CN104198789A - Optical fiber current transformer based on magnetostrictive effect - Google Patents
Optical fiber current transformer based on magnetostrictive effect Download PDFInfo
- Publication number
- CN104198789A CN104198789A CN201410461292.9A CN201410461292A CN104198789A CN 104198789 A CN104198789 A CN 104198789A CN 201410461292 A CN201410461292 A CN 201410461292A CN 104198789 A CN104198789 A CN 104198789A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- sensing probe
- magnetostrictive effect
- mutual inductor
- fiber grating
- 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
Landscapes
- Measuring Magnetic Variables (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses an optical fiber current transformer based on magnetostrictive effect. The optical fiber current transformer comprises a wideband light source, a coupler and an optical fiber grating sensing probe which are sequentially connected. An edge filter, a photoelectric probe, a demodulation circuit and a remote data processing terminal are sequentially connected to the coupler. The optical fiber grating sensing probe is an optical fiber magnetostrictive sensing probe. The optical fiber current transformer is resistant to electromagnetic interference, fast in response, wide in measuring band, good in insulation, small in size, convenient to mount and adaptive to the intelligent, digital and network requirements of current power systems.
Description
Technical field
The present invention relates to a kind of current transformer, specifically optical fiber current mutual inductor.
Background technology
For a long time, in Operation of Electric Systems, the current measurement task of high-voltage fence is all to be completed by traditional current transformer.But along with the development of China's intelligent grid, and the increase of society to electricity needs, electric system promotes power transmission efficiency by improving corresponding electric pressure.Meanwhile, traditional electromagnetic current transducer has exposed shortcomings: magnetic saturation, ferroresonance, hysteresis, measurement frequency band is narrow, dynamic range is little, poor insulativity etc., and this traditional current transformer has been difficult to meet the demand for development of electric system.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of optical fiber current mutual inductor based on magnetostrictive effect with the characteristic of anti-electromagnetic interference (EMI), fast response time, measurement bandwidth, good insulating.
For achieving the above object, technical scheme of the present invention is a kind of optical fiber current mutual inductor based on magnetostrictive effect, comprises the wideband light source SLED, coupling mechanism and the optical fiber grating sensing probe that are connected successively; On coupling mechanism, be connected with boundary filter, photodetector, demodulator circuit and Remote data processing terminal in turn; Described optical fiber grating sensing probe is optical fiber magnetostriction sensing probe;
The broadband light that described wideband light source sends, through coupling mechanism, be transferred to optical fiber magnetostriction sensing probe, under the action of alternating magnetic field producing at electric current, magnetostriction materials generation deformation, deformation effect makes its bragg wavelength be offset on fiber grating, the light being reflected back through fiber grating is transferred to boundary filter through fiber coupler again, then through photodetector, from photodetector electric signal out through separate being in harmonious proportion signal analysis, isolate dynamic, stationary singnal, can instead release two kinds of signals of temperature and electric current.
Light harvesting of the present invention source and filtering one, utilize the catoptrical centre wavelength of fiber grating to do edge filter at light source linearity range, realized the high speed demodulation of optic fiber grating wavelength, to measuring frequency band range, has certain expansion.
Described fiber-optic grating sensor probe has carried out separated layout with photoelectric switching circuit, makes electronic loop be arranged on the position away from electromagnetic interference (EMI), has eliminated the impact of electromagnetic interference (EMI) on electronic component.
Described coupling mechanism is 3dB fiber coupler.
The photoelectric switching circuit that described photodetector adopts avalanche photodide APD and operational amplifier to form.Utilize its avalanche multiplication effect light signal to be changed into the electric signal calling for subsequent demodulation circuit solution, greatly improved measuring accuracy.
Magnetostriction materials in described optical fiber grating sensing probe are trapezium structure.Through verification experimental verification trapezium structure, make Magnetostriction best, improved detection sensitivity.
In described optical fiber magnetostriction sensing probe, magnetostriction materials and fiber grating adopt the coupling scheme of surface adhesion.The deformation quantity that the suffered dependent variable of giant magnetostrictive material and fiber grating are occurred is consistent.
