CN106199124A - Fiber-current sensor light path system - Google Patents
Fiber-current sensor light path system Download PDFInfo
- Publication number
- CN106199124A CN106199124A CN201610472455.2A CN201610472455A CN106199124A CN 106199124 A CN106199124 A CN 106199124A CN 201610472455 A CN201610472455 A CN 201610472455A CN 106199124 A CN106199124 A CN 106199124A
- Authority
- CN
- China
- Prior art keywords
- light
- optical
- fiber
- current sensor
- optical fiber
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
Abstract
The present invention provides fiber-current sensor light path system, belong to fiber optic communication field, including light source, optoisolator, optical filtering polariser, light circulator, light polarizer, optical fiber, optical fibre fusion splicer, 1/4 wavelength sheet, optical fiber sensing head, reflecting mirror, optical-electrical converter and analyser；Light source output terminal is connected with light polarizer through optoisolator；The outfan of light polarizer is connected with light polarizer through light circulator；Light polarizer is connected with optical fibre fusion splicer through optical fiber；Optical fibre fusion splicer connects through optical fiber and 1/4 wavelength sheet；1/4 wavelength sheet is connected with reflecting mirror through optical fiber sensing head；Light circulator is connected with optical-electrical converter with outfan；The outfan of optical-electrical converter is connected with the input of analyser.
Description
Technical field
The present invention relates to fiber optic communication field, specifically relate to fiber-current sensor light path system.
Background technology
Fibre optic current sensor, is to provide for power industry etc. and uses enterprise and the factory of high voltage and current, for holding
Reforwarding needs the demand of height reliability developed as equipment.Fibre optic current sensor is surveyed from early application analyzer
The amount line polarized light phase changing capacity to magnetic field；Afterwards propose use optical fiber as sensing current field assembly, but due to
The coefficient (Verdet constant) that optical fiber itself produces phase place change for magnetic field is the least, so directly measuring and not accurate enough, enters
And use instead interference formula phase changing capacity is changed into into light energy change, thus by observe light energy change calculate phase place
Change and size of current.Use interference mode that phase signal is converted to light energy change, and phase place change is also from actively demodulation
Transfer passive demodulation to, this is because actively modulation is easier to be affected, and have energy expenditure, reduce from active demodulation section
Divide the noise produced.In the fiber-optic current measuring system of existing technical device, there is certainty of measurement inaccurate etc..
Summary of the invention
What the present invention needed solution is the problem that existing fiber current sense light path system certainty of measurement is the highest, it is provided that optical fiber
Current sense light path system.
The present invention solves the problems referred to above by the following technical programs:
Fiber-current sensor light path system, including light source, optoisolator, optical filtering polariser, light circulator, light polarizer,
Optical fiber, optical fibre fusion splicer, 1/4 wavelength sheet, optical fiber sensing head, reflecting mirror, optical-electrical converter and analyser；
Light source output terminal is connected with light polarizer through optoisolator；The outfan of light polarizer is through light circulator and light polarization
Device connects；Light polarizer is connected with optical fibre fusion splicer through optical fiber；Optical fibre fusion splicer connects through optical fiber and 1/4 wavelength sheet；1/4 wavelength
Sheet is connected with reflecting mirror through optical fiber sensing head；Light circulator is connected with optical-electrical converter with outfan；The output of optical-electrical converter
End is connected with the input of analyser.
The present invention still further comprises power module, the outfan of power module and light source, optical fibre fusion splicer, optical fiber sensing
Head and analyser connect power supply.
In such scheme, preferably power module is DC-DC power module, mainly includes inverter, reducing transformer and steady
Volt circuit, the input of inverter electrically connects with city, and the outfan of inverter is connected with mu balanced circuit through reducing transformer.
In such scheme, preferably optical-electrical converter is photodiode, and optical signal is transferred to the signal of telecommunication.
In such scheme, preferably light source is laser instrument, the power light source that main output is stable, provides light for system
Source inputs.
