Heterogeneous intelligent optical cable

Abstract

The application relates to the technical field of optical cables, and particularly discloses a special-shaped intelligent optical cable, which comprises a sensing cable core, an inner protective layer and an outer protective layer, wherein the cross section of the sensing cable core is circular; the cross section of the inner protective layer is fan-shaped, the inner protective layer comprises an outer arc surface, an inner arc surface and two side surfaces, the outer arc surface and the inner arc surface are concentrically arranged, the two side surfaces are respectively used for connecting two ends of the outer arc surface and the inner arc surface, and the sensing cable core is located in the inner protective layer; and the outer protective layer is at least coated on the inner arc surface and is used for being attached to the outer wall of a measured object with an arc surface. The above arrangement enables the inner protective layer to be attached to the outer wall of a pipeline when being installed in the pipeline, so that dislocation between the special-shaped intelligent optical cable and the pipeline is not prone to occurring, and the wiring efficiency is improved. In addition, since the special-shaped intelligent optical cable and the pipeline are in surface contact, the lateral pressure resistance is improved, and the test precision and sensitivity are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical cables, and in particular to a special-shaped intelligent optical cable. Background Art

[0002] Distributed fiber optic sensing technology leverages the optical fiber's inherent ability to serve as both a signal transmission medium and a sensing unit to continuously measure the distribution of physical quantities such as vibration, strain, and temperature along the fiber, thereby enabling distributed long-distance measurement. Specifically, distributed fiber optic sensing technology exploits the properties of light waves propagating through optical fibers to continuously sense measurands (such as temperature, pressure, stress, and strain) along the length of the fiber. During transmission, the optical fiber serves as both the sensing medium and the transmission medium for the measured object. This allows for continuous measurement of environmental parameters distributed along the entire length of the fiber, while simultaneously capturing information about the spatial distribution of the measured object and its temporal variations.

[0003] Currently, distributed fiber optic sensing technology is used in a variety of monitoring scenarios, including structural deformation, traffic flow, vehicle type, pipeline leakage, and construction vibration. However, due to the complex cable laying environment, most monitored objects are circular pipes or cables, which do not fit tightly with existing sensor cables. Since both the sensor cables and the pipes are circular, they are prone to misalignment, resulting in low wiring efficiency. Furthermore, the contact area between the sensor cables and the pipes is small, making them prone to significant deformation, which affects the accuracy of monitoring results. Summary of the Invention

[0004] The purpose of the present invention is to provide a special-shaped intelligent optical cable to solve the problems that the sensor optical cable and the pipeline are not easy to fit tightly, the sensor cable wiring efficiency is low, and the sensor optical cable is easy to deform and affects the accuracy of the monitoring results.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a special-shaped intelligent optical cable, which includes:

[0007] Sensing cable core;

[0008] An inner sheath, wherein the cross section of the inner sheath is fan-shaped, the inner sheath comprises an outer curved surface, an inner curved surface, and two side surfaces, the outer curved surface and the inner curved surface are concentrically arranged, the two side surfaces are respectively used to connect the ends of the outer curved surface and the inner curved surface, and the sensing cable core is located in the inner sheath;

[0009] The outer protective layer at least covers the inner curved surface, and the outer protective layer is used to fit the outer wall of the object to be measured with the curved surface.

[0010] As an optimal technical solution for a special-shaped intelligent optical cable, the special-shaped intelligent optical cable includes a position sensor, and the position sensor is used to send a position signal to the outside world.

[0011] As an optimal technical solution for a special-shaped intelligent optical cable, the position sensor is arranged between the inner sheath and the outer sheath.

[0012] As a preferred technical solution for a special-shaped intelligent optical cable, the outer sheath is provided with a first mounting groove, and the position sensor is provided in the first mounting groove; or

[0013] The inner protective layer is provided with a second mounting groove, and the position sensor is arranged in the second mounting groove; or

[0014] The outer protective layer is provided with a first mounting groove, the inner protective layer is provided with a second mounting groove, the first mounting groove and the second mounting groove are surrounded by a mounting cavity, and the position sensor is arranged in the mounting cavity.

[0015] As an optimal technical solution for a special-shaped intelligent optical cable, the outer sheath is annular and has a uniform thickness at all locations. The outer sheath is circumferentially wrapped around the inner sheath. The special-shaped intelligent optical cable includes a position sensor, which is arranged between the outer sheath and the outer arc surface.

