CN109696577A - A kind of fibre optic current sensor and its measurement method of integrated temperature monitoring - Google Patents
A kind of fibre optic current sensor and its measurement method of integrated temperature monitoring Download PDFInfo
- Publication number
- CN109696577A CN109696577A CN201910001721.7A CN201910001721A CN109696577A CN 109696577 A CN109696577 A CN 109696577A CN 201910001721 A CN201910001721 A CN 201910001721A CN 109696577 A CN109696577 A CN 109696577A
- Authority
- CN
- China
- Prior art keywords
- temperature
- current
- module
- current sensor
- fiber
- 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.)
- Pending
Links
Classifications
-
- 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
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses the fibre optic current sensor and its measurement method of a kind of monitoring of integrated temperature, device includes light source module, fiber-optic current sensor module, optical fiber sensing module and signal processing module, and the light source module provides testing light source；The fiber-optic current sensor module and optical fiber sensing module acquire respectively and handle the current information and temperature information of conducting wire to be measured, and are transmitted to signal processing module；The signal processing module includes current signal processing submodule and processes temperature signal submodule, current in wire information and operational temperature information to be measured are received and processed respectively, current signal handles the synchronous reception operational temperature information of submodule, exports accurate current value after compensating calculating to electric current initial value.For measurement method provided by the invention based entirely on above-mentioned apparatus, fibre optic current sensor measurement accuracy and poor reliability caused by solving the problems, such as ignoring temperature fluctuation can be simultaneously reached saving cost of manufacture, the purpose of fault alarm.
Description
Technical field
The present invention relates to fibre optic current sensor technical fields, and in particular to a kind of fibre-optic current biography of integrated temperature monitoring
Sensor and its measurement method.
Background technique
In the power system, it needs to measure the parameters such as electric current, temperature, since traditional electromagnetic sensor is vulnerable to electromagnetic field
Interference, can not be used in this kind of occasion, and fibre optical sensor generally has that small in size, light-weight, reelability is good, insulating properties
Well, the advantages that anti-electromagnetic interference capability is strong, also there is good effect under the environment such as high pressure, high temperature, burn into electrical noise,
So favor of the fibre optical sensor by power industry.
Fibre optic current sensor is a kind of current sensor sensed using optical fiber as sensing element.Its work is former
Reason is wrapped in sensor fibre on conducting wire to be measured, and according to Faraday magnetooptical effect, the magnetic field that electric current generates in conducting wire will make light
Fibre is to the left-handed refractive index difference with right-handed polarized light, by generating phase difference after sensor fibre, to realize the survey to electric current
Amount.
In " the In-Line Sagnac Interferometer Current that J.Blake professor in 1996 et al. delivers
Sensor " in a text, describe a kind of reflective Sagnac interference-type current sense for developing out from Sagnac ring structure
Device.This fibre optic current sensor is insensitive to vibrating and rotating, while eliminating most of because temperature change and optical fiber are additional
Linear birefrigence bring phase error, simplifies the structure of system, improves the accuracy of system, makes fibre optic current sensor
It is provided with stronger practicability.But in actual application, fibre circuit is arranged in outdoor, the fluctuating in the four seasons, diurnal temperature
There can be a degree of influence to the temperature characterisitic of sensor coil part.In existing optical fiber preparation process and installation operation item
Under part, originally birefringent containing additional line in optical fiber, when the temperature is changed, the linear birefrigence in optical fiber can become therewith again
Change, so that the originally small difficult faraday's phase shift surveyed can become more to be difficult to accurately measure because of the variation of temperature.
Summary of the invention
Goal of the invention: the fibre optic current sensor and its measurement method monitored the present invention provides a kind of integrated temperature,
It is integrated with temperature monitoring module on the basis of fibre optic current sensor, and uses the light source of fibre optic current sensor itself and portion
Path-splitting can detect the operating temperature of optical fiber simultaneously, to make compensation to later data processing, obtain more accurate
Current value solves in the prior art due to ignoring fibre optic current sensor measurement accuracy caused by fiber optic temperature fluctuates and reliable
Property difference problem.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of fibre optic current sensor of integrated temperature monitoring, it is characterised in that: mainly include light source module, fibre-optic current
Sensing module, optical fiber sensing module and signal processing module；
The light source module and fiber-optic current sensor module light connects provide light source, the fibre optic current sensor measurement
Current in wire information to be measured, and current information is sent to signal processing module；
The optical fiber sensing module is integrated on fiber-optic current sensor module, and with fiber-optic current sensor module
Common light source module is sent to signal processing module for acquiring fiber work temperature information, while by temperature information；
The signal processing module includes current signal processing submodule and processes temperature signal submodule, the electric current letter
Number processing submodule connect fiber-optic current sensor module, receive and process current in wire information to be measured, obtain current in wire to be measured
Initial value, processes temperature signal submodule connect optical fiber sensing module, receive and process operational temperature information, obtain work temperature
Angle value, output temperature monitoring result；The current signal processing submodule is synchronous to receive what processes temperature signal submodule exported
Operating temperature value exports accurate current value after compensating operation to current in wire initial value to be measured.
Its object is to: by light source module, the collaboration work of fiber-optic current sensor module and optical fiber sensing module
Make, obtain the current information and temperature information of conducting wire to be measured, calculation process, temperature-compensating and defeated are realized in signal processing module
Out, guarantee the high-precision of output current value.
Preferably, the light source module uses wideband light source.
Preferably, the fiber-optic current sensor module uses reflective Sagnac interference-type current sensor.
Preferably, the optical fiber sensing module uses fiber grating temperature sensor, is integrated in the fibre-optic current
On sensor, and common light source module.
The present invention also provides it is a kind of using above-mentioned integrated temperature monitoring fibre optic current sensor measurement electric current method,
It is characterized in that mainly comprising the steps that
1) fiber-optic current sensor module acquires current in wire information to be measured, optical fiber sensing module collecting work temperature letter
Breath；
2) current signal processing submodule receives and processes current in wire information to be measured, obtains electric current initial value, temperature signal
Processing submodule receives and processes operational temperature information, obtains simultaneously output services temperature value；
3) current signal processing submodule is synchronous receives operating temperature value, exports essence after compensating calculating to electric current initial value
True current value.
Preferably, processes temperature signal submodule obtains the function expression that operating temperature value uses in the step 2)
Are as follows:
ΔλB=CTΔT (3)
In formula (3), Δ λBFor fiber bragg grating center wavelength changing value, CTFor temperature coefficient, Δ T is temperature change value.
Preferably, current signal processing submodule obtains the function expression that electric current initial value uses in step 2) are as follows:
Wherein, I is electric current initial value in conducting wire to be measured,For faraday's phase shift, V is Verdet constant, and N is sensor fibre
The number of turns of coil.
Preferably, current signal handles the expression formula that submodule compensates calculating to electric current initial value in step 3) are as follows:
1/V Δ V/ Δ T=0.7 × 10-4/℃ (3)
Wherein, V is the Verdet constant under room temperature state, and Δ V is Verdet constant variable quantity, and Δ T is temperature variation.
The utility model has the advantages that a kind of fibre optic current sensor of integrated temperature monitoring provided by the invention, while to electric current and temperature
Degree measures, and the temperature level measured again compensates galvanometer, solves in the prior art due to ignoring optical fiber temperature
The problem of fibre optic current sensor measurement accuracy caused by degree fluctuates and poor reliability；Integrated temperature monitoring modular is using simultaneously
Some fibre optic current sensor power supplys and part optical path, important light source die is saved compared to individual temperature sensing module
Block effectively reduces cost of manufacture；In addition, the fibre optic current sensor of integrated temperature monitoring can also be used in fault alarm, work as light
When temperature is due to fire or the raising of other failure causes near fine head, sensor also can be monitored identification to this and issue failure
Alarm notifies administrator to repair, and can reduce loss to the greatest extent.Present invention simultaneously provides it is a kind of using above-mentioned integrated temperature supervise
The method and above-mentioned fibre optic current sensor technical effect having the same of the fibre optic current sensor measurement electric current of survey, herein not
It repeats again.
Detailed description of the invention
Fig. 1 is the modular structure schematic diagram of the fibre optic current sensor of integrated temperature monitoring.
Fig. 2 is signal processing module structural schematic diagram.
Fig. 3 is fiber-optic current sensor module light path schematic diagram.
Fig. 4 a is reflective fiber grating schematic diagram.
Fig. 4 b is transmission-type fiber grating schematic diagram.
Fig. 5 a is that mirror portion transmission mode (series system) is integrated and connected schematic diagram.
Fig. 5 b is to be directly connected to light source mode (parallel way) to be integrated and connected schematic diagram.
Attached drawing mark explanation:
1- wideband light source；2- coupler；The 3- polarizer；4-45 ° of fusion point；5- phase-modulator；6- polarization maintaining optical fibre；7- mould
Formula converter；8- sensing fiber coil；9- reflecting mirror；10- ampere wires；11- signal generator；12- optical fiber circulator；13-
Fiber grating；14- optoisolator.
Specific embodiment
Embodiments of the present invention are further explained with reference to the accompanying drawing.
Fig. 1 is the modular structure schematic diagram of the fibre optic current sensor of integrated temperature of the present invention monitoring.The present invention mainly wraps
Include light source module, fiber-optic current sensor module, temperature sensing module and signal processing module.Wherein, fiber-optic current sensor mould
Block is mainly the light path part of current measurement, and optical fiber sensing module is mainly the light path part of temperature detection, signal processing
Module is the signal for receiving and handling current sense module and temperature sensing module, is exported after carrying out analytical calculation to data
Final electric current and temperature results.
Fig. 2 is signal processing module structural schematic diagram of the invention.Signal processing module is divided into current signal processing submodule
Block and processes temperature signal submodule receive and handle respectively the letter of fiber-optic current sensor module and optical fiber sensing module
Number.After the optical signal of fiber-optic current sensor module enters current signal processing submodule, primary current is obtained by preliminary treatment
Data；The optical signal of optical fiber sensing module obtains temperature value, output temperature monitoring after entering processes temperature signal submodule
As a result and be sent into current signal processing submodule, current signal handle submodule to raw current data compensate processing after it is defeated
Accurate current value out.
Fig. 3 is fiber-optic current sensor module light path schematic diagram, uses reflective Sagnac interference-type in the embodiment of the present invention
Current sensor, the wide spectrum optical that wideband light source 1 issues, using the polarizer 3, become linearly polarized light after coupler 2；The line
Polarised light resolves into the mutually orthogonal linearly polarized light in two beam polarization directions through entering polarization maintaining optical fibre 6 after 45 ° of fusion points 4 of optical fiber；
Forward direction modulating action of the two bunch polarised lights by phase-modulator 5 introduces modulation difference；Signal generator 11 generate it is sinusoidal or
Square-wave signal drives phase-modulator 5；Two bunch polarised lights are changed into left circularly polarized light after mode converter 7 respectively
And right-circularly polarized light；When this two beams circularly polarized light passes through sensing fiber coil 8, due to Faraday effect, two beam circular polarization
Faraday's phase difference will be generated between light；This two beams circularly polarized light is transmitted to sensor fibre end, due to the work of end reflector 9
With the polarization state of this two-beam will be flipped, and former left-hand polarization light becomes right-handed polarized light and right-handed polarized light is changed into a left side
Rotatory polarization light；Two beam circularly polarized lights are returned by original optical path, again pass by sensing fiber coil 8, faraday's effect between two-beam
Phase difference is answered to double；When again passing by mode converter 7, circularly polarized light is converted into the linearly polarized light of two beam orthogonal modes, and
The linear polarization of the light polarization and input light that export polarization maintaining optical fibre is exchanged；Polarization light output is by phase-modulator 5
Backward phase-modulation, produce non-to easy difference；The two beam polarised lights for finally carrying faraday's difference and modulation difference exist
It is interfered at the polarizer 3, interference light eventually enters into detector.
Wherein, the parameter of the signal generator of current signal processing submodule feedback regulation fiber-optic current sensor module, makes
The modulation of phase-modulator is in a suitable range always.
Preferably, the type of fiber coupler is 2 × 2 50:50 single-mode optical-fibre couplers.
Preferably, wherein the polarization maintaining optical fibre is oval core polarization maintaining optical fibre or panda type polarization-preserving fiber.
Faraday's phase shift caused by electric currentWherein V is Verdet constant, and N is the circle of sensing fiber coil
Number, I is the size of electric current in conducting wire to be measured.When solving electric current I according to above formula, faraday's phase shift can pass through phase-modulation and letter
Number demodulation measures, so the precision for wanting to further increase electric current has to keep V more accurate.In sensor fibre, temperature hair
When changing, the variation of Verdet constant is directly proportional to temperature change, relationship are as follows: 1/V Δ V/ Δ T=0.7 × 10-4/ DEG C,
Wherein V is the Verdet constant under the conditions of certain temperature, and generally taking room temperature condition is benchmark temperature condition, and Δ V is Verdet normal
Number variable quantity, Δ T is temperature variation.After processes temperature signal submodule measures the temperature of sensing fiber coil, according to room
The difference of Verdet constant size and real time temperature and room temperature when warm, further according to the relationship of Verdet constant and temperature
Verdet constant after finding out variation, and it is modified, thus finally obtained current value can be allowed more accurate.
Optical fiber sensing module in the present invention uses fiber grating temperature sensor, provides two kinds of optical fiber in embodiment
The technical effect of temperature measurement can be achieved in the connection type of grating, and fiber grating temperature sensor is using in fiber grating
The long temperature change relationship of cardiac wave: Δ λB=CTΔ T, wherein CTFor temperature coefficient, it is simple, high sensitivity that structure may be implemented
Temperature measurement, meets thermometry requirements accurate under the high electromagnetic environment of power industry.Specifically respectively as shown in figures 4 a and 4b:
Fig. 4 a is reflective fiber grating schematic diagram, and broad band light beam enters from 1 port of optical fiber circulator 12, then from 2 ends
Mouth outgoing passes through fiber grating 13；And the reflected light that the information such as temperature are carried at fiber grating 13 enters 2 ports, finally from
The outgoing of 3 ports enters processes temperature signal submodule, measures temperature level.Wherein, the reflected light wavelength at fiber grating 13
It must fall in the spectral region of wideband light source 1.
Fig. 4 b is transmission-type fiber grating schematic diagram.Broad band light beam is directly entered fiber grating after optoisolator 14
13, transmitted spectrum enters processes temperature signal submodule, finally measures temperature level.Wherein, saturating at fiber grating 13
Penetrating spectral wavelength must fall in the spectral region of wideband light source 1.
The embodiment of the present invention provides the mode that is integrated and connected of two kinds of fiber-optic current sensor modules and optical fiber sensing module:
It mirror portion transmission mode (series system) and is directly connected to light source mode (parallel way), can reach the skill being integrated and connected
Art effect, respectively as shown in figure 5 a and 5b:
Fig. 5 a is that mirror portion transmission mode (series system) is integrated and connected schematic diagram.Optical fiber sensing module is integrated
In fiber-optic current sensor module after reflecting mirror 9, from fiber-optic current sensor module reflecting mirror 9 transmit a small amount of light beam directly into
Enter to be looped around the optical fiber sensing module around ampere wires 10, for measuring the operating temperature of optical fiber head.
Fig. 5 b is to be directly connected to light source mode (parallel way) to be integrated and connected schematic diagram.Optical fiber sensing module is integrated in
The output end of coupler 2, broad band light beam are emitted from 2 output end of coupler, are looped around ampere wires by the importing of one section long optical fiber
Optical fiber sensing module around 10.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this hair
Bright protection scope.
Claims (8)
1. a kind of fibre optic current sensor of integrated temperature monitoring, it is characterised in that: including light source module, fiber-optic current sensor mould
Block, optical fiber sensing module and signal processing module；
The light source module and fiber-optic current sensor module light connects, provide light source, and the fibre optic current sensor measurement is to be measured
Current in wire information, and current information is sent to signal processing module；
The optical fiber sensing module is integrated on fiber-optic current sensor module, and is shared with fiber-optic current sensor module
Light source module is sent to signal processing module for acquiring fiber work temperature information, while by temperature information；
The signal processing module includes current signal processing submodule and processes temperature signal submodule, at the current signal
It manages submodule and connects fiber-optic current sensor module, receive and process current in wire information to be measured, obtain current in wire initial value to be measured,
Processes temperature signal submodule connects optical fiber sensing module, receives and processes operational temperature information, obtains operating temperature value,
Output temperature monitoring result；The current signal processing submodule synchronizes the work temperature for receiving the output of processes temperature signal submodule
Angle value exports accurate current value after compensating operation to current in wire initial value to be measured.
2. a kind of fibre optic current sensor of integrated temperature monitoring according to claim 1, it is characterised in that: the light source
Module includes wideband light source (1).
3. a kind of fibre optic current sensor of integrated temperature monitoring according to claim 1, it is characterised in that: the optical fiber
Current sense module uses reflective Sagnac interference-type current sensor.
4. a kind of fibre optic current sensor of integrated temperature monitoring according to claim 3, it is characterised in that: the optical fiber
Temperature sensing module uses fiber grating temperature sensor, is integrated on the fibre optic current sensor, and common light source mould
Block.
5. a kind of method of the fibre optic current sensor measurement electric current using a kind of integrated temperature monitoring described in claim 1,
Characterized by comprising the following steps:
1) fiber-optic current sensor module acquires current in wire information to be measured, optical fiber sensing module collecting work temperature information；
2) current signal processing submodule receives and processes current in wire information to be measured, obtains electric current initial value, processes temperature signal
Submodule receives and processes operational temperature information, obtains simultaneously output services temperature value；
3) current signal processing submodule is synchronous receives operating temperature value, and output is accurate after compensating calculating to electric current initial value
Current value.
6. a kind of method for measuring electric current according to claim 5, it is characterised in that: in the step 2) at temperature signal
It manages submodule and obtains the function expression that operating temperature value uses are as follows:
ΔλB=CTΔT (1)
In formula (1), Δ λBFor fiber bragg grating center wavelength changing value, CTFor temperature coefficient, Δ T is temperature change value.
7. a kind of method for measuring electric current according to claim 5, it is characterised in that: in the step 2) at current signal
It manages submodule and obtains the function expression that electric current initial value uses are as follows:
Wherein, I is electric current initial value in conducting wire to be measured,For faraday's phase shift, V is Verdet constant, and N is sensing fiber coil
The number of turns.
8. a kind of method for measuring electric current according to claim 5, it is characterised in that: in the step 3) at current signal
Reason submodule compensates the expression formula of calculating to electric current initial value are as follows:
1/V Δ V/ Δ T=0.7 × 10-4/℃ (3)
Wherein, V is the Verdet constant under room temperature state, and Δ V is Verdet constant variable quantity, and Δ T is temperature variation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001721.7A CN109696577A (en) | 2019-01-02 | 2019-01-02 | A kind of fibre optic current sensor and its measurement method of integrated temperature monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001721.7A CN109696577A (en) | 2019-01-02 | 2019-01-02 | A kind of fibre optic current sensor and its measurement method of integrated temperature monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109696577A true CN109696577A (en) | 2019-04-30 |
Family
ID=66232481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910001721.7A Pending CN109696577A (en) | 2019-01-02 | 2019-01-02 | A kind of fibre optic current sensor and its measurement method of integrated temperature monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109696577A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108960A (en) * | 2019-05-16 | 2019-08-09 | 国家电网有限公司 | A kind of portable fiber-optic custom power quality detection and analysis device |
| CN112748387A (en) * | 2021-01-29 | 2021-05-04 | 河北大学 | Current detection method, device and system based on optical fiber current sensor |
| CN114295883A (en) * | 2022-01-06 | 2022-04-08 | 南京大学 | Multi-dimensional calibration method for improving measurement accuracy of optical fiber current sensor |
| CN116295916A (en) * | 2023-05-22 | 2023-06-23 | 常州博瑞电力自动化设备有限公司 | Online monitoring device and monitoring method for temperature of voltage divider |
| CN118275752A (en) * | 2024-03-05 | 2024-07-02 | 徳夫尔工业电子(杭州)有限公司 | Intelligent digital optical fiber sensor and application system thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW234742B (en) * | 1994-03-28 | 1994-11-21 | Ind Tech Res Inst | Optical fiber current sensor with temperature compensation |
| CN102305884A (en) * | 2009-09-04 | 2012-01-04 | 北京齐瑞得电力技术有限公司 | Fiber optical current transformer with fiber optic temperature acquisition and temperature compensation |
| 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 |
| CN103116055A (en) * | 2013-01-29 | 2013-05-22 | 长飞光纤光缆有限公司 | An all-optical fiber current transformer system with temperature measurement function |
| CN104569544A (en) * | 2013-10-07 | 2015-04-29 | 姚晓天 | Faraday current and temperature sensors |
| CN105974172A (en) * | 2016-06-01 | 2016-09-28 | 南京南瑞继保电气有限公司 | All-fiber current transformer based on polarization maintaining fiber temperature sensor |
| CN107091950A (en) * | 2016-02-16 | 2017-08-25 | 姚晓天 | The reflective electric current and magnetic field sensor of TEMP are integrated with based on optical sensing principle |
| CN108254616A (en) * | 2018-03-26 | 2018-07-06 | 南京曦光信息科技有限公司 | A kind of solenoid type optics small electric current sensor with temperature-compensating |
| CN207992311U (en) * | 2018-03-26 | 2018-10-19 | 南京曦光信息科技有限公司 | A kind of solenoid type optics small electric current sensor with temperature-compensating |
-
2019
- 2019-01-02 CN CN201910001721.7A patent/CN109696577A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW234742B (en) * | 1994-03-28 | 1994-11-21 | Ind Tech Res Inst | Optical fiber current sensor with temperature compensation |
| CN102305884A (en) * | 2009-09-04 | 2012-01-04 | 北京齐瑞得电力技术有限公司 | Fiber optical current transformer with fiber optic temperature acquisition and temperature compensation |
| 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 |
| CN103116055A (en) * | 2013-01-29 | 2013-05-22 | 长飞光纤光缆有限公司 | An all-optical fiber current transformer system with temperature measurement function |
| CN104569544A (en) * | 2013-10-07 | 2015-04-29 | 姚晓天 | Faraday current and temperature sensors |
| CN107091950A (en) * | 2016-02-16 | 2017-08-25 | 姚晓天 | The reflective electric current and magnetic field sensor of TEMP are integrated with based on optical sensing principle |
