GIS (Gas Insulated Switchgear), which comprises a laser source, a driving circuit for driving the laser source, an optical focusing device, a PSD (Position Sensitive Detector), a photoelectric adapter circuit and a data recording and processing device, wherein the laser source is arranged on a movably conducive tube of the insulated switchgear and capable of moving with the displacement of the conductive tube; the optical focusing device is arranged on the casing of the insulated switchgear and used for enabling the laser emitted from the laser source to converge; the PSD is used for converting light signals in a position corresponding to the laser subjected to the converging of the optical focusing device to current signals; the photoelectric adapter circuit is used for converting the current signals outputted from the PSD to voltage signals proportional to the displacement distance; and the data recording and processing device is used for recording the voltage signals and calculating the separation of the GIS according to the voltage signals. The invention indicates the displacement of a movable conductive contact through the laser emitted from the laser source, and shortens the displacement range of the laser on the PSD surface by using the optical focusing device, thereby facilitating the matching with the measurement range of the PSD, calculating the displacement of the movable conductive tube contact by measuring the laser position through the PSD, and achieving the measurement of the separation of the GIS.
Description
Technical field
The present invention relates to the high voltage measuring technical field, relate in particular to optical measuring device and measuring method that a kind of GIS disconnector is opened distance.
Background technology
The routine measurement method that the disconnector that GIS manufacturer provides is at present opened distance is a Mechanical Method.Because the disconnector reasons in structure, displacement transducer can only be connected with contact by operating mechanism or gear train etc., belongs to a kind of indirect measurement method.Because non-rigid connection the between operating mechanism or gear train and the isolation switch contact, there are tolerance clearance, mechanically deform and wearing and tearing etc., therefore mechanical measurement can only probably be measured out distance, and measuring error reaches 1-2mm, can't satisfy more high precision and open apart from Testing requirement.
Summary of the invention
The objective of the invention is to propose measurement mechanism and the measuring method that a kind of disconnector is opened distance, can reduce the measuring error that disconnector is opened distance.
For achieving the above object, the invention provides the measurement mechanism that a kind of disconnector is opened distance, comprising:
Lasing light emitter is installed on the moving conductive pipe of described disconnector, can move and moves with described moving conductive pipe;
Drive the driving circuit of described lasing light emitter;
Optical focusing device is installed on the shell of described disconnector, is used to converge the laser that described lasing light emitter sends;
Photoelectrical position sensor (Position Sensitive Detector, be called for short PSD), the light signal that is used for the position of the laser correspondence that will converge through described optical focusing device converts current signal to;
The photoelectricity adapter circuit is used for current signal with the output of described photoelectrical position sensor and converts to and the opening apart from proportional voltage signal of described disconnector;
Data recording and treating apparatus are used to write down described voltage signal, and calculate disconnector according to described voltage signal and open distance.
For achieving the above object, the invention provides and a kind ofly adopt aforementioned measurement mechanism to measure the method that disconnector is opened distance, comprising:
The light signal of the position of the laser correspondence that photoelectrical position sensor will converge through optical focusing device converts current signal to;
The photoelectricity adapter circuit converts the current signal of described photoelectrical position sensor output and the proportional voltage signal of displacement to;
Data recording and treating apparatus write down described voltage signal, and calculate disconnector according to described voltage signal and open distance.
Based on technique scheme, the present invention is installed in lasing light emitter on the moving conductive pipe, indicate the displacement of moving conductive pipe contact by lasing light emitter emission laser, and utilize optical focusing device to dwindle the moving range of laser on the PSD surface, so that the measurement range of PSD is complementary, set out the displacement of contact tube contact by PSD Laser Measurement position calculation, realize the measurement that disconnector is opened distance, the employing optical mode is measured, and measuring accuracy is higher, and the actual measurement maximum error is lower than 0.5mm.
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 opens the principle schematic of the optical measuring device embodiment of distance for GIS disconnector of the present invention.
