CN117738386A - Fiber bragg grating intelligent steel strand and prestress structure member for building - Google Patents
Fiber bragg grating intelligent steel strand and prestress structure member for building Download PDFInfo
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- CN117738386A CN117738386A CN202410180863.5A CN202410180863A CN117738386A CN 117738386 A CN117738386 A CN 117738386A CN 202410180863 A CN202410180863 A CN 202410180863A CN 117738386 A CN117738386 A CN 117738386A
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- grating
- temperature compensation
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- guide tube
- buffer
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 62
- 239000010959 steel Substances 0.000 title claims abstract description 62
- 239000000835 fiber Substances 0.000 title claims abstract description 33
- 239000013307 optical fiber Substances 0.000 claims abstract description 44
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 239000004519 grease Substances 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 11
- 238000005452 bending Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 210000003518 stress fiber Anatomy 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
The application relates to the technical field of building structural members, in particular to an intelligent fiber bragg grating steel strand and a prestress structural member for a building. On one hand, the application relates to an intelligent fiber bragg grating steel strand, which comprises a central composite rib and an optical fiber; the optical fiber is provided with a strain grating and a temperature compensation grating; the buffer assembly comprises a guide tube and a buffer plate; the temperature compensation grating is positioned in the guide tube; the buffer plate and the temperature compensation grating are relatively fixed, and a gap is reserved between the periphery of the buffer plate and the inner wall of the guide tube; the guide tube is internally filled with buffer grease. On the other hand, the application relates to a prestress structure component for building, including concrete structure and fiber bragg grating intelligence steel strand wires, fiber bragg grating intelligence steel strand wires set up inside the concrete structure. The application provides a fiber bragg grating intelligence steel strand wires and prestressing force structural member for building can effectively solve the relatively poor problem of temperature compensation precision because of vibrations cause when prestressing force tensioning.
Description
Technical Field
The application relates to the technical field of building structural members, in particular to an intelligent fiber bragg grating steel strand and a prestress structural member for a building.
Background
Prestressed structural members, such as prestressed beams, have been widely used in various kinds of medium-to-large buildings, such as bridges, high-rise buildings, tunnels, etc. The prestress structural member is usually prestressed and tensioned, so that the strength and stability of the structural member are effectively improved.
To achieve prestress tensioning of the structural member, it is necessary to provide steel strands inside the structural member, and to apply tension to the steel strands by using a hydraulic jack. In the prestress tensioning process of the steel strand, the prestress needs to be detected in order to ensure a reasonable range of the prestress. In the related art, a strain grating is integrated in a steel strand. And detecting the stress in the steel strand through the strain grating.
However, since the strain grating is affected by temperature, in order to improve the accuracy of the stress fiber grating, a temperature sensor is usually additionally arranged to detect the internal temperature of the steel strand, so as to facilitate temperature compensation during subsequent stress calculation.
In order to further improve the accuracy of temperature compensation, in the related art, a temperature compensation grating is additionally disposed on the optical fiber where the strain grating is located, that is, the temperature compensation grating and the strain grating are integrated on the same optical fiber, so that the temperature around the temperature compensation grating is similar to the temperature around the strain grating, thereby improving the accuracy of temperature compensation.
However, in practical application of the steel strand, when the steel strand is prestressed and tensioned, because the tension of the hydraulic jack has certain fluctuation, the tension wave acts on the steel strand, so that the steel strand vibrates, the vibration acts on the temperature compensation grating, the temperature compensation grating vibrates, and when the temperature compensation grating vibrates, the internal optical signal correspondingly fluctuates, so that the temperature compensation precision is affected.
Disclosure of Invention
The application provides an optical fiber grating intelligent steel strand and a prestress structure component for building, which can effectively solve the problem of poor temperature compensation precision caused by vibration during prestress tensioning, thereby improving the precision of prestress tensioning and enabling the prestress structure component to have better performance.
In a first aspect, the present application provides an intelligent fiber bragg grating steel strand, which adopts the following technical scheme:
an intelligent fiber grating steel strand comprises a central composite rib and an optical fiber; the optical fiber is arranged in the central composite rib, and a strain grating and a temperature compensation grating are arranged on the optical fiber;
the buffer assembly is also included; the buffer component comprises a guide tube arranged in the central composite rib and a buffer plate arranged in the guide tube; the optical fiber passes through the guide tube and the temperature compensation grating is positioned in the guide tube;
the buffer plate is provided with a fixing hole for the temperature compensation grating to pass through, and the buffer plate and the temperature compensation grating are relatively fixed; the diameter of the buffer plate is larger than that of the temperature compensation grating, and a gap is reserved between the periphery of the buffer plate and the inner wall of the guide tube;
the guide tube is internally filled with buffer grease, and two ends of the guide tube are sealed.