| CN105974172A (en) * | 2016-06-01 | 2016-09-28 | 南京南瑞继保电气有限公司 | All-fiber current transformer based on polarization maintaining fiber temperature sensor |
| CN108254616A (en) * | 2018-03-26 | 2018-07-06 | 南京曦光信息科技有限公司 | A kind of solenoid type optics small electric current sensor with temperature-compensating |
| CN207992311U (en) * | 2018-03-26 | 2018-10-19 | 南京曦光信息科技有限公司 | A kind of solenoid type optics small electric current sensor with temperature-compensating |
Non-Patent Citations (6)
| Title |
|---|
| 尹士玉 等: "全光纤电流互感器温度误差分析与温度误差补偿", 《电测与仪表》 * |
| 李婉欣 等: "光纤光栅温度传感性能测试方法", 《大学物理实验》 * |
| 王景飞 等: "反射式Sagnac干涉光纤电流互感器的传感头误差研究", 《光学与光电技术》 * |
| 肖浩 等: "全光纤电流互感器的温度误差补偿技术", 《电力系统自动化》 * |
| 胡蓓 等: "全光纤电流互感器关键状态量及其监控方法", 《高电压技术》 * |
| 赵俊 等: "基于保偏光纤温度传感器的全光纤电流互感器", 《电力电子技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108960A (en) * | 2019-05-16 | 2019-08-09 | 国家电网有限公司 | A kind of portable fiber-optic custom power quality detection and analysis device |
| CN112748387A (en) * | 2021-01-29 | 2021-05-04 | 河北大学 | Current detection method, device and system based on optical fiber current sensor |
| CN114295883A (en) * | 2022-01-06 | 2022-04-08 | 南京大学 | Multi-dimensional calibration method for improving measurement accuracy of optical fiber current sensor |
| CN114295883B (en) * | 2022-01-06 | 2023-08-22 | 南京大学 | Multi-dimensional calibration method for improving measurement accuracy of optical fiber current sensor |
| CN116295916A (en) * | 2023-05-22 | 2023-06-23 | 常州博瑞电力自动化设备有限公司 | Online monitoring device and monitoring method for temperature of voltage divider |
| CN116295916B (en) * | 2023-05-22 | 2023-10-24 | 常州博瑞电力自动化设备有限公司 | A voltage divider temperature online monitoring device and monitoring method |
| CN118275752A (en) * | 2024-03-05 | 2024-07-02 | 徳夫尔工业电子(杭州)有限公司 | Intelligent digital optical fiber sensor and application system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109696577A (en) | A kind of fibre optic current sensor and its measurement method of integrated temperature monitoring | |
| RU2437106C2 (en) | Fibre-optic current sensor | |
| US5136235A (en) | Rugged fiber-optical current sensor based on the faraday effect | |
| CN103777063B (en) | A kind of fibre optic current sensor | |
| CN101427142B (en) | Optical Fiber Current Sensor Using Polarometric Detection Method | |
| US5371597A (en) | System and method for measuring polarization dependent loss | |
| JP2818300B2 (en) | Optical AC measurement method with temperature compensation and apparatus for implementing the method | |
| CN101915866A (en) | All-fiber current transformer and working method thereof | |
| CN101226210A (en) | Reflection type polarization irrespective miniaturization photo-electricity mutual-inductor | |
| CN101201261A (en) | Integrated measurement systems and methods utilizing optical sensors | |
| CN206496890U (en) | Polarization maintaining optical fibre time delay ring test system | |
| CN102967747B (en) | Temperature-compensation-free fiber optical current transformer and method of double-circuit interference closed loop detection | |
| CN201047858Y (en) | High intensity effect type full optical fiber reflection type optical current mutual inductor | |
| CN109405859B (en) | Multi-path optical fiber current sensor based on wavelength division multiplexing and control method and system thereof | |
| CN101968508B (en) | All-fiber current sensor and polarization state control method thereof | |
| KR20110081444A (en) | Fiber optic current sensor and its sensing method | |
| CN104459267A (en) | Thin film type all-fiber current transformer with temperature compensation | |
| CN104597304A (en) | Ring cavity type all-fiber current sensor | |
| US5471546A (en) | Fiber-optic transmission sensor with modulator | |
| CN101351714A (en) | Optical fiber current sensor | |
| CN108287262A (en) | All-fiber current transformator temperature and vibrational feedback compensation system and measurement method | |
| CN204479632U (en) | A kind of annular cavate all-fiber current sensor | |
| CN114577245B (en) | Optical fiber sensing system capable of simultaneously measuring current and vibration | |
| CN206497197U (en) | Optical fiber sensing ring performance detecting system | |
| CN201749141U (en) | Full fiber current transformer |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190430 |