CN104062568B - A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system - Google Patents
A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 53
- 150000001875 compounds Chemical class 0.000 title claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 90
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 55
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000010409 thin film Substances 0.000 claims description 13
- 239000010408 film Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 28
- 230000035945 sensitivity Effects 0.000 abstract description 14
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 5
- 229920002892 amber Polymers 0.000 description 44
- 238000001514 detection method Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 17
- 238000013461 design Methods 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 239000012943 hotmelt Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000289 photo-effect Toxicity 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The present invention relates to a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system, belong to electric power paper oil insulation local discharge of electrical equipment on-line monitoring technique field.This system narrow-band light source (1), optical filter (2), optical branching device (3) are sequentially connected；It is divided into every light path optical circulator of five light paths, single-mode fiber, fiber external cavity formula enamel amber sensing head to be sequentially connected；Optical circulator is also connected with photodetector (7), amplifier (8)；Amplifier (8) is connected with oscillograph (9).Power supply, makes each device in running order；Compound eye type fiber external cavity formula F-P sensor is placed on the top of insulating bar, rotation insulating bar etc. puts pulse amplitude maximum until the office positioned at middle fiber external cavity formula enamel amber sensing head, and other four is roughly equal；It is the direction of shelf depreciation point.Sensitivity of the present invention is high, good directionality, strong antijamming capability；The keypoint part shelf depreciation direction positioning of power equipment can easily and accurately be carried out.
Description
Technical field
The present invention relates to a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system, belong to electric power paper oil insulation electric
Apparatus local discharge on-line monitoring technique field.
Background technology
Paper oil insulation electrical equipment (based on transformator) partial discharge monitoring has multiple methods both at home and abroad at present, main
Very high frequency(VHF) (VHF) pulse current detection method to be included, hyperfrequency (UHF) Electromagnetic Wave Detection method and piezoelectric transducer ultrasound examination
The detection of method, wherein VHF and UHF detection method is the signal of telecommunication, is easily disturbed by electromagnetic interference signal；Piezoelectric supersonic method detects
Be ultrasonic signal, but sensor is to be attached to the ultrasonic signal that the internal shelf depreciation of testing equipment on device housings produces,
Although being not easily susceptible to the interference of electromagnetic noise, sensitivity is not high.Also there is the inside that piezoelectric transducer is placed on device housings,
Detection shelf depreciation in oil, but due to piezo ultrasound transducers, in oil, detection sensitivity is not high, can not be placed on electricity simultaneously
Position higher position measures so as to detection method is restricted.
The technology of optical method for measuring local discharge of electrical equipment has three kinds of direct detection visible ray methods, faraday's magnetic
Photo effect method and light-supercritical ultrasonics technology.Direct detection visible ray method is suitable only for the high pressure as insulant with transparent dielectric
Electric equipment, be not suitable for using solid dielectric, liquid dielectric as the high-voltage electrical equipment of insulant shelf depreciation
Detection；It is only suitable for the office of the high-voltage electrical equipment of solid shape based on the light line current sensor of Faraday magnetooptical effect principle
Portion's discharge examination, and can not exclude from site space high-intensity magnetic field interference and cannot distinguish from high-voltage electrical equipment earth lead
The electromagnetic pulse signal of upper crosstalk；Light-supercritical ultrasonics technology sensor has small volume, low, interference little, good insulation preformance is lost and prevents
Quick-fried etch-proof advantage and be with a wide range of applications.
Light-supercritical ultrasonics technology includes fiber grating and surveys supersonic vibration method and light interference survey supersonic vibration method fiber optic interferometric method survey
Supersonic vibration has three kinds of methods：Fiber optic Michelson (Michelson) interferometric method, optical fiber mach-Ze Deer interfere (Mach-
Zehnder) method and Fabry Perot (Fabry-Perot) interferometric method.The sensitivity of Michelson method detecting system is not high, and
There is the multipath problem of ultrasonic propagation；Optical fiber mach-Ze Deer interferometric method frequency, demodulation frequency responds not high enough, complex structure,
High to equipment requirements；Optical fiber Fabry Perot rule has structure simply, small volume, high reliability, high sensitivity, the fast time
Response, receives people's universal paying close attention to the advantages of strong antijamming capability.
