CN202649283U - Fiber Bragg voltage raster voltage sensor based on Rogowski coil - Google Patents
Fiber Bragg voltage raster voltage sensor based on Rogowski coil Download PDFInfo
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- CN202649283U CN202649283U CN201220314877.4U CN201220314877U CN202649283U CN 202649283 U CN202649283 U CN 202649283U CN 201220314877 U CN201220314877 U CN 201220314877U CN 202649283 U CN202649283 U CN 202649283U
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- fiber bragg
- optical fiber
- bragg grating
- rogowski coil
- piezoelectric ceramics
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- 239000013307 optical fiber Substances 0.000 claims abstract description 45
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 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
- 239000011810 insulating material Substances 0.000 abstract 1
- 230000005693 optoelectronics Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- 230000008033 biological extinction Effects 0.000 description 3
- 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
- 238000013461 design Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
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Abstract
本实用新型涉及一种基于罗氏线圈的光纤Bragg光栅电压传感器，属于光电子测量技术领域。光纤Bragg光栅与外接光纤相连，光纤Bragg光栅通过粘接点
The utility model relates to a Rogowski coil-based optical fiber Bragg grating voltage sensor, which belongs to the technical field of optoelectronic measurement. The fiber Bragg grating is connected to the external optical fiber, and the fiber Bragg grating passes through the bonding point
Description
Technical field
The utility model relates to a kind of optical fiber Bragg raster voltage sensor based on Luo-coil, belongs to the photoelectron field of measuring technique.
Background technology
Luo-coil (Rogowski coil) is again the current measurement coil, the toroid winding of a uniform winding on nonferromugnetic material, do 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, the good characteristic such as simple in structure, linear good, under many Super-Current Measurement occasions, it all is the first choice 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 the variation of electric current, it is sensitive voltage directly.
The utility model content
For the problems referred to above, the utility model provides a kind of optical fiber Bragg raster voltage sensor based on Luo-coil, pull-up resistor of access in high-voltage electric power circuit, Luo-coil is socketed on the resistance, product by the load current in the resistance and resistance value is exactly the real-time voltage in the circuit, induce the variation of load current by Luo-coil, thereby realize the Real-Time Monitoring to voltage in the circuit.
The technical solution adopted in the utility model: 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, wire 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, and optical fiber Bragg raster 3 passes through adhesive spots
2 and adhesive spots
4 are bonded on the piezoelectric ceramics 6, optical fiber Bragg raster 3 and piezoelectric ceramics 6 keeping parallelisms, Luo-coil 8 is connected to piezoelectric ceramics by 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 wire 9, wire 9 by capacitance-resistance 10 connect A phase buses 12, phase bus 11 consist of loops.
Described 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, wire 9, capacitance-resistance 10, ground phase bus 11, A phase bus 12 is commercially available common components.
The beneficial effects of the utility model are: do not contain iron core in the utility model in the Luo-coil without magnetic saturation, without hysteresis effect; Optical fiber Bragg raster is electrically insulating material, has very strong anti-electromagnetic interference capability (EMI); Having splendid transient tracking ability, response voltage changes and can reach
Level, simple in structure simultaneously, measure accurately.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: the external optical fiber of 1-, 2-adhesive spots
, 3-optical fiber Bragg raster, 4-adhesive spots
, the 5-output signal is anodal, 6-piezoelectric ceramics, 7-output signal negative pole, 8-Luo-coil, 9-wire, 10-capacitance-resistance, 11-ground phase bus, 12-A phase bus.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further, understands 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, wire 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, and optical fiber Bragg raster 3 passes through adhesive spots
2 and adhesive spots
4 are bonded on the piezoelectric ceramics 6, optical fiber Bragg raster 3 and piezoelectric ceramics 6 keeping parallelisms, Luo-coil 8 is connected to piezoelectric ceramics by 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 wire 9, wire 9 by capacitance-resistance 10 connect A phase buses 12, phase bus 11 consist of loops.