Fig. 2 opens the structural representation of an embodiment of the optical measuring device of distance for GIS disconnector of the present invention.
Fig. 3 opens the light path synoptic diagram of the optical measuring device embodiment of distance for GIS disconnector of the present invention.
Fig. 4 is the one-piece construction synoptic diagram of GIS disconnector among the present invention.
Fig. 5 opens the scheme of installation of lasing light emitter among the optical measuring device embodiment of distance for GIS disconnector of the present invention.
Fig. 6 opens the principle schematic of optical focusing device among the optical measuring device embodiment of distance for GIS disconnector of the present invention.
Fig. 7 is the schematic flow sheet of an embodiment of measuring method of the present invention.
Fig. 8 is the measuring error curve of GIS measurement mechanism method embodiment of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
At first the measuring principle that GIS disconnector of the present invention is driven the optical measuring device of distance describes.As shown in Figure 1, open the principle schematic of the optical measuring device embodiment of distance for GIS disconnector of the present invention.In the present embodiment, measurement mechanism comprises lasing light emitter 1, driving circuit 2, optical focusing device 3, PSD 4, photoelectricity adapter circuit 5 and data recording and treating apparatus 6.The lasing light emitter 1 of lasing light emitter 1 measurement mechanism is installed on the moving conductive pipe 12 of disconnector, to optical focusing device 3 emission laser, laser shines on the PSD4 after optical focusing device 3 converges, PSD 4 converts the light signal of laser institute irradiation position to current signal, photoelectricity adapter circuit 5 converts the current signal of PSD 4 outputs and the proportional voltage signal of displacement to, calculates disconnector by data recording and treating apparatus 6 according to voltage signal again and opens distance.
Be example with a concrete 252kV GIS below, technical scheme of the present invention is specifically described.
As shown in Figure 2, open the structural representation of an embodiment of the optical measuring device of distance for GIS disconnector of the present invention, disconnector comprises static contact 11 and moving conductive pipe 12, and the lasing light emitter 1 of measurement mechanism is installed on the moving conductive pipe 12 of disconnector, but servo-actuated contact tube 12 moves and moves.Optical focusing device 3 is installed on the shell of disconnector, comprises fixed support 31 and planoconvex lens 32, and planoconvex lens 32 is fixed on the fixed support 31.Fixed support 31 is hollow tube-shape, and planoconvex lens 32 is fixed on an end of fixed support 31, can fix by collar.The light-sensitive surface of PSD 4 is towards planoconvex lens 32, and the firm banking 41 of PSD 4 is fixed on the other end of fixed support 31.The mode that fixed form can adopt nut 27 to screw.Between firm banking 41 and fixed support 31, can add pad 42, regulate the position of PSD by pad 42.
As shown in Figure 3, open the light path synoptic diagram of the optical measuring device embodiment of distance for GIS disconnector of the present invention.Fixed support 31 is installed on the flange of view window 33 of disconnector, and the laser that lasing light emitter 1 is sent vertically is mapped to planoconvex lens 32 by view window 33.Lasing light emitter 1 on the moving conductive pipe 12 sends laser 7, and this laser 7 penetrates perpendicular to the view window level, and when this laser 7 was mapped on the planoconvex lens 32, this laser 7 refraction took place and changes light path, and the laser 7 after the change light path is radiated on the sensitive surface of PSD 4.The laser 7 that planoconvex lens 32 sends lasing light emitter 1 is effectively being opened in scope and can both as long as laser impinges upon in effective sensitive volume of PSD, can both obtained electric signal accurately through the PSD adaptation processing by reflecting on the sensitive surface that is radiated at PSD 4 at last.
As shown in Figure 4, the one-piece construction synoptic diagram of GIS disconnector among the present invention.As can be seen, stayed a view window 33 in the side of disconnector from the figure, laser is penetrated in view window 33, by the position measurement contact position of Laser Measurement, entire measuring device is fixed on the flange of view window 33.
