CN110470890A - A kind of current probe based on noble metal nano wire waveguide - Google Patents
A kind of current probe based on noble metal nano wire waveguide Download PDFInfo
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- CN110470890A CN110470890A CN201910898736.8A CN201910898736A CN110470890A CN 110470890 A CN110470890 A CN 110470890A CN 201910898736 A CN201910898736 A CN 201910898736A CN 110470890 A CN110470890 A CN 110470890A
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- noble metal
- nano wire
- metal nano
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to a kind of current probes based on noble metal nano wire waveguide, the current probe includes substrate and detection device, detection device is placed on the substrate, detection device includes noble metal nano wire, electrode, excitation portion, probe portion, cavity and magnetic fluid, the both ends of noble metal nano wire are arranged in electrode, excitation portion and probe portion are respectively arranged at the inside of two electrodes, cavity is made of earth silicon material, cavity is placed in the middle position in excitation portion and probe portion and is in the side of noble metal nano wire, and magnetic fluid is arranged in cavity.When electric current to be measured passes through noble metal nano wire, magnetic field is generated at magnetic fluid, which changes the refractive index of magnetic fluid, further change the resonant wavelength of cavity, which reflects current strength, to realize the purpose of probe current.The current probe has many advantages, such as that structure size is small, detectivity is high.
Description
Technical field
The present invention relates to gallon fields, and in particular to a kind of current probe based on noble metal nano wire waveguide.
Background technique
Current detection technique is the important technology of power system security, system stable operation.Conventional current Detection Techniques are
Induction current transformer, systems bulky can not achieve the detection of microcosmic and weak current.
Gallon based on optical principle has many advantages, such as that anti-electromagnetic interference capability is strong, and it is accurate to measure.Tradition is based on light
The current probe for learning principle is all based on optical fiber structure, and the birefringence effect of optical fiber reduces the detection of such detector
Energy.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of current probe based on noble metal nano wire waveguide, the electricity
Flux detector includes substrate and detection device, and detection device is placed on the substrate, and detection device includes noble metal nano wire, electricity
The both ends of noble metal nano wire, excitation portion and probe portion difference is arranged in pole, excitation portion, probe portion, cavity and magnetic fluid, electrode
It is set to the inside of two electrodes, cavity is made of earth silicon material, and cavity is placed in the middle position, simultaneously in excitation portion and probe portion
And it is in the side of noble metal nano wire, magnetic fluid is set in cavity.
Further, substrate is magnesium fluoride crystal, and magnetic fluid is water base ferroferric oxide magnetic fluid, noble metal nano wire
Material be gold or silver.
Further, cavity is the bar shaped along noble metal nano wire direction.
Further, cavity is trapezoidal, and two trapezoidal bottom edges are parallel to noble metal nano wire direction, receive by near noble metal
The bottom side length of short, the separate noble metal nano wire in the bottom edge of rice noodles.
Further, cavity is rectangle, and the long edge noble metal nano wire direction of rectangle.
Further, there is partition, and the direction of partition is along noble metal nano wire direction in cavity.
Further, the material of partition is earth silicon material.
Further, the thickness of partition is less than 100 nanometers.
Beneficial effects of the present invention: the present invention provides a kind of current probe based on noble metal nano wire waveguide, In
Cavity is arranged in noble metal nano wire side, and magnetic fluid is arranged in cavity, and excitation portion is excited along the surface that noble metal nano wire is propagated
Deng from polariton, probe portion detects the surface plasmon-polarition, when electric current to be measured passes through noble metal nano wire, in magnetic fluid
Place generates magnetic field, which changes the refractive index of magnetic fluid, further change the resonant wavelength of cavity, which reflects
Current strength, to realize the purpose of probe current.The current probe does not need in addition to be arranged to the conducting wire by electric current,
Realize multi-purpose content.In addition, current probe provided by the invention is by detection noble metal nano wire upper surface etc. from pole
The variation for changing excimer, realizes the purpose of probe current, so the current probe has structure size is small, detectivity is high etc.
Advantage.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the schematic diagram one of the current probe based on noble metal nano wire waveguide.
Fig. 2 is the schematic diagram two of the current probe based on noble metal nano wire waveguide.
Fig. 3 is the schematic diagram three of the current probe based on noble metal nano wire waveguide.
