CN109633235A - A kind of optical fiber current mutual inductor of multi-parameter sensing - Google Patents
A kind of optical fiber current mutual inductor of multi-parameter sensing Download PDFInfo
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- CN109633235A CN109633235A CN201910046239.5A CN201910046239A CN109633235A CN 109633235 A CN109633235 A CN 109633235A CN 201910046239 A CN201910046239 A CN 201910046239A CN 109633235 A CN109633235 A CN 109633235A
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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
Abstract
The present invention discloses a kind of optical fiber current mutual inductor of multi-parameter sensing, comprising: optical path unit, Fibre Optical Sensor unit and signal processing unit, the optical signal that optical path unit is used to generate light source generate at least two-way modulated optical signal by modulation；Fibre Optical Sensor unit is connect with optical path unit, comprising: current sense module and fiber sensing module；Current sense module reflexes to optical path unit for receiving wherein modulated optical signal generation electric current optical signal all the way；Fiber sensing module reflexes to optical path unit for receiving another way modulated optical signal generation optical fiber optical signal；Electric current optical signal and optical fiber optical signal of the signal processing unit for the input of receiving light path unit generate current signal and fiber optic telecommunications number, and the information wherein carried is demodulated and exported.By applying the present invention, current sense module and fiber sensing module are integrated in Fibre Optical Sensor unit, realize the measurement of many reference amounts signal, improve the integrated level of optical fiber current mutual inductor, reduce the cost of optical fiber current mutual inductor.
Description
Technical field
The present invention relates to technical field of optical fiber detection, and in particular to a kind of optical fiber current mutual inductor of multi-parameter sensing.
Background technique
Current sensor is the key equipment in electric system, is the various safety such as protective relaying device and metering device
Control device provides electric signal.Currently, widely used current sensor is based on electromagnetic induction principle in the power system
Electromagnetic type current sensor.With extra-high voltage, the construction of supergrid, electrical power system transmission power capacity is continuously increased, electricity
Press grade higher and higher, electromagnetic type current sense is no longer satisfied the demand of insulation and measurement.And fibre optic current sensor is gathered around
Have many advantages, such as, it is such as small in size, it is light-weight；Natural electrical insulation capability；Stronger anti-electromagnetic interference capability；Range of dynamic measurement
Greatly；Frequency response range is wide；High sensitivity；It can be with output digit signals etc..Fibre optic current sensor replaces traditional electromagnetism
Formula sensor has become inevitable trend.
But current fibre optic current sensor can only measure current signal, for its for needing to measure in the power system
His signal is helpless, when measuring other signals in the power system, needs to buy a variety of sensing equipments, expensive, collection
It is poor at spending.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of optical fiber current mutual inductor of multi-parameter sensing, it is existing to solve
In technology in other signals of power system measuring, need to buy a variety of sensing equipments, expensive, the problem of integrated level difference.
Technical solution proposed by the present invention is as follows:
The embodiment of the present invention provides a kind of optical fiber current mutual inductor of multi-parameter sensing, which includes:
Optical path unit, Fibre Optical Sensor unit and signal processing unit, wherein the optical path unit is for leading to the optical signal that light source generates
Ovennodulation generates at least two-way modulated optical signal；The Fibre Optical Sensor unit is connect with the optical path unit, the Fibre Optical Sensor
Unit includes: current sense module and fiber sensing module；The current sense module is for receiving the wherein modulation all the way
Optical signal, the magnetic field signal for generating the modulated optical signal by electric current to be measured generate electric current optical signal, and by the electric current
Optical signal reflexes to the optical path unit；The fiber sensing module for receiving modulated optical signal described in another way, by with
Sensing parameter interaction to be measured generates optical fiber optical signal, and the optical fiber optical signal is reflexed to the optical path unit；It is described
Signal processing unit is connect with the optical path unit, and the electric current optical signal for receiving the optical path unit input generates electric current letter
Number, the optical fiber optical signal for receiving the optical path unit input generates fiber optic telecommunications number, to be measured by what is carried in the current signal
The sensing parameter information to be measured carried in electric current and fiber optic telecommunications number is demodulated and is exported.
Further, optical path unit includes sequentially connected circulator and modulator, and the circulator includes three inputs
Output port, first input/output port receive the optical signal that the light source generates, second input/output port with it is described
Modulator connection, third input/output port are connect with the signal processing unit；The modulator is used for described second
The optical signal modulation of a input/output port output generates at least two-way modulated optical signal.
