A remote inspection optical cable and its detection method

Abstract

The present invention discloses a remotely inspectable optical cable and a detection method thereof, which belongs to the field of optical cable preparation technology. The optical cable comprises an optical unit, an outer sheath arranged on the periphery of the optical unit, and an induction electric unit arranged between the optical unit and the outer sheath. The induction electric unit will contact the external environment when the outer sheath is damaged. The remotely inspectable optical cable of the present invention is configured by arranging the induction electric unit in the outer sheath of the optical cable. When the conductor of the induction electric unit is exposed to the outside due to damage to the outer sheath, a pulse signal is input into the conductor through a TDR instrument. Since other undamaged parts form an insulation section under the protection of the outer sheath, and the damaged part of the conductor is in direct contact with the air to form a conductive state, the insulating medium properties of the induction electric unit change, thereby affecting the propagation speed and reflection waveform of the pulse signal at the damaged position. The staff can quickly obtain the damaged part of the optical cable through the change position of the reflected waveform, which greatly reduces the inspection time of the damaged part of the optical cable.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical cable preparation, and in particular relates to an optical cable capable of remote inspection and a detection method thereof. Background Art

[0002] With the continuous development of fiber optic communication technology, people have put forward higher and higher requirements for information transmission efficiency and stability. With the gradual strengthening of environmental protection awareness, the domestic ecological environment has also been greatly improved. In outdoor environments, more and more rodents and birds are biting cables, which can easily cause communication interruptions.

[0003] In existing optical cable manufacturing and design, the sheath is typically armored to prevent damage. However, when the sheath is damaged, it's often not detected until the fiber is severed, leading to signal loss. This interruption in communication can cause significant losses, and inspections covering tens of kilometers of cable strips require significant manpower and resources to locate the damaged cable and perform repairs and remediation, significantly increasing the time and cost of restoring communications. Summary of the Invention

[0004] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a remotely inspectable optical cable to solve the problem that the damaged portion of the existing optical cable is not discovered in time after the sheath is bitten through.

[0005] To achieve the above object, the present invention provides a remotely inspectable optical cable, comprising:

[0006] An optical unit, an inductive electric unit and an outer sheath, wherein the optical unit and the inductive electric unit are both arranged in the outer sheath, and the inductive electric unit contacts the external environment when the outer sheath is damaged.

[0007] As a further improvement of the present invention, the induction electrical unit includes a bare wire, the outer periphery of the bare wire is coated with an insulating layer, and the insulating layer is soluble in an alkaline solution after being exposed to light for a set time.

[0008] As a further improvement of the present invention, the insulating layer is filled with 2,1,5-sulfonyl chloride and sodium hydroxide powder.

[0009] As a further improvement of the present invention, the insulating layer is filled with 2,1,5-sulfonyl chloride, and the space between the outer sheath and the induction unit is filled with sodium hydroxide powder.

[0010] As a further improvement of the present invention, it also includes:

[0011] Strengthening core;

[0012] There are multiple light units, and the multiple light units are twisted and wound around the outer periphery of the reinforcing core;

[0013] The inductive electric unit is twisted and wound around the outer peripheries of the plurality of optical units.

[0014] As a further improvement of the present invention, the conductive wires of the induction electric unit do not contact each other along the axis of the reinforcing core.

[0015] As a further improvement of the present invention, it also includes:

[0016] Strengthening core;

[0017] There are a plurality of optical units, and the inductive electrical unit is twisted together with the plurality of optical units and is disposed on the periphery of the reinforcing core.

[0018] As a further improvement of the present invention, the optical unit includes at least one optical fiber, the outer periphery of the optical fiber is covered with a sleeve, and the DuPont hardness value of the sleeve is 30-85.

[0019] As a further improvement of the present invention, the wire is made of one of gold, silver, copper or aluminum.