In such scheme, preferably optoisolator is a permission light wave one direction transmission assembly, and its function is to avoid instead
The light wave penetrated returns to the resonant cavity of laser.
Advantages of the present invention with effect is:
1. the present invention is by Application of Virtual to optical-fiber-type current transformer, can be used for measuring bus electricity
Stream, display in real time is measured parameter and the waveform of signal, can be analyzed measurement data, store；
2. by the present invention in that to receive with analyser analysis and return the Wave data of coming, can be accurately according to Wave data
Analyze the size of current component；
3. further, the present invention has simple in construction, easy to assembly advantage, is user-friendly to.
Accompanying drawing explanation
Fig. 1 is present configuration block diagram.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Fiber-current sensor light path system, as it is shown in figure 1, include light source, optoisolator, optical filtering polariser, light circulator,
Light polarizer, optical fiber, optical fibre fusion splicer, 1/4 wavelength sheet, optical fiber sensing head, reflecting mirror, optical-electrical converter and analyser.
Light source output terminal is connected with light polarizer through optoisolator；The outfan of light polarizer is through light circulator and light polarization
Device connects；Light polarizer is connected with optical fibre fusion splicer through optical fiber；Optical fibre fusion splicer connects through optical fiber and 1/4 wavelength sheet；1/4 wavelength
Sheet is connected with reflecting mirror through optical fiber sensing head；Light circulator is connected with optical-electrical converter with outfan；The output of optical-electrical converter
End is connected with the input of analyser.
The present invention still further comprises power module, the outfan of power module and light source, optical fibre fusion splicer, optical fiber sensing
Head and analyser connect power supply.Power module is DC-DC power module, mainly includes inverter, reducing transformer and mu balanced circuit, inverse
The input becoming device electrically connects with city, and the outfan of inverter is connected with mu balanced circuit through reducing transformer.
Optical-electrical converter is photodiode, and optical signal is transferred to the signal of telecommunication, and the signal of telecommunication of conversion is passed to point further
Analyzer.Wave filter and amplifier wherein can be installed between optical-electrical converter and analyser, it is possible to achieve optical-electrical converter is turned
The signal of telecommunication changed first carries out Filtering Processing, is amplified the most again, such that it is able to improve precision further.
Light source is laser instrument, the power light source that main output is stable, provides light source input for system, as systematic survey
Light source source.
Work process of the present invention:
Fiber-current sensor light path is as it is shown in figure 1, include that light source, optoisolator, optical filtering polariser, light circulator, light are inclined
Shake device, optical fiber, optical fibre fusion splicer, 1/4 wavelength sheet, optical fiber sensing head, reflecting mirror, optical-electrical converter and analyser.Defeated at laser
Going out end, the most all can connect an optoisolator, optoisolator is only to allow light wave one direction transmission assembly, often uses at light source
Below, its function is the resonant cavity avoiding the light wave of reflection to return to laser, and affects the normal behaviour of laser, even burns laser.
The light of laser output, neither pure polarized light, is not non-polarized light, but has nubbin polarization state polarized light.Due to
Such polarized light polarization direction is not fixed, the linear polarization light energy the most directly produced by light polarizer as well as
By polarized light change with the angle of light polarizer.In order to avoid this light energy because of the angle of polarized light Yu light polarizer
Degree change produces the situation of optical power change, uses delustring polariser to eliminate the polarization state of laser in systems, thus produces
The light source of a raw no polarization state, all contains identical energy, produces at light polarizer after light path for all directions
Raw stable polarized light, so that the intensity noise of system response signal reduces.
Light circulator is to utilize faraday's principle so that the coupling that light will not be mutual on fiber path, has unidirectional biography
Defeated characteristic, and there is the function of isolator.The effect of the light polarizer in system is to produce linearly polarized photon, and produces
45 degree of angle light splitting, make twice light advance in X-direction with Y-direction, and X-direction and Y-direction in polarization-maintaining fiber
There is same light energy；And quarter wave plate is that linearly polarized photon is converted into left circularly polarized light and dextropolarization
Light.
Sensing to electric current is to sense head part at optical fiber, and the sensing head in this system is to be wound around with same distance by optical fiber
On electric current, this is desirable to every bit on optical fiber all has identical phase place to change to magnetic field, and the produced bending of every bit is damaged
Consume the most identical.Finally use faraday's reflecting mirror, light is reflected, faraday's reflecting mirror can by light rotated ninety degrees,
Hence for the light of walking on different paths, rotated ninety degrees and reach switching path, and reach to compensate temperature or vibration
The optical fibre refractivity caused slowly varying.
Light, through optoisolator, photodissociation polariser, light circulator, light polarizer, quarter wave plate, senses head, method
Draw after reflecting mirror reverses through fiber-current sensor head, quarter wave plate, light polarizer, complete a loop；
Local generation at light polarizer is interfered, photoelectric switching circuit, after interference light being changed into the signal of telecommunication, carrying out signal analysis.
Below preferred embodiment to the invention is illustrated, but the present invention is not limited to embodiment,
Those of ordinary skill in the art also can make on the premise of the invention spirit all equivalents modification or
Replacing, modification or the replacement of these equivalents are all contained in scope of the present application.
Claims (6)
1. fiber-current sensor light path system, it is characterised in that: include light source, optoisolator, optical filtering polariser, light circulator,
Light polarizer, optical fiber, optical fibre fusion splicer, 1/4 wavelength sheet, optical fiber sensing head, reflecting mirror, optical-electrical converter and analyser；
Light source output terminal is connected with light polarizer through optoisolator；The outfan of light polarizer is through light circulator with light polarizer even
Connect；Light polarizer is connected with optical fibre fusion splicer through optical fiber；Optical fibre fusion splicer connects through optical fiber and 1/4 wavelength sheet；1/4 wavelength sheet warp
Optical fiber sensing head is connected with reflecting mirror；Light circulator is connected with optical-electrical converter with outfan；The outfan of optical-electrical converter with
The input of analyser connects.
Fiber-current sensor light path system the most according to claim 1, it is characterised in that: also include power module, power supply
The outfan of module is connected power supply with light source, optical fibre fusion splicer, optical fiber sensing head and analyser.
Fiber-current sensor light path system the most according to claim 2, it is characterised in that: described power module is DC-DC
Power module, mainly includes inverter, reducing transformer and mu balanced circuit, and the input of inverter electrically connects with city, inverter defeated
Go out end to be connected with mu balanced circuit through reducing transformer.
Fiber-current sensor light path system the most according to claim 1, it is characterised in that: described optical-electrical converter is photoelectricity
Diode, transfers the signal of telecommunication to optical signal.
Fiber-current sensor light path system the most according to claim 1, it is characterised in that: described light source is laser instrument.