Further, the optical fiber current mutual inductor of the multi-parameter sensing further include: coupler, the coupler receive institute
At least two-way modulated optical signal for stating modulator output couples optical signal through overcoupling output at least two-way.
Further, modulator is Y-branch structure, wherein a connection coupler, another and the coupler
It is set as 90 degree of weldings.
Further, signal processing unit includes detector, and the detector receives the electric current of the optical path unit input
Optical signal generates current signal and the optical fiber optical signal of optical path unit input generates fiber optic telecommunications number.
Further, the current sense module includes sequentially connected ring retard, quarter-wave plate and sensor coil,
The ring retard reception is described, and wherein modulated optical signal, the modulated optical signal of output are generated by the quarter-wave plate all the way
Modulate circularly polarized light；The end of the sensor coil is arranged reflecting mirror, and the modulation circularly polarized light is described in the sensor coil induction
Polarization angle variation is generated under the action of the magnetic field signal that electric current to be measured generates, generates the electric current optical signal, and by the electricity
Optical signal reflexes to the optical path unit by reflecting mirror.
Further, the fiber sensing module include fiber grating temperature sensor, fiber bragg grating pressure sensor and
At least one of F-P cavity partial discharge sensor.
Further, when the fiber sensing module includes multiple sensors, multiple sensor series connections.
Further, when the fiber sensing module includes multiple sensors, multiple sensor parallel connections.
Further, the light source is broad spectrum light source, and the light source includes in SLED light source, LD light source or LED light source
Any one.
Technical solution of the present invention has the effect that
The optical fiber current mutual inductor of multi-parameter sensing provided in an embodiment of the present invention, by the way that fiber sensing module to be integrated in
In Fibre Optical Sensor unit, fiber sensing module and current sense module share an optical path unit and signal processing unit, realize
The measurement of many reference amounts signals such as electric current, improves the technical performance of optical fiber current mutual inductor, improves optical fiber current mutual inductor
Integrated level, avoid different sensing equipments and need independent utility light source and optical device, reduce optical fiber current mutual inductor
Cost solves in the prior art in other signals of power system measuring, needs to buy a variety of sensing equipments, expensive,
The problem of integrated level difference.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural block diagram of the optical fiber current mutual inductor of multi-parameter sensing according to an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the optical fiber current mutual inductor of multi-parameter sensing according to an embodiment of the present invention；
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of optical fiber current mutual inductor of multi-parameter sensing, as shown in Figure 1, the fibre-optic current is mutual
Sensor includes: optical path unit 1, Fibre Optical Sensor unit 2 and signal processing unit 3, wherein optical path unit 1 is for generating light source
Optical signal at least two-way modulated optical signal is generated by modulation；Fibre Optical Sensor unit 2 is connect with optical path unit 1, Fibre Optical Sensor
Unit 2 includes: current sense module 21 and fiber sensing module 22；Current sense module 21 is for receiving wherein modulation light all the way
Signal makes modulated optical signal generate electric current optical signal by the magnetic field signal that electric current to be measured generates, and electric current optical signal is reflected
To optical path unit 1；Fiber sensing module 22 is for receiving another way modulated optical signal, by interacting with sensing parameter to be measured
Optical fiber optical signal is generated, and optical fiber optical signal is reflexed into optical path unit 1；Signal processing unit 3 is connect with optical path unit 1, is used
Current signal is generated in the electric current optical signal that receiving light path unit 1 inputs, the optical fiber optical signal that receiving light path unit 1 inputs generates
Fiber optic telecommunications number demodulate the sensing parameter information to be measured carried in the electric current to be measured and fiber optic telecommunications number that carry in current signal
And it exports.
In a preferred embodiment, the sensing parameter information to be measured carried in the fiber optic telecommunications number may include but unlimited
In: electric current, temperature, pressure and partial discharge etc. sense parameter information.
The optical fiber current mutual inductor of multi-parameter sensing provided in an embodiment of the present invention, by the way that fiber sensing module to be integrated in
In Fibre Optical Sensor unit, fiber sensing module and current sense module share an optical path unit and signal processing unit, realize
The measurement of many reference amounts signals such as electric current, temperature, pressure and partial discharge, improves the technical performance of optical fiber current mutual inductor, improves
The integrated level of optical fiber current mutual inductor, avoids different sensing equipments and needs independent utility light source and optical device, reduce
The cost of optical fiber current mutual inductor solves in the prior art in other signals of power system measuring, needs to buy a variety of biographies
Feel equipment, expensive, the problem of integrated level difference.
