CN220853486U - Distributed optical fiber sensor for monitoring ruts of asphalt pavement - Google Patents
Distributed optical fiber sensor for monitoring ruts of asphalt pavement Download PDFInfo
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- CN220853486U CN220853486U CN202322471083.XU CN202322471083U CN220853486U CN 220853486 U CN220853486 U CN 220853486U CN 202322471083 U CN202322471083 U CN 202322471083U CN 220853486 U CN220853486 U CN 220853486U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 55
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000010426 asphalt Substances 0.000 title claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 claims abstract description 43
- 230000007935 neutral effect Effects 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 238000005056 compaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
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- 239000011347 resin Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Abstract
A distributed optical fiber sensor for monitoring ruts of asphalt pavement belongs to the field of intelligent monitoring of road structures. The problem that the track deformation of different depths and different layers in a pavement structure cannot be tested in the existing track deformation monitoring of the asphalt pavement is solved. Two optical fibers are symmetrically arranged on two sides of a neutral layer, and a packaging shell A and a packaging shell B are respectively buckled on the outer sides of the two optical fibers to form a packaging protective shell; the two optical fibers are rectangular square waves, the end parts of the two optical fibers are in arc transition, the two ends of the two optical fibers extend to the outer side of the packaging protective shell from the side surface, and the two ends of the two optical fibers are sheathed with an armoured cable; the neutral layer, the packaging shell A and the packaging shell B are respectively provided with a through hole correspondingly; the through holes are positioned between the wave crest and the wave trough of the square wave and are arranged at equal intervals. The utility model is suitable for monitoring the ruts of the asphalt pavement.
Description
Technical Field
The invention belongs to the field of intelligent monitoring of road structures.
Background
Because asphalt mixture can undergo compaction and flowing processes under the action of channelized traffic and high temperature, severe shear damage can even occur. The macroscopic form of the ruts thus often appears as depressions in the track and elevations on both sides.
With the rising development of various detection technologies and the continuous development of equipment automation, the method of manually measuring ruts by means of a cross section ruler is gradually replaced, and a series of new rut detection technologies such as an ultrasonic detection technology, a digital imaging detection technology and a laser detection technology are further developed. However, research based on detection technology can only achieve acquisition of track deformation of road surface, but for a structure composed of multiple layers of materials such as road engineering, track of an asphalt pavement is often closely related to influence of layers of different structures.
In order to understand the influence of deformation of different layers of the asphalt pavement on rut formation, the multi-dimensional digital information which is more comprehensive in space and time is enriched, the internal information of a road structure is required to be acquired, and a structural health monitoring means is often adopted, namely various embedded sensors are arranged. However, most of the existing rut measurement technologies are based on various detection technologies, but the limitation of the tested range has the appearance that rut deformation of the road surface can be detected only, and rut deformation of different depths and layers in the road structure cannot be tested.
Disclosure of Invention
The utility model aims to solve the problem that the track deformation monitoring of the asphalt pavement cannot be performed on track deformation at different depths and at different positions in a pavement structure in the prior art, and provides a distributed optical fiber sensor for track monitoring of the asphalt pavement.
The utility model relates to a distributed optical fiber sensor for monitoring ruts on an asphalt pavement, which comprises the following components: enclosure A1, enclosure B2, neutral layer 3, optical fibers 4 and armor cable 5;
Two optical fibers 4 are symmetrically arranged on two sides of the neutral layer 3, and the packaging shell A1 and the packaging shell B2 are respectively buckled on the outer sides of the two optical fibers 4 to form a packaging protection shell; the two optical fibers are arranged in a rectangular square wave mode, the ends of the rectangular square wave are in arc transition, the two ends of the two optical fibers extend to the outer side of the packaging protective shell from the side face, and the two ends of the two optical fibers are sleeved with the armored cable 5; the armor cable 5 is arranged on the outer side of the packaging protective shell;
the neutral layer 3, the packaging shell A1 and the packaging shell B2 are respectively provided with a through hole correspondingly; the through holes are arranged at equal intervals.