The method of described signal analysis is Hilbert-Huang transform, utilizes Hilbert-Huang transform to extract the transient parameter of short signal and sophisticated signal, automatically isolates dynamic, stationary singnal, i.e. two kinds of signals of temperature and electric current.At simplified apparatus, when reducing costs, improved accuracy of detection.
Described wideband light source carries light echo isolation.
Beneficial effect: the present invention has the characteristic of anti-electromagnetic interference (EMI), fast response time, measurement bandwidth, good insulating, and want little, the convenient installation of volume, can adapt to the demand of electric system now to intellectuality, digitizing, networking.
Accompanying drawing explanation
Fig. 1 is system connection diagram of the present invention;
Fig. 2 is edge filter schematic diagram.
Embodiment
As shown in Figure 1, a kind of optical fiber current mutual inductor based on magnetostrictive effect, comprises the wideband light source SLED, coupling mechanism and the optical fiber grating sensing probe that are connected successively; On coupling mechanism, be connected with boundary filter, photodetector, demodulator circuit and Remote data processing terminal in turn; Described optical fiber grating sensing probe is optical fiber magnetostriction sensing probe;
The broadband light that wideband light source sends, through coupling mechanism, be transferred to optical fiber magnetostriction sensing probe, under the action of alternating magnetic field producing at electric current, magnetostriction materials generation deformation, deformation effect makes its bragg wavelength be offset on fiber grating, the light being reflected back through fiber grating is transferred to boundary filter through fiber coupler again, then through photodetector, from photodetector electric signal out through separate being in harmonious proportion signal analysis, isolate dynamic, stationary singnal, can instead release two kinds of signals of temperature and electric current.
Fiber-optic grating sensor probe carries out separated layout with photoelectric switching circuit, and fiber-optic grating sensor connects by optical fiber and is arranged on high voltage bus, and corresponding electronic loop is arranged on the position away from electromagnetic interference (EMI).
Wherein coupling mechanism is 3dB fiber coupler, and wideband light source carries light echo isolation.
The photoelectric switching circuit that photodetector adopts avalanche photodide and operational amplifier to form, connects edge filtering circuit and demodulator circuit, utilizes its avalanche multiplication effect light signal to be changed into the electric signal calling for subsequent demodulation circuit solution.
Magnetostriction materials in optical fiber grating sensing probe are trapezium structure.
In optical fiber magnetostriction sensing probe, magnetostriction materials and fiber grating adopt the coupling scheme of surface adhesion.Be about to fiber grating and with epoxide-resin glue, stick on vertically the upper surface of giant magnetostrictive material, the epoxide-resin glue of evenly smearing can be good at the strain size of giant magnetostrictive material to pass to fiber grating, and the deformation quantity that the suffered dependent variable of giant magnetostrictive material and fiber grating are occurred is consistent.
When the effects of strain of magnetostriction materials and fiber grating, strain causes the drift of fiber bragg grating center wavelength, specifically, the light that light source sends is after fiber-optic grating sensor, the respective wavelength that meets resonance is reflected, as shown in Figure 2, the principle of utilizing input centre wavelength drift value and Output optical power variation to present linear relationship is carried out edge filter.
The method of signal analysis is Hilbert-Huang transform, utilizes Hilbert-Huang transform to extract the transient parameter of short signal and sophisticated signal, automatically isolates dynamic, stationary singnal, i.e. two kinds of signals of temperature and electric current.
Claims (7)
1. the optical fiber current mutual inductor based on magnetostrictive effect, is characterized in that: comprise the wideband light source, coupling mechanism and the optical fiber grating sensing probe that are connected successively; On coupling mechanism, be connected with boundary filter, photodetector, demodulator circuit and Remote data processing terminal in turn; Described optical fiber grating sensing probe is optical fiber magnetostriction sensing probe;
The broadband light that described wideband light source sends, through coupling mechanism, be transferred to optical fiber magnetostriction sensing probe, under the action of alternating magnetic field producing at electric current, magnetostriction materials generation deformation, deformation effect makes its bragg wavelength be offset on fiber grating, the light being reflected back through fiber grating is transferred to boundary filter through fiber coupler again, then through photodetector, from photodetector electric signal out through separate being in harmonious proportion signal analysis, isolate dynamic, stationary singnal, can instead release two kinds of signals of temperature and electric current.
