CN220767714U - Parallel steel wire strand with built-in array fiber grating sensor - Google Patents
Parallel steel wire strand with built-in array fiber grating sensor Download PDFInfo
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- CN220767714U CN220767714U CN202322440665.1U CN202322440665U CN220767714U CN 220767714 U CN220767714 U CN 220767714U CN 202322440665 U CN202322440665 U CN 202322440665U CN 220767714 U CN220767714 U CN 220767714U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 239000000835 fiber Substances 0.000 title claims abstract description 63
- 239000013307 optical fiber Substances 0.000 claims abstract description 41
- 238000004806 packaging method and process Methods 0.000 claims abstract description 24
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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Abstract
The utility model discloses a parallel steel wire strand with an array fiber grating sensor, which comprises an optical fiber packaging unit, a plurality of steel wires and a shaping fiber band, wherein the optical fiber packaging unit is arranged on the strand; the optical fiber packaging unit is arranged in the cable body in a through length mode, the optical fiber packaging unit is formed by hinging a steel wire and an open-pore steel pipe at a certain pitch, and the open-pore steel pipe is internally provided with an array type temperature optical fiber grating sensor and an array type humidity optical fiber grating sensor in a packaged mode. The array fiber grating sensor is packaged in the cable stock cable body along the length direction of the cable body in a full length mode, and signal acquisition is completed at the tail end of the cable stock anchor head, so that the full length temperature and relative humidity monitoring inside the main cable is realized.
Description
Technical Field
The utility model relates to the field of bridge member products. More particularly, the present utility model relates to a parallel wire strand with an array-type fiber grating sensor built-in.
Background
The main cable of the suspension bridge consists of a plurality of cable strands with hexagonal cross sections, and a single cable strand is woven by a plurality of high-strength steel wires with diameters of 5-6 mm. The health of the main strand wire is directly related to whether the suspension bridge is in a safe operation state. The main cable state detection methods of a large number of suspension bridges built at home and abroad at present comprise manual inspection, cable maintenance vehicle detection, cable opening inspection and the like, and the methods have the problems of more high-altitude operation, low detection efficiency, poor economy and the like, and can not detect temperature and humidity data affecting corrosion of steel wires in the main cable.
In combination with the characteristics of the array fiber grating sensing technology and the defects of the existing suspension bridge main cable detection method, the parallel steel wire strand with the built-in array fiber grating sensor and the manufacturing method thereof are provided. In the manufacturing stage of the cable strand of a factory, the array fiber bragg grating sensor is packaged in the cable strand of the cable body along the length direction of the cable body in a full-length mode, and signal acquisition is completed at the tail end of the anchor head of the cable strand, so that the monitoring of the total length temperature and relative humidity inside the main cable is realized.
Disclosure of Invention
The utility model combines the characteristics of an array fiber grating sensing technology and the defects of the existing suspension bridge main cable detection method, and provides a parallel steel wire strand with an array fiber grating sensor arranged inside, wherein the array fiber grating sensor is packaged in a strand rope body along the length direction of the rope body in a full-length manner, and signal acquisition is completed at the tail end of a strand anchor head so as to realize monitoring of the total length temperature and relative humidity inside the main cable.
The technical scheme adopted by the utility model for solving the technical problem is as follows: the parallel steel wire strand with the built-in array fiber bragg grating sensor is characterized by comprising an optical fiber packaging unit, a plurality of steel wires and a shaping fiber band;
the optical fiber packaging unit is arranged in the cable body in a through length mode, the optical fiber packaging unit is formed by hinging a steel wire and an open-pore steel pipe at a certain pitch, and the open-pore steel pipe is internally provided with an array type temperature optical fiber grating sensor and an array type humidity optical fiber grating sensor in a packaged mode.
Preferably, the optical fiber packaging unit and the steel wires are woven into a hexagonal rope body, and the periphery of the hexagonal rope body is wound with the shaped fiber belts at intervals.
Preferably, the array type temperature fiber grating sensor and the array type humidity fiber grating sensor are both array type weak fiber grating sensors, and the length of the optical fiber is not less than 3 per mill longer than that of the perforated steel tube.