Optical fiber EFPI (extrinsic Fabry-Perot interferometer, the external cavity type method of studies in China at present
Fabry-Perot interferometric sensor) it is mainly used in the measurement of the gradual amount such as temperature, strain, pressure, be still not suitable for high frequency quick
Partial Discharge Detection.
Fiber external cavity formula enamel amber sensing head, typically, by optical fiber 01, insulating support 02, silicon sleeve pipe 03 and 04 group of silicon thin film piece
Become, between silicon thin film piece 04 and silicon sleeve pipe 03, fixing seal, insulating support 02 are realized by the method for carbon dioxide laser hot melt
And silicon sleeve pipe 03 between, fixing seal is realized by the method for carbon dioxide laser hot melt, and insulating support 02 is led to optical fiber 01
The method crossing carbon dioxide laser hot melt realizes fixing seal, (will ensure in the manufacturing process of sensing head) silicon thin film piece 04
Center and the center alignment of optical fiber.
Content of the invention
The purpose of the present invention is directed to the optical fiber EFPI type sensor of studies in China, and to be mainly used in temperature, strain, pressure etc. slow
The measurement of variable, be still not suitable for the deficiency of the quick Partial Discharge Detection of high frequency it is proposed that a kind of compound eye type optical fiber EFPI local
Course of discharge detecting system.
A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system, this system is divided by narrow-band light source, optical filter, light
Road device, five identical optical circulators, five single-mode fibers, five identical photodetectors, five identical amplifiers, multiple
Eye fiber external cavity formula F-P sensor and oscillograph composition；
Described narrow-band light source is sequentially connected with optical filter and optical branching device；
Described compound eye type fiber external cavity formula F-P sensor is made up of five identical fiber external cavity formula enamel amber sensing heads；
Light after optical filter filters is divided into five light paths by described optical branching device, and every light path is identical with five
One of optical circulator one of optical circulator, five single-mode fibers single-mode fiber, five identical fiber external cavity formula enamel ambers sensings
One of head fiber external cavity formula enamel amber sensing head is sequentially connected；
One of described five identical optical circulators optical circulator also again with one of five identical photodetectors photoelectricity
One of detector, five identical amplifiers amplifier is each sequentially connected one by one；
Five identical amplifiers are all connected with oscillograph.
Described compound eye type fiber external cavity formula F-P sensor is made up of five identical fiber external cavity formula enamel amber sensing heads, and five
Among individual identical fiber external cavity formula enamel amber sensing head, a fiber external cavity formula enamel amber sensing head is located at centre, remaining four light
Fine external cavity type enamel amber sensing head uniformly places surrounding, and is in 45 degree of angles all with intermediate fibres external cavity type enamel amber sensing head.
The present invention can delicately measure high-frequency signal, for partial discharge monitoring.
Beneficial effects of the present invention：
1st, the present invention has sensitivity height, good directionality, the feature of strong antijamming capability, can suppress supersonic vibration multipath
Propagate the impact bringing.And sensor probe is little, can easily be arranged on the weight of power equipment as a kind of point sensor
Point position carries out the detection of shelf depreciation.
2nd, the present invention can delicately measure high-frequency signal, for partial discharge monitoring.
3, present invention firstly provides compound eye type sensor determines shelf depreciation point direction method, devise five probes accordingly
Sensor, can easily and accurately carry out shelf depreciation direction positioning.
Brief description
Fig. 1 is compound eye type optical fiber EFPI shelf depreciation angle detecting system structure diagram.
Fig. 2 is compound eye type fiber external cavity formula F-P sensor (three-dimensional) structural representation.
Fig. 3 is the structural representation of existing single fiber external cavity formula enamel amber sensing head.
Fig. 4 is light intensity and the long relation schematic diagram of film reflectance and chamber.
Fig. 5 is that light intensity peak-to-peak value is maximum interval interior, the relation schematic diagram of light intensity and chamber length.
Fig. 6 is the Partial discharge signal schematic diagram that PD meter, optical fiber EFPI sensor and piezoceramic transducer detect.
When Fig. 7 is unloaded pressurization, PD meter, optical fiber EFPI sensor, the detection signal schematic diagram of piezoelectric ceramics.
