CN111831711A - Laser coordinate-based power transmission line common-tower and line cross-crossing statistical method - Google Patents
Laser coordinate-based power transmission line common-tower and line cross-crossing statistical method Download PDFInfo
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Abstract
The invention provides a laser coordinate-based power transmission line same-tower and line crossing statistical method, which changes the traditional statistical method of the coordinate, line path, same-tower erection, phase sequence diagram and line crossing situation of a power transmission line tower, and a robot replaces a human to automatically complete the operation, so that the basic line account data and the operation and inspection data of the line are more accurate, and the statistics is more efficient.
Description
Technical Field
The invention relates to the field of operation and inspection of high-voltage transmission lines, in particular to a laser coordinate-based statistical method for cross spanning between same tower and line of a transmission line.
Background
The high-voltage transmission line body and the accessory facilities have complex structures, wide line crossing range and complex and severe operation environment, buildings, structures, rivers, trees and hanging objects in a line protection area are complex, line operation and maintenance operation needs to master the accurate tower coordinates, line paths and the line crossing situation of the transmission line in detail so as to carry out differential operation and maintenance on important special sections (important crossing sections), and the transmission line can have the situations of line fault tripping, part damage and the like in the operation process, so that a line operation management unit needs to master the information of the tower coordinates, the same tower erection situation, the line phase sequence and the like of the transmission line in detail and accurately so as to complete fault positioning, overhaul or rush repair quickly and improve the equipment health degree.
The Chinese patent 201711311324.7 discloses a laser point cloud classification method for cross-over analysis of power transmission lines, which utilizes a laser point cloud component power grid and a ground object model, and then judges whether a cross-over part of the line is in a dangerous distance; but does not disclose an algorithm for counting cross spans between the same tower and the same line of the transmission line.
At present, each transmission line operation and maintenance management unit mainly collects the coordinates of a tower through a mobile terminal (such as a PDA), collects visible light photos of the transmission line tower and parts through a telescope and a camera, and then manually checks the photos to distinguish the line name, the same-tower erection condition, the phase sequence condition and the line crossing condition. The manual counting and confirming mode is time-consuming, labor-consuming, low in efficiency and poor in accuracy.
Disclosure of Invention
The invention aims to overcome at least one defect in the prior art, and provides a laser coordinate-based power transmission line same-tower and line-line cross-span statistical method, so that the problems of time and labor waste of manual statistics are solved, and the effect of improving the working efficiency is achieved.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a laser coordinate-based power transmission line same-tower and line crossing statistical method comprises the following steps:
s1: extracting coordinates of the power transmission line tower; extracting coordinates of a tower of the power transmission line based on the laser point cloud of the power transmission line, and forming a tower coordinate database;
s2: selecting a calculation area; selecting tower coordinates of a target line from the database, and determining a calculation area according to the tower coordinates of the target line;
s3: determining the same-tower erection condition of the target line according to the distance relationship between each tower coordinate of the target line and each tower coordinate of other lines in the calculation area;
s4: sequentially judging whether the number of towers of other lines except the target line in the calculation area is greater than 1, and if the number of towers of the other lines in the calculation area is greater than 1, executing the step S5;
s5: and performing cross-over calculation on the target line and the other lines.
Further, the step S5 is to perform cross-over calculation by using a cross-product formula, specifically:
selecting two towers N and N +1 in the target line, selecting two towers N and N +1 of the other line, and enabling each selected tower to correspond to the coordinate of the selected tower in the database;
primary judgment: forming vectors NN +1, NN and NN +1, and performing cross multiplication operation:
if (NN +1) × NN <0 and (NN +1) × (NN +1) >0, then poles n and n +1 are on both sides of vector NN + 1;
and (4) secondary judgment: forming vectors nN +1, nN and nN +1, and performing cross multiplication operation:
if (nN +1) × (nN +1) <0 and (nN +1) × nN >0, then towers N and N +1 are flanked by vector nN + 1.
And if the primary judgment and the secondary judgment are simultaneously met, the tower N, N +1 crosses over with n and n + 1.
Further, before extracting the coordinates of the tower of the power transmission line in step S1, tower numbering is performed first.
Further, the calculation area is a rectangle, and the rectangle surrounds the coordinates of each tower of the target line.
Further, the distance between the side of the rectangle in the east-west direction and the nearest tower coordinate in the target line is 0.02 latitude value;
and the distance between the side of the rectangle in the north-south direction and the nearest tower coordinate in the target line is 0.02 longitude value.
Further, in step S3, if the distance between the target tower coordinate and the other tower coordinate is less than 5 meters, it is determined that the tower is erected on the same tower.
Further, in step S4, if the number of towers in the calculation area of the other line is less than or equal to 1, the other line does not cross the target line.
And further, sequentially selecting coordinates of two adjacent towers of the target line to perform cross-over calculation, and finally obtaining the cross-over condition of the target line.
And further, sequentially selecting each line as the target line, and finally obtaining the cross spanning condition of the same tower and the line of the whole power transmission line.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention changes the traditional statistical method of the coordinates, the line paths, the same-tower erection, the phase sequence diagram and the line crossing situation of the transmission line tower, replaces a robot to automatically complete the operation, and ensures that the basic ledger data and the operation and inspection data of the line are more accurate and the statistics is more efficient.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, a statistical method for intersection and crossing of transmission lines with towers and lines based on laser coordinates includes the following steps:
s1: extracting coordinates of the power transmission line tower; extracting coordinates of a tower of the power transmission line based on the laser point cloud of the power transmission line, and forming a tower coordinate database;
s2: selecting a calculation area; selecting tower coordinates of a target line from the database, and determining a calculation area according to the tower coordinates of the target line;
s3: determining the same-tower erection condition of the target line according to the distance relationship between each tower coordinate of the target line and each tower coordinate of other lines in the calculation area;
s4: sequentially judging whether the number of towers of other lines except the target line in the calculation area is greater than 1, and if the number of towers of the other lines in the calculation area is greater than 1, executing the step S5;
s5: and performing cross-over calculation on the target line and the other lines.
