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Unidirectional precise distance measuring triangulated height measuring method

A triangular elevation and precision ranging technology, which is applied in height/horizontal measurement, measuring devices, surveying and navigation, etc., can solve the problem that the triangular elevation accuracy of one-way ranging is difficult to guarantee, etc.

Active Publication Date: 2015-11-11
POWERCHINA XIBEI ENG
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Problems solved by technology

[0004] Therefore, if the project does not have the opposite observation conditions, especially for some projects that are inconvenient for personnel to reach and are not suitable for exposure or frequent exposure, such as high-risk landslide monitoring projects, it limits the application of leveling and opposite-ranging triangular elevation measurement
When using one-way ranging triangulation height measurement, due to the influence of atmospheric refraction and other factors, the accuracy of one-way ranging triangulation elevation is difficult to guarantee

Method used

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  • Unidirectional precise distance measuring triangulated height measuring method
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Embodiment Construction

[0089] like image 3 Shown is the operation process of the present invention, and the specific implementation steps of the present invention are as follows:

[0090] 1 The layout of the reference direction and the points to be measured

[0091] The layout of the reference direction and the points to be measured should be constructed according to the actual terrain characteristics of the project. The main principles are as follows:

[0092] 1). Arrange the points to be measured (observation target points) according to the project requirements, and carry out the layout of the reference points on the basis of the determination of the points to be measured. The reference points include the reference points for direct observation of the points to be measured and the real-time atmospheric vertical The reference direction point of the refraction coefficient (note: the reference direction proposed in the article refers to the direction determined from the reference point to the refer...

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Abstract

The invention provides an unidirectional precise distance measuring triangulated height measuring method. The unidirectional precise distance measuring triangulated height measuring method is mainly used for determining atmospheric vertical refraction coefficient in trigonometric leveling, and determining weighing value in network adjustment of ranging trigonometric leveling. The unidirectional precise distance measuring triangulated height measuring method mainly comprises following steps: laying of a reference point and points to be measured, and height determination of the reference point and the points to be measured; acquisition of sample data used for refraction coefficient correlativity determination; calculation of refraction coefficients of observed orientations; determination of refraction coefficient correlativity of observed orientations, and variance estimation; calculation of unidirectional distance measuring triangulated height; and weighing value determination and survey adjustment in unidirectional network adjustment of ranging trigonometric leveling. The unidirectional precise distance measuring triangulated height measuring method is suitable for height measurement in repeat and high risk environment, is capable of obtaining height of projects lack of bi-directional observation conditions, or projects used for increasing trigonometric leveling precision via determining refraction coefficient difference, or projects adopting unidirectional trigonometric leveling instead of bi-directional trigonometric leveling so as to reduce cost.

Description

technical field [0001] The invention belongs to the technical field of distance-measuring triangular height measurement, and in particular relates to a one-way precise distance-measuring triangular height measurement method. Background technique [0002] Although the current continuous development of GNSS technology has provided great convenience for the acquisition of spatial data. Under some specific conditions, its plane relative positioning accuracy has even reached submillimeters. The influence of its own measurement accuracy and other factors limits its promotion in the field of higher-precision height measurement, so the height still uses a large number of traditional measurement methods. At present, there are two main methods for higher-precision height measurement, one is leveling , and the other is precision ranging triangular elevation, in which leveling measurement has the highest accuracy and is almost irreplaceable in some high-precision elevation measurement. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 李祖锋
Owner POWERCHINA XIBEI ENG
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