High-tolerance sensing optical cable structure suitable for laying asphalt pavement layer

Abstract

The utility model relates to a high-tolerance sensing optical cable structure suitable for laying an asphalt pavement surface layer, which comprises a sensing optical fiber, an anti-impact layer, a metal stranded layer, a metal armor layer and an outer sheath layer, and is characterized in that the anti-impact layer wraps the sensing optical fiber; the metal stranded layer wraps the anti-impact layer; the metal armor layer wraps the metal stranded layer. The outer sheath layer wraps the metal armor layer. When the asphalt pavement material is damaged by a vehicle, the sensing optical cable is exposed, so that under the wrapping constraint of the metal armor layer and the outer sheath layer, the steel wire of the metal stranded layer can be effectively prevented from being in contact with a running tire to cause a potential safety hazard of passing; meanwhile, when the asphalt pavement is paved, the outer sheath layer is softened in a high-temperature environment, and the outer sheath layer is tightly attached to the asphalt under the rolling compaction of engineering machinery, so that the overall coupling property is improved, and the transmission effectiveness of temperature and vibration signals is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to distributed optical fiber sensing technology field especially applicable to high tolerance type sensing optical cable structure of pitch pavement layer laying. BACKGROUND

[0002] The grating array distributed optical fiber sensing technology because of its own "large capacity", "long distance", "high precision" and "high reliability" technical characteristics, after the high -speed pavement lane level paving, from the brand -new dimension, gives the highway "touch" perception function, promotes wisdom high -speed perception technology to higher level.

[0003] When pitch pavement construction, not only the close coupling of the detection optical cable and pitch pavement material needs to be considered, but also the rolling of large engineering machinery during pitch pavement construction and the high temperature of pitch material when leaving factory need to be considered, at the same time, the vehicle traffic safety problem after pitch pavement damage needs to be improved, the conventional embedded detection optical cable obviously does not meet the construction requirement of high pressure and high temperature.

[0004] In summary, solving the high tolerance and safety problem of detection optical cable during pitch layer construction of highway is the core key of the wide popularization and application of distributed optical fiber sensing technology in wisdom highway field. UTILITY MODEL CONTENT

[0005] Therefore, it is necessary to provide a high tolerance type sensing optical cable structure applicable to pitch pavement layer laying to solve the high tolerance and safety problem of detection optical cable during pitch layer construction of highway.

[0006] The utility model provides a high tolerance type sensing optical cable structure applicable to pitch pavement layer laying, including sensing optical fiber, impact resistance layer, metal stranding layer, metal armor layer and outer sheath layer, the impact resistance layer is wrapped sensing optical fiber setting, metal stranding layer is wrapped impact resistance layer setting, metal armor layer is wrapped metal stranding layer setting, the outer sheath layer is wrapped metal armor layer setting, the outer sheath layer is configured as after heating can soften, and deformation and pitch closely under extrusion.

[0007] Further, the sensing optical fiber is high-temperature-resistant grating array sensing optical fiber or high-temperature-resistant distributed sensing optical fiber.

[0008] Further, the impact resistance layer includes an inner layer seamless welded pipe, which is arranged between the sensing optical fiber and the metal stranding layer.

[0009] Further, it further includes hydrogen fiber paste filling between the sensing optical fiber and the inner layer seamless welded pipe.

[0010] Further, the wall thickness of the inner layer seamless welded pipe is not greater than 0.3 mm.

[0011] Furthermore, the impact-resistant layer includes an outer seamless welded pipe, and the outer seamless welded pipe is arranged between the inner seamless welded pipe and the metal stranded layer.

[0012] Furthermore, the inner layer seamless welded pipe and the outer layer seamless welded pipe are both stainless steel strips formed by longitudinal wrapping welding.

[0013] Furthermore, the inner layer seamless welded pipe and the outer layer seamless welded pipe are tightly fitted.

[0014] Furthermore, the metal armor layer is a rubber-coated steel strip.

[0015] Furthermore, the outer sheath layer is a PE tube.

