High-precision compensation method for horizontal angle of electro-optic theodolite

Abstract

The invention relates to a high-precision compensation method for a horizontal angle of an electronic total station, an electronic theodolite and the like with angle compensation. The method comprises the following steps of: providing a high-precision compensation mathematical model for the horizontal angle; arranging two electronic levels in directions parallel to a horizontal axis and a collimation axis of the theodolite respectively; characterizing an inclination angle of a vertical axis of the theodolite by inclination angles in the horizontal axis direction and the collimation axis direction of the theodolite, wherein the inclination angles in the horizontal axis direction and the collimation axis direction are measurement outputs of the electronic levels in corresponding directions,and are used as matrix elements to establish an initial matrix when the vertical axis of the theodolite is inclined; and representing the rotating process of a measured angle of the theodolite by using the corresponding matrix; and finally obtain a real measurement model value of the horizontal angle of the theodolite when an error of the vertical axis inclination exists. Compared with the prior art, the invention provides the precise mathematical model established through coordinate transformation, and the new model is applied to the high-precision measurement of the horizontal angle of the theodolite, so that the compensation precision is higher, the error compensation range is wider, and the method is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of electronic surveying and mapping instruments, and relates to a high-precision horizontal angle compensation method applied to surveying and mapping instruments such as electronic total stations and electronic theodolites with angle compensation. Background technique [0002] For surveying and mapping instruments such as electronic theodolites, the premise of accurate angle measurement is that the horizontal axis, vertical axis and the collimation axis of the theodolite are orthogonal to each other, and the horizontal axis is horizontal and the vertical axis is vertical. Among them, the orthogonality between the three axes of the theodolite is the structural requirement of the instrument itself, and is one of the parameter indicators for whether the instrument is qualified when it leaves the factory. The level of the horizontal axis and the vertical axis of the vertical axis are guaranteed by the operator ...

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Problems solved by technology

[0006] However, it is difficult to measure v in the above formula in real time. In addition, the formula is derived based on the principle of spherical trigonometry. Therefore, the above-mentioned vertical axis tilt error compensation formula is only an approximate error compensation model, which cannot accurately reflect the influence of vertical axis tilt on horizontal angle measurement, and is only suitable for small vertical axis tilt errors. In the case of a large vertical axis tilt error, it is not applicable

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