Through adopting above-mentioned technical scheme, when temperature compensation grating shakes, buffering grease can play the cushioning effect, can absorb the vibrations transmission of steel strand wires to reduce temperature compensation grating's vibrations, promote the accuracy of data. When the temperature compensation grating and the guide tube are displaced relatively, the buffer plate can provide damping effect, so that severe displacement of the temperature compensation grating is avoided, and vibration is avoided. In addition, the buffer plate can enable the temperature compensation grating to be located at the center of the guide tube as far as possible, so that when the steel stranded wires are bent and deformed, external force action is not easily applied to the temperature compensation grating.
Therefore, the fiber bragg grating intelligent steel strand can better solve the problem that vibration occurs due to the fact that the temperature compensation grating is subjected to external force, further solves the problem of temperature compensation grating data fluctuation, and ensures that the internal stress of a concrete member is accurately monitored when the prestress tensioning is carried out.
Preferably, the buffer plates are provided with two buffer plates and are respectively positioned at two ends of the temperature compensation grating, the buffer plates are fixedly connected with the optical fibers, and the temperature compensation grating is positioned between the two buffer plates.
Through adopting above-mentioned technical scheme, two buffer boards all with optic fibre fixed connection, can more play the guard action to temperature compensation grating when two buffer boards synchronous motion.
Preferably, a connecting rod is further arranged between the two buffer plates, and two ends of the connecting rod are fixedly connected with the two buffer plates respectively; the buffer plate and the connecting rod form a protection frame, and the temperature compensation grating is positioned on the inner side of the protection frame.
Through adopting above-mentioned technical scheme, protection frame's setting, when optic fibre received axial tensile force effect on the one hand, because buffer board and optic fibre fixed connection, consequently the pulling force can be conducted through protection frame, can not directly act on above the temperature compensation grating, guarantees that temperature compensation grating is difficult for taking place deformation. On the other hand, when the steel strand wires take place bending deformation, the power that deformation produced can act on the protection frame, can not directly apply on temperature compensation grating, guarantees equally that temperature compensation grating is difficult for taking place deformation to reduce the influence of external force to temperature compensation grating, thereby guarantee temperature detection precision of temperature compensation grating.
Preferably, the guide tube and the strain grating are both positioned on the central axis of the central composite bar.
By adopting the technical scheme, the positions of the guide pipe and the strain grating are corresponding, so that the position of the temperature compensation grating in the steel stranded wire is close to the position of the strain grating, and the centering effect of the buffer plate on the temperature compensation grating is matched, so that the surrounding temperature of the temperature compensation grating is ensured to be similar to the surrounding temperature of the strain grating, and the temperature compensation precision is improved.
Preferably, both ends of the guide tube are provided with sealing plates, and the sealing plates are provided with through holes; the through hole is internally provided with a protective sleeve, and the optical fiber passes through the protective sleeve and is fixedly connected with the protective sleeve.
By adopting the technical scheme, the protection sleeve can protect the optical fiber, so that the optical fiber is not easy to be damaged due to extrusion of the guide tube.
Preferably, the protective sleeve comprises a hard portion and a flexible portion; the hard part is in sliding fit with the through hole; the flexible part is positioned inside the guide tube and fixedly connected with the buffer plate.
Through adopting above-mentioned technical scheme, the setting of stereoplasm part can guarantee the normal slip of optic fibre, and the flexible part can play the enhancement effect to the optic fibre near the temperature compensation grating, also can make optic fibre keep certain flexibility to play the maintenance effect to temperature compensation grating position, make temperature compensation grating be difficult for taking place violent displacement.
In a second aspect, the present application provides a prestressed structural component for construction, which adopts the following technical scheme:
the prestress structural member for the building comprises a concrete structure and an intelligent fiber grating steel strand, wherein the intelligent fiber grating steel strand is arranged inside the concrete structure.
By adopting the technical scheme, when the fiber bragg grating intelligent steel strand is prestressed and tensioned, the internal stress of the fiber bragg grating intelligent steel strand can be accurately detected, so that the prestress and tensioning effect of the concrete structure is ensured, and the structural performance of the concrete structure is improved.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. the buffer component can play a role in buffering vibration conduction between the steel strand and the temperature compensation grating when the steel strand vibrates, so that vibration of the temperature compensation grating is reduced; when the temperature compensation grating and the guide tube are subjected to relative displacement, the buffer plate can also provide a damping effect, so that severe displacement of the temperature compensation grating is avoided, and the accuracy of data is improved due to vibration.
