Distributed optical fiber sensor protection structure suitable for asphalt pavement

Abstract

The utility model relates to the technical field of road detection, in particular to a distributed optical fiber sensor protection structure suitable for an asphalt pavement, which comprises a protection shell, and a plurality of detection heads are mounted on the upper side of the protection shell; fixing mechanisms are mounted at the bottom, the left side and the right side of the protective shell; a moving mechanism is mounted in the protective shell; sliding grooves are formed in the inner walls of the front side and the rear side in the protective shell. A display mechanism is mounted on the right side of the protective shell in a matched manner; according to the moving mechanism, the moving plate is pulled out of the protective shell by pulling the handle, so that all electrical components on the moving plate can be overhauled and replaced, the electrical components are pushed back into the protective shell after being overhauled, operation is simple, replacement is convenient, all-directional disassembly and replacement are not needed, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of road detection, in particular to a distributed optical fiber sensor protection structure suitable for asphalt pavement. Background Art

[0002] In recent years, with the increase in traffic volume and the continuous emergence of overloading, many roads have prematurely experienced pavement disease problems, such as rutting, fatigue, cracks, looseness, etc. Road diseases not only affect the performance of roads, but also bring hidden dangers to highway traffic safety. Most road diseases start from minor damage in the early stage. If they are not discovered and maintained in time, they will cause large-scale damage to the overall structure and greatly shorten the service life of the highway. A major reason for the premature appearance of pavement diseases is the lack of road axle load data, traffic data, and related operation data, making it difficult to form corresponding maintenance and prevention measures in time. Therefore, road structure monitoring is particularly important for the full life cycle maintenance management of road facilities, and the key to monitoring is to obtain road data in a long-term, large-scale and accurate manner.

[0003] A Chinese patent discloses a distributed optical fiber sensor protection suitable for asphalt pavement (authorization announcement number CN214471439U). The patented technology can include a first protective layer and a second protective layer. The optical fiber is coiled on the first protective layer along the asphalt pavement horizontally, and the second protective layer is wound on the first protective layer and the outside of the optical fiber along the asphalt pavement longitudinally to form a sensor package. The sensor package is fixed on the substrate through a first adhesive layer, and the asphalt concrete layer covers the sensor package. The optical fiber connector is located on the outside of the asphalt pavement. The size of the packaged sensor package is much larger than the asphalt particles, which can better achieve the deformation coordination of the distributed optical fiber sensor and the asphalt concrete layer, thereby obtaining more effective road load response data with good accuracy. During the burial process of the sensor package, no additional grooving is required on the substrate, and the installation is simple and the construction efficiency is high. However, after a long period of use, the device may have a second adhesive layer on the first protective layer, and the viscosity may decrease, causing the movement of the optical fiber sensor. It is also inconvenient to maintain and replace, and the operation is more troublesome.

[0004] Therefore, those skilled in the art provide a distributed optical fiber sensor protection structure suitable for asphalt pavement to solve the problems raised in the above background technology. Utility Model Content

[0005] To solve the above technical problems, the utility model provides a distributed optical fiber sensor protection structure suitable for asphalt pavement, which includes a protective shell. A plurality of detection heads are installed on the upper side of the protective shell; fixing mechanisms are installed at the bottom and on the left and right sides of the protective shell; a moving mechanism is installed inside the protective shell; sliding grooves are formed on the front and rear inner walls inside the protective shell; a display mechanism is installed on the right side of the protective shell.

[0006] Preferably: The fixing mechanism includes a first nail head, and a plurality of first nail heads are installed at the bottom of the protective shell; a fixing plate is installed on the outer wall of the left side of the protective shell, and a second nail head is installed at the bottom of the fixing plate; an installation plate is installed on the right side of the protective door on the outer wall of the right side of the protective shell, a hole is formed in the installation plate, a third nail head is installed in the hole, and a thread is provided on the third nail head; a top plate is installed at the top of the third nail head, which can prevent the third nail head from being screwed out of the installation plate.

[0007] Preferably: A protective door is installed on the right side of the protective shell, and a rotating shaft is installed between the protective door and the protective shell; two symmetrically arranged screw holes are installed at the lower right of the protective door and the lower right of the protective shell in the front and rear directions, and bolts are installed on the screw holes.

