1. A method for constructing a power transmission line freight cableway based on terrain self-adaptation is characterized by comprising the following steps:

generating a two-dimensional topographic curve by combining three-dimensional geographic information data interpolation based on the position information of the feeding point and the position information of the discharging point;

establishing a bearing cable curve on the two-dimensional terrain curve based on the positions of the feeding points and the positions of the discharging points;

based on the interference condition of the bearing cable curve and the two-dimensional topographic curve, moving the bearing cable curve upwards and downwards to determine the position of the middle bracket;

and determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support.

2. The method for constructing a power transmission line freight ropeway according to claim 1, wherein the determining the position of the intermediate support by moving the carrier cable curve upwards and downwards based on the interference condition of the carrier cable curve and the two-dimensional terrain curve comprises:

a1: constructing a bearing cable curve by taking the feeding point and the discharging point as a starting point and an end point respectively;

a2: judging whether the bearing cable curve interferes with the two-dimensional topographic curve, if so, translating the starting point and the end point upwards until the bearing cable curve and the two-dimensional topographic curve only have a unique interference point, arranging a middle bracket at the unique interference point, and executing A3, otherwise, executing A6;

a3: simultaneously moving a starting point and an end point downwards based on the set displacement, and judging whether the starting point and the end point return to a feeding point and a discharging point;

a4: when returning to the feeding point and the blanking point, executing A6, otherwise executing A5;

a5: two bearing cable curves are respectively established between the starting point and the adjacent middle bracket of the starting point and between the end point and the adjacent middle bracket of the end point; respectively determining whether interference occurs to the two-dimensional terrain curve or not for each carrying cable curve, if interference occurs, setting a middle bracket at the maximum interference point, and executing A3, otherwise executing A6;

a6: and modifying the intermediate support according to a cableway carrying cable curve formed among the starting point, the terminal point and all the intermediate supports and based on a set support interval threshold and an intermediate support selection principle.

3. The method for constructing a freight cableway for an electric transmission line according to claim 2, wherein the step of modifying the intermediate frames based on the set frame interval threshold and the intermediate frame selection principle for the cableway carrier cable curve formed between the starting point, the ending point and all the intermediate frames comprises the steps of:

judging whether the distance of a load-bearing cable curve between two adjacent intermediate supports of the freight cableway of the power transmission line is greater than a threshold value or not, if so, finding out a maximum interference point of the load-bearing cable curve and a two-dimensional topographic curve, and additionally arranging a new intermediate support at the maximum interference point;

and screening redundant intermediate supports and deleting redundant supports based on the freight cableway intermediate support selection principle.

4. The method for constructing a freight cableway for an electric transmission line according to claim 3, wherein the step of screening redundant intermediate supports and deleting redundant supports based on the selection principle of the intermediate supports of the freight cableway comprises the following steps:

and sequentially finding out the bracket behind each bracket, which is not more than a set threshold value away from the bracket, is farthest away from the bracket and does not interfere with the terrain with the bearing cable curve between the brackets from the starting point of the cableway, and deleting all redundant brackets between the two brackets.

5. The method for constructing the freight cableway for the electric transmission line according to claim 1, wherein the step of generating the two-dimensional topographic curve by combining the position information of the feeding point and the position information of the discharging point with the three-dimensional geographic information data through interpolation comprises the following steps:

linearly connecting the feeding point and the blanking point in a horizontal plane to generate a line segment;

dividing the generated line segment into a plurality of line segments according to a set section terrain sampling interval to obtain coordinates of a division point;

generating height data of each segmentation point based on the three-dimensional geographic information data and coordinate interpolation at the segmentation points;

and taking the projection of a line segment generated by the feeding point and the blanking point on a horizontal plane as a horizontal axis, taking a plane vertical to the projection as a vertical axis, and generating a two-dimensional topographic curve based on the height data of the dividing points.

6. The method for constructing a power transmission line freight cableway according to claim 2, characterized in that the mathematical model of the load-bearing cable curve of the cableway is as follows:

in the formula: z is a radical of₀Representing the curve of the carrying cableThe height value of the point above relative to the starting point of the curve; x is the number of₀Representing the horizontal distance of a point on the load bearing cable curve from the starting point; l represents the horizontal distance between the end point of the load bearing cable curve and the starting point; c represents the height value of the terminal point of the load bearing cable curve relative to the starting point; f represents the mid-span sag of the load bearing cable curve.

