A method for converting navigation files from tower pre-arrangement results of line engineering

Abstract

The present invention discloses a method for automatically converting the results of line project tower pre-arrangement into a navigation file, belonging to the field of electric power. The method comprises the following steps: S1, combining the line angle coordinates, solving the Gaussian coordinates of the straight towers in the line pole position results table, and uniformly converting the coordinates into the WGS84 coordinate system; S2, using the WGS84 coordinates, setting the ellipsoid parameters and longitude and latitude through a Gaussian inverse calculation model, and inversely calculating the geodetic coordinates of the tower position; S3, converting the geodetic coordinates into a (.kml) file data format. The results can be directly imported into a mobile phone navigation file and distributed to engineering and technical personnel in need for on-site navigation and positioning. The method of the present invention fundamentally solves the problem of converting line project pre-arrangement results into navigation files. In actual engineering applications, it can improve the efficiency of data processing personnel in the office, enable field personnel to quickly find their destination, reduce the human resource investment in the project office, and improve the overall progress of the project.

Description

Technical Field

[0001] The present invention belongs to the field of electric power, and specifically relates to a method for converting the results of tower pre-arrangement of line projects into navigation files. The method is mainly used in transmission line projects, and can also be applied to all navigation applications of power projects, including station selection (site selection), survey and other projects. Background Art

[0002] Before the final survey and positioning of the line project, the designers pre-arrange the poles according to the surveying and mapping results and provide a tower position coordinate result. However, this coordinate is the cumulative distance coordinate of the tower position and needs to be converted into plane coordinates before it can be connected with the navigation file.

[0003] The traditional operation method is: surveyors draw the path in CAD based on the known corner coordinates, determine the tower position by the intersection of the line cumulative distance coordinates and the corner position, read the plane coordinates point by point, and then use other software to convert them into geodetic coordinates. They then draw it manually in the navigation file and it can only be used in the project after being checked by multiple people.

[0004] Using traditional manual drawing methods to determine the plane coordinates of the tower is time-consuming and prone to errors. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides an automated method to automatically calculate the tower coordinate results into a navigation file through an algorithm, thereby freeing up manpower and improving work efficiency.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A method for converting a navigation file from a tower pre-arrangement result of a line project comprises the following steps:

[0008] S1 combines the line angle coordinates to calculate the Gaussian coordinates of the straight tower in the line pole position results table, and uniformly converts the coordinates into the WGS84 coordinate system;

[0009] S2 uses WGS84 coordinates and Gaussian inverse calculation model to set ellipsoid parameters and longitude and latitude to calculate the geodetic coordinates of the tower location;

[0010] S3 converts geodetic coordinates into the data format of a .kml file. The results can be directly imported into a mobile navigation file and distributed to engineering and technical personnel in need for on-site navigation and positioning.

[0011] A further improvement of the technical solution of the present invention is that step S1 specifically includes the following steps:

[0012] S1.1 Calculate the plane distance between each corner and the previous one based on the known corner coordinates (x, y) of the route, and obtain the mileage of all corners by accumulating them:

[0013]

[0014] In the above formula, Dist(J n , J n+1 ) is J n With J n+1 Plane distance;

[0015] S1.2 Extract the mileage and offset of each tower location from the known tower location results table;

[0016] S1.3 Determine the two adjacent corners before and after the tower location based on the mileage. Calculate the coordinates of the tower location using the coordinates of the two adjacent corners and the distance from the tower location to the two corners:

[0017]

[0018]

[0019] In the above formula, x and y are the national coordinates of the tower location; N is the mileage difference between the tower location extracted in step (2) and the mileage of the previous corner; E is the offset; Dx and Dy are the national coordinates of the previous corner of the tower location; cosα and sinα represent the direction cosine and direction sine; is the azimuth of the two corners, and Δx and Δy are the distance differences between the two corners in the x direction and y direction, respectively.

[0020] S1.4 Obtain the conversion relationship through coordinate joint measurement, and use the Bursa model to convert the calculated tower coordinates into the WGS84 coordinate system.

[0021] The Bursa model is

[0022]

[0023] Where ΔX, ΔY, and ΔZ are three translation parameters, θ x ,θ y ,θ z are three rotation parameters, m is the scale parameter, (X0, Y0, Z0) and (X, Y, Z) are the coordinates of the point before and after the transformation respectively.

[0024] A further improvement of the technical solution of the present invention is that the offset in step S1.2 is 0.

[0025] A further improvement of the technical solution of the present invention is that in step S2, the WGS84 coordinates of the tower position are inversely calculated into geodetic coordinates using the Gaussian coordinate inverse calculation formula, and the Gaussian coordinate inverse calculation formula is:

[0026]

[0027] In the above formula, L and B are geodetic coordinates, and the projection functions f and ψ must meet the following three conditions:

[0028] (1) The x-axis is projected into the central meridian, which is the axis of symmetry of the projection;

[0029] (2) The length projection on the x-axis remains unchanged;

[0030] (3) Conformal projection conditions.