As a kind of optional embodiment of the embodiment of the present invention, as shown in Fig. 2, optical path unit 1 includes being sequentially connected
Circulator 12 and modulator 13, wherein circulator 12 includes three input/output ports, and first input/output port A connect
Receive the optical signal that light source 11 generates, second input/output port B connect with modulator 13, third input/output port C and
Signal processing unit 3 connects；Modulator 13 is used to the optical signal modulation of second input/output port B output generating at least two
Road modulated optical signal.
Specifically, first input/output port A of circulator 12 and second input/output port B share a transmission
Channel, after first input/output port A of circulator 12 receives the optical signal that light source 11 generates, the optical signal is from second
Input/output port B output, second input/output port B also share a transmission channel with third input/output port C,
When the electric current optical signal and optical fiber optical signal that second input/output port B reception optical fiber sensing unit 2 returns, the electric current light
Signal and optical fiber optical signal are exported from third input/output port C.Wherein, light source 11 can be broad spectrum light source, light source 11
It can be any one in SLED light source, LD light source or LED light source, the application does not limit this.
As a kind of optional embodiment of the embodiment of the present invention, as shown in Fig. 2, the fibre-optic current of the multi-parameter sensing
Mutual inductor further include: coupler 4, coupler 4 receive at least two-way modulated optical signal that modulator 13 exports, export through overcoupling
At least two-way couples optical signal.Wherein, when modulator 13 is Y-branch structure, wherein a connection coupler 4, another with
Coupler 4 is set as 90 degree of weldings, and modulator 13 can also be straight wave guide or other waveguiding structures, and the type of modulator 13 can be with
It is electro-optic phase modulator, the application does not limit this.
As a kind of optional embodiment of the embodiment of the present invention, as shown in Fig. 2, fiber sensing module 22 includes optical fiber
At least one of grating temperature sensor 221, fiber bragg grating pressure sensor 222 and F-P cavity partial discharge sensor 223.Work as light
When fine sensing module 22 includes multiple sensors, multiple sensors can be series connection, be also possible to be connected in parallel.The application
It does not limit this.
Specifically, when multiple sensor series connect, coupler 4 can be 1 × 2 coupler, i.e. the two of coupler 4 are defeated
Outlet is separately connected current sense module 21 and fiber sensing module 22, the end of current sense module 21 and fiber sensing module
Reflecting mirror is respectively set in 22 end, and optical signal is reflexed to optical path unit 1.When multiple sensor parallels connect, coupler 4 can
Think that 1 × n coupler, i.e. coupler 4 a output end connect current sense module 21, other output ends are separately connected not
Same sensor, reflecting mirror is respectively set in the end of multiple sensors.Multiple sensors can also use series-parallel Hybrid connections,
I.e. multiple sensors can be in any combination.Wherein, fiber grating temperature sensor 221, optical fiber light are removed in fiber sensing module 22
It can also include other sensors except grid voltage force snesor 222 and F-P cavity partial discharge sensor 223, such as strain transducer,
The application does not limit this.
As a kind of optional embodiment of the embodiment of the present invention, as shown in Fig. 2, current sense module 21 includes successively
Ring retard 211, quarter-wave plate 212 and the sensor coil 213 of connection, ring retard 211 receive wherein modulated optical signal all the way,
The modulated optical signal of output generates modulation circularly polarized light by quarter-wave plate 212；Reflection is arranged in the end of sensor coil 213
Mirror, modulation circularly polarized light generate polarization angle under the action of sensor coil 213 incudes the magnetic field signal of electric current generation to be measured and become
Change, generates electric current optical signal, and electric current optical signal is reflexed into optical path unit 1 by reflecting mirror.
As a kind of optional embodiment of the embodiment of the present invention, as shown in Fig. 2, signal processing unit 3 includes detection
Device 31, the electric current optical signal of 31 receiving light path unit 1 of detector input generate the optical fiber that current signal and optical path unit 1 input
Optical signal generates fiber optic telecommunications number.Specifically, signal processing unit 3 further includes signal processing circuit, signal processing circuit connection
Detector 31, the electric current to be measured carried in the current signal for generating detector 31 and carries to be measured in fiber optic telecommunications number
Sensing parameter information is demodulated and is exported.Wherein, the sensing parameter to be measured of carrying may include the parameters such as temperature, pressure, partial discharge,
It may include other parameters, the application does not limit this.
