CN215810694U - Iron tower stress and strain monitoring rod piece - Google Patents
Iron tower stress and strain monitoring rod piece Download PDFInfo
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- CN215810694U CN215810694U CN202121557578.9U CN202121557578U CN215810694U CN 215810694 U CN215810694 U CN 215810694U CN 202121557578 U CN202121557578 U CN 202121557578U CN 215810694 U CN215810694 U CN 215810694U
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- iron tower
- rod piece
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- fiber
- strain
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 65
- 238000012544 monitoring process Methods 0.000 title claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 60
- 238000003466 welding Methods 0.000 claims description 6
- 238000007526 fusion splicing Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses an iron tower stress-strain monitoring rod piece, wherein a hollow rod body is fixedly connected with an iron tower rod piece to be detected, the axial direction of the hollow rod body is parallel to the axial direction of the iron tower rod piece to be detected, a plurality of fiber gratings are distributed on the inner wall of the hollow rod body, the fiber gratings have different central wavelengths, the fiber gratings are uniformly distributed along the axial direction of the hollow rod body, a tail fiber is connected with the fiber gratings, and the tail fiber is connected with a demodulator to couple a light source and a detector.
Description
Technical Field
The utility model relates to the technical field of power transmission monitoring, in particular to a stress-strain monitoring rod piece for an iron tower.
Background
The iron tower is an important component in a power transmission system, is a carrier for high-load electric energy transmission, and is also an important lifeline project. Various natural disasters easily cause the phenomena of crushing, pulling, twisting, tower collapse and the like of the iron tower. Once the iron tower is damaged under the action of disaster load, not only can huge economic loss be caused, but also secondary disasters such as fire disasters can be caused, and great difficulty can be caused for emergency recovery. Therefore, the method has important significance in monitoring the health state of the iron tower.
The stress condition of the key member of the iron tower can reflect the running condition of the iron tower in real time. Therefore, the key member of the iron tower is monitored on line by utilizing the advanced sensing technology, the overall health state of the iron tower can be effectively mastered, the dual purposes of state maintenance and accident prevention are realized, and the method has obvious engineering benefits, economic benefits and social benefits.
The above information disclosed in this background section is only for enhancement of understanding of the background of the utility model and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an iron tower stress-strain monitoring rod piece which is anti-electromagnetic interference, has an uncharged all-optical probe and can be used for stress measurement of a plurality of iron tower rod pieces.
In order to achieve the above purpose, the utility model provides the following technical scheme:
the utility model relates to a stress-strain monitoring rod piece for an iron tower,
a hollow rod body which is fixedly connected with an iron tower rod piece to be tested, the axial direction of the hollow rod body is parallel to the axial direction of the iron tower rod piece to be tested,
a plurality of fiber gratings distributed on the inner wall of the hollow rod body, wherein the fiber gratings have different central wavelengths and are uniformly distributed along the axial direction of the hollow rod body,
and the tail fiber is connected with the plurality of fiber gratings and is connected with the demodulator so as to couple the light source and the detector.
In the iron tower stress-strain monitoring rod piece, the hollow rod body is welded, riveted or fixed on the iron tower rod piece to be detected through the hoop.
In the iron tower stress-strain monitoring rod piece, the cross section of the hollow rod body is cylindrical, square or semicircular.
In the iron tower stress-strain monitoring rod piece, the tail fiber is formed by welding the tail fibers of the fiber gratings.
In the iron tower stress-strain monitoring rod piece, the tail fiber is welded through a welding machine.
In the iron tower stress-strain monitoring rod piece, the tail fiber extends out of the hollow rod body.
In the iron tower stress-strain monitoring rod piece, one end of the tail fiber extends out of the hollow rod body to be connected with a light source and a detector.
In the iron tower stress-strain monitoring rod piece, when the iron tower rod piece to be detected is under tension or pressure, the fiber bragg grating stretches or contracts, and the detector measures the wavelength drift of the fiber bragg grating so as to generate the stress distribution of the iron tower rod piece to be detected.
