CN112523430A - A fiber grating sensor wisdom cable for building cable structure - Google Patents
A fiber grating sensor wisdom cable for building cable structure Download PDFInfo
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- CN112523430A CN112523430A CN202011318554.8A CN202011318554A CN112523430A CN 112523430 A CN112523430 A CN 112523430A CN 202011318554 A CN202011318554 A CN 202011318554A CN 112523430 A CN112523430 A CN 112523430A
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- cable
- fiber grating
- grating sensor
- cable body
- fiber
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- 239000000835 fiber Substances 0.000 title claims abstract description 94
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 25
- 238000000576 coating method Methods 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 9
- 238000005538 encapsulation Methods 0.000 abstract description 4
- 238000012806 monitoring device Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 abstract description 2
- 230000005291 magnetic effect Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000007716 flux method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention provides a fiber grating sensor intelligent cable for a building cable structure, which comprises a cable body and a fiber grating sensor, wherein the cable body is composed of a plurality of steel wires, the fiber grating sensor is fixed in the cable body, an encapsulation structure is arranged outside the fiber grating sensor, and the encapsulation structure is a fiber composite rib. Compared with the prior art, the cable force monitoring device has the advantages that the fiber grating sensor is combined with the building cable, the change of the part of the component where the grating is located is sensed by the grating, the change of the optical signal is transmitted to the fiber grating collector through the optical fiber, the cable force is rapidly, accurately and intuitively monitored in real time, and the cable force monitoring device is suitable for long-term monitoring of the building structure.
Description
Technical Field
The invention relates to a fiber grating sensor intelligent cable for a building cable structure. The building cable structure belongs to a tension structure, a stable structural form is formed after prestress tensioning forming, a cable body of the cable structure is always in a prestress tensioning state during construction and use, and how can the cable force change condition and the stress condition of the cable body be accurately monitored in real time? The invention can accurately measure the distribution situation of the cable force in the cable body in real time, provides reliable data support for the cable force distribution and the internal force change of the building cable structure, and provides reliable basis for knowing and mastering the health condition of the structure.
Background
At present, a plurality of common methods for monitoring the building cable structure are provided, mainly including a pressure sensor method, an oil pressure meter reading method, a magnetic flux method, a frequency measurement method and the like, and the magnetic flux method is mainly widely applied to the building cable structure at present. The magnetic flux method is used for measuring the cable force, when the ferromagnetic material of the magnetic flux sensor bears external load and changes, the internal magnetic conductivity changes, the cable force is measured at intervals by measuring the change relation between the magnetic conductivity of the ferromagnetic material member and the cable force, and meanwhile, a magnetic flux sensor needs to be added on a cable body to acquire data.
Disclosure of Invention
The invention provides a fiber grating sensor intelligent cable for a building cable structure, which is used for realizing the rapid and accurate detection of the building cable force.
The invention provides a fiber grating sensor intelligent cable for a building cable structure, which comprises a cable body and a fiber grating sensor, wherein the cable body is composed of a plurality of steel wires, the fiber grating sensor is fixed in the cable body, an encapsulation structure is arranged outside the fiber grating sensor, and the encapsulation structure is a fiber composite rib.
Furthermore, the fiber composite rib is a fiber reinforced plastic-fiber grating composite sensing rib.
Furthermore, the cable body comprises a central cable body and an outer ring cable body, and the outer ring cable body is sleeved outside the central cable body.
Furthermore, the central cable body is formed by twisting a plurality of round steel wires, and the fiber bragg grating sensor is positioned in the central cable body.
Furthermore, the outer ring cable body is formed by twisting a plurality of Z-shaped steel wires and/or round steel wires.
Further, the fiber grating sensor is coated with high-temperature resistant coatings on the surfaces of two ends of the cable body.
Furthermore, both ends of the fiber grating sensor are provided with reserved fiber grating sections, the reserved fiber grating sections are located outside the cable body, and the reserved fiber grating sections are not smaller than 1 meter.
Furthermore, the fiber composite rib is inserted into the central cable body and is bonded with the central cable body.