Fig. 8 is the piezoceramic transducer dough softening, compound eye type fiber external cavity formula F-P sensor dough softening schematic diagram.Its
In, figure (a) is piezoceramic transducer dough softening schematic diagram；Figure (b) is the compound eye type fiber external cavity formula F-P sensor dough softening
Schematic diagram.
Fig. 9 arranges schematic diagram for head angle.
Figure 10 is 10～90 ° of angular response curve charts of optical fiber EFPI sensor.
Wherein, 1- narrow-band light source, 2- optical filter, 3- optical branching device, 4- optical circulator, 5 single-mode fibers,
Outside 6- fiber external cavity formula enamel amber sensing head, 7- photodetector, 8- amplifier, 9- oscillograph, 10- compound eye type optical fiber
Cavate F-P sensor, 01- optical fiber, 02- insulating support, 03- silicon sleeve pipe, 04- silicon thin film piece.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
Fig. 1 is compound eye type optical fiber EFPI shelf depreciation angle detecting system structure diagram.As shown in figure 1, it is fixed with wavelength
Illustrate as a example the monochromater of 1310nm, a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system, this system structure
For：
1) wavelength is scheduled on the monochromater of 1310nm, is filtrated to get monochromatic wavelength by narrow-band light source 1 by optical fiber filter
Light source.Narrow-band light source 1 selects SLED type light source, and 1310nm fiber band-pass filter selected by wave filter.
2) fiber selection 1310nm single-mode fiber, its center glass core diameter 9um, covering overall diameter 125um.Send out after tested
Now at 1310nm wavelength, the total dispersion of single-mode fiber is zero.From the point of view of the loss characteristic of optical fiber, it is also optical fiber at 1310nm
A low loss window.So selecting light source of the present invention to select at 1310nm.
3) photodetector 7 selects PIN photodiode, has the good linearity of incident light quantity and output current；Response speed
Degree is fast；Output error is little；Output caused by variation of ambient temperature changes little；Make simple；The high feature of reliability.
4) optical fiber circulator is only to allow the incident illumination of certain port from determining port output and reflected light is defeated from another port
The non-reciprocal device going out.Propagate along specified path for guarantee optical fiber, optical circulator 4 need to be used.
5) due to manufacturing technology reason at this stage, the hardware device such as narrow-band light source 1, optical filter 2 is in process
It cannot be guaranteed that parameter is completely the same, signal input also has dispersibility, therefore, for reducing the dispersibility of test result as far as possible,
Need from optical branching device 3.
6) amplifier 8 of the photoelectricity of present invention design adopts three-level to amplify, and wherein every grade amplifying circuit is consistent, series connection
Get up.Single-stage amplifying circuit is as shown in Figure 1.Preamplifier selects OPA637.
7) design of fiber external cavity formula enamel amber sensing head
The design of fiber external cavity formula enamel amber sensing head is the core of compound eye type fiber external cavity formula F-P sensor system.Optical fiber
The structure of external cavity type enamel amber sensing head is as shown in Fig. 2 Fig. 2 is compound eye type fiber external cavity formula F-P sensor (three-dimensional) structural representation
Figure.Can see in Fig. 2 that silicon thin film piece is with silicon sleeve pipe and non-perpendicular, but there is certain angle.Fig. 3 is existing single optical fiber
The structural representation of external cavity type enamel amber sensing head, typically, a fiber external cavity formula enamel amber sensing head is by optical fiber 01, insulating support
02nd, silicon sleeve pipe 03 and silicon thin film piece 04 form, and realize silicon thin film piece 04 and silicon sleeve pipe by the method for carbon dioxide laser hot melt
03, silicon sleeve pipe 03 and the fixing seal between insulating support 02, and insulating support 02 and optical fiber 01, in the making of sensing head
During to ensure the center of silicon thin film piece 04 and the center alignment of optical fiber 01.
To model through emulation, show that angle is bigger, the response frequency of film is lower.The present invention adopts silicon thin film piece 04 and silicon
The vertical structure of sleeve pipe 03.