In the technical scheme, the iron tower stress-strain monitoring rod piece provided by the utility model has the following beneficial effects: the stress condition of iron tower member is monitored in real time, anti-electromagnetic interference, and simple to operate can obtain accurate stress distribution in order to carry out accurate distributed measurement to have advantages such as portable, dismantled and assembled, can carry out the stress measurement of a plurality of members.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic structural diagram of a stress-strain monitoring rod piece of an iron tower;
FIG. 2 is a schematic top view of one embodiment of a tower stress-strain monitoring rod;
FIG. 3 is a schematic top view of one embodiment of a tower stress-strain monitoring rod;
fig. 4 is a schematic top view of one embodiment of a tower stress-strain monitoring rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to fig. 1 to 4 of the drawings of the embodiments of the present invention, and it is apparent that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
In one embodiment, as shown in fig. 1 to 4, the tower stress-strain monitoring rod comprises,
a hollow rod body 1 which is fixedly connected with an iron tower rod piece to be tested,
a plurality of fiber gratings 2 distributed on the inner wall of the hollow rod body 1, the fiber gratings 2 having different central wavelengths,
and the tail fiber 3 is connected with the plurality of fiber gratings 2, and the tail fiber 3 is connected with a demodulator to couple the light source and the detector.
In the preferred embodiment of the iron tower stress-strain monitoring rod piece, when stress acts on the fiber grating, the fiber grating is mechanically elongated to generate deformation so as to change the grating period, and meanwhile, the elasto-optic effect under the action of the strain also changes the effective refractive index of the fiber core. The effective elastic-optical coefficient in silica fiber medium is about 0.22. The relationship between the shift amount of the center wavelength of the FBG reflected wave and the strain is as follows:
since the strain amount ε of an FBG is small, it is generally expressed by μ ε. If FBG with a center wavelength of 1543nm is used as the experimental material, the amount of shift of the center wavelength due to strain is about 1.2 pm/. mu.ε.
In the preferred embodiment of the iron tower stress-strain monitoring rod piece, the axial direction of the hollow rod body 1 is parallel to the axial direction of the iron tower rod piece to be detected.
In the preferred embodiment of the iron tower stress-strain monitoring rod piece, the hollow rod body 1 is welded, riveted or fixed on the iron tower rod piece to be detected through a hoop.
In a preferred embodiment of the iron tower stress-strain monitoring rod, the cross section of the hollow rod body 1 is cylindrical, square or semicircular.
In a preferred embodiment of the iron tower stress-strain monitoring rod member, the pigtails 3 are formed by fusing pigtails 3 of the plurality of fiber gratings 2.
In the preferred embodiment of the iron tower stress-strain monitoring rod piece, the tail fiber 3 is welded by a welding machine.
In a preferred embodiment of the iron tower stress-strain monitoring rod, the tail fiber 3 extends out of the hollow rod body 1.
In a preferred embodiment of the iron tower stress-strain monitoring rod piece, one end of the tail fiber 3 extends out of the hollow rod body 1 to connect a light source and a detector.
In a preferred embodiment of the iron tower stress-strain monitoring rod piece, the plurality of fiber gratings 2 are uniformly distributed along the axial direction of the hollow rod body.
In the preferred embodiment of the iron tower stress-strain monitoring rod piece, when the iron tower rod piece to be measured is under tension or pressure, the fiber grating 2 is stretched or contracted, and the detector measures the wavelength drift of the fiber grating 2 to generate the stress distribution of the iron tower rod piece to be measured.
In one embodiment, the tower stress strain monitoring rod consists of a cylindrical or square steel pipe and a plurality of fiber gratings 2 bonded on the inner side. The center wavelengths of the respective fiber gratings 2 are not uniform. The tail fibers 3 of the fiber bragg gratings 2 are welded by a welding machine, and a tail fiber 3 is reserved and can be connected with a demodulator to couple a light source and a detector. The intelligent rod piece is riveted or welded on an iron tower rod piece to be monitored, when the iron tower rod piece is under the action of tensile force or pressure, the fiber bragg grating 2 can stretch or shrink, and the quasi-distributed measurement of the stress of the iron tower rod piece is carried out by measuring the wavelength drift of the fiber bragg grating 2.
In the embodiment, the rod member is composed of a cylindrical, square or semicircular steel pipe and a plurality of fiber gratings 2 bonded at the inner side. The center wavelengths of the fiber gratings 2 are not consistent, so that quasi-distributed measurement is realized. The tail fibers 3 of the fiber gratings 2 are welded by a welding machine, and one tail fiber 3 is reserved and can be connected with a demodulator to couple a light source and a detector. The intelligent rod piece is riveted and welded or hooped to the key iron tower rod piece to be monitored by the hoop, when the iron tower rod piece is under the action of tensile force or pressure, the fiber bragg grating 2 on the intelligent rod piece can stretch or shrink, and the quasi-distributed measurement of the stress of the iron tower rod piece is carried out by measuring the drift of the wavelength of the fiber bragg grating 2.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.