2. The setting of protection frame, on the one hand when optic fibre receives axial tensile force effect, because buffer board and optic fibre fixed connection, consequently the pulling force can be conducted through protection frame, can not directly act on above the temperature compensation grating, guarantees that temperature compensation grating is difficult for taking place deformation. On the other hand, when the steel strand wires take place bending deformation, the power that deformation produced can act on the protection frame, can not directly apply on the temperature compensation grating, guarantees equally that temperature compensation grating is difficult for taking place deformation to reduce the influence of external force to the temperature compensation grating.
3. The hard part of the protective sleeve can ensure the normal sliding of the optical fiber, and the flexible part can strengthen the optical fiber near the temperature compensation grating, and can also keep the optical fiber with certain flexibility, thereby playing a role in keeping the position of the temperature compensation grating, and ensuring that the temperature compensation grating is not easy to generate severe displacement.
4. The prestress structural member can be applied to various bridges, buildings and other buildings, and has a wide application range.
Drawings
FIG. 1 is a cross-sectional view of a steel strand according to example 1 of the present application;
FIG. 2 is a schematic view of the structure of a buffer assembly in embodiment 1 of the present application;
FIG. 3 is a schematic structural view of the prestress structural member for construction in example 2 of the present application;
the reference numerals in the drawings: 1. a central composite rib; 2. a steel wire; 3. an optical fiber; 4. a temperature compensated grating; 5. a strain grating; 6. a buffer assembly; 61. a guide tube; 62. a sealing plate; 63. a protective sleeve; 631. a hard portion; 632. a flexible portion; 64. a buffer plate; 65. a connecting rod; 7. a concrete structure.
Detailed Description
The invention is described in further detail below with reference to fig. 1-3.
Example 1
The embodiment of the application discloses a prestress structural member for building. Referring to fig. 1 and 2, the steel strand includes a central composite bead 1, a steel wire 2 coated outside the central composite bead 1, and an optical fiber 3 disposed inside the central composite bead 1. The central composite rib 1 is made of FRP material. The optical fibers 3 are arranged along the length direction of the central composite rib 1. The optical fiber 3 is provided with a strain grating 5 and a temperature compensation grating 4. The temperature compensation grating 4 and the strain grating 5 are both inscribed on the optical fiber 3 and are arranged at intervals.
The strain grating 5 can detect the stress of the steel strand, and the temperature compensation grating 4 can detect the internal temperature of the steel strand, so that the strain grating 5 can be subjected to temperature compensation, and the accuracy of the strain grating 5 is improved.
And because the temperature compensation grating 4 and the strain grating 5 are positioned on the same optical fiber 3 and both are positioned in the center composite rib 1, the temperature around the temperature compensation grating 4 is similar to the temperature around the strain grating, and therefore the temperature compensation of the strain grating 5 by the temperature compensation grating 4 can be more accurate.
A cushioning assembly 6 is also included. The damper assembly 6 includes a guide tube 61. The guide pipe 61 is provided inside the center composite bead 1 and is fixed relatively to the center composite bead 1. The guide tube 61 and the strain grating 5 are both located on the central axis of the central composite rib 1, i.e. when the central composite rib 1 is in a straight state, the guide tube 61 is coaxial with the optical fiber 3 and the strain grating 5. The optical fiber 3 passes through the guide tube 61, and the temperature compensating grating 4 is located inside the guide tube 61.
The guide tube 61 and the central composite rib 1 are coaxially arranged, so that the temperature environment inside the guide tube 61 is similar to the temperature environment inside the strain grating 5, and the temperature compensation grating 4 can perform temperature compensation on the strain grating 5 only by detecting the temperature inside the guide tube 61.
In the embodiment of the application, the guide tube 61 can bear the action of external forces such as bending deformation of the steel strand, so that the temperature compensation grating 4 can be well protected. The guide tube 61 is preferably made of a hard material, such as plastic, metal, or the like.
Sealing plates 62 are arranged at two ends of the guide tube 61, through holes are formed in the sealing plates 62, and a protective sleeve 63 is slidably matched in the through holes. An oil seal is provided between the sealing plate 62 and the protection sleeve 63 to seal a gap therebetween. The optical fiber 3 is arranged in the protective sleeve 63 in a penetrating way and is fixedly connected with the protective sleeve 63.