As shown in Figure 5, GIS disconnector of the present invention is opened the scheme of installation of lasing light emitter among the optical measuring device embodiment of distance.In the moving conductive pipe 12 close ends of static contact 11 1 sides of disconnector, a lasing light emitter 1 is installed, can be launched laser.Powered battery can be laid in lasing light emitter 1 back.Lasing light emitter 1 servo-actuated contact tube 12 moves.Securing cover plate 21 is the fixed mounts in support and fixed laser source 1, and can seal the lasing light emitter 1 and the lasing light emitter battery 24 of moving conductive pipe 12 the insides.Set bolt 22 is fixed on securing cover plate 21 on the moving conductive pipe 12.Lasing light emitter 1 is installed in lasing light emitter holder 23 the insides, and bolt 25 fuses lasing light emitter holder 23 and securing cover plate 21.Securing cover plate 21, set bolt 22, lasing light emitter holder 23 and the bolt 25 common lasing light emitter stationary installations of forming are connected and fixed lasing light emitter 1 and moving conductive pipe 12, and position and direction that can horizontal and vertical adjusting lasing light emitter 1 guarantee that laser vertical that lasing light emitter 1 sends is in the incident of view window plane.
As shown in Figure 6, GIS disconnector of the present invention is opened the principle schematic of optical focusing device among the optical measuring device embodiment of distance.Make the plane parallel of its sensitive surface and planoconvex lens by regulating PSD, and the center of the center of PSD and planoconvex lens is on same center line.If when ignoring planoconvex lens thickness, then can be similar to think that luminous point moves on planoconvex lens apart from S
AbWith luminous point by planoconvex lens converge that the back moves on PSD apart from S
CdBe proportional, the physical relationship formula is k=S
Ab/ f=S
Cd/ V
Cd, wherein f is the focal length of planoconvex lens, V
CdIt is the distance that PSD arrives focus.Because disconnector is opened distance may be bigger, and the measurement range of PSD is limited, therefore be provided with and dwindle moving range after optical focusing device converges laser, could mate with the PSD measurement range, realize that the disconnector standard-sized sheet is apart from Testing requirement.
As shown in Figure 7, be the schematic flow sheet of an embodiment of measuring method of the present invention.In the present embodiment, measuring flow process specifically comprises:
The light signal of the position of the laser correspondence that step 101, photoelectrical position sensor will converge through optical focusing device converts current signal to;
Step 102, photoelectricity adapter circuit convert the current signal of described photoelectrical position sensor output and the proportional voltage signal of displacement to;
Step 103, data recording and treating apparatus write down described voltage signal, and calculate disconnector according to described voltage signal and open distance.
Wherein, in the step 101, when disconnector switch one time, the position follower contact tube of lasing light emitter moves, the laser that lasing light emitter sent is mapped to the sensitive surface of PSD after optical focusing device focuses on, and laser moves and the proportional distance of lasing light emitter displacement at sensitive surface at the luminous point of sensitive surface projection.If lasing light emitter displacement is expressed as S
Ab, then luminous point displacement is expressed as S on the sensitive surface
Cd, wherein this ratio satisfies relational expression k=S
Ab/ S
Cd=f/V
Cd, V wherein
CdExpression PSD can deduct the distance acquisition of planoconvex lens to PSD, this V by focal length to the distance of focus
CdCan be by the pad adjustment, f represents the focal length of planoconvex lens.PSD gathers the starting point coordinate (x that luminous point moves
1, y
1) and terminal point coordinate (x
2, y
2), and convert current signal to.
In step 102, the photoelectricity adapter circuit converts the current signal of photoelectrical position sensor output and starting point coordinate and the corresponding respectively voltage signal of terminal point coordinate to, and voltage signal and displacement are proportional.The photoelectricity adapter circuit is with starting point coordinate (x
1, y
1) and terminal point coordinate (x
2, y
2) current signal convert voltage signal V to
X0, V
Y0, V
x, V
yVoltage signal V
X0, V
Y0, V
x, V
yWith the coordinate starting point coordinate (x on the PSD
1, y
1) and terminal point coordinate (x
2, y
2) proportional relation, for example the corresponding 0.5V of 1mm is expressed as coefficient a=2.
