Double-theodolite baseline flexible north guiding method

Abstract

The invention relates to a double-theodolite baseline flexible north guiding method. The method belongs to the general technical field of north introduction of a double-theodolite line segment pointing to a measurement baseline (a double-theodolite connecting line). The technical problems that the double theodolites are relatively close to each other, and a coordinate calculation method and a satellite north measurement method are adopted, so that a baseline north direction introduction error is relatively large are solved. According to the method, two-theodolite, three-theodolite and two-to-three theodolite north guiding models can be established according to different theodolite numbers (two or three theodolites) and different north assignment modes (autonomous north seeking or north assignment by using known north orientation), so that flexible north guiding of double theodolite baselines is realized. According to the two-theodolite north guiding models, J base north = J north-J terminal point + pi, and J base north = J north-J starting point + 2pi; according to the three-theodolite north guiding model, J base north = J north + J3-J terminal point, and J base north = J north + J3-J starting point + pi; and according to the two-to-three theodolite north guiding model, J base north = J north + J terminal point + J movement-2pi, and J base north = J north + J starting point + J movement-pi. The method is mainly used for performing absolute pointing measurement on a line segment by adopting the double theodolites, is not limited by the size of a site, and can conveniently realize high-precision flexible north guiding operation of a double-theodolite baseline indoors and outdoors.

Description

technical field [0001] The invention relates to a northward universal introduction method of a double theodolite baseline (double theodolite connecting line). Background technique [0002] The double theodolite measurement method, as an important means to measure the elevation angle and azimuth angle of the space line segment, has the advantages of high precision and easy implementation, and is widely used. In order to accurately measure the absolute pointing of the space line segment, when the position of the double theodolite is determined, it is necessary to accurately give the north direction of the connection line of the double theodolite, that is, the north direction of the baseline. The baseline of the double theodolite can be calculated according to the coordinates of the placement of the two theodolites, or a satellite north finder terminal can be installed on each of the two theodolites, and the north direction of the baseline can be obtained through the satellite ...

AI Technical Summary

Problems solved by technology

However, when the two theodolites are placed close together, they will be affected by the coordinate reckoning method and the satellite north finding method due to the large error due to the short distance.

Therefore, the method of coordinate reckoning or satellite north finding is not applicable.

Images