In figure: 1, noble metal nano wire；2, electrode；3, excitation portion；4, probe portion；5, cavity；6, magnetic fluid；7, partition.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the present invention is further explained, below in conjunction with attached drawing and reality
Example is applied to a specific embodiment of the invention, structure feature and its effect, detailed description are as follows.
Embodiment 1
The present invention provides a kind of current probe based on noble metal nano wire waveguide as shown in Figure 1, the current probes
Including substrate and detection device, substrate is magnesium fluoride crystal, and detection device is placed on substrate, and detection device includes noble metal nano
Line 1, electrode 2, excitation portion 3, probe portion 4, cavity 5 and magnetic fluid 6.The material of noble metal nano wire 1 is gold or silver.Electrode 2 is set
It sets at the both ends of noble metal nano wire 1, excitation portion 3 and probe portion 4 are respectively arranged at the inside of two electrodes.In use, excitation
For excitating surface etc. from polariton, excitation portion 3 can be oblique incidence to noble metal nano wire 1 on noble metal nano wire 1 in portion 3
On incident light, excitation portion 3 is also possible to the tapered fiber close to noble metal nano wire 1, after light penetrates tapered fiber, in your gold
Excitating surface etc. is from polariton on category nano wire 1.Probe portion 4 detects the surface plasmon-polarition on noble metal nano wire 1,
Probe portion 4 can be optical fiber probe, and surface plasmon-polarition is collected by optical fiber probe.Cavity 5 is made of earth silicon material,
Cavity 5 is placed in the middle position in excitation portion 3 and probe portion 4 and is in the side of noble metal nano wire 1.In practical applications,
Cavity 5 may not be the middle position that excitation portion 3 and probe portion 4 is just arranged in, and a little middle position of deviateing can also be with,
Have no effect on Effect on Detecting.In practical application, cavity 5 can be the various shapes such as rectangular, rectangle or circle.It is set in cavity 5
Set magnetic fluid 6.Magnetic fluid 6 is water base ferroferric oxide magnetic fluid.When carrying out gallon, electric current is flowed through by two electrodes 2
Noble metal nano wire 1, generates magnetic field at magnetic fluid 6, which changes the refractive index of magnetic fluid 6, further change cavity 5
Resonant wavelength, the resonant wavelength reflect current strength, to realize the purpose of probe current.The current probe does not need separately
It is outer to be arranged to the conducting wire by electric current, realize multi-purpose content.In addition, current probe provided by the invention is to pass through detection
The variation from polariton such as 1 upper surface of noble metal nano wire, realizes the purpose of probe current, so the current probe has
The advantages that structure size is small, detectivity is high.
Embodiment 2
On the basis of embodiment 1, as shown in Fig. 2, cavity 5 is bar shaped, the direction of bar shaped is along the direction of noble metal nano wire 1.
Since when electric current excites magnetic field, the close local magnetic field of distance of wire is strong；The remote local magnetic field of distance of wire is weak, and this programme will be empty
Chamber 5 is designed as bar shaped, ensure that the relatively uniform of magnetic field in cavity 5, so that the refractive index of magnetic fluid 6 is relatively uniform, from
And ensure that the width of resonant frequency is smaller, the resonance paddy with smaller width, to improve the sensitivity of gallon.
Embodiment 3
On the basis of embodiment 1, cavity 5 is trapezoidal, and two trapezoidal bottom edges are parallel to the direction of noble metal nano wire 1, and
Bottom side length short close to the bottom of noble metal nano wire 1, far from noble metal nano wire 1.Because of the ground far from noble metal nano wire 1
Side, magnetic field is weak, and the refractive index of magnetic fluid is small；Close to the place of noble metal nano wire 1, magnetic field is strong, and the refractive index of magnetic fluid is big, is
Guarantee in the equivalent optical path along 1 direction of noble metal nano wire, so the bottom edge for needing will be far from noble metal nano wire 1 is designed
It is longer；The bottom edge that will be close to noble metal nano wire 1 is designed shorter.In this way, ensure that identical light path in cavity 5, protect
Identical resonant frequency in cavity 5 has been demonstrate,proved, so that resonance paddy is narrower, has improved the sensitivity of detection.