Preferably, anchor heads are arranged at two ends of the cable body, the parts of the optical fiber packaging units, which are positioned at two ends of the cable body and are provided with the anchor heads, are sleeved with heat insulation sleeves, and the optical fibers at one end of the optical fiber packaging units, which are positioned in the anchor heads, are connected with the lead wires.
Preferably, the heat insulation sleeve is formed by a thick steel pipe, a thin steel pipe and a ceramic pipe from outside to inside coaxially, and a temporary fixing pipe is arranged between the thick steel pipe and the thin steel pipe.
Preferably, the anchor cup of the anchor head is formed by pouring anchor materials, a flange fixing plate and an anchor head cover plate after solidification from the end of the rope body to the other end in sequence;
the flange fixing plate is provided with a hole for fixing the flange, the lead is arranged between the flange fixing plate and the solidified anchor filling material, one end of the lead is an optical fiber and a lead connector, and the other end of the lead is spliced on the flange fixing plate.
The utility model at least comprises the following beneficial effects: the parallel steel wire strand with built-in array fiber grating sensor is suitable for being upgraded into parallel steel wire strands with built-in array fiber grating sensor. Through the manufacturing stage of mill, the open-pore stranded wire of the fiber bragg grating sensor of encapsulation array formula temperature, humidity simultaneously is woven into the cable body inside, and under the prerequisite that does not change cable strand overall structure appearance, and does not influence cable hydrostatic property, has given cable strand self along journey temperature and humidity measurement's function, has solved the inside problem along journey temperature of suspension bridge main cable, that relative humidity can't monitor. The parallel steel wire strand of the built-in array fiber grating sensor has simple manufacturing process, convenient installation, rapid data acquisition and long service life, and is a new structure capable of changing the state monitoring current situation of the main cable of the suspension bridge.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of a parallel wire strand structure of a built-in array fiber grating sensor of the present utility model;
FIG. 2 is a cross-section of a cable body of the present utility model;
FIG. 3 is a stranded wire structure of the packaged array temperature/strain fiber bragg grating sensor of the present utility model;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 3;
FIG. 5 is a schematic diagram of an array type temperature/humidity fiber grating sensor;
fig. 6 is a schematic view of the heat insulating jacket structure.
Reference numerals illustrate: 1. an anchor head cover plate; 2. a flange fixing plate; 3. a lead wire; 4. a wire dividing plate; 5. a heat insulating sleeve; 51. coarse steel pipes; 52. a thin steel pipe; 53. a ceramic tube; 54. temporarily fixing the tube; 6. an optical fiber packaging unit; 62. perforating the steel pipe; 63. opening holes; 7. a steel wire; 8. an anchor head; 9. filling anchor materials; 10. an optical fiber and a lead joint; 11. shaping the fiber band; 12. an array type temperature fiber grating sensor; 121. a fiber core; 122. a cladding layer; 123. a coating; 124. a grating; 13. an array type humidity fiber grating sensor.
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the utility model based on these descriptions. Before describing the present utility model with reference to the accompanying drawings, it should be noted in particular that: the technical solutions and technical features provided in the sections including the following description in the present utility model may be combined with each other without conflict.
In addition, the embodiments of the present utility model referred to in the following description are typically only some, but not all, embodiments of the present utility model. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.
