CN107402320A - A kind of reflection-type intensity modulated multi-core fiber current sensing system - Google Patents

A kind of reflection-type intensity modulated multi-core fiber current sensing system Download PDF

Info

Publication number
CN107402320A
CN107402320A CN201710548882.9A CN201710548882A CN107402320A CN 107402320 A CN107402320 A CN 107402320A CN 201710548882 A CN201710548882 A CN 201710548882A CN 107402320 A CN107402320 A CN 107402320A
Authority
CN
China
Prior art keywords
core fiber
signal
reflection
composite
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710548882.9A
Other languages
Chinese (zh)
Other versions
CN107402320B (en
Inventor
付松年
杨正
姜智升
唐明
朱本鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
Original Assignee
Huazhong University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN201710548882.9A priority Critical patent/CN107402320B/en
Publication of CN107402320A publication Critical patent/CN107402320A/en
Application granted granted Critical
Publication of CN107402320B publication Critical patent/CN107402320B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/24Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Optical Transform (AREA)

Abstract

The invention discloses a kind of reflection-type intensity modulated multi-core fiber current sensing system, including:Optical emitting module, optical signal modulation module, multicore optical fiber coupler, multi-core fiber, electromagnetic susceptibility composite, photodetector and electronic signal processing module;One end of multi-core fiber is connected with one end of the multicore optical fiber coupler, and the other end of multi-core fiber keeps certain distance with the reflecting surface of electromagnetic susceptibility composite, and electromagnetic susceptibility composite is connected in power system to be measured.Present system has the advantages that electromagnetism interference is strong, safe, cost is cheap, flexible structure and good reliability, at the same can measure direct current signal also can Measuring Alternating Current Signal, can be also combined with different composite material, realize the measurement of other physical parameters.

