Automobile coaxial cable

Abstract

The utility model relates to cable technical field, concretely relates to a car coaxial cable, including conductor, insulating layer, buffer layer, first shielding layer, second shielding layer and protective sheath, and the conductor is filamentous, insulating layer adopts insulating material, and the outer surface of conductor is covered, buffer layer adopts insulating material, and the outer surface of insulating layer is covered, first shielding layer adopts metal material, and the outer surface of buffer layer is covered, second shielding layer adopts metal material, and the outer surface of first shielding layer is covered, and the ground lead wire between first shielding layer and second shielding layer is equipped, protective sheath adopts insulating material, and the outer surface of second shielding layer is covered, and the optical fiber sensor for state monitoring is embedded in the protective sheath. The optical fiber sensor can be connected to the external optical time domain reflectometer, and the reflected light signal is collected and analyzed, and the cable is monitored in real time, the risk of cable is known in advance, the predictive maintenance is realized, and the whole vehicle safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to an automotive coaxial cable. Background Technology

[0002] With the development of intelligent and electric vehicles, new energy vehicles are becoming increasingly common, and vehicle control is becoming more and more complex. Cables are an essential component in this process. Vehicle cables not only need to transmit high-speed data signals, but also need to operate stably in harsh mechanical and thermal environments.

[0003] For example, existing technologies provide coaxial cables with spring protection and air cushioning, improving their resistance to bending and impact. However, current cables lack real-time monitoring of their own health status and cannot predict potential failures caused by fatigue or overheating. Therefore, there is an urgent need for a new cable structure that maintains excellent mechanical and shielding performance while also possessing intelligent monitoring capabilities. Utility Model Content

[0004] The purpose of this invention is to provide an automotive coaxial cable that can monitor the cable status in real time, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides an automotive coaxial cable, comprising a conductor, an insulation layer, a buffer layer, a first shielding layer, a second shielding layer, and a protective sleeve. The conductor is filamentous; the insulation layer is made of an insulating material and covers the outer surface of the conductor; the buffer layer is made of an insulating material and covers the outer surface of the insulation layer; the first shielding layer is made of a metal material and covers the outer surface of the buffer layer; the second shielding layer is made of a metal material and covers the outer surface of the first shielding layer; a grounding lead is provided between the first shielding layer and the second shielding layer; the protective sleeve is made of an insulating material and covers the outer surface of the second shielding layer, and an embedded fiber optic sensor for status monitoring is embedded within the protective sleeve. Furthermore, the conductor is an oxygen-free copper wire, and the conductor diameter is between 0.1 and 3 mm. Furthermore, the insulation layer is a one-piece foamed polyethylene structure. Furthermore, the buffer layer is made of silicone foam or thermoplastic polyurethane foam. Furthermore, the first shielding layer is a copper composite film. Furthermore, the second shielding layer is an oxygen-free copper braided mesh. Furthermore, the grounding lead wire is a tinned copper wire that is tightly attached to the first shielding layer and the second shielding layer, and the grounding lead wire extends along the cable axis.

[0006] Furthermore, the protective sleeve is made of thermoplastic polyurethane material, and the fiber optic sensor is co-extruded with the protective sleeve. The fiber optic sensor is used to monitor the strain and temperature of the cable in real time. Furthermore, the outer surface of the protective sleeve is provided with an anti-UV and oil-resistant coating. Furthermore, this application also provides an automotive coaxial cable, comprising a conductor, an insulation layer, a buffer layer, a first shielding layer, a second shielding layer, and a protective sleeve. The conductor is filamentous; the insulation layer is made of an insulating material and covers the outer surface of the conductor; the buffer layer is made of an insulating material and covers the outer surface of the insulation layer, and the outer surface of the buffer layer is provided with a conductive ink sensing circuit; the first shielding layer is made of a metal material and covers the outer surface of the buffer layer; the second shielding layer is made of a metal material and covers the outer surface of the first shielding layer, and a grounding lead is provided between the first shielding layer and the second shielding layer; the protective sleeve is made of an insulating material and covers the outer surface of the second shielding layer.