Furthermore, the central cable body is provided with a central wire, the central wire is an intelligent composite rib, and the fiber grating sensor is installed in the intelligent composite rib.
Furthermore, the fiber reinforced plastic-fiber grating composite sensing rib is composed of one or more of carbon fiber and glass fiber.
Compared with the prior art, the cable force monitoring device has the advantages that the fiber grating sensor is combined with the building cable, the change of the part of the component where the grating is located is sensed by the grating, the change of the optical signal is transmitted to the fiber grating collector through the optical fiber, the cable force is rapidly, accurately and intuitively monitored in real time, and the cable force monitoring device is suitable for long-term monitoring of the building structure.
Drawings
FIG. 1 is a cross-sectional view of a seal cable according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a high vanadium cable in accordance with an embodiment of the present invention;
FIG. 3 is a side view of an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a sealing cable with a smart composite rib as a core wire in an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The embodiment of the invention discloses a fiber grating sensor smart cable for a building cable structure, which comprises a cable body 1 and a fiber grating sensor 2, wherein the cable body 1 is composed of a plurality of steel wires, the fiber grating sensor 2 is fixed in the cable body 1, a packaging structure is arranged outside the fiber grating sensor 2, and the packaging structure is a fiber composite rib.
Optionally, the fiber composite rib is a fiber reinforced plastic-fiber grating composite sensing rib.
As shown in fig. 1 and 2, in the fiber grating sensor smart cable according to the embodiment of the present invention, the fiber grating sensor 2 is implanted into the cable body 1 when the cable body 1 is twisted.
The embodiment of the invention obtains the cable tension by using the intelligent cable of the fiber grating sensor, and the fiber reinforced plastic-fiber grating composite sensing rib with the mechanical property similar to that of steel is selected, so that the fiber grating sensor can extend along with the stretching of the steel, the wavelength drift is realized, and the cable tension is conveniently monitored. Meanwhile, the intelligent cable provided by the embodiment of the invention has the same appearance as a common cable, is convenient to install and easy to detect, and can provide cable force change data of the cable structure in the whole process from construction to use on the premise of ensuring the safety of the building cable structure, so that the health condition of the building structure is accurately monitored in real time.
Optionally, as shown in fig. 1 and 2, the cable body 1 includes a central cable body 11 and an outer ring cable body 12, and the outer ring cable body 12 is sleeved outside the central cable body 11.
Specifically, as shown in fig. 1 and 2, the central cable body 11 is formed by twisting a plurality of round steel wires, and the fiber grating sensor 2 is located in the central cable body 11.
The central cable body 11 is formed by a plurality of steel wires surrounding a central wire 111.
Specifically, as shown in fig. 1 and 2, the outer ring cable 12 is formed by twisting a plurality of Z-shaped steel wires 121 and/or round steel wires.
As shown in fig. 1, the cable body using the Z-shaped steel wire 121 is a sealed cable body, a high-quality sealed steel wire cable body is used, the inner layer of the cable body is a round steel wire, and the outer layer is a Z-shaped steel wire. The diameter of the cable body is less than 60mm, and the number of the outer layer Z-shaped steel wires 121 is not less than 2; the diameter of the cable body is more than or equal to 60mm, and the number of the outer layer Z-shaped steel wires 121 is not less than 3. The nominal tensile strength of the steel wire can adopt three grades of 1570MPa, 1670MPa and 1770MPa, and the elastic modulus is (1.6 +/-0.05) multiplied by 105 MPa.
As shown in figure 2, the high vanadium cable body with the circular steel wire as the outer ring cable body adopts GALFAN (zinc-5% aluminum-mixed rare earth alloy) coating on the surface of the steel wire, the nominal tensile strength of the steel wire can adopt three grades of 1570MPa, 1670MPa and 1770MPa, and the elastic modulus is (1.6 +/-0.05) multiplied by 105Mpa。
Optionally, the fiber grating sensor 2 is coated with a high temperature resistant coating on the surface at the two ends of the cable body 1.
