A cable arrangement method and system based on winding coefficient

Abstract

The present invention relates to the field of three-dimensional ship design, and discloses a cable arrangement method and system based on a winding coefficient, the method comprising the steps of: selecting the positions of cable supports adjacent to the start, end and branch of a cable channel as cable arrangement reference points; calculating the cable arrangement based on the winding coefficient; generating a physical cable model according to the cable arrangement; and completing the cable wiring diagram design according to the generated physical cable model. The system comprises: an arrangement reference selection unit, a cable arrangement calculation unit, a physical cable generation unit, and a wiring diagram generation unit. The beneficial effects of the present invention are: realizing the automatic generation of physical cables, reducing the workload of manual cable arrangement and modeling, improving the refinement of the design of digital prototypes of ships, and reducing the distortion, intersection and winding in the cable arrangement process.

Description

Technical Field

[0001] The present invention relates to the field of three-dimensional ship design, and in particular to a cable arrangement method and system based on winding coefficient. Background Art

[0002] The ship electrical 3D design does not draw a solid cable model. Instead, a channel model with a rectangular cross-section is used to occupy space, and the cable path is expressed based on the center line of the channel. Ultimately, cable lists, cable wiring diagrams, bracket layout diagrams, equipment layout diagrams and other materials are output to guide cable laying.

[0003] The above design method lacks the design link for cable arrangement in the channel. During the on-site construction process, there is a lack of effective guidance for cable wiring in the bracket. Wiring can only rely on the workers' experience, which will lead to the following three types of problems:

[0004] First, it is difficult to comprehensively consider factors such as cable classification, length, and direction during the construction process, and it is impossible to plan the layout from a global perspective, resulting in increased cable distortion, increased probability of entanglement, and lower heat dissipation efficiency;

[0005] Second, during the on-site wiring process, the purpose is mostly to lay cables for a single device, and the construction conditions and progress of other equipment are rarely considered, which may affect the construction of subsequent equipment cables;

[0006] Third, considering the locality of the situation during on-site wiring will lead to disorganized cable layout and excessive or low bracket filling rates.

[0007] At present, ship electrical engineers analyze cable lists, cable wiring diagrams, bracket layout diagrams, equipment layout diagrams and other materials, and manually draw cable wiring diagrams based on bracket cross-sections to guide construction, thereby reducing the twisting and entanglement that occurs during cable wiring and optimizing the cable layout position and bracket filling rate.

[0008] However, due to the complex types, large number, different sizes and specifications of cables, manual cable arrangement is not only tedious, time-consuming and labor-intensive, but the rationality of the wiring depends largely on the experience of electrical engineers. Therefore, how to quickly and effectively realize cable wiring design has become an urgent problem to be solved in electrical three-dimensional design. Summary of the invention

[0009] The purpose of the present invention is to propose a cable arrangement method and system based on winding coefficient to solve the technical problem that the prior art cannot quickly and effectively realize the electrical three-dimensional design of cable wiring.

[0010] A cable arrangement method based on winding coefficient comprises the following steps:

[0011] S1: Select the cable support position adjacent to the start, end and branch of the cable channel as the cable arrangement reference point;

[0012] S2: Calculate cable arrangement based on winding coefficient;

[0013] S3: Generate a physical cable model according to the cable arrangement;

[0014] S4: Complete the cable wiring diagram design based on the generated physical cable model.

[0015] A cable arrangement system based on winding coefficient, comprising:

[0016] Arrangement reference selection unit: select the cable support position adjacent to the start, end and branch of the cable channel as the cable arrangement reference point;

[0017] Cable arrangement calculation unit: calculates cable arrangement based on winding coefficient;

[0018] Physical cable generation unit: generates physical cable model according to cable arrangement;

[0019] Wiring diagram generation unit: completes the cable wiring diagram design based on the generated physical cable model.

[0020] The beneficial effects provided by the present invention are as follows: the incoming and outgoing line positions in the ship's cable channel are selected as wiring references, and a cable arrangement method based on a winding coefficient is used to carry out cable wiring design on the reference, thereby realizing automatic generation of physical cables, reducing the workload of manual cable arrangement and modeling, improving the refinement of ship digital prototype design, and reducing distortion, intersection and winding in the cable arrangement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic flow chart of the method of the present invention;

[0022] Figure 2 It is a schematic diagram for selecting the cable arrangement benchmark;

[0023] Figure 3 It is a schematic diagram of the solid cable model;

[0024] Figure 4 It is a schematic diagram of the cable wiring diagram;

[0025] Figure 5 It is a schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0027] Before formally describing the present invention, the scheme of the present invention is first generally described for easy understanding.

[0028] Please refer to Figure 1 , Figure 1 It is a schematic flow diagram of the method of the present invention;

[0029] The present invention provides a cable arrangement method based on winding coefficient, comprising the following steps:

[0030] S1: Select the cable support position adjacent to the start, end and branch of the cable channel as the cable arrangement reference point;

[0031] Please refer to Figure 2 , Figure 2 It is a schematic diagram for selecting the cable arrangement benchmark;

[0032] It should be noted that the reason for the change in the arrangement position of the cable in the channel is the occurrence of incoming or outgoing lines. Therefore, the incoming and outgoing line positions such as the start, end and branch of the channel are the critical points for changes in the cable arrangement. Selecting the cable bracket adjacent to the critical point as a reference for cable arrangement design can effectively guide cable wiring.

[0033] In the process of ship electrical 3D design, after determining the cable path direction, support size specifications and layout position through electrical equipment layout, channel modeling, laying calculation and support layout, the cable support position adjacent to the start, end and branch of the cable channel is selected as the cable arrangement reference.

[0034] S2: Calculate cable arrangement based on winding coefficient;

[0035] It should be noted that step S2 is specifically as follows:

[0036] S21. Model the cable channel according to the construction standard of the hull structure;

[0037] S22. When the cables are branched in the channel, they should be arranged according to the principle of short on top and long on bottom;

[0038] S23. Based on the greedy principle, the solution with the smallest winding coefficient δ is selected for each reference point for arrangement.

[0039] It should be noted that according to the electrical design requirements, different voltage levels use different cable channels or have a certain spacing. Therefore, when calculating the cable laying path, high-voltage, medium-voltage and low-voltage cables, DC and AC cables, electrical, instrument and communication cables should be separated. After the cable laying path calculation is completed, the channel specifications should be optimized according to the cable specifications and quantity in the channel so that the channel fill rate is between 1 / 3 and 2 / 3.

[0040] During the cable arrangement process, the main considerations are to facilitate the subsequent routing and reduce cable twisting and entanglement. The specific arrangement method is as follows:

[0041] a. When the channel is constructed based on the hull structure such as deck, bulkhead, metal enclosure, etc., it must be modeled strictly in the X, Y, and Z axis directions. The channel uses ┴, ┬-shaped structures for branching, and polygonal branch structures such as ┼, ￥, etc. are not allowed;

[0042] b. When the cable branches from one channel to another, the newly entered cables should be arranged based on the existing space in the channel, following the principle of placing the cables with the last exit in the middle, the cables with the first exit on both sides, the short cables on the top, and the long cables on the bottom;

[0043] c. Except for the starting position of the channel, for the cables in the same row of the reference points, if the cables close to the branch side do not come out when the cables come out, the cables will be twisted and entangled. To reduce the twisting and entanglement of the cables, based on the greedy principle, each reference point selects the solution with the smallest winding coefficient δ for arrangement.

[0044] The winding coefficient δ is calculated as follows:

[0045]

[0046] Where δ is the twist winding coefficient of the reference point, n is the number of cables arranged at the reference point, and s i is the number of cables on the same layer that the i-th cable at the reference point crosses when it is adjacent to the branch line.

[0047] S3: Generate a physical cable model according to the cable arrangement;

[0048] Please refer to Figure 3 , Figure 3 It is a schematic diagram of the solid cable model.

[0049] It should be noted that after completing the calculation of the cable arrangement of the reference point, a spline is used to connect the centers of the same cable in adjacent arrangement references to form a curve connecting the starting and ending points of the channel in the channel. This curve is used as the actual path of the cable, and the cable cross-sectional diameter is determined according to the cable specifications and models. A columnar solid cable model is generated in the channel based on the cable cross-sectional diameter and the cross-sectional center path.

[0050] S4: Complete the cable wiring diagram design based on the generated physical cable model.

[0051] Please refer to Figure 4 , Figure 4 It is a schematic diagram of the cable wiring diagram;

[0052] It should be noted that after the physical cable is generated, the location of each cable support is selected, and the channel is cut perpendicularly to generate a cross-sectional view of the channel containing the cable. At the same time, the cables in the support and channel sections are marked to generate a cable wiring diagram for guiding on-site construction.

[0053] Please refer to Figure 5 , Figure 5 It is a schematic diagram of the system structure of the present invention;

[0054] A cable arrangement system based on winding coefficient, comprising:

[0055] Arrangement reference selection unit: select the cable support position adjacent to the start, end and branch of the cable channel as the cable arrangement reference point;

[0056] Cable arrangement calculation unit: calculates cable arrangement based on winding coefficient;

[0057] The specific processing process of the cable arrangement calculation unit is as follows: the cable channel is modeled according to the construction standard of the hull structure; when the cable branches in the channel, it is arranged according to the principle of short up and long down; based on the greedy principle, the solution with the smallest winding coefficient δ is selected for each reference point for arrangement.

[0058] In the cable arrangement calculation unit, the winding coefficient δ is calculated as follows:

[0059]

[0060] Where δ is the twist winding coefficient of the reference point, n is the number of cables arranged at the reference point, and s i is the number of cables on the same layer that the i-th cable at the reference point crosses when it is adjacent to the branch line.

[0061] Physical cable generation unit: generates physical cable model according to cable arrangement;

[0062] The specific processing process of the entity cable generation unit is as follows: use splines to connect the centers of the same cable in adjacent arrangement benchmarks, form a curve connecting the start and end points of the channel in the channel, use this curve as the actual path of the cable, and then determine the cable cross-sectional diameter based on the cable specification model, and generate a columnar entity cable model in the channel based on the cable cross-sectional diameter and the cross-sectional center path.

[0063] Wiring diagram generation unit: completes the cable wiring diagram design based on the generated physical cable model.

[0064] The specific processing process of the wiring diagram generation unit is as follows: select the location of each cable support, cut it perpendicular to the channel, project it to generate a channel cross-section diagram containing the cables, and mark the supports and cables in the channel cross-section to generate a cable wiring diagram for guiding on-site construction.

[0065] The key points of the present invention are:

[0066] 1. Except for two adjacent benchmarks as the channel start and end points, a channel branch must be selected between other adjacent benchmarks. At the same time, an arrangement benchmark must be selected before and after each channel branch to express the changes in cable arrangement;

[0067] 2. The cables should not be arranged in more than three layers, which can not only ensure heat dissipation under the premise of effective use of the bracket, but also reduce the crossing of cables to make the arrangement more neat and beautiful;

[0068] 3. If there is no incoming or outgoing line between two adjacent arrangement benchmarks, the cables of the two are arranged in the same way. If there is a large change in the incoming and outgoing lines, the cross-section can be appropriately increased between the benchmarks when the wiring diagram is generated, so that the arrangement diagram can more clearly describe the on-site cable situation;

[0069] 4. During the cable laying construction process, the actual cable layout should be consistent with the layout plan in the reference point section. Due to the limitation of cable bending radius in other sections, there is a certain difference between the cable laying path and the design.

[0070] The beneficial effects of the present invention are as follows: the incoming and outgoing line positions in the ship's cable channel are selected as wiring references, and a cable arrangement method based on a winding coefficient is used to carry out cable wiring design on the reference, thereby realizing automatic generation of physical cables, reducing the workload of manual cable arrangement and modeling, improving the refinement of ship digital prototype design, and reducing distortion, intersection and winding in the cable arrangement process.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cable arrangement method based on winding coefficient, characterized in that: The method comprises the following steps: S1: Select the cable support position adjacent to the start, end and branch of the cable channel as the cable arrangement reference point; S2: Calculate cable arrangement based on winding coefficient; Step S2 is specifically as follows: S21. Model the cable channel according to the construction standard of the hull structure; S22. When the cables are branched in the channel, they should be arranged according to the principle of short on top and long on bottom; S23, based on the greedy principle, the solution with the smallest winding coefficient δ is selected for each reference point for arrangement; The winding coefficient δ is calculated as follows: Where δ is the twist winding coefficient of the reference point, n is the number of cables arranged at the reference point, and s i is the number of cables on the same layer crossed by the i-th cable at the reference point when it is adjacent to the branch line; S3: Generate a physical cable model according to the cable arrangement; Step S3 is as follows: using a spline to connect the centers of the same cable in adjacent arrangement benchmarks, forming a curve connecting the start and end points of the channel in the channel, using the curve as the actual path of the cable, and then determining the cable cross-sectional diameter according to the cable specification model, and generating a columnar solid cable model in the channel based on the cable cross-sectional diameter and the cross-sectional center path; S4: Complete the cable wiring diagram design based on the generated physical cable model.

2. A cable arrangement method based on winding coefficient according to claim 1, characterized in that: Step S4 is as follows: select the location of each cable support, cut perpendicular to the channel, project and generate a channel cross-section diagram containing the cables, and mark the supports and cables in the channel cross-section to generate a cable wiring diagram for guiding on-site construction.

3. A cable arrangement system based on winding coefficient, characterized in that: include: Arrangement reference selection unit: select the cable support position adjacent to the start, end and branch of the cable channel as the cable arrangement reference point; Cable arrangement calculation unit: calculates cable arrangement based on winding coefficient; The cable arrangement calculation unit has the following specific processing steps: the cable channel is modeled according to the construction standard of the hull structure; when the cables are branched in the channel, they are arranged according to the principle of short up and long down; based on the greedy principle, the solution with the smallest winding coefficient δ is selected for each reference point for arrangement; In the cable arrangement calculation unit, the winding coefficient δ is calculated as follows: Where δ is the twist winding coefficient of the reference point, n is the number of cables arranged at the reference point, and s i is the number of cables on the same layer crossed by the i-th cable at the reference point when it is adjacent to the branch line; Physical cable generation unit: Generates physical cable model according to cable arrangement; The specific processing process of the entity cable generation unit is as follows: the centers of the same cable in adjacent arrangement benchmarks are connected by splines, a curve connecting the start and end points of the channel is formed in the channel, the curve is used as the actual path of the cable, and the cable cross-sectional diameter is determined according to the cable specification model, and a columnar entity cable model is generated in the channel based on the cable cross-sectional diameter and the cross-sectional center path; Wiring diagram generation unit: completes the cable wiring diagram design based on the generated physical cable model.

4. A cable arrangement system based on winding coefficient as claimed in claim 3, characterized in that: The specific processing process of the wiring diagram generation unit is as follows: select the location of each cable support, cut it perpendicular to the channel, project it to generate a channel cross-section diagram containing the cables, and mark the supports and cables in the channel cross-section to generate a cable wiring diagram for guiding on-site construction.

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