[0031] A further improvement of the technical solution of the present invention is that the specific steps in step S3 are:

[0032] (1) Obtain the storage format of geodetic coordinate data in the (.kml) file;

[0033] (2) According to the storage method of coordinates in the (.kml) file, store the point numbers and coordinates of the tower positions and corners in the specified locations in the file.

[0034] Due to the adoption of the above technical solution, the present invention achieves the following technical effects:

[0035] The method for converting coordinates of pre-arranged poles in line engineering in the present invention fundamentally solves the problem of converting the results of pre-arranged poles in line engineering into navigation files. Through this method, mobile navigation applications can be provided for multiple industries, and it also provides the possibility for non-professionals to create navigation files. In actual engineering applications, it can improve the efficiency of internal data processing personnel, enable field personnel to find their destination quickly, reduce the human resource investment in the project's internal work, and improve the overall progress of the project. The scope of use of this invention is not only the construction drawing stage of line engineering, but all stages; it is not only used for line engineering, but can also be used in power generation, substation (station site, hole position navigation) and other projects. It can be used wherever there are coordinates and navigation is required.

[0036] This system performs simple benefit calculations at the construction drawing stage of line projects: after actual use in the project and comparison with the original manual calculations, it was found that the manual calculation of a 50km line took about 2 hours to process, while the system only took 2 minutes to complete the process, improving the efficiency by 60 times.

[0037] The system has been proven to be simple to operate, easy to use, and accurate in calculation, and can be widely promoted and applied in the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The present invention is a flow chart of a method for converting the results of tower pre-arrangement of a line project into a navigation file. DETAILED DESCRIPTION

[0039] To fully describe the technical content, structural features, objectives and effects of the present invention, the following is a detailed description with reference to the accompanying drawings.

[0040] like Figure 1 As shown, a method for converting the results of tower pre-arrangement of a line project into a navigation file includes the following steps:

[0041] 1. Transformation of line pole position results table to Gaussian coordinates

[0042] (1) Calculate each corner J based on the known line corner coordinates (x, y) n+1 With the previous corner J n The plane distance of , and the mileage of all corners are obtained by accumulation:

[0043]

[0044] In the above formula, Dist(J n , J n+1 ) is J n With J n+1 Plane distance.

[0045] (2) Extract the mileage and offset of each tower position from the known tower position results table, with the offset being 0;

[0046] (3) Determine the two adjacent corners before and after the tower position one by one according to the mileage, and calculate the coordinates of the tower position by the coordinates of the two adjacent corners and the distance from the tower position to the two corners:

[0047]

[0048]

[0049] In the above formula, x and y are the national coordinates of the tower position; N is the mileage difference between the tower position and the previous corner extracted in (2); E is the offset; Dx and Dy are the national coordinates of the previous corner of the tower position; cosα and sinα represent the direction cosine and direction sine; α is the azimuth of the two corners, Δx and Δy are the distance differences in the x and y directions of the two corners respectively;

[0050] (4) The national coordinate system, WGS84, is currently commonly used in engineering projects. It is necessary to obtain the conversion relationship through coordinate joint measurement and convert the tower coordinates calculated by the Bursa model into this coordinate system.

[0051] The Bursa model is

[0052]

[0053] Where ΔX, ΔY, and ΔZ are three translation parameters, θ x ,θ y ,θ zare three rotation parameters, m is the scale parameter, (X0, Y0, Z0) and (X, Y, Z) are the coordinates of the point before and after the transformation respectively.

[0054] 2. Using the national coordinate WGS84 coordinate system, through the following Gaussian inverse projection model, setting the ellipsoid parameters and longitude and latitude, the geodetic coordinates of the tower location can be inversely calculated:

[0055]

[0056] In the above formula, L and B are geodetic coordinates. The projection functions f and ψ must meet the following three conditions:

[0057] (5) The x-axis is projected into the central meridian, which is the axis of symmetry of the projection;

[0058] (6) The length projection on the x-axis remains unchanged;

[0059] (7) Conformal projection conditions.

[0060] 3. Convert the geodetic coordinates into the data format of the (.kml) file. The results can be directly imported into the mobile navigation file and distributed to engineering and technical personnel in need for on-site navigation and positioning.

[0061] (1) Obtain the storage format of geodetic coordinate data in the (.kml) file;

[0062] (2) According to the storage method of coordinates in the (.kml) file, store the point numbers and coordinates of the tower positions and corners in the specified locations in the file.

[0063] Example 1

[0064] The specific method of the present invention is shown below with specific examples.

[0065] (1) The following two data are known: tower position coordinate results table and line corner coordinates;

[0066]

[0067]

[0068]

[0069] (2) According to Table 2, the plane distance between J1 and J0 is calculated by formula (1-1) to be 85, and the plane distance between J1 and J2 is 2730, that is, the mileage of J0 is 0, the mileage of J1 is 85, and the mileage of J2 is 2815;

[0070] (3) Read the point number, mileage and elevation in columns 1, 4 and 8 of the tower coordinate results table;

[0071] (4) Determine the two corner numbers before and after the tower location based on the mileage, and calculate the tower location coordinates one by one using formula (1-2). For example, the cumulative distance of tower location N2 is 421, which means it is located between J1 and J2. In the formula, N is the mileage difference between N2 and J1, which is 336. Dx and Dy are the easting and northing coordinates of J1, and α is the azimuth of the line connecting J1 and J2. Substituting these into formula (1-2) can calculate the tower location coordinates.

[0072]

[0073]

[0074] (5) Obtain the conversion relationship through coordinate joint measurement, and use the Bursa model to convert the corner and straight tower into the WGS84 coordinate system (the corner coordinates in Table 2 of this example are already in the WGS84 coordinate system, so no conversion is required);

[0075] (6) It is known that the central meridian of this data set is 117, and the WGS84 coordinates of the tower position are inversely calculated into geodetic coordinates using the Gaussian coordinate inverse calculation formula (2-1);

[0076]

[0077] (7) According to the general storage method of (.kml) files, the known tower position numbers and coordinates are stored in the corresponding positions in the file to obtain the navigation file of the pre-arranged tower positions.

[0078] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A method for converting the results of tower pre-arrangement in a line project into a navigation file, characterized by: The following steps are involved: S1 generates a tower position result table, combines the line angle coordinates, solves the Gaussian coordinates of the straight towers in the line pole position result table, and uniformly converts the coordinates into the WGS84 coordinate system; step S1 specifically includes the following steps: S1.1 Calculate each corner J based on the known line corner coordinates (x, y) n+1 With the previous corner J n The plane distance of , and the mileage of all corners are obtained by accumulation: In the above formula, Dist(J n , J n+1 ) is J n With J n+1 Plane distance; S1.2 Extract the mileage and offset of each tower location from the known tower location results table; S1.3 Determine the two adjacent corners before and after the tower location based on the mileage. Calculate the coordinates of the tower location using the coordinates of the two adjacent corners and the distance from the tower location to the two corners: In the above formula, x and y are the national coordinates of the tower location; N is the mileage difference between the tower location extracted in step S1.2 and the previous corner; E is the offset; Dx and Dy are the national coordinates of the previous corner of the tower location; cosα and sinα represent the direction cosine and direction sine respectively; α is the azimuth of the two corners, and Δx and Δy are the distance differences between the two corners in the x and y directions respectively. S1.4 Obtain the conversion relationship through coordinate joint measurement, and use the Bursa model to convert the calculated tower coordinates into the WGS84 coordinate system; S2 uses WGS84 coordinates and Gaussian inverse calculation model to set ellipsoid parameters and longitude and latitude to calculate the geodetic coordinates of the tower location; S3 converts geodetic coordinates into the data format of a .kml file, imports the results directly into a mobile navigation file, and distributes them to engineering and technical personnel in need to implement navigation and positioning on site.

2. The method for converting the results of tower pre-arrangement of a line project into a navigation file according to claim 1, characterized in that: The Bursa model is Where ΔX, ΔY, and ΔZ are three translation parameters, θ x ,θ y ,θ z are three rotation parameters, m is the scale parameter, (X0, Y0, Z0) and (X, Y, Z) are the coordinates of the point before and after the transformation respectively.

3. The method for converting the results of tower pre-arrangement of a line project into a navigation file according to claim 1, characterized in that: The offset in step S1.2 is 0.

4. The method for converting the results of tower pre-arrangement of a line project into a navigation file according to claim 1, characterized in that: In step S2, the WGS84 coordinates of the tower position are inversely calculated into geodetic coordinates using the Gaussian coordinate inverse calculation formula. The Gaussian coordinate inverse calculation formula is: In the above formula, L and B are geodetic coordinates, and the projection functions f and ψ must meet the following three conditions: (1) The x-axis is projected into the central meridian, which is the axis of symmetry of the projection; (2) The length projection on the x-axis remains unchanged; (3) Conformal projection conditions.

5. The method for converting the results of tower pre-arrangement of a line project into a navigation file according to claim 1, characterized in that: The specific steps in step S3 are: S3.1 obtain the storage format of geodetic coordinate data in the .kml file; S3.2 stores the point numbers and coordinates of the tower positions and corners in the specified locations in the file according to the storage method of the coordinates in the .kml file.

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