Further, the utility model further comprises a cable protection clamp 6, wherein the two ends of the two optical fibers are clamped with the cable protection clamp 6, and the cable protection clamp 6 is arranged close to the encapsulation protective shell.
Further, in the utility model, the packaging shell A1 and the packaging shell B2 are respectively provided with a clamping groove, and the packaging shell A1 and the packaging shell B2 are clamped together through the clamping grooves.
Further, in the utility model, the packaging shell A1 and the packaging shell B2 are correspondingly provided with grooves and protrusions, and the grooves and the protrusions are correspondingly connected together.
Further, in the present utility model, the package case A1, the package case B2, the neutral layer 3, and the optical fiber 4 are bonded by an adhesive.
Further, in the present utility model, the cable protection clamp 6 includes a hollow screw and a nut, the hollow screw is sleeved on the optical fiber, and the nut is sleeved outside the hollow screw.
According to the light sensor, the distributed optical fiber sensor is characterized in that mass measuring points are distributed along the fiber during testing according to different spatial resolutions of the used distributed optical fiber monitoring equipment, the distance between adjacent measuring points can reach the centimeter and millimeter level, compared with the detection technology, the light sensor is more accurate, the density of the measuring points is adjustable, and rutting deformation monitoring of a structural layer area can be realized. By adopting the mode that the optical fibers are symmetrically distributed up and down on the neutral layer, the decoupling of the distributed optical fiber sensor to the temperature effect can be effectively realized, and the accuracy of the strain test of the sensor is further improved.
Drawings
FIG. 1 is a diagram showing the overall structure;
FIG. 2 is a schematic view of the distribution of the sensor and sensor segment areas after assembly;
Fig. 3 is a schematic structural view of the package case a;
fig. 4 is a schematic structural view of the package case B;
FIG. 5 is a schematic structural view of a neutral layer;
FIG. 6 is a schematic diagram of a fiber routing scheme;
fig. 7 is a schematic structural view of an armored cable and a cable protective jig.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The first embodiment is as follows: referring to fig. 1 to 7, a distributed optical fiber sensor for monitoring ruts on an asphalt pavement according to the present embodiment comprises: enclosure A1, enclosure B2, neutral layer 3, optical fibers 4 and armor cable 5;
Two optical fibers 4 are symmetrically arranged on two sides of the neutral layer 3, and the packaging shell A1 and the packaging shell B2 are respectively buckled on the outer sides of the two optical fibers 4 to form a packaging protection shell; the two optical fibers are arranged in a rectangular square wave mode, the ends of the rectangular square wave are in arc transition, the two ends of the two optical fibers extend to the outer side of the packaging protective shell from the side face, and the two ends of the two optical fibers are sleeved with the armored cable 5; the armor cable 5 is arranged on the outer side of the packaging protective shell;
the neutral layer 3, the packaging shell A1 and the packaging shell B2 are respectively provided with a through hole correspondingly; the through holes are arranged at equal intervals.
In the utility model, the straight line part of the square wave-shaped optical fiber in the sensor is a transverse sensing section 9, and the bending arrangement area of the optical fibers at two sides of the sensor is called a longitudinal sensing section 10, wherein the number and the length of the transverse sensing sections 9 and the length of the longitudinal sensing section 10 can be determined by the actual road.
Further, in this embodiment, referring to fig. 7, the cable protection fixture 6 is further included, two ends of the two optical fibers are clamped with the cable protection fixture 6, and the cable protection fixture 6 is disposed adjacent to the encapsulation protection shell.
Further, in the present embodiment, referring to fig. 7, both the package case A1 and the package case B2 are provided with a clamping groove (7), and the package case A1 and the package case B2 are clamped together.
Further, in this embodiment, the package shell A1 and the package shell B2 are both provided with a clamping groove, and the package shell A1 and the package shell B2 are clamped together through the clamping groove.
The grooves in this embodiment correspond to the protrusions, as shown at 802 and 801 in figures 3 and 4, respectively, which are snap fit together.