7. The method for constructing the power transmission line freight cableway according to claim 1, wherein the step of determining the power transmission line freight cableway based on the loading point, the unloading point and the intermediate support further comprises the following steps:

and judging the rationality of the power transmission line freight cableway based on the support setting standard.

8. The method for constructing a power transmission line freight ropeway according to claim 7, wherein the rationality judgment includes:

and when the power transmission line freight cableway meets the support setting standard, the power transmission line freight cableway is reasonably set, otherwise, the setting is unreasonable.

9. The method of constructing a power transmission line freight ropeway of claim 8, wherein the rack set-up criteria include: the total length of the cableway is not less than a set value, the span of the adjacent supports is greater than the set value, the number of the middle supports is not greater than the set value, and the chord inclination angle is less than the set value.

10. A system for constructing a power transmission line freight cableway based on terrain self-adaptation is characterized by comprising the following steps: the device comprises a curve generation module, a curve construction module, a support setting module and a cableway generation module;

the curve generation module is used for generating a two-dimensional topographic curve based on the feeding point position information and the discharging point position information by combining three-dimensional geographic information data interpolation;

the curve building module is used for building a bearing cable curve on the two-dimensional topographic curve based on the positions of the feeding points and the positions of the discharging points;

the bracket setting module is used for moving the bearing cable curve upwards and downwards to determine the position of the middle bracket based on the interference condition of the bearing cable curve and the two-dimensional topographic curve;

and the cableway generating module is used for determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support.

Background

With the rapid development of power grid construction, influenced by line profile restriction and environmental protection problems, the path of the ultra-high voltage transmission line passes through high mountains and high mountains more and more frequently, the transportation of materials such as large tower materials, wires and construction equipment for the ultra-high voltage transmission line becomes a difficult problem to be solved urgently, and the traditional manpower and animal-powered material transportation mode cannot meet the construction requirement of the ultra-high voltage transmission line. The policy of environmental protection is increasingly strict, and construction transportation roads are difficult to construct by cutting down a large number of forest trees. The freight ropeway special for overhead transmission line construction gives consideration to safety, efficiency, economic benefits and environmental protection, and is an ideal material transportation mode.

The traditional cableway path planning work mainly comprises line selection on a graph, data collection, site initial survey, planning scheme, final survey line selection and path examination. Each work depends on the experience of technicians to a great extent, and needs to go to the site for surveying many times, which consumes a great deal of time and manpower and has the defects of long planning period, high labor intensity and the like. When the cableway path is planned, the influence of geographic information on the scientificity and economy of material transportation needs to be fully considered, the path planning relates to the space multi-objective decision problem in various aspects such as engineering, environment and economy, and construction technicians are difficult to comprehensively master and implement. With the development of a Geographic Information System (GIS for short), the strong Geographic Information analysis and processing capabilities of the System are widely and successfully applied to the fields of urban and rural planning, urban pipe networks, traffic navigation and the like, and in recent years, the System is also applied to power transmission line path planning, so that the efficiency of power transmission line path planning is greatly improved. Therefore, the automatic planning of the power transmission line freight cableway path based on the GIS is a hot research problem at present, but due to the lack of an efficient automatic setting method of the power transmission line freight cableway support, the automation of the cableway path planning based on high-precision geographic information data lacks enough theoretical basis and technical support, the GIS is rarely used in the fields of cableway path automatic planning and the like, and the technical effect of the GIS cannot be fully played.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention provides a method for constructing a power transmission line freight cableway based on terrain adaptation, comprising:

generating a two-dimensional topographic curve by combining three-dimensional geographic information data interpolation based on the position information of the feeding point and the position information of the discharging point;

establishing a bearing cable curve on the two-dimensional terrain curve based on the positions of the feeding points and the positions of the discharging points;

based on the interference condition of the bearing cable curve and the two-dimensional topographic curve, moving the bearing cable curve upwards and downwards to determine the position of the middle bracket;

and determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support.

