CN103344311A - Overload protection type optical fiber Bragg grating weighing sensor and icing monitoring system - Google Patents
Overload protection type optical fiber Bragg grating weighing sensor and icing monitoring system Download PDFInfo
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- CN103344311A CN103344311A CN2013102537435A CN201310253743A CN103344311A CN 103344311 A CN103344311 A CN 103344311A CN 2013102537435 A CN2013102537435 A CN 2013102537435A CN 201310253743 A CN201310253743 A CN 201310253743A CN 103344311 A CN103344311 A CN 103344311A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 239000013307 optical fiber Substances 0.000 title abstract description 10
- 238000005303 weighing Methods 0.000 title abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000035945 sensitivity Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 208000012639 Balance disease Diseases 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 230000008014 freezing Effects 0.000 description 1
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- 239000012212 insulator Substances 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
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Abstract
The invention discloses an overload protection type optical fiber Bragg grating weighing sensor and an icing monitoring system in the field of power systems. The overload protection type optical fiber Bragg grating weighing sensor comprises an elastic body, a protection circular shaft, an optical fiber Bragg grating strainmeter and an optical fiber Bragg grating thermometer. The elastic body comprises an upper hanging ring, an upper circular plate, a protection circular hole, a protection cylinder body, a lower circular plate, a lower hanging ring and a U-shaped groove structure. The optical fiber Bragg grating icing monitoring system formed by the overload protection type optical fiber Bragg grating weighing sensors is suitable for measurement in various climates and resistant to electromagnetic interference; the shortcomings that a resistance strain weighing system needs an on-site power supply and multi-point measurement cannot be conducted are overcome; glue is not used for manufacturing the overload protection type optical fiber Bragg grating weighing sensor, so that the problems that a bonding technology using bonder is complex and the glue is prone to aging are solved. The U-shaped groove structure is adopted, so that the resistance to unbalance loading is enhanced under the condition that the sectional area is the same; the overload protection structure which combines the shaft with the hole is adopted, so that the breaking load of the overload protection type optical fiber Bragg grating weighing sensor is increased.
Description
Technical field
The invention belongs to field of power, relate in particular to a kind of overload protection type Fiber Bragg Grating LOAD CELLS and icing monitoring system.
Background technology
In various disasteies, ice damage is often even more serious to the loss that electrical network causes.Icing makes the loading of transmission line of electricity increase, the paralysis of easily cause the circuit broken string, the tower that falls falling the great electric power accident of bar, insulator arc-over etc. even whole electrical network.Serious powerline ice-covering disaster all once took place in north countries such as Norway, the U.S., Canada, Britain, Iceland, Finland, Russia, Japan.China's transmission line of electricity is widely distributed, and environment of living in is abominable, often occurrence of large-area icing event.2008, one in the world rare large tracts of land icing influenced China tens provinces in south, because the sleet freezing weather that continues, cause transmission line of electricity large tracts of land icing, the shaft tower broken string that collapses that can't bear the heavy load, supply line interrupts on a large scale, and electric power facility suffers unprecedented destruction, and direct economic loss is above hundred billion yuan.
