Method for constructing geographic coordinate system with laser tracker

A laser tracker and geographic coordinate system technology, which is applied to instruments, theodolites, optical devices, etc., can solve the problem of not having the latitude and longitude directions, and achieve the effects of high precision, easy calculation, and simple structure.
CN102435140AInactive Publication Date: 2012-05-02SHANGHAI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI UNIV
Publication Date
2012-05-02
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a method for constructing a geographic coordinate system with a laser tracker. A level of the laser tracker is aligned with the geoid, so that the horizontal of the place where the tracker is located is found, a high-precision theodolite is then utilized to find the direction of the true north, the adjusted theodolite is used for measuring the horizontal angles between fourtarget balls placed according to certain requirement, the tracker measures and projects the four target balls into a horizontal plane, so that the mutual positional relation among the four points in the horizontal plane is obtained, and by means of calculation, the horizontal included angle between the connecting line of the projected points of the corresponding target balls and the direction of the true north can be obtained. Finally, tracker software is used for establishing a coordinate system (the origin is given according to the requirement) with the direction of the connecting line of the projected points of the corresponding target balls and the direction of the normal vector of the horizontal plane as axes and rotating the coordinate system around the direction of the normal vector of the horizontal plane for the horizontal included angle, and thereby the needed geographic coordinate system is obtained. The method enables laser tracker to have the function of establishing the geographic coordinate system, and can also be applied to other cases needing the establishment of geographic coordinate systems.
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Description

technical field

[0001] The invention relates to the field of industrial digital measurement, and relates to a method for constructing a geographic coordinate system, in particular to a method for a laser tracker to construct a geographic coordinate system. Background technique

[0002] The geographic coordinate system, also known as the real-world coordinate system, is the coordinate system used to determine the position of objects on the earth. The most commonly used geographic coordinate system is the latitude-longitude coordinate system: the longitude and latitude of the earth are the coordinate axes, the longitude is the east-west direction, and the latitude is the north-south direction. This coordinate system is also widely used in the field of industrial digital measurement.

[0003] The geographic coordinate system contains six basic elements. The normal vector directions that can be determined by the principles of latitude and longitude and the right-handed coordina...

Claims

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