The protective sleeve 63 includes a hard portion 631 and a flexible portion 632, and the hard portion 631 may be made of a material having a high bearing capacity, such as plastic, composite fiber, or metal. While the flexible portion 632 is made of a material with better flexibility, such as rubber, silica gel, etc. The hard portion 631 is slidably engaged with the through hole, and on the one hand, protects the optical fiber 3 from being damaged by bending or being extruded by external force, and on the other hand, the hard portion 631 can ensure normal sliding of the optical fiber 3 and prevent the optical fiber 3 from being extruded by the sealing plate 62 or the guide tube 61. The flexible portion 632 can strengthen the optical fiber 3 near the temperature compensation grating 4, and can maintain a certain flexibility of the optical fiber 3, so as to not only play a role of buffering and damping, but also prevent the optical fiber 3 from excessively deforming or shaking.
The buffer assembly 6 further includes buffer plates 64, and the buffer plates 64 are provided in two and located at both ends of the temperature compensation grating 4, respectively. The buffer plate 64 has a mounting hole at the center thereof, through which the optical fiber 3 passes and is fixedly connected to the buffer plate 64.
The buffer plate 64 also has a better compression resistance and can protect the temperature compensation grating 4. In addition, the buffer plate 64 is arranged to ensure that the temperature compensating grating 4 is always positioned near the center of the guide tube 61 without generating large offset.
A gap is reserved between the periphery of the buffer plate 64 and the inner wall of the guide tube 61, so that a deformation allowance is reserved for the guide tube 61, and the guide tube 61 is ensured not to squeeze the temperature compensation grating 4 when bending deformation occurs along with the whole steel strand.
A plurality of connecting rods 65 are arranged between the two buffer plates 64, two ends of each connecting rod 65 are fixedly connected with the two buffer plates 64 respectively, and the plurality of connecting rods 65 are arranged around the temperature compensation grating 4. The connecting rod 65 and the buffer plate 64 thus constitute a protective frame, inside which the temperature compensating grating 4 is located.
Since the steel wire 2 and the central composite rib 1 are subjected to tensile force during prestress tensioning, the lengths thereof are elongated, so that relative displacement exists between the central composite rib 1 and the optical fiber 3, and frictional force between the central composite rib 1 and the optical fiber 3 acts on the optical fiber 3, which is equivalent to that of the optical fiber 3.
Therefore, when the optical fiber 3 receives a tensile force, the buffer plate 64 is fixedly connected with the optical fiber 3, so that the tensile force is conducted through the protection frame and is not directly acted on the temperature compensation grating 4, and the temperature compensation grating 4 is not easy to deform in tension. In addition, when the steel stranded wires are bent and deformed, force generated by deformation can act on the protection frame and cannot be directly applied to the temperature compensation grating 4, deformation of the temperature compensation grating 4 is not easy to occur, and accordingly the influence of external force on the temperature compensation grating 4 is reduced.
Because during prestress tensioning, the steel strand can be influenced by factors such as internal oil pressure fluctuation of the hydraulic jack, wiring arrangement conditions of the steel strand in the concrete member, poor straightness of the steel strand and the like, the steel strand is easy to vibrate, the vibration can be transmitted to the temperature compensation grating 4, so that data fluctuation of the temperature compensation grating 4 is caused, the accuracy of stress monitoring is influenced, and therefore, buffer grease is filled in the guide tube 61 in order to reduce the influence of the steel strand vibration on the temperature compensation grating 4.
The buffer grease adopts high-viscosity grease, namely, the buffer grease is guaranteed to have better buffer performance on the temperature compensation grating 4, so that the interference of external vibration on the temperature compensation grating 4 is reduced.
In addition, the lengths of the steel wire 2 and the central composite rib 1 are increased in the prestress tensioning process of the steel strand, and the guide pipe 61 is fixedly connected with the central composite rib 1, so that the phenomenon that the temperature compensation grating 4 and the guide pipe 61 are relatively displaced is generated, and on the other hand, when the internal oil pressure of the hydraulic jack fluctuates, the phenomenon that the temperature compensation grating 4 is instantaneously moved is also generated. In the prestress tensioning process, the buffer grease and the buffer plate 64 cooperate, the buffer grease can flow through the gap between the buffer plate 64 and the guide tube 61, and the buffer plate 64 has a damping effect, so that the temperature compensation grating 4 is prevented from violently displacing to cause vibration.
The implementation principle of the prestress structural member for building in the embodiment of the application is as follows: the temperature compensation grating 4 can move in the guide tube 61 and can move along the circumferential direction of the guide tube 61 and also can move along the radial direction of the guide tube 61, so that when the steel strand is subjected to bending stress and tensioning stress, the temperature compensation grating 4 is not easy to be interfered by external force, and the internal temperature of the steel strand is accurately detected, so that the temperature compensation precision of the strain grating 5 is improved.
