CN207301160U - Fbg Sensor For Measuring Magnetic Field with temperature compensation function - Google Patents
Fbg Sensor For Measuring Magnetic Field with temperature compensation function Download PDFInfo
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- CN207301160U CN207301160U CN201721461867.2U CN201721461867U CN207301160U CN 207301160 U CN207301160 U CN 207301160U CN 201721461867 U CN201721461867 U CN 201721461867U CN 207301160 U CN207301160 U CN 207301160U
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Abstract
The utility model provides a kind of Fbg Sensor For Measuring Magnetic Field with temperature compensation function, is related to fibre optic magnetic field field of sensing technologies, and in particular to a kind of Fbg Sensor For Measuring Magnetic Field with temperature compensation function.The utility model is that in order to solve in magnetic field sensing field, existing magnetic field sensing sensitivity is low, stability is poor, production cost is high, complicated and the problem of can not realize temperature-compensating.The utility model includes wideband light source, fiber coupler, magnetic field sensing head, spectrometer, No.1 single mode optical fiber, No. two single mode optical fibers, No. three single mode optical fibers.Wherein, magnetic field sensing head includes No.1 glass substrate, two flint glass F substrates, No.1 fiber grating, No. two fiber gratings, magnetostriction materials, No. four single mode optical fibers.The drift of No.1 fiber grating after being compensated by the measurement temperature spectrum under magnetic fields measures the intensity in magnetic field to be measured indirectly.
Description
Technical field
It the utility model is related to fibre optic magnetic field field of sensing technologies, and in particular to a kind of optical fiber with temperature compensation function
Grating magnetic field sensor.
Background technology
Power industry belongs to the basic activity of national development industry, there is very important ground in national economic development
Position.With industry, agricultural, traffic, the development of Defence business, power consumption is increasing, cause in electric system rated voltage and
Rated current grade improves year by year.In power industry, the measurement of electric current and voltage has very important effect, they are provided
Be used to measuring in electric system, control and relay protection etc. necessary to information.But with compound more and more of electricity consumption,
Detection to electric current proposes the requirement of higher, and traditional current sensor has not been well positioned to meet current industrial technology development
Needs, cause electric power system fault to occur again and again.
Novel optical current transformer can be good at making up the deficiency of conventional current mutual inductor, be traditional filling type electricity
The ideal substitute of induced field current mutual inductor, and optical current mutual inductor almost overcomes traditional electromagnetic type in theory
All shortcomings of current transformer, therefore widely studied, become a hot fields of following current measurement.
Fiber grating is that a kind of novel optical fiber developed rapidly in recent years has no chance device, has that cost is low, light-weight, body
Long-pending small, electromagnetism interference, be easily achieved the features such as distribution measuring and be widely used in communication and sensory field, especially exists
Electric current（Magnetic field）In sensory field, the fiber Bragg grating current of various structures（Magnetic field）Sensor continues to bring out out.Existing fiber
Grating magnetic field sensor majority can only realize the measurement of magnetic field list parameter, such sensor with temperature compensation function is rare
Report is essential according to the actual conditions of working sensor, temperature compensation function.Therefore, it is necessary to design sensitivity more
Fbg Sensor For Measuring Magnetic Field with temperature-compensating high, structure is simpler.
The content of the invention
The embodiment of the utility model provides the Fbg Sensor For Measuring Magnetic Field with temperature compensation function, be in order to
Solve that existing magnetic field sensor sensitivity is low, stability is poor, cost is excessive, complicated while can not achieve asking for temperature-compensating
Topic.
In order to achieve the above object, the utility model embodiment adopts the following technical scheme that：
A kind of Fbg Sensor For Measuring Magnetic Field with temperature compensation function is provided, which includes light source
（1）, fiber coupler（2）, magnetic field sensing head（3）, spectrometer（4）, No.1 single mode optical fiber（5）, No. two single mode optical fibers（6）, three
Number single mode optical fiber（7）；
Wherein, light source（1）With fiber coupler（2）Two-port netwerk side passes through No.1 single mode optical fiber（5）It is connected, magnetic field sensing
Head（3）With fiber coupler（2）Single port side passes through No. three single mode optical fibers（7）It is connected, spectrometer（4）With fiber coupler
（2）Two-port netwerk side passes through No. two single mode optical fibers（6）It is connected；
Magnetic field sensing head（3）, the magnetic field sensing head（3）Inside include No.1 glass substrate（3-1）, two flint glass F bases
Plate（3-2）, No.1 fiber grating（3-3）, No. two fiber gratings（3-4）, magnetostriction materials（3-5）, No. four single mode optical fibers（3-
6）, wherein, No.1 glass substrate（3-1）With two flint glass F substrates（3-2）Place side by side and the two edge be by glass cement adhesion,
No.1 glass substrate（3-1）On stick magnetostriction materials（3-5）, magnetostriction materials（3-5）On be stained with No.1 fiber grating
（3-3）, No. two fiber gratings（3-4）It is connected with No. four single mode optical fibers（3-6）One end be sticked to two flint glass F substrates（3-2）On, separately
One end can move freely, No.1 fiber grating（3-3）One end and No. two fiber gratings（3-4）One end pass through No. four single-mode optics
It is fine（3-6）It is connected, No.1 fiber grating（3-3）The other end passes through No. three single mode optical fibers（7）With fiber coupler（2）It is connected.
The light source（1）Output wavelength be 1550nm, the wideband light source of bandwidth 80nm.
The fiber coupler（2）Side carries two-port, and the coupling ratio of the two ports is 1:1, opposite side is
Single port, and insertion loss is 3dB.
The No.1 fiber grating（3-3）Length is 1.2cm, and centre wavelength is 1535.24nm, and bandwidth is
0.25nm, No. two fiber gratings（3-4）Length is 1.2cm, and centre wavelength is 1540.28nm, bandwidth 0.25nm.
The magnetostriction materials（3-5）For Terfenol-D.
The No.1 single mode optical fiber（5）, No. two single mode optical fibers（6）, No. three single mode optical fibers（7）With the connection of respective devices
Place is using the method for melting connection.
The utility model patent, which provides a kind of annular of magnetic gel filling micro-nano fiber sensing head and declines, swings magnetic field sensor,
The fibre optic magnetic field sensor improves that existing magnetic field sensor sensitivity is low, stability is poor, production cost is high, complicated and not
The problem of realizing temperature-compensating.
The beneficial effects of the utility model are：The utility model for current magnetic field transducer sensitivity is low, stability is poor,
Production cost is high, complicated and the shortcomings that can not achieve temperature-compensating, proposes improvement project.Two pieces of glass substrates are glued side by side
Close and form the base of magnetic field sensing head, uniform adhesion magnetostriction materials and by No.1 fiber grating on one of glass substrate
It is pasted onto on the magnetostriction materials, when along the fiber grating direction externally-applied magnetic field, is used up by magnetostriction materials
The pitch of fine grating changes.No. two fiber grating one end are sticked on the glass substrate of no magnetostriction materials, in temperature
During change, grating pitch can freely change.The centre wavelength of two fiber gratings is different.Pass through fiber coupler and No. two lists
The reflectance spectrum of two gratings is traveled to spectrometer by mode fiber, for spectrographic detection.Changed by No. two fiber gratings in temperature
When influence of the wave crest drift compensation temperature change to No.1 fiber grating magnetic-field measurement.Meanwhile the reflective fiber grating magnetic
Field sensor structure is relatively easy, of low cost.
Brief description of the drawings
Fig. 1 is the system structure of the Fbg Sensor For Measuring Magnetic Field with temperature compensation function；
Fig. 2 is the partial enlargement structure of magnetic field sensing head.
Embodiment
Specific embodiment of the present utility model is further illustrated with reference to Figure of description.
Such as Fig. 1, the Fbg Sensor For Measuring Magnetic Field with temperature compensation function described in present embodiment, it includes light source
（1）, fiber coupler（2）, magnetic field sensing head（3）, spectrometer（4）, No.1 single mode optical fiber（5）, No. two single mode optical fibers（6）, three
Number single mode optical fiber（7）；
Wherein, light source（1）With fiber coupler（2）Two-port netwerk side passes through No.1 single mode optical fiber（5）It is connected, magnetic field sensing
Head（3）With fiber coupler（2）Single port side passes through No. three single mode optical fibers（7）It is connected, spectrometer（4）With fiber coupler
（2）Two-port netwerk side passes through No. two single mode optical fibers（6）It is connected；
Such as Fig. 2, magnetic field sensing head（3）, the magnetic field sensing head（3）Inside include No.1 glass substrate（3-1）, No. two
Glass substrate（3-2）, No.1 fiber grating（3-3）, No. two fiber gratings（3-4）, magnetostriction materials（3-5）, No. four single modes
Optical fiber（3-6）, wherein, No.1 glass substrate（3-1）With two flint glass F substrates（3-2）Place side by side and the two edge passes through glass
Gluing company, No.1 glass substrate（3-1）On stick magnetostriction materials（3-5）, magnetostriction materials（3-5）On be stained with No.1 light
Fine grating（3-3）, No. two fiber gratings（3-4）It is connected with No. four single mode optical fibers（3-6）One end be sticked to two flint glass F substrates（3-2）
On, the other end can move freely, No.1 fiber grating（3-3）One end and No. two fiber gratings（3-4）One end pass through No. four
Single mode optical fiber（3-6）It is connected, No.1 fiber grating（3-3）The other end passes through No. three single mode optical fibers（7）With fiber coupler（2）Phase
Even.
The light source（1）Output wavelength be 1550nm, the wideband light source of bandwidth 80nm.
The fiber coupler（2）Side carries two-port, and the coupling ratio of the two ports is 1:1, opposite side is
Single port, and insertion loss is 3dB.
The No.1 fiber grating（3-3）Length is 1.2cm, and centre wavelength is 1535.24nm, and bandwidth is
0.25nm, No. two fiber gratings（3-4）Length is 1.2cm, and centre wavelength is 1540.28nm, bandwidth 0.25nm.
The magnetostriction materials（3-5）For Terfenol-D.
The No.1 single mode optical fiber（5）, No. two single mode optical fibers（6）, No. three single mode optical fibers（7）With the connection of respective devices
Place is using the method for melting connection.
When in use, light path is first built into completion according to brief description of the drawings, sensing head is placed parallel to magnetic direction.Treat light
It can be measured after the stable output signal of source.
Operation principle：
Fbg Sensor For Measuring Magnetic Field with temperature compensation function：
The course of work：First light path is connected by index path, opens light source, is placed in sensing head is parallel in magnetic field, treats light
Start to measure after the output light signal stabilization of source.The broadband optical signal of light source output is reached through No.1 single mode optical fiber and fiber coupler
Magnetic field sensing head, in magnetic field sensing head, light first pass through bottom carry magnetostriction materials No.1 fiber grating, and after through four
Number single mode optical fiber reaches No. two fiber gratings.Magnetostriction materials deform upon under the influence of a magnetic field, cause No.1 optical fiber light
Grid pitch changes.No. two fiber grating one end are pasted on the glass substrate, and the other end can move freely, from changes of magnetic field
Influence.The reflectance spectrum of two gratings is measured by spectrometer.By the reflectance spectrum of No. two fiber gratings in temperature change
When drift situation can make compensation to spectral drift of the No.1 fiber grating in magnetic fields.By to magnetic field intensity and benefit
The spectral drift fitting of rear No.1 fiber grating is repaid, it is found that the two has good linear relationship.Spectrum can thus be passed through
The measurement of drift indirectly measures magnetic field intensity.
Claims (6)
1. the Fbg Sensor For Measuring Magnetic Field with temperature compensation function, it is characterised in that：It includes light source（1）, fiber coupling
Device（2）, magnetic field sensing head（3）, spectrometer（4）, No.1 single mode optical fiber（5）, No. two single mode optical fibers（6）, No. three single mode optical fibers
（7）；
Wherein, light source（1）With fiber coupler（2）Two-port netwerk side passes through No.1 single mode optical fiber（5）It is connected, magnetic field sensing head
（3）With fiber coupler（2）Single port side passes through No. three single mode optical fibers（7）It is connected, spectrometer（4）With fiber coupler（2）
Two-port netwerk side passes through No. two single mode optical fibers（6）It is connected；
Magnetic field sensing head（3）, the magnetic field sensing head（3）Inside include No.1 glass substrate（3-1）, two flint glass F substrates
（3-2）, No.1 fiber grating（3-3）, No. two fiber gratings（3-4）, magnetostriction materials（3-5）, No. four single mode optical fibers（3-
6）, wherein, No.1 glass substrate（3-1）With two flint glass F substrates（3-2）Place side by side and the two edge be by glass cement adhesion,
No.1 glass substrate（3-1）On stick magnetostriction materials（3-5）, magnetostriction materials（3-5）On be stained with No.1 fiber grating
（3-3）, No. two fiber gratings（3-4）It is connected with No. four single mode optical fibers（3-6）One end be sticked to two flint glass F substrates（3-2）On, separately
One end can move freely, No.1 fiber grating（3-3）One end and No. two fiber gratings（3-4）One end pass through No. four single-mode optics
It is fine（3-6）It is connected, No.1 fiber grating（3-3）The other end passes through No. three single mode optical fibers（7）With fiber coupler（2）It is connected.