According to the embodiment of the invention, the high-temperature resistant coating is adopted, so that the high-temperature resistance of the fiber grating sensor is improved, after the cable body is formed, the two ends of the cable body can be poured through the hot cast anchor to form the cable anchor head, and the use safety and stability of the cable body are improved.
Optionally, as shown in fig. 3, two ends of the fiber grating sensor 2 are provided with reserved fiber grating sections 21, the reserved fiber grating sections 21 are located outside the cable body 1, and the reserved fiber grating sections 21 are not smaller than 1 meter.
According to the embodiment of the invention, the reserved fiber bragg grating sections are arranged at the two ends of the cable body, so that the cable body can be connected with the fiber bragg grating data transmission interface in the next step, and after the fiber bragg grating at one end of the cable body has a data transmission problem, the cable body can be subjected to data transmission with the other end, so that the success rate of the data transmission of the cable body is ensured.
In particular, the fiber composite rib is inserted into the central cable body 111, or replaces the central wire.
The composite grating sensing rib is made of a material with the strength similar to that of the steel wire, and is fixed with the central wire 111 of the cable body 1 by glue.
Specifically, as shown in fig. 4, the center of the central cable body 11 is an intelligent composite rib, and the fiber grating sensor 2 is installed in the intelligent composite rib.
Wherein, center wire 111 is the compound muscle structure of intelligence, and fiber grating sensor 2 is located the compound muscle of intelligence or directly replaces central steel wire, and the material intensity of the compound muscle of intelligence is close with the steel wire, can effectively protect fiber grating sensor 2, avoids fiber grating sensor 2 to receive a large amount of extrudions and damage in twisting with fingers system and the use, prolongs fiber grating sensor 2's life.
Optionally, the fiber reinforced plastic-fiber grating composite sensing rib is composed of one or more of carbon fiber and glass fiber.
The fiber reinforced plastic of the embodiment of the invention is a composite material composed of continuous carbon fibers, glass fibers and the like, and the main component of the fiber grating is SiO2。
In the embodiment of the invention, a phi 65 sealing cable body is taken as an example, a pulling test is carried out, and the results are shown in the following table:
as shown in the above table, the human breaking force 4220KN of the sealed cable body is gradually loaded to 60% of the breaking force (about 2500KN) by using a force of about 500KN in the test, and it can be seen that the test result of the fiber grating sensor is close to the actual tensile force (reading of the tester), the relative error is less than 4%, especially under a high load, the relative error is less than 1%, and the cable force change of the cable body can be effectively monitored. Meanwhile, the fiber grating sensor provided by the embodiment of the invention has good contractibility, and after the sealing cable body is loaded to 60% of the breaking force, the test result of the fiber grating sensor is reduced along with the reduction of the tensile force, and meanwhile, the relative error is kept to be less than 4%.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.
Claims (10)
1. The utility model provides a fiber grating sensor wisdom cable for building cable structure, a serial communication port, fiber grating sensor wisdom cable is including the cable body, fiber grating sensor, the cable body comprises a plurality of steel wire, the fiber grating sensor is fixed at the internal of cable, the fiber grating sensor is equipped with packaging structure outward, packaging structure is the compound muscle of fibre.
2. The fiber grating sensor smart cable of claim 1, wherein the fiber composite rib is a fiber reinforced plastic-fiber grating composite sensor rib.
3. The fiber grating sensor smart cable of claim 1, wherein the cable body comprises a central cable body and an outer ring cable body, and the outer ring cable body is sleeved outside the central cable body.
4. The fiber grating sensor smart cable of claim 3, wherein the central cable body is formed by twisting a plurality of round steel wires, and the fiber grating sensor is located in the central cable body.
5. The FBG sensor smart cable as claimed in claim 4, wherein the outer ring cable body is twisted from a plurality of Z-shaped steel wires and/or round steel wires.
6. The fiber grating sensor smart cable for building cable structures as claimed in claim 1, wherein the fiber grating sensor is surface coated with a high temperature resistant coating at both ends of the cable body.