2. a kind of optical fiber current mutual inductor based on magnetostrictive effect according to claim 1, is characterized in that: described coupling mechanism is 3dB fiber coupler.
3. a kind of optical fiber current mutual inductor based on magnetostrictive effect according to claim 1, is characterized in that: the photoelectric switching circuit that described photodetector adopts avalanche photodide and operational amplifier to form.
4. a kind of optical fiber current mutual inductor based on magnetostrictive effect according to claim 1, is characterized in that: the magnetostriction materials in described optical fiber grating sensing probe are trapezium structure.
5. according to a kind of optical fiber current mutual inductor based on magnetostrictive effect described in claim 1 or 4, it is characterized in that: in described optical fiber magnetostriction sensing probe, magnetostriction materials and fiber grating adopt the coupling scheme of surface adhesion.
6. a kind of optical fiber current mutual inductor based on magnetostrictive effect according to claim 1, it is characterized in that: the method for described signal analysis is Hilbert-Huang transform, utilize Hilbert-Huang transform to extract the transient parameter of short signal and sophisticated signal, automatically isolate dynamic, stationary singnal, i.e. two kinds of signals of temperature and electric current.
7. a kind of optical fiber current mutual inductor based on magnetostrictive effect according to claim 1, is characterized in that: described wideband light source carries light echo isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410461292.9A CN104198789B (en) | 2014-09-11 | 2014-09-11 | A kind of optical fiber current mutual inductor based on magnetostrictive effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410461292.9A CN104198789B (en) | 2014-09-11 | 2014-09-11 | A kind of optical fiber current mutual inductor based on magnetostrictive effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104198789A true CN104198789A (en) | 2014-12-10 |
| CN104198789B CN104198789B (en) | 2015-08-05 |
Family
ID=52084103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410461292.9A Active CN104198789B (en) | 2014-09-11 | 2014-09-11 | A kind of optical fiber current mutual inductor based on magnetostrictive effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104198789B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044628A (en) * | 2015-07-13 | 2015-11-11 | 电子科技大学 | Fiber F-P cavity magnetic sensor and magnetic localization logging device |
| CN105628065A (en) * | 2015-12-22 | 2016-06-01 | 南京工程学院 | Fiber grating signal demodulation device and demodulation method |
| CN107402320A (en) * | 2017-07-06 | 2017-11-28 | 华中科技大学 | A kind of reflection-type intensity modulated multi-core fiber current sensing system |
| CN109387760A (en) * | 2018-12-29 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of shelf depreciation quantitative detection system and method based on fiber grating |
| CN113671230A (en) * | 2021-09-10 | 2021-11-19 | 中国计量大学 | Electromagnetic conversion type optical fiber sensitization current sensing probe |
| CN113805078A (en) * | 2021-08-03 | 2021-12-17 | 西安理工大学 | Electric automobile retired power battery detection device based on FBG |
| CN115166331A (en) * | 2022-07-21 | 2022-10-11 | 哈尔滨理工大学 | Fiber current transformer based on fiber laser and GMM |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394488A (en) * | 1993-11-30 | 1995-02-28 | United Technologies Corporation | Optical fiber grating based sensor |
| CN1444026A (en) * | 2003-04-17 | 2003-09-24 | 中国计量学院 | Long-range 30 km distributed optical fibre Raman temperature sensor system |
| CN101672865A (en) * | 2009-08-20 | 2010-03-17 | 上海华魏光纤传感技术有限公司 | Novel optical fibre current sensor system |
| CN101710148A (en) * | 2009-12-09 | 2010-05-19 | 华南师范大学 | Current transformer and current detection system |
-
2014
- 2014-09-11 CN CN201410461292.9A patent/CN104198789B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394488A (en) * | 1993-11-30 | 1995-02-28 | United Technologies Corporation | Optical fiber grating based sensor |
| CN1444026A (en) * | 2003-04-17 | 2003-09-24 | 中国计量学院 | Long-range 30 km distributed optical fibre Raman temperature sensor system |
