CN210271836U

CN210271836U - Coaxial data cable for intelligent vehicle driving system

Info

Publication number: CN210271836U
Application number: CN201921243905.6U
Authority: CN
Inventors: 楚立勇; 白丽英; 梅霞兵; 郭志良
Original assignee: Shanghai Fuerxin Cable Co ltd
Current assignee: Shanghai Fuerxin Cable Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-04-07
Anticipated expiration: 2029-08-02

Abstract

The utility model provides a coaxial data cable that vehicle intelligence driving system used, conductor sandwich layer, insulating layer, shielding layer and top layer sheath all adopt current common material to make up, and material cost compares in military coaxial cable's lower, combines the utility model discloses the structure shows through the result that performance test obtained, coaxial data cable's transmission's stop frequency higher, satisfy a larger amount of data transmission requirements.

Description

Coaxial data cable for intelligent vehicle driving system

Technical Field

The utility model relates to a coaxial data cable that automobile-used cable technical field, especially a vehicle intelligence driving system used.

Background

Coaxial data cables or coaxial data cables are used in a wide variety of applications, for example, in medical, telecommunications, automotive, and other fields. Because the application environment and the use requirement of the coaxial data cable in each field are different, the performance requirements of the coaxial data cable in different fields are different, the professionalism is strong, the coaxial data cable is difficult to be used in cross-fields, if the coaxial data cable is used in cross-fields, the coaxial data cable with excellent performance in other fields can be used, but the cost is high, and under the condition of high cost, the performance of the coaxial data cable in other fields cannot meet the use requirement, because the performance of the coaxial data cable in other fields is excellent or good, but the performance can be backward in the other fields due to various reasons. For example, application No.: 201410050359.X, publication No.: CN103985979A, published: 20140813, discloses a connection structure of coaxial cable bundle and its manufacturing method, which is mainly used in the wiring of medical equipment and various small information equipments. As another example, application No.: 200480014160.6, publication No.: CN1795517, published: 20060628, discloses a foamed coaxial cable and a method of manufacturing the same, applied to an information communication apparatus and an inspection/inspection apparatus of a semiconductor device applied to the apparatus, wherein the accuracy of a characteristic impedance value between an inner conductor and an outer conductor with an insulating member interposed therebetween is ± 1 Ω. The coaxial cables of the two patent technologies have different performance requirements due to different use environments and different automobile fields, so that the coaxial cables are difficult to be used in the automobile field.

With the advancement of modern network technology and the aggravation of competition in the automobile enterprise industry, consumers have higher and higher requirements on automobiles, and particularly the requirements on automobile networking, entertainment and intellectualization are increasingly strong. Modern automobiles and high-end business vehicles have put higher demands on vehicle-mounted audio and video systems, vehicle-mounted intelligent network systems and automatic driving systems in research and development. The vehicle data cable, as a medium for information transmission in and between the systems, naturally also puts higher demands on the vehicle data cable.

The early data cable for vehicles was mostly transferred from the coaxial cable developed and designed by the boeing company in the last century for military aircraft, because the insulating material used was fluoroplastic, the price was expensive, and the technology at that time could not meet the requirements of modern intelligent vehicles. For example, the termination frequency of the design of the early coaxial line is 50MHz, 100MHz, and 1G, while the requirement of modern cars is increased to 3G, and some require even 6G in order to ensure that larger amount of data, higher definition, and more fidelity video and audio information can be transmitted. Obviously, the conventional vehicle data cable cannot be satisfied, and most vehicles continue to use the conventional vehicle data cable.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a coaxial data cable that vehicle intelligence driving system used, its termination frequency is higher, satisfies a larger amount of data transmission requirements.