Preferably, the determining the position of the intermediate support by moving the carrier cable curve upwards and downwards based on the interference condition of the carrier cable curve and the two-dimensional topographic curve comprises:

a1: constructing a bearing cable curve by taking the feeding point and the discharging point as a starting point and an end point respectively;

a2: judging whether the bearing cable curve interferes with the two-dimensional topographic curve, if so, translating the starting point and the end point upwards until the bearing cable curve and the two-dimensional topographic curve only have a unique interference point, arranging a middle bracket at the unique interference point, and executing A3, otherwise, executing A6;

a3: simultaneously moving a starting point and an end point downwards based on the set displacement, and judging whether the starting point and the end point return to a feeding point and a discharging point;

a4: when returning to the feeding point and the blanking point, executing A6, otherwise executing A5;

a5: two bearing cable curves are respectively established between the starting point and the adjacent middle bracket of the starting point and between the end point and the adjacent middle bracket of the end point; respectively determining whether interference occurs to the two-dimensional terrain curve or not for each carrying cable curve, if interference occurs, setting a middle bracket at the maximum interference point, and executing A3, otherwise executing A6;

a6: and modifying the intermediate support according to a cableway carrying cable curve formed among the starting point, the terminal point and all the intermediate supports and based on a set support interval threshold and an intermediate support selection principle.

Preferably, the modifying the intermediate support according to the curve of the cableway carrying cable formed by the starting point, the ending point and all the intermediate supports based on the set support interval threshold and the intermediate support selection principle comprises:

judging whether the distance of a load-bearing cable curve between two adjacent intermediate supports of the freight cableway of the power transmission line is greater than a threshold value or not, if so, finding out a maximum interference point of the load-bearing cable curve and a two-dimensional topographic curve, and additionally arranging a new intermediate support at the maximum interference point;

and screening redundant intermediate supports and deleting redundant supports based on the freight cableway intermediate support selection principle.

Preferably, the screening of redundant intermediate frames and the deleting of redundant intermediate frames based on the freight cableway intermediate frame selection principle includes:

and sequentially finding out the bracket behind each bracket, which is not more than a set threshold value away from the bracket, is farthest away from the bracket and does not interfere with the terrain with the bearing cable curve between the brackets from the starting point of the cableway, and deleting all redundant brackets between the two brackets.

Preferably, the generating of the two-dimensional topographic curve by combining the position information of the feeding point and the position information of the discharging point with the interpolation of the three-dimensional geographic information data includes:

linearly connecting the feeding point and the blanking point in a horizontal plane to generate a line segment;

dividing the generated line segment into a plurality of line segments according to a set section terrain sampling interval to obtain coordinates of a division point;

generating height data of each segmentation point based on the three-dimensional geographic information data and coordinate interpolation at the segmentation points;

and taking the projection of a line segment generated by the feeding point and the blanking point on a horizontal plane as a horizontal axis, taking a plane vertical to the projection as a vertical axis, and generating a two-dimensional topographic curve based on the height data of the dividing points.

Preferably, the mathematical model of the cableway carrying cable curve is as follows:

in the formula: z is a radical of₀Representing the height value of a point on the load bearing cable curve relative to the starting point of the curve; x is the number of₀Representing the horizontal distance of a point on the load bearing cable curve from the starting point; l represents the horizontal distance between the end point of the load bearing cable curve and the starting point; c represents the height value of the terminal point of the load bearing cable curve relative to the starting point; f represents the mid-span sag of the load bearing cable curve.

Preferably, after determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support, the method further comprises the following steps:

and judging the rationality of the power transmission line freight cableway based on the support setting standard.

Preferably, the rationality judgment includes:

and when the power transmission line freight cableway meets the support setting standard, the power transmission line freight cableway is reasonably set, otherwise, the setting is unreasonable.

Preferably, the rack setting criteria include: the total length of the cableway is not less than a set value, the span of the adjacent supports is greater than the set value, the number of the middle supports is not greater than the set value, and the chord inclination angle is less than the set value.

Based on the same invention concept, the invention provides a system for constructing a power transmission line freight cableway based on terrain self-adaptation, which is characterized by comprising the following steps: the device comprises a curve generation module, a curve construction module, a support setting module and a cableway generation module;

the curve generation module is used for generating a two-dimensional topographic curve based on the feeding point position information and the discharging point position information by combining three-dimensional geographic information data interpolation;

the curve building module is used for building a bearing cable curve on the two-dimensional topographic curve based on the positions of the feeding points and the positions of the discharging points;

the bracket setting module is used for moving the bearing cable curve upwards and downwards to determine the position of the middle bracket based on the interference condition of the bearing cable curve and the two-dimensional topographic curve;

and the cableway generating module is used for determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support.

