CN202230101U - Fiber grating based power transmission line swaying monitoring sensing apparatus - Google Patents
Fiber grating based power transmission line swaying monitoring sensing apparatus Download PDFInfo
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- CN202230101U CN202230101U CN2011200351387U CN201120035138U CN202230101U CN 202230101 U CN202230101 U CN 202230101U CN 2011200351387 U CN2011200351387 U CN 2011200351387U CN 201120035138 U CN201120035138 U CN 201120035138U CN 202230101 U CN202230101 U CN 202230101U
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- transmission line
- fiber grating
- power transmission
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Abstract
The utility model relates to the technical field of power equipment monitoring, in particular to a fiber grating based power transmission line swaying monitoring sensing apparatus, comprising hanging ears, a housing, mass blocks and sensing members, wherein the hanging ears are fixedly connected with the housing to form an integrated body, the left side of the inner wall of the housing is provided with an outwards-extending elastic cantilever beam, the right end of the beam is provided with one mass block, the bottom of the inner wall is provided with an outwards-extending elastic beam, the end portion of the elastic beam is provided with one mass block, the mass blocks and the beams are integrated in one, and at the periphery of two fixed ends of the two beams there are provided two fiber grating stress sensing elements along the extending direction. The fiber grating based power transmission line swaying monitoring sensing apparatus is strong in anti-electromagnetic interference capability, high in sensitivity, small in volume and light in weight, and is corrosion resistant, etc., and is suitable for monitoring the swaying of power transmission lines under a complex environment.
Description
Technical field
The utility model belongs to the power equipment monitoring technical field, relates to a kind of sensing device that is used for transmission line galloping state on_line monitoring system, is specifically related to the sensing device in a kind of transmission line galloping on-line monitoring system.
Background technology
Transmission line galloping be ice covering on transmission lines the effect of wind excitation down a kind of low frequency of generation (be about 0.1～3Hz), the autovibration of large amplitude (peak swing can reach 5～300 times of diameter of wire).The amplitude of waving of transmission line of electricity is big; Longer duration, the security of operation formation grave danger to transmission line of electricity is prone to cause alternate flashover, gold utensil to damage; Shaft tower collapses; Lead major accident such as fracture causes great economic loss and social influence, is the major safety risks that influence the transmission line of electricity operation.
China is that circuit is waved one of frequent country of generation, and relevant record starts from generation nineteen fifty.Progress along with China's power industry; High pressure and supertension line are extensively built, and big span, major diameter, divide power transmission line widespread usage more, and it is very important that circuit is waved problem; Especially at some with a varied topography and big leap line segment, the problem of waving more should come into one's own.
It is the domestic and international research hot issue that transmission pressure is waved, and the theoretical and inhibition technology of waving of waving to transmission pressure has obtained certain achievement.It is generally acknowledged that the formation of waving depends primarily on three aspect factor: icing, wind excitation and line construction and parameter.Because the randomness of these factors, the case is extremely complicated to make waving of being taken place in the actual engineering.Therefore, the online detection of research transmission line galloping state and early warning system are very necessary.
For the online measuring technique system development of transmission line galloping state, waving the monitoring sensing device is the matter of utmost importance that needs solution.More existing in this regard in the past researchs, major technique concentrate on sensing device aspects such as the displacement, acceleration of piezoelectricity, resistance strain gage and various elastic sensing element formation.
But it should be noted that; The test of waving to ultra-high-tension power transmission line; If adopt the electrical quantity sensor of former studies, have totally unfavorable influence factor: the powerful alternating electromagnetic field of (1) circuit possibly produce higher induced voltage on the lead-in wire of electric weight sensing device; (2) size of insulator hardware is narrow and small, and the quality of larger volume sensing device, conditioning and compensating circuit make up difficulty; (3) powerup issue of electric weight sensing device.These factors will cause test result to produce than mistake, also limit the electric weight sensing device is waved detection at long distance transmission line practical application.Therefore the novel sensor unit of developing in a kind of transmission line galloping on-line monitoring system just seems very urgent.