Description

A kind of reflection-type intensity modulated multi-core fiber current sensing system
Technical field
The invention belongs to sensory field of optic fibre, is passed more particularly, to a kind of reflection-type intensity modulated multi-core fiber electric current Sensing system.
Background technology
Intelligent grid is the intellectuality of power network, is referred to as " power network 2.0 ", being built upon integrated high-speed bidirectional communication network On the basis of, by advanced sensing, measurement, control, equipment and DSS technology, realize reliable power network, safety, economy, Efficiently, green use.In intelligent grid, sensing equipment will monitor the information such as voltage x current in network system in real time, with reference to Communication, automatic control technology etc. organically blend with power network infrastructure, and acquisition power network panoramic information, prevention is with finding event in time Barrier, and failure is quickly isolated, realize self-recovery.Therefore, efficient, accurate, energy-conservation sensor-based system is the pass in intelligent grid Key link.
Sensing equipment is mainly electrical sensor used by power network at present, and input/output signal is electric signal, such as electricity Pressure sensor can be divided into resitstance voltage divider, capacitive divider, electromagnetic potential transformer, capacitance type potential transformer and Hall Voltage sensor etc., current sensor are divided into current divider, electromagnetic current transducer and electronic current mutual inductor etc..Multiple In the case of strays magnetic environment or over long distances transmission, signal acquisition and the transmission of electrical sensor will become difficult;And transducing part It is active device, operability and security are all poor, are to meet insulating requirements in high voltage and current circuit, it is necessary to complicated Process meanses.In addition, traditional electrical sensor needs to be coupled into examining system, its accuracy can be by voltage x current water The influence of many factors such as flat, frequency fluctuation, the fluctuation of load, remanent magnetism, geomagnetic induction current.
With the development of optic fibre manufacture process, people, which start to explore, to attempt to imitate using the i.e. Faraday of magneto-optic effect of medium Electromagnetic induction principle should be substituted to carry out the measurement of electric current.Current most fibre optic current sensor is to utilize Faraday Effect realizes sensing, and the current measuring device of information transfer is completed using optical fiber.Influenceed by factors such as fiber birefringences, Fibre-optic current voltage sensor has much room for improvement in reliability, stability and measurement accuracy etc. at present, and is only limitted to measure Direct current signal, ripe practical product is seldom, most of principle prototype stage for all resting on laboratory.
As can be seen here, there is not high poor security, poor anti jamming capability, accuracy, poor reliability and only limit in prior art In the technical problem of measurement direct current signal.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of reflection-type intensity modulated multi-core optical Fine current sensing system, thus solve prior art and have that poor security, poor anti jamming capability, accuracy be high, poor reliability And it is only limitted to measure the technical problem of direct current signal.
To achieve the above object, the invention provides a kind of reflection-type intensity modulated multi-core fiber current sensing system, bag Include:
Optical emitting module, optical signal modulation module, multicore optical fiber coupler, multi-core fiber, electromagnetic susceptibility composite wood Material, photodetector and electronic signal processing module;
Multicore optical fiber coupler includes N number of single parallel branch, and the multi-core fiber includes N number of fibre core, N >=2;
The output end of optical emitting module is parallel by n single of optical signal modulation module and multicore optical fiber coupler Branch road connects, 1≤n < N;
Other (N-n) individual single parallel branch of multicore optical fiber coupler passes through the photodetector and the electric signal The input of processing module is connected;
One end of multi-core fiber is connected with one end of the multicore optical fiber coupler, and the other end and electromagnetism of multi-core fiber are quick The reflecting surface for feeling composite keeps certain distance, and the electromagnetic susceptibility composite is connected in power system to be measured.
Further, electromagnetic susceptibility composite receives the DC signal generation fixed displacement of power system to be measured, connects The AC signal for receiving power system to be measured produces the mechanical oscillation of same frequency, electromagnetic susceptibility composite and multi-core fiber end face away from It is less than 5 ° from less than 10mm, angle.
Further, at work, optical emitting module produces light beam and adjusted via optical signal modulation module system System produces flashlight, the n single parallel branch and the n fibre core connection of multi-core fiber and transmission signal of multicore optical fiber coupler Light, flashlight are emitted to electromagnetic susceptibility composite material surface in multi-core fiber end face and reflected, (N-n) in addition of multi-core fiber Individual fibre core receives reflected light, and is connected transmission reflected light extremely with (N-n) in addition individual single parallel branch of multicore optical fiber coupler Photodetector carries out opto-electronic conversion, and obtained electric signal handles to obtain received optical power through electronic signal processing module, using connecing Displacement caused by the fixed displacement of receipts luminous power acquisition electromagnetic susceptibility composite or mechanical oscillation, it is compound with reference to electromagnetic susceptibility The magnetostrictive effect of material obtains the information about power to be measured of power system to be measured.
Further, electronic signal processing module includes:Amplifying circuit, bandpass filter, phase-sensitive detection circuit, LPF Device, analog-digital converter and host computer processing module, amplifying circuit and bandpass filter carry out tentatively amplification and denoising to electric signal, Enter horizontal lock amplification to signal frequency through phase-sensitive detection circuit, then after filtering out most of noise by low-pass filter circuit, by modulus Converter is converted to data signal and handled in host computer processing module, obtains received optical power.
Further, host computer processing module includes data acquisition circuit, data transmission circuit, data processing module, number Data signal is obtained according to Acquisition Circuit, is transmitted by data transmission circuit and received optical power is obtained into data processing module.
Further, optical emitting module is incoherent light source, including:LED, wideband light source and ASE light sources.
Preferably, optical emitting module LED.
Further, optical signal modulation module includes drive circuit and modulation circuit, and drive circuit passes through light for limitation The current output signal light in source, modulation circuit are used for the stable flashlight of reception signal light output.
Further, photodetector is PIN photodiode or APD avalanche diodes.
Preferably, photodetector is PIN photodiode.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show Beneficial effect:
(1) it is significantly simple due to the working method of the invention that reflection-type intensity modulated is realized using electromagnetic susceptibility composite Change design structure, reduce cost;One fibre core represents a passage, using the independence of multi-core fiber multichannel, improves System sensitivity and measurement range, and can adjust transmitting-receiving structure according to the actual requirements, the flexibility with physical layer;Utilize The passivity of multi-core fiber and electromagnetic susceptibility composite, improve anti-electromagnetic interference capability, the safety and reliability of system.
(2) preferably, based on magnetostrictive effect, under suitable boundary condition, electromagnetic susceptibility material is to direct current telecommunications The displacement of fixation number can be produced, the mechanical oscillation of same frequency can be produced to AC signal, therefore the system can measure direct current letter Number, also can Measuring Alternating Current Signal;This system is combined with other composites, the measurement of other physical parameters can also be realized, The inverse piezoelectric effect of piezoelectric ceramics is such as utilized, the measurement to voltage signal can be achieved.
(3) preferably, electromagnetic susceptibility composite is less than 10mm with multi-core fiber end face distance, and angle is less than 5 °, tied Ensure the accuracy of measurement while structure is compact, the present system for being reaches best effort effect.
(4) preferably, because LED light source is easy to use, small volume, cost are low, long lifespan, working stability, it is more suitable for In sensor-based system.PIN diode manufacturing process is simple, and cost is low, and operating voltage is low, and noise robustness is good, in being applied to, short distance From detection system.
Brief description of the drawings
Fig. 1 is that a kind of structure of reflection-type intensity modulated multi-core fiber current sensing system provided in an embodiment of the present invention is shown It is intended to;
Fig. 2 is multi-core fiber end view drawing provided in an embodiment of the present invention;
Fig. 3 is the linear magnetostriction rate of embodiment offer with external magnetic field strength variation relation curve synoptic diagram;
Fig. 4 is the received optical power of embodiment offer with reflecting surface displacement variation relation curve synoptic diagram.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below Conflict can is not formed each other to be mutually combined.
As shown in figure 1, the invention provides a kind of reflection-type intensity modulated multi-core fiber current sensing system, including:
Optical emitting module 1, optical signal modulation module 2, multicore optical fiber coupler 3, multi-core fiber 4, electromagnetic susceptibility are multiple Condensation material 5, photodetector 6 and electronic signal processing module 7;
Multicore optical fiber coupler 3 includes N number of single parallel branch, and the multi-core fiber 4 includes N number of fibre core, N >=2;
The output end of optical emitting module 1 passes through optical signal modulation module 2 and n single of multicore optical fiber coupler 3 Parallel branch connects, 1≤n < N;The intrinsic insertion loss of whole device is less than 2dB;
Other (N-n) individual single parallel branch of multicore optical fiber coupler 3 passes through the photodetector 6 and the telecommunications The input of number processing module 7 is connected;
One end of the multi-core fiber 4 is connected with one end of the multicore optical fiber coupler 3, the other end of multi-core fiber 4 Certain distance is kept with the reflecting surface of electromagnetic susceptibility composite 5, the electromagnetic susceptibility composite 5 is connected to power train to be measured In system.
In embodiments of the present invention, electromagnetic susceptibility composite 5 receives the DC signal generation of power system to be measured admittedly Positioning moves, and the AC signal for receiving power system to be measured produces the mechanical oscillation of same frequency, electromagnetic susceptibility composite 5 and multicore Fiber end face distance is less than 10mm, and angle is less than 5 °.
When the electromagnetic susceptibility composite is connected in power system to be measured, magnetic field is produced by electric field to be measured, in magnetic Under field action, ferromagnetic crystal is magnetized, and macroscopically shows as elongating or shortening for linear dimension, i.e. linear magnetostriction effect. For DC signal to be measured, D.C. magnetic field can be produced through electromagnetic material such as coil etc., the electromagnetic susceptibility composite is straight Certain displacement is produced under stream magnetic fields;AC signal can produce alternating magnetic field, the electromagnetic susceptibility composite occur anti- Elongate or shorten again, so as to which electric signal to be measured is changed into micro-displacement.Because linear magnetostriction direction is unrelated with magnetic direction, The vibration frequency of the electromagnetic susceptibility composite is unrelated with magnetic direction under AC signal to be measured effect, therefore vibration frequency For twice of measured signal, i.e. frequency-doubled effect;DC signal or permanent magnet can be utilized to produce one suitably in practice Constant bias magnetic field, make vibration frequency identical with measured signal.
During the micro-displacement of electromagnetic susceptibility composite, mainly due to being anti-when the end face of the electromagnetic susceptibility composite Face is penetrated, when reflection line position changes, the light field on outgoing optical transport to the reflecting surface of the multi-core fiber transmission channel end face Distribution can change, and the optical field distribution through transmission and reflection to multi-core fiber receiving channel end can also change, so as to Change received optical power, when the timing of other specification one of sensor-based system, received optical power size are only compound with the electromagnetic susceptibility The displacement of material is relevant, therefore measurement received optical power can just obtain the displacement of the electromagnetic susceptibility composite, so as to Information about power to be measured is measured indirectly.
In embodiments of the present invention, at work, optical emitting module 1 produces light beam via optical signal modulation mould to system Block 2 is modulated generation flashlight, and n single parallel branch of multicore optical fiber coupler 3 connects with n fibre core of multi-core fiber 4 Connect and transmission signal light, flashlight are emitted to the surface of electromagnetic susceptibility composite 5 in the end face of multi-core fiber 4 and reflected, multicore Fiber end face schematic diagram receives reflected light, and and multicore optical fiber coupler referring to Fig. 2, (N-n) in addition individual fibre core of multi-core fiber 4 3 (N-n) in addition individual single parallel branch connection transmission reflected light to photodetector 6 carries out opto-electronic conversion, obtained telecommunications Number handled through electronic signal processing module 7 and to obtain received optical power, utilize received optical power to obtain consolidating for electromagnetic susceptibility composite 5 Displacement caused by positioning shifting or mechanical oscillation, power train to be measured is obtained with reference to the magnetostrictive effect of electromagnetic susceptibility composite The information about power to be measured of system.
In embodiments of the present invention, electronic signal processing module 7 includes:Amplifying circuit, bandpass filter, phase sensitive detection electricity Road, low pass filter, analog-digital converter and host computer processing module, amplifying circuit and bandpass filter carry out preliminary to electric signal Amplification and denoising, enter horizontal lock amplification to signal frequency through phase-sensitive detection circuit, then most of make an uproar is filtered out by low-pass filter circuit After sound, data signal is converted to by analog-digital converter and is handled in host computer processing module, obtains received optical power.
In embodiments of the present invention, host computer processing module includes data acquisition circuit, data transmission circuit, data processing Module, data acquisition circuit obtain data signal, are transmitted by data transmission circuit and obtain receiving light work(into data processing module Rate.
In embodiments of the present invention, optical emitting module 1 is incoherent light source, including:LED, wideband light source and ASE light Source.
In embodiments of the present invention, it is preferred that optical emitting module 1 is LED.
In embodiments of the present invention, optical signal modulation module 2 includes drive circuit and modulation circuit, and drive circuit is used to limit System passes through the current output signal light of light source, the modulation circuit flashlight stable for reception signal light output.
In embodiments of the present invention, photodetector 6 is PIN photodiode or APD avalanche diodes.
In embodiments of the present invention, it is preferred that photodetector 6 is PIN photodiode.
Electromagnetic susceptibility composite is connected in power system to be measured, due to linear magnetostriction effect, its reflecting surface position Shifting amount changes with curent change to be measured;Reflecting surface displacement can be modulated to optical fiber receiving power simultaneously, be connect by analysis The information such as electric current to be measured can be obtained by receiving power.Linear magnetostriction effect, which can be used, can use magnetostrictivity magnetostrictivity λ Represent
Δ l is length of material variable quantity under magnetic fields in formula, and l is length of material, and typical magnetostrictivity is with outer magnetic Field intensity variation relation curve such as Fig. 3, it can be seen that as magnetic field intensity increases, magnetostrictivity tends to be full after being continuously increased With.Typical received optical power is as shown in Figure 4 with reflecting surface displacement variation relation curve, it can be seen that when d very littles, reflection The reception fibre core of light field and multi-core fiber does not occur simultaneously, and does not receive luminous power, that is, produces dead band;As distance d increases, receive To luminous power drastically become big with the increase of overlapping region area, this intervals linear degree is preferable, high sensitivity, is applied to Measure micro-displacement caused by material in this sensor-based system;Most light can be received when reflection light field, which is completely covered, receives fibre core Power, receive luminous power and progressively reach maximum therewith;As distance d continues to increase, reflection light field light intensity reduces, and both hand over Folded area is constant, causes the luminous power for being coupled into reception optical fiber to reduce.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included Within protection scope of the present invention.

