Orthogonal decoupling correction method for theodolite orientation correction model

Abstract

The invention relates to an orthogonal decoupling correction method for a theodolite orientation correction model. Aiming at the problems that a solved coefficient cannot represent the real size of each item and the model is low in stability because strong correlation exists in each primary function in the theodolite orientation correction model, the model is decoupled by using an orthogonal method, and the correlation between the primary functions is eliminated, so that a novel orthogonal orientation correction model is established, and a novel model coefficient can be deduced by using the original model coefficient. The method has the beneficial effects that coupling among items of the orientation correction model of any item can be removed, and the model is relatively stable under the condition that the primary functions are not reduced. Moreover, the true level of each error item can be reflected, so that the extrapolation of the model is possible.

Description

Technical field [0001] The invention belongs to the field of photoelectric measurement, and specifically relates to orthogonal decoupling of the theodolite pointing correction model and a correction method thereof. Background technique [0002] Due to the environmental parameters and the equipment itself, the pointing accuracy of theodolite often contains large systematic errors. System errors are caused by many factors, including atmospheric refraction, telescope manufacturing and assembly errors, gravity deformation of the telescope, and deformation errors caused by temperature changes. The structural factors of the telescope include shafting errors, lens barrel deflection, fork arms or Deformation of the yoke, etc. In order to achieve high-precision measurement in the entire airspace, the method of establishing a pointing correction model is often used to calibrate the system error, and then correct the pointing error of the entire airspace. Specifically, it is generally bas...

AI Technical Summary

Problems solved by technology

[0015] The technical problem solved by the present invention: overcome the problem that the correlation of the existing theodolite pointing correction model causes the fitting coefficient to not reflect the real size of each item, eliminate the coupling between the model items, so that the fitting coefficient and the basis function can be truly Establish a corresponding relationship, so that the model can be more stable, so as to realize the extrapolation of the model

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