Novel composite cable for laser radar wind measurement module

Abstract

The utility model discloses a novel composite cable for a laser radar wind measurement module, which relates to the technical field of cables and comprises a cable, the cable is composed of a high-frequency high-speed signal line group, an XLPE signal line group and a power line group, and a total shielding layer is arranged outside the high-frequency high-speed signal line group, the XLPE signal line group and the power line group. According to the high-frequency high-speed signal line group, the silver-plated copper pair-twisted insulating wire cores are adopted, electromagnetic interference among the wire cores is reduced in a pair-twisting mode, the first sub-shielding layer adopts an aluminum foil and copper net double-layer shielding structure, and the first inner layer sheath made of foamed polytetrafluoroethylene is combined, so that signal transmission loss is greatly reduced, external electromagnetic interference resistance is enhanced, and the service life of the cable is prolonged. Stable and accurate transmission of high-frequency signals is ensured, the silver-plated copper insulation wire core of the XLPE signal wire set is matched with the second inner layer sheath and the third inner layer sheath which are made of double-layer shielding and foaming polytetrafluoroethylene, reliable transmission of common signals is ensured, and diversified signal transmission requirements of the laser radar are met.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a novel composite cable for a lidar wind measurement module. Background Technology

[0002] The new generation of wind measuring radar is based on the coherent Doppler wind measurement principle and integrates pulse-continuous wave hybrid modulation technology with adaptive aerosol scattering signal processing algorithm, which significantly improves the accuracy of wind field inversion in low signal-to-noise ratio environments. At the same time, the introduction of dynamic wavefront correction technology solves the problem of poor adaptability of traditional radar motion platforms. Combined with a deep learning-based wind field inversion model, it realizes real-time reconstruction of three-dimensional wind fields and reduces data processing time to the millisecond level. These technological advancements have placed higher demands on the performance of cables for wind measuring radar.

[0003] Wind measuring radars are typically installed outdoors or on high towers, operating in harsh environments such as extreme temperatures, wind and rain, strong winds at high altitudes, and frequent movement and vibrations in confined spaces. In addition, wind measuring radars require a stable power supply and must transmit high-frequency signals, such as radar echoes or other data. However, conventional cables cannot meet the requirements of simultaneous power supply and high-frequency signal transmission, and their stability in harsh environments is also poor, failing to meet the working requirements of next-generation wind measuring radars. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a new type of integrated cable for lidar wind measurement modules to solve the technical problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel integrated cable for a lidar wind measurement module, comprising a cable, wherein the cable is composed of a high-frequency high-speed signal line group, an XLPE signal line group, and a power line group;

[0006] The high-frequency high-speed signal line group, XLPE signal line group and power line group are provided with a total shielding layer on the outside, and an outer sheath is provided on the outside of the total shielding layer. The total shielding layer is a shielding structure made of tin-plated copper braid, the coverage of the total shielding layer is ≥85%, and the outer sheath is made of weather-resistant polyurethane material.

[0007] The high-frequency high-speed signal line group consists of multiple sets of twisted insulated wire cores and a first sub-shielding layer, with the multiple sets of twisted insulated wire cores located inside the first sub-shielding layer. The high-frequency high-speed signal line group also includes a first inner sheath and a grounding wire. The grounding wire is located inside the first sub-shielding layer, and the first inner sheath is made of foamed polytetrafluoroethylene material.

[0008] The XLPE signal line assembly consists of multiple sets of insulated wire cores and a second sub-shielding layer, with the multiple sets of insulated wire cores located inside the second sub-shielding layer. The XLPE signal line assembly also includes a second inner sheath and a third inner sheath. The second inner sheath is sleeved on the outside of the insulated wire cores, and the third inner sheath is located on the outside of the second sub-shielding layer. Both the second and third inner sheaths are made of foamed polytetrafluoroethylene.

[0009] The power cord assembly consists of multi-strand stranded oxygen-free copper wire cores and a third sub-shielding layer. The power cord assembly also includes a fourth inner sheath, which is sleeved on the outside of the third sub-shielding layer and is made of cross-linked polyethylene.

[0010] The first and second sub-shielding layers adopt a double-layer shielding structure composed of aluminum foil and copper mesh, and the third sub-shielding layer is a double-shielding structure composed of aluminum foil shielding and tin-plated copper braided mesh.