Fiber-current sensor light path system the most according to claim 1, it is characterised in that: described optoisolator is only to allow
Light wave one direction transmission assembly, its function is the resonant cavity avoiding the light wave of reflection to return to laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610472455.2A CN106199124A (en) | 2016-06-24 | 2016-06-24 | Fiber-current sensor light path system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610472455.2A CN106199124A (en) | 2016-06-24 | 2016-06-24 | Fiber-current sensor light path system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106199124A true CN106199124A (en) | 2016-12-07 |
Family
ID=57461718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610472455.2A Pending CN106199124A (en) | 2016-06-24 | 2016-06-24 | Fiber-current sensor light path system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106199124A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060892U (en) * | 1988-12-22 | 1990-08-22 | 清华大学 | Dynamic electricity sensor of closed loop detecting optical fibers of modulated light source |
| CN2093400U (en) * | 1991-05-07 | 1992-01-15 | 北方交通大学 | Optical fibre current sensor |
| EP0356670B1 (en) * | 1988-08-31 | 1993-10-06 | Asea Brown Boveri Ag | Fibre-optical current sensor |
| CN1183561A (en) * | 1996-11-21 | 1998-06-03 | 华中理工大学 | Integral compensation fibre-optic current sensor |
| CN1540355A (en) * | 2003-04-24 | 2004-10-27 | 伟 郭 | Reflection type 'Sage-qinke' interferometer type current transformer prepared from full optical fiber |
| CN102859383A (en) * | 2009-12-29 | 2013-01-02 | 普罗夫特克封闭股份管理公司 | Fiber optic current sensor |
-
2016
- 2016-06-24 CN CN201610472455.2A patent/CN106199124A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0356670B1 (en) * | 1988-08-31 | 1993-10-06 | Asea Brown Boveri Ag | Fibre-optical current sensor |
| CN2060892U (en) * | 1988-12-22 | 1990-08-22 | 清华大学 | Dynamic electricity sensor of closed loop detecting optical fibers of modulated light source |
| CN2093400U (en) * | 1991-05-07 | 1992-01-15 | 北方交通大学 | Optical fibre current sensor |
| CN1183561A (en) * | 1996-11-21 | 1998-06-03 | 华中理工大学 | Integral compensation fibre-optic current sensor |
| CN1540355A (en) * | 2003-04-24 | 2004-10-27 | 伟 郭 | Reflection type 'Sage-qinke' interferometer type current transformer prepared from full optical fiber |
| CN102859383A (en) * | 2009-12-29 | 2013-01-02 | 普罗夫特克封闭股份管理公司 | Fiber optic current sensor |
Non-Patent Citations (1)
| Title |
|---|
| 王克强，詹康生: "基于虚拟仪器的光纤电流感测系统", 《微计算机信息》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102928680B (en) | Electric field measurement system based on polarization compensation | |
| CN101968507B (en) | Optical fiber voltage sensor and adjustment method thereof | |
| CN101968508B (en) | All-fiber current sensor and polarization state control method thereof | |
| CN206496890U (en) | Polarization maintaining optical fibre time delay ring test system | |
| CN101915866A (en) | All-fiber current transformer and working method thereof | |
| CN103308783B (en) | Based on the optical crystal electric-field sensor of Distributed Feedback Laser | |
| CN106443551A (en) | Full-optical fiber current transformer monitoring system | |
| CN203324388U (en) | Optical crystal electric field sensor based on DFB laser | |
| CN103308082A (en) | Sensing structure of single ring embedded resonant cavity coupling M-Z interferometer | |
| CN106768867A (en) | LiNbO3Phase-modulator performance detecting system | |
| CN114577245B (en) | Optical fiber sensing system capable of simultaneously measuring current and vibration | |
| CN113945744B (en) | All-fiber direct current transformer temperature compensation system and method | |
| CN103869135A (en) | All-fiber current transformer with dual-protection function | |
| CN107179431A (en) | The optical fiber current sensing device and its method measured in real time based on birefringence | |
| CN106940395B (en) | Optical current transformer | |
| CN204008794U (en) | Interferential full optical-fiber voltage transformer (VT) between a kind of monolateral lobe | |
| CN201749141U (en) | Full fiber current transformer | |
| CN102830259A (en) | Full-optical-fiber current sensor | |
| CN204964600U (en) | Fiber current sensor optical structure | |
| CN204330856U (en) | The polarization error restraining device of the Y waveguide loop of optical fiber current mutual inductor | |
| CN206556842U (en) | LiNbO3 phase-modulator performance detecting systems | |
| CN203405499U (en) | A reflective all-fiber optical current transformer | |
| CN106199124A (en) | Fiber-current sensor light path system | |
| CN205786792U (en) | A kind of all-fiber current transformator based on optical fiber temperature sensor | |
| CN110207953B (en) | Optical fiber structure-based linearly polarized light laser extinction ratio testing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |