Three-D track measuring marking-off method for segment of cable tower

Abstract

The invention relates to follow-up survey meter used three-dimensional laser to measure cable wire tower subsection. There are five points we must pay attention to that the first one is the supporting counterforce demand that the supporting counterforce must be controlled in the acceptable range according to the subsection distortional deformation; the second one is the supporting point place demand that the end face included angle of the subsection are the same both on an even keel or upright; the third one is the work piece and working environment temperature demand that the temperature difference of work piece side plate and web plate can not exceed two centigrade degree; and the working environment temperature is also the same; the forth one is the space measurement that subsection outline feature point and three laser station mark are processed by three-dimensional follow-up survey meter; and the measure data is used to form actual measuring data model; the fifth one is criteria calculation that it uses the theoretical data of the subsection end face angel point to make three-dimensional data model representation theoretical data model of the theoretical subsection, and uses measured data processing program to process least square method fitting for the theoretical subsection data model representation theoretical data model and the actual model in the same coordinate system.

Description

Technical field: [0001] The invention relates to a method for measuring steel cable tower segments by using a three-dimensional laser tracking measuring instrument, and performing six-dimensional calculation and processing on the measured data with software developed for processing the measurement data, belonging to the field of steel cable tower segment manufacturing. Background technique: [0002] In the field of segmental manufacturing of bridge steel towers in foreign countries, the traditional method of measuring and scribing end face processing is to measure with a steel tape and use a stylus to mark out the 