CN205861750U - Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid - Google Patents
Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid Download PDFInfo
- Publication number
- CN205861750U CN205861750U CN201620608722.XU CN201620608722U CN205861750U CN 205861750 U CN205861750 U CN 205861750U CN 201620608722 U CN201620608722 U CN 201620608722U CN 205861750 U CN205861750 U CN 205861750U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- conductive loop
- sensing head
- cover
- current sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
This utility model provides a kind of based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid.Current sensor includes magnetic conductive loop, radome, sensing head, fiber coupler, spectrogrph and wide spectrum light source；Magnetic conductive loop is rectangular-shaped loops, and it has slit, and the magnetic conductor of slit both sides is respectively wrapped up by a rectangle magnetic shielding cover；Magnetic-assemblying area that sensing head is placed in slit or cover magnetic region, sensing head radial parallel in the top plan of two tapers；The wide spectrum optical that wide spectrum light source sends enters sensing head through fiber coupler, and the optical signal reflected through sensing head enters spectrogrph by fiber coupler.Above-mentioned technology of the present utility model is avoided that birefringence problem based on sensor assembly and method for measuring strokes of lightning and problem based on giant magnetostrictive material current sensor hysteresis curve, forms territory, magnetic-assemblying area by the magnetic field that tested wire can be made to produce with the biconial magnetic conductive loop of radome and cover magnetic area in magnetic circuit slit.
Description
Technical field
This utility model relates to current sensing techniques, particularly relate to a kind of based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and
The current sensor of magnetic fluid.
Background technology
Fibre optic current sensor is a kind of intelligent grid detection equipment, and it has, and security performance is good, electromagnetism interference, non-connect
Touch measure, can on-the-spot real-time telemetry and the plurality of advantages such as range of dynamic measurement is wide.In current measurement and analysis field, optical fiber electricity
Flow sensor attracts numerous scholars to study, and will be used widely at electric power detection industry.
Different according to realization means, current fibre optic current sensor is broadly divided into two classes: (1) is based on Faraday effect
Fibre optic current sensor.This sensor has the advantages such as good insulating, measurement scope be big, but it is inclined to there is optical fiber V erdet constant
The problem that low and fiber birefringence is difficult to overcome.(2) fibre optic current sensor based on giant magnetostrictive material (GMM).This type of
Sensor is difficult to overcome the intrinsic magnetic hysteresis of GMM material non-linear, and sensing head is difficult to miniaturization.
Magnetic fluid is to answer Development of Modern Science and a kind of superparamagnetic characteristic liquid functional material of producing, almost solids-free magnetic
The hysteresis that property material is had, its refractive index the most linearly changes with externally-applied magnetic field, and is prone to and optical fiber
Combine.Being currently, there are the current sensing techniques combined by magnetic fluid with optical fiber, this technology can make up imitates based on faraday
A kind of electricity based on magnetic fluid should be disclosed with the shortcoming of current sensor based on GMM material, such as CN 201510423585.2
Flow sensor, but, should the current measurement sensitivity of current sensor based on magnetic fluid the highest, and sensitivity and range
Modification scope limited.
Summary of the invention
Given below about brief overview of the present utility model, in order to provide about some side of the present utility model
The basic comprehension in face.Should be appreciated that this general introduction is not to summarize about exhaustive of the present utility model.It is not intended to really
Fixed key of the present utility model or pith, be not intended limitation scope of the present utility model.Its purpose is only with letter
The form changed provides some concept, in this, as the preamble in greater detail discussed after a while.
In consideration of it, this utility model provides a kind of based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the electric current of magnetic fluid
Sensor, the problem the highest at least to solve the current measurement sensitivity of existing current sensor based on magnetic fluid.
According to an aspect of the present utility model, it is provided that one is based on poly-magnetic and covers the difunctional magnetic conductive loop of magnetic and magnetic current
Based on poly-magnetic and the current sensor covering the difunctional magnetic conductive loop of magnetic and magnetic fluid, the current sensor of body, should include that magnetic conduction returned
Road, radome, sensing head, fiber coupler, spectrogrph and wide spectrum light source；Wherein, magnetic conductive loop is rectangular-shaped loops, and magnetic conduction returns
Having slit on one limit on road, the magnetic conductor of slit both sides is respectively wrapped up by a rectangle magnetic shielding cover, and the leading of slit both sides
Magnet is two relative tapers, and the top of two tapers is circle；It is narrow that sensing head is placed between the top of two tapers
Slit areas between seam region or radome and taper, and sensing head is radial parallel in the top plan of two tapers；Wide
The wide spectrum optical that spectrum light source sends enters sensing head after fiber coupler, and the optical signal reflected through sensing head is coupled by optical fiber
Device enters spectrogrph.