[0020] The present application also includes a method for detecting a remotely inspectable optical cable, which is used to detect damage to the remotely inspectable optical cable, and comprises:

[0021] Use TDR instrument to input pulse signal to the induction unit;

[0022] Obtain the propagation time and reflection waveform of the pulse signal in the cable;

[0023] Whether the optical cable is damaged can be remotely inspected based on the reflected waveform, and the damaged position of the optical cable can be remotely inspected based on the propagation time.

[0024] The present application also includes a method for preparing an optical cable capable of remote inspection, which comprises the following steps:

[0025] S1, obtaining light units and induced electrical units;

[0026] S2, pulling the reinforcing core, twisting the plurality of optical units and setting them on the periphery of the reinforcing core, and twisting the induction electric units and setting them on the periphery of the plurality of reinforcing cores;

[0027] S3. Extrude an outer sheath around the reinforcing core.

[0028] As a further improvement of the present invention, the induction electric unit preparation process is as follows:

[0029] Dissolve 2,1,5-sulfonyl chloride and phenolic resin in anhydrous ethanol to form a coating solution;

[0030] Selecting a wire and dipping the wire into the coating solution;

[0031] The conductor is dried by a hot air device to obtain an induction electric unit with an insulating layer.

[0032] As a further improvement of the present invention, the step S2 further includes: spraying sodium hydroxide powder on the periphery of the twisted induction electric unit.

[0033] As a further improvement of the present invention, the mass ratio of the 2,1,5-sulfonyl chloride to the phenolic resin is 1:2-5; and the sodium hydroxide powder accounts for 3%-10% of the total mass of the insulating layer.

[0034] As a further improvement of the present invention, the induction electric unit preparation process is as follows:

[0035] traction wire;

[0036] High-density polyethylene is used as the base material, and 2,1,5-sulfonyl chloride and sodium hydroxide powder are added to the base material to form a casing material;

[0037] Extruding a sleeve around the outer periphery of the conductor;

[0038] The sleeve is cooled and shaped by air cooling.

[0039] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0040] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0041] (1) The remote inspection optical cable of the present invention is configured by setting an induction unit in the outer sheath of the optical cable. When the conductor of the induction unit is damaged and contacts the outside, a pulse signal is input into the conductor through a TDR instrument. Since the other undamaged parts form an insulation section under the protection of the outer sheath, and the damaged part of the conductor is in direct contact with the air to form a conductive state, it will cause the properties of the insulating medium at the damaged part to change, that is, the relative dielectric constant to change, thereby affecting the propagation speed and reflection waveform of the pulse signal at the damaged position. The staff can quickly obtain the damaged part of the optical cable through the change position of the reflection waveform, which greatly reduces the inspection time of the damaged part of the optical cable and improves the recovery efficiency of communication. At the same time, when the communication is not interrupted, the exposed conductor can also detect the damaged part of the optical cable, so that the damaged part of the optical cable can be repaired in advance, avoiding the situation where the damaged position of the traditional optical cable can only be known when the communication is interrupted.

[0042] (2) The remotely inspectable optical cable of the present invention twists the inductive electric unit with the optical unit, or twists the inductive electric unit and arranges it on the periphery of the optical unit, so that no matter where the optical cable is damaged, the inductive electric unit will be exposed to the outside corresponding to the damage, causing the properties of the insulating medium at the damaged part to change, ensuring that when the optical cable is damaged, the damaged part can be detected accordingly, thereby achieving efficient and accurate detection of the damaged part of the optical cable.

[0043] (3) The remotely inspectable optical cable of the present invention controls the twisting pitch of the inductive electrical unit so that the conductors of the inductive electrical unit do not contact each other along the axial direction of the reinforcing core, thereby avoiding the influence of the reflected waveform caused by the contact of the surrounding conductors, thereby ensuring the accuracy of the detection of damaged parts of the optical cable.