As a kind of optional embodiment of the embodiment of the present invention, the light of multi-parameter sensing provided in an embodiment of the present invention
Fiber current mutual inductor can in following manner measure parameter to be measured:
The light that light source 11 issues enters from first input/output port A of circulator 12, from second input/output terminal
Mouth B is exported to modulator 13, and the modulated optical signal that modulator 13 exports is segmented into two-way, wherein it is input to coupler 4 all the way,
In addition coupler 4 is input to after 90 degree of weldings all the way；Being input to the modulated optical signal of coupler 4, to be segmented into two-way defeated
Out, wherein being input to current sense module 21 all the way, it is in addition input to fiber sensing module 22 all the way.
The modulated optical signal of input current sensing module 21 successively passes through ring retard 211, quarter-wave plate 212 and quick
Feel coil 213, incude generation polarization angle variation under the action of the magnetic field signal that electric current to be measured generates, generate electric current optical signal,
And electric current optical signal is reflexed into optical path unit 1 by reflecting mirror, the electric current optical signal of return light path unit 1 passes through circulator 12
Second input/output port B input, third input/output port C are exported to detector 31.
The modulated optical signal of input optical fibre sensing module 22 successively passes through fiber grating temperature sensor 221, fiber grating
Pressure sensor 222 and F-P cavity partial discharge sensor 223 generate so that modulated optical signal carries temperature, pressure and partial discharge information
Optical fiber optical signal, and optical path unit 1, return light path unit 1 are reflexed to by the reflecting mirror of 223 end of F-P cavity partial discharge sensor
Optical fiber optical signal by circulator 12 second input/output port B input, third input/output port C is exported to detection
Device 31.
The electric current optical signal and optical fiber optical signal of 31 receiving light path unit 1 of detector input, produce according to the electric current optical signal
Raw current signal generates fiber optic telecommunications number according to the optical fiber optical signal, current signal and optical fiber optical signal is exported to signal
Circuit is managed, in the electric current to be measured and fiber optic telecommunications number that signal processing circuit is used to carry in current signal that detector 31 generates
Temperature, pressure and the partial discharge information of carrying are demodulated and are exported.
The measurement method of the optical fiber current mutual inductor of the multi-parameter sensing provided in above embodiment is that the present invention is real
One of example embodiment is applied, the measurement of the optical fiber current mutual inductor of multi-parameter sensing can also be realized by other methods,
The application does not limit this.
The optical fiber current mutual inductor of multi-parameter sensing provided in an embodiment of the present invention, by the way that fiber sensing module to be integrated in
In Fibre Optical Sensor unit, fiber sensing module and current sense module share an optical path unit and signal processing unit, realize
The measurement of many reference amounts signals such as electric current, temperature, pressure and partial discharge, improves the technical performance of optical fiber current mutual inductor, improves
The integrated level of optical fiber current mutual inductor, avoids different sensing equipments and needs independent utility light source and optical device, reduce
The cost of optical fiber current mutual inductor solves in the prior art in other signals of power system measuring, needs to buy a variety of biographies
Feel equipment, expensive, the problem of integrated level difference.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where make various modifications and variations, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (10)
1. a kind of optical fiber current mutual inductor of multi-parameter sensing characterized by comprising optical path unit, Fibre Optical Sensor unit and
Signal processing unit, wherein
The optical signal that the optical path unit is used to generate light source generates at least two-way modulated optical signal by modulation；
The Fibre Optical Sensor unit is connect with the optical path unit, and the Fibre Optical Sensor unit includes: current sense module and light
Fine sensing module；
The current sense module makes the modulated optical signal pass through electricity to be measured for receiving wherein the modulated optical signal all the way
The raw magnetic field signal of miscarriage generates electric current optical signal, and the electric current optical signal is reflexed to the optical path unit；
The fiber sensing module is produced for receiving modulated optical signal described in another way by interacting with sensing parameter to be measured
Third contact of a total solar or lunar eclipse fibre optical signal, and the optical fiber optical signal is reflexed into the optical path unit；
The signal processing unit is connect with the optical path unit, and the electric current optical signal for receiving the optical path unit input produces
Raw current signal, the optical fiber optical signal for receiving the optical path unit input generate fiber optic telecommunications number, will take in the current signal
The sensing parameter information to be measured carried in the electric current to be measured and fiber optic telecommunications number of band is demodulated and is exported.