[0008] Preferably: The moving mechanism includes a moving plate, a plurality of optical fiber sensors are installed on the upper side of the moving plate, a refrigerating sheet is installed on one side of the optical fiber sensors, sliding blocks are installed on the front and rear sides of the moving plate, the sliding blocks are embedded in the sliding grooves, and a handle is installed on the right side of the moving plate; the moving mechanism can pull out the moving plate from the protective shell by pulling the handle, so that each electrical component on the moving plate can be repaired and replaced. After the repair, it can be pushed back into the protective shell. The operation is simple, the replacement is convenient, and there is no need for all-round disassembly and replacement, which saves time and effort.

[0009] Preferably: The display mechanism includes a display box, a battery is installed inside the display box, a display screen is installed on the left side of the display box; a ventilation hole is installed on the right side of the display box; a moving groove is installed at the rear of the front side of the display box; a brush plate is installed in the moving groove, a groove is installed on the front side of the brush plate to facilitate the movement of the brush plate; bristles are installed on the left and right sides of the brush plate, and a dust-proof cover is installed in the moving groove; the dust-proof cover is used to prevent dust from entering the display box from the moving groove; support feet are installed at the bottom of the display box, fixing blocks are installed on the support feet, and nuts are installed on the fixing blocks.

[0010] The technical effects and advantages of the utility model:

[0011] 1. The present utility model provides a distributed optical fiber sensor protection structure suitable for asphalt pavements. By pulling the handle, the moving plate can be pulled out of the protective shell, and then each electrical component on the moving plate can be repaired and replaced. After the repair, it can be pushed back into the protective shell. The operation is simple and the replacement is convenient. There is no need for a full-scale disassembly and replacement, which saves time and effort.

[0012] 2. When in use, the brush plate is moved up and down by holding the groove on the brush plate. The bristles on the brush plate clean the air vents, which is convenient for heat dissipation at the bottom of the air vents and avoids the temperature inside the display box from being too high. The position of the optical fiber sensor can also be conveniently judged through the display box, which avoids the inability to find the optical fiber sensor later and affects the repair and replacement.

[0013] 3. When in use, for the fixing mechanism, a notch is made in the asphalt road, and then the protective shell is placed in the notch. By squeezing the protective shell, the first nail head is first pressed into the soil, and then the second nail head on the left is further pressed into the soil to achieve further fixation. At this time, the third nail head is screwed into the soil by rotation, and then the asphalt concrete is filled and restored, and the fixation of the optical fiber sensor can be completed, and it will not move easily later. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of a distributed optical fiber sensor protection structure suitable for asphalt pavements provided by an embodiment of the present application;

[0015] Figure 2 is the reverse axonometric view of a distributed optical fiber sensor protection structure suitable for asphalt pavements provided by an embodiment of the present application;

[0016] Figure 3 is the exploded view of a distributed optical fiber sensor protection structure suitable for asphalt pavements provided by an embodiment of the present application;

[0017] Figure 4 is in a distributed optical fiber sensor protection structure suitable for asphalt pavements provided by an embodiment of the present application Figure 3 The enlarged structural schematic diagram of part A;

[0018] Figure 5 is in a distributed optical fiber sensor protection structure suitable for asphalt pavements provided by an embodiment of the present application Figure 3 The enlarged structural schematic diagram of part B;

[0019] Figure 6 is the control flow chart of a distributed optical fiber sensor protection structure suitable for asphalt pavements provided by an embodiment of the present application;

[0020] In the figure: 1, protective housing; 2, detection head; 3, first nail head; 31, second nail head; 4, fixing plate; 41, mounting plate; 5, protective door; 6, rotating shaft; 7, third nail head; 71, top plate; 8, bolt; 81, screw hole; 9, sliding groove; 10, moving plate; 11, refrigerating sheet; 12, fiber optic sensor; 13, handle; 14, slider; 15, supporting foot; 16, fixing block; 17, nut; 18, sunshade; 19, ventilation hole; 20, display box; 201, moving groove; 21, display screen; 23, dust cover; 24, brush plate; 25, brush bristles. Detailed implementation manners

[0021] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. The embodiments of the present utility model are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the present utility model to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present utility model, and to enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0022] Embodiment

