CN102721853A - Optical fiber Bragg grating voltage sensor based on Rogowski coil - Google Patents
Optical fiber Bragg grating voltage sensor based on Rogowski coil Download PDFInfo
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- CN102721853A CN102721853A CN2012102241179A CN201210224117A CN102721853A CN 102721853 A CN102721853 A CN 102721853A CN 2012102241179 A CN2012102241179 A CN 2012102241179A CN 201210224117 A CN201210224117 A CN 201210224117A CN 102721853 A CN102721853 A CN 102721853A
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- optical fiber
- fiber bragg
- coil
- luo
- bragg raster
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 63
- 239000000919 ceramic Substances 0.000 claims abstract description 34
- 239000000853 adhesive Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005291 magnetic effect Effects 0.000 abstract description 2
- 230000001052 transient effect Effects 0.000 abstract description 2
- 208000032365 Electromagnetic interference Diseases 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 5
- 238000006467 substitution reaction Methods 0.000 description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The invention relates to an optical fiber Bragg grating voltage sensor based on a Rogowski coil, and belongs to the technical field of photoelectronic measurement. An optical fiber Bragg grating is connected with an external optical fiber, adhered to a piezoelectric ceramic through adhesive points and parallel to the piezoelectric ceramic; the Rogowski coil is connected to the upper end and the lower end of the piezoelectric ceramic through an output signal positive electrode and an output signal negative electrode and sleeved on a wire; and the wire is connected with an A-phase bus and a ground phase bus through resistive capacitors to form a loop. The Rogowski coil is not provided with an iron core, so that magnetic saturation and a hysteresis effect are avoided; the optical fiber Bragg grating is an electric insulation material and extremely high in electro-magnetic interference (EMI) resistance; and therefore, the optical fiber Bragg grating voltage sensor is extremely high in transient tracking capacity, responds to voltage change and is simple in structure and accurate in measurement.
Description
Technical field
The present invention relates to a kind of optical fiber Bragg raster voltage sensor, belong to the photoelectron field of measuring technique based on Luo-coil.
Background technology
Luo-coil (Rogowski coil) is the current measurement coil again, is the toroid winding of a uniform winding on nonferromugnetic material, does not contain iron core; There is not ferromagnetic saturation problem; Do not have hysteresis effect, the tested electric current of response that can be rapidly has low-power output, good characteristic such as simple in structure, linear good; Under many Super-Current Measurement occasions, it all is the first-selected object of Sensitive Apparatus.For example: Jia Chunrong, Di Zhigang, Zhang Qingling etc., " research and the design of current transformer sensing head Rogowski coil ", " High-Voltage Electrical Appliances ",, the 46th volume, the 3rd phase, 15-18 in 2010.But because the Luo-coil induction is change in current, it is sensitive voltage directly.
Summary of the invention
To the problems referred to above; The present invention provides a kind of optical fiber Bragg raster voltage sensor based on Luo-coil; In high-voltage electric power circuit, insert a pull-up resistor, be socketed in Luo-coil on the resistance, the product through load current in the resistance and resistance value is exactly the real-time voltage in the circuit; Induce the variation of load current through Luo-coil, thereby realize real-time monitoring voltage in the circuit.
The technical scheme that the present invention adopts: a kind of optical fiber Bragg raster voltage sensor based on Luo-coil; Comprise external optical fiber 1; Adhesive spots
2, optical fiber Bragg raster 3, adhesive spots
4; Output signal anodal 5; Piezoelectric ceramics 6, output signal negative pole 7, Luo-coil 8; Lead 9; Capacitance-resistance 10, ground phase bus 11, A phase bus 12; Optical fiber Bragg raster 3 links to each other with external optical fiber 1; Optical fiber Bragg raster 3 is bonded on the piezoelectric ceramics 6 through adhesive spots
2 and adhesive spots
4; Optical fiber Bragg raster 3 and piezoelectric ceramics 6 keeping parallelisms; Luo-coil 8 is connected piezoelectric ceramics through output signal anodal 5 and output signal negative pole 7, and about in the of 6 two ends; Luo-coil 8 is enclosed within on the lead 9, lead 9 through capacitance-resistance 10 connect A phase bus 12, phase bus 11 formation loops.