Claims (10)

  1. A kind of 1. reflection-type intensity modulated multi-core fiber current sensing system, it is characterised in that including:Optical emitting module (1), optical signal modulation module (2), multicore optical fiber coupler (3), multi-core fiber (4), electromagnetic susceptibility composite (5), photoelectricity Detector (6) and electronic signal processing module (7);
    The multicore optical fiber coupler (3) includes N number of single parallel branch, and the multi-core fiber (4) includes N number of fibre core, N >=2;
    The output end of the optical emitting module (1) passes through optical signal modulation module (2) and the n of multicore optical fiber coupler (3) Individual single parallel branch connection, 1≤n < N;
    Other (N-n) individual single parallel branch of the multicore optical fiber coupler (3) by the photodetector (6) with it is described The input of electronic signal processing module (7) is connected;
    One end of the multi-core fiber (4) is connected with one end of the multicore optical fiber coupler (3), multi-core fiber (4) it is another End and the reflecting surface of electromagnetic susceptibility composite (5) keep certain distance, and the electromagnetic susceptibility composite (5) is connected to be measured In power system.
  2. 2. a kind of reflection-type intensity modulated multi-core fiber current sensing system as claimed in claim 1, it is characterised in that described The DC signal that electromagnetic susceptibility composite (5) receives power system to be measured produces fixed displacement, receives power system to be measured AC signal produce the mechanical oscillation of same frequency, electromagnetic susceptibility composite (5) and multi-core fiber end face distance are less than 10mm, Angle is less than 5 °.
  3. 3. a kind of reflection-type intensity modulated multi-core fiber current sensing system as claimed in claim 2, it is characterised in that described At work, optical emitting module (1) produces light beam and is modulated generation signal via optical signal modulation module (2) system Light, n single parallel branch of multicore optical fiber coupler (3) is connected with n fibre core of multi-core fiber (4) and transmission signal light, Flashlight is emitted to electromagnetic susceptibility composite (5) surface in multi-core fiber (4) end face and reflected, multi-core fiber (4) it is another (N-n) individual fibre core receives reflected light outside, and is connected biography with (N-n) in addition individual single parallel branch of multicore optical fiber coupler (3) Defeated reflected light to photodetector (6) carries out opto-electronic conversion, and obtained electric signal is handled through electronic signal processing module (7) and connect Luminous power is received, utilizes position caused by the fixed displacement of received optical power acquisition electromagnetic susceptibility composite (5) or mechanical oscillation Move, the information about power to be measured of power system to be measured is obtained with reference to the magnetostrictive effect of electromagnetic susceptibility composite.
  4. 4. a kind of reflection-type intensity modulated multi-core fiber current sensing system as claimed in claim 3, it is characterised in that described Electronic signal processing module (7) includes:Amplifying circuit, bandpass filter, phase-sensitive detection circuit, low pass filter, analog-digital converter And host computer processing module, amplifying circuit and bandpass filter carry out tentatively amplification and denoising to electric signal, through phase sensitive detection electricity Horizontal lock amplification is entered on road to signal frequency, then after filtering out most of noise by low-pass filter circuit, is converted to by analog-digital converter Data signal is simultaneously handled in host computer processing module, obtains received optical power.
  5. 5. a kind of reflection-type intensity modulated multi-core fiber current sensing system as claimed in claim 4, it is characterised in that described Host computer processing module includes data acquisition circuit, data transmission circuit, data processing module, and data acquisition circuit obtains numeral Signal, transmitted by data transmission circuit and received optical power is obtained into data processing module.
  6. 6. a kind of reflection-type intensity modulated multi-core fiber current sensing system as described in claim 1-5 is any, its feature exist In, the optical emitting module (1) is incoherent light source, including:LED, wideband light source and ASE light sources.
  7. 7. a kind of reflection-type intensity modulated multi-core fiber current sensing system as claimed in claim 6, it is characterised in that described Optical emitting module (1) is LED.
  8. 8. a kind of reflection-type intensity modulated multi-core fiber current sensing system as described in claim 1-5 is any, its feature exist In the optical signal modulation module (2) includes drive circuit and modulation circuit, and drive circuit is used to limit the electric current by light source Output signal light, modulation circuit are used for the stable flashlight of reception signal light output.
  9. 9. a kind of reflection-type intensity modulated multi-core fiber current sensing system as described in claim 1-5 is any, its feature exist In the photodetector (6) is PIN photodiode or APD avalanche diodes.
  10. A kind of 10. reflection-type intensity modulated multi-core fiber current sensing system as claimed in claim 9, it is characterised in that institute It is PIN photodiode to state photodetector (6).
CN201710548882.9A 2017-07-06 2017-07-06 A kind of reflection-type intensity modulated multi-core optical fiber current sensing system Active CN107402320B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710548882.9A CN107402320B (en) 2017-07-06 2017-07-06 A kind of reflection-type intensity modulated multi-core optical fiber current sensing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710548882.9A CN107402320B (en) 2017-07-06 2017-07-06 A kind of reflection-type intensity modulated multi-core optical fiber current sensing system