A) design of silicon thin film piece
Silicon thin film piece adopts quartz film.The design of silicon thin film piece includes the sensitivity of film and the determination of frequency response.Diaphragm
The expression formula of the pressure sensitivity at center is：
The expression formula of minimum natural frequency is：
Found by formula, the pressure sensitivity of diaphragm is directly proportional to the biquadratic of its radius, become anti-with the cube of thickness
Than；And its natural frequency is directly proportional to the thickness of diaphragm, with square being inversely proportional to of effective radius.Sensitivity and frequency response are lances
Shield opposition, therefore take the method for compromise in design, make diaphragm reach optimal sensitivity and Hz-KHz.Selected radius
R=0.9mm, thickness h=30, their highest frequency response and sensitivity are f=101.5kHz, η=0.4155.
B) cavity design of fiber external cavity formula enamel amber sensing head
When change of cavity length amplitude is larger, the light good general of sensor output is with chamber long period variation.For the range of linearity
The fiber external cavity formula enamel amber sensing head of work, it is I that its initial work location requires to work as incident intensity in Q point0(λ), fiber end face is anti-
Rate of penetrating is R1=0.04, film inner surface reflectance is R2, during a length of l in chamber of fiber external cavity formula enamel amber sensing head, according to optics EFPI
The theory of interferometer can show that the output light signal strength of fiber external cavity formula enamel amber sensing head is：
In formula,Optical path difference for two bundle reflected lights.Sign sensor signal quality can be derived by formula (3)
Intensity of reflected light and contrast formula be：
Correction factor η is lost is：
By light source center wavelength 1310nm, n0=1.455 and ω=3.8 μm for people's formula (5).Interference light intensity is imitated
True result is as shown in figure 4, Fig. 4 is light intensity and the long relation schematic diagram of film reflectance and chamber.The reflectance of film is in 0.35th～0.36 area
Between when, the peak-to-peak value of light intensity change is maximum, and it is very favorable for so choosing quiescent point for us.
Light intensity when film reflectance is between 0.348～0.362 is emulated with the relation of chamber length, obtains result such as
Shown in Fig. 5.Fig. 5 is that light intensity peak-to-peak value is maximum interval interior, the relation schematic diagram of light intensity and chamber length.According to analysis, determine that chamber is a length of
When 50.58 μm, light intensity is in an intermediate position, that is, suitable quiescent point Q.
8) compound eye type fiber external cavity formula F-P sensor design
Present invention firstly provides shelf depreciation point direction positioning is carried out using compound eye type Multi probe sensor.Main thought is
Multiple sensing heads are grouped together by different directions, the voltage signal measuring towards the sensing head closest to shelf depreciation direction
Maximum, to determine the direction of shelf depreciation point accordingly.The compound eye type fiber external cavity formula F-P sensor of the present invention is identical by five
Fiber external cavity formula enamel amber sensing head composition.The fiber external cavity formula enamel amber sensing head of five is all designed by identical parameters, has phase
Same performance.One fiber external cavity formula enamel amber sensing head is located at centre, and remaining four fiber external cavity formula enamel amber sensing head is uniformly placed
Surrounding, is in 45 degree of angles all with middle detector head.As shown in Figure 2.(Fig. 2 is compound eye type fiber external cavity formula F-P sensor (three-dimensional)
Structural representation.)
When measuring shelf depreciation, five fiber external cavity formula enamel amber sensing heads all have signal, but direction is put a little closest to office
Fiber external cavity formula enamel amber sensing head signal the strongest；Gradually sensor is turned to at shelf depreciation point, until positioned at middle
Fiber external cavity formula enamel amber sensing head signal is the strongest, and the fiber external cavity formula enamel amber sensing head signal being placed in surrounding is essentially identical, now
It is located at the direction as shelf depreciation point direction of middle fiber external cavity formula enamel amber sensing head.
The above part of the present invention, a kind of present invention compound eye type optical fiber EFPI shelf depreciation angle detecting system unit
Annexation is：
1) building block prepares：The present invention needs SLED type narrow-band light source one, 1310nm fiber band-pass filter one,
1 × 5 optical branching device one, some BNC signal transmssion lines of 5 single-mode fibers of optical circulator 5 amplifiers 5 of some photodetectors
Individual one insulating bar of Five-channel oscillograph one；
2) manufacture fiber external cavity formula enamel amber sensing by the design requirement and parameter of compound eye type fiber external cavity formula F-P sensor
5.