[0007] The beneficial effects of this utility model are as follows: 1. The protective sleeve is made of insulating material and has an embedded fiber optic sensor. The fiber optic sensor can be connected to an external optical time domain reflectometer. By collecting and analyzing the reflected light signal, it can monitor the strain and temperature of the cable in real time along its entire length, including judging bending fatigue, stress overload, and overheating risk. This allows for early detection of cable risks, enabling predictive maintenance and improving overall vehicle safety.

[0008] 2. The conductor uses oxygen-free copper wire, which is formed by drawing an 8.0mm oxygen-free copper rod into shape in one go. During the operation, it is directly drawn through large, medium and fine pulls until it is drawn to the specifications required for use, and the process is completed in one go.

[0009] 3. The first shielding layer is a copper composite film, and the second shielding layer is an oxygen-free copper braided mesh. The two together form an optimal shielding effect similar to a metal pipe, which greatly improves the cable's anti-interference and self-interference capabilities (EMI and EMC), and also adapts to different complex signal interference environments.

[0010] 4. The protective sleeve is made of thermoplastic polyurethane. During the extrusion molding process of the protective sleeve, an optical fiber is simultaneously embedded inside as a condition monitoring module. The protective sleeve layer has the characteristics of wear resistance, corrosion resistance, bending resistance, and UV resistance, making the cable in this application more weather-resistant and able to adapt to different ambient temperatures. In addition, it has good flame retardant effect, low smoke, and halogen-free environmental protection, ensuring that no harmful substances are generated under ultra-high temperature conditions, effectively meeting the complex and high-temperature automotive engine environment. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 A schematic diagram of the internal structure of an automotive coaxial cable provided in an embodiment of this utility model; Figure 2 A schematic diagram showing the location of the grounding lead wire used in an automotive coaxial cable according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the internal structure of a protective sleeve used in an automotive coaxial cable, provided as an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached figures: 10. Conductor; 20. Insulation layer; 30. Buffer layer; 40. First shielding layer; 50. Second shielding layer; 51. Grounding lead wire; 60. Protective sleeve; 61. Fiber optic sensor. Detailed Implementation

[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Example 1 Reference Figures 1 to 3 As an embodiment of this utility model, an automotive coaxial cable includes a conductor 10, an insulation layer 20, a buffer layer 30, a first shielding layer 40, a second shielding layer 50, and a protective sleeve 60. The conductor 10 is filamentous. The insulation layer 20 is made of insulating material and covers the outer surface of the conductor 10. The buffer layer 30 is made of insulating material and covers the outer surface of the insulation layer 20. The first shielding layer 40 is made of metal and covers the outer surface of the buffer layer 30. The second shielding layer 50 is made of metal and covers the outer surface of the first shielding layer 40. A grounding lead 51 is provided between the first shielding layer 40 and the second shielding layer 50. The protective sleeve 60 is made of insulating material and covers the outer surface of the second shielding layer 50. An optical fiber sensor 61 for status monitoring is embedded in the protective sleeve 60.

[0019] The protective sleeve 60 is made of insulating material and has an embedded fiber optic sensor 61. The fiber optic sensor 61 can be connected to an external optical time domain reflectometer. By collecting and analyzing the reflected light signal, it can monitor the strain and temperature of the cable in real time along its entire length, including judging bending fatigue, stress overload, and overheating risks. This allows for early detection of cable risks, enabling predictive maintenance and improving overall vehicle safety.

[0020] Furthermore, conductor 10 is made of oxygen-free copper wire, with a diameter between 0.1 and 3 mm. The oxygen-free copper wire is formed by drawing an 8.0 mm oxygen-free copper rod into wire in one operation. During the process, it undergoes large, medium, and fine drawing steps until it reaches the required specifications, all in one continuous operation. Oxygen-free copper wire has strong oxidation resistance, high flexibility, and is less prone to core breakage.

[0021] Furthermore, the insulation layer 20 is a one-piece foamed polyethylene structure. It is formed in one piece by over-extrusion and wrapped around the conductor 10, resulting in a stable dielectric constant and light weight.

[0022] Furthermore, the buffer layer 30 is made of silicone foam or thermoplastic polyurethane foam. The buffer layer 30 is extruded and molded onto the outer surface of the insulation layer 20 in one step. The buffer layer 30 has a solid, porous, elastic structure, providing durable and stable cushioning protection.

[0023] Furthermore, the first shielding layer 40 is a copper composite film, and the second shielding layer 50 is an oxygen-free copper braided mesh. Together, they form an optimal shielding effect similar to a metal conduit, greatly improving the cable's anti-interference and self-interference capabilities (EMI and EMC), and also adapting to various complex signal interference environments. The grounding lead-in wire 51 is a tinned copper wire, tightly bonded to the first shielding layer 40 and the second shielding layer 50. The grounding lead-in wire 51 extends along the cable axis to ensure that the shielding layers can be effectively grounded.

[0024] Furthermore, the protective sleeve 60 is made of thermoplastic polyurethane material, and the fiber optic sensor 61 is co-extruded with the protective sleeve 60. The fiber optic sensor 61 is used to monitor the strain and temperature of the cable in real time.

[0025] Specifically, the protective sleeve 60 is made of thermoplastic polyurethane. During the extrusion molding process of the protective sleeve 60, an optical fiber is simultaneously embedded within the protective sleeve 60 as a condition monitoring module. The protective sleeve 60 layer has characteristics such as wear resistance, corrosion resistance, bending resistance, and UV resistance, making the cable in this application more weather-resistant and able to adapt to different ambient temperatures. Furthermore, it has good flame retardant properties, low smoke, and halogen-free environmental friendliness, ensuring that no harmful substances are generated under ultra-high temperature conditions, effectively meeting the requirements of the complex and high-temperature automotive engine environment. The outer surface of the protective sleeve 60 is coated with an anti-UV and oil-resistant coating, giving the cable resistance to ultraviolet rays and oil stains.

[0026] In this embodiment, the protective sleeve 60 is embedded with an optical fiber sensor 61, which can be connected to an external optical time domain reflectometer. By collecting and analyzing the reflected light signal, the strain and temperature of the cable along its entire length can be monitored in real time, including the determination of bending fatigue, stress overload, and overheating risk. This allows for early detection of cable risks, enabling predictive maintenance and improving overall vehicle safety.

[0027] Example 2 An automotive coaxial cable provided as an embodiment of this utility model includes a conductor, an insulation layer, a buffer layer, a first shielding layer, a second shielding layer, and a protective sleeve. The conductor is filamentous. The insulation layer is made of insulating material and covers the outer surface of the conductor. The buffer layer is made of insulating material and covers the outer surface of the insulation layer, with a conductive ink sensing circuit provided on the outer surface of the buffer layer. The first shielding layer is made of metal and covers the outer surface of the buffer layer. The second shielding layer is made of metal and covers the outer surface of the first shielding layer, with a grounding lead wire provided between the first and second shielding layers. The protective sleeve is made of insulating material and covers the outer surface of the second shielding layer.

[0028] Conductive ink sensing circuitry is printed onto the outer surface of a buffer layer, then covered with a shielding layer and a sheath. This circuit can be designed as a resistive strain gauge or temperature sensor, and connected to an onboard monitoring system via lead wires, enabling more cost-effective local condition monitoring. Real-time monitoring of cable strain and temperature along its entire length allows for assessment of bending fatigue, stress overload, and overheating risks, providing early detection of cable hazards, enabling predictive maintenance, and improving overall vehicle safety.

[0029] Furthermore, the conductor uses oxygen-free copper wire with a diameter between 0.1 and 3 mm. The oxygen-free copper wire is formed by drawing an 8.0 mm oxygen-free copper rod into shape in one operation. During the process, it undergoes large, medium, and fine drawing steps until it reaches the required specifications, all in one continuous process. Oxygen-free copper wire has strong oxidation resistance, high flexibility, and is less prone to core breakage.

[0030] Furthermore, the insulation layer is a one-piece foamed polyethylene structure. It is formed in one piece by over-extrusion and wrapped around the conductor, resulting in a stable dielectric constant and light weight.

[0031] Furthermore, the buffer layer is made of silicone foam or thermoplastic polyurethane foam. The buffer layer is extruded and molded onto the outer surface of the insulation layer in a single process. The buffer layer has a solid, porous, elastic structure, providing durable and stable cushioning protection.

[0032] Furthermore, the first shielding layer is a copper composite film, and the second shielding layer is an oxygen-free copper braided mesh. Together, they form an optimal shielding effect similar to a metal conduit, greatly improving the cable's anti-interference and self-interference capabilities (EMI and EMC), and adapting to various complex signal interference environments. The grounding lead is a tinned copper wire, tightly bonded to the first and second shielding layers, and extends along the cable axis to ensure effective grounding of the shielding layers.

[0033] Furthermore, the protective sleeve is made of thermoplastic polyurethane material, and the fiber optic sensor is co-extruded with the protective sleeve. The fiber optic sensor is used to monitor the strain and temperature of the cable in real time.

[0034] Specifically, the protective sleeve is made of thermoplastic polyurethane material. The sleeve layer is wear-resistant, corrosion-resistant, bend-resistant, and UV-resistant, making the cable in this application more weather-resistant and able to adapt to different ambient temperatures. Furthermore, it has good flame-retardant properties, low smoke, and is halogen-free and environmentally friendly, ensuring that no harmful substances are generated under ultra-high temperature conditions, effectively meeting the requirements of the complex and high-temperature automotive engine environment. The outer surface of the protective sleeve has an anti-UV and oil-resistant coating, giving the cable resistance to ultraviolet rays and oil stains.

[0035] In this embodiment, the conductive ink sensing circuit is printed on the outer surface of the buffer layer, and then covered with a shielding layer and a sheath. This circuit can be designed as a resistive strain gauge or a temperature sensor, and connected to the vehicle monitoring system via lead wires, enabling more cost-effective local condition monitoring. Real-time monitoring of the cable's strain and temperature along its entire length allows for assessment of bending fatigue, stress overload, and overheating risks, enabling early detection of cable risks, predictive maintenance, and improved vehicle safety.

[0036] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coaxial cable for automobiles, characterized in that, include, Conductor (10), in the form of filaments; An insulating layer (20) is made of insulating material and covers the outer surface of the conductor (10); The buffer layer (30) is made of insulating material and covers the outer surface of the insulating layer (20); The first shielding layer (40) is made of metal and covers the outer surface of the buffer layer (30); The second shielding layer (50) is made of metal and covers the outer surface of the first shielding layer (40). A grounding lead wire is provided between the first shielding layer (40) and the second shielding layer (50). The protective sleeve (60) is made of insulating material and covers the outer surface of the second shielding layer (50). The protective sleeve (60) contains an embedded fiber optic sensor (61) for status monitoring.

2. The automotive coaxial cable as described in claim 1, characterized in that, The conductor (10) is an oxygen-free copper wire, and the diameter of the conductor (10) is between 0.1 and 3 mm.

3. The automotive coaxial cable as described in claim 1, characterized in that, The insulation layer (20) is an integral foamed polyethylene structure.

4. The automotive coaxial cable as described in claim 1, characterized in that, The buffer layer (30) is made of silicone foam or thermoplastic polyurethane foam.

5. The automotive coaxial cable as described in claim 1, characterized in that, The first shielding layer (40) is a copper composite film.

6. The automotive coaxial cable as described in claim 1, characterized in that, The second shielding layer (50) is an oxygen-free copper braided mesh.

7. The automotive coaxial cable as described in claim 1, characterized in that, The grounding lead wire is a tinned copper wire that is tightly attached to the first shielding layer (40) and the second shielding layer (50), and the grounding lead wire extends along the cable axis.

8. The automotive coaxial cable as described in claim 7, characterized in that, The protective sleeve (60) is made of thermoplastic polyurethane material. The fiber optic sensor (61) is co-extruded with the protective sleeve (60). The fiber optic sensor (61) is used to monitor the strain and temperature of the cable in real time.

9. The automotive coaxial cable as described in claim 1, characterized in that, The outer surface of the protective sleeve (60) is provided with an anti-UV and oil-resistant coating.

10. A coaxial cable for automobiles, characterized in that, include, Conductor (10), in the form of filaments; An insulating layer (20) is made of insulating material and covers the outer surface of the conductor (10); The buffer layer (30) is made of insulating material and covers the outer surface of the insulating layer (20). The outer surface of the buffer layer (30) is provided with a conductive ink sensing circuit. The first shielding layer (40) is made of metal and covers the outer surface of the buffer layer (30); The second shielding layer (50) is made of metal and covers the outer surface of the first shielding layer (40). A grounding lead wire (51) is provided between the first shielding layer (40) and the second shielding layer (50). The protective cover (60) is made of insulating material and covers the outer surface of the second shielding layer (50).

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