| CN101672865A (en) * | 2009-08-20 | 2010-03-17 | 上海华魏光纤传感技术有限公司 | Novel optical fibre current sensor system |
| CN101710148A (en) * | 2009-12-09 | 2010-05-19 | 华南师范大学 | Current transformer and current detection system |
Non-Patent Citations (2)
| Title |
|---|
| 温济霞等: "Bragg光纤光栅电流传感器的设计与研究", 《伺服控制》 * |
| 胡勇勤: "基于边缘滤波器的光纤光栅解调技术的研究", 《武汉理工大学硕士学位论文》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044628A (en) * | 2015-07-13 | 2015-11-11 | 电子科技大学 | Fiber F-P cavity magnetic sensor and magnetic localization logging device |
| CN105628065A (en) * | 2015-12-22 | 2016-06-01 | 南京工程学院 | Fiber grating signal demodulation device and demodulation method |
| CN107402320A (en) * | 2017-07-06 | 2017-11-28 | 华中科技大学 | A kind of reflection-type intensity modulated multi-core fiber current sensing system |
| CN109387760A (en) * | 2018-12-29 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of shelf depreciation quantitative detection system and method based on fiber grating |
| CN113805078A (en) * | 2021-08-03 | 2021-12-17 | 西安理工大学 | Electric automobile retired power battery detection device based on FBG |
| CN113671230A (en) * | 2021-09-10 | 2021-11-19 | 中国计量大学 | Electromagnetic conversion type optical fiber sensitization current sensing probe |
| CN115166331A (en) * | 2022-07-21 | 2022-10-11 | 哈尔滨理工大学 | Fiber current transformer based on fiber laser and GMM |
| CN115166331B (en) * | 2022-07-21 | 2023-08-11 | 哈尔滨理工大学 | Fiber current transformer based on fiber laser and GMM |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104198789B (en) | 2015-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104198789B (en) | A kind of optical fiber current mutual inductor based on magnetostrictive effect | |
| CN108088655B (en) | Based on double sideband modulation and the optical device measurement method of frequency displacement, device | |
| CN102445581B (en) | Capacitive voltage-division type self-calibration optical voltage transducer | |
| CN103399191B (en) | FBG-GMM electric current sensing method based on sideband demodulation | |
| CN102590739B (en) | On-line detecting device for switch-on and switch-off period of power switch cabinet circuit breaker | |
| CN101666689B (en) | Wavelength optimization-type high-performance distributed optical fiber sensing system and sensing method | |
| CN101750573A (en) | Portable cable local discharge detection device | |
| CN101696896B (en) | Photoelectric device of distributed optical fiber temperature sensing system | |
| CN102175923A (en) | Transmission line dynamic loss measurement system and method | |
| CN202563065U (en) | Opening and closing period on-line detection device for electric power switch cabinet breaker | |
| CN101672865A (en) | Novel optical fibre current sensor system | |
| CN106772133A (en) | A kind of space magnetic field sensor based on micro-nano fiber and preparation method thereof | |
| CN104280841A (en) | Electric field sensitive element of full-fiber structure and electric field sensing device | |
| CN204188690U (en) | A kind of optical fiber current mutual inductor based on magnetostrictive effect | |
| CN207300268U (en) | Fiber Bragg Grating FBG demodulating equipment | |
| CN205038331U (en) | Based on GMM -FBG power current mutual inductance and amplitude frequency characteristic test combination unit | |
| CN204241671U (en) | Broadband transient transcendence measurement mechanism | |
| CN201903351U (en) | Demodulation device for dynamic change of fiber bragg grating | |
| CN104280900A (en) | Electric field sensing element with all-fiber structure and electric field sensing device | |
| CN104034936A (en) | Device for measuring lightning current parameter by using optical fiber | |
| CN204206117U (en) | A kind of amplifier of creatures' physical electric signals circuit of fast detector | |
| CN102969718A (en) | Current sampling method for active power filter | |
| CN110488065A (en) | A kind of high-voltage signal acquisition system based on optical fiber transmission | |
| CN109633235A (en) | A kind of optical fiber current mutual inductor of multi-parameter sensing | |
| CN202939207U (en) | Micro electro mechanical system current sensing device based on optical readout |
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 |