2. the optical fiber current mutual inductor of multi-parameter sensing according to claim 1, which is characterized in that the optical path unit packet
Sequentially connected circulator and modulator are included,
The circulator includes three input/output ports, and first input/output port receives the light letter that the light source generates
Number, second input/output port is connect with the modulator, and third input/output port and the signal processing unit connect
It connects；
The optical signal modulation that the modulator is used to export second input/output port generates at least two-way tune
Optical signal processed.
3. the optical fiber current mutual inductor of multi-parameter sensing according to claim 2, which is characterized in that further include: coupler,
The coupler receives at least two-way modulated optical signal of the modulator output, through overcoupling output at least two-way coupling light letter
Number.
4. the optical fiber current mutual inductor of multi-parameter sensing according to claim 3, which is characterized in that the modulator is Y
Branched structure, wherein a connection coupler, another is set as 90 degree of weldings with the coupler.
5. the optical fiber current mutual inductor of multi-parameter sensing according to claim 4, which is characterized in that the signal processing list
Member includes detector, and the electric current optical signal that the detector receives the optical path unit input generates current signal and the light
The optical fiber optical signal of road unit input generates fiber optic telecommunications number.
6. the optical fiber current mutual inductor of multi-parameter sensing according to claim 1-5, which is characterized in that described
Current sense module includes sequentially connected ring retard, quarter-wave plate and sensor coil,
The ring retard reception is described, and wherein modulated optical signal, the modulated optical signal of output pass through the quarter-wave plate all the way
Generate modulation circularly polarized light；
Reflecting mirror is arranged in the end of the sensor coil, and the modulation circularly polarized light is produced in the sensor coil induction electric current to be measured
Polarization angle variation is generated under the action of raw magnetic field signal, generates the electric current optical signal, and the electric current optical signal is led to
It crosses reflecting mirror and reflexes to the optical path unit.
7. the optical fiber current mutual inductor of multi-parameter sensing according to claim 1-6, which is characterized in that described
Fiber sensing module include in fiber grating temperature sensor, fiber bragg grating pressure sensor and F-P cavity partial discharge sensor extremely
It is one few.
8. the optical fiber current mutual inductor of multi-parameter sensing according to claim 7, which is characterized in that the Fibre Optical Sensor mould
When block includes multiple sensors, multiple sensor series connections.
9. the optical fiber current mutual inductor of multi-parameter sensing according to claim 7, which is characterized in that the Fibre Optical Sensor mould
When block includes multiple sensors, multiple sensor parallel connections.
10. the optical fiber current mutual inductor of -9 described in any item multi-parameter sensings according to claim 1, which is characterized in that described
Light source is broad spectrum light source, and the light source includes any one in SLED light source, LD light source or LED light source.
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| CN201910046239.5A CN109633235A (en) | 2019-01-17 | 2019-01-17 | A kind of optical fiber current mutual inductor of multi-parameter sensing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542789A (en) * | 2019-09-26 | 2019-12-06 | 国网重庆市电力公司电力科学研究院 | Optical fiber current sensor and acquisition device |
| CN111724983A (en) * | 2020-06-09 | 2020-09-29 | 山东电力设备有限公司 | Transformer with multi-parameter all-fiber sensing function and multi-parameter monitoring method |
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| CN102128967A (en) * | 2010-12-15 | 2011-07-20 | 北京航空航天大学 | Optical fiber current transformer for three-phase common super-fluorescence optical fiber light source |
| CN103116055A (en) * | 2013-01-29 | 2013-05-22 | 长飞光纤光缆有限公司 | All-optical-fiber current transformer system with temperature measurement function |
| CN104535819A (en) * | 2015-01-09 | 2015-04-22 | 胡雨亭 | Polarization error restraining device and method for Y waveguide loop of optical current transformer |
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| CN102128967A (en) * | 2010-12-15 | 2011-07-20 | 北京航空航天大学 | Optical fiber current transformer for three-phase common super-fluorescence optical fiber light source |
| CN103116055A (en) * | 2013-01-29 | 2013-05-22 | 长飞光纤光缆有限公司 | All-optical-fiber current transformer system with temperature measurement function |
| CN104535819A (en) * | 2015-01-09 | 2015-04-22 | 胡雨亭 | Polarization error restraining device and method for Y waveguide loop of optical current transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110542789A (en) * | 2019-09-26 | 2019-12-06 | 国网重庆市电力公司电力科学研究院 | Optical fiber current sensor and acquisition device |
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