7. The fiber grating sensor smart cable for building cable structures as claimed in claim 1, wherein the fiber grating sensor has reserved fiber grating sections at two ends, the reserved fiber grating sections are located outside the cable body, and the reserved fiber grating sections are not less than 1 meter.
8. The fiber grating sensor smart cable of claim 3, wherein the fiber composite rib is inserted into the central cable body and bonded to the central cable body.
9. The fiber grating sensor smart cable for building cable structure as claimed in claim 3, wherein the central cable body has a central filament, the central filament is an intelligent composite rib, and the fiber grating sensor is installed in the intelligent composite rib.
10. The fiber grating sensor smart cable of claim 1, wherein the fiber reinforced plastic-fiber grating composite sensor rib is made of one or more of carbon fiber and glass fiber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020109733658 | 2020-09-16 | ||
| CN202010973365 | 2020-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112523430A true CN112523430A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011318554.8A Pending CN112523430A (en) | 2020-09-16 | 2020-11-23 | A fiber grating sensor wisdom cable for building cable structure |
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| Country | Link |
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| CN (1) | CN112523430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061802A (en) * | 2021-11-19 | 2022-02-18 | 北京市建筑工程研究院有限责任公司 | Fiber grating clamp cable dynamometer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716316Y (en) * | 2004-04-13 | 2005-08-10 | 柳州欧维姆机械股份有限公司 | Anchor cable with sensing optical fibers |
| CN200992682Y (en) * | 2006-12-29 | 2007-12-19 | 柳州欧维姆机械股份有限公司 | Cold-cast pier anchor cable implanting optical fiber grating reinforced smart bars |
| CN101806037A (en) * | 2010-03-30 | 2010-08-18 | 东南大学 | Composite inhaul cable with totally-closed carbon fiber wires and high-strength steel wire |
| US20110243185A1 (en) * | 2009-09-30 | 2011-10-06 | Fasten Group Company, Ltd. | Bridge Intelligent Cable System with Built-In Fiber Grating Sensor |
| CN204354493U (en) * | 2014-12-12 | 2015-05-27 | 东南大学 | Fiber-reinforced composite muscle smart grid |
| CN110468686A (en) * | 2019-09-02 | 2019-11-19 | 广东迈诺工业技术有限公司 | A kind of bridge antivibration drag-line |
-
2020
- 2020-11-23 CN CN202011318554.8A patent/CN112523430A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716316Y (en) * | 2004-04-13 | 2005-08-10 | 柳州欧维姆机械股份有限公司 | Anchor cable with sensing optical fibers |
| CN200992682Y (en) * | 2006-12-29 | 2007-12-19 | 柳州欧维姆机械股份有限公司 | Cold-cast pier anchor cable implanting optical fiber grating reinforced smart bars |
| US20110243185A1 (en) * | 2009-09-30 | 2011-10-06 | Fasten Group Company, Ltd. | Bridge Intelligent Cable System with Built-In Fiber Grating Sensor |
| DK2484834T3 (en) * | 2009-09-30 | 2017-04-18 | Fasten Group Company Ltd | INTELLIGENT CABLE BRIDGE SYSTEM WITH INTEGRATED FIBERGITTER SENSOR |
| CN101806037A (en) * | 2010-03-30 | 2010-08-18 | 东南大学 | Composite inhaul cable with totally-closed carbon fiber wires and high-strength steel wire |
| CN204354493U (en) * | 2014-12-12 | 2015-05-27 | 东南大学 | Fiber-reinforced composite muscle smart grid |
| CN110468686A (en) * | 2019-09-02 | 2019-11-19 | 广东迈诺工业技术有限公司 | A kind of bridge antivibration drag-line |
Non-Patent Citations (2)
| Title |
|---|
| 同济大学等: "《建筑索结构技术标准》", 31 May 2019, 同济大学出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061802A (en) * | 2021-11-19 | 2022-02-18 | 北京市建筑工程研究院有限责任公司 | Fiber grating clamp cable dynamometer |
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