Summary of the invention
The utility model provides a kind of transmission line galloping monitoring sensing device based on fiber grating.Fiber grating has good temperature, emergent property, and the variable quantity of the side-play amount of its centre wavelength and temperature, strain has good linear relationship, and realization multiple spot that can be more convenient detects and the light wave transmissions of long distance (tens of kilometer).Fiber bragg grating sensing device does not need power supply, and anti-electromagnetic interference capability is strong; Simultaneously; Has higher sensitivity; Volume is little, in light weight; Realize characteristics such as distributed sensor array multiple spot detection more easily, can solve existing stress and temperature sensor and be subject to problems such as strong-electromagnetic field disturbs, measuring accuracy is not high, for the lead status monitoring of transmission line of electricity provides accurately, reliable monitoring technology and device.
The technical scheme that the utility model adopts is:
Shell is with two hangers are affixed as a whole up and down; The inwall left side of shell is provided with an overhanging elastic cantilever, and the free end of beam is fixed with mass, and the outer casing inner wall bottom also is provided with an overhanging elastic cantilever, and the free end of beam is fixed with mass; Respectively has an optical fiber optical grating stress sensitive element two overhanging elastic cantilever upper edge direction of extension.
What said optical fiber optical grating stress sensitive element adopted is Fiber Bragg Grating FBG stress sensitive element.
Said shell and hanger all adopt the stainless steel manufacturing.
Be processed with through hole on the said hanger.
The principal character of the utility model is the stress sensitive element that adopts based on fiber grating, realizes the detection to the moving object bidirectional acceleration.
With respect to existing electric weight acceleration sensing device, the utility model sensor device has the following advantages:
(1) scene does not need power supply, can solve open-air power supply difficult problem.
(2) anti-electromagnetic interference (EMI) is corrosion-resistant, and sensitivity is higher, has prevented the influence of the electromagnetic induction of transmission line of electricity to sensor, and because of electrical isolation, the corrosion resistance characteristic of optical fiber, is more suitable for work under complicated rugged environment.
(3) volume is little, in light weight, is easy to realize the detection signal transmission of long distance (can reach tens of kilometers), is convenient to realize that the multiple spot of distributed sensor array detects, and helps forming telemtry net and optical fiber sensing network with existing optical communication technique.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model sensor device.
Fig. 2 is the structural representation that the utility model sensor device is installed and used.
Fig. 3 is the principle schematic of the utility model.
Label among the figure:
The 1-shell, 2-optical fiber optical grating stress sensitive element, the 3-mass, the overhanging elastic cantilever of 4-, the 5-shaft tower, the 6-insulator chain, the 7-hanger, 8-bidirectional acceleration sensing device, the 9-suspension clamp, the 10-transmission line of electricity,
Embodiment
The utility model provides a kind of transmission line galloping monitoring sensing device based on fiber grating, below in conjunction with accompanying drawing and embodiment the utility model is elaborated.
The structure of a kind of embodiment of the utility model sensor device.As shown in Figure 2, shell 1 and two hangers up and down 7 be affixed to become an integral body, forms the sensing device body, adopts the stainless steel manufacturing.Be processed with through hole on the hanger 7.There is overhanging elastic cantilever 4 in the inwall left side of shell 1, and the free end of beam has mass 3, and an overhanging elastic cantilever 4 is arranged at same inwall bottom, and free end is provided with mass 3, and mass 3 fixes as one with overhanging beam 4; Two overhanging elastic cantilever 4 upper edge direction of extension, respectively with optical fiber optical grating stress sensitive element 2.Optical fiber optical grating stress sensitive element 2 required wideband light source, wavelength shift amounts detect and data acquisition, and the fiber grating detection system of being engaged in standing by electric substation that is placed on Power Supplies Condition or line provides, and realizes the transmission of long distance through optical fiber.