Example 2
The embodiment of the application discloses a prestressing force structural member for building, refer to fig. 3, and prestressing force structural member for building includes concrete structure 7 and sets up at the inside steel strand wires of concrete structure 7, and concrete structure 7 can be the concrete beam, also can be structural members such as concrete column.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (7)
1. An intelligent fiber grating steel strand comprises a central composite rib (1) and an optical fiber (3); the optical fiber (3) is arranged in the central composite rib (1), and the optical fiber (3) is provided with a strain grating (5) and a temperature compensation grating (4); the method is characterized in that:
also comprises a buffer assembly (6); the buffer assembly (6) comprises a guide tube (61) arranged inside the central composite rib (1) and a buffer plate (64) arranged inside the guide tube (61); the optical fiber (3) passes through a guide tube (61) and the temperature compensation grating (4) is positioned in the guide tube (61);
the buffer plate (64) is provided with a fixing hole for the temperature compensation grating (4) to pass through, and the buffer plate (64) and the temperature compensation grating (4) are relatively fixed; the diameter of the buffer plate (64) is larger than that of the temperature compensation grating (4), and a gap is reserved between the periphery of the buffer plate (64) and the inner wall of the guide tube (61);
the guide tube (61) is internally filled with buffer grease, and two ends of the guide tube (61) are both arranged in a sealing mode.
2. The fiber bragg grating intelligent steel strand as claimed in claim 1, wherein: the buffer plates (64) are arranged at two ends of the temperature compensation grating (4) respectively, the buffer plates (64) are fixedly connected with the optical fibers (3), and the temperature compensation grating (4) is arranged between the two buffer plates (64).
3. The fiber bragg grating intelligent steel strand as claimed in claim 2, wherein: a connecting rod (65) is further arranged between the two buffer plates (64), and two ends of the connecting rod (65) are fixedly connected with the two buffer plates (64) respectively; the buffer plate (64) and the connecting rod (65) form a protection frame, and the temperature compensation grating (4) is positioned on the inner side of the protection frame.
4. The fiber bragg grating intelligent steel strand as claimed in claim 1, wherein: the guide tube (61) and the strain grating (5) are both positioned on the central axis of the central composite rib (1).
5. The fiber bragg grating intelligent steel strand as claimed in claim 4, wherein: sealing plates (62) are arranged at two ends of the guide pipe (61), and through holes are formed in the sealing plates (62); a protective sleeve (63) is arranged in the through hole, and the optical fiber (3) passes through the protective sleeve (63) and is fixedly connected with the protective sleeve (63).
6. The fiber bragg grating intelligent steel strand as claimed in claim 5, wherein: the protective sleeve (63) comprises a hard portion (631) and a flexible portion (632); the hard part (631) is in sliding fit with the through hole; the flexible portion (632) is located inside the guide tube (61) and fixedly connected to the buffer plate (64).
7. A prestressed structural component for construction, characterized in that: the fiber bragg grating intelligent steel strand comprises a concrete structure (7) and the fiber bragg grating intelligent steel strand as claimed in any one of claims 1 to 6, wherein the fiber bragg grating intelligent steel strand is arranged inside the concrete structure (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410180863.5A CN117738386B (en) | 2024-02-18 | 2024-02-18 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410180863.5A CN117738386B (en) | 2024-02-18 | 2024-02-18 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117738386A true CN117738386A (en) | 2024-03-22 |
| CN117738386B CN117738386B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410180863.5A Active CN117738386B (en) | 2024-02-18 | 2024-02-18 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
Country Status (1)
| Country | Link |
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| CN (1) | CN117738386B (en) |
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|---|---|---|---|---|
| WO1999044026A1 (en) * | 1998-02-27 | 1999-09-02 | Abb Research Ltd. | Pressure sensor with fibre-integrated bragg grating, comprising an integrated temperature sensor with fibre-integrated bragg grating |
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| KR20200142845A (en) * | 2019-06-13 | 2020-12-23 | (주)에프비지코리아 | Bridge inspection apparatus and method |
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2024
- 2024-02-18 CN CN202410180863.5A patent/CN117738386B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044026A1 (en) * | 1998-02-27 | 1999-09-02 | Abb Research Ltd. | Pressure sensor with fibre-integrated bragg grating, comprising an integrated temperature sensor with fibre-integrated bragg grating |
| CN201010859Y (en) * | 2007-04-06 | 2008-01-23 | 中铁大桥(郑州)缆索有限公司 | Intelligent bridge inhaul cable |
| CN101694372A (en) * | 2009-09-30 | 2010-04-14 | 武汉理工大学 | Intelligent cable fiber grating strain sensor |
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| Publication number | Publication date |
|---|---|
| CN117738386B (en) | 2024-05-07 |
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