Step S5 is to perform cross-over calculation using a cross-product formula, specifically:
selecting two towers N and N +1 in the target line, selecting two towers N and N +1 of the other line, and enabling each selected tower to correspond to the coordinate of the selected tower in the database;
primary judgment: forming vectors NN +1, NN and NN +1, and performing cross multiplication operation:
if (NN +1) × NN <0 and (NN +1) × (NN +1) >0, then poles n and n +1 are on both sides of vector NN + 1;
and (4) secondary judgment: forming vectors nN +1, nN and nN +1, and performing cross multiplication operation:
if (nN +1) × (nN +1) <0 and (nN +1) × nN >0, then towers N and N +1 are flanked by vector nN + 1.
And if the primary judgment and the secondary judgment are simultaneously met, the tower N, N +1 crosses over with n and n + 1.
Before extracting the coordinates of the power transmission line tower in the step S1, tower labels are first performed.
The calculation area is a rectangle which surrounds the coordinates of each tower of the target line.
The distance between the side of the rectangle in the east-west direction and the nearest tower coordinate in the target line is 0.02 latitude value;
and the distance between the side of the rectangle in the north-south direction and the nearest tower coordinate in the target line is 0.02 longitude value.
In step S3, if the distance between the target line tower coordinate and the other line tower coordinate is less than 5 meters, it is determined that the same tower is erected.
In step S4, if the number of towers in the calculation area of the other line is less than or equal to 1, the other line does not cross the target line.
And sequentially selecting coordinates of two adjacent towers of the target line to perform cross spanning calculation, and finally obtaining the cross spanning condition of the target line.
And sequentially selecting each line as the target line, and finally obtaining the cross spanning condition of the same tower and the line of the whole power transmission line.
The same or similar reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The laser coordinate-based power transmission line same-tower and line crossing statistical method is characterized by comprising the following steps of:
s1: extracting coordinates of the power transmission line tower: extracting coordinates of a tower of the power transmission line based on the laser point cloud of the power transmission line, and forming a tower coordinate database;
s2: selecting a calculation area: selecting tower coordinates of a target line from the database, and determining a calculation area according to the tower coordinates of the target line;
s3: determining the same-tower erection condition of the target line according to the distance relationship between each tower coordinate of the target line and each tower coordinate of other lines in the calculation area;
s4: sequentially judging whether the number of towers of other lines except the target line in the calculation area is greater than 1, and if the number of towers of the other lines in the calculation area is greater than 1, executing the step S5;
s5: and performing cross-over calculation on the target line and the other lines.
2. The statistical method for crossing between same tower and line of electric transmission line according to claim 1, wherein the step S5 is to perform crossing calculation by using a cross product formula, specifically:
selecting two towers N and N +1 in the target line, selecting two towers N and N +1 of the other line, and enabling each selected tower to correspond to the coordinate of the selected tower in the database;
primary judgment: forming vectors NN +1, NN and NN +1, and performing cross multiplication operation:
if (NN +1) × NN <0 and (NN +1) × (NN +1) >0, then poles n and n +1 are on both sides of vector NN + 1;
and (4) secondary judgment: forming vectors nN +1, nN and nN +1, and performing cross multiplication operation:
if (nN +1) × (nN +1) <0 and (nN +1) × nN >0, then towers N and N +1 are flanked by vector nN + 1.
And if the primary judgment and the secondary judgment are simultaneously met, the tower N, N +1 crosses over with n and n + 1.
3. The statistical method for crossing between power transmission line towers and lines according to claim 2, wherein tower labels are carried out before extracting coordinates of the power transmission line towers in the step S1.
4. The statistical method for intersection span between same tower and line of transmission line according to claim 3, wherein the calculation area is a rectangle surrounding coordinates of each tower of the target line.
5. The statistical method for intersection and crossing of transmission lines with towers and lines according to claim 4, wherein the distance between the side of the rectangle in the east-west direction and the nearest tower coordinate in the target line is 0.02 latitude value.
6. The statistical method for intersection and crossing of transmission lines with towers and lines according to claim 5, wherein the distance between the side of the rectangle in the north-south direction and the nearest tower coordinate in the target line is 0.02 longitude value.
7. The statistical method for crossing between same tower and line of transmission line according to claim 6, wherein in step S3, if the distance between the coordinates of the target line tower and the coordinates of the other line towers is less than 5 m, it is determined that the tower is erected on the same tower.
8. The statistical method for crossing between same tower and line of transmission line according to claim 7, wherein in step S4, if the number of towers in the calculation area of the other line is less than or equal to 1, the other line does not cross the target line.
9. The statistical method for crossing between same tower and line of electric transmission line according to claim 8, characterized in that two adjacent tower coordinates of the target line are sequentially selected for crossing calculation, and finally the target line crossing condition is obtained.
10. The statistical method for the cross-over of the same tower and the line of the power transmission line according to claim 9, characterized in that each line is sequentially selected as the target line, and finally the cross-over condition of the same tower and the line of the whole power transmission line is obtained.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112487118A (en) * | 2020-11-30 | 2021-03-12 | 深圳供电局有限公司 | Power line crossing point analysis method and analysis system |
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