[0044] (4) The remote inspection optical cable of the present invention is made by filling 2,1,5-sulfonyl chloride and sodium hydroxide powder in the insulating layer of the inductive electric unit, or filling 2,1,5-sulfonyl chloride in the insulating layer and sodium hydroxide powder in the space between the outer sheath and the inductive electric unit. When the outer sheath of the optical cable is damaged, the 2,1,5-sulfonyl chloride in the insulating layer reacts to form ketene under light, and the sodium hydroxide powder absorbs moisture in the air to form weak alkaline water. The ketene and water form indene carboxylic acid and dissolve in the weak alkaline water, causing the insulation layer of the wire at the corresponding part to disappear, thereby causing the properties of the insulating medium at the part to change, so that it can be sensed by the TDR instrument, and then the damaged part of the optical cable is obtained. At the same time, the insulating layer on the periphery of the inductive electric unit can completely prevent the inductive electric unit from contacting along the axial direction of the reinforced core, and prevent the inductive electric unit surrounding the optical unit from contacting during the contraction process of the optical cable, thereby ensuring the accuracy of the TDR instrument detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic structural diagram of a remotely inspectable optical cable according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic structural diagram of a remotely inspectable optical cable according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of an optical cable capable of remote inspection according to an embodiment of the present invention.

[0048] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. optical fiber; 2. casing; 3. reinforcing core; 4. inductive electric unit; 5. outer sheath. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element 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.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0054] Example:

[0055] See also Figures 1 to 3 The remotely inspectable optical cable in a preferred embodiment of the present invention includes an optical unit and an outer sheath 5 arranged on the outer periphery of the optical unit. An inductive electric unit 4 is also provided between the optical unit and the outer sheath 5. When the outer sheath 5 is damaged, the wires of the inductive electric unit 4 will directly contact the external environment.

[0056] The remotely inspectable optical cable of the present invention is configured by arranging an induction electric unit 4 within the outer sheath 5 of the optical cable. When the wire of the induction electric unit 4 is damaged and exposed to the outside of the outer sheath 5, a pulse signal is input into the wire through a TDR instrument. Since other undamaged parts form an insulation section under the protection of the outer sheath 5, and the damaged part of the wire is in direct contact with the air to form a conductive state, it will cause the properties of the insulating medium at the damaged part to change, thereby affecting the propagation speed and reflection waveform of the pulse signal at the damaged position. The staff can quickly obtain the damaged part of the optical cable through the changed position of the reflected waveform, which greatly reduces the inspection time of the damaged part of the optical cable and improves the communication recovery efficiency.

[0057] Preferably, the induction electrical unit 4 in the present application can be a bare wire, which can be buried in the outer sheath 5, or placed in the outer sheath 5 together with the optical unit; optionally, the outer periphery of the wire can also be coated with a protective layer, which needs to be quickly removed when the optical cable is damaged to ensure that the wire is in contact with the outside air, thereby causing changes in the properties of the insulating medium.

[0058] Furthermore, the induction electric unit 4 in this application contacts the external environment when the outer sheath 5 is damaged, which means that after the outer sheath 5 is damaged, the induction electric unit 4 is exposed to the external environment, such as contact with external air, moisture in the external air, external rainwater, etc.

[0059] Specifically, as an optional embodiment of the present invention, the remotely inspectable optical cable in this application also includes a reinforcing core 3. The above-mentioned optical units are multiple, and the multiple optical units are twisted and arranged on the periphery of the reinforcing core 3. The inductive electric unit 4 is also twisted and arranged on the periphery of the optical unit. The reinforcing core 3 is used to strengthen the tensile strength of the optical cable, reduce the axial shrinkage excess length of the optical cable, and avoid the inductive electric unit 4 from axially telescoping contact, which causes the TDR instrument to be unable to accurately perceive the changes in the reflected waveform. At the same time, the inductive electric unit 4 twisted and arranged on the periphery of the optical unit serves as the outer layer structure of the optical unit. When the optical unit is damaged, the inductive electric unit 4 will inevitably be damaged, and the TDR instrument can quickly detect the damaged part.

[0060] Furthermore, the present application controls the twist pitch of the induction electric unit 4 so that the conductors of the induction electric unit 4 do not contact each other along the axial direction of the reinforcing core 3. When the induction electric unit 4 is a bare conductor, once the outer sheath 5 is damaged, the conductor can directly contact the outside air, resulting in a change in the properties of the insulating medium, ensuring that the TDR instrument accurately perceives the damaged part. However, correspondingly, when the conductor is completely exposed, due to the change in the axial expansion and contraction length of the optical cable, the conductors may contact each other in the axial direction of the reinforcing core 3, resulting in inaccurate reflection waveforms detected by the TDR instrument, affecting the detection of damaged parts of the optical cable. Therefore, it is necessary to control the twist pitch of the induction electric unit 4 to ensure that the conductors of the induction electric unit 4 do not contact each other along the axial direction of the reinforcing core 3.

[0061] As another optional embodiment of the present invention, the remotely inspectable optical cable of this application includes a reinforcing core 3, with the aforementioned optical unit and inductive electric unit 4 twisted together and arranged around the outer periphery of the reinforcing core 3. The inductive electric unit 4 is arranged in a manner similar to a filler rope and twisted together with the optical unit. Because the inductive electric unit 4 is twisted and arranged in a circumferential manner, if any portion of the outer sheath 5 of the optical cable is damaged, the inductive electric unit 4 is exposed at the corresponding portion, thereby accurately detecting the damaged portion.

[0062] Furthermore, as a preferred embodiment of the present invention, the inductive electrical unit 4 in the present application includes a bare wire, and the outer periphery of the bare wire is coated with an insulating layer, which is soluble in an alkaline solution after being exposed to light for a set time. When the outer sheath 5 of the optical cable is damaged, the damage is mainly sensed by the inductive electrical unit 4. Therefore, it is not appropriate to set a protective layer around the outer periphery of the wire to avoid the problem that the protective layer is not damaged after the outer sheath 5 is damaged, resulting in the problem that the damaged part cannot be detected. The exposed wire will cause the surrounding wires to contact each other, causing TDR perception errors. Therefore, the present application coats an insulating layer on the outer periphery of the bare wire and controls the composition of the insulating layer so that the insulating layer dissolves quickly when it comes into contact with the outside, thereby ensuring that the wire accurately perceives the external air. Preferably, the illumination in the present application includes ultraviolet light in the 220-500nm band. Preferably, the set time in this application is adjustable according to the thickness of the insulating layer, and can be selected as 2h, 3h or 4h, etc. Preferably, when the illumination time is 4h or more, the insulating layer in the illuminated area is basically completely dissolved in the alkaline solution, so that the damage of the induction electrical unit can be detected.

[0063] Optionally, the alkaline solution in this application is formed by filling the sheath or the insulation layer with alkaline substances such as soda lime, calcium oxide, calcium hydroxide, sodium oxide, sodium hydroxide, potassium oxide, potassium hydroxide, lithium oxide, or lithium hydroxide, or substances that become alkaline after absorbing water, and absorbing water from the air to form an alkaline solution. Specifically, soda lime is a mixture that includes approximately 75% calcium oxide, approximately 3% sodium hydroxide, and approximately 1% potassium hydroxide. In the remotely inspectable optical cable in this application, the sodium hydroxide powder added to the optical cable can be replaced with the above-mentioned alkaline substances or substances that become alkaline after absorbing water.

[0064] Furthermore, as an optional embodiment of the present invention, the insulating layer in this application is filled with 2,1,5-sulfonyl chloride and sodium hydroxide powder. When the outer sheath 5 of the optical cable is damaged, the 2,1,5-sulfonyl chloride in the insulating layer reacts under light to form ketene, while the sodium hydroxide powder absorbs moisture from the air to form weak alkaline water. The ketene reacts with water to form indene carboxylic acid, which dissolves in the weak alkaline water, causing the insulation layer of the wire at the corresponding part to disappear, thereby causing the properties of the insulating medium in that part to change, which can be sensed by the TDR instrument, thereby obtaining the damaged part of the optical cable.

[0065] Furthermore, as an optional embodiment of the present invention, the insulating layer is filled with 2,1,5-sulfonyl chloride, and the space between the outer sheath 5 and the inductive element 4 is filled with sodium hydroxide powder. The insulating layer is filled only with 2,1,5-sulfonyl chloride, and then the sodium hydroxide powder between the outer sheath 5 and the inductive element 4 absorbs water to form weak alkaline water, which dissolves the insulating layer and exposes the wire.

[0066] Furthermore, as an optional embodiment of the present invention, the induction unit 4 is also a bare conductor, but the outer periphery of the bare conductor is coated with a mesh insulation layer. Here, the mesh insulation layer has a certain thickness to prevent direct contact between adjacent bare conductors and allow some bare conductors to directly contact the outside air after the outer sheath 5 is damaged. Optionally, the mesh insulation layer can be a foam material.

[0067] As an optional embodiment of the present invention, the remotely inspectable optical cable in the present application may be a stranded cable, a skeleton cable, a central tube cable or an air-blown micro cable.

[0068] Further preferably, the optical unit in the present application includes at least one optical fiber 1, the outer periphery of which is coated with a sleeve 2, and the DuPont hardness of the sleeve 2 is between 30 and 85. Since the bare conductor itself is relatively thin, in order to prevent the sleeve 2 from being directly cut by the bare conductor, a sleeve 2 with a DuPont hardness between 30 and 85 is used to effectively protect the optical fiber 1 inside. Optionally, the sleeve 2 in the present application can be made of one of PP, PBT, TPEE, or PET, or can be made of a blend of PBT or PET, as long as the sleeve 2 made of the above materials meets the hardness requirements.

[0069] Furthermore, as a preferred embodiment of the present invention, the wire in the present application can be made of one or more materials selected from copper, gold, silver, aluminum, semiconductors, or superconductors. The wire in the present application only needs to be conductive when tested with a TDR instrument.

[0070] Based on the above-mentioned remotely inspectable optical cable, the present application also includes a method for preparing the remotely inspectable optical cable, which comprises the following steps:

[0071] S1, obtaining light unit and induction electric unit 4;

[0072] S2, pulling the reinforcing core 3, twisting multiple optical units and setting them on the periphery of the reinforcing core 3, and twisting the induction electric units 4 and setting them on the periphery of multiple reinforcing cores 3;

[0073] S3. Extruding an outer sheath 5 on the outer periphery of the reinforcing core 3.

[0074] Furthermore, the preparation process of the above-mentioned induction electric unit 4 is as follows:

[0075] Dissolve 2,1,5-sulfonyl chloride and phenolic resin in anhydrous ethanol to form a coating solution;

[0076] Selecting a wire and immersing the wire in the coating solution;

[0077] The wire is dried by using a hot air device to obtain an induction electric unit 4 with an insulating layer.

[0078] When the wire is dried by the hot air device, the anhydrous ethanol is volatilized, and the phenolic resin containing 2,1,5-sulfonyl chloride is coated on the outer periphery of the wire to form the inductive electrical unit 4 with an insulating layer.

[0079] Furthermore, the insulating layer containing 2,1,5-sulfonyl chloride needs to be dissolved upon contact with a weak alkaline solution, so it is necessary to spray sodium hydroxide powder on the periphery of the twisted induction unit 4. It is worth noting that after the sodium hydroxide powder is sprayed on the periphery of the induction unit 4, a water-blocking yarn or water-blocking tape can be directly wrapped around the periphery of the sodium hydroxide powder to prevent the sodium hydroxide from absorbing moisture from the air and directly forming a weak alkaline solution.

[0080] Optionally, the induction electrical unit 4 with an insulating layer and the twisting with the optical unit in the present application are both carried out in a confined space. After the twisting is completed and after spraying sodium hydroxide powder, the water-blocking yarn is twisted and coated at the outlet end of the confined space to block external light and air.

[0081] Further preferably, the mass ratio of the 2,1,5-sulfonyl chloride to the phenolic resin is 1:2-5, and the sodium hydroxide powder comprises 3%-10% of the total mass of the insulation layer. Specifically, a mass ratio of 2,1,5-sulfonyl chloride to the phenolic resin of 1:2-5 results in a substantially complete breakdown of the insulation layer around the conductor after the 2,1,5-sulfonyl chloride reacts, facilitating TDR detection of the breakage. The sodium hydroxide powder comprises 3%-10% of the total mass of the insulation layer, ensuring that the sodium hydroxide, when it absorbs water to form an alkaline solution, dissolves the enone formed by the 2,1,5-sulfonyl chloride.

[0082] Furthermore, as an optional embodiment of the present invention, the preparation process of the induction unit 4 in this application is as follows:

[0083] traction wire;

[0084] High-density polyethylene is used as a base material, and 2,1,5-sulfonyl chloride and sodium hydroxide powder are added to the base material to form a sleeve 2 material;

[0085] Extruding a sleeve 2 around the outer periphery of the conductor;

[0086] The sleeve 2 is cooled and shaped by air cooling.

[0087] In addition to the composite structure of phenolic resin and 2,1,5-sulfonyl chloride formed on the periphery of the wire, a sleeve 2 structure containing 2,1,5-sulfonyl chloride and sodium hydroxide powder can also be directly prepared on the periphery of the wire.

[0088] Furthermore, the present application also includes a detection method for remotely inspecting optical cables, which is used to detect damage to the remotely inspected optical cables in the present application, as follows:

[0089] A TDR instrument is used to input a pulse signal to the induction unit 4;

[0090] Obtain the propagation time and reflection waveform of the pulse signal in the cable;

[0091] Whether the optical cable is damaged can be remotely inspected based on the reflected waveform, and the damaged position of the optical cable can be remotely inspected based on the propagation time.

[0092] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A remote inspection optical cable, characterized in that: include: an optical unit, an inductive electric unit, and an outer sheath, wherein the optical unit and the inductive electric unit are both disposed within the outer sheath, and the inductive electric unit contacts the external environment when the outer sheath is damaged; The induction unit includes a bare wire, the outer periphery of which is coated with an insulating layer, and the insulating layer is soluble in an alkaline solution after being exposed to light for a set time; The insulating layer is filled with 2,1,5-sulfonyl chloride and sodium hydroxide powder; or, The insulating layer is filled with 2,1,5-sulfonyl chloride, and the space between the outer sheath and the induction unit is filled with sodium hydroxide powder.

2. The remotely inspectable optical cable according to claim 1, characterized in that: Also includes: Strengthening core; There are multiple light units, and the multiple light units are twisted and wound around the outer periphery of the reinforcing core; The inductive electric unit is twisted and wound around the outer peripheries of the plurality of optical units.

3. The remotely inspectable optical cable according to claim 2, characterized in that: The conductive wires of the induction electric unit do not contact each other along the axial direction of the reinforcing core.

4. The remotely inspectable optical cable according to claim 1, characterized in that: Also includes: Strengthening core; There are a plurality of optical units, and the inductive electrical unit is twisted together with the plurality of optical units and is disposed on the periphery of the reinforcing core.

5. The remotely inspectable optical cable according to claim 1, characterized in that: The optical unit includes at least one optical fiber, the outer periphery of the optical fiber is covered with a sleeve, and the DuPont hardness value of the sleeve is 30-85.

6. The remotely inspectable optical cable according to claim 1, characterized in that: The wire is made of gold, silver, copper or aluminum.

7. A method for detecting a remotely inspectable optical cable, for detecting damage to the remotely inspectable optical cable as claimed in any one of claims 1 to 6, characterized in that: include: Use TDR instrument to input pulse signal to the induction unit; Obtain the propagation time and reflection waveform of the pulse signal in the cable; Whether the optical cable is damaged can be remotely inspected based on the reflected waveform, and the damaged position of the optical cable can be remotely inspected based on the propagation time.

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