A kind of method of application of the optical fiber Bragg raster voltage sensor based on Luo-coil: A phase bus 12, phase bus 11 be connected through lead 9 with capacitance-resistance 10; And formation loop; Luo-coil 8 is enclosed within on the lead 9; Luo-coil 8 is the low-voltage that is converted into of the big electric current linearity of process capacitance-resistance; Utilize the inverse piezoelectric effect of piezoelectric ceramics 6; When two ends add voltage about it; Piezoelectric ceramics 6 right ends expand; The optical fiber Bragg raster 3 that is bonded on the piezoelectric ceramics 6 is shifted; Optical fiber Bragg raster 3 is through external optical fiber 1; Utilize (FBG) demodulator to obtain the shift value of optical fiber Bragg raster centre wavelength; Utilize formula
;
is the centre wavelength of optical fiber Bragg raster in the formula;
is the wavelength-shift amount;
=0.22 is valid round-spectrum number;
is the axial strain amount;
is the loop actual current and the standard ratio of Luo-coil induction electromotive force; Z is for inserting impedance, and
is the constant relevant with stretching structure with the piezoelectric modulus of piezoelectric ceramics; Can calculate magnitude of voltage, thereby realize the corresponding relation of wavelength and voltage, so just can monitor in real time voltage.
Described external optical fiber 1; Adhesive spots
2, optical fiber Bragg raster 3, adhesive spots
4; Output signal anodal 5; Piezoelectric ceramics 6, output signal negative pole 7, Luo-coil 8; Lead 9; Capacitance-resistance 10, ground phase bus 11, A phase bus 12 is commercially available common components.
The invention has the beneficial effects as follows: not containing iron core among the present invention in the Luo-coil does not have magnetic saturation, no hysteresis effect; Optical fiber Bragg raster is an electrically insulating material, has very strong anti-electromagnetic interference capability (EMI); Have splendid transient tracking ability, response voltage and change the level that to reach
; Simultaneously; Simple in structure, measure accurately.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: the external optical fiber of 1-; 2-adhesive spots
, 3-optical fiber Bragg raster, 4-adhesive spots
; 5-output signal is anodal; The 6-piezoelectric ceramics, 7-output signal negative pole, 8-Luo-coil; The 9-lead; The 10-capacitance-resistance, 11-ground phase bus, 12-A phase bus.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified, understand to make things convenient for the technician.
As shown in Figure 1: a kind of optical fiber Bragg raster voltage sensor based on Luo-coil comprises external optical fiber 1, adhesive spots
2; Optical fiber Bragg raster 3; Adhesive spots
4, output signal positive pole 5, piezoelectric ceramics 6; Output signal negative pole 7; Luo-coil 8, lead 9, capacitance-resistance 10; Ground phase bus 11, A phase bus 12; Optical fiber Bragg raster 3 links to each other with external optical fiber 1; Optical fiber Bragg raster 3 is bonded on the piezoelectric ceramics 6 through adhesive spots
2 and adhesive spots
4; Optical fiber Bragg raster 3 and piezoelectric ceramics 6 keeping parallelisms; Luo-coil 8 is connected piezoelectric ceramics through output signal anodal 5 and output signal negative pole 7, and about in the of 6 two ends; Luo-coil 8 is enclosed within on the lead 9, lead 9 through capacitance-resistance 10 connect A phase bus 12, phase bus 11 formation loops.
A kind of method of application of the optical fiber Bragg raster voltage sensor based on Luo-coil: A phase bus 12, phase bus 11 be connected through lead 9 with capacitance-resistance 10; And formation loop; Luo-coil 8 is enclosed within on the lead 9; Luo-coil 8 is the low-voltage that is converted into of the big electric current linearity of process capacitance-resistance; Utilize the inverse piezoelectric effect of piezoelectric ceramics 6; When two ends add voltage about it; Piezoelectric ceramics 6 right ends expand; The optical fiber Bragg raster 3 that is bonded on the piezoelectric ceramics 6 is shifted; Optical fiber Bragg raster 3 is through external optical fiber 1; Utilize (FBG) demodulator to obtain the shift value of optical fiber Bragg raster centre wavelength; Utilize formula
;
is the centre wavelength of optical fiber Bragg raster in the formula;
is the wavelength-shift amount;
=0.22 is valid round-spectrum number;
is the axial strain amount;
is the loop actual current and the standard ratio of Luo-coil induction electromotive force; Z is for inserting impedance, and
is the constant relevant with stretching structure with the piezoelectric modulus of piezoelectric ceramics; Can calculate magnitude of voltage, thereby realize the corresponding relation of wavelength and voltage, so just can monitor in real time voltage.
The mathematical model of measuring technique of the present invention is following:
The wavelength-shift that the even axial strain of optical fiber Bragg raster causes is:
In the formula (1);
is the centre wavelength of optical fiber Bragg raster;
is the wavelength-shift amount;
=0.22 is valid round-spectrum number,
be the axial strain amount.