Claims (8)
1. A stress-strain monitoring rod for an iron tower is characterized by comprising,
a hollow rod body which is fixedly connected with an iron tower rod piece to be tested, the axial direction of the hollow rod body is parallel to the axial direction of the iron tower rod piece to be tested,
a plurality of fiber gratings distributed on the inner wall of the hollow rod body, wherein the fiber gratings have different central wavelengths and are uniformly distributed along the axial direction of the hollow rod body,
and the tail fiber is connected with the plurality of fiber gratings and is connected with the demodulator so as to couple the light source and the detector.
2. The iron tower stress-strain monitoring rod piece as claimed in claim 1, wherein the hollow rod body is welded, riveted or fixed to the iron tower rod piece to be tested via a hoop.
3. The rod piece for monitoring stress and strain of iron tower as claimed in claim 1, wherein the cross section of the hollow rod body is cylindrical, square or semicircular.
4. The rod piece for monitoring stress and strain of iron tower as claimed in claim 1, wherein said tail fiber is formed by fusion-splicing tail fibers of said plurality of fiber gratings.
5. The tower stress-strain monitoring rod piece as claimed in claim 4, wherein the tail fiber is welded by a welding machine.
6. The rod piece for monitoring stress and strain of iron tower as claimed in claim 1, wherein the tail fiber extends out of the hollow rod body.
7. The rod piece for monitoring stress and strain of iron tower as claimed in claim 6, wherein one end of the tail fiber extends out of the hollow rod body to connect the light source and the detector.
8. The iron tower stress-strain monitoring rod piece according to claim 1, wherein when the iron tower rod piece to be tested is under tension or pressure, the fiber grating stretches or contracts, and the detector measures the wavelength drift of the fiber grating to generate the stress distribution of the iron tower rod piece to be tested.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120981626 | 2021-05-10 | ||
| CN2021209816260 | 2021-05-10 |
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| CN215810694U true CN215810694U (en) | 2022-02-11 |
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| CN202110782256.2A Pending CN113514001A (en) | 2021-05-10 | 2021-07-09 | Iron tower strain monitoring rod piece |
| CN202121557578.9U Active CN215810694U (en) | 2021-05-10 | 2021-07-09 | Iron tower stress and strain monitoring rod piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514001A (en) * | 2021-05-10 | 2021-10-19 | 上海电力大学 | Iron tower strain monitoring rod piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015080222A1 (en) * | 2013-12-01 | 2015-06-04 | 株式会社シミウス | Strain sensor and manufacturing method for strain sensor |
| CN104567707A (en) * | 2014-12-29 | 2015-04-29 | 云南电网公司电力科学研究院 | On-line monitoring system for pressed deformation of tower body structure of electric power iron tower |
| CN106840013A (en) * | 2016-12-29 | 2017-06-13 | 北京希卓信息技术有限公司 | Sliding monitoring sensor and Slope Sliding strain monitoring system |
| CN109186490A (en) * | 2018-09-21 | 2019-01-11 | 北京航空航天大学 | A kind of 3D shape sensing measuring method and device based on multi-core optical fiber |
| CN210089604U (en) * | 2019-05-23 | 2020-02-18 | 西安工程大学 | Online monitoring device for deformation of power transmission tower |
| CN110849719B (en) * | 2019-09-29 | 2022-04-05 | 上海市隧道工程轨道交通设计研究院 | Monitoring method for compression and tensile deformation of stress rod piece based on optical fiber sensing technology |
| CN110806316B (en) * | 2019-10-11 | 2021-07-13 | 中国人民解放军海军工程大学 | Fiber bragg grating sensing device for detecting stress state of water-lubricated bearing and monitoring system thereof |
| CN110726377A (en) * | 2019-11-07 | 2020-01-24 | 西安科技大学 | Four-fiber-core fiber grating sensor for measuring tunnel surface morphology |
| CN112502516A (en) * | 2020-10-27 | 2021-03-16 | 贵州黔冠鼎盛实业有限公司 | Intelligent electric pole with stress and bending moment monitoring function |
| CN113514001A (en) * | 2021-05-10 | 2021-10-19 | 上海电力大学 | Iron tower strain monitoring rod piece |
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- 2021-07-09 CN CN202110782256.2A patent/CN113514001A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514001A (en) * | 2021-05-10 | 2021-10-19 | 上海电力大学 | Iron tower strain monitoring rod piece |
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