The utility model discloses a realize like this: a coaxial data cable for an intelligent vehicle driving system comprises a conductor core layer, and an insulating layer, a shielding layer and a surface layer sheath which are sequentially and coaxially coated outside the conductor core layer from inside to outside;

the conductor core layer comprises a plurality of conductors made of annealed soft copper or copper-clad steel, and the plurality of conductors are twisted together to form the conductor core layer;

the insulating layer comprises an inner skin layer, a foaming layer and an outer skin layer which are sequentially coated from inside to outside; the inner skin layer is of a solid structure, is made of PP or low-density PE and is coated on the surface of the conductor core layer; the foaming layer is made of PP or high-density PE; the outer skin layer is of a solid structure and is made of PP or low-density PE;

the shielding layer comprises a metal foil layer and a shielding metal mesh layer; the metal foil layer is coated on the surface of the outer skin layer; the shielding metal mesh layer is coated on the surface of the metal foil layer;

the surface layer sheath is of an annular solid structure and is made of flame-retardant PVC or TPU; the surface layer sheath is coated on the surface of the shielding metal mesh layer.

Furthermore, the number of the conductors is seven, wherein one conductor is positioned in the center, and the remaining six conductors are uniformly distributed outside the central conductor in a circumferential manner, so that the conductors are concentrically twisted into the conductor core layer.

Further, the pitch-diameter ratio of the conductor core layer is less than or equal to 24.

Further, the diameter precision of each conductor is +/-0.002 mm.

Further, the thickness of the inner skin layer is 0.05 mm.

Further, the foaming degree of the foaming layer is 45-50%.

Further, the thickness of the outer skin layer is 0.05 mm-0.1 mm.

Further, the metal foil layer is a single-sided aluminum-plastic composite belt or a double-sided aluminum-plastic composite belt.

Furthermore, the shielding metal net layer is formed by weaving tinned annealed soft copper wires.

Further, the temperature grade of the surface layer sheath is above 105 ℃.

The utility model has the advantages of as follows: the utility model provides a coaxial data cable that vehicle intelligence driving system used, conductor sandwich layer, insulating layer, shielding layer and top layer sheath all adopt current ordinary material to make up, and material cost compares in military coaxial cable's lower, combines the utility model discloses the structure shows through the result that performance test obtained, coaxial data cable's transmission stop frequency higher, satisfy a larger amount of data transmission requirements.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the coaxial data cable of the present invention.

Fig. 2 is a cross-sectional view of the coaxial data cable of the present invention.

Fig. 3 is a test frequency data table of return loss in the performance test of the second embodiment of the coaxial data cable of the present invention.

Fig. 4 is a test frequency data table of standing-wave ratio in the performance test of the second embodiment of the coaxial data cable according to the present invention.

Fig. 5 is a test frequency data table of attenuation in the performance test of the second embodiment of the coaxial data cable according to the present invention.

Fig. 6 is a waveform diagram of the return loss of fig. 3.

Fig. 7 is a waveform diagram of the standing wave ratio of fig. 4.

Fig. 8 is a waveform diagram of the attenuation of fig. 5.

In the figure: 100. coaxial data cable, 1, conductor core layer, 11, conductor, 2, insulating layer, 21, inner skin layer, 22, foaming layer, 23, outer skin layer, 3, shielding layer, 31, metal foil layer, 32, shielding metal mesh layer, 4 and surface sheath.

Detailed Description

Please refer to fig. 1 to 8;

the first embodiment is as follows:

the utility model provides a coaxial data cable 100 for a vehicle intelligent driving system, which comprises a conductor core layer 1, and an insulating layer 2, a shielding layer 3 and a surface layer sheath 4 which are coaxially coated outside the conductor core layer 1 from inside to outside in sequence;

the conductor core layer 1 comprises a plurality of conductors 11 made of annealed soft copper or copper-clad steel, and the plurality of conductors 11 are twisted together to form the conductor core layer 1; the conductor 11 made of annealed soft copper material enables the coaxial data cable 100 to have better flexibility and electrical performance, the conductor 11 made of copper-clad steel enables the coaxial data cable 100 to have more excellent tensile strength, and the appropriate conductor 11 is selected according to the specific application environment of the coaxial data cable 100 product; the conductor core layer 1 structure can adopt a 7-conductor 11 concentric twisting structure (namely 1+6), wherein a plurality of conductors 11 can be selected to enable the coaxial data cable 100 to obtain better bending characteristics, and the conductor core layer 1 structure can be stable by adopting 7-conductor 11 concentric twisting, so that the high-frequency performance of the coaxial data cable 100 is improved.