Further, sensing head includes single-mode fiber part, hollow-core fiber part and panda optic fibre part；Wherein, single
One end phase welding of one end of mode fiber part and hollow-core fiber part, the other end of hollow-core fiber part and panda optic fibre part
Phase welding, hollow-core fiber partial interior is optical fiber microcavity；A hole is had, as panda optic fibre on the side of panda optic fibre part
The side opening of part, side opening is only connected with one of two pores of panda optic fibre part；In the exposed end face of panda optic fibre part
The pore being connected with side opening be closed；It is filled with magnetic fluid in optical fiber microcavity.
Further, a length of 50 μm-200 μm of hollow-core fiber part, hollow-core fiber part internal diameter is 60 μm-100 μ
M, the external diameter of hollow-core fiber segment outer radius, the external diameter of panda optic fibre part and single-mode fiber part is 125 μm, panda optic fibre
In the covering of part, two hole diameters are 10 μm-30 μm, and two pore center distance are 25 μm-60 μm, panda optic fibre part
A length of 10mm-20mm, the fusion point 2mm-5mm of side opening distance panda optic fibre part and hollow-core fiber part.
Further, the length of two tapers is 30mm, and top is diameter circle between 3mm-5mm, two
Distance between the top of taper is between 1mm-3mm.
Further, the thickness of two rectangle magnetic shielding covers is 2mm, and two rectangle magnetic shielding cover length are 35mm,
Two rectangle magnetic shielding cover internal diameter sizes are 30mm*30mm, and the distance between two rectangle magnetic shielding covers is 2mm-5mm.
Further, the spectral region of wide spectrum light source is 1300nm-1600nm.
Further, the sectional dimension of magnetic conductive loop is 30mm*30mm.
Of the present utility model based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, can not only
Avoid birefringence problem based on sensor assembly and method for measuring strokes of lightning, can solve the problem that simultaneously and pass based on giant magnetostrictive material electric current
The problem of sensor hysteresis curve..Additionally, make the magnetic field in magnetic circuit slit be divided into poly-magnetic by radome and biconial magnetic conductive loop
District and cover magnetic region, is placed in sensing head territory, magnetic-assemblying area and can realize high sensitivity, small-range current measurement, be placed in by sensing head and cover magnetic
Region can realize muting sensitivity, wide range current measurement, thus significantly increases the sensitivity of this current sensor and range
Modification scope.
By below in conjunction with the accompanying drawing detailed description to most preferred embodiment of the present utility model, of the present utility model these with
And other advantages will be apparent from.
Accompanying drawing explanation
This utility model can be by with reference to being better understood, wherein below in association with the description given by accompanying drawing
Employ same or analogous reference in all of the figs to represent same or like parts.Described accompanying drawing together with under
The detailed description in face comprises in this manual and is formed the part of this specification together, and is used for illustrating further
Bright preferred embodiment of the present utility model and explanation principle and advantage of the present utility model.In the accompanying drawings:
Fig. 1 be illustrate of the present utility model based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid
The structural representation of an example；
Fig. 2 is the schematic diagram of a kind of possible structure illustrating the sensing head shown in Fig. 1；
Fig. 3 is magnetic conductive loop, radome and tapered zone Distribution of Magnetic Field schematic diagram.
It will be appreciated by those skilled in the art that the element in accompanying drawing be only used to simple and clear for the sake of and illustrate,
And be not necessarily drawn to scale.Such as, in accompanying drawing, the size of some element may be exaggerated relative to other elements, with
Just the understanding to this utility model embodiment it is favorably improved.
Detailed description of the invention
Hereinafter in connection with accompanying drawing, one exemplary embodiment of the present utility model is described.Rise for clarity and conciseness
See, the most do not describe all features of actual embodiment.It should be understood, however, that developing any this reality
Must make during embodiment much specific to the decision of embodiment, in order to realize the objectives of developer, example
As, meet those restrictive conditions relevant to system and business, and these restrictive conditions may along with embodiment not
Change together.Additionally, it also should be appreciated that, although development is likely to be extremely complex and time-consuming, but to having benefited from
For those skilled in the art of present disclosure, this development is only routine task.