[0023] Please refer to Figures 1 to 6 , in this embodiment, a distributed fiber optic sensor protection structure suitable for asphalt pavement is provided, including a protective housing 1. A plurality of detection heads 2 are installed on the upper side of the protective housing 1, and the detection heads 2 facilitate the detection of the fiber optic sensor 12; fixing mechanisms are installed at the bottom and on the left and right sides of the protective housing 1, and the fixing mechanisms facilitate more firmly fixing the fiber optic sensor protection structure on the asphalt road; a moving mechanism is installed inside the protective housing 1, and the moving mechanism facilitates moving the fiber optic sensor 12 out of the protective housing 1 for convenient later maintenance; sliding grooves 9 are formed on the front and rear inner walls inside the protective housing 1; a display mechanism is installed in a matching manner on the right side of the protective housing 1 to reflect the road conditions detected by the fiber optic sensor 12 for convenient viewing and maintenance by maintenance personnel;

[0024] The fixing mechanism includes a first nail head 3, and several first nail heads 3 are installed at the bottom of the protective shell 1; a fixing plate 4 is installed on the left outer wall of the protective shell 1, and a second nail head 31 is installed at the bottom of the fixing plate 4; on the right side of a protective door 5 on the right outer wall of the protective shell 1, a mounting plate 41 is installed, a hole is formed in the mounting plate 41, and a third nail head 7 is installed in the hole. Threads are provided on the third nail head 7; a top plate 71 is installed at the top of the third nail head 7, which can prevent the third nail head 7 from being screwed out of the mounting plate 41. When the fixing mechanism is in use, a notch is made in the asphalt road, and then the protective shell 1 is placed in the notch. By squeezing the protective shell 1, the first nail head 3 is first pressed into the soil, and then the second nail head 31 on the left is further pressed into the soil to achieve the purpose of further fixation. At this time, the third nail head 7 is rotated and screwed into the soil, and then the asphalt concrete is filled and restored, so as to complete the fixation of the fiber optic sensor 12 and prevent it from moving easily in the later stage;

[0025] A protective door 5 is installed on the right side of the protective shell 1, and a rotating shaft 6 is installed between the protective door 5 and the protective shell 1; two symmetrically arranged screw holes 81 are installed on the lower right side of the protective door 5 and the lower right side of the protective shell 1, and bolts 8 are installed on the screw holes 81. When the fiber optic sensor 12 inside the protective shell 1 needs to be repaired, first screw the third nail head 7 out of the ground, then loosen the bolts 8 and open and close the protective door 5 through the rotating shaft 6, which is convenient for subsequent repairs; a waterproof film is installed between the protective door 5 and the protective shell 1. To prevent rainwater from seeping into the protective shell 1 when it rains;

[0026] The moving mechanism includes a moving plate 10, several fiber optic sensors 12 are installed on the upper side of the moving plate 10, a refrigerating sheet 11 is installed on one side of the fiber optic sensor 12, sliding blocks 14 are installed on the front and rear sides of the moving plate 10, the sliding blocks 14 are embedded in sliding grooves 9, and a handle 13 is installed on the right side of the moving plate 10. The moving mechanism pulls out the moving plate 10 from the protective shell 1 by pulling the handle 13, so that each electrical component on the moving plate 10 can be repaired and replaced. After the repair, it can be pushed back into the protective shell 1. The operation is simple, the replacement is convenient, and there is no need for a full - scale disassembly and replacement, which saves time and effort;

[0027] The display mechanism includes a display box 20, inside which a battery is installed. On the left side of the display box 20, a display screen 21 is installed to display the road conditions detected by the fiber optic sensor 12. A power supply and a PLC processor are installed in the display box 20. On the right side of the display box 20, a ventilation hole 19 is installed to facilitate the heat dissipation of the display box 20. On the top of the display box 20, a sunshade 18 is installed to block the sun and rain. The fiber optic sensor 12 transmits the detected road conditions to the PLC processor through a data cable (not shown) for data processing, and finally the processed data information is fed back through the display screen 21 on the display box 20, which is convenient for the workers repairing the road conditions to query and view, and is convenient for later maintenance.