Compared with the prior art, the invention has the beneficial effects that:

a method for constructing a power transmission line freight cableway based on terrain self-adaptation comprises the following steps: generating a two-dimensional topographic curve by combining three-dimensional geographic information data interpolation based on the position information of the feeding point and the position information of the discharging point; establishing a bearing cable curve on the two-dimensional terrain curve based on the positions of the feeding points and the positions of the discharging points; based on the interference condition of the bearing cable curve and the two-dimensional topographic curve, moving the bearing cable curve upwards and downwards to determine the position of the middle bracket; and determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support. The invention can automatically and comprehensively consider the influence of the geographic information on material transportation according to the input geographic information data, the position of the feeding point and the position of the discharging point, realizes the automatic setting of the freight cableway bracket, greatly reduces the time and labor cost of the freight cableway path planning work, and provides theoretical basis and technical support for the automation of the cableway path planning based on high-precision data.

Drawings

FIG. 1 is a flow chart of a method for constructing a power transmission line freight cableway based on terrain adaptation according to the present invention;

FIG. 2 is a flowchart of a specific algorithm of the method for constructing a power transmission line freight cableway based on terrain adaptation according to the present invention;

FIG. 3 is a schematic diagram of the geographic information around the loading and unloading points of the present invention;

FIG. 4 is a principal flow chart of the present invention for generating a two-dimensional terrain profile using interpolation;

FIG. 5 is a schematic diagram of the automatic selection of the intermediate support of the freight cableway based on terrain adaptation according to the present invention;

FIG. 6 is a flowchart of an algorithm for automatically selecting a middle support of a freight cableway based on terrain adaptation according to the present invention;

fig. 7 is a route information diagram of the power transmission line freight cableway of the invention.

Detailed Description

For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.

Example 1:

a method for constructing a power transmission line freight cableway based on terrain adaptation, as shown in fig. 1, includes:

step 1: generating a two-dimensional topographic curve by combining three-dimensional geographic information data interpolation based on the position information of the feeding point and the position information of the discharging point;

step 2: establishing a bearing cable curve on the two-dimensional topographic curve vertically above the feeding point position and the discharging point position;

and step 3: based on the interference condition of the bearing cable curve and the two-dimensional topographic curve, moving the bearing cable curve upwards and downwards to determine the position of the middle bracket;

and 4, step 4: and determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support.

The specific algorithm flow of the method for constructing the power transmission line freight cableway based on terrain self-adaptation is shown in figure 2:

and (3) generating a two-dimensional terrain curve of the cableway path by interpolation: and generating a two-dimensional topographic curve of the cableway path by adopting interpolation modes such as linear interpolation, cubic convolution interpolation or cubic spline curve interpolation and the like according to the loading/unloading point position and the three-dimensional geographic information of the cableway path.

Automatically setting a middle bracket of the cableway: according to a two-dimensional terrain curve of a cableway path and a selection principle of an intermediate support (the curve of a cableway bearing cable must be higher than the ground, and the distance between adjacent supports is not more than 400m), the intermediate support of the cableway is set based on a terrain self-adaptive method.

Judging the rationality of the cableway: judging whether the cableways all meet the following conditions: the total length is less than 3000m, the span of the adjacent brackets is more than 20m, the number of the middle brackets is not more than 7, the chord dip angle is less than 45 degrees, and the like. If yes, outputting cableway information; otherwise, outputting: "not suitable for building a cableway".

Wherein, step 1 specifically includes: according to the method, the cableway middle support can be automatically set on the basis of generating a two-dimensional topographic curve through interpolation according to geographic information data, the loading point position and the unloading point position shown in the figure 3, a reasonable cableway capable of transporting materials from the loading point to the unloading point is automatically planned, and a foundation is laid for automatically planning the path of a freight cableway.

The input geographic information shown in fig. 3 mainly includes the position of the feeding point, the position of the discharging point, and three-dimensional geographic information data of their peripheries. Wherein the positions of the feeding point and the discharging point input in the program are coordinates (x, y direction) of the feeding point and the discharging point in the x, y direction_s,y_s) And (x)_x,y_x) (subscript s represents a feed point and subscript x represents a discharge point); three-dimensional geographic information data [ H ] around feeding/discharging point]_M×NIs a two-dimensional array whose elements H_iAnd j represents a road peripheral coordinate of (x)_i,y_j) Terrain height at location (i ═ 1,2, …, M; j ═ 1,2, …, N; m and N areThe number of terrain data sample points in the x and y directions, respectively). And (3) generating a two-dimensional terrain curve of the cableway path by interpolation: and generating a two-dimensional topographic curve of the cableway path by adopting interpolation modes such as linear interpolation, cubic convolution interpolation or cubic spline curve interpolation and the like according to the loading/unloading point position and the three-dimensional geographic information of the cableway path.