Here, also need to explanation a bit, in order to avoid having obscured this utility model because of unnecessary details, attached
Figure illustrate only and according to the closely-related apparatus structure of scheme of the present utility model and/or process step, and eliminate
Other details little with this utility model relation.
Embodiment of the present utility model provides a kind of based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the electricity of magnetic fluid
Flow sensor, should include magnetic conductive loop, sensing based on poly-magnetic and the current sensor covering the difunctional magnetic conductive loop of magnetic and magnetic fluid
Head, fiber coupler, spectrogrph and wide spectrum light source；Wherein, magnetic conductive loop is rectangular-shaped loops, and a limit of magnetic conductive loop is opened
Having slit, the magnetic conductor of slit both sides is respectively wrapped up by a rectangle magnetic shielding cover, and the magnetic conductor of slit both sides be two relatively
Taper, the top of these two tapers is circle；Sensing head is placed in the slit areas between the top of two tapers or shielding
Cover the slit areas between taper, and sensing head is radial parallel in the top plan of two tapers；Wide spectrum light source sends
Wide spectrum optical enters sensing head after fiber coupler, and the optical signal reflected through sensing head enters spectrum by fiber coupler
Instrument.
Describe of the present utility model based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the electricity of magnetic fluid below in conjunction with Fig. 1
One example of flow sensor.As it is shown in figure 1, it is of the present utility model based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and magnetic fluid
Current sensor 100 include magnetic conductive loop 1-1, sensing head 1-2, fiber coupler 1-3, spectrogrph 1-4, wide spectrum light source 1-5
And radome 1-6.
Magnetic conductive loop 1-1 is rectangular-shaped loops, as it is shown in figure 1, have slit, slit on a limit of magnetic conductive loop 1-1
The magnetic conductor of both sides is respectively wrapped up by a rectangle magnetic shielding cover 1-6, and the magnetic conductor of these slit both sides is two relative tapers,
The top of these two tapers is circle.The thickness of two radome 1-6 is such as 2mm, and length is such as 35mm, internal diameter
Size is such as 30mm*30mm, and the distance between two radomes is such as between 2mm-5mm.The length example of two tapers
As being 30mm, the top of two tapers is such as diameter circle between 3mm-5mm, between the top of two tapers
Distance such as between 1mm-3mm.The square sectional of the cross section of magnetic conductive loop 1-1 for example, 30mm*30mm.
Sensing head 1-2 is placed in the slit areas between the top of two above taper or with between upper conical and radome
Slit areas, and sensing head 1-2's is radial parallel in the top plan of two above taper.
Wide spectrum light source 1-5 connects fiber coupler 1-3, fiber coupler 1-3 by optical fiber and connects sensing head by optical fiber
1-2, and spectrogrph 1-4 connects fiber coupler 1-3 also by optical fiber.So, the wide spectrum optical that wide spectrum light source 1-5 sends is through light
Entering sensing head 1-2 after fine bonder 1-3, the optical signal reflected through sensing head 1-2 enters spectrogrph by fiber coupler 1-3
1-4.Wherein, the spectral region of wide spectrum light source 1-5 for example, 1300nm-1600nm.
Compared to the current sensor in CN 201510423585.2, of the present utility model based on magnetic conductive loop and magnetic current
The current sensor of body can pass through taper magnetic conductive loop, and the magnetic field making tested wire produce converges on sensing head, therefore
Electric current at sensing head can be greatly improved to the transformation efficiency in magnetic field and current measurement sensitivity.And CN
Current sensor in 201510423585.2 does not also take into account tested wire and produces the problem of magnetic field output at sensing head, real
On border, the efficiency in the magnetic field that wire produces at sensing head is the lowest, and limited adjustment range.Cause the electric current of this current sensor
Measure sensitivity the highest, and the modification scope of sensitivity and range is limited.