The powerline ice-covering on-line monitoring can provide circuit full and accurate icing situation exactly for the staff, greatly reduces operation maintenance personnel's working strength, and reaches real-time and the validity of icing observation.In the ice and snow atrocious weather, when icing appearred on a large scale in circuit, the dispatcher can reasonably remove according to Monitoring Data, the ice-melt decision-making, the infringement that reduces effectively and prevent ice damage to bring.Lot of domestic and foreign experts and scholars have carried out a large amount of fruitful researchs in this field, basically formed these several main icing monitoring methods of video monitoring method, meteorologic analysis method, conductor temperature tilt-angle method and icing method.What wherein be most widely used is weight method.This method is the international method the most direct, the most reliable, that error is minimum, and countries such as Canada, Japan, Russia adopt this method.At present weight method all is that means by electric measurement obtain to the measurement of lead hitch point tension force, what generally adopt is traditional resistance strain type sensor metering system, this sensor production is simple, low price, but it is affected by environment easily, have the bridge balance difficulty, need field power supply, nonlinearity erron is big and be subject to electromagnetic interference (EMI) and can not operation steady in a long-term etc. major issue.In addition, weigh to powerline ice-covering in the place at tangent tower, can not obtain important informations such as wire tension, sag, and anchor support bears than hightension, can reflect the line status in the whole strain section, pulling force sensor is installed at the anchor support place, but in conjunction with multinomial information such as obliquity sensor Monitoring Line icing, lead axial tensile force, sags.Existing Fiber Bragg Grating LOAD CELLS is formed by elastic body and fiber-optic bragg grating sensor bonding, the barbola work complexity, and cementing agent belongs to organism, and under the influence of extraneous factors such as rainwater, cold and hot variation, mechanical property can be lost gradually even can not be used.In addition; Fiber Bragg Grating LOAD CELLS alternative routing gold utensil uses; its pull-off force should be greater than corresponding gold utensil; and existing Fiber Bragg Grating LOAD CELLS does not all have overload protection function; can only increase pull-off force by increasing the elastic body sectional area, but the sensitivity of sensor reduces therefore and greatly.
Summary of the invention
At the existing icing measuring system of mentioning in the background technology be subject to complex electromagnetic environment influence, need field power supply, under abominable humiture environment easy deficiency such as aging, no overcurrent protection structure, the present invention proposes a kind of overload protection type Fiber Bragg Grating LOAD CELLS and icing monitoring system.
A kind of overload protection type Fiber Bragg Grating LOAD CELLS is characterized in that, described LOAD CELLS comprises elastic body, protection circular shaft, Fiber Bragg Grating strainometer, Fiber Bragg Grating thermometer; Described elastic body comprises link, goes up plectane, protection circular hole, protection cylinder, plectane, link and U-shaped groove structure down down;
Wherein, the described link of going up is positioned at elastomeric both sides with following link; The described plectane of going up is connected with U-shaped groove structure with the described link of going up respectively; Described guard column body is positioned at U-shaped groove structure both sides and links to each other with following plectane; Described protection circular shaft is positioned at the protection circular hole;
Described U-shaped groove structure constitutes the strain sensing part of LOAD CELLS;
Described protection circular hole, protection cylinder and protection circular shaft constitute the overload protection part of LOAD CELLS;
Described Fiber Bragg Grating strainometer symmetric points respectively is welded on the central shaft of U-shaped groove structure upper and lower surface;
Described Fiber Bragg Grating thermometer point is welded on the overload protection part.
Described elastic body adopts the disposable one-piece construction that shapes of alloy steel products, but elastomeric material spot welding.
Described overload protection partly adopts axle and hole structure combining; The diameter of described protection circular shaft is used for adjusting the overload protection threshold value by the slit of adjusting between axis hole less than the diameter of protection circular hole.
Described LOAD CELLS also comprises the cylindrical shape encapsulating housing, is used for the encapsulation elastic body, and leaves the optical cable line outlet that diameter is 3mm.
But described Fiber Bragg Grating strainometer adopts firm spot welded type not have the glue encapsulation.
But described Fiber Bragg Grating thermometer adopts firm spot welded type not have the glue encapsulation.
Leave the slit of 0.2mm between described protection cylinder and the U-shaped groove.
Leave the slit of 0.2mm between described protection cylinder and the last plectane.
A kind of icing monitoring system that adopts the described LOAD CELLS of claim 1 to form, it is characterized in that, described system comprises the Fiber Bragg Grating LOAD CELLS, OPGW optical transmission line, Fiber Bragg Grating wavelength demodulation device and supervisory control comuter;
Wherein, described Fiber Bragg Grating LOAD CELLS is installed on the power line tension tower, and described Fiber Bragg Grating LOAD CELLS is connected with the Fiber Bragg Grating (FBG) demodulator by the OPGW optical transmission line; Described Fiber Bragg Grating (FBG) demodulator is connected with supervisory control comuter;
Described Fiber Bragg Grating LOAD CELLS is used for measuring the suffered tension force of lead; Described OPGW optical transmission line is used for the optical signal transmission between realization Fiber Bragg Grating LOAD CELLS and the Fiber Bragg Grating (FBG) demodulator; Described Fiber Bragg Grating (FBG) demodulator is long for the reflection cloth loudspeaker lattice wave of real-time demodulation sensor fibre Bragg grating, and the cloth loudspeaker lattice wave long value that demodulates is sent to supervisory control comuter.