Embodiment 4
On the basis of embodiment 1, as shown in figure 3, cavity 5 is rectangle, and the side of the long edge noble metal nano wire 1 of rectangle
To.There is partition 7, and the direction of partition 7 is along the direction of the noble metal nano wire 1 in cavity 5.The material of partition 7 is two
Silica material.The thickness of partition 7 is less than 100 nanometers.Partition 7 by cavity 5 be divided into along 1 direction of noble metal nano wire it is parallel two
A bar shaped resonant cavity: the bar shaped resonant cavity one close to noble metal nano wire 1 and the bar shaped resonant cavity far from noble metal nano wire 1
Two.In use, surface plasmon-polarition is coupled into bar shaped resonant cavity one first, item is then coupled by partition 7
Shape resonant cavity two.In practical applications, can be by baffle design near rectangle middle position, the resonance wave of two bar shaped resonant cavities
It is long very close to so, forming two resonance modes, the coupling of two resonance modes generates method promise resonance, is formed narrower saturating
Paddy is penetrated, to provide more highly sensitive gallon.
In addition, partition 7 is also designed to precious metal material, the thickness of partition 7 is less than 80 nanometers, in order to which light is from bar shaped
Resonant cavity one is coupled into bar shaped resonant cavity two.The partition 7 of precious metal material is conducive to form the table along partition 7 in cavity 5
Face plasmon resonance, when the surface plasmon resonance occurs, probe portion 4 detects transmission paddy.Due to the surface etc. from
Plasmon resonance depends heavily on the refractive index of its ambient enviroment, thus the partition 7 being made of precious metal material will lead to it is narrower
Transmission paddy, to improve the sensitivity of gallon.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, In
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (8)
1. a kind of current probe based on noble metal nano wire waveguide, which is characterized in that described to be based on noble metal nano wire wave
The current probe led includes: substrate and detection device, and the detection device is placed on the substrate, and the detection device includes
The noble metal nano wire is arranged in noble metal nano wire, electrode, excitation portion, probe portion, cavity and magnetic fluid, the electrode
Both ends, the excitation portion and the probe portion are respectively arranged at the inside of two electrodes, and the cavity is made of earth silicon material,
The cavity is placed in the middle position in the excitation portion and the probe portion and is in the side of the noble metal nano wire,
The setting magnetic fluid in the cavity.
2. the current probe as described in claim 1 based on noble metal nano wire waveguide, it is characterised in that: the substrate is
Magnesium fluoride crystal, the magnetic fluid are water base ferroferric oxide magnetic fluid, and the material of the noble metal nano wire is gold or silver.
3. the current probe as claimed in claim 2 based on noble metal nano wire waveguide, it is characterised in that: the cavity is
Bar shaped along the noble metal nano wire direction.
4. the current probe as claimed in claim 2 based on noble metal nano wire waveguide, it is characterised in that: the cavity is
Trapezoidal, two trapezoidal bottom edges are parallel to the noble metal nano wire direction, and the bottom edge close to the noble metal nano wire is short, separate
The bottom side length of the noble metal nano wire.
5. the current probe as claimed in claim 2 based on noble metal nano wire waveguide, it is characterised in that: the cavity is
Rectangle, and noble metal nano wire direction described in the long edge of rectangle.
6. the current probe as claimed in claim 5 based on noble metal nano wire waveguide, it is characterised in that: in the cavity
With partition, and the direction of partition is along the noble metal nano wire direction.
7. the current probe as claimed in claim 6 based on noble metal nano wire waveguide, it is characterised in that: the partition
Material is earth silicon material.
8. the current probe as claimed in claim 7 based on noble metal nano wire waveguide, it is characterised in that: the partition
Thickness is less than 100 nanometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898736.8A CN110470890A (en) | 2019-09-23 | 2019-09-23 | A kind of current probe based on noble metal nano wire waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898736.8A CN110470890A (en) | 2019-09-23 | 2019-09-23 | A kind of current probe based on noble metal nano wire waveguide |
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| Publication Number | Publication Date |
|---|---|
| CN110470890A true CN110470890A (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910898736.8A Withdrawn CN110470890A (en) | 2019-09-23 | 2019-09-23 | A kind of current probe based on noble metal nano wire waveguide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579847A (en) * | 2020-04-30 | 2020-08-25 | 杭州电子科技大学 | Double-enhancement current sensing system based on micro fiber junctions and magnetic fluid |
-
2019
- 2019-09-23 CN CN201910898736.8A patent/CN110470890A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579847A (en) * | 2020-04-30 | 2020-08-25 | 杭州电子科技大学 | Double-enhancement current sensing system based on micro fiber junctions and magnetic fluid |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191119 |
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| WW01 | Invention patent application withdrawn after publication |