According to a kind of implementation, as in figure 2 it is shown, sensing head 1-2 can include single-mode fiber part 2-1, hollow-core fiber
Part 2-2 and panda optic fibre part 2-3.Wherein, one end of single-mode fiber part 2-1 and one end of hollow-core fiber part 2-2
Phase welding, one end phase welding of the other end of hollow-core fiber part 2-2 and panda optic fibre part 2-3, hollow-core fiber part 2-2
Inside is optical fiber microcavity.A hole is had, as side opening (its of panda optic fibre part 2-3 on the side of panda optic fibre part 2-3
Middle side opening is not shown in FIG. 2), this side opening is only connected with one of two pores of panda optic fibre part 2-3.Panda optic fibre portion
The pore quilt being connected with side opening on the exposed ends of point 2-3 (i.e. its not with that end of hollow-core fiber part 2-2 welding) end face
Close (such as by resin glue, this pore being blocked).It is filled with magnetic fluid in optical fiber microcavity, and magnetic fluid is full of whole light
Fine microcavity.
Optical fiber microcavity volume is the least, effectively can be combined with magnetic conduction magnetic circuit, and the magnetic-assemblying area being placed on slit can carry significantly
The measurement sensitivity of high electric current, it is achieved high sensitivity, small-range current measurement；It is placed on and covers magnetic region and can reduce the measurement of electric current
Sensitivity, it is achieved muting sensitivity, wide range current measurement.Therefore, the sensitivity of this current sensor and the modification scope of range
The biggest.
Unlike the prior art, prior art generally will be pasted with GMM and the magnetic of fiber grating to implementation above mode
Road combines, and utilizes the Magnetostrictive Properties of GMM to realize current measurement by the spectrum change of detection fiber grating, although the method
Also the magnetic field that current in wire produces can be gathered on sensing head, but GMM exists intrinsic hysteresis loop characteristic, limits this kind
The raising measuring sensitivity of method；And the magnetic fluid that this utility model is utilized is a kind of superparamagnetic characteristic liquid, do not exist
Hysteresis curve characteristic, therefore, can be greatly improved sensitivity by the way of the poly-magnetic of magnetic circuit.
The diameter dimension of the side opening in panda optic fibre part 2-3 for example, 3 μm-20 μm, it can use femtosecond laser to beat
Hole mode realizes.
Wherein, the length of hollow-core fiber part 2-2 for example, 50 μm-200 μm, internal diameter for example, 60 μm-100 μm.Empty
The external diameter of core fibre part 2-2 is identical with the external diameter of the external diameter of panda optic fibre part 2-3 and single-mode fiber part 2-1, such as
It is 125 μm.Two hole diameter for example, 10 μm-30 μm, two pore center distance in the covering of panda optic fibre part 2-3
For example, 25 μm-60 μm, the length of panda optic fibre part 2-3 for example, 10mm-20mm.Side opening such as distance panda optic fibre portion
Divide the fusion point 2mm-5mm of 2-3 and hollow-core fiber part 2-2.Experimental data shows, the sensing head using above parameter can
Improve the measurement sensitivity of electric current further.
Application example 1
Describe of the present utility model based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid below
One application example of 100.
As it is shown in figure 1, current sensor 100 is when measuring electric current, magnetic conductive loop 1-1 is enclosed within tested wire so that
Tested wire is passed through by the cavity center of magnetic conductive loop 1-1, and magnetic conductive loop 1-1 senses tested electric current, and will produce in magnetic circuit
Introduction by magnetic field on the sensing head 1-2 in magnetic circuit slit.Under the influence of a magnetic field, magnetic fluid can produce mangneto and sell off effect,
Its refractive index changes with the change in magnetic field, and then causes the change of optical fiber microcavity light path, so that the interference of optical fiber microcavity
Spectrum translation, can obtain the size of tested electric current by the size of detection interference spectrum translation.
Wide spectrum light source 1-5 uses ASE light source, and its spectral region is 1300nm-1600nm, and the wide spectrum optical sent is through 1 × 2 light
After fine bonder (as the example of fiber coupler 1-3), enter sensing head 1-2(magnetic fluid optical fiber microcavity), through sensing head 1-2
The optical signal of reflection enters spectrogrph 1-4 by above-mentioned 1 × 2 fiber coupler, is realized signal by computer the most again
Process.
Magnetic fluid has mangneto and sells off characteristic, and current sensor 100 utilizes this characteristic of magnetic fluid to realize magnetic field exactly
Sensing.The magnetic field that current in wire is produced by magnetic conductive loop 1-1 is loaded on sensing head by magnetic circuit, under the influence of a magnetic field,
The variations in refractive index of magnetic fluid, causes the optical path difference of optical fiber microcavity to change, and then causes the spectrum translation of magnetic fluid optical fiber microcavity interference.
