Double-person reading method for improving accuracy of leveling measurement

Abstract

The invention discloses a double-person reading method for improving the accuracy of leveling measurement, which comprises the following steps of: selecting a surveyor, a leveling rod, a rod support and a leveling instrument; laying a branch leveling line; setting a back-sight rod, a leveling instrument and a foresight rod; reading a reading on the back-sight rod by the surveyor, reading the reading again by a recorder, checking whether the readings of the surveyor and the recorder have an error, if so, re-observing the back-sight rod until no error exists, and then recording the reading by the recorder; rotating the leveling instrument to aim at the foresight rod by the observer, reading a reading on the foresight rod by the observer, then reading the reading by the recorder, checking whether the readings of the observer and the recorder have an error, if so, re-observing the foresight rod until no error exists, then recording the reading in a short-hand note by the recorder, and calculating the height difference between the reading of the back-sight rod and the reading of the foresight rod; moving the leveling instrument to a second observation station, and repeating the steps 3)-5) so as to perform the operation of the second observation station, and sequentially carrying out observation along the branch leveling line until a target leveling point is observed; and calculating a height difference delta h and the algebraic sum sigma delta h of all the observation stations, and judging the relative heights of a known elevation leveling point A and an unknown elevation leveling point B. According to the invention, the labor intensity of the measuring personnel is reduced, and the speed of the project progress is improved.

Description

technical field [0001] The invention relates to a method for improving leveling accuracy. In particular, it relates to a two-person reading method for improving leveling accuracy that only needs to measure one single pass. Background technique [0002] The current common leveling method is exactly one person to set up the leveling instrument and read, one person to record and calculate the height difference, and two people to support the leveling rod. Since one person observes the scale on the leveling rod and reads the measurement, there is no process of checking whether the reading is correct or not, and it is impossible to know whether the reading is correct or not. The leveling routes laid out in the metallurgical industry are generally branch leveling routes, and there is no joint measurement at the end In order to check the measurement results and improve the accuracy of the observation results, the State Bureau of Surveying and Mapping stipulates that a single leveli...

AI Technical Summary

Problems solved by technology

Since one person observes the scale on the leveling rod and reads the measurement, there is no process of checking whether the reading is correct or not, and it is impossible to know whether the reading is correct or not. The leveling routes laid out in the metallurgical industry are generally branch leveling routes, and there is no joint measurement at the end In order to check the measurement results and improve the accuracy of the observation results, the State Bureau of Surveying and Mapping stipulates that a single leveling route must be measured round-trip, and the total length of the route should be limited. In general topographic surveying, it cannot over 4KM

Applying the current measurement method, often after a round-trip measurement is completed, it is found that the error of the previous measurement data is relatively large compared with the return measurement data, and the accuracy of the observation is not high. It can be said to be an obvious error, but it cannot be checked out which one is Errors at the station, such observation results cannot meet the accuracy requirements of the project, so re-measurement is necessary. If the length of the leveling line is too long, re-observation will definitely waste a lot of time and personnel, and increase the work of the surveyors. Labor intensity, but also slow down the progress of the project

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