Publications (2)

Publication Number Publication Date
CN107402320A true CN107402320A (en) 2017-11-28
CN107402320B CN107402320B (en) 2019-05-10

Family

ID=60405369

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710548882.9A Active CN107402320B (en) 2017-07-06 2017-07-06 A kind of reflection-type intensity modulated multi-core optical fiber current sensing system

Country Status (1)

Country Link
CN (1) CN107402320B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112762861A (en) * 2019-11-04 2021-05-07 聊城大学 Multi-core optical fiber sensing assembly and multi-core optical fiber sensing system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618567A (en) * 1992-04-07 1994-01-25 Nissin Electric Co Ltd Optical-fiber current sensor
EP0856753A1 (en) * 1997-01-29 1998-08-05 Lucent Technologies Inc. Magnetostrictively tunable optical fiber gratings
CN2350772Y (en) * 1998-11-26 1999-11-24 西安同维科技发展有限责任公司 Magneto-optical current transformer
CN101710148A (en) * 2009-12-09 2010-05-19 华南师范大学 Current transformer and current detection system
CN101726647A (en) * 2009-12-04 2010-06-09 华中科技大学 Current sensor based on photonic crystal fiber grating
CN201589873U (en) * 2009-05-19 2010-09-22 姚竑杰 Sensing optical fiber for reflective all-fiber current sensor
CN101871959A (en) * 2010-06-08 2010-10-27 电子科技大学 Optical fiber Fabry-perot current sensor and preparation method thereof
CN103776897A (en) * 2014-02-18 2014-05-07 华中科技大学 Magnetic flux leakage testing method and device based on defect magnetic flux leakage region reversed field
CN104198789A (en) * 2014-09-11 2014-12-10 国家电网公司 Optical fiber current transformer based on magnetostrictive effect
CN106093525A (en) * 2016-06-23 2016-11-09 华中科技大学 A kind of current sensor based on microdisplacement measurement