The utility model is further described in detail below with reference to the drawings and the implementation, and the implementation process is as follows:
as shown in fig. 1 to 6, the utility model provides a parallel steel wire 7 strand with an array fiber grating sensor, which comprises an optical fiber packaging unit 6, a plurality of steel wires 7 and a shaping fiber belt 11;
the optical fiber packaging unit 6 is arranged inside the cable body in a through length mode, the optical fiber packaging unit 6 (an open hole 63 stranded wire) is formed by hinging a steel wire 7 and an open hole steel pipe 62 at a certain pitch, an array type temperature optical fiber grating sensor 12 and an array type humidity optical fiber grating sensor 13 are packaged in the open hole steel pipe 62, and open holes 63 are formed in the open hole steel pipe 62 at intervals.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the optical fiber packaging unit 6 and a plurality of steel wires 7 with the same diameter are woven into a hexagonal rope body, the periphery of the hexagonal rope body is wound with a shaping fiber belt 11 at intervals of 1.5m, and the shaping fiber belt 11 is a shaping polyester fiber belt, as shown in figure 2.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the array type temperature fiber grating sensor 12 and the array type humidity fiber grating sensor 13 are all array type weak fiber grating sensors, the reflectivity of all gratings is not more than 1%, and the length of the optical fibers is not less than 3 per mill longer than that of the perforated steel pipe 62. The array type weak fiber bragg grating sensor is composed of a fiber core 121, a cladding 122, a coating 123 and a grating 124, as shown in fig. 5.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the anchor heads 8 are arranged at the two ends of the cable body, the heat insulation sleeve 5 is sleeved on the two ends of the cable body and the parts of the optical fiber packaging unit 6, which are used for installing the anchor heads 8, of the optical fiber packaging unit 6, and the optical fiber at one end of the optical fiber packaging unit 6, which is used for installing the anchor heads 8, is connected with the lead 3.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the heat insulation sleeve 5 is composed of a thick steel pipe 51, a thin steel pipe 52 and a ceramic pipe 53 from outside to inside coaxially, a temporary fixing pipe 54 is arranged between the thick steel pipe 51 and the thin steel pipe, the temporary fixing pipe 54 is arranged non-coaxially with the thick steel pipe 51 and the thin steel pipe, the array type temperature fiber bragg grating sensor 12 and the array type humidity fiber bragg grating sensor 13 are protected from being damaged by high temperature of a casting anchor, the outer diameter of the array type temperature fiber bragg grating sensor is matched with the diameter of an opening 63 of the wire dividing plate 4, and the length of the array type temperature fiber bragg grating sensor is larger than the casting anchor length, as shown in fig. 6.
The technical scheme can also comprise the following technical details so as to better realize the technical effects: the anchor cup of the anchor head 8 is formed by a solidified anchor pouring material 9, a flange fixing plate 2 and an anchor head 8 cover plate 1 from the end of the rope body to the other end in sequence; the flange fixing plate 2 and the cover plate 1 of the anchor head 8 are connected with the anchor cup.
The flange fixing plate 2 is provided with a hole 63 for fixing the flange, the lead 3 is arranged between the flange fixing plate 2 and the cured anchor filling material 9, one end of the lead 3 is an optical fiber and a lead connector 10, and the other end is spliced on the flange fixing plate 2.
Example 2
A manufacturing method of a parallel steel wire 7 strand of a built-in array fiber grating sensor comprises the following steps: the method comprises the following steps:
(1) The parallel steel wire 7 inhaul cable with the built-in fiber bragg grating sensor comprises an array type temperature and humidity fiber bragg grating sensor, an open hole 63 stranded wire for packaging the array type temperature and humidity fiber bragg grating sensor, a steel wire 7, a lead wire 3, a heat insulation sleeve 5, a flange fixing plate 2, an anchor head 8 and the like.
(2) Producing a steel belt with a certain width, wherein the width of the steel belt is larger than 1cm, the thickness of the steel belt is 2mm, and a mechanical puncher is used for punching holes on the steel belt before the reel according to the designed aperture (1 mm) and the distance (more than or equal to 20 cm).
(3) Before the perforated 63 steel belt is rolled into a steel pipe, an array type temperature and humidity fiber grating sensor is synchronously pulled and buried into the steel pipe to form a steel pipe package, the steel pipe production speed is not more than 60m/min, then the perforated steel pipe 62 packaged with the optical fibers and the other 6 steel wires 7 are hinged into a perforated 63 stranded wire (with the diameter of 5-6 mm), and the hinging speed is not more than 60m/min.
(4) The twisted wires with the holes 63 and a plurality of steel wires 7 with the same diameter are woven into a hexagonal rope body, and the shaped polyester fiber belts are wound at equal intervals of 1.5 m.