The insulating layer 2 comprises an inner skin layer 21, a foaming layer 22 and an outer skin layer 23 which are sequentially coated from inside to outside; the inner skin layer 21 is of a solid structure, is made of PP or low-density PE, and is coated on the surface of the conductor core layer 1; the foaming layer 22 is made of PP or high density PE; the outer skin layer 23 is a solid structure and is made of PP or low density PE. In specific implementation, the insulating layer 2 may be made of a high-purity low-dielectric constant PP material or a 105 ℃ PE material, wherein the PP material or the 105 ℃ PE material can enable the coaxial data cable 100 to have a wider application temperature and a lower dielectric constant, and improve the application range and the attenuation performance of the coaxial data cable 100; the foaming layer 22 can be made of relatively soft PE or PP (namely, high-density PE or PP), so that the foaming layer 22 of the coaxial data cable 100 can be processed more easily to obtain a fine, soft and uniform foaming layer 22, and the inner skin layer 21 and the outer skin layer 23 of the insulating layer can be made of PE or PP (namely, low-density PE or PP) with higher strength to protect the foaming layer 22 better; the structure of the insulating layer 2 is a skin-foam-skin structure, namely an inner skin layer 21, a foaming layer 22 and an outer skin layer 23 from inside to outside, wherein the inner skin layer 21 and the outer skin layer 23 are solid structures, the foaming layer 22 is an air and medium combined structure, the inner skin layer 21 can homogenize an electric field of distortion generated by irregularity of the stranded conductor 11, the foaming layer 22 can reduce the relative dielectric constant of the insulating layer 2 (the dielectric constant of air is 1, and the relative dielectric constant of PP or PE materials is 2.2-2.4), and the outer skin layer 23 can provide a protective effect for the foaming layer 22.

The shielding layer 3 comprises a metal foil layer 31 and a shielding metal mesh layer 32; the metal foil layer 31 is coated on the surface of the outer skin layer 23; the shielding metal mesh layer 32 is coated on the surface of the metal foil layer 31; in specific implementation, the metal foil layer 31 used in the shielding layer 3 can be made of a single-sided aluminum-plastic composite tape or a double-sided aluminum-plastic composite tape, and the metal braided wires of the shielding metal mesh layer 32 can be made of annealed tin-plated soft copper wires, wherein aluminum has good ductility and economic applicability, and the tin-plated annealed soft copper wires have better conductivity and oxidation resistance; the structure of the shielding layer 3 can be selected from a longitudinal-wrapped aluminum-plastic composite belt and a tinned copper wire weaving structure. The aluminum-plastic composite tape can protect the insulating layer 2, prevent burrs of the braided wires from damaging the insulating layer 2 and prevent the insulating layer 2 from being scalded in the subsequent high-temperature extrusion process of the sheath process; the aluminum foil shielding has a good shielding effect on electromagnetic waves with short wavelengths, and the tinned wire braided shielding has a good intercepting effect on electromagnetic waves with long wavelengths, so that the coaxial data cable 100 has a good anti-interference capability and can also effectively prevent the coaxial data cable from generating an interference source by adopting the longitudinal-wrapped aluminum-plastic composite tape and tinned copper wire braided combined shielding.

The surface layer sheath 4 is of an annular solid structure and is made of flame-retardant PVC or TPU; the surface layer sheath 4 is coated on the surface of the shielding metal mesh layer 32. The material used for the surface layer sheath 4 can be a flame-retardant PVC or TPU material with the temperature grade of 105 ℃ and above, wherein the temperature grade of 105 ℃ is the temperature grade T2 in the automobile industry, the coaxial data cable 100 has a wide application range due to the high temperature grade, the PVC material has good processing characteristics and economic applicability, the TPU material has good flexibility and oxidation resistance, and the material of the surface layer sheath 4 of the coaxial data cable 100 can be selected according to the specific application environment; the structure of the surface layer sheath 4 is an annular solid structure, and the annular solid structure is extruded on the surface of the shielding layer 3 to protect the internal structure of the shielding layer.

Conductor sandwich layer 1, insulating layer 2, shielding layer 3 and top layer sheath 4 all adopt current material to make, and material cost compares in the lower of for military use coaxial cable, and the structure through each layer and the material combination that corresponds become coaxial data cable 100 during, through right coaxial data cable 100 capability test obtain the result show, coaxial data cable 100's transmission stop frequency higher, satisfy a larger amount of data transmission requirements, low in manufacturing cost simultaneously for whole price/performance ratio compares in the higher of current for military use coaxial data cable.

The number of the conductors 11 is seven, wherein one conductor 11 is located at the center, and the remaining six conductors 11 are uniformly distributed outside the central conductor 11 in a circumferential manner, so as to be concentrically twisted into the conductor core layer 1.

The pitch-diameter ratio of the conductor core layer 1 is less than or equal to 24. The diameter precision of each conductor 11 is +/-0.002 mm. The monofilament diameter precision of the conductor 11 used in the conductor core layer 1 is controlled within +/-0.002 mm, the actual twisting pitch-diameter ratio of the conductor 11 is controlled within 24 times, and the single precision and the twisting pitch-diameter ratio of the conductor 11 are controlled to ensure that the coaxial data cable 100 of the utility model obtains more stable characteristic impedance;

the thickness of the inner skin layer 21 was 0.05 mm. The foaming degree of the foaming layer 22 is 45-50%; the thickness of the outer skin layer 23 is 0.05 mm-0.1 mm. Wherein, the thickness of the inner skin layer 21 of the insulating layer 2 is recommended to be about 0.05mm, the outer diameter of the product is increased when the thickness is too thick, and the effect of homogenizing the electric field of the conductor is reduced when the thickness is too thin; the foaming degree of the foaming layer 22 is recommended to be controlled between 45% and 50%, if the foaming degree is too low, the effect of reducing the dielectric constant of the insulating layer 2 is not obvious, the high-frequency performance is affected, and if the foaming degree is too high, the insulating layer 2 is too fragile, so that the product is easily damaged in the subsequent processing and using processes, and the service life is shortened; the thickness of the outer skin layer 23 is recommended to be 0.05-0.1 mm, and the outer skin layer is too thick, so that the outer diameter of the product is increased; too thin, it reduces its protective effect on the foam layer 22; the important parameter for determining the insulation outer diameter of the product is the characteristic impedance of the product, and the size of the characteristic impedance depends on the proportion of the conductor outer diameter to the insulation outer diameter, so that each parameter of each conductor and insulation of the product needs to be precisely calculated at the beginning of designing the product, and the empirical calculation formula of the characteristic impedance is as follows:

wherein Zc is the characteristic impedance of the product; epsilon D is the equivalent dielectric constant of the product insulating layer; d is the outer diameter of the insulating layer, and the unit is mm; d is the diameter of the conductor monofilament and the unit is mm; d_WThe monofilament diameter of the woven filament of the product is mm; k1 is the effective diameter coefficient of the conductor, and k1 is 0.939 for 7 conductors in concentric twisting.

The metal foil layer 31 is a single-sided aluminum-plastic composite tape or a double-sided aluminum-plastic composite tape, if the single-sided aluminum-plastic composite tape is adopted, the aluminum foil faces outwards, is in contact with the shielding metal mesh layer 32 and is conducted, and the plastic faces inwards wrap the outer skin layer 23; the double-sided aluminum-plastic composite belt is adopted, so that the distinction is not needed; the shielding metal mesh layer 32 is woven by tinned annealed soft copper wires.

The temperature grade of surface layer sheath 4 is more than 105 ℃ temperature grade, satisfies the high temperature environment user demand in the narrow and small space of car, prevents to take place to melt, bad phenomenon such as spontaneous combustion produces, leads to coaxial data cable 100 damage, and influence its performance.

Example two: on the basis of the first embodiment, a group of data is selected for manufacturing, and then the performance of the data is tested;

the utility model relates to a manufacturing method of coaxial data cable that vehicle intelligence driving system used, including following step:

step 1, stranding a plurality of annealed soft copper or copper-clad steel conductors 11 to form a conductor core layer 1;

2, extruding an insulating layer 2 outside the conductor core layer 1 by using an insulating extruder, wherein the insulating layer 2 comprises an inner skin layer 21, a foaming layer 22 and an outer skin layer 23 which are sequentially coated from inside to outside; the inner skin layer 21 is of a solid structure, is made of PP or low-density PE, and is coated on the surface of the conductor core layer 1; the foaming layer 22 is made of PP or high density PE; the outer skin layer 23 is of a solid structure and is made of PP or low-density PE; the insulation extruder is a three-layer co-extrusion foaming extruder, and the foaming mechanism is a nitrogen injection physical foaming principle;

step 3, manufacturing a shielding layer 3 outside the insulating layer 2 by using a knitting machine, wherein the shielding layer 3 comprises a metal foil layer 31 and a shielding metal mesh layer 32; the metal foil layer 31 is coated on the surface of the outer skin layer 23; the shielding metal mesh 32 layer is coated on the surface 31 of the metal foil layer;

and 4, extruding a surface layer sheath 4 outside the shielding layer 3, wherein the surface layer sheath 4 is of an annular solid structure and is made of flame-retardant PVC or TPU.

Taking 0.4mm2 as an example, the coaxial data cable 100 has a conductor core layer 1 structure in which 7 conductors 11 with the monofilament diameter of 0.26 are concentrically twisted, the twisting pitch is 16mm, the thickness of the inner skin layer 21 is 0.05mm, the thickness of the outer skin layer 23 is 0.09mm, the thickness of the foam layer 22 is 0.5mm, the dielectric constants of the materials of the inner skin layer 21 and the outer skin layer 23 are 2.2, the dielectric constant of the material of the foam layer 22 is 2.4, the foaming degree of the foam layer 22 is 46%, the outer diameter of the insulating layer 2 is 2.08mm, and the relative equivalent dielectric constant of the insulating layer 2 is 1.8.

The insulation extruder is a three-layer co-extrusion foaming extruder, and the foaming mechanism is a nitrogen injection physical foaming principle; the screw used is a mutant screw, and the compression ratio is 2-4; the extrusion die is an extrusion die, if the insulation stripping force of a product needs to be increased, the length of a sizing area of the die can be properly increased by 1-2 mm, and the diameter of an outlet of the die is the same as the outer diameter of the insulation layer 2; the plasticizing temperature of the insulating material is not easy to be too high, and is preferably 210 ℃; 1-2 mass percent of nucleating agent (azodicarbonamide) is added into the insulating material of the foaming layer 22, wherein the foaming material has stronger temperature sensitivity due to the addition of the nucleating agent, such as a long screw or a slow extrusion speed, when the temperature is set, the temperature is gradually reduced in a subsequent temperature region after the temperature of a plasticizing section reaches the plasticizing temperature, otherwise, the foaming layer 22 is easy to break, the high-frequency performance of the product is influenced, and the specific expression is that the outer diameter of a cold end is larger than that of a hot end during the insulating extrusion; the nitrogen injection pressure and flow rate of the foaming layer 22 are stable, and the foaming degree is changed by changing the flow rate of nitrogen injection; if the stripping force of the insulating layer needs to be adjusted, ethylene acrylic acid copolymer (EAA) with the mass ratio of 0.5-2% can be mixed into the insulating material of the inner skin layer 21 to adjust the magnitude of the insulating stripping force and the thermal retraction; the concentricity of the insulating layer 2 is adjusted by adjusting an offset nut of the cross machine head, and for the series of products, the concentricity of the insulating layer 2 is not less than 95%; observing parameters such as the cold end outer diameter, the cold end water capacitance, the foaming degree, the concentricity and the like of the extruded insulating layer 2 during extrusion, and if the numerical value is stable and the variation amplitude is small, the insulating structure of the product is stable; the outer diameter of each layer of the insulating layer 2 can be adjusted through the proportion of the three layers of screws with different rotating speeds; immersing the extruded insulation material into a cooling water tank for cooling immediately, wherein a step cooling mode is adopted, the temperature of the water tank at the first section can be set to be 60-70 ℃, the temperature at the rear section is gradually reduced, and the low-temperature water tank section can also be cooled in a spraying mode; preheating the conductor core layer 1 before extruding the insulating layer 2, wherein the preheating temperature can be set to be 100-150 ℃; in the production process, the tension in the wire advancing process is stable and controllable, the advancing tensions of the conductor core layers 1 made of different materials and specifications are different, but the tension borne by the conductor core layer 1 is usually not more than 50Mpa/mm 2; examples are: when the insulating layer 2 of the data line with the thickness of 0.35mm2 and the thickness of 50 omega is extruded, the plasticizing temperature of the insulating inner skin layer 21 and the insulating outer skin layer 23 is 210 ℃, the plasticizing temperature of the foaming layer 22 is 200 ℃, the nucleating agent proportion of the foaming layer 22 is 2 percent by mass, the absolute pressure of nitrogen injection is 100bar, the relative pressure is 44bar, the average gas melting pressure is 172bar, and the nitrogen flow is 0.093 In/min; the rotating speeds of the screws corresponding to the inner skin layer 21, the foaming layer 22 and the outer skin layer 23 are respectively 17rpm, 52rpm and 35rpm, and the corresponding production line speed is 370 m/min; the control range of the outer diameter of the cold end is 2.08 +/-0.01 mm, the control range of the water capacitance of the cold end is 89-90 pF/m, and the foaming degree is 46%; the preheating temperature of a conductor core layer 1 is set to be 100 ℃, the linear stroke tension is 15N, the temperature of a first-order cooling water tank is set to be 60 ℃, and the temperature of a second-order cooling water tank is set to be 40 ℃;

the 16-spindle braiding machine can be selected as equipment for producing the shielding layer 3, and the monofilament diameter, strand number and braiding pitch of the braided wire are selected according to the required braiding density of the product; for the series products, the section is smaller, and the braided wire with the monofilament diameter of 0.10mm or 0.12mm is preferably selected; for this series of products, the weaving density should be greater than 90%; the knitting angle is the included angle formed by the knitting silk and the knitting line, and is preferably close to 45 degrees; the covering rate of the longitudinally wrapped aluminum-plastic composite belt used by the product is not less than 25 percent, but not more than 50 percent;

the equipment used for producing the surface layer sheath 4 needs stable tension, the number of the wire guide wheels is preferably small, and the wire does not need to bear excessive external pressure in the process of advancing; the sheath extrusion mode can be a semi-extrusion type or a vacuum-pumping extrusion type; the plasticizing temperature of the material of the surface layer sheath 4 used by the product is preferably 170-180 ℃, and the concentricity of the surface layer sheath 4 is more than 85%.

As shown in fig. 3 to 8, are experimental data of high frequency performance tests of the coaxial data cable 100. Through practical tests, the performance of the transmission line meets the transmission requirement of 6G of the termination frequency.

When testing the high-frequency performance, a network analyzer is used for testing. The test method is to connect the coaxial data cable 100 to two ports of a network analyzer and then test the performance of the cable. The test items mainly comprise the performances of attenuation, return loss, standing-wave ratio and the like.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a coaxial data cable that vehicle intelligence driving system used which characterized in that: the shielding layer is arranged on the surface of the conductor core layer, and the insulating layer, the shielding layer and the surface layer sheath are sequentially and coaxially coated outside the conductor core layer from inside to outside;

2. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the number of the conductors is seven, one of the conductors is located in the center, and the remaining six conductors are uniformly distributed outside the central conductor in a circumferential mode, so that the conductors are concentrically twisted into the conductor core layer.

3. The coaxial data cable for the intelligent driving system of the vehicle according to claim 2, wherein: the pitch-diameter ratio of the conductor core layer is less than or equal to 24.

4. The coaxial data cable for the intelligent driving system of the vehicle according to any one of claims 1 to 3, wherein: the diameter precision of each conductor is +/-0.002 mm.

5. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the thickness of the inner skin layer is 0.05 mm.

6. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the foaming degree of the foaming layer is 45-50%.

7. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the thickness of the outer skin layer is 0.05 mm-0.1 mm.

8. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the metal foil layer is a single-sided aluminum-plastic composite belt or a double-sided aluminum-plastic composite belt.

9. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the shielding metal net layer is formed by weaving tinned annealed soft copper wires.

10. The coaxial data cable for the intelligent driving system of the vehicle according to claim 1, wherein: the temperature grade of the surface layer sheath is above 105 ℃.