In step 103, described data recording and treating apparatus write down described voltage signal, and the ratio of corresponding voltage signal, voltage signal and displacement and luminous point displacement that described sensitive surface throws and the proportional meter of lasing light emitter displacement are calculated the distance of opening of described disconnector respectively according to described starting point coordinate and terminal point coordinate.
According to the parametric representation of front, the ratio of voltage signal and displacement can be made as a, and the luminous point displacement of sensitive surface projection and the ratio of lasing light emitter displacement can be made as k, for convenience of calculation and raising measuring accuracy, can make luminous point when sensitive surface moves, V by regulating the angle of PSD
yBe output as 0 or steady state value, so just can be with V
xVariation determine the scope that luminous point moves, after all devices are all adjusted, can be according to formula S
Kj=k
*(V
x-V
0)
*A calculates disconnector and opens apart from S
Kj, coefficient k=S wherein
Ab/ S
Cd=f/V
Cd, this numerical value can carry out timing calculating just and obtain when installing and measuring device, and wherein a represents the proportionate relationship between luminous point displacement and the voltage signal, also can obtain in timing calculating just.
Pass through aforesaid operations, the present invention utilizes lasing light emitter emission laser to indicate the displacement of moving conductive pipe contact, and utilize optical focusing device to dwindle the moving range of laser on the PSD surface, so that the measurement range of PSD is complementary, set out the displacement of contact tube contact by PSD Laser Measurement position calculation, realize the measurement that disconnector is opened distance, adopt optical mode to measure, measuring accuracy is higher.
As shown in Figure 8, be the measuring error curve of GIS measurement mechanism method embodiment of the present invention.As can be seen from Figure 8, PSD is opening in scope (0-50mm) of being concerned about, the linearity is very good.PSD output and the actual ratio of opening distance are k=-0.2657V/mm.Light path system is more stable, and is very little to the imaging influence owing to the distortion that external shock, temperature variation etc. cause, so this value is believable.
Intercept is D=4.972V, and this value may change owing to influences such as external shock, temperature variation, thus when for a long time need not or environmental baseline when obviously changing, need to demarcate again.Under equal conditions, 8 groups of measurements have been carried out again.In measuring process, according to the measuring principle of system, possible error pattern mainly comprises:
1. systematic error: mainly be herein channel oscilloscope biasing, amplifier zero partially, the two can merge, and systematic error mainly shows as the fixedly variation of intercept D, can eliminate by demarcating.
2. stochastic error: the error of PSD output is arranged, the error of computing herein.Actual open apart from funtcional relationship the unknown, x and the I of light spot position x
1And I
2Funtcional relationship the unknown, only know measured value x
*With I
1And I
2Funtcional relationship, therefore be difficult to determine the distribution function of stochastic error.Here guestimate stochastic error satisfies normal distribution.Like this, actual value will be approximate by arithmetic mean value μ, and error will be approximate by standard deviation sigma.
3. human error: because carelessness, misoperation etc. cause.Infer that by measuring principle light spot position x difference does not influence standard deviation sigma, and just influences average μ.And therefore data volume and little adopts following way basis of calculation difference σ:
Calculate down average μ of (5 distances, 8 data of each distance) of each distance, and measured value is deducted corresponding μ, obtain deviation, these deviations should Normal Distribution, and its average is 0, and standard deviation is σ.Like this, the sample size increase is 40.
As calculated, standard deviation sigma is 0.1393.The 5th data under the 10mm, deviation is bigger, has reached 0.4371, and greater than 3 σ, according to 3 σ principles, this measured value belongs to fault to be caused, and should reject.