The main flow of the present invention for generating a two-dimensional topographic curve using interpolation is shown in fig. 4:

(1) generating a line segment: and linearly connecting the upper blanking point and the lower blanking point in a horizontal plane to generate a line segment.

(2) Line segment segmentation: the generated line segment is divided at a certain interval (two-dimensional terrain sampling interval deltas) to obtain the x and y coordinates of the divided point.

(3) Calculating the height value of the segmentation points: and generating height data of each segmentation point by interpolation according to the three-dimensional terrain data and the x and y coordinates of the segmentation points, wherein the selected interpolation method can be linear interpolation, cubic convolution interpolation, cubic spline curve interpolation and the like.

The step 2 and the step 3 specifically comprise the following steps:

automatically setting a middle bracket of the cableway: according to a two-dimensional terrain curve of a cableway path and a selection principle of an intermediate support (the curve of a cableway bearing cable must be higher than the ground, and the distance between adjacent supports is not more than 400m), the intermediate support of the cableway is set based on a terrain self-adaptive method.

Specifically, after a two-dimensional terrain profile of a cableway path is obtained, an intermediate support of the cableway needs to be arranged according to terrain information and a cargo transporting cableway intermediate support selection principle (a cableway carrying cable curve needs to be higher than the ground, and the distance between adjacent supports is not more than 400 m). The invention provides a method for constructing a power transmission line freight cableway based on terrain self-adaptation, which comprises the steps of establishing a single-span cableway bearing cable curve (the starting point and the end point of the bearing cable curve are respectively positioned at a feeding point and a discharging point) above a target two-dimensional terrain, and then controlling the starting point and the end point of the cableway bearing cable curve to gradually fall close to the feeding point and the discharging point; during the falling process, the bearing cable curve interferes with the terrain (when the bearing cable curve has an intersection point with the terrain profile, the bearing cable curve is considered to interfere with the terrain), when interference occurs, an intermediate bracket is added to the cableway at the maximum interference position (the maximum interference position is a position where the maximum height difference is generated at the terrain segmentation point by the two-dimensional terrain and the bearing cable curve), the interference is prevented from occurring, and the bearing cable curve adapts to the terrain until the starting point and the end point of the bearing cable curve coincide with the feeding point and the discharging point respectively. The curve of the single-span cableway carrying cable is set to be a parabola, and the expression of the curve is shown in formula (1).

In the formula: z is a radical of₀Representing the height value of a point on the load bearing cable curve relative to the starting point of the curve; x is the number of₀Representing the horizontal distance of a point on the load bearing cable curve from the starting point; l represents the horizontal distance between the end point of the load bearing cable curve and the starting point; c represents the height value of the terminal point of the load bearing cable curve relative to the starting point; f represents the midspan sag of the load bearing cable curve, and the value range of f is 0.05 to 0.08.

The principle of this method can be further explained by means of FIG. 5: firstly, setting a point a and a point d at a feeding point and a blanking point respectively, establishing a cableway bearing cable curve between the two points, and judging whether the bearing cable curve interferes with the terrain; if the interference is avoided, only one single-span cableway needs to be established between the feeding point and the discharging point; if interfering, translate points a and d upward simultaneously until there is only one point of interference between the load bearing cable curve and the terrain. Then, the intermediate support b and the intermediate support c are arranged at the interference point, and the bearing cable curves are respectively established between the points a and b and the points c and d. And meanwhile, moving the point a and the point d downwards for a certain distance, judging whether the bearing cable curve between the point a and the point b and the bearing cable curve between the point c and the point d interfere with the terrain, and respectively finding the maximum interference positions 1 and 2. On the basis, the intermediate supports b and c are respectively moved to the positions of two maximum interference points, the steps of establishing a new bearing cable curve between the point a and the point b and the point c and the point d, moving the point a and the point d downwards, searching the maximum interference points and the like are repeated until the point a and the point d return to the feeding point and the discharging point, and the positions of all the intermediate supports can be obtained. The intermediate support generated by the method does not consider the problem of overlarge support distance and the problem of possible interference points between the maximum interference point and the cableway between the existing supports and the terrain, so that the cableway between all the adjacent supports needs to be further optimized.