[0016] As an optimal technical solution for special-shaped intelligent optical cables, the position sensor is an electronic tag.

[0017] As an optimal technical solution for a special-shaped intelligent optical cable, the special-shaped intelligent optical cable includes a reinforcement member, and the reinforcement member is arranged inside the inner sheath.

[0018] As an optimal technical solution for a special-shaped intelligent optical cable, two reinforcement members are provided, and the two reinforcement members are dispersedly arranged on both sides of the sensing cable core along the working direction.

[0019] As an optimal technical solution for a special-shaped intelligent optical cable, the connecting line between the two reinforcement members is located on the side of the center of the sensing cable core close to the outer curved surface. When the special-shaped intelligent optical cable is fixed to the object to be measured, the distance between the two reinforcement members and the outer wall of the object to be measured is equal to the distance between the sensing cable core and the outer wall of the object to be measured.

[0020] As an optimal technical solution for a special-shaped intelligent optical cable, the sensing cable core includes an optical fiber, a tight jacket layer, an aramid layer and an armor layer which are sequentially sheathed from the inside to the outside.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides a special-shaped intelligent optical cable, which includes a sensing cable core and an inner sheath located outside the sensing cable core. The inner sheath has a fan-shaped cross-section. When the fan-shaped inner sheath is attached to a measured object having a curved surface, it can adhere to the curved outer wall of the measured object, making it less likely for the special-shaped intelligent optical cable and the measured object to be misaligned, thereby improving wiring efficiency. In addition, since the special-shaped intelligent optical cable and the measured object are in surface contact, the special-shaped intelligent optical cable can be guaranteed not to undergo significant deformation, which is conducive to ensuring the accuracy of the monitoring results. Finally, by coating the inner curved surface with an outer sheath, a certain protective effect can be provided to the inner curved surface, thereby improving the durability of the special-shaped intelligent optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the cross section of a special-shaped intelligent optical cable in an embodiment of the present invention.

[0024] In the picture:

[0025] X. Work direction;

[0026] 1. Sensing cable core; 11. Optical fiber; 12. Tight jacket layer; 13. Aramid layer; 14. Armor layer;

[0027] 2. Inner protective layer; 21. Outer arc surface; 22. Inner arc surface; 23. Side surface;

[0028] 3. Outer sheath;

[0029] 4. Position sensor;

[0030] 5. Reinforcement. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] like Figure 1 As shown, this embodiment provides a special-shaped intelligent optical cable, which includes a sensing cable core 1, an inner sheath 2, and an outer sheath 3. The sensing cable core 1 has a circular cross-section; the inner sheath 2 has a fan-shaped cross-section, and includes an outer arc surface 21, an inner arc surface 22, and two side surfaces 23. The outer arc surface 21 and the inner arc surface 22 are concentrically arranged, and the two side surfaces 23 are respectively used to connect the ends of the outer arc surface 21 and the inner arc surface 22. The sensing cable core 1 is located in the inner sheath 2; the outer sheath 3 at least covers the inner arc surface 22, and the outer sheath 3 is used to fit the outer wall of the object to be measured with a curved surface. In this embodiment, the object to be measured with a curved surface can be a pipe, a cable, or other objects with a curved surface structure, but is not limited thereto. In this embodiment, for ease of understanding, the pipe is used as an example for description.

[0036] The special-shaped intelligent optical cable includes a sensing cable core 1 and an inner sheath 2 located outside the sensing cable core 1. The cross-section of the inner sheath 2 is fan-shaped. When installed in a pipeline, the inner sheath 2 with a fan-shaped structure can fit the outer wall of the pipeline, making it less likely for the special-shaped intelligent optical cable and the pipeline to be misaligned, thereby improving wiring efficiency. In addition, since the special-shaped intelligent optical cable and the pipeline are in surface contact, the ability to resist lateral pressure is improved. The special-shaped intelligent optical cable can ensure that no major deformation occurs, which is conducive to ensuring the accuracy of the monitoring results. Finally, by coating the inner curved surface 22 with an outer sheath 3, a certain protective effect can be played on the inner curved surface 22, thereby improving the durability of the special-shaped intelligent optical cable. Since the special-shaped intelligent optical cable and the pipeline are in surface contact, the contact area with the pipeline is large, thereby ensuring a larger sensing area and improving test accuracy and sensitivity.