The invention has the beneficial effects as follows that the Fiber Bragg Grating icing monitoring system of being made up of LOAD CELLS provided by the invention is suitable for various weathers to be measured, anti-electromagnetic interference (EMI) is beneficial to long term monitoring; Break through the resistance-strain weighing system and needed field power supply and defective that can't multimetering; Whole sensor does not have the glue making, has solved the problem of using cementing agent barbola work complexity and glue easily to wear out.The strain that measures realizes that by Wavelength-encoding the Fiber Bragg Grating weighing system is not subjected to the influence of the factors such as light-intensity variation, optical fiber connection and coupling loss of light source; Measurement sensitivity is good, resolution is high; Adopt U-shaped groove structure, under the identical situation of sectional area, improved its anti-bias load ability greatly; The overcurrent protection structure that has adopted axis hole to combine had both guaranteed the measurement sensitivity of pulling force, had improved the pull-off force of sensor again greatly.
Description of drawings
Fig. 1 is Fiber Bragg Grating LOAD CELLS cut-away view provided by the invention; Wherein, (a) be the front view of LOAD CELLS inner structure; (b) be the side view of LOAD CELLS inner structure;
Fig. 2 is that provided by the invention a kind of to adopt described LOAD CELLS be to form the structural drawing of Fiber Bragg Grating icing monitoring system;
Wherein, the last link of 1-; The last plectane of 2-; 3-protects circular hole; 4-protects cylinder; Plectane under the 5-; Link under the 6-; 7-protects circular shaft; The 8-U type groove structure; 9-OPGW optical transmission line; 10-Fiber Bragg Grating LOAD CELLS; 11-transformer station.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
Fig. 1 is Fiber Bragg Grating LOAD CELLS cut-away view provided by the invention.Among Fig. 1, described Fiber Bragg Grating LOAD CELLS cut-away view comprises link 1, goes up plectane 2, protection circular hole 3, protection cylinder 4, plectane 5, link 6, protection circular shaft 7 and U-shaped groove structure 8 down down;
Describedly go up link 1, go up plectane 2, protection circular hole 3, protection cylinder 4, down plectane 5, link 6 and U-shaped groove structure 8 are common down constitutes elastic bodys, wherein, describedly go up link 1 and following link 6 is positioned at elastomeric both sides; The described plectane 2 of going up is connected with U-shaped groove structure 8 with the described link 1 of going up respectively; Described protection cylinder 4 is positioned at U-shaped groove structure 8 both sides and links to each other with following plectane 5; Described protection circular shaft 7 is positioned at protection circular hole 3; Whole elastic body is by a disposable one-piece construction that shapes of alloy steel products, little, the good stability of volume; Protection circular shaft 7 is processed separately;
The described link 1 of going up links to each other with PH type gold utensil; Described link 6 down links to each other with U-shaped link;
Described U-shaped groove structure 8 is the strain sensing part of LOAD CELLS, and its xsect is I shape, compares with traditional pole structure, under the situation of same sectional area, increase elastomeric equivalent diameter, improved the moment of inertia in cross section, and then improved elastomeric bending resistance; Rotation angle position adopts round-corner transition in addition, can be so that the stress distribution transition be even, and the output sensitivity height, stress is stable, improves anti-overload ability and the impact resistance of sensor; Described protection circular hole 3, protection cylinder 4 and the protection circular shaft 7 common overload protection parts that constitute LOAD CELLS.When light load action was on LOAD CELLS, U-shaped groove 8 applied elongation and drive protection circular shaft 7 moved; Excessive when load, thereby contacting with the top of protection circular hole 3 and make protection cylinder 4 share most of load, protection circular shaft 7 protected U-shaped groove not broken.The diameter of described protection circular shaft 7 is slightly less than the diameter of protection circular hole 3, adjusts the overload protection threshold value by the slit of adjusting between axis hole.When load during less than threshold value, the transducer sensitivity height; When load during greater than threshold value, slit closure between axis hole, the rectangular column of U-shaped groove structure both sides will be shared load, and then significantly improve pull-off force.
Leave the slit of 0.2mm between described protection cylinder 4 and the U-shaped groove 8, leave the slit of 0.2mm between described protection cylinder 4 and the last plectane 2 equally.
Two Fiber Bragg Grating strainometer symmetric points are welded in the sensitizing range of U-shaped groove upper and lower surfaces.When unbalance loading takes place, the upper and lower surface strain side-play amount of the elastic body that moment of flexure causes equal and opposite in direction, direction is opposite, and the mean value by two face strains overcomes the measured deviation of sensor when unbalance loading and discontinuity.Fiber Bragg Grating thermometer point is welded on the guard column body 4, does not stress in measuring process, has overcome Temperature Influence, has guaranteed the accurate of measurement result.The long variation of cloth loudspeaker lattice wave that returns by analysis Fiber Bragg Grating strainometer and thermometer comes inverse icing situation.
Fig. 2 is that provided by the invention a kind of to adopt described LOAD CELLS be to form the structural drawing of Fiber Bragg Grating icing monitoring system.Among Fig. 2, described system comprises the Fiber Bragg Grating LOAD CELLS, OPGW optical transmission line, Fiber Bragg Grating wavelength demodulation device and supervisory control comuter;
Wherein, described Fiber Bragg Grating LOAD CELLS is installed on the power line tension tower, and described Fiber Bragg Grating LOAD CELLS is connected with the Fiber Bragg Grating (FBG) demodulator by the OPGW optical transmission line; Described Fiber Bragg Grating (FBG) demodulator is connected with supervisory control comuter;
Described Fiber Bragg Grating LOAD CELLS is used for measuring the suffered tension force of lead; Described OPGW optical transmission line is used for the optical signal transmission between realization Fiber Bragg Grating LOAD CELLS and the Fiber Bragg Grating (FBG) demodulator; Described Fiber Bragg Grating (FBG) demodulator is long for the reflection cloth loudspeaker lattice wave of real-time demodulation sensor fibre Bragg grating, and the cloth loudspeaker lattice wave long value that demodulates is sent to supervisory control comuter.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. an overload protection type Fiber Bragg Grating LOAD CELLS is characterized in that, described LOAD CELLS comprises elastic body, protection circular shaft, Fiber Bragg Grating strainometer, Fiber Bragg Grating thermometer; Described elastic body comprises link, goes up plectane, protection circular hole, protection cylinder, plectane, link and U-shaped groove structure down down;
Wherein, the described link of going up is positioned at elastomeric both sides with following link; The described plectane of going up is connected with U-shaped groove structure with the described link of going up respectively; Described guard column body is positioned at U-shaped groove structure both sides and links to each other with following plectane; Described protection circular shaft is positioned at the protection circular hole;
Described U-shaped groove structure constitutes the strain sensing part of LOAD CELLS;
Described protection circular hole, protection cylinder and protection circular shaft constitute the overload protection part of LOAD CELLS;
Described Fiber Bragg Grating strainometer symmetric points respectively is welded on the central shaft of U-shaped groove structure upper and lower surface;
Described Fiber Bragg Grating thermometer point is welded on the overload protection part.
2. according to the described LOAD CELLS of claim 1, it is characterized in that described elastic body is disposable one-piece construction that shapes of alloy steel products of employing, but elastomeric material spot welding.
3. according to the described LOAD CELLS of claim 1, it is characterized in that described overload protection partly adopts axle and hole structure combining; The diameter of described protection circular shaft is used for adjusting the overload protection threshold value by the slit of adjusting between axis hole less than the diameter of protection circular hole.