The reasonability judgment is also needed to be carried out on the automatically generated cableway to judge whether the cableway meets the following conditions: the total length is less than 3000m, the span of the adjacent brackets is more than 20m, the number of the middle brackets is not more than 7, the chord dip angle is less than 45 degrees, and the like. If yes, outputting cableway information; otherwise, outputting: "not suitable for building a cableway".

Inputting geographic information data, a feeding point position and a discharging point position shown in fig. 3, running a program, and automatically outputting cableway path information which can transport materials from the feeding point to the discharging point and is shown in fig. 7.

Example 2:

in the method for constructing the power transmission line freight cableway based on terrain self-adaptation, the support setting can be realized according to the steps shown in figure 6:

(1) initializing a load bearing cable curve: assigning the position coordinate of the feeding point to a point a, and assigning the position coordinate of the discharging point to a point d; then establishing a bearing cable curve between the point a and the point d and judging whether the curve interferes with the terrain; if the interference occurs, synchronously translating the point a and the point d upwards until the bearing cable curve has only one interference point with the terrain, adding the interference points into a middle bracket, and assigning coordinates of the positions of the interference points to the point b and the point c respectively; if not, go to step (3).

(2) Moving down points a and d, finding a middle bracket: and simultaneously, the point a and the point d are translated downwards by the height displacement increment delta h, bearing cable curves e and f are established between the point a and the point b and between the point c and the point d, and whether the bearing cable curves e and f interfere with the terrain is judged respectively. And if the interference is caused, setting the maximum interference point as the middle bracket, and respectively moving the point b and the point c to the maximum interference point position of the corresponding bearing cable curve. Then, it is determined whether the points a and d return to the up/down feeding point. If the material loading and unloading point is returned, the next step is carried out, otherwise, the step (2) is executed in a circulating way.

(3) The feeding/discharging points are set as supports: and respectively increasing feeding/discharging points as a starting point/end point bracket.

(4) Optimizing adjacent supports with overlarge spans: and adding new supports among all adjacent supports with the distance larger than 400m, then finding out the maximum interference point of the bearing cable curve and the terrain curve among all adjacent supports, and adding new supports. And (4) continuously and circularly adding the supports until all spans of the cableway are not more than 400m and no interference point exists between all bearing cable curves and the terrain.

(5) And (4) deleting redundant brackets: and sequentially finding out the bracket behind each bracket, which is not more than 400m away from the bracket, is farthest away from the bracket and does not interfere with the terrain with the curve of the bearing cable between the brackets from the starting point of the cableway, and deleting all redundant brackets between the two brackets.

Example 3:

based on the same invention concept, the invention also provides a system for constructing the freight cableway of the power transmission line based on terrain self-adaptation, which comprises the following steps: the device comprises a curve generation module, a curve construction module, a support setting module and a cableway generation module;

the curve generation module is used for generating a two-dimensional topographic curve based on the feeding point position information and the discharging point position information by combining three-dimensional geographic information data interpolation;

the curve building module is used for building a bearing cable curve on the two-dimensional topographic curve based on the positions of the feeding points and the positions of the discharging points;

the bracket setting module is used for moving the bearing cable curve upwards and downwards to determine the position of the middle bracket based on the interference condition of the bearing cable curve and the two-dimensional topographic curve;

and the cableway generating module is used for determining the power transmission line freight cableway based on the feeding point, the discharging point and the middle support.

Preferably, the curve generating module includes: the section determining submodule, the sampling submodule, the height positioning submodule and the curve generating submodule are arranged on the base;

the section determining submodule is used for linearly connecting the feeding point and the discharging point in a horizontal plane to generate a line segment;

the sampling submodule is used for dividing the generated line segment into a plurality of line segments according to a set section terrain sampling interval to obtain coordinates of a division point;

the height positioning submodule generates height data of each segmentation point based on the three-dimensional geographic information data and coordinate interpolation of the segmentation points;

and the curve generation submodule generates a two-dimensional topographic curve based on the height data of the segmentation points by taking the projection of a line segment generated by the feeding points and the blanking points on the horizontal plane as a horizontal axis and the direction vertical to the projection as a vertical axis.

It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.