3) assembled by Fig. 1, with single-mode fiber, each device is coupled together.Manufacture the support of five feet, solid respectively
Fixed 5 fiber external cavity formula enamel amber sensing heads, make fiber external cavity formula enamel amber sensing head arrange such as Fig. 6, four fiber external cavities of surrounding
Formula enamel amber sensing head all becomes 45 degree of angles, composition compound eye type fiber external cavity formula enamel amber sensing with intermediate fibres external cavity type enamel amber sensing head
Device.1-5 is numbered to fiber external cavity formula enamel amber sensing head, being in middle fiber external cavity formula enamel amber sensing head and numbering is 1, its
Remaining four fiber external cavity formula enamel amber sensing head number consecutivelies 2-5 in the direction of the clock.Specify No. 1 sensing head is oriented compound eye
The direction of formula fiber external cavity formula F-P sensor；
Narrow-band light source (1) is sequentially connected with optical filter (2) and optical branching device (3)；Described compound eye type fiber external cavity formula enamel
Amber sensor (10) is made up of five identicals fiber external cavity formula enamel amber sensing head (6)；Described optical branching device (3) will be filtered through light
Light after ripple device (2) filters is divided into five light paths, every light path and one of five identical optical circulators (4) optical circulator,
One of one of five single-mode fibers (5) single-mode fiber, five identicals fiber external cavity formula enamel amber sensing head (6) fiber external cavity formula enamel
Amber sensing head is sequentially connected；One of described five identical optical circulators (4) optical circulator also again with five identical light electrical resistivity surveys
Survey one of device (7) one of photodetector (7), five identical amplifiers (8) amplifier (8) to be each sequentially connected one by one；Five
Individual identical amplifier (8) is all connected with oscillograph (9).
[performance verification experiment]:
The performance of the sensing head of the present invention can be tested by the detection means of single-path optical fiber EFPI shown in Fig. 1.In reality
Test room setting paper oil insulation defect partial discharge model, by pulse current method PD meter detecting system, piezoceramic transducer
System and single-path optical fiber EFPI detecting system measure local discharge signal respectively simultaneously, and Fig. 6 is PD meter, optical fiber EFPI sensor
With the Partial discharge signal schematic diagram of piezoceramic transducer detection, result as shown in fig. 7, when Fig. 7 is unloaded pressurization, PD meter, light
Fine EFPI sensor, the detection signal schematic diagram of piezoelectric ceramics.It can be seen that the sensing head of present invention design being capable of detection office well
Portion's discharge signal.
The high-field electrode needle electrode of partial discharge model is taken off, other conditions are constant, unloaded pressurization, be forced into
17kV, the signal detecting is as shown in Figure 7.By Fig. 7, can obtain, after zero load is pressurized to 17kV, in environment, there is electromagnetism
Interference or testing transformer produce transaudient electromagnetic interference signal, and PD meter detects discharge signal, and optical fiber ultrasonic sensor
Corresponding therewith with piezoceramic transducer no ultrasonic signal, this also illustrates that ultrasonic sensor has good anti-electromagnetism and does
Disturb ability, and optical fiber EFPI sensor is compared piezoceramic transducer and had more preferable capacity of resisting disturbance.
The ultrasound wave response amplitude of the optical fiber EFPI sensor under the different distance obtaining is passed with optical fiber EFPI under 15cm
Sensor ultrasound wave response amplitude seeks ratio, then counts each and averages apart from lower 50 groups of data, and same method passes to piezoelectric ceramics
The signal that sensor detects is processed, and can get dough softening curve as shown in Figure 8.Fig. 8 be the piezoceramic transducer dough softening,
Compound eye type fiber external cavity formula F-P sensor dough softening schematic diagram.Wherein, figure (a) is illustrated for the piezoceramic transducer dough softening
Figure；Figure (b) is compound eye type fiber external cavity formula F-P sensor dough softening schematic diagram.The piezoelectric ceramics dough softening can be seen relative to light
The decay of fine EFPI sensor is very fast, is substantially not detectable local discharge signal at 30cm, and optical fiber EFPI sensor away from
Put from office and be still able to detect that larger discharge signal with a distance from the 75cm of source, this proves optical fiber EFPI transducer sensitivity relatively
Height, can detect faint local discharge signal.