The size of interference spectrum translational movement and tested electric current the most linearly, utilizes this relation by measuring optical fiber microcavity interference
The size of spectrum translational movement, can obtain the size in tested magnetic field.
Fig. 3 is magnetic conductive loop and slit internal magnetic field distribution schematic diagram thereof.As it is shown on figure 3, magnetic conductive loop 1-1 is shaped as rectangle
Loop, sectional dimension is 30mm*30mm(square sectional), wherein have a slit, and the magnetic conductor of slit both sides on an arm
Being two relative tapers, the top of two tapers is diameter circle between 30mm-50mm, the top of two tapers it
Between distance between 1mm-3mm, sensing head be placed in the slit areas between the top of two tapers or radome and taper it
Between slit areas, and sensing head is radial parallel in the top plan of two tapers.Simulation result as shown in Figure 3 shows, quilt
The magnetic field surveying electric current generation is concentrated mainly on tapered tip, and next concentrates in radome, and magnetic between radome and bullet
Field is the most weak, then occurs in that two distinct regions in magnetic circuit slit, and one is gathering between the top of two tapers
Magnetic region, another is to cover magnetic region between radome and bullet.Sensing head 1-2 is placed in territory, magnetic-assemblying area and can realize highly sensitive
Degree, small-range current measurement；Sensing head 1-2 is placed in and covers magnetic area and can realize muting sensitivity, wide range current measurement.
Although the embodiment according to limited quantity describes this utility model, but benefits from above description, this technology
Skilled person understands, in the range of this utility model thus described, it can be envisaged that other embodiments.Additionally,
It should be noted that, the language used in this specification primarily to the readable and purpose of teaching and select rather than in order to
Explain or limit theme of the present utility model and select.Therefore, without departing from the scope of the appended claims and spirit
In the case of, many modifications and changes will be apparent from for those skilled in the art.For this
The scope of utility model, the disclosure being done this utility model is illustrative and not restrictive, scope of the present utility model
It is defined by the appended claims.
Claims (6)
1. based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, it is characterised in that described based on poly-
Magnetic and the current sensor covering the difunctional magnetic conductive loop of magnetic and magnetic fluid include that magnetic conductive loop, radome, sensing head, optical fiber couple
Device, spectrogrph and wide spectrum light source；
Wherein, described magnetic conductive loop is rectangular-shaped loops, and a limit of described magnetic conductive loop has slit, described slit both sides
Magnetic conductor is respectively wrapped up by a rectangle magnetic shielding cover, and the magnetic conductor of described slit both sides is two relative tapers, two cones
The top of shape is circle, and the slit areas between the top of two tapers is magnetic-assemblying area, described taper and described radome it
Between slit areas for covering magnetic region；
Described sensing head is placed in the magnetic-assemblying area of described slit or covers magnetic region, and the radial parallel of described sensing head is bored in said two
The top plan of shape；
The wide spectrum optical that described wide spectrum light source sends enters described sensing head after described fiber coupler, anti-through described sensing head
The optical signal penetrated enters described spectrogrph by described fiber coupler.
The most according to claim 1 based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, its
Being characterised by, described sensing head includes single-mode fiber part, hollow-core fiber part and panda optic fibre part；
Wherein, one end phase welding of one end of described single-mode fiber part and described hollow-core fiber part, described hollow-core fiber portion
The other end divided and described panda optic fibre part phase welding, described hollow-core fiber partial interior is optical fiber microcavity；Described panda light
Have a hole on the side of fine part, as the side opening of described panda optic fibre part, described side opening only with described panda optic fibre
One of two pores of part are connected；The gas being connected with described side opening in the exposed end face of described panda optic fibre part
Hole is closed；It is filled with magnetic fluid in described optical fiber microcavity.
The most according to claim 2 based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, its
Being characterised by, a length of 50 μm-200 μm of described hollow-core fiber part, the internal diameter of described hollow-core fiber part is 60 μm-100 μ
M, the external diameter of the external diameter of described hollow-core fiber part, the external diameter of described panda optic fibre part and described single-mode fiber part is
125 μm, in the covering of described panda optic fibre part, two hole diameters are 10 μm-30 μm, and said two pore center distance is
25 μm-60 μm, a length of 10mm-20mm of described panda optic fibre part, described side opening is apart from described panda optic fibre part and institute
State the fusion point 2mm-5mm of hollow-core fiber part.