After rejecting human error, recomputate, obtain σ=0.1246, what this value was corresponding opens apart from being 0.47mm, and therefore, the actual measurement maximum error of opening distance is lower than 0.5mm, is better than the measuring error that mechanical measurement is opened distance.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (9)
1. a disconnector is driven the measurement mechanism of distance, comprising:
Lasing light emitter is installed on the moving conductive pipe of described disconnector, can move and moves with described moving conductive pipe;
Drive the driving circuit of described lasing light emitter;
Optical focusing device is installed on the shell of described disconnector, is used to converge the laser that described lasing light emitter sends;
Photoelectrical position sensor, the light signal that is used for the position of the laser correspondence that will converge through described optical focusing device converts current signal to;
The photoelectricity adapter circuit is used for the current signal of described photoelectrical position sensor output is converted to and the proportional voltage signal of displacement;
Data recording and treating apparatus are used to write down described voltage signal, and calculate disconnector according to described voltage signal and open distance.
2. measurement mechanism according to claim 1, wherein, described lasing light emitter is installed in the end of described moving conductive pipe near the first side of stationary contact.
3. measurement mechanism according to claim 1, wherein, described optical focusing device comprises fixed support and planoconvex lens, described planoconvex lens is fixed on the described fixed support, described fixed support is installed on the flange of view window of described disconnector, and the laser that described lasing light emitter is sent vertically is mapped to described planoconvex lens by described view window.
4. measurement mechanism according to claim 3, wherein, described fixed support is hollow tube-shape, described planoconvex lens is fixed on a described support bracket fastened end, the light-sensitive surface of described photoelectrical position sensor is towards described planoconvex lens, and the firm banking of described photoelectrical position sensor is fixed on the described support bracket fastened other end.
5. measurement mechanism according to claim 4 wherein, also comprises pad between the firm banking of described photoelectrical position sensor and the described fixed support, is used to regulate the position of described photoelectrical position sensor.
6. one kind is adopted the arbitrary described measurement mechanism of claim 1～5 to measure the method that disconnector is opened distance, comprising:
The light signal of the position of the laser correspondence that photoelectrical position sensor will converge through optical focusing device converts current signal to;
The photoelectricity adapter circuit converts the current signal of described photoelectrical position sensor output and the proportional voltage signal of displacement to;
Data recording and treating apparatus write down described voltage signal, and calculate disconnector according to described voltage signal and open distance.
7. method according to claim 6, the operation that the light signal of the position of the laser correspondence that wherein said photoelectrical position sensor will converge through optical focusing device converts current signal to is specially:
When described disconnector switch one time, the position follower contact tube of lasing light emitter moves;
The laser that described lasing light emitter sends is mapped to the sensitive surface of described photoelectrical position sensor after described optical focusing device focuses on, and described laser moves and the proportional distance of lasing light emitter displacement at described sensitive surface at the luminous point of described sensitive surface projection;
Described photoelectrical position sensor is gathered starting point coordinate and the terminal point coordinate that described luminous point moves, and converts current signal to.
8. method according to claim 7, wherein said photoelectricity adapter circuit is specially the operation that the current signal of described photoelectrical position sensor output converts to the proportional voltage signal of displacement:
Described photoelectricity adapter circuit converts the current signal of described photoelectrical position sensor output and described starting point coordinate and the corresponding respectively voltage signal of terminal point coordinate to, and described voltage signal and displacement are proportional.
