Vehicle-mounted photoelectric turret mast mixed loading spring cable design method and mixed loading spring cable

Abstract

The invention provides a vehicle-mounted photoelectric turret mast mixed loading spring cable design method and a mixed loading spring cable. The method comprises the following steps: firstly, determining the electrical type selection and electrical connection relation of the mast mixed loading spring cable; the physical form of the mast mixed loading spring cable is designed, and the mast mixed loading spring cable comprises a coiling part with elastic stretching in the middle and non-coiling parts at the two ends; calculating the winding pitch diameter and the winding number of turns of the mast mixed spring cable winding part, and determining the length of a non-winding part; and finally obtaining the total length of the mast mixed spring cable. According to the method, an elastic telescopic structure is adopted to design a winding part of the mast mixed cable, so that the winding part can freely stretch along with lifting of the mast, the dynamic adaptability is higher, and breakage or deformation of the mast mixed cable caused by excessive stretching can be avoided; the coiling part can also prevent the mast mixed-loading cable from being twisted with the mast, avoids damage to the internal cable due to surface abrasion caused by repeated bending, prolongs the service life, can also reduce the space occupancy, and enables the stress distribution to be more uniform.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle-mounted optoelectronic equipment integration, and in particular relates to a design method for a vehicle-mounted optoelectronic turret mast mixed-installed spring cable and a vehicle-mounted optoelectronic turret mast mixed-installed spring cable. Background Art

[0002] The on-board optoelectronic turret mast cable serves as a key channel connecting the optoelectronic turret on the mast with the equipment inside the vehicle, and it undertakes the important tasks of power supply and information transmission. It is a special form of on-board cable, coiled on the mast, and is the longest and most complex cable among on-board cables. The cable integrates multiple types of cables, including optical fibers, power cables, signal cables, etc. Due to their different physical properties, the performance requirements of various types of cables vary significantly. At the same time, during the mast raising and lowering process, the mast cable needs to continuously switch between tension and compression states, which requires that the mast cable cannot be entangled with the mast, and the mast cable itself and its connecting parts cannot be damaged by external forces. In addition, the mast cable must also participate in the electromagnetic compatibility test of the entire vehicle and must meet strict electromagnetic compatibility standards.

[0003] Currently, existing on-board photovoltaic turret mast cables still have many drawbacks in practical applications. Due to their complex structure and diverse cable types, it is difficult to effectively prevent the mast-mounted cables from becoming entangled with the mast during tension and compression, and it is also difficult to fully protect the cables and their connecting components from external damage. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problem in the prior art that mast cables and mast assemblies are prone to entanglement, which affects their use, and to provide a design method for a vehicle-mounted photoelectric turret mast mixed spring cable and a vehicle-mounted photoelectric turret mast mixed spring cable.

[0005] To achieve the above objectives, the technical solutions provided by the present invention are:

[0006] A design method for a hybrid spring cable for a vehicle-mounted optoelectronic turret mast is provided, comprising the following steps:

[0007] Step 1: Determine the electrical selection and electrical connection relationship of the mast mixed spring cable;

[0008] Step 2: Design the electromagnetic compatibility of mast hybrid spring cables;

[0009] Step 3: Design the physical form of the mast hybrid spring cable; the mast hybrid spring cable includes an elastically retractable coiled portion in the middle and non-coiled portions at both ends;

[0010] Step 4: Calculate and determine the coiling median diameter and number of coils of the mast's mixed spring cable coiling portion;

[0011] Step 5: Determine the length of the non-coiled portion of the mast's hybrid spring cable at both ends based on the stacking thickness of the coiled portion when the cable is not deployed, the height of the mast after retraction, and the distance between the mast's hybrid spring cable and the equipment on the mast and on the vehicle.

[0012] Step 6: Calculate the total length of the mast hybrid spring cable based on the lengths of the coiled portion and the non-coiled portion.

[0013] Furthermore, in step 3, a spring steel wire is extended along the length direction of the cable body of the mast mixed spring cable coiling part, and the cable body and the spring steel wire are combined into one cable, thereby realizing elastic expansion and contraction of the coiling part through the spring steel wire.