The card slots of the package shell A1 and the package shell B2 in this embodiment are rectangular as shown in fig. 3 and 4, and are disposed along the inner sides of the edges of the package shell A1 and the package shell B2.
The neutral layer in this embodiment is made of various plastic, resin, and elastomer materials, and is formed by casting, laser, molding, 3D printing, and the like.
Further, in this embodiment, the package case A1 and the package case B2 are correspondingly provided with a groove and a protrusion, and the groove and the protrusion are correspondingly connected together.
Further, in the present utility model, the package case A1, the package case B2, the neutral layer 3, and the optical fiber 4 are bonded by an adhesive.
Further, in this embodiment, the cable protection clamp 6 includes a hollow screw and a nut, the hollow screw is sleeved on the optical fiber, and the nut is sleeved outside the hollow screw.
The optical fiber 4 is a single-mode bare optical fiber, is symmetrically arranged on the upper surface and the lower surface of the neutral layer 3 along the contour center line of the neutral layer 3, and is bonded with the packaging shell A1, the packaging shell B2 and the neutral layer 3 through an adhesive. The optical fibers 4 disposed on the upper and lower surfaces of the neutral layer 3 may be one optical fiber or may be fused.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (6)
1. A distributed optical fiber sensor for rutting monitoring of asphalt pavement, comprising: a packaging shell A (1), a packaging shell B (2), a neutral layer (3), an optical fiber (4) and an armoured cable (5);
Two optical fibers (4) are symmetrically arranged on two sides of the neutral layer (3), and the packaging shell A (1) and the packaging shell B (2) are respectively buckled on the outer sides of the two optical fibers (4) to form a packaging protective shell; the two optical fibers are arranged in a rectangular square wave mode, the ends of the rectangular square wave are in arc transition, the two ends of the two optical fibers extend to the outer side of the packaging protective shell from the side face, and the two ends of the two optical fibers are sleeved with the armored cable (5); the armor cable (5) is arranged on the outer side of the packaging protective shell;
The neutral layer (3), the packaging shell A (1) and the packaging shell B (2) are respectively provided with a through hole correspondingly; the through holes are arranged at equal intervals.
2. The distributed optical fiber sensor for monitoring rutting on asphalt pavement according to claim 1, further comprising a cable protection clamp (6), wherein two ends of the two optical fibers are clamped with the cable protection clamp (6), and the cable protection clamp (6) is arranged close to the encapsulation protective shell.
3. The distributed optical fiber sensor for monitoring ruts on asphalt pavement according to claim 1 or 2, wherein the packaging shell A (1) and the packaging shell B (2) are provided with clamping grooves, and the packaging shell A (1) and the packaging shell B (2) are clamped together through the clamping grooves.
4. A distributed optical fibre sensor for monitoring rutting on asphalt pavement according to claim 3, wherein the packaging shell a (1) and the packaging shell B (2) are correspondingly provided with grooves and protrusions, and the grooves and the protrusions are correspondingly connected together.
5. A distributed optical fibre sensor for asphalt pavement rut monitoring according to claim 1, characterized in that package a (1), package B (2), neutral layer (3) and optical fibre (4) are bonded by adhesive.
6. A distributed optical fibre sensor for monitoring rutting on asphalt pavement according to claim 1, characterized in that the cable protecting clamp (6) comprises a hollow screw and a nut, the hollow screw is sleeved on the optical fibre, and the nut is sleeved outside the hollow screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322471083.XU CN220853486U (en) | 2023-09-12 | 2023-09-12 | Distributed optical fiber sensor for monitoring ruts of asphalt pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322471083.XU CN220853486U (en) | 2023-09-12 | 2023-09-12 | Distributed optical fiber sensor for monitoring ruts of asphalt pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220853486U true CN220853486U (en) | 2024-04-26 |
Family
ID=90788144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322471083.XU Active CN220853486U (en) | 2023-09-12 | 2023-09-12 | Distributed optical fiber sensor for monitoring ruts of asphalt pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220853486U (en) |
-
2023
- 2023-09-12 CN CN202322471083.XU patent/CN220853486U/en active Active
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