9. method according to claim 8, wherein said data recording and treating apparatus write down described voltage signal, and calculate disconnector according to described voltage signal and open the operation of distance and be specially:
Described data recording and treating apparatus write down described voltage signal, and the ratio of corresponding voltage signal, described voltage signal and displacement and luminous point displacement that described sensitive surface throws and the proportional meter of lasing light emitter displacement are calculated the distance of opening of described disconnector respectively according to described starting point coordinate and terminal point coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531820A CN102072703B (en) | 2010-11-04 | 2010-11-04 | Optical measurement device and method for separation of GIS (Gas Insulated Switchgear) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531820A CN102072703B (en) | 2010-11-04 | 2010-11-04 | Optical measurement device and method for separation of GIS (Gas Insulated Switchgear) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102072703A true CN102072703A (en) | 2011-05-25 |
| CN102072703B CN102072703B (en) | 2012-10-03 |
Family
ID=44031340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010531820A Active CN102072703B (en) | 2010-11-04 | 2010-11-04 | Optical measurement device and method for separation of GIS (Gas Insulated Switchgear) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102072703B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050189325A1 (en) * | 2004-02-27 | 2005-09-01 | Abb Technology Ag | Insulated earthing switch for gas-insulated switchgear assemblies |
| CN101064220A (en) * | 2006-04-24 | 2007-10-31 | 河南平高电气股份有限公司 | Quick electric operation mechanism |
| US20070279610A1 (en) * | 2006-06-05 | 2007-12-06 | Nokia Corporation | Method and device for position sensing of an optical component in an imaging system |
| CN201170995Y (en) * | 2008-02-20 | 2008-12-24 | 江苏省如高高压电器有限公司 | Directly-moving type isolation switch |
| CN101527431A (en) * | 2009-04-13 | 2009-09-09 | 中国西电电气股份有限公司 | Supervoltage/extra-high voltage GIS isolating device |
-
2010
- 2010-11-04 CN CN201010531820A patent/CN102072703B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050189325A1 (en) * | 2004-02-27 | 2005-09-01 | Abb Technology Ag | Insulated earthing switch for gas-insulated switchgear assemblies |
| CN101064220A (en) * | 2006-04-24 | 2007-10-31 | 河南平高电气股份有限公司 | Quick electric operation mechanism |
| US20070279610A1 (en) * | 2006-06-05 | 2007-12-06 | Nokia Corporation | Method and device for position sensing of an optical component in an imaging system |
| CN201170995Y (en) * | 2008-02-20 | 2008-12-24 | 江苏省如高高压电器有限公司 | Directly-moving type isolation switch |
| CN101527431A (en) * | 2009-04-13 | 2009-09-09 | 中国西电电气股份有限公司 | Supervoltage/extra-high voltage GIS isolating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102072703B (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2838683A (en) | Curve follower | |
| CN102147234B (en) | Laser triangulation sensor | |
| CA1227057A (en) | Fused silica diaphragm module for high temperature pressure transducers | |
| JP2012002703A (en) | Displacement detection device | |
| US3065354A (en) | Liquid level sensor | |
| CN105675633A (en) | Calibration device of X-ray framing camera | |
| CN102072703B (en) | Optical measurement device and method for separation of GIS (Gas Insulated Switchgear) | |
| CN103940341A (en) | Displacement and inclination angle integrated test instrument | |
| CN205049267U (en) | Non -contact pressure measurement | |
| CN105222930A (en) | Contactless pressure-detecting device and detection method thereof | |
| CN202676592U (en) | Optical system for smoke pattern measuring device | |
| CN110646750A (en) | Magnetic field detection system and method based on electron spin reflection cancellation | |
| CN101493376B (en) | Pentaprism combination ultralong focal-length measurement method and apparatus | |
| CN104238110A (en) | Parallel light tube wave-front aberration pre-compensation device based on adaptive optics | |
| CN201194068Y (en) | Photo-etching machine exposure system | |
| CN116336995A (en) | Small-angle inspection device and small-angle inspection method based on auto-collimation principle | |
| CN103837241A (en) | Laser pulse waveform meter | |
| CN201229295Y (en) | Gas measuring device | |
| WO2020125305A1 (en) | Series-connected integrated temperature and vibration sensor employing blazed grating and fiber bragg grating optical fiber | |
| CN219390851U (en) | Angle measuring device and quick reflector | |
| CN103135230A (en) | Optical system of photoelectrical pyrostat | |
| KR970011144B1 (en) | Sensor using semiconductor laser | |
| CN104977082A (en) | Ultraviolet spectrometer spectral resolution detection device and method | |
| CN220853858U (en) | Optical power detection device and optical power detection system | |
| RU173567U1 (en) | Optical pressure meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |