CN109752580A - A kind of current transformer of closed loop feedback control - Google Patents
A kind of current transformer of closed loop feedback control Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 claims abstract description 80
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- 230000010287 polarization Effects 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 23
- 230000003750 conditioning effect Effects 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims description 4
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
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Abstract
The present invention relates to a kind of current transformers of closed loop feedback control, including all -fiber sensing ring 1, polarization maintaining optical fibre 2 and collector 3, collector 3 includes light source 4, fiber coupler 5, optical fiber polarizer 6, straight waveguide phase modulator 7, polarization maintaining optical fibre ring retard 8, photodetector 12, signal conditioning circuit 13, A/D converter 14, processing module 15 and D/A converter 16, and all -fiber, which senses ring 1, to be included optical-fibre wave plate 9, protect circle sensor fibre 10 and fiber reflector 11.The closed loop feedback ring formed by photodetector 12, signal conditioning circuit 13, A/D converter 14, processing module 15 and D/A converter 16 can carry out feedback control to sensing optical path phase state.Therefore, by component each inside the current transformer be used cooperatively and closed loop feedback control, be able to ascend the detection reliability of optical fiber current mutual inductor, realize high reliability detection.
Description
Technical field
The present invention relates to a kind of current transformers of closed loop feedback control.
Background technique
The characteristics of flexible direct current network system is very different with AC system, and failure has its own, be mainly reflected in
Under several aspects: 1) fault current rises rapid；2) coverage is wide；3) fault location is difficult；4) direct current interruption equipment and technology
Difficulty is high；5) a variety of power electronics unit reciprocal effects.Flexible direct current system is needed using high-speed figure measuring technique, for surveying
The response time of amount system, dynamic range, required precision are very high, and novel is suitable for high pressure, the high speed of large capacity flexible direct current
Measurement key technology and equipment are urgently studied.
It is right with dc circuit breaker high speed motion in flexible transmission system and converter valve control unit protection quick acting demand
The sample rate of all-fiber current transformator and response time propose requirements at the higher level, therefore study a kind of the quick of closed loop feedback control
Response all-fiber current transformator is most important, and still, the detection reliability of existing this kind of current transformer is not high, can not
Realize high reliability detection.
Summary of the invention
The object of the present invention is to provide a kind of current transformers of closed loop feedback control, to solve existing fibre-optic current
Mutual inductor detects the not high problem of reliability.
To achieve the above object, the solution of the present invention includes a kind of current transformer of closed loop feedback control, including full light
Fibre sensing ring (1), polarization maintaining optical fibre (2) and collector (3), the collector (3) include light source (4), fiber coupler (5), light
The fine polarizer (6), straight waveguide phase modulator (7), polarization maintaining optical fibre ring retard (8), photodetector (12), signal conditioning circuit
(13), A/D converter (14), processing module (15) and D/A converter (16), all -fiber sensing ring (1) includes optical fiber wave
Piece (9) protects circle sensor fibre (10) and fiber reflector (11)；Light source (4) connects the optical signal input of fiber coupler (5)
The optical signal input/output terminal at end, the fiber coupler (5) connects the optical fiber polarizer (6), the optical fiber polarizer
(6), straight waveguide phase modulator (7), polarization maintaining optical fibre ring retard (8), polarization maintaining optical fibre (2), optical-fibre wave plate (9), guarantor's circle sense light
Fine (10) and fiber reflector (11) are sequentially connected along optical path, wherein optical fiber polarizer (6) and straight waveguide phase modulator (7)
45 ° are carried out to be connected by shaft；The light signal output end output of fiber coupler (5) connects the photodetector (12), the light
The input terminal of the output end connection signal conditioning circuit (13) of electric explorer (12), the signal conditioning circuit (13), A/D conversion
Device (14), processing module (15) and D/A converter (16) are sequentially connected electrically, the modulated signal output of the D/A converter (16)
End output connects the straight waveguide phase modulator (7).
Current transformer provided by the invention has the function of closed loop feedback control, and the original optical signal that light source issues passes through light
Become linearly polarized light after fine coupler and optical fiber polarizer, linearly polarized light successively passes through straight waveguide phase modulator, polarization maintaining optical fibre
Enter all -fiber after ring retard and polarization maintaining optical fibre and sense ring, is transformed to circularly polarized light through optical-fibre wave plate and enters guarantor's circle sensor fibre sense
Primary current is answered, is influenced again by primary current magnetic field after being reflected by fiber reflector along backtracking, by optical-fibre wave plate
Inverse transformation effect becomes carrying the modulated optical signal of primary current information, and the dry of light occurs at optical fiber polarizer along backtracking
It relating to, interference light signal is transformed to analog voltage signal after entering photodetector after the light splitting of fiber coupler effect, by
Circuit conduct to signal conditioning circuit is handled, and is converted to digital data transmission to processing module via A/D converter, is passed through
It is exported all the way after processing, another way, which is sent to D/A converter and becomes analog signal, to be sent to straight waveguide phase modulator, is being simulated
Feedback control is carried out to sensing optical path phase state under the action of signal, forms system in zero phase state, by SERVO CONTROL
Closed loop operation.Therefore, by component each inside the current transformer be used cooperatively and closed loop feedback control, be able to ascend
The detection reliability of optical fiber current mutual inductor realizes high reliability detection.
The processing module (15) is FPGA.
The straight waveguide phase modulator (7) is lithium niobate optical phase-modulator.
Between the light source (4) and fiber coupler (5), between the fiber coupler (5) and photodetector (12),
Between the fiber coupler (5) and optical fiber polarizer (6), the straight waveguide phase modulator (7) and polarization maintaining optical fibre ring retard
(8) between, between the polarization maintaining optical fibre ring retard (8) and optical-fibre wave plate (9), the optical-fibre wave plate (9) and protect circle sensor fibre
(10) 0 ° is carried out between and between guarantor circle sensor fibre (10) and fiber reflector (11) to be connected by shaft.
The interference of light, interference light signal warp occurs at optical fiber polarizer (6) by the reflected light of fiber reflector (11)
Photodetector is transformed to analog voltage signal after (12), is filtered amplification by circuit conduct to signal conditioning circuit (13),
Processing module (15) are transmitted to after being converted to digital signal via A/D converter (14), demodulate output direct ratio through digital differential
In the digital quantity signal of primary current size, digital quantity signal is exported to relevant valve control protective device, while digital quantity signal
Digit phase staircase waveform is generated through processing module (15) and is sent to D/A converter (16), is sent after becoming analog signal to straight wave guide
Phase-modulator (7), straight waveguide phase modulator (7) feed back sensing optical path phase state under the action of analog signal
Control.
Detailed description of the invention
Fig. 1 is optical fiber current mutual inductor overall structure block diagram；
Fig. 2 is optical fiber current mutual inductor structural schematic diagram；
Fig. 3 is the control principle drawing of closed loop feedback control.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
Optical fiber current mutual inductor provided in this embodiment has the function of closed loop feedback control.As shown in Figure 1, including all -fiber
Sense ring 1,3 three parts of polarization maintaining optical fibre 2 and collector.All -fiber senses the progress of disease that ring 1 mainly completes primary current, and output is inclined
Shake information light, is transmitted to collector 3 via polarization maintaining optical fibre 2 and carries out signal processing, output is proportional to the number of primary current size
Modulated signal and feedback control signal are generated while amount, and high-speed closed loop feedback control is carried out to all -fiber sensor-based system.
As shown in Fig. 2, collector 3 include light source 4, fiber coupler 5, optical fiber polarizer 6, straight waveguide phase modulator 7,
Polarization maintaining optical fibre ring retard 8, photodetector 12, signal conditioning circuit 13, A/D converter 14, processing module 15 and D/A converter
16, all -fiber, which senses ring 1, to be included optical-fibre wave plate 9, protects circle sensor fibre 10 and fiber reflector 11.
Wherein, light source 4 uses high power SLD light source.
Straight waveguide phase modulator 7 uses lithium niobate optical phase-modulator.
A/D converter 14 uses the high-performance A/D converter of 100MHz sample rate, to the high fidelity simulation signal after conditioning
It is digitized and exports large capacity high frequency sampled data and carry out subsequent processing to processing module 15, improve A/D sample rate and position
Number makes each optical path sampling period have enough sampling numbers, improves the signal-to-noise ratio that optical path directly adopts data, reduces secondary adopt
Sample data processing time improves system response time and frequency response precision.
Processing module 15 is by taking FPGA as an example, using high-performance FPGA as data processing core unit, when on the one hand passing through
Sequence control improves the working performance and Upon Cooperative Efficiency of all logical devices, and on the other hand its fast data processing capability is that high speed is adopted
Sample and data transmission provide reliable hardware support.
All-fiber current transformator mainly passes through the welding of optical device tail optical fiber and circuit connection completes assembly.As shown in Fig. 2, light
The tail optical fiber of source 4 and photodetector 12 respectively with two fiber port weldings of fiber coupler 5, wherein according to the function of port
For energy, the optical signal input welding of light source 4 and fiber coupler 5, specially 0 ° to axis welding, the light of fiber coupler 5
Signal output end output connection photodetector 12, specially 0 ° to axis welding.Other a ports and light of fiber coupler 5
The input end fiber welding of the fine polarizer 6, specially 0 ° to axis welding, for function, which is fiber coupler 5
Optical signal input/output terminal.The output end optical fiber of optical fiber polarizer 6 and the input end fiber of straight waveguide phase modulator 7 carry out
45 ° carry out 0 ° to axis welding, the output end optical fiber of straight waveguide phase modulator 7 and the input end fiber of polarization maintaining optical fibre ring retard 8
To axis welding, 0 ° of the output end optical fiber of polarization maintaining optical fibre ring retard 8 and one end of polarization maintaining optical fibre 2 and progress are to axis welding, polarization-maintaining light
For 0 ° of the input end fiber of the other end of fibre 2 and optical-fibre wave plate 9 to axis welding, optical-fibre wave plate 9 protects circle sensor fibre 10 and optical fiber is anti-
Mirror 11 is penetrated successively to be welded together axis for 0 °.It protects circle sensor fibre 10 and acts on current-carrying Primary Conductor 17.Among the above, optical fiber is polarized
Device 6, straight waveguide phase modulator 7, polarization maintaining optical fibre ring retard 8 and optical-fibre wave plate 9 are divided into input terminal and output end, still, by
There are two directions for optical signal in optical fiber, so, it is above-mentioned to be described merely for convenience of description with input terminal and output end,
Substantially, there is no points of stringent input terminal and output end for these components.
The output pin of photodetector 12 is connect by circuit with the input terminal of signal conditioning circuit 13, by return light
Signal is converted to electric signal and is sent into signal conditioning circuit 13, and signal conditioning circuit 13, A/D converter 14, FPGA15 and D/A turn
Parallel operation 16 is sequentially connected, together by circuit integration.The modulated signal output end output connection straight wave guide phase of D/A converter 16
Position modulator 7.
It senses optical path and uses the linear type reflecting light line structure based on lithium niobate optical phase-modulator, light source 4 issues
Optical signal and return optical signal share optical path.The low polarised light for selecting the optical fiber polarizer 6 of High Extinction Ratio to issue light source 4 becomes
It is changed to the linearly polarized light of high-polarization, straight waveguide phase modulator 7 is selected to receive the modulated signal from D/A converter 16, it is right
Optical path carries out feedback control, makes system work in closed loop high sensitivity state.Select power light source 4 and close to 1:1 splitting ratio
Fiber coupler 5 improve optic path signal-to-noise ratio, select the oval polarization maintaining optical fibre production optical-fibre wave plate 9 to improve all -fiber
The temperature characterisitic of current transformer.All -fiber senses the progress of disease of the realization of ring 1 to a high current, passes through polarization maintaining optical fibre 2 and transmits light
It when signal returns to fiber coupler 5, acts on through light splitting and being received by photodetector 12, select high speed PIN-FET photodetector
PIN-FET bandwidth is increased to 20M by 4M, guarantees the high-fidelity photoelectric signal transformation during the primary current progress of disease by component.
The original optical signal that light source 4 issues becomes linearly polarized light after fiber coupler 5 and optical fiber polarizer 6, and line is inclined
The light that shakes successively enters all -fiber after straight waveguide phase modulator 7, polarization maintaining optical fibre ring retard 8, polarization maintaining optical fibre 2 and senses ring 1, warp
Optical-fibre wave plate 9 enters the induction primary current of sensor fibre 10 after being transformed to circularly polarized light, along original after being reflected by fiber reflector 11
Road returns to be influenced by primary current magnetic field again, becomes carrying primary current information by the inverse transformation effect of optical-fibre wave plate 9
Modulated optical signal, along backtracking by after polarization maintaining optical fibre 2, polarization maintaining optical fibre ring retard 8 and straight waveguide phase modulator 7 in optical fiber
The interference of light occurs at the polarizer 6, interference light signal becomes after the light splitting of fiber coupler 5 effect enters photodetector 12
It is changed to analog voltage signal, amplification is filtered by circuit conduct to signal conditioning circuit 13, is converted via 100M sample rate A/D
Device 14 is converted to digital data transmission to high-performance FPGA15, and the original of primary current size is proportional to through digital differential demodulation output
Beginning high-frequency digital amount, high-frequency digital amount by downward resampling and filtering output 100kHz digital information to valve control protective device,
Digital differential demodulation, the downward resampling of filter that the high frequency sampled data exported through A/D converter 14 passes through FPGA15
Realize 100kHz high-speed sampling and data output.Digit phase staircase waveform, which is generated, through FPGA15 simultaneously is sent to D/A converter 16
Become analog signal, finally send to straight waveguide phase modulator 7, straight waveguide phase modulator 7 is right under the action of analog signal
It senses optical path phase state and carries out feedback control, system is made, in zero phase state, to form Closed loop operation by SERVO CONTROL.Closed loop is anti-
The control principle for presenting control is as shown in Figure 3.It regard FPGA15 and D/A converter 16 as feedback loop, passes through design of feedback coefficient
And control algolithm, the speed and precision of feedback control are improved, makes system all-the-time stable in highly sensitive working condition, forms closed loop
Control, ensure that the high-precision current progress of disease of the all-fiber current transformator under complex environment.
Collector 3 selects high-speed a/d converter 14, and sample rate is increased to 100M by 10M, increases sampling number, more
The variation of fast capture optical path return signal.In order to shorten 16 settling time of D/A converter, the D/A that settling time is shorter is selected
Converter reduces the delay of closed loop feedback signal function, improves closed loop feedback control speed.Select performance stronger, resource
More high-performance FPGA15 shorten the closed loop feedback period of whole system by the method for space for time, improve and are
The closed loop feedback speed of system, shortens signal processing time.Analog Circuit Design is optimized, reasonable Component selection, electricity are passed through
Road design, placement-and-routing reduce the noise of analog circuit, on this basis, increase the forward gain in analog signal circuit.It improves
The digital gain of feedback channel in closed loop feedback algorithm optimizes digital filter design, reduces the filter delay time.
Therefore, it is based on digital square-wave modulation technique, phase-modulation is carried out to system using straight waveguide phase modulator 7, is changed
Change system operating point reduces original highband signal and demodulates difficulty, improves systematic survey sensitivity, and output meets the number of standard requirements
Word signal is supplied to valve control protective device.In addition, straight waveguide phase modulator 7 is integrated in collector 3, modulating and demodulating signal
It is all completed in collector 3, modular cable is not necessarily between first and second, improves mutual inductor anti-interference ability.
Quick response all-fiber current transformator provided by the invention is anti-based on high-speed data acquisition transmission technology and quickly
Present control system, the variation of quick response primary current has that strong antijamming capability, measurement accuracy are high, dynamic range is big, frequency is loud
The advantages that answering wide range, high reliablity, small step response delay, meets New Generation of Intelligent substation to the need of high-speed measuring device
It asks.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in introduction according to the present invention
The model of shape, formula, parameter do not need to spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment carries out are still fallen in protection scope of the present invention.
Claims (5)
1. a kind of current transformer of closed loop feedback control, which is characterized in that sense ring (1), polarization maintaining optical fibre (2) including all -fiber
With collector (3), the collector (3) includes light source (4), fiber coupler (5), optical fiber polarizer (6), straight wave guide phase tune
Device (7) processed, polarization maintaining optical fibre ring retard (8), photodetector (12), signal conditioning circuit (13), A/D converter (14), processing
Module (15) and D/A converter (16), all -fiber sensing ring (1) include optical-fibre wave plate (9), protect circle sensor fibre (10) and
Fiber reflector (11)；Light source (4) connects the optical signal input of fiber coupler (5), the light letter of the fiber coupler (5)
Number input/output terminal connects the optical fiber polarizer (6), the optical fiber polarizer (6), straight waveguide phase modulator (7), polarization-maintaining
Optical fibre delay loop (8), optical-fibre wave plate (9), protects circle sensor fibre (10) and fiber reflector (11) along optical path at polarization maintaining optical fibre (2)
It is sequentially connected, wherein optical fiber polarizer (6) and straight waveguide phase modulator (7) carry out 45 ° and be connected by shaft；Fiber coupler (5)
Light signal output end output connect the photodetector (12), the output end connection signal tune of the photodetector (12)
Manage the input terminal of circuit (13), the signal conditioning circuit (13), A/D converter (14), processing module (15) and D/A converter
(16) it is sequentially connected electrically, the modulated signal output end output of the D/A converter (16) connects the straight waveguide phase modulator
(7)。
2. the current transformer of closed loop feedback control according to claim 1, which is characterized in that the processing module (15)
For FPGA.
3. the current transformer of closed loop feedback control according to claim 1, which is characterized in that the straight wave guide phase tune
Device (7) processed is lithium niobate optical phase-modulator.
4. the current transformer of closed loop feedback control according to claim 1, which is characterized in that the light source (4) and light
Between fine coupler (5), between the fiber coupler (5) and photodetector (12), the fiber coupler (5) and optical fiber
Between the polarizer (6), between the straight waveguide phase modulator (7) and polarization maintaining optical fibre ring retard (8), the polarization maintaining optical fibre delay
Between ring (8) and optical-fibre wave plate (9), the optical-fibre wave plate (9) and protect circle sensor fibre (10) between and guarantors circle sense
0 ° is carried out between optical fiber (10) and fiber reflector (11) to be connected by shaft.
5. the current transformer of closed loop feedback control according to any one of claims 1-4, which is characterized in that pass through light
The interference of light occurs at optical fiber polarizer (6) for the reflected light of fine reflecting mirror (11), and interference light signal is through photodetector (12)
After be transformed to analog voltage signal, amplification is filtered by circuit conduct to signal conditioning circuit (13), via A/D converter
(14) it is converted to digital signal and is transmitted to processing module (15) later, be proportional to primary current size through digital differential demodulation output
Digital quantity signal, digital quantity signal is exported to relevant valve control protective device, while digital quantity signal is through processing module (15)
It generates digit phase staircase waveform and is sent to D/A converter (16), send after becoming analog signal to straight waveguide phase modulator (7),
Straight waveguide phase modulator (7) carries out feedback control to sensing optical path phase state under the action of analog signal.
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| CN201711086983.5A CN109752580A (en) | 2017-11-07 | 2017-11-07 | A kind of current transformer of closed loop feedback control |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927431A (en) * | 2019-12-12 | 2020-03-27 | 东南大学 | Closed-loop demodulation all-fiber current transformer and large-current waveform hopping problem solving method thereof |
| CN111398651A (en) * | 2020-04-15 | 2020-07-10 | 哈尔滨理工大学 | All-fiber current transformer sensing device capable of actively compensating temperature and temperature compensation method |
| CN115372880A (en) * | 2022-08-23 | 2022-11-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Light path testing system and fault point detection method of reflective all-fiber current transformer |
| CN117310260A (en) * | 2023-11-28 | 2023-12-29 | 华中科技大学 | Phase gradient correction and light path difference wide-amplitude current measurement system and method |
| CN117405961A (en) * | 2023-12-15 | 2024-01-16 | 华中科技大学 | Optical path micro-differential range equivalent and feedback self-compensating optical fiber current measurement system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721847A (en) * | 2012-06-15 | 2012-10-10 | 天津光拓科技有限公司 | Hybrid grating on-line temperature measurement type all-fiber current transformer and current detection method thereof |
| CN106443551A (en) * | 2016-10-12 | 2017-02-22 | 长飞光纤光缆股份有限公司 | Full-optical fiber current transformer monitoring system |
| CN106546793A (en) * | 2016-11-01 | 2017-03-29 | 长园深瑞继保自动化有限公司 | Three-phase integratedization all-fiber current transformator |
| CN106771547A (en) * | 2017-04-07 | 2017-05-31 | 华北电力大学 | A kind of design of the all-fiber current transformator signal supervisory instrument based on DSP |
| CN207396586U (en) * | 2017-11-07 | 2018-05-22 | 许继集团有限公司 | A kind of optical fiber current mutual inductor |
-
2017
- 2017-11-07 CN CN201711086983.5A patent/CN109752580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721847A (en) * | 2012-06-15 | 2012-10-10 | 天津光拓科技有限公司 | Hybrid grating on-line temperature measurement type all-fiber current transformer and current detection method thereof |
| CN106443551A (en) * | 2016-10-12 | 2017-02-22 | 长飞光纤光缆股份有限公司 | Full-optical fiber current transformer monitoring system |
| CN106546793A (en) * | 2016-11-01 | 2017-03-29 | 长园深瑞继保自动化有限公司 | Three-phase integratedization all-fiber current transformator |
| CN106771547A (en) * | 2017-04-07 | 2017-05-31 | 华北电力大学 | A kind of design of the all-fiber current transformator signal supervisory instrument based on DSP |
| CN207396586U (en) * | 2017-11-07 | 2018-05-22 | 许继集团有限公司 | A kind of optical fiber current mutual inductor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927431A (en) * | 2019-12-12 | 2020-03-27 | 东南大学 | Closed-loop demodulation all-fiber current transformer and large-current waveform hopping problem solving method thereof |
| CN111398651A (en) * | 2020-04-15 | 2020-07-10 | 哈尔滨理工大学 | All-fiber current transformer sensing device capable of actively compensating temperature and temperature compensation method |
| CN111398651B (en) * | 2020-04-15 | 2022-02-11 | 哈尔滨理工大学 | All-fiber current transformer sensing device capable of actively compensating temperature and temperature compensation method |
| CN115372880A (en) * | 2022-08-23 | 2022-11-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Light path testing system and fault point detection method of reflective all-fiber current transformer |
| CN117310260A (en) * | 2023-11-28 | 2023-12-29 | 华中科技大学 | Phase gradient correction and light path difference wide-amplitude current measurement system and method |
| CN117310260B (en) * | 2023-11-28 | 2024-02-20 | 华中科技大学 | Phase gradient correction and light path difference wide-amplitude current measurement system and method |
| CN117405961A (en) * | 2023-12-15 | 2024-01-16 | 华中科技大学 | Optical path micro-differential range equivalent and feedback self-compensating optical fiber current measurement system |
| CN117405961B (en) * | 2023-12-15 | 2024-03-15 | 华中科技大学 | Optical path micro-differential range equivalent and feedback self-compensating optical fiber current measurement system |
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