Line and tower footing automatic lofting method and system

Abstract

The invention provides a line and tower footing automatic lofting method and system. The line and tower footing automatic lofting method comprises steps that coordinates of an angle tower, a lofting radius of a tower footing and coordinates of a current point location are obtained; the coordinates of the angle tower, the lofting radius of the tower footing and the coordinates of the current point location are inputted into an automatic lofting model to obtain lofting measurement data, and line and tower footing lofting is carried out according to the lofting measurement data; the automatic lofting model obtains the starting point distance and the ending point distance from the current point position to the strain section; an accumulated distance and an offset distance of the current point location in the whole line are obtained according to the starting point distance and the ending point distance; a tower position center coordinate of a starting point or an end point (depending on which distance between the starting point or the end point is smaller than a tower footing lofting radius) of a strain section is used as a lofting point, the lofting point is used as an original point of a rectangular coordinate system or a polar coordinate system, and an angular bisector of an acute angle included angle of two line segments which are adjacently connected with the lofting point is used as a y axis or a polar axis; the transverse distance, the longitudinal distance, the polar angle and the slant distance of the current point position relative to the lofting point are obtained, lofting measurement data are outputted, manual calculation and manual line building errors are avoided, and through field tests, tower footing lofting efficiency is improved by 80% under the condition that the precision of the lofting point is not changed, and operation stability is good.

Description

technical field [0001] The disclosure belongs to the technical field of power transmission engineering design, and in particular relates to an automatic lofting method and system for lines and tower foundations. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] At present, the stakeout methods for transmission lines and tower foundations are mainly polar coordinate method and line coordinate method. [0004] The polar coordinate method is the main method for setting out tower bases of total stations and theodolites, and this method is generally used when GPS is used for tower base setting out. When lofting tower foundations, the center coordinates of the rear, middle, and front three tower positions or the coordinates of the middle and rear two towers + the azimuth of the forward direction are known. Angle and distance, and then use the ...

AI Technical Summary

Problems solved by technology

This method can stake out any straight tower and corner tower according to the designed semi-heel, but when the tower position is adjusted, the coordinates of the straight line direction point of the tower base need to be recalculated on site, and the error tolerance rate is low and the efficiency is low

[0006] In addition, the above two methods need to enter the corner coordinates in the total station or GPS handbook in the actual operation of tower foundation stakeout, and perform manual line building operations, the steps are cumbersome, and it is easy to cause misoperation

Moreover, line stakeout and tower base stakeout sometimes need to switch between two methods to complete, which is less efficient

[0007] That is to say, there are currently technical problems such as cumbersome steps for data input and line construction during the stakeout process of transmission lines and tower foundations, low efficiency in manual calculation of angles, distances, and coordinates, and inability to use different stakeout methods at the same time

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