Optical fiber EFPI sensing head detection angles performance test：One sensing head is just being played a game to be put a little, second identical parameters
Sensing head become with it angle α place, model as shown in figure 9, Fig. 9 be head angle setting schematic diagram.Obtain fiber external cavity formula
The shelf depreciation amplitude of enamel amber sensing head is as shown in Figure 10 with the response curve of angle change.Figure 10 is optical fiber EFPI sensor 10
～90 ° of angular response curve charts.It can be seen that optical fiber external cavity type enamel amber sensing head is bigger towards deviateing shelf depreciation orientation angle, measure
Signal amplitude less, but how tube angulation is not placed, and can measure signal all the time surveying in the distance.
Present invention firstly provides compound eye type sensor determines shelf depreciation point direction, and devise five probe sensors, energy
Easily and accurately carry out shelf depreciation direction positioning.The present invention has sensitivity height, good directionality, the spy of strong antijamming capability
Point, can suppress the impact that supersonic vibration multipath propagation brings.And sensor probe is little, can as a kind of point sensor,
The keypoint part being easily arranged on power equipment carries out the detection of shelf depreciation.The present invention can delicately measure high frequency letter
Number, for partial discharge monitoring.
The present invention is not limited to above-mentioned preferred forms, and anyone can show that under the enlightenment of the present invention other are various
The product of form, however, making any change in its shape or structure, every have skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (7)
1. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system it is characterised in that this system by narrow-band light source (1),
Optical filter (2), optical branching device (3), five identical optical circulators (4), five single-mode fibers (5), five identical photoelectricity
Detector (7), five identical amplifiers (8), compound eye type fiber external cavity formula F-P sensor (10) and oscillograph (9) composition；
Described narrow-band light source (1) is sequentially connected with optical filter (2) and optical branching device (3)；
Described compound eye type fiber external cavity formula F-P sensor (10) is by five identical fiber external cavity formula enamel amber sensing head (6) groups
Become；
Light after optical filter (2) filters is divided into five light paths, every light path and five phases by described optical branching device (3)
One of same optical circulator (4) one of optical circulator, five single-mode fibers (5) single-mode fiber, five identical fiber external cavity formulas
One of enamel amber sensing head (6) fiber external cavity formula enamel amber sensing head is sequentially connected；
One of described five identical optical circulators (4) optical circulator also again with one of five identical photodetectors (7) light
One of electric explorer (7), five identical amplifiers (8) amplifier (8) is each sequentially connected one by one；
Five identical amplifiers (8) are all connected with oscillograph (9)；
One among described (10) five identicals fiber external cavity formula enamel amber sensing head (6) of compound eye type fiber external cavity formula F-P sensor
Individual fiber external cavity formula enamel amber sensing head (6) is located at centre, and remaining four fiber external cavity formula enamel amber sensing head (6) uniformly places four
Week, and be in 45 degree of angles all with intermediate fibres external cavity type enamel amber sensing head (6).
2. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system according to claim 1 is it is characterised in that institute
State the monochromater that narrow-band light source (1) is that SLED type wavelength is 1310nm.
3. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system according to claim 1 is it is characterised in that institute
Stating optical filter (2) is 1310nm fiber band-pass filter.
4. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system according to claim 3 is it is characterised in that institute
Stating optical fiber is 1310nm single-mode fiber, its center glass core diameter 9um, covering overall diameter 125um.
5. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system according to claim 1 is it is characterised in that institute
Stating fiber external cavity formula enamel amber sensing head (6) silicon thin film piece is quartz film, described quartz film radius R=0.9mm, thickness h=30 μm.
6. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system according to claim 1 is it is characterised in that institute
State a length of 50.58 μm of the cavity body of fiber external cavity formula enamel amber sensing head (6).