The course of work of the utility model sensor device is:
Bidirectional acceleration sensing device 8 is connected with insulator chain 6, and is installed on the shaft tower 5; Sensing device 8 is connected with the suspension clamp that is fixed in lead 10 9 simultaneously.
When direction was waved, bidirectional acceleration sensor 8 produced motion thereupon, under the effect of inertial force with vertically (corresponding X and Z) along level when lead 10; The flexural deformation that mass 3 produces overhanging elastic cantilever 4; The fiber grating sensitive element 2 that causes being attached on the overhanging elastic cantilever 4 produces strain, thereby the centre wavelength that causes fiber grating squints thereupon, through measuring this wavelength shift amount; Can know that corresponding inertial load changes, and then realize the measurement of X and Z directional acceleration.
Wave the result of study of mechanism according to transmission pressure, circuit is waved state can judge the generation and the influence degree thereof of waving through physical quantitys such as the acceleration of circuit, strain, displacement are detected.The utility model as measurand, is arranged acceleration sensing device based on fiber grating at transmission line of electricity with the acceleration of circuit and strain, will be owing to waving the sensitive components strain that load that acceleration produces causes; Convert the center wavelength shift amount of fiber grating into; And this wavelength shift amount and acting force are the linear ratio relation, through detection and analysis, and calculate corresponding used load numerical value; And then acquisition produces the acceleration relation data of load, the detection that realization is waved circuit.
Claims (4)
1. based on the transmission line galloping monitoring sensing device of fiber grating, it is characterized in that shell (1) is with two hangers (7) are affixed as a whole up and down; The inwall left side of shell (1) is provided with an overhanging elastic cantilever, and the free end of beam is fixed with mass, and shell (1) inwall bottom also is provided with an overhanging elastic cantilever, and the free end of beam is fixed with mass; Respectively has an optical fiber optical grating stress sensitive element two overhanging elastic cantilever upper edge direction of extension.
2. the transmission line galloping monitoring sensing device based on fiber grating according to claim 1 is characterized in that what said optical fiber optical grating stress sensitive element adopted is Fiber Bragg Grating FBG stress sensitive element.
3. the transmission line galloping monitoring sensing device based on fiber grating according to claim 1 is characterized in that said shell (1) all adopts the stainless steel manufacturing with hanger (7).
4. the transmission line galloping monitoring sensing device based on fiber grating according to claim 1 is characterized in that said hanger is processed with through hole on (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200351387U CN202230101U (en) | 2011-02-09 | 2011-02-09 | Fiber grating based power transmission line swaying monitoring sensing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200351387U CN202230101U (en) | 2011-02-09 | 2011-02-09 | Fiber grating based power transmission line swaying monitoring sensing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202230101U true CN202230101U (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200351387U Expired - Fee Related CN202230101U (en) | 2011-02-09 | 2011-02-09 | Fiber grating based power transmission line swaying monitoring sensing apparatus |
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| CN (1) | CN202230101U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848854A (en) * | 2015-05-22 | 2015-08-19 | 国网河南省电力公司电力科学研究院 | Power transmission line waving track measuring method based on light curtain sensor |
| CN114526807A (en) * | 2022-02-14 | 2022-05-24 | 中国电力科学研究院有限公司 | Dynamic monitoring device and monitoring method for breeze vibration of overhead conductor |
-
2011
- 2011-02-09 CN CN2011200351387U patent/CN202230101U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848854A (en) * | 2015-05-22 | 2015-08-19 | 国网河南省电力公司电力科学研究院 | Power transmission line waving track measuring method based on light curtain sensor |
| CN104848854B (en) * | 2015-05-22 | 2017-11-28 | 国网河南省电力公司电力科学研究院 | Transmission line galloping trajectory measurement method based on picking sensor |
| CN114526807A (en) * | 2022-02-14 | 2022-05-24 | 中国电力科学研究院有限公司 | Dynamic monitoring device and monitoring method for breeze vibration of overhead conductor |
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Legal Events
| 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: 20120523 Termination date: 20130209 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |