Photoelectric composite cable for tethered unmanned aerial vehicle

Abstract

The application discloses a kind of photoelectric composite cable for tethered unmanned aerial vehicle, comprising: electric unit, including several wire core, wire core includes from inside to outside tinned copper clad steel center layer, tinned copper clad aluminum secondary outer layer, tinned copper outermost layer and first insulating layer, the outer periphery of tinned copper outermost layer is extruded and covered first insulating layer;Communication unit, twisted with wire core, communication unit includes protective inner sleeve and several optical fiber cables twisted in protective inner sleeve, optical fiber cable includes built-in communication optical fiber and outer periphery of communication optical fiber is wrapped with inner insulating layer, outer insulating layer;Filler layer, filled in the gap between electric unit and communication unit;And outer periphery sheath, cover and wrap the outer periphery of electric unit, communication unit and filler layer, outer periphery sheath and filler layer are wound with non-woven fabric.This application meets the use requirement of tethered unmanned aerial vehicle, can transmit direct current, can also transmit communication data information, with lighter unit length and better tensile strength.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric composite cables, in particular to a photoelectric composite cable for a tethered unmanned aerial vehicle. BACKGROUND

[0002] The tethered unmanned aerial vehicle is realized by combining the unmanned aerial vehicle and the tethered comprehensive cable, and is mainly applied to uninterrupted air monitoring and emergency communication for a long time, can carry special visible light cameras and infrared thermal imagers, and can also carry special emergency communication relay equipment. At present, the tethered machine has been widely applied in many professional fields such as military, fire fighting, oil, ocean, surveying and mapping, transportation and scientific research.

[0003] As the cable for conveying electric energy and information for the tethered unmanned aerial vehicle, it plays a very important role in the whole system, for example, the requirements of softness, twist resistance, lightweight, high conductivity, high strength, stable transmission signal, fatigue resistance and the like of the cable, the Chinese invention patent with publication number CN211879079U discloses a high-temperature-resistant lightweight photoelectric composite cable for unmanned aerial vehicles, which comprises an outer sheath, six electric units, one optical unit and a cabled aramid filling unit are arranged in the outer sheath, the electric unit comprises a plurality of twisted copper conductors and an electric unit insulating sleeve arranged outside the plurality of twisted copper conductors, the optical unit comprises a high-temperature-resistant optical fiber, an optical unit tight wrapping sleeve arranged outside the high-temperature-resistant optical fiber, an aramid protective layer arranged outside the optical unit tight wrapping sleeve and an optical unit sheath arranged outside the aramid protective layer. The composite form of the cable and the optical cable not only can meet the power input, but also can meet the high-frequency and high-quality signal transmission in the case of poor wireless signal. However, the cable softness in the technical solution is not high, and cannot resist twisting, and the optical cable is mainly treated for high temperature resistance, and the performance of anti-extrusion and anti-interference is not realized.

[0004] Based on the above technical problems, the present application aims to develop a high-strength lightweight tethered photoelectric composite cable, which is composed of new materials, new structures and new technologies, and is a lightweight, high-strength, high-conductivity and anti-interference tethered photoelectric composite cable, and each performance meets the requirements of the tethered unmanned aerial vehicle cable. SUMMARY

[0005] The present application aims to provide a high-strength lightweight tethered photoelectric composite cable for unmanned aerial vehicles, which is composed of new materials, new structures and new technologies, and is a lightweight, high-strength, high-conductivity and anti-interference tethered photoelectric composite cable, and each performance meets the requirements of the tethered unmanned aerial vehicle cable.

[0006] To achieve the above object, the application provides an optical-electric composite cable for a tethered unmanned aerial vehicle, comprising: an electric unit, comprising a plurality of cores, the core comprising, from inside to outside, a tin-coated copper-coated steel (TCCS) center layer, a tin-coated copper-coated aluminum (TCAA) secondary outer layer, a tin-coated copper (TS) outermost layer, and a first insulating layer, the outer periphery of the tin-coated copper (TS) outermost layer being extruded with the first insulating layer; a communication unit twisted with the core, the communication unit comprising a protective inner sleeve and a plurality of optical fiber cables twisted in the protective inner sleeve, the optical fiber cable comprising an embedded communication optical fiber and an inner insulating layer and an outer insulating layer wrapped around the outer periphery of the communication optical fiber; a filling layer filled in the gap between the electric unit and the communication unit; and an outer periphery sheath covering and wrapping the outer periphery of the electric unit, the communication unit, and the filling layer, and a non-woven fabric being wound between the outer periphery sheath and the filling layer.

[0007] According to the embodiments of the application, the cross-sectional area of the tin-coated copper-coated steel (TCCS) center layer accounts for 12% of the cross-section of a single core, the cross-sectional area of the tin-coated copper-coated aluminum (TCAA) secondary outer layer accounts for 46% of the cross-section of a single core, and the cross-sectional area of the tin-coated copper (TS) outermost layer accounts for 42% of the cross-section of a single core.

[0008] According to the embodiments of the application, the tin-coated copper-coated steel (TCCS) center layer is twisted with tin-coated copper-coated steel (TC) fine filaments at a small pitch, the tin-coated copper-coated aluminum (TCAA) secondary outer layer is twisted with tin-coated copper-coated aluminum fine filaments at a small pitch, and the tin-coated copper (TS) outermost layer is twisted with tin-coated copper fine filaments at a small pitch.

[0009] According to the embodiments of the application, the first insulating layer is a polyurethane (TPE) insulating layer.

[0010] According to the embodiments of the application, the outer periphery sheath is a polyurethane (TPE) outer sheath.

[0011] According to the embodiments of the application, the inner insulating layer is a high-density polyethylene (HDPE) inner insulating layer, and the outer insulating layer is a polytetrafluoroethylene (F46) outer insulating layer.

[0012] According to the embodiments of the application, the protective inner sleeve of the communication unit is a polytetrafluoroethylene (F46) inner sheath.

[0013] According to the embodiments of the application, the gaps between the plurality of optical fiber cables are filled with high-strength aramid.

[0014] According to the embodiments of the application, the filling layer is filled with aramid.

[0015] According to the embodiments of the application, the communication unit comprises four communication optical fiber cables.

[0016] The beneficial effects of the technical scheme of the application relative to the prior art are:

[0017] 1.The cable conductor in the present application adopts a plurality of metal materials to mix a small pitch bundle, a flexible polyurethane insulation layer is extruded and wrapped outside the bundle conductor to form a conductive core, a plurality of cores are used to form a cable with a communication unit according to needs, high-strength aramid is filled in the gap of the cable core, and non-woven fabric is wrapped around the cable core to stabilize the cable core, and then a flexible polyurethane sheath layer is extruded and wrapped outside the cable core to form a high-strength light tethered photoelectric composite cable for unmanned aerial vehicles, which meets the use requirements of the tethered unmanned aerial vehicle, can transmit direct current and communication data information, has a relatively light unit length and a good tensile strength, and has the characteristics of softness, torsion resistance, light weight, high conductivity, high strength, anti-interference, fatigue resistance and the like.

[0018] 2.The photoelectric composite cable provided by the present application, wherein the conductor of the power unit adopts three kinds of fine wire small pitch bundle of tin-plated copper clad steel, tin-plated copper clad aluminum and tin-plated copper, wherein the tin-plated copper clad steel layer is used as a center layer and accounts for 12% of the cross section of a single conductive core, the tin-plated copper clad aluminum layer is used as a secondary outer layer and is wrapped outside the tin-plated copper clad steel layer and accounts for 46% of the cross section of a single conductive core, and the tin-plated copper layer is used as an outermost layer and is wrapped outside the tin-plated copper clad steel layer and accounts for 42% of the cross section of a single conductive core, and a polyurethane insulation layer is extruded and wrapped around the conductor, which has the advantages of stable structure, light weight, high strength and excellent conductivity compared with a pure copper core.

[0019] 3.The photoelectric composite cable provided by the present application, wherein the communication unit adopts an optical fiber as a carrier, high-density polyethylene is used as inner insulation outside the optical fiber, and perfluoroethylene propylene is used as outer insulation, and then a plurality of cores are used to form a cable according to design needs, high-strength aramid is filled in the gap of the cable core, and perfluoroethylene propylene is extruded and wrapped as an inner sheath, which has the advantages of stable structure, high strength, anti-extrusion and anti-interference. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a photoelectric composite cable for a tethered unmanned aerial vehicle according to the present application;

[0021] Figure 2 FIG. 2 is a structural schematic diagram of a power unit according to the present application.

[0022] The reference signs are explained as follows:

[0023] 10.a power unit, 11.a tin-plated copper clad steel (TCCS) center layer, 12.a tin-plated copper clad aluminum (TCAA) secondary outer layer, 13.a tin-plated copper (TS) outermost layer, 14.a first insulation layer, 20.a communication unit, 21.an optical fiber cable, 22.a protective inner sheath, 30.a filling layer, 31.non-woven fabric, 40.an outer sheath, 211.a communication optical fiber, 212.an outer insulation layer, and 213.an inner insulation layer. DETAILED DESCRIPTION

[0024] The application will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are used to illustrate the application, but are not used to limit the scope of the application.

[0025] Please refer to Figure 1 and Figure 2 As shown in the drawings, an optical and electrical composite cable for a tethered unmanned aerial vehicle is shown, which includes an electrical unit 10 and a communication unit 20, both of which are covered and wrapped in an outer sheath 40, and the gap between the electrical unit 10 and the communication unit 20 is filled with high-strength aramid fiber, the electrical unit 10 adopts a small pitch bundle of a mixture of multiple metal materials, and the conductor of the bundle is extruded with a layer of flexible polyurethane (TPE) insulation layer; the communication unit 20 adopts optical fiber as the carrier, and the optical fiber cable 21 is extruded with a double-layer insulation layer on the outer periphery. Compared with the prior art, the optical and electrical composite cable of the application meets the requirements of softness, torsion resistance, light weight, high conductivity, high strength, stable transmission signal, fatigue resistance and the like for the tethered unmanned aerial vehicle, can transmit direct current and communication data information, has relatively light unit length and good tensile strength.

[0026] In this embodiment, the electrical unit 10 includes a plurality of cores, which include, from inside to outside, a TCSS center layer 11, a TCAA secondary outer layer 12, a TS outermost layer 13, and a first insulation layer 14, and the outer periphery of the TS outermost layer 13 is extruded with the first insulation layer 14.

[0027] Specifically, the core is a cable conductor that adopts a small pitch bundle of a mixture of multiple metal materials, and the conductor of the bundle is extruded with a layer of flexible polyurethane (TPE) insulation layer. As shown in Figure 2 The TCSS center layer 11 is made of a small pitch bundle of tin-plated copper-coated steel filaments, and the cross section is in the shape of a flower; the TCAA secondary outer layer 12 is made of a small pitch bundle of tin-plated copper-coated aluminum filaments, and the cross section of the TCAA secondary outer layer 12 is in the shape of a ring wrapping the outer periphery of the flower; the TS outermost layer 13 is made of a small pitch bundle of tin-plated copper filaments, and the TS outermost layer 13 is in the shape of a ring wrapping the outer periphery of the TCAA secondary outer layer 12. The overall structure is compact and stable.

[0028] Specifically, the cross-sectional area of the TCSS center layer 11 accounts for 12% of the cross-sectional area of a single core, the cross-sectional area of the TCAA secondary outer layer 12 accounts for 46% of the cross-sectional area of a single core, and the cross-sectional area of the TS outermost layer 13 accounts for 42% of the cross-sectional area of a single core. Such a proportion design makes the structure stable, relatively light in weight, high in strength, and excellent in conductivity.

[0029] Specifically, the first insulating layer 14 is a polyurethane (TPE) insulating layer, and the outer peripheral sheath 40 is a polyurethane (TPE) outer sheath. The polyurethane (TPE) material has excellent insulating impedance performance, a wide processing temperature range, and excellent heat resistance, and has wide application prospects and great potential in the field of electric wires and cables, meeting the high requirements of unmanned aerial vehicle cables.

[0030] In the embodiment, the communication unit 20 is twisted with the core, and the communication unit 20 includes a protective inner sheath 22 and a plurality of optical fiber cables 21 twisted in the protective inner sheath 22. The optical fiber cable 21 includes a built-in communication optical fiber 211 and an inner insulating layer 213 and an outer insulating layer 212 wrapped around the outer periphery of the communication optical fiber 211.

[0031] Specifically, the inner insulating layer 213 is a high-density polyethylene (HDPE) inner insulating layer, and the outer insulating layer 212 is a polytetrafluoroethylene (F46) outer insulating layer.

[0032] Specifically, the protective inner sheath 22 of the communication unit 20 is a polytetrafluoroethylene (F46) inner sheath.

[0033] Specifically, the gaps between the plurality of optical fiber cables 21 are filled with high-strength aramid.

[0034] Specifically, the communication unit 20 can include 4 communication optical fiber 211 cables 21, and the communication unit 20 includes at least one communication optical fiber 211 cable 21, and the specific number can be determined according to specific requirements.

[0035] It can be understood that the communication unit 20 of the embodiment uses optical fiber as the carrier, high-density polyethylene (HDPE) as the inner insulating layer 213, and polytetrafluoroethylene (F46) as the outer insulating layer 212. Then, the number of optical fiber cables 21 required according to the communication volume and other conditions of the tethered unmanned aerial vehicle is designed, and then bundled and twisted into a cable. The cable core gap is filled with high-strength aramid, and the polytetrafluoroethylene (F46) is extruded to form an inner sheath. This structure has the advantages of stability, high strength, anti-extrusion, anti-interference, etc.

[0036] In the embodiment, the filling layer 30 is filled in the gap between the electrical unit 10 and the communication unit 20, and the filling layer 30 is preferably filled with aramid.

[0037] In the embodiment, the outer peripheral sheath 40 covers and wraps the outer periphery of the electrical unit 10, the communication unit 20, and the filling layer 30. The outer peripheral sheath 40 and the filling layer 30 are wrapped with non-woven fabric 31. The cable core is wrapped with non-woven fabric 31 outside the filling layer 30, and then a flexible polyurethane (TPE) sheath layer is extruded as an outer peripheral protective sheath. This cable has the characteristics of high strength and light weight.

[0038] In summary, the technical scheme of the present application has the following beneficial effects:

[0039] 1. The cable conductor in the application adopts a plurality of metal materials to mix small pitch bundles, the conductor of the bundle is extruded and wrapped with a flexible polyurethane insulation layer to form a conductive core, and according to the needs, a plurality of cores are used to form a cable with a communication unit at a small pitch, the cable core gap is filled with high-strength aramid, and the cable core is wrapped with non-woven fabric to stabilize the cable core, and then a flexible polyurethane sheath layer is extruded and wrapped outside, thereby combining a high-strength light tethered photoelectric composite cable for unmanned aerial vehicles, which meets the use requirements of the tethered unmanned aerial vehicle, can transmit direct current and communication data information, has lighter unit length and better tensile strength, and has the characteristics of softness, torsion resistance, light weight, high conductivity, high strength, anti-interference, fatigue resistance and the like.

[0040] 2. The photoelectric composite cable provided by the application, the conductor of the power unit adopts three kinds of fine wire small pitch bundles of tin-plated copper clad steel, tin-plated copper clad aluminum and tin-plated copper, wherein the tin-plated copper clad steel layer is used as the center layer, accounts for 12% of the cross section of a single conductive core, the tin-plated copper clad aluminum layer is used as the secondary outer layer and is wrapped outside the tin-plated copper clad steel layer, accounts for 46% of the cross section of a single conductive core, and the tin-plated copper layer is used as the outermost layer and is wrapped outside the tin-plated copper clad steel layer, accounts for 42% of the cross section of a single conductive core, and a polyurethane insulation layer is extruded and wrapped around the conductor, which has the advantages of stable structure, light weight, high strength and excellent conductivity compared with pure copper core.

[0041] 3. The photoelectric composite cable provided by the application, the communication unit adopts optical fiber as the carrier, high-density polyethylene is used as the inner insulation outside the optical fiber, and perfluoroethylene propylene is used as the outer insulation, and then the cable is formed according to the required core number, the cable core gap is filled with high-strength aramid, and the inner sheath is extruded and wrapped with perfluoroethylene propylene, which has the advantages of stable structure, high strength, anti-extrusion and anti-interference.

[0042] The above is only the preferred embodiment of the application, and does not limit the implementation and protection scope of the application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the content of the specification and drawings should be included in the protection scope of the application.

Claims

1. An electro-optical composite cable for tethered unmanned aerial vehicles, characterized by, The utility model relates to a kind of communication and power supply cable, including: Electric unit, including several wire cores, the wire core includes from inside to outside tin-coated copper clad steel center layer, tin-coated copper clad aluminum secondary outer layer, tin-coated copper outermost layer and first insulating layer, the outer periphery of the tin-coated copper outermost layer is extruded and wrapped the first insulating layer; Communication unit, twisted with the wire core, the communication unit includes protective inner cover and several optical fiber cables twisted in the protective inner cover, the optical fiber cable includes built-in communication optical fiber and inner insulating layer, outer insulating layer wrapped in the outer periphery of communication optical fiber; Filler layer, filled in the gap between the electric unit and communication unit; And Outer periphery sheath, cover and wrap the outer periphery of the electric unit, communication unit and filler layer, and non-woven fabric is wound between the outer periphery sheath and filler layer; Wherein, the cross-sectional area of the tin-coated copper clad steel center layer accounts for 12% of the cross section of single wire core, the cross-sectional area of the tin-coated copper clad aluminum secondary outer layer accounts for 46% of the cross section of single wire core, and the cross-sectional area of the tin-coated copper outermost layer accounts for 42% of the cross section of single electric wire core;The tin-coated copper clad steel center layer is made of tin-coated copper clad steel fine filament small pitch bundle twist, the tin-coated copper clad aluminum secondary outer layer is made of tin-coated copper clad aluminum fine filament small pitch bundle twist, and the tin-coated copper outermost layer is made of tin-coated copper fine filament small pitch bundle twist.

2. The electro-optical composite cable for a tethered drone according to claim 1, wherein, The first insulating layer is a polyurethane insulating layer.

3. The electro-optical composite cable for a tethered drone of claim 1, wherein, The outer periphery sheath is a polyurethane outer sheath.

4. The electro-optical composite cable for a tethered drone of claim 1, wherein, The inner insulating layer is a high-density polyethylene inner insulating layer, and the outer insulating layer is a polytetrafluoroethylene outer insulating layer.

5. The electro-optical composite cable for a tethered drone of claim 1, wherein, The protective inner cover of the communication unit is a polytetrafluoroethylene inner cover.

6. The electro-optical composite cable for a tethered drone of claim 1, wherein, The gaps between the several optical fiber cables are filled with high-strength aramid.

7. The electro-optical composite cable for a tethered drone of claim 1, wherein, The filler layer is filled with aramid.

8. The electro-optical composite cable for a tethered drone of claim 1, wherein, The communication unit includes four optical fiber cables.

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