The most according to claim 1 based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, its
Being characterised by, the length of said two taper is 30mm, and the top of said two taper is diameter between 3mm-5mm
Circle, the distance between the top of said two taper is between 1mm-3mm, and the thickness of described rectangle magnetic shielding cover is 2mm, institute
Stating a length of 35mm of rectangle magnetic shielding cover, the internal diameter size of described rectangle magnetic shielding cover is 30mm*30mm, described rectangle magnetic
Distance between radome is 2mm-5mm.
The most according to claim 1 based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, its
Being characterised by, the spectral region of described wide spectrum light source is 1300nm-1600nm.
The most according to claim 1 based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid, its
Being characterised by, the sectional dimension of described magnetic conductive loop is 30mm*30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620608722.XU CN205861750U (en) | 2016-06-21 | 2016-06-21 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620608722.XU CN205861750U (en) | 2016-06-21 | 2016-06-21 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205861750U true CN205861750U (en) | 2017-01-04 |
Family
ID=57636754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620608722.XU Expired - Fee Related CN205861750U (en) | 2016-06-21 | 2016-06-21 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205861750U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093512A (en) * | 2016-06-21 | 2016-11-09 | 哈尔滨理工大学 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
| CN109254252A (en) * | 2017-07-12 | 2019-01-22 | 恩智浦有限公司 | The system of magnetic field sensor and combined magnetic field sensor with magnetic field shielding structure |
| CN109725187A (en) * | 2018-12-29 | 2019-05-07 | 杭州电子科技大学 | A kind of magnetic screen open-loop current sensor |
-
2016
- 2016-06-21 CN CN201620608722.XU patent/CN205861750U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093512A (en) * | 2016-06-21 | 2016-11-09 | 哈尔滨理工大学 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
| CN109254252A (en) * | 2017-07-12 | 2019-01-22 | 恩智浦有限公司 | The system of magnetic field sensor and combined magnetic field sensor with magnetic field shielding structure |
| CN109725187A (en) * | 2018-12-29 | 2019-05-07 | 杭州电子科技大学 | A kind of magnetic screen open-loop current sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205861750U (en) | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid | |
| CN106338702A (en) | Temperature-insensitive magnetic field sensor based on magnetic fluid filling optical fiber microcavity | |
| CN206488795U (en) | A kind of all -fiber magnetic field sensor coated based on magnetic fluid | |
| CN104950133B (en) | Microfluid flow velocity sensing chip, detecting system and detection method | |
| CN103630853A (en) | Inductive magnetic field sensor | |
| CN107843758A (en) | A kind of two die drawings cone fibre optic current sensor and preparation method | |
| CN106772133A (en) | A kind of space magnetic field sensor based on micro-nano fiber and preparation method thereof | |
| CN101308197B (en) | Magnetic flux door sensor probe | |
| CN100588914C (en) | Photon crystal optical fiber sensing device based on cladding leaded light | |
| CN106226271A (en) | A kind of SPR PCF sensor based on helix core | |
| CN109709499B (en) | Probe type vector magnetic field sensor based on fiber bragg grating and manufacturing method thereof | |
| CN105911328A (en) | Current sensor based on magnetism-guided loop and magnetic fluid | |
| CN106093512A (en) | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid | |
| CN106679557A (en) | Device and measuring method for measuring micrometric displacement of magnetic levitation ball | |
| CN204359817U (en) | Based on two optical fiber Bragg raster high frequency acceleration transducer | |
| CN205670167U (en) | Based on magnetic conductive loop and the current sensor of magnetic fluid | |
| Shentu et al. | Research on an electromagnetic induction-based deep displacement sensor | |
| CN109375124A (en) | A kind of magnetic field vector sensor based on wide-angle tilt fiber grating | |
| CN106813693B (en) | A kind of ultrasound three-component probe, the three-component method and apparatus of detection ultrasound | |
| CN206096413U (en) | Insensitive magnetic field sensor of temperature based on optic fibre microcavity is filled to magnetic current body | |
| CN205593685U (en) | A fiber grating soil pressure sensor for measuring soil pressure | |
| CN104237653A (en) | Sensor for space electric field detection | |
| CN207163633U (en) | A kind of atmospheric pressure measurement apparatus | |
| CN110031672A (en) | Light-duty high precision electro flow measuring apparatus | |
| CN102608380B (en) | Self-induced photoelectric mixed current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20170621 |