And axial strain amount
can be expressed as as follows:
In the formula (2);
is FBG place length of fiber, and
is the axial tension of optical fiber.
When tested electric current when axis passes circular Rockwell coil, on coil, produce induced electromotive force
Can obtain in the loop electric current promptly through the induction electromotive force on the coil being carried out integration:
In side circuit:
（5）
Z is for inserting impedance
Getting the electromotive force that produces on the coil at last is:
Induced electromotive force is added on the bar shaped piezoelectric ceramics, and the elongation of piezoelectric ceramics
is following with an alive relation:
The elongation of piezoelectric ceramics
equates with optical fiber axial tension
, that is:
Wushu (8), formula (7) and formula (6) substitution formula (2) can get the relation of fiber axis to dependent variable
and tested voltage:
Get
(10) to (9) formula substitution (1) formula
Formula (10) has shown the mathematical model between the Bragg wavelength-shift of voltage sensor actual measurement voltage and optical fiber Bragg raster, and the Bragg wavelength-shift through the measuring light fiber Bragg grating can calculate voltage sensor actual measurement voltage.
Embodiment
Concrete parameter in actual fabrication is:
1, the electric pressure of selecting 500KV for use is as the actual measurement circuit;
2, Luo-coil is selected for use: it is 4V that the corresponding secondary of actual measurement rated current 1000A is responded to specified electromotive force, and promptly the loop actual current is 1000A/4V with the standard ratio of Luo-coil induction electromotive force;
3, the piezoelectric modulus of piezoelectric ceramics constant K=1.16 * 10 relevant with stretching structure
-5/ V;
4, insert resistance
5, optical fiber Bragg raster technical parameter: centre wavelength
nm, valid round-spectrum number
;
6, measure the sensor fibre effective length and get 100mm;
7, press accompanying drawing 1 configuration experiment;
8, obtain the Bragg wavelength of optical fiber Bragg raster with the fiber grating analyser;
9, according to formula (10), the Bragg wavelength-shift of optical fiber Bragg raster to the response sensitivity of actual measurement voltage is:
10, with known quantity substitution formula (11), Theoretical Calculation shows that the sensitivity of this voltage sensor is 1.122pm/KV.Therefore, when the wavelength resolution of optical fiber Bragg raster (FBG) demodulator was 1pm, the resolution of this sensor was 0.89KV.
11, the response time of voltage transformer (VT) is meant that input signal is when zero jumps to a ratings; The output signal rises to 90% o'clock required time from 10% of the output valve of deciding of an expection, and the voltage responsive time that Theoretical Calculation draws this voltage sensor is 10 μ s.
The present invention describes through the practical implementation process; Without departing from the present invention; Can also carry out various conversion and be equal to replacement patent of the present invention; Therefore, patent of the present invention is not limited to disclosed practical implementation process, and should comprise the whole embodiments that fall in the Patent right requirement scope of the present invention.
Claims (2)
1. optical fiber Bragg raster voltage sensor based on Luo-coil; It is characterized in that: comprise external optical fiber; Adhesive spots
, optical fiber Bragg raster, adhesive spots
; The output signal is anodal; Piezoelectric ceramics, output signal negative pole, Luo-coil; Lead; Capacitance-resistance, ground phase bus, A phase bus; Optical fiber Bragg raster links to each other with external optical fiber; Optical fiber Bragg raster is bonded on the piezoelectric ceramics through adhesive spots
and adhesive spots
; Optical fiber Bragg raster and piezoelectric ceramics keeping parallelism; Luo-coil is connected piezoelectric ceramics two ends up and down through the output signal is anodal with output signal negative pole; Luo-coil is enclosed within on the lead, lead through capacitance-resistance connect A phase bus, the phase bus constitute the loop.