[0037] To facilitate the determination of the specific location of the abnormal point, in this embodiment, the special-shaped intelligent optical cable includes a position sensor 4, which is used to send a position signal to the outside world. To protect the position sensor 4, the position sensor 4 is arranged between the inner sheath 2 and the outer sheath 3.

[0038] Specifically, in the first embodiment, the outer sheath 3 is provided with a first mounting groove, within which the position sensor 4 is disposed. In the second embodiment, the inner sheath 2 is provided with a second mounting groove, within which the position sensor 4 is disposed. In the third embodiment, the outer sheath 3 is provided with a first mounting groove, and the inner sheath 2 is provided with a second mounting groove. The first and second mounting grooves form a mounting cavity, within which the position sensor 4 is disposed. This arrangement protects the position sensor 4 and ensures the smoothness of the outer surface of the outer sheath 3, thereby ensuring that the outer sheath 3 adheres to the pipe.

[0039] Position sensor 4 is an RFID (Radio Frequency Identification) tag. RFID tags offer a simple structure, low cost, and the ability to deform and conform to the environment, enabling intelligent management and maintenance of installed special-shaped intelligent optical cables. RFID tags are high-capacity tags composed of a coupling element and a chip. Each tag has a unique electronic code and user-programmable storage space. When attached to an object, they can identify the target.

[0040] In this embodiment, the special-shaped intelligent optical cable includes a reinforcement member 5, which is disposed within the inner sheath 2. The reinforcement member 5 is made of an aramid fiber-reinforced composite material or a rubber-plastic composite elastic material. Both aramid fiber-reinforced composite materials and rubber-plastic composite elastic materials have high flexibility and excellent bending resistance, thereby enhancing the strength of the special-shaped intelligent optical cable.

[0041] Specifically, two reinforcement members 5 are provided, and the two reinforcement members 5 are dispersedly arranged on both sides of the sensing cable core 1 along the working direction X. The dispersed arrangement of the two reinforcement members 5 can protect the sensing cable core 1 on both sides.

[0042] Taking into account the use ring and usage method of the special-shaped intelligent optical cable, the diameter of the inner arc surface 22 of the special-shaped intelligent optical cable is generally slightly larger than the diameter of the pipeline. When the special-shaped intelligent optical cable is installed in the pipeline, the special-shaped intelligent optical cable will undergo slight deformation after being fixed, so that the outer sheath 3 on the inner arc surface 22 of the special-shaped intelligent optical cable can completely fit the pipeline, thereby improving the firmness of the connection between the special-shaped intelligent optical cable and the pipeline.

[0043] To accommodate the above-mentioned usage method, in this embodiment, the line L between the two reinforcement members 5 is located on one side of the center of the sensing cable core 1, close to the outer arc surface 21. When the special-shaped intelligent optical cable is fixed to the pipeline, the distance between the two reinforcement members 5 and the outer wall of the pipeline is equal to the distance between the sensing cable core 1 and the outer wall of the pipeline. With the above-mentioned structural setting, when the outer sheath 3 on the inner arc surface 22 of the special-shaped intelligent optical cable can completely fit the pipeline, the center of the circle formed by the two reinforcement members 5 and the sensing cable core 1 coincides with the center of the pipeline. The above-mentioned setting enables the two reinforcement members 5 to be located on both sides of the sensing cable core 1, and when stretched, the force is more evenly distributed, which can better protect the sensing cable core 1.

[0044] In this embodiment, the outer sheath 3 is annular and has a uniform thickness throughout. The outer sheath 3 covers the circumference of the inner sheath 2. The special-shaped intelligent optical cable includes a position sensor 4, which is located between the outer sheath 3 and the outer curved surface 21. The above-mentioned structure is conducive to all-round protection of the inner sheath 2. In addition, because the pipeline is buried underground, when the special-shaped intelligent optical cable is installed on the upper side of the pipeline, the position sensor 4 is located closer to the ground, which facilitates detection.