[0016] Compared with the existing technology, the impact-resistant layer provided can provide the optical cable structure with good mechanical impact tolerance. The metal stranded layer provides the optical cable structure with anti-punch ability, while also enhancing the overall bending and tensile properties of the optical cable structure. The above-mentioned setting enables the optical cable structure to adapt to the high tolerance requirements during the construction of asphalt layers on highways. When the asphalt pavement material is damaged by a vehicle, the sensing optical cable is exposed. Therefore, under the wrapping and restraint of the metal armor layer and the outer sheath layer, the steel wire of the metal stranded layer can be effectively prevented from contacting the vehicle tires and causing traffic safety hazards. At the same time, when the asphalt pavement is paved, the outer sheath layer softens in a high temperature environment, and under the rolling of engineering machinery, the outer sheath layer fits tightly with the asphalt, which improves the overall coupling and enhances the transmission effectiveness of temperature and vibration signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Fig. 1 A schematic diagram of the overall structure of a high-tolerance optical sensor cable suitable for laying on asphalt pavement surfaces provided by an embodiment of the present invention;

[0018] Fig. 2 This is a schematic cross-sectional view of the entire structure of a high-tolerance sensor optical cable suitable for laying on asphalt pavement provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0020] like Figs. 1-2As shown, the utility model provides a kind of high tolerance type sensing optical cable structure suitable for asphalt pavement layer laying, including sensing optical fiber 100, impact resistance layer 200, metal stranding layer 300, metal armor layer 400 and outer sheath layer 500, sensing optical fiber 100 is wrapped by impact resistance layer 200 setting;Metal stranding layer 300 is wrapped by impact resistance layer 200 setting;Metal armor layer 400 is wrapped by metal stranding layer 300 setting;Outer sheath layer 500 is wrapped by metal armor layer 400 setting, outer sheath layer 500 is configured as after heating can soften, and deform under extrusion and closely adhere with asphalt.

[0021] When implementing, the impact resistance layer 200 provided can provide good mechanical impact resistance for the optical cable structure, the metal stranding layer 300 provides the optical cable structure with the ability to resist stamping, while also enhancing the bending performance and tensile performance of the overall optical cable structure. Through the above settings, the optical cable structure can meet the high resistance requirements during the construction of the asphalt layer of the highway. When the asphalt pavement material is damaged by vehicles, the sensing optical cable may be exposed. Therefore, under the wrapping and restraint of the metal armor layer 400 and the outer sheath layer 500, the steel wires of the metal stranding layer 300 can be effectively prevented from coming into contact with the tires of the vehicles, thereby avoiding potential safety hazards. At the same time, during the paving of the asphalt pavement, the outer sheath layer 500 softens in a high-temperature environment, and under the rolling of the engineering machinery, the outer sheath layer 500 closely adheres to the asphalt, improving the overall coupling and enhancing the effectiveness of temperature and vibration signal transmission.

[0022] The sensing optical fiber 100 in the present embodiment is a high-temperature resistant grating array sensing optical fiber or a high-temperature resistant distributed sensing optical fiber. The coating material of the sensing optical fiber 100 is modified polyacrylate or polyimide, which has a short-term high-temperature resistance of above 180°C, ensuring that the sensing optical fiber 100 maintains effective sensing function under high-temperature baking during the paving of the asphalt pavement material.

[0023] The impact resistance layer 200 in the present embodiment wraps the sensing optical fiber 100, which can provide good mechanical impact resistance for the optical cable structure.

[0024] In one embodiment, the impact resistance layer 200 includes an inner seamless welded pipe 210, which is arranged between the sensing optical fiber 100 and the metal stranding layer 300. The inner seamless welded pipe 210 is made by a cold-drawing hardening and springback process, so that the sensing optical fiber 100 inside the inner seamless welded pipe 210 forms an excess length that meets the use requirements. The size of the excess length is controlled by adjusting the pay-off tension and the cold-drawing tension of the sensing optical fiber 100.

[0025] When the sensing optical fiber 100 is a temperature sensing optical fiber, the inner seamless welded tube 210 in the embodiment adopts a dry filling-free structure, which can avoid stress cross-influence and improve temperature measurement accuracy; when the sensing optical fiber 100 is a vibration sensing optical fiber, in order to improve effective transmission of the vibration signal and its transmission uniformity, the optical cable structure in the embodiment further comprises hydrogen fiber paste filling between the sensing optical fiber 100 and the inner seamless welded tube 210.