(6) Anchor heads 8 are arranged at two ends of the cable body, steel wires 7 at two ends of the cable body are scattered, and the optical fibers in the stranded wires with the holes 63 are stripped for 1m in length and connected with the lead wires 3.
(7) The heat insulation sleeve 5 and the wire dividing plate 4 are installed, the wire dividing plate 4 is used for fixing the steel wires 7, and the wire dividing plate 4 is clamped inside the anchor head 8.
(8) And pouring a zinc-copper alloy anchor filling material 9 into the anchor head 8, taking out the temporary fixing tube 54 in the heat insulation sleeve 5 when the temperature in the heat insulation sleeve 5 in the anchor head 8 is reduced to 100 ℃, and filling epoxy fixing glue into the gap.
(9) The 2 lead wires 3 are connected with one side of the flange on the flange fixing plate 2, the length of the lead wires 3 is endowed to be coiled and placed in the anchor cup, and the flange fixing plate 2 is also placed in the anchor cup for fixing.
(10) And installing the cover plate 1 of the anchor head 8 to finish the manufacture of the fiber bragg grating strand.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for which the utility model is suited, and further modifications may be readily made by one skilled in the art, and the utility model is therefore not to be limited to the particular details and examples shown and described herein, without departing from the general concepts defined by the claims and the equivalents thereof.
Claims (6)
1. The parallel steel wire strand with the built-in array fiber bragg grating sensor is characterized by comprising an optical fiber packaging unit, a plurality of steel wires and a shaping fiber band;
the optical fiber packaging unit is arranged in the cable body in a through length mode, the optical fiber packaging unit is formed by hinging a steel wire and an open-pore steel pipe at a certain pitch, and the open-pore steel pipe is internally provided with an array type temperature optical fiber grating sensor and an array type humidity optical fiber grating sensor in a packaged mode.
2. The parallel steel wire strand of the built-in array fiber bragg grating sensor of claim 1, wherein the fiber packaging unit and the plurality of steel wires are woven into a hexagonal rope body, and a shaped fiber band is wound around the periphery of the hexagonal rope body at intervals.
3. The parallel steel wire strand of the built-in array fiber bragg grating sensor of claim 1, wherein the array temperature fiber bragg grating sensor and the array humidity fiber bragg grating sensor are both array weak fiber bragg grating sensors, and the fiber length is not less than 3 per mill longer than that of the perforated steel tube.
4. The parallel steel wire strand of the built-in array fiber bragg grating sensor according to claim 1, wherein anchor heads are installed at two ends of the cable body, a heat insulation sleeve is sleeved on the two ends of the cable body and the part where the anchor heads are installed, and an optical fiber at one end of the optical fiber packaging unit located in the anchor heads is connected with a lead wire.
5. The parallel steel wire strand of the built-in array fiber grating sensor according to claim 4, wherein the heat insulation sleeve is formed by a thick steel tube, a thin steel tube and a ceramic tube from outside to inside coaxially, and a temporary fixing tube is arranged between the thick steel tube and the thin steel tube.
6. The parallel steel wire strand of the built-in array fiber bragg grating sensor of claim 4, wherein the anchor cup of the anchor head is composed of a cable body end, a solidified anchor pouring material, a flange fixing plate and an anchor head cover plate in sequence from the other end;
the flange fixing plate is provided with a hole for fixing the flange, the lead is arranged between the flange fixing plate and the solidified anchor filling material, one end of the lead is an optical fiber and a lead connector, and the other end of the lead is spliced on the flange fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322440665.1U CN220767714U (en) | 2023-09-08 | 2023-09-08 | Parallel steel wire strand with built-in array fiber grating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322440665.1U CN220767714U (en) | 2023-09-08 | 2023-09-08 | Parallel steel wire strand with built-in array fiber grating sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220767714U true CN220767714U (en) | 2024-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322440665.1U Active CN220767714U (en) | 2023-09-08 | 2023-09-08 | Parallel steel wire strand with built-in array fiber grating sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220767714U (en) |
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2023
- 2023-09-08 CN CN202322440665.1U patent/CN220767714U/en active Active
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