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618567A (en) * 1992-04-07 1994-01-25 Nissin Electric Co Ltd Optical-fiber current sensor
EP0856753A1 (en) * 1997-01-29 1998-08-05 Lucent Technologies Inc. Magnetostrictively tunable optical fiber gratings
CN2350772Y (en) * 1998-11-26 1999-11-24 西安同维科技发展有限责任公司 Magneto-optical current transformer
CN201589873U (en) * 2009-05-19 2010-09-22 姚竑杰 Sensing optical fiber for reflective all-fiber current sensor
CN101726647A (en) * 2009-12-04 2010-06-09 华中科技大学 Current sensor based on photonic crystal fiber grating
CN101710148A (en) * 2009-12-09 2010-05-19 华南师范大学 Current transformer and current detection system
CN101871959A (en) * 2010-06-08 2010-10-27 电子科技大学 Optical fiber Fabry-perot current sensor and preparation method thereof
CN103776897A (en) * 2014-02-18 2014-05-07 华中科技大学 Magnetic flux leakage testing method and device based on defect magnetic flux leakage region reversed field
CN104198789A (en) * 2014-09-11 2014-12-10 国家电网公司 Optical fiber current transformer based on magnetostrictive effect
CN106093525A (en) * 2016-06-23 2016-11-09 华中科技大学 A kind of current sensor based on microdisplacement measurement

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
J. MORA 等: "A Magnetostrictive Sensor Interrogated by Fiber Gratings for DC-Current and Temperature Discrimination", 《IEEE PHOTONICS TECHNOLOGY LETTERS》 *
王衡 等: "基于M-Z干涉仪的全光纤电流传感器", 《传感器与微系统》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112762861A (en) * 2019-11-04 2021-05-07 聊城大学 Multi-core optical fiber sensing assembly and multi-core optical fiber sensing system

Also Published As

Publication number Publication date
CN107402320B (en) 2019-05-10

Similar Documents

Publication Publication Date Title
CN102628884B (en) Closed-loop optical fiber current transformer
CN103777062B (en) Interference ring type all-fiber current transformer
CN103777063B (en) A kind of fibre optic current sensor
CN101509962B (en) Magnetic induction measurement method and apparatus
CN105043526B (en) A kind of vibration sensor based on optical-electronic oscillator
CN105974172A (en) All-fiber current transformer based on polarization maintaining fiber temperature sensor
CN107085130A (en) Using the polarization insensitive electric current and magnetic field sensor of active compensation
CN108760080B (en) A kind of distributed fiber Raman temperature measuring equipment and method based on ASE noise
CN106404154A (en) Optical fiber acoustic wave detection system
CN107402320B (en) A kind of reflection-type intensity modulated multi-core optical fiber current sensing system
CN108957366A (en) D.C. magnetic field sensor-based system based on the tunable characteristic of microbubble chamber mechanical mode
CN102012284B (en) Photoelectronic device for distributed optical fiber temperature sensor
CN106291039B (en) Magneto-opitcal current transducer
CN202330519U (en) Optical current mutual inductor for magneto-optic glass using interference close-loop detection
CN206291958U (en) Optical fiber acoustic detection system
CN108254616A (en) A kind of solenoid type optics small electric current sensor with temperature-compensating
JP5163850B2 (en) Electromagnetic field measuring device
CN106291040B (en) Magneto-opitcal current transducer
CN105222896B (en) Method of using magneto-optic fiber to research propagation characteristic of polarized light in ring-down cavity
CN105866506B (en) A kind of device and method that conductor current is measured using magneto-optic memory technique
CN205786792U (en) A kind of all-fiber current transformator based on optical fiber temperature sensor
CN109861709A (en) Microwave sounding method and microwave receiver based on microwave photon conversion and balanced homodyne detection
CN206496836U (en) A kind of phase sensitive optical time domain reflection system based on the relevant detection of double homologous heterodyne
CN104865547B (en) Integral form pulsed magnetic field measurement system signal injects scaling method
CN109406852A (en) A kind of high current current detection sensor based on all -fiber mutual inductor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant