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Novel altimetric measurement methods

A technology of elevation measurement and a new method, applied in the directions of height/level measurement, measurement device, surveying and navigation, etc., can solve the problem of low accuracy, and achieve the effect of improving measurement accuracy, speeding up measurement speed, and facilitating elevation measurement

Inactive Publication Date: 2009-04-08
GUANGZHOU DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new method of height measurement in order to overcome the disadvantage that the triangular height measurement method in the existing engineering cannot solve the low precision

Method used

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specific Embodiment 1

[0023] Measurement method of the present invention comprises the steps:

[0024] 1) Place the measuring instrument and the tracking prism rod at an elevation of H A The position A and the elevation H are B on the position B;

[0025] 2) Use a measuring instrument to measure the horizontal distance D between position A and position B AB , the angle α between the line connecting the top of the measuring instrument and the tracking prism rod and the horizontal line;

[0026] 3) Place the measuring instrument at the height of H again C =H A +i-v=H B -D AB At the position C of tanα, place the tracking prism rod at the position D of the elevation to be measured;

[0027] 4) Use a measuring instrument to measure the horizontal distance between position C and position D, and the angle θ between the line connecting the measuring instrument and the top of the prism and the horizontal line;

[0028] 5) According to formula H D =H C +D CD · tanθ obtains the elevation H of the p...

specific Embodiment 2

[0030] In this embodiment, the position C is set at a relatively far distance from the position D to be measured, considering the influence of the curvature of the earth and atmospheric refraction, the elevation H of the measured position D D Amendments are made, and the others are the same as in Example 1. According to the correction formula of spherical aberration and air difference, the elevation of position D can be obtained H D = H C + D CD · tan θ + ( 1 - k ) D CD 2 2 R , Among them, k=1 / 7, R is the radius of the earth.

specific Embodiment 3

[0031] Except that the position C is set at a shorter distance from the position D to be measured, the others are the same as the embodiment 1.

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Abstract

The invention discloses a height measurement new method, which is characterized by comprising the following steps: 1) firstly a measuring instrument and a tracking prism rod are arranged in the position A with height of HA and the position B with height of HB, respectively; the horizontal distance DAB between the position A and the position B and the angle Alpha between the top connecting line of the measuring instrument and the tracking prism rod, and the horizontal line are measured by the measuring instrument; 2) the measuring instrument is positioned at the position C with the height of HC equal to HA+i-v equal to HB-DAB question mark tanAlpha, and then the tracking prism rod is positioned at the position D with the height to be measured; the horizontal distance between the position C and the position D and the included angle Theta between the top connecting line of the measuring instrument and the tracking prism rod, and the horizontal line are measured by the measuring instrument; and 3) the height HD of the position D to be measured is gained by the formula HD equal to HC+DCD question mark tanTheta; wherein, i is the height of the measuring instrument, v is the height of the tracking prism rod, and the height HB of the position B is known height. The invention greatly simplifies the operating steps and reduces the error sources, and greatly enhances the work efficiency and the measurement accuracy.

Description

technical field [0001] The invention relates to a new method of elevation measurement, which is suitable for small-scale engineering measurement requiring high precision. It belongs to the technical field of engineering measurement. Background technique [0002] In engineering construction survey, height measurement is often involved. Height measurement is based on the height difference between the known height of one point and another point, and then according to the definition of height difference, the height of unknown point is obtained. At present, elevation measurement is divided into leveling, triangulation elevation measurement, GPS altimetry, barometer altimetry, etc. according to the instruments and measurement methods used. Leveling measurement is to measure the height difference between two points by leveling instrument and leveling rod according to the horizontal line of sight. The leveling method can be used to obtain high-precision elevation data in a small ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00
Inventor 周远文
Owner GUANGZHOU DESIGN INST
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