[0011] The cross-sectional area of ​​the multi-stranded oxygen-free copper wire core is ≥2.5mm², and the twisted insulated wire core and the insulated wire core are made of silver-plated copper wire with an impedance of 50Ω.

[0012] By adopting the above technical solutions, the high-frequency high-speed signal line group uses silver-plated copper twisted-pair insulated wire cores. Its 50Ω impedance design is suitable for radar equipment. The twisting method reduces electromagnetic interference between the wire cores. The first sub-shielding layer adopts a double-layer shielding structure of aluminum foil and copper mesh, combined with the first inner sheath made of foamed polytetrafluoroethylene, which greatly reduces signal transmission loss and enhances the ability to resist external electromagnetic interference, ensuring stable and accurate transmission of high-frequency signals. The silver-plated copper insulated wire cores of the XLPE signal line group, together with the double-layer shielding and the second and third inner sheaths made of foamed polytetrafluoroethylene, ensure the reliable transmission of general signals and meet the diverse signal transmission needs of lidar.

[0013] In summary, the present invention has the following main advantages:

[0014] 1. In terms of signal transmission, this utility model uses silver-plated copper twisted-pair insulated wire cores for high-frequency and high-speed signal line groups. Its 50Ω impedance design is suitable for radar equipment. The twisting method reduces electromagnetic interference between wire cores. The first sub-shielding layer adopts a double-layer shielding structure of aluminum foil and copper mesh, combined with the first inner sheath made of foamed polytetrafluoroethylene, which greatly reduces signal transmission loss and enhances the ability to resist external electromagnetic interference, ensuring stable and accurate transmission of high-frequency signals. The silver-plated copper insulated wire cores of the XLPE signal line group, together with the double-layer shielding and the second and third inner sheaths made of foamed polytetrafluoroethylene, ensure reliable transmission of general signals and meet the diverse signal transmission needs of lidar.

[0015] 2. In terms of power supply, the cross-sectional area of ​​the multi-stranded oxygen-free copper wire core of the power cord group is ≥2.5mm², which can carry sufficient current and provide stable power support for radar equipment. The third sub-shielding layer adopts a double shielding structure of aluminum foil shielding and tin-plated copper braided mesh, combined with the fourth inner sheath made of cross-linked polyethylene, which effectively prevents the influence of external electromagnetic interference on the power cord, and at the same time avoids the electromagnetic interference generated by the power cord from affecting other signal lines, ensuring the stability of power supply and maintaining the normal operation of radar equipment.

[0016] 3. In terms of anti-interference performance, the total shielding layer is made of tin-plated copper braid with a coverage of ≥85%. With the synergistic effect of each sub-shielding layer, a multi-layer shielding system is built from the inside out to comprehensively resist external electromagnetic interference, greatly reduce signal crosstalk between different wire groups, significantly improve the overall electromagnetic compatibility of the cable, and lay a solid foundation for the stable operation of lidar in complex electromagnetic environments.

[0017] 4. In terms of environmental adaptability, the outer sheath of this utility model is made of weather-resistant polyurethane material. This material has excellent weather resistance, wear resistance and corrosion resistance, and can effectively resist harsh environments such as extreme outdoor temperatures, wind and rain, and strong winds at high altitudes. It prevents the cable from being damaged by environmental factors, extends the service life of the cable, reduces maintenance costs, ensures the long-term stable operation of the cable in various complex environments, and strongly guarantees the continuous operation of the lidar. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 2 This is an enlarged cross-sectional view of the high-frequency, high-speed signal line assembly of this utility model;

[0020] Figure 3 This is an enlarged cross-sectional view of the XLPE signal cable assembly of this utility model;

[0021] Figure 4 This is an enlarged cross-sectional view of the power cord of this utility model.

[0022] In the diagram: 1. High-frequency high-speed signal line group; 101. Twisted insulated core; 102. First sub-shielding layer; 103. First inner sheath; 104. Grounding wire; 2. XLPE signal line group; 201. Insulated core; 202. Second inner sheath; 203. Second sub-shielding layer; 204. Third inner sheath; 3. Power line group; 301. Multi-strand twisted oxygen-free copper core; 302. Third sub-shielding layer; 303. Fourth inner sheath; 4. Overall shielding layer; 5. Outer sheath; 6. Cable. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] Example 1

[0026] A new type of composite cable for lidar wind measurement modules, such as Figure 1-4 As shown, it includes cable 6, which is mainly composed of high-frequency high-speed signal line group 1, XLPE signal line group 2, power line group 3, overall shielding layer 4 and outer sheath 5.

[0027] The high-frequency and high-speed signal line group 1 is designed to meet the high-frequency signal transmission requirements of radar. The multiple pairs of twisted insulated wire cores 101 are made of silver-plated copper wire. This material has low resistance and good high-frequency transmission performance, which can effectively reduce the loss in the signal transmission process. Its impedance is designed to be 50Ω, which has a high degree of matching with radar equipment and ensures stable signal transmission. The twisting method can reduce electromagnetic interference between the wire cores and improve the accuracy of signal transmission.

[0028] The first sub-shielding layer 102 adopts a double-layer shielding structure composed of aluminum foil and copper mesh. The aluminum foil can effectively shield electric field interference, while the copper mesh has a good shielding effect on magnetic field interference. The combination of the two greatly enhances the ability to resist external electromagnetic interference.

[0029] The first inner sheath 103 is made of foamed polytetrafluoroethylene material, which has a low dielectric constant and good insulation properties, which can further improve the signal transmission quality and reduce the weight of the cable. The grounding wire 104 is located inside the first sub-shielding layer 102, providing a reliable grounding loop for high-frequency signals and enhancing the stability and anti-interference ability of signal transmission.

[0030] XLPE signal line group 2 is responsible for transmitting general signals. Multiple sets of insulated wire cores 201 are also made of silver-plated copper wire, which ensures the reliability of signal transmission. The second inner sheath 202 is sleeved on the outside of the insulated wire cores 201, and the third inner sheath 204 is set on the outside of the second sub-shielding layer 203. Both are made of foamed polytetrafluoroethylene, which plays a good role in insulation and protection, reducing loss and interference during signal transmission. The second sub-shielding layer 203 adopts a double-layer shielding structure of aluminum foil and copper mesh, which effectively shields external electromagnetic interference and ensures the accuracy of signal transmission.

[0031] Power cable group 3 provides stable power to radar equipment. The cross-sectional area of ​​the multi-stranded oxygen-free copper wire core 301 is ≥2.5mm². This design ensures that the cable can carry sufficient current to meet the power requirements of radar equipment. The third sub-shielding layer 302 adopts a double shielding structure composed of aluminum foil shielding and tinned copper braided mesh, which effectively prevents the power cable from being affected by external electromagnetic interference, and at the same time avoids the electromagnetic interference generated by the power cable from affecting other signal lines.

[0032] The fourth inner sheath 303 is fitted outside the third sub-shielding layer 302. It is made of cross-linked polyethylene and has good insulation and mechanical properties, protecting the power core and extending the cable's service life.

[0033] The main shielding layer 4 is made of tin-plated copper braid with a coverage of ≥85%, providing comprehensive shielding for the internal high-frequency high-speed signal cable group 1, XLPE signal cable group 2, and power cable group 3, further enhancing the overall anti-interference capability of the cable. The outer sheath 5 is made of weather-resistant polyurethane material, which has excellent weather resistance, abrasion resistance, corrosion resistance, and mechanical strength. It can effectively resist harsh outdoor environments, such as extreme temperatures, windy and rainy conditions, and strong winds at high altitudes, protecting the internal cables and ensuring long-term stable operation of the cable in complex environments.

[0034] Cable production process

[0035] In the cable production workshop, according to the design requirements, the high-frequency and high-speed signal line group 1 is produced first. Silver-plated copper wire is twisted into twisted insulated core 101, and the first sub-shielding layer 102 is wrapped around it. At the same time, the grounding wire 104 is installed, and then foamed polytetrafluoroethylene is extruded to make the first inner sheath 103.

[0036] Next, XLPE signal line group 2 is produced. The silver-plated copper wire is made into an insulated core 201, covered with a second inner sheath 202, wrapped with a second sub-shielding layer 203, and then a third inner sheath 204 is installed.

[0037] For power cable group 3, the multi-strand oxygen-free copper wire core 301 is wrapped around the third sub-shielding layer 302, and the fourth inner sheath 303 is put on. Then, the high-frequency high-speed signal line group 1, XLPE signal line group 2 and power cable group 3 are combined together, and tin-plated copper is braided on the outside to form the total shielding layer 4. Finally, weather-resistant polyurethane is extruded to form the outer sheath 5, and the production of cable 6 is completed.

[0038] Installation and Connection

[0039] At the wind measurement radar installation site, according to the interface type and layout of the radar equipment, connect one end of the integrated cable to the corresponding interface of the radar equipment. When connecting, ensure that the high-frequency high-speed signal cable group 1, XLPE signal cable group 2 and power cable group 3 are correctly connected to the corresponding interfaces to ensure a firm connection and avoid loosening. For example, the high-frequency high-speed signal cable group 1 is connected to the radar's high-frequency signal transmission interface, the XLPE signal cable group 2 is connected to the general signal transmission interface, and the power cable group 3 is connected to the power interface. During the connection process, take care to avoid excessive stretching, bending or squeezing of the cable to prevent damage to the internal structure of the cable.

[0040] Use and Maintenance

[0041] During the operation of the wind measurement radar, the appearance of the cable should be checked regularly to see if there is any damage or aging of the outer sheath. If any damage is found, it should be repaired or replaced in time to prevent the external environment from damaging the internal cables. At the same time, check whether the cable connection is loose to ensure the stability of signal transmission and power supply. At regular intervals, the electrical performance of the cable should be tested, including signal transmission quality and current carrying capacity of the power line, to ensure that the cable can work normally. If a decline in cable performance is found, the cause should be analyzed in time and corresponding measures should be taken, such as replacing the damaged wire group or repairing the shielding layer.

[0042] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A new type of integrated cable for a lidar wind finding module, comprising a cable (6), characterized in that: The cable (6) is composed of a high-frequency high-speed signal line group (1), an XLPE signal line group (2) and a power line group (3); The high-frequency high-speed signal line group (1), the XLPE signal line group (2) and the power line group (3) are provided with a total shielding layer (4) outside, the high-frequency high-speed signal line group (1) is composed of a plurality of groups of twisted insulated wire cores (101) and a first sub-shielding layer (102), and the plurality of groups of twisted insulated wire cores (101) are located inside the first sub-shielding layer (102), the XLPE signal line group (2) is composed of a plurality of groups of insulated wire cores (201) and a second sub-shielding layer (203), and the plurality of groups of insulated wire cores (201) are located inside the second sub-shielding layer (203), and the power line group (3) is composed of a plurality of twisted oxygen-free copper wire cores (301) and a third sub-shielding layer (302).

2. The novel integrated cable for lidar wind finding module according to claim 1, characterized in that: The high-frequency high-speed signal line group (1) further comprises a first inner sheath (103) and a grounding wire (104), the grounding wire (104) is located inside the first sub-shielding layer (102), and the first inner sheath (103) is made of foamed polytetrafluoroethylene material.

3. The novel integrated cable for lidar wind finding module as claimed in claim 1, wherein: The first sub-shielding layer (102) and the second sub-shielding layer (203) adopt a double-layer shielding structure composed of aluminum foil and copper mesh, and the third sub-shielding layer (302) is a double shielding structure composed of aluminum foil shielding and tinned copper woven mesh.

4. The novel integrated cable for lidar wind finding module according to claim 1, characterized in that: The total shielding layer (4) is provided with an outer sheath (5) outside, the total shielding layer (4) adopts a shielding structure woven by tinned copper, the coverage rate of the total shielding layer (4) is greater than or equal to 85%, and the outer sheath (5) is made of weather-resistant polyurethane material.

5. The novel integrated cable for lidar wind finding module according to claim 1, characterized in that: The XLPE signal line group (2) further comprises a second inner sheath (202) and a third inner sheath (204), the second inner sheath (202) is sleeved outside the insulated wire core (201), and the third inner sheath (204) is arranged outside the second sub-shielding layer (203), and the second inner sheath (202) and the third inner sheath (204) are made of foamed polytetrafluoroethylene.

6. The novel integrated cable for lidar wind finding module according to claim 1, characterized in that: The power line group (3) further comprises a fourth inner sheath (303), and the fourth inner sheath (303) is sleeved outside the third sub-shielding layer (302), and the fourth inner sheath (303) is made of cross-linked polyethylene.

7. The novel integrated cable for lidar wind finding module according to claim 1, wherein: The cross-sectional area of the plurality of twisted oxygen-free copper wire cores (301) is greater than or equal to 2.5 mm², the twisted insulated wire core (101) and the insulated wire core (201) adopt silver-plated copper wire, and the impedance of the silver-plated copper wire is 50Ω.

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