7. a kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system according to claim 1 is it is characterised in that institute
Stating photodetector (7) is PIN photodiode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323545.6A CN104062568B (en) | 2014-07-08 | 2014-07-08 | A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system |
| PCT/CN2015/082274 WO2016004821A1 (en) | 2014-07-08 | 2015-06-25 | System for detecting partial discharge direction of compound-eye-type optical fiber efpi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323545.6A CN104062568B (en) | 2014-07-08 | 2014-07-08 | A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104062568A CN104062568A (en) | 2014-09-24 |
| CN104062568B true CN104062568B (en) | 2017-03-01 |
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| CN201410323545.6A Active CN104062568B (en) | 2014-07-08 | 2014-07-08 | A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system |
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| CN104820174B (en) * | 2015-04-27 | 2018-06-19 | 国家电网公司 | The partial discharge of transformer detecting system of fiber external cavity formula F-P sensor array |
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| US6264610B1 (en) * | 1999-05-05 | 2001-07-24 | The University Of Connecticut | Combined ultrasound and near infrared diffused light imaging system |
| US6543288B1 (en) * | 1998-11-04 | 2003-04-08 | National Research Council Of Canada | Laser-ultrasonic measurement of elastic properties of a thin sheet and of tension applied thereon |
| CN101551434A (en) * | 2009-05-13 | 2009-10-07 | 中南大学 | Transformer partial discharge positioning method base on ultra high frequency detection technology |
| CN101762318A (en) * | 2010-01-21 | 2010-06-30 | 上海大学 | Optical fiber extrinsic Fabry-Perot interference ultrasonic sensing and detection device |
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| CN104062569B (en) * | 2014-07-08 | 2017-04-05 | 国家电网公司 | A kind of shelf depreciation direction detection method of compound eye type optical fiber EFPI |
| CN104062568B (en) * | 2014-07-08 | 2017-03-01 | 国家电网公司 | A kind of compound eye type optical fiber EFPI shelf depreciation angle detecting system |
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| US6543288B1 (en) * | 1998-11-04 | 2003-04-08 | National Research Council Of Canada | Laser-ultrasonic measurement of elastic properties of a thin sheet and of tension applied thereon |
| US6264610B1 (en) * | 1999-05-05 | 2001-07-24 | The University Of Connecticut | Combined ultrasound and near infrared diffused light imaging system |
| CN101551434A (en) * | 2009-05-13 | 2009-10-07 | 中南大学 | Transformer partial discharge positioning method base on ultra high frequency detection technology |
| CN101762318A (en) * | 2010-01-21 | 2010-06-30 | 上海大学 | Optical fiber extrinsic Fabry-Perot interference ultrasonic sensing and detection device |
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Address after: 225012 No. 179 Weiyang Road, Yangzhou City, Jiangsu Province Co-patentee after: State Grid Jiangsu Electric Power Co., Ltd. Electric Power Research Institute Patentee after: Yangzhou power supply branch, Jiangsu Electric Power Co., Ltd. Co-patentee after: North China Electric Power University Co-patentee after: State Grid Corporation of China Co-patentee after: State Grid Jiangsu Electric Power Co., Ltd. Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: Jiangsu Electric Power Company Patentee before: State Grid Corporation of China Co-patentee before: Yangzhou Power Supply Company of Jiangsu Electric Power Company Co-patentee before: North China Electric Power University Co-patentee before: Electric Power Research Institute of Jiangsu Electric Power Company |
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Inventor after: Zhang Chunyan Inventor after: Gao Chaofei Inventor after: Teng Jun Inventor after: Zhang Lei Inventor after: Tao Fengbo Inventor after: Lu Yuncai Inventor after: Sheng Ji Inventor after: Wang Wei Inventor after: Tao Jiagui Inventor after: Lu Shengzhi Inventor after: Li Peipei Inventor after: Zhang Yingyue Inventor after: Wang Mingmin Inventor after: Zhou Zhicheng Inventor before: Zhang Yingyue Inventor before: Du Jiazhen Inventor before: Sheng Ji Inventor before: Tao Fengbo Inventor before: Lu Yuncai Inventor before: Wang Mingmin Inventor before: Zhang Chunyan Inventor before: Wang Wei Inventor before: Zhou Zhicheng Inventor before: He Dongxin Inventor before: Teng Jun Inventor before: Li Fuping Inventor before: Zhang Lei |