2. method of application based on the optical fiber Bragg raster voltage sensor of Luo-coil; It is characterized in that: the method for application of described a kind of optical fiber Bragg raster voltage sensor based on Luo-coil be A phase bus, the phase bus be connected through lead with capacitance-resistance; And formation loop; Luo-coil is enclosed within on the lead; Luo-coil is the low-voltage that is converted into of the big electric current linearity of process capacitance-resistance; Utilize the inverse piezoelectric effect of piezoelectric ceramics; When two ends add voltage about it; The piezoelectric ceramics right ends expands; The optical fiber Bragg raster that is bonded on the piezoelectric ceramics is shifted; Optical fiber Bragg raster is through external optical fiber; Utilize (FBG) demodulator to obtain the shift value of optical fiber Bragg raster centre wavelength; Utilize formula
;
is the centre wavelength of optical fiber Bragg raster in the formula;
is the wavelength-shift amount;
=0.22 is valid round-spectrum number;
is the axial strain amount;
is the loop actual current and the standard ratio of Luo-coil induction electromotive force; Z is for inserting impedance;
is the constant relevant with stretching structure with the piezoelectric modulus of piezoelectric ceramics, thereby can calculate magnitude of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102241179A CN102721853A (en) | 2012-07-02 | 2012-07-02 | Optical fiber Bragg grating voltage sensor based on Rogowski coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102241179A CN102721853A (en) | 2012-07-02 | 2012-07-02 | Optical fiber Bragg grating voltage sensor based on Rogowski coil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149413A (en) * | 2013-03-05 | 2013-06-12 | 昆明理工大学 | Piezoelectric actuation type optical fiber Bragg grating current sensor based on LPCT (low-power current transducer) and use method thereof |
| CN103176031A (en) * | 2013-03-04 | 2013-06-26 | 昆明理工大学 | Rogowski-coil-based piezoelectric drive fiber Bragg grating current sensor and application method thereof |
| CN103439561A (en) * | 2013-08-26 | 2013-12-11 | 石家庄经济学院 | High-sensitivity fiber grating voltage sensor |
| CN104020338A (en) * | 2014-06-23 | 2014-09-03 | 哈尔滨理工大学 | Optical-fiber Bragg grating electrostatic voltage measuring system based on uniform strain beam and measuring method implemented by use of system |
| CN104049124A (en) * | 2014-06-27 | 2014-09-17 | 上海交通大学 | High-voltage electric field measuring method and device based on non-vertical fiber bragg gratings |
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| JPH0743395A (en) * | 1993-07-27 | 1995-02-14 | Sumitomo Electric Ind Ltd | Optical interference voltage sensor |
| CN201100865Y (en) * | 2007-08-28 | 2008-08-13 | 天津爱天光电子科技有限公司 | Small current low voltage optical grating sensor |
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| CN202649283U (en) * | 2012-07-02 | 2013-01-02 | 昆明理工大学 | Fiber Bragg voltage raster voltage sensor based on Rogowski coil |
-
2012
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Patent Citations (4)
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|---|---|---|---|---|
| JPH0743395A (en) * | 1993-07-27 | 1995-02-14 | Sumitomo Electric Ind Ltd | Optical interference voltage sensor |
| CA2347749C (en) * | 1998-10-31 | 2008-12-16 | The Texas A & M University System | Fiber optic current sensor |
| CN201100865Y (en) * | 2007-08-28 | 2008-08-13 | 天津爱天光电子科技有限公司 | Small current low voltage optical grating sensor |
| CN202649283U (en) * | 2012-07-02 | 2013-01-02 | 昆明理工大学 | Fiber Bragg voltage raster voltage sensor based on Rogowski coil |
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|---|
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176031A (en) * | 2013-03-04 | 2013-06-26 | 昆明理工大学 | Rogowski-coil-based piezoelectric drive fiber Bragg grating current sensor and application method thereof |
| CN103149413A (en) * | 2013-03-05 | 2013-06-12 | 昆明理工大学 | Piezoelectric actuation type optical fiber Bragg grating current sensor based on LPCT (low-power current transducer) and use method thereof |
| CN103439561A (en) * | 2013-08-26 | 2013-12-11 | 石家庄经济学院 | High-sensitivity fiber grating voltage sensor |
| CN103439561B (en) * | 2013-08-26 | 2015-11-18 | 石家庄经济学院 | A kind of high-sensitive fiber grating voltage sensor |
| CN104020338A (en) * | 2014-06-23 | 2014-09-03 | 哈尔滨理工大学 | Optical-fiber Bragg grating electrostatic voltage measuring system based on uniform strain beam and measuring method implemented by use of system |
| CN104020338B (en) * | 2014-06-23 | 2016-08-24 | 哈尔滨理工大学 | System and the measuring method using this system to realize is measured based on the optical fiber Bragg raster electrostatic potential waiting strain beam |
| CN104049124A (en) * | 2014-06-27 | 2014-09-17 | 上海交通大学 | High-voltage electric field measuring method and device based on non-vertical fiber bragg gratings |
| CN104049124B (en) * | 2014-06-27 | 2017-01-11 | 上海交通大学 | High-voltage electric field measuring method and device based on non-vertical fiber bragg gratings |
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Application publication date: 20121010 |