The using method of described a kind of optical fiber Bragg raster voltage sensor based on Luo-coil: A phase bus 12, ground phase bus 11 is connected by wire 9 with capacitance-resistance 10, and formation loop, Luo-coil 8 is enclosed within on the wire 9, Luo-coil 8 is the low-voltage that is converted into of the large electric current linearity of process capacitance-resistance, utilize the inverse piezoelectric effect of piezoelectric ceramics 6, when two ends add voltage about it, expand in two ends, piezoelectric ceramics 6 left and right sides, the optical fiber Bragg raster 3 that is bonded on the piezoelectric ceramics 6 is shifted, optical fiber Bragg raster 3 is by external optical fiber 1, utilize (FBG) demodulator to obtain the shift value of optical fiber Bragg raster centre wavelength, utilize formula
, in the formula
Be the centre wavelength of optical fiber Bragg raster,
Be the wavelength-shift amount,
=0.22 is valid round-backscatter extinction logarithmic ratio,
Be the axial strain amount,
Be the standard ratio of loop actual current with the Luo-coil induction electromotive force, Z is termination,
Be 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 carry out Real-Time Monitoring to voltage.
The mathematical model of the utility model measuring technique is as follows:
The wavelength-shift that the even axial strain of optical fiber Bragg raster causes is:
In the formula (1),
Be the centre wavelength of optical fiber Bragg raster,
Be the wavelength-shift amount,
=0.22 is valid round-backscatter extinction logarithmic ratio,
Be the axial strain amount.
And the axial strain amount
Can be expressed as:
In the formula (2),
Be the length of FBG place optical fiber,
Axial tension for optical fiber.
When tested electric current passes circular Rockwell coil along axis, produce induced electromotive force at coil
（3）
Can obtain in the loop electric current namely by the induction electromotive force on the coil being carried out integration:
In side circuit:
Z is termination
Getting at last the electromotive force that produces on the coil is:
Induced electromotive force is added on the bar shaped piezoelectric ceramics, the elongation of piezoelectric ceramics
As follows with an alive relation:
The elongation of piezoelectric ceramics
With the optical fiber axial tension
Equate, that is:
Wushu (8), formula (7) and formula (6) substitution formula (2) can get fiber axis to dependent variable
Relation with tested voltage:
（9）
(9) formula substitution (1) formula is got
(10)
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 by measuring optical fiber Bragg grating can calculate voltage sensor actual measurement voltage.
Embodiment
Design parameter in actual fabrication is:
1, select the electric pressure of 500KV as the actual measurement circuit;
2, Luo-coil is selected: it is 4V that the corresponding secondary of actual measurement rated current 1000A is responded to specified electromotive force, and namely the loop actual current is 1000A/4V with the standard ratio of Luo-coil induction electromotive force;
3, the piezoelectric modulus of the piezoelectric ceramics constant K=1.16 relevant with stretching structure * 10
-5/ V;
4, access resistance
5, optical fiber Bragg raster technical parameter: centre wavelength
Nm, valid round-backscatter extinction logarithmic ratio
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), theory is calculated and is shown, 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.
When 11, the response time of voltage transformer (VT) refers to that input signal jumps to a ratings from zero, output signal is decided 10% of output valve required time when rising to 90% from an expection, and the reaction time that theory calculates this voltage sensor is 10 μ s.
The utility model describes by specific implementation process, in the situation that do not break away from the utility model scope, can also carry out various conversion and be equal to replacement the utility model patent, therefore, the utility model patent is not limited to disclosed specific implementation process, and should comprise the whole embodiments that fall in the utility model Patent right requirement scope.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220314877.4U CN202649283U (en) | 2012-07-02 | 2012-07-02 | Fiber Bragg voltage raster voltage sensor based on Rogowski coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220314877.4U CN202649283U (en) | 2012-07-02 | 2012-07-02 | Fiber Bragg voltage raster voltage sensor based on Rogowski coil |
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| Publication Number | Publication Date |
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| CN202649283U true CN202649283U (en) | 2013-01-02 |
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| CN201220314877.4U Expired - Fee Related CN202649283U (en) | 2012-07-02 | 2012-07-02 | Fiber Bragg voltage raster voltage sensor based on Rogowski coil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721853A (en) * | 2012-07-02 | 2012-10-10 | 昆明理工大学 | Optical fiber Bragg grating voltage sensor based on Rogowski coil |
| CN109633234A (en) * | 2018-12-26 | 2019-04-16 | 西安交通大学 | A kind of fiber grating electric-field sensor of high sensitivity |
-
2012
- 2012-07-02 CN CN201220314877.4U patent/CN202649283U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721853A (en) * | 2012-07-02 | 2012-10-10 | 昆明理工大学 | Optical fiber Bragg grating voltage sensor based on Rogowski coil |
| CN109633234A (en) * | 2018-12-26 | 2019-04-16 | 西安交通大学 | A kind of fiber grating electric-field sensor of high sensitivity |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20150702 |
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| EXPY | Termination of patent right or utility model |