Method for measuring standard elevation in nuclear power engineering

Abstract

The invention relates to the field of nuclear power engineering, aiming to solve the technical prejudices of the prior art that when the standard elevation in the nuclear power engineering is measured, the measuring work load is great, great manpower and material resources are wasted, the measurement precision is low and a triangular elevation measurement method cannot be applied to the nuclear power engineering. The method for measuring the standard elevation in the nuclear power engineering, disclosed by the invention, comprises the steps that: at least one reference standard is selected in a measurement field and a measurement point is set so that a total station located at the measurement point can observe a standard to be detected and the reference standard; the total station is placed on the measurement point and the measurement point is opened to calibrate; a measurement accessory is placed on a target to be detected; the target to be detected is the reference standard and the standard to be detected; measured data is measured and processed to obtain the elevation of the reference standard relative to the standard to be detected; and the measured data is identified. The method for measuring the standard elevation has the advantages of simplicity in operation, less work load, lower cost and high precision, and overcomes the technical prejudice that the short-edge triangular elevation measurement precision is low.

Description

technical field [0001] The invention relates to the field of nuclear power engineering, in particular to a method for measuring the elevation of a reference in nuclear power engineering, and the reference is used for installation of nuclear power equipment or measurement of nuclear power equipment or other various measurements. Background technique [0002] In nuclear power engineering, the installation accuracy of nuclear power equipment is high. For example, the installation elevation accuracy of the main equipment in the nuclear island must reach 1mm (millimeter). Therefore, before the installation of nuclear power, the elevation of the measurement reference point or reference line for the installation and positioning measurement of nuclear power equipment must be measured first, and the measurement accuracy of the elevation of the reference point or reference line must reach the second-class level specified in the engineering survey specification The accuracy of the meas...

AI Technical Summary

Problems solved by technology

[0004] This measurement method has the following problems: first, the workload is heavy, and it requires the cooperation of multiple groups of staff to complete the measurement, which consumes a lot of manpower and material resources; second, the accuracy of the measurement results is greatly affected by the environment, unstable, For example, during the observation process, the steel pan ruler is easily affected by the environment and shakes or shifts, which leads to low accuracy of the measurement results; thirdly, when different surveyors observe the level instrument, the visual errors are different, resulting in inconsistencies in the measurement results. The error is relatively large; fourth, because precision leveling has strict requirements on front and rear sight distances, it must be strictly implemented in accordance with engineering measurement specifications, and the flexibility is poor

[0006] Although this method is relatively simple to operate, since the error of the centering rod itself is 5mm, the error of the height from the known point to the measurement center point of the total station reaches 2mm, and the measurement accuracy is low, resulting in the calculated Point elevations are less accurate

In addition, since the total station calculates the distance between the total station and the point to be measured by measuring the time it takes for the light emitted toward the point to be measured to reach the point to be measured and return to the total station, the distance between the total station and the point to be measured is calculated. Technical personnel in the field generally believe that the triangular elevation measurement method can only achieve the accuracy of the second-class leveling measurement specified in the engineering survey specification when the measurement distance is at least a few thousand meters long-distance measurement, and when the measurement distance is only a few hundred meters or even When the distance between the total station and the point to be measured is tens of meters, the time period for the beam to travel between the total station and the point to be measured is too short. Therefore, it is not suitable for short-distance measurement

And because the nuclear power plant engineering area is relatively small, most of which are within the range of one square kilometer, the maximum side length of the installation project area does not exceed 300m (meters), and the maximum side length of the nuclear island does not exceed 40m, so triangular elevation measurement cannot be used The method is to measure the height of the benchmark for the installation and positioning of nuclear power equipment in nuclear power engineering

Images