[0045] In this embodiment, the sensing cable core 1 includes an optical fiber 11, a tight sleeve layer 12, an aramid layer 13, and an armor layer 14, which are sequentially arranged from the inside to the outside. Among them, the optical fiber 11 is a bend-insensitive optical fiber 11. The optical fiber 11 has a large information transmission capacity and high transmission efficiency. It has high performance in resisting bending, twisting, tension, and lateral pressure, a wide range of uses, and low line attenuation. The outer diameter of the tight sleeve layer 12 is 0.5 mm, and the material is ethylene-tetrafluoroethylene copolymer, which improves the compressive strength of the optical fiber 11. The material of the aramid yarn layer is full-para-aramid fiber, which ensures the long-term stability of the transmission characteristics of the optical fiber 11. The armor layer 14 is made of stainless steel fine wire or stainless steel hose. The materials of the inner sheath 2 and the outer sheath 3 are both low-smoke, halogen-free, flame-retardant thermoplastic polyurethane elastomer (TPU) sheath material, which has excellent high tension, high tensile strength, strong toughness and aging resistance. It is a sheath material with good elasticity, which strengthens the protection and support of the special-shaped intelligent optical cable, improves the softness and pressure resistance of the special-shaped intelligent optical cable, and meets the high elasticity requirements.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Special-shaped intelligent optical cable, characterized in that: include: Sensing cable core (1); An inner protective layer (2), wherein the cross section of the inner protective layer (2) is fan-shaped, the inner protective layer (2) comprises an outer curved surface (21), an inner curved surface (22) and two side surfaces (23), the outer curved surface (21) and the inner curved surface (22) are concentrically arranged, the two side surfaces (23) are respectively used to connect the two ends of the outer curved surface (21) and the inner curved surface (22), and the sensing cable core (1) is located in the inner protective layer (2); An outer protective layer (3) at least covers the inner curved surface (22), and the outer protective layer (3) is used to fit the outer wall of the object to be measured having a curved surface; The special-shaped intelligent optical cable comprises a reinforcement member (5), wherein the reinforcement member (5) is arranged inside the inner sheath (2); There are two reinforcement members (5), and the two reinforcement members (5) are dispersedly arranged on both sides of the sensing cable core (1) along the working direction (X); The connecting line between the two reinforcing members (5) is located on one side of the center of the sensing cable core (1) close to the outer arc surface (21); when the special-shaped intelligent optical cable is fixed to the object to be measured, the diameter of the inner arc surface (22) is larger than the diameter of the object to be measured; the distance between the two reinforcing members (5) and the outer wall of the object to be measured is equal to the distance between the sensing cable core (1) and the outer wall of the object to be measured; and the center of the circle formed by the two reinforcing members (5) and the sensing cable core (1) coincides with the center of the circle of the object to be measured.

2. The special-shaped intelligent optical cable according to claim 1, characterized in that: The special-shaped intelligent optical cable comprises a position sensor (4), and the position sensor (4) is used to send a position signal to the outside world.

3. The special-shaped intelligent optical cable according to claim 2, characterized in that: The position sensor (4) is arranged between the inner protective layer (2) and the outer protective layer (3).

4. The special-shaped intelligent optical cable according to claim 3, characterized in that: The outer protective layer (3) is provided with a first mounting groove, and the position sensor (4) is provided in the first mounting groove; or The inner protective layer (2) is provided with a second mounting groove, and the position sensor (4) is provided in the second mounting groove; or The outer protective layer (3) is provided with a first mounting groove, the inner protective layer (2) is provided with a second mounting groove, the first mounting groove and the second mounting groove are arranged to form a mounting cavity, and the position sensor (4) is arranged in the mounting cavity.

5. The special-shaped intelligent optical cable according to claim 3, characterized in that: The outer sheath (3) is annular and has a uniform thickness at all locations. The outer sheath (3) covers the circumference of the inner sheath (2). The special-shaped intelligent optical cable includes a position sensor (4). The position sensor (4) is arranged between the outer sheath (3) and the outer arc surface (21).

6. The special-shaped intelligent optical cable according to claim 2, characterized in that: The position sensor (4) is an electronic tag.

7. The special-shaped intelligent optical cable according to any one of claims 1 to 6, characterized in that: The sensing cable core (1) comprises an optical fiber (11), a tight jacket layer (12), an aramid layer (13), and an armor layer (14) which are sequentially sleeved from the inside out.

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