[0026] Due to the limitation of the wall thickness of the inner seamless welded tube 210, the impact resistance strength provided by the inner seamless welded tube 210 is not enough relative to the heavy mechanical impact in asphalt pavement paving, therefore, in an embodiment, the impact resistance layer 200 comprises an outer seamless welded tube 220, which is arranged at a position between the inner seamless welded tube 210 and the metal stranded layer 300. Wherein, the wall thickness of the inner seamless welded tube 210 and the outer seamless welded tube 220 are both not greater than 0.3 mm.

[0027] Wherein, the inner seamless welded tube 210 and the outer seamless welded tube 220 are both stainless steel strips formed by longitudinal welding, and the inner seamless welded tube 210 and the outer seamless welded tube 220 are tightly combined through cold drawing hardening. The double-layer welded tube structure formed by the inner seamless welded tube 210 and the outer seamless welded tube 220 can provide higher mechanical impact resistance for the optical cable structure.

[0028] Although the above double-layer seamless welded tube structure has enough impact resistance, the overall flexibility, tensile resistance and bending resistance are poor, therefore, in the embodiment, a metal stranded layer 300 is designed outside the impact resistance layer 200. Wherein, the metal stranded layer 300 can be made of galvanized steel wire, aluminum-coated steel wire, phosphorized steel wire or stainless steel wire and processed by S-stranding or SZ-stranding process, which further provides impact resistance for the optical cable structure, and also enhances the bending performance and tensile resistance of the overall optical cable structure.

[0029] The metal armor layer 400 in the embodiment is a rubber-coated steel strip. The metal armor layer 400 can adopt a corrugation process to improve its flexibility.

[0030] The outer sheath layer 500 in the embodiment is a PE tube. Of course, the outer sheath layer 500 can also be made of other materials that soften at high temperatures.

[0031] Compared with the prior art, the impact resistance layer 200 provided can provide good mechanical impact resistance for the optical cable structure, the metal stranded layer 300 provides the impact resistance for the optical cable structure and enhances the bending performance and tensile performance of the whole optical cable structure, the optical cable structure can meet the demand of high resistance in the highway asphalt layer construction through the above arrangement; when the asphalt pavement material is damaged by vehicles, the sensing optical cable is exposed, and therefore, under the wrapping and binding of the metal armor layer 400 and the outer sheath layer 500, the steel wires of the metal stranded layer 300 can be effectively prevented from contacting the driving tire to cause the traffic safety hazard; meanwhile, when the asphalt pavement is paved, the outer sheath layer 500 is softened under the high-temperature environment and closely adheres to the asphalt under the rolling of the engineering machinery, the overall coupling is improved, and the transmission effectiveness of the temperature and vibration signals is enhanced.

[0032] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A high-tolerance sensor optical cable structure suitable for laying on asphalt pavement, characterized in that: include: Sensing fiber; an impact-resistant layer wrapping the sensing optical fiber arrangement; a metal stranded layer disposed around the impact-resistant layer; a metal armor layer, which is arranged to wrap the metal twisted layer; The outer sheath layer is arranged to wrap the metal armor layer, and the outer sheath layer is configured to be softened after being heated, and to be deformed under extrusion and closely adhere to the asphalt.

2. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 1 is characterized in that: The sensing optical fiber is a high-temperature resistant grating array sensing optical fiber or a high-temperature resistant distributed sensing optical fiber.

3. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 1 is characterized in that: The impact-resistant layer includes an inner seamless welded pipe, and the inner seamless welded pipe is arranged at a position between the sensing optical fiber and the metal twisted layer.

4. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 3 is characterized in that: It also includes a hydrogen fiber paste filler filled between the sensing optical fiber and the inner seamless welded pipe.

5. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 3 is characterized in that: The wall thickness of the inner layer seamless welded pipe is not greater than 0.3 mm.

6. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 5 is characterized in that: The impact-resistant layer includes an outer seamless welded pipe, which is disposed between the inner seamless welded pipe and the metal stranded layer.

7. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 6 is characterized in that: The inner layer seamless welded pipe and the outer layer seamless welded pipe are both stainless steel strips formed by longitudinal wrapping welding.

8. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 6 is characterized in that: The inner layer seamless welded pipe and the outer layer seamless welded pipe are tightly fitted together.

9. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 1 is characterized in that: The metal armor layer is a rubber-coated steel strip.

10. The high-tolerance sensor optical cable structure suitable for asphalt pavement laying according to claim 1 is characterized in that: The outer sheath layer is a PE pipe.

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