[0014] Furthermore, in step 4, the specific steps include:

[0015] Step 4.1: Establish the mechanical equations for the spiral expansion and elastic deformation of the coiled portion when the mast is raised, set the number of coils, and calculate the median diameter of the coiled portion:

[0016] N=k×△×G×d1 4 / (8×F×D1 3 )

[0017] Where N represents the number of coils of the coiled part, k represents the safety margin factor of the spring steel wire, △ represents the height difference of the mast, G represents the shear modulus of the spring steel wire, d1 represents the diameter of the spring steel wire, F represents the maximum tensile force of the mast top on the mast mixed spring cable, and D1 represents the coiled mean diameter of the coiled part;

[0018] Step 4.2: Determine whether the coiling mean diameter calculated in step 4.1 and the set number of coiling turns meet the following two conditions. If so, confirm the coiling mean diameter and the number of coiling turns. If not, return to step 4.1, add 1 to the set number of coiling turns, and recalculate the coiling mean diameter:

[0019] L m =πD1×N≥△

[0020] M≥D1≥D+d+L s

[0021] Among them L m It represents the total length of the coiled part, M represents the outer envelope diameter of the equipment installed on the mast, D represents the mast diameter, d represents the diameter of the mast mixed spring cable before stretching, and Ls represents the safety distance between the coiled part and the mast.

[0022] Furthermore, in step 5, the length of the non-coiled portion should satisfy:

[0023] L P +L D +N×d≥H0

[0024] Among them L P Indicates the distance between the mast mixed spring cable and the upper installation equipment of the mast, L D It indicates the distance between the mast's mixed spring cable and the equipment installed in the vehicle below the mast. H0 indicates the height of the mast after retraction.

[0025] Furthermore, in step 1, the electrical selection of the mast mixed spring cable includes connector selection and wire selection; the connector of the mast mixed spring cable is selected according to the socket model of the optoelectronic turret and the in-vehicle equipment; the connector of the optical fiber cable inside the mast mixed spring cable selects an RF connector; the power supply wire is selected according to the withstand voltage value and current carrying capacity; the wire for transmitting signals includes ordinary signal lines and differential signal lines, and the wire for transmitting signals is selected according to the signal definition, contact resistance and sensitivity to electromagnetic interference.

[0026] Furthermore, in step 2, the differential signal line is twisted in a pair and covered with a shielding layer, the outside of the entire mast mixed spring cable is covered with a metal wave-proof sleeve, the braiding density of the metal wave-proof sleeve is greater than or equal to 95%, and the outside of the metal wave-proof sleeve is covered with a rubber protective sleeve.

[0027] Also provided is a vehicle-mounted photoelectric turret mast mixed spring cable, which is designed using the above-mentioned mast mixed spring cable design method.

[0028] The advantages of the present invention are:

[0029] 1. The design method of the vehicle-mounted optoelectronic turret mast hybrid spring cable proposed in the present invention adopts an elastic and retractable structure to design the winding part of the mast hybrid cable, so that the winding part can freely retract and retract as the mast is raised and lowered, and has stronger dynamic adaptability, thereby preventing the mast hybrid cable from being broken or deformed due to excessive stretching; in addition, the winding part can prevent the mast hybrid cable from being entangled with the mast, avoiding repeated bending that causes surface wear and damage to the internal cables, thereby increasing its service life; at the same time, it can also reduce the space occupancy rate; taking into account elastic deformation and space limitations, making the stress distribution more uniform.

[0030] 2. The present invention adopts a systematic design for the coiling part, and coordinates the number of coils and the coiling diameter of the mast mixed spring cable to obtain a directly usable number of coils and coiling diameter, so that the installation does not require repeated debugging. Compared with the traditional design, it reduces the debugging time and reduces the debugging cost.

[0031] 3. Compared to existing mast-mounted hybrid cables, the present invention's vehicle-mounted photovoltaic turret mast hybrid spring cable significantly enhances the mast-mounted hybrid cable's dynamic adaptability due to the provision of an elastically retractable coiled portion. This design effectively prevents the mast-mounted hybrid cable from being overstretched and entangled with the mast, thereby extending the mast-mounted hybrid cable's service life and reducing space usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The features and advantages of the present invention will become more readily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and in which some features are exaggerated or minimized to show details of particular components.

[0033] Figure 1 It is a schematic diagram of the physical form of the mast hybrid spring cable of the present invention;

[0034] Figure 2 yes Figure 1 A top view of

[0035] Figure 3 This is a schematic diagram of the relationship between the diameters of the mast's hybrid spring cable and the mast of the present invention;

[0036] Figure 4 This is a design flow chart of the mast hybrid spring cable coiling portion of the present invention;

[0037] Figure 5 Schematic diagram of the total length of the mast hybrid spring cable of the present invention;

[0038] In the figure, 1 is the first non-coiled portion; 2 is the coiled portion; 3 is the second non-coiled portion. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration and is not intended to limit the present invention.

[0040] In order to solve the problem that the existing mast cable and mast assembly are prone to entanglement and thus affect its use, the present invention provides a design method for a mast mixed-installed spring cable of a vehicle-mounted photoelectric turret.

[0041] The present invention provides a design method for a vehicle-mounted photoelectric turret mast hybrid spring cable, comprising:

[0042] Step 1: Determine the electrical selection and electrical connection relationship of the mast mixed spring cable;

[0043] Step 2: Design the electromagnetic compatibility of mast hybrid spring cables;

[0044] Step 3: Design the physical form of the mast hybrid spring cable; the mast hybrid spring cable includes an elastically contractible coiled portion 2 in the middle and a first non-coiled portion 1 and a second non-coiled portion 3 at both ends;

[0045] Step 4: Calculate and determine the coiling median diameter and number of coiling turns of the mast hybrid spring cable coiling portion 2;

[0046] Step 5: Determine the length of the non-coiled portion of the mast's hybrid spring cable at both ends based on the stacking thickness of the coiled portion when the cable is not deployed, the height of the mast after retraction, and the distance between the mast's hybrid spring cable and the equipment on the mast and on the vehicle.

[0047] Step 6: Calculate the total length of the mast hybrid spring cable based on the lengths of the coiled portion 2 , the first non-coiled portion 1 , and the second non-coiled portion 3 .

[0048] The mast-mounted spring cable designed in this embodiment has stronger dynamic adaptability, can prevent the mast-mounted spring cable from being entangled with the mast, and reduce damage to the mast-mounted spring cable from external forces. Specifically: the coiling part 2 adopts an elastic and retractable structure design, which can freely retract and retract as the mast is raised and lowered, avoiding breakage or deformation of the mast mixed spring due to excessive stretching or accidental overload; the coiling part 2 can actively guide the retraction path of the mast mixed spring cable, ensuring that it maintains a safe distance from the main structure of the mast during the dynamic process, effectively preventing the mast mixed spring and the mast from being entangled with each other. More importantly, this controlled motion trajectory significantly reduces the number and amplitude of repeated, small-radius bending experienced by the cable during the retraction process, avoiding repeated bending and causing wear on its surface, effectively protecting the internal cables carrying signals and power from damage, and significantly extending the service life of the mast mixed spring cable; at the same time, the coiling part 2 structure achieves a highly compact morphological transformation between the extended and retracted states. Compared with traditional cables, the mast mixed spring cable significantly reduces the space occupancy rate, takes into account elastic deformation and space limitations, makes the stress distribution more uniform, and has stronger dynamic adaptability. The coiling part 2 adopts a systematic design, and the number of coiling turns and the coiling middle diameter of the mast mixed spring cable are collaboratively designed, which can obtain directly usable number of coiling turns and coiling middle diameter, so that the installation does not require repeated debugging. Compared with the traditional design, it reduces the debugging time and reduces the debugging cost.

[0049] Below, each step is described in detail.

[0050] In step 1, the electrical selection of the mast mixed spring cable includes connector selection and wire selection; one end of the mast mixed spring cable is connected to the photoelectric turret, and the other end is connected to the on-board equipment. According to the socket models on the photoelectric turret and the on-board equipment, the plug connector model used to make the mast mixed spring cable is selected, and the socket and the plug are in a dual relationship.

[0051] In this embodiment, the power socket model number of the photoelectric turret installed on the mast is JY27468T23F36PN, so the plug connector model number of the mast hybrid spring cable connecting to the photoelectric turret is JY27467T23F36SN-HU, and the accessory model number is JY599I23FJA00F-25.4. The terminal definitions of the photoelectric turret power socket are: Terminal A is Power+, and Terminal B is PowerGND. The power socket model number of the in-vehicle device is JY27468T23F34PN, so the connector model number of the mast hybrid spring cable connecting to the in-vehicle device is JY27467T23F34SN-HU, and the accessory model number is JY599I23FJA00F-25.4. The terminal definitions of the in-vehicle device socket are: Terminal A is Power+, and Terminal B is PowerGND.

[0052] The signal transmission sockets on both the optoelectronic turret and the vehicle-mounted equipment are both model JY27508E10F35SN-H. Therefore, the plugs on both ends of the mast's hybrid spring cable are model JY27484T10F35PN-H. The signal transmission sockets on both the optoelectronic turret and the vehicle-mounted equipment are both defined as follows: Terminal 1 is for transmit, Terminal 2 is for receive, and Terminal 3 is for signal GND.

[0053] The connector for the optical fiber cable inside the mast's mixed spring cable is an RF connector. The optical fiber socket on the optoelectronic turret is an SMA-KFD RF coaxial connector, and the optical fiber socket on the in-vehicle equipment is an SMA-KFD RF coaxial connector. Therefore, the connectors at both ends of the optical fiber cable are SMA-J3-5. The characteristic impedance of the SMA-KFD RF coaxial connector is 50Ω, and it must be compatible with an SFF-50-1.5-1 wire.

[0054] According to the definition relationship between the plugs and corresponding sockets at both ends of the mast mixed spring cable, the definition of the mast mixed spring cable can be obtained, as shown in the following table:

[0055] Table 1 Definition of mast mixed spring cable

[0056]

[0057] The power supply wire is selected according to the withstand voltage and current carrying capacity. The power cord is made of silver-plated copper core polyperfluoroethylene propylene high temperature resistant 0.2mm 2 The wires for transmitting signals are selected based on the signal definition, contact resistance and sensitivity to electromagnetic interference; ordinary signal wires use silver-plated copper core polyperfluoroethylene propylene high temperature resistant 0.15mm 2 Cross-section conductor, differential signal line uses silver-plated copper core polyperfluoroethylene propylene plus shielding layer high temperature resistant 0.15mm 2 Cross-section of the wire.

[0058] In step 2, in order to meet the electromagnetic compatibility requirements of the mast mixed spring cable, the differential signal line that is susceptible to interference is twisted in a pair and covered with a shielding layer. The outside of the entire mast mixed spring cable is covered with a metal wave-proof sleeve. In this embodiment, there are two layers, and the weaving density of each metal wave-proof sleeve is greater than or equal to 95%. The shielding layer and the ends of the metal wave-proof sleeve both wrap the metal shell of the mast mixed spring cable connector to ensure 360° electrical connection. In order to prevent the metal wave-proof sleeve from being oxidized by rain and increase wear resistance, a rubber protective sleeve is provided on the outside of the metal wave-proof sleeve.

[0059] In step 3, according to the connection relationship, the mast mixed spring cable ends are divided into six. Except for the optical fiber cables which are bundled separately, the power lines and signal transmission wires are bundled separately inside the other cables.

[0060] like Figure 1 、 2 As shown, in order to match the movement state of the mast and facilitate the connection between the two ends of the mast hybrid spring cable and the equipment, the middle part of the mast hybrid spring cable body is designed as a coiled cable similar to the shape of a spring, and the optical fiber cable is clamped in the middle part of the cable body and is also coiled. The cable body of the coiled part 2 is wound with spring steel wire along its length. The elastic expansion and contraction of the winding part is achieved by the spring steel wire, and the cable body and the spring steel wire are combined into one cable. By utilizing the elasticity of the spring steel wire and the expansion and contraction of the spring, the mast hybrid spring cable follows the rise and fall of the mast, rises and falls smoothly, and does not interfere with other equipment. In order to facilitate the connection with the corresponding equipment, the mast hybrid spring cable near the two ends does not have spring steel wire inside and is in a soft, non-coiled form.

[0061] In step 4, the number of coils and the coiling diameter of the coiled portion 2 are designed in a coordinated manner, and parameters that can be directly implemented are provided so that the installation does not require repeated debugging. The specific steps include:

[0062] Step 4.1: Establish the mechanical equations for the spiral expansion and elastic deformation of the coiled portion 2 when the mast is raised, set the number of coils, and calculate the median diameter of the coiled portion 2:

[0063] N=k×△×G×d1 4 / (8×F×D1 3 ) (1)

[0064] Where N represents the number of coils of the coiled part 2, k represents the safety margin coefficient of the spring steel wire, △ represents the height difference of the mast, G represents the shear modulus of the spring steel wire, d1 represents the diameter of the spring steel wire, F represents the maximum tensile force of the mast top on the mast mixed spring cable, and D1 represents the coiled middle diameter of the coiled part 2.

[0065] Step 4.2: Determine whether the calculated coiling diameter and the set number of coiling turns in step 4.1 satisfy the following two conditions. If the formula is satisfied, the coiling diameter and the number of coiling turns are confirmed. If not, return to step 4.1, set the number of coiling turns to 1, recalculate the coiling diameter, and continue until the coiling diameter and the number of coiling turns that satisfy the following two conditions appear:

[0066] (1) To ensure the feasibility of mechanical deployment, the coiling length of the coiling part 2 obtained by the coiling diameter calculated in step 4.1 covers at least the lifting height difference of the mast, i.e.:

[0067] L m = πD1×N≥△ (2)

[0068] (2) Ensure the safety distance between the mast mixed spring cable and the mast, as shown in formula (3), and the coiling diameter calculated in step 4.1 does not exceed the outer envelope diameter of the equipment installed on the mast, i.e.: Figure 3

[0069] M≥D1≥D+d+L s (3)

[0070] where L m represents the total length of the coiling part 2, M represents the outer envelope diameter of the equipment installed on the mast, D represents the diameter of the mast, d represents the diameter of the mast mixed spring cable before stretching, and Ls represents the safety distance between the coiling part 2 and the mast, which is empirically valued at 0.08m.

[0071] In this embodiment, the coiling part 2 uses a dual model coupling algorithm combining spring force model and geometric constraints, taking into account both elastic deformation and spatial constraints, resulting in more uniform stress distribution and stronger dynamic adaptability.

[0072] In this embodiment, considering the number of cables, cross-sectional area, metal wavebreaker, and outer wrapping rubber in the mast mixed spring cable, the following parameters are preset: d = 0.04m, D = 0.3m, the height of the mast after contraction H0 is 1.6m, the height of the mast after lifting H1 is 6.0m, then△ = 4.4m, d1 = 0.007m, F = 140N, G = 80Gpa, M = 0.66m, k = 2.5.

[0073] The process of calculating and determining the coiling diameter and the number of coiling turns is shown in formula (4). The number of coiling turns N of the coiling part 2 is an integer, and N starts from 1. Calculate D1 according to formula (1): Figure 4

[0074] N = 2.5×4.4×80×10 9 ×(0.007) 4 / (8×140×D1 3 ) ​​

[0075] Determine whether the obtained D1 satisfies the two conditions of formulas (2) and (3):

[0076] 3.14D1×N≥4.4

[0077] 0.66≥D1≥0.3+0.04+0.08

[0078] If the above conditions are not met, return to formula (1), add 1 to N, recalculate D1, and again determine whether the obtained D1 and N meet formulas (2) and (3). Repeat the cycle until the calculated D1 and N meet formulas (2) and (3); the final calculation is N = 6, D1 = 0.68m.

[0079] In step 5, the lengths of the first non-coiled portion 1 and the second non-coiled portion 3 at both ends of the mast mixed spring cable are fine-tuned based on actual measurements. The lengths of the first non-coiled portion 1 and the second non-coiled portion 3 should meet the following requirements: before the mast is unfolded, the total length of the mast mixed spring cable can cover the mast height, so that both ends of the mast mixed spring cable are not subject to pulling force, that is, the distance L between the mast mixed spring cable and the upper mounting equipment of the mast P , the distance L between the mast mixed spring cable and the equipment installed in the vehicle below the mast D The sum of the stacking thickness N×d of the mast mixed spring cable coiled portion when the cable is not deployed is at least greater than H0. It can be expressed as:

[0080] L P +L D +N×d≥H0

[0081] Among them L P The measured distance is 0.9m, L D The measured distance is 0.6m. Then calculate:

[0082] L P +L D + N × d = 0.9 + 0.6 + 6 × 0.04 = 1.74 ≥ 1.6

[0083] It is determined that the lengths of the first non-coiled portion 1 and the second non-coiled portion 3 satisfy the conditions.

[0084] In step 6, if Figure 5 As shown, the final total length of the mast mixed spring cable is: L = 0.9 + 0.6 + 3.14 × 6 × 0.68 = 14.3m.

[0085] This embodiment also provides a vehicle-mounted optoelectronic turret mast mixed spring cable designed using the above-mentioned mast mixed spring cable design method.

[0086] Compared to existing mast-mounted hybrid cables, the vehicle-mounted photovoltaic turret mast hybrid spring cable of the present invention significantly enhances the mast-mounted hybrid cable's dynamic adaptability due to the provision of an elastically retractable coiled portion. This design effectively prevents the mast-mounted hybrid cable from being overstretched and entangled with the mast, thereby extending the mast-mounted hybrid cable's service life and reducing space usage.

[0087] Finally, it should be noted that the features mentioned and / or illustrated in the above description of the exemplary embodiments of the present invention may be incorporated into one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for corresponding features in other implementations. The technical solutions obtained by such combination or substitution shall also be deemed to be included in the scope of protection of the present invention.

Claims

1. A design method for a vehicle-mounted photoelectric turret mast hybrid spring cable, characterized in that: The following steps are involved: Step 1: Determine the electrical selection and electrical connection relationship of the mast mixed spring cable; Step 2: Design the electromagnetic compatibility of mast hybrid spring cables; Step 3: Design the physical form of the mast hybrid spring cable; the mast hybrid spring cable includes an elastically retractable coiled portion in the middle and non-coiled portions at both ends; Step 4: Calculate and determine the coiling median diameter and number of coils of the mast's mixed spring cable coiling portion; Step 5: Determine the length of the non-coiled portion of the mast's hybrid spring cable at both ends based on the stacking thickness of the coiled portion when the cable is not deployed, the height of the mast after retraction, and the distance between the mast's hybrid spring cable and the equipment on the mast and on the vehicle. Step 6: Calculate the total length of the mast hybrid spring cable based on the lengths of the coiled portion and the non-coiled portion.

2. The mast hybrid spring cable design method according to claim 1, characterized in that: In step 3, a spring steel wire is extended along the length direction of the cable body of the mast mixed spring cable coiling part, and the cable body and the spring steel wire are combined into one cable, thereby realizing elastic expansion and contraction of the coiling part through the spring steel wire.

3. The mast hybrid spring cable design method according to claim 2, characterized in that: In step 4, the specific steps include: Step 4.1: Establish the mechanical equations for the spiral expansion and elastic deformation of the coiled portion when the mast is raised, set the number of coils, and calculate the median diameter of the coiled portion: N=k×△×G×d1 4 / (8×F×D1 3 ) Where N represents the number of coils of the coiled part, k represents the safety margin factor of the spring steel wire, △ represents the height difference of the mast, G represents the shear modulus of the spring steel wire, d1 represents the diameter of the spring steel wire, F represents the maximum tensile force of the mast top on the mast mixed spring cable, and D1 represents the coiled mean diameter of the coiled part; Step 4.2: Determine whether the winding center diameter calculated in step 4.1 and the set number of winding turns meet the following two conditions. If so, determine the winding center diameter and the number of winding turns. If not, return to step 4.1, add 1 to the set number of winding turns, and recalculate the winding center diameter: L m =πD1×N≥△ M≥D1≥D+d+L s Among them L m It represents the total length of the coiled part, M represents the outer envelope diameter of the equipment installed on the mast, D represents the mast diameter, d represents the diameter of the mast mixed spring cable before stretching, and Ls represents the safety distance between the coiled part and the mast.

4. The mast hybrid spring cable design method according to claim 3, characterized in that: In step 5, the length of the non-coiled portion should meet the following requirements: L P +L D +N×d≥H0 Among them L P Indicates the distance between the mast mixed spring cable and the upper installation equipment of the mast, L D It indicates the distance between the mast's mixed spring cable and the equipment installed in the vehicle below the mast. H0 indicates the height of the mast after retraction.

5. The mast hybrid spring cable design method according to claim 1, characterized in that: In step 1, the electrical selection of mast hybrid spring cable includes connector selection and conductor selection; The connector of the mast mixed spring cable is selected according to the socket model of the optoelectronic turret and the vehicle equipment; the connector of the optical fiber cable inside the mast mixed spring cable is a radio frequency connector; The wires for power supply are selected according to the withstand voltage and current carrying capacity; the wires for transmitting signals include ordinary signal wires and differential signal wires, and the wires for transmitting signals are selected according to the signal definition, contact resistance and sensitivity to electromagnetic interference.

6. The mast hybrid spring cable design method according to claim 5, characterized in that: In step 2, the differential signal line is twisted in a pair and covered with a shielding layer. The outside of the entire mast mixed spring cable is covered with a metal wave-proof sleeve. The braiding density of the metal wave-proof sleeve is greater than or equal to 95%, and the outside of the metal wave-proof sleeve is covered with a rubber protective sleeve.

7. A vehicle-mounted photoelectric turret mast hybrid spring cable, characterized in that: The mast hybrid spring cable is designed using the design method of any one of claims 1 to 6.

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