2. the Fbg Sensor For Measuring Magnetic Field according to claim 1 with temperature compensation function, it is characterised in that：It is described
Light source（1）Output wavelength be 1550nm, the wideband light source of bandwidth 80nm.
3. the Fbg Sensor For Measuring Magnetic Field according to claim 1 with temperature compensation function, it is characterised in that：It is described
Fiber coupler（2）Side carries two-port, and the coupling ratio of the two ports is 1:1, opposite side is Single port, and is inserted into
It is lost as 3dB.
4. the Fbg Sensor For Measuring Magnetic Field according to claim 1 with temperature compensation function, it is characterised in that：It is described
No.1 fiber grating（3-3）Length is 1.2cm, and centre wavelength is 1535.24nm, bandwidth 0.25nm, No. two optical fiber light
Grid（3-4）Length is 1.2cm, and centre wavelength is 1540.28nm, bandwidth 0.25nm.
5. the Fbg Sensor For Measuring Magnetic Field according to claim 1 with temperature compensation function, it is characterised in that：It is described
Magnetostriction materials（3-5）For Terfenol-D.
6. the Fbg Sensor For Measuring Magnetic Field according to claim 1 with temperature compensation function, it is characterised in that：It is described
No.1 single mode optical fiber（5）, No. two single mode optical fibers（6）, No. three single mode optical fibers（7）Junction with respective devices is using melting
The method of connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721461867.2U CN207301160U (en) | 2017-11-06 | 2017-11-06 | Fbg Sensor For Measuring Magnetic Field with temperature compensation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721461867.2U CN207301160U (en) | 2017-11-06 | 2017-11-06 | Fbg Sensor For Measuring Magnetic Field with temperature compensation function |
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| CN201721461867.2U Expired - Fee Related CN207301160U (en) | 2017-11-06 | 2017-11-06 | Fbg Sensor For Measuring Magnetic Field with temperature compensation function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801308A (en) * | 2018-08-29 | 2018-11-13 | 闫静 | A kind of fiber grating Multifunction Sensor |
| CN109633495A (en) * | 2018-12-26 | 2019-04-16 | 西安交通大学 | A kind of grating fibers magnetic field sensor with temperature-compensating and preparation method and the Distributed Measurement System based on it |
| CN112525259A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨理工大学 | Double-parameter optical fiber sensing device for monitoring current and temperature and implementation method |
| CN112525257A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨理工大学 | Double-parameter optical fiber sensing device for monitoring magnetic field and temperature and implementation method |
-
2017
- 2017-11-06 CN CN201721461867.2U patent/CN207301160U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801308A (en) * | 2018-08-29 | 2018-11-13 | 闫静 | A kind of fiber grating Multifunction Sensor |
| CN109633495A (en) * | 2018-12-26 | 2019-04-16 | 西安交通大学 | A kind of grating fibers magnetic field sensor with temperature-compensating and preparation method and the Distributed Measurement System based on it |
| CN112525259A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨理工大学 | Double-parameter optical fiber sensing device for monitoring current and temperature and implementation method |
| CN112525257A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨理工大学 | Double-parameter optical fiber sensing device for monitoring magnetic field and temperature and implementation method |
| CN112525259B (en) * | 2020-11-19 | 2021-09-07 | 哈尔滨理工大学 | Double-parameter optical fiber sensing device for monitoring current and temperature and implementation method |
| CN112525257B (en) * | 2020-11-19 | 2021-09-07 | 哈尔滨理工大学 | Double-parameter optical fiber sensing device for monitoring magnetic field and temperature and implementation method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20181106 |