Method for leveling measurement of opposite observation by compound level with double observation units

Abstract

The invention discloses a method for measuring an opposite-direction observation level of a dual-observation unit composite level gage capable of effectively improving the level measurement accuracy and reliability. According to the method, the dual-observation unit composite level gage comprising a first single level gage and a second electronic level gage is adopted, and four-system opposite-direction observation is realized. The defect that the conventional composite level gage double system is unstable in opposite-direction measurement and poor in reliability is overcome, the influences ofobservation locality and random variation on the overall transverse level measurement are effectively avoided, the smoothness of transverse level measurement is improved, the level measurement reliability is ensured, the level measurement accuracy is greatly improved, and the effect from quantitative change to qualitative change is achieved.

Description

technical field [0001] The invention belongs to the technical field of surveying, and in particular relates to a leveling method for opposite observation of a compound level with dual observation units, which can effectively improve the precision and reliability of leveling. Background technique [0002] A traditional level measuring device is composed of a level and two leveling rods. When measuring, first place the two leveling rods on the ground at points A and B respectively, then set the level at the middle position of the two points A and B, and use the horizontal line of sight of the leveling instrument telescope to read the two points respectively. The elevation value of the leveling rod, the difference between the measured elevation values ​​is the level difference between the two points A and B on the ground. If the elevation of one point is known, the elevation of the other point can be calculated from the height difference. The main disadvantages of traditional ...

AI Technical Summary

Problems solved by technology

The main shortcomings of traditional leveling devices are: (1) Low measurement efficiency and reliability

Realizing the reasonable allocation of the position between the three points of the leveling instrument and the leveling rod in a complex terrain environment often consumes a lot of energy and time of the surveyors, which affects the measurement efficiency; (2) The measurement is limited by the terrain environment

When encountering complex terrain environments such as steep slopes, ditches, ravines, rivers, and mountainous areas, it is often impossible to set up the level at the middle of the two leveling rods, resulting in the impossibility of leveling measurement

(3) Must be retested

A large number of experiments and field measurements show that there is a serious problem in the leveling measurement of the existing composite level gauges: as long as the i-angle correction of the observation unit of one composite level gauge is inaccurate (in fact, it is out of limit), it will cause the double system check to exceed the limit, As a result, the height difference measurement results of the station are unqualified, and the wire measurement cannot be carried out. At the same time, it is difficult to determine which i-angle of the composite level is abnormal, and it is not convenient to correct it in time

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