[0028] At the rear side and slightly to the front of the display box 20, a moving groove 201 is installed. Inside the moving groove 201, a brush plate 24 is installed. At the front side of the brush plate 24, a groove is installed to facilitate the movement of the brush plate 24. On the left and right sides of the brush plate 24, bristles 25 are installed. Inside the moving groove 201, a dust cover 23 is installed. The dust cover 23 is used to prevent dust from entering the display box 20 from the moving groove 201. During use, the brush plate 24 is moved up and down by holding the groove on the brush plate 24, and the bristles 25 on the brush plate 24 clean the ventilation hole 19 to facilitate the heat dissipation at the bottom of the ventilation hole 19 and prevent the temperature inside the display box 20 from being too high.

[0029] At the bottom of the display box 20, support feet 15 are installed. On the support feet 15, fixing blocks 16 are installed. On the fixing blocks 16, nuts 17 are installed. By inserting the bottom of the support feet 15 into the ground, moving the fixing blocks 16 downward to increase the contact area with the ground, and then tightening the nuts 17, the display box 20 can be fixed. Through the display box 20, the position of the fiber optic sensor 12 can also be conveniently determined to avoid not being able to find the fiber optic sensor 12 later, which affects the maintenance and replacement.

[0030] Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A distributed optical fiber sensor protection structure applicable to asphalt pavement, characterized in that, It includes a protective shell (1), and several detection heads (2) are installed on the upper side of the protective shell (1); Fixing mechanisms are installed at the bottom and on the left and right sides of the protective shell (1); A moving mechanism is installed inside the protective shell (1); An optical fiber sensor (12) is installed inside the protective shell (1); Chutes (9) are formed on the inner walls of the front and rear sides inside the protective shell (1); A display mechanism is installed on the right side of the protective shell (1).

2. The distributed optical fiber sensor protection structure applicable to an asphalt pavement according to claim 1, wherein, The fixing mechanism includes a first nail head (3), and several first nail heads (3) are installed at the bottom of the protective shell (1); a fixing plate (4) is installed on the outer wall of the left side of the protective shell (1), and a second nail head (31) is installed at the bottom of the fixing plate (4); on the right side of a protective door (5) on the outer wall of the right side of the protective shell (1), a mounting plate (41) is installed, a hole is formed in the mounting plate (41), a third nail head (7) with a thread is installed in the hole, and a top plate (71) is installed at the top of the third nail head (7) to prevent the third nail head (7) from being screwed out of the mounting plate (41).

3. The distributed optical fiber sensor protection structure applicable to an asphalt pavement according to claim 1, wherein A protective door (5) is installed on the right side of the protective shell (1), and a rotating shaft (6) is installed between the protective door (5) and the protective shell (1); two symmetrically arranged screw holes (81) are installed on the lower right side of the protective door (5) and the lower right side of the protective shell (1) in the front and rear directions, and bolts (8) are installed on the screw holes (81).

4. A distributed optical fiber sensor protection structure applicable to an asphalt pavement according to claim 1, characterized in that, The moving mechanism includes a moving plate (10), several optical fiber sensors (12) are installed on the upper side of the moving plate (10), a refrigerating sheet (11) is installed on one side of the optical fiber sensor (12), sliders (14) are installed on the front and rear sides of the moving plate (10), the sliders (14) are embedded in the chutes (9), and a handle (13) is installed on the right side of the moving plate (10).

5. The distributed optical fiber sensor protection structure applicable to asphalt pavement according to claim 1, characterized in that, The display mechanism includes a display box (20), a battery is installed inside the display box (20), a display screen (21) is installed on the left side of the display box (20); a ventilation hole (19) is installed on the right side of the display box (20); a sunshade (18) is installed on the top of the display box (20) to block the sun and rain.

6. The distributed optical fiber sensor protection structure applicable to an asphalt pavement according to claim 5, characterized in that, A moving slot (201) is installed at the rear side of the front side of the display box (20); a brush plate (24) is installed in the moving slot (201), a groove is installed on the front side of the brush plate (24); brush hairs (25) are installed on the left and right sides of the brush plate (24), a dust-proof cover (23) is installed in the moving slot (201); support feet (15) are installed at the bottom of the display box (20), fixing blocks (16) are installed on the support feet (15), and nuts (17) are installed on the fixing blocks (16).

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