Measuring Method of Suspended Height Based on Similar Triangles

A technology similar to triangles and measurement methods, applied in the field of measurement, can solve problems such as the inability to measure the horizontal distance and the inability to erect a prism, and achieve the effect of simple operation process, simple derivation process, and reliable theoretical basis

Active Publication Date: 2018-02-16
CHINA RAILWAY SHANGHAI DESIGN INST GRP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] For this problem, because a prism cannot be erected at point P, the horizontal distance from point P (or P″) to the set point cannot be measured, so it cannot be directly measured with the suspension height measurement program

Method used

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  • Measuring Method of Suspended Height Based on Similar Triangles
  • Measuring Method of Suspended Height Based on Similar Triangles
  • Measuring Method of Suspended Height Based on Similar Triangles

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Embodiment

[0021] Example: such as figure 1 As shown, it is desired to obtain the elevation of the point P" to be measured on the high-voltage line M"N", and the plane coordinates of P" corresponding to the ground point P are known as P , Y P ), MN is the projection of M"N" on the ground Ψ.

[0022] The method for measuring suspension height based on triangles in this embodiment includes the following steps:

[0023] 1) Set up a station at point O with known spatial coordinates, the coordinates of O point are (x O , Y O , H O ), point A is any known point on the ground as the first reference point, and the coordinates are (x A , Y A , H A ), the elevation h of the first reference point A and the point to be measured P″ at the set site O O The projection points of the horizontal plane are A′(x A , Y A , H O ), P′(x P , Y P , H O ).

[0024] The horizontal distance of OP' is inversely calculated by the spatial coordinates of the projection point P'of the station O and the point to be measured P″ o...

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Abstract

The invention relates to the technical field of measurement, in particular to a remote elevation measuring method based on similar triangles. The remote elevation measuring method is characterized by comprising the following step: calculating the elevation of a point to be measured through a horizontal distance between a set site and a projection point of the point to be measured on an elevation level surface of the set site, a horizontal distance between the set site and the projection point of a second reference point on the elevation level surface of the set site, and space coordinates of the projection point of the second reference point on a connecting line of the set site and the point to be measured according to a geometrical relationship of the similar triangles. The remote elevation measuring method disclosed by the invention has the advantages that the formula derivation process is simple, the theory basis is reliable, the operation process is simple, and the elevation measurement precision is high.

Description

Technical field [0001] The present invention relates to the technical field of measurement, in particular to a method for measuring suspension height based on similar triangles. Background technique [0002] Suspended height measurement refers to the measurement of the distance between a certain point in the air and the ground. The basic principle of measuring the height of a point to be measured in the air is to use the horizontal distance and angle relationship to calculate. Therefore, the prerequisite for the suspension height measurement is to be able to carry out ranging and angle measurement. [0003] In the railway survey, when the railway intersects the high-voltage line, it is necessary to measure the height of certain points of the high-voltage line within a certain range above the railway design line to determine whether the high-voltage line affects the railway construction and operation. At this time, the high-voltage line needs to be surveyed. When there is a large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/26G01C3/30
CPCG01C3/26G01C3/30
Inventor 陈晓林王文庆
Owner CHINA RAILWAY SHANGHAI DESIGN INST GRP
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