4. according to the described LOAD CELLS of claim 1, it is characterized in that described LOAD CELLS also comprises the cylindrical shape encapsulating housing, be used for the encapsulation elastic body, and leave the optical cable line outlet that diameter is 3mm.
5. according to the described LOAD CELLS of claim 1, it is characterized in that, but described Fiber Bragg Grating strainometer adopts firm spot welded type not have the glue encapsulation.
6. according to the described LOAD CELLS of claim 1, it is characterized in that, but described Fiber Bragg Grating thermometer adopts firm spot welded type not have the glue encapsulation.
7. according to the described LOAD CELLS of claim 1, it is characterized in that, leave the slit of 0.2mm between described protection cylinder and the U-shaped groove.
8. according to the described LOAD CELLS of claim 1, it is characterized in that, leave the slit of 0.2mm between described protection cylinder and the last plectane.
9. icing monitoring system that adopts the described LOAD CELLS of claim 1 to form, it is characterized in that, described system comprises the Fiber Bragg Grating LOAD CELLS, OPGW optical transmission line, Fiber Bragg Grating wavelength demodulation device and supervisory control comuter;
Wherein, described Fiber Bragg Grating LOAD CELLS is installed on the power line tension tower, and described Fiber Bragg Grating LOAD CELLS is connected with the Fiber Bragg Grating (FBG) demodulator by the OPGW optical transmission line; Described Fiber Bragg Grating (FBG) demodulator is connected with supervisory control comuter;
Described Fiber Bragg Grating LOAD CELLS is used for measuring the suffered tension force of lead; Described OPGW optical transmission line is used for the optical signal transmission between realization Fiber Bragg Grating LOAD CELLS and the Fiber Bragg Grating (FBG) demodulator; Described Fiber Bragg Grating (FBG) demodulator is long for the reflection cloth loudspeaker lattice wave of real-time demodulation sensor fibre Bragg grating, and the cloth loudspeaker lattice wave long value that demodulates is sent to supervisory control comuter.
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| CN201310253743.5A CN103344311B (en) | 2013-06-24 | 2013-06-24 | Overload protection type optical fiber Bragg grating weighing sensor and icing monitoring system |
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| CN201310253743.5A CN103344311B (en) | 2013-06-24 | 2013-06-24 | Overload protection type optical fiber Bragg grating weighing sensor and icing monitoring system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953956A (en) * | 2016-04-21 | 2016-09-21 | 华北电力大学 | Large-capacity power transmission line strain tower strain measuring device |
| CN106871827A (en) * | 2017-03-31 | 2017-06-20 | 国家电网公司 | Portable power transmission line sag detection means |
| CN108444625A (en) * | 2018-06-25 | 2018-08-24 | 云南电网有限责任公司昭通供电局 | A kind of pulling force sensor and method for detecting ice coating for powerline ice-covering detection |
| CN110514177A (en) * | 2019-08-30 | 2019-11-29 | 云南电网有限责任公司昆明供电局 | A kind of online Quantitative Monitoring system of pipe mother support insulator gradient |
| CN110553704A (en) * | 2018-05-31 | 2019-12-10 | 梅特勒-托利多(常州)测量技术有限公司 | Hanging scale and weighing structure and weighing method thereof |
| WO2024108183A1 (en) * | 2022-11-17 | 2024-05-23 | Ctc Global Corporation | Systems and methods for operating an overhead electrical line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108444625B (en) * | 2018-06-25 | 2023-09-08 | 云南电网有限责任公司昭通供电局 | Tension sensor for detecting icing of power transmission line and icing detection method |
| CN110514177A (en) * | 2019-08-30 | 2019-11-29 | 云南电网有限责任公司昆明供电局 | A kind of online Quantitative Monitoring system of pipe mother support insulator gradient |
| WO2024108183A1 (en) * | 2022-11-17 | 2024-05-23 | Ctc Global Corporation | Systems and methods for operating an overhead electrical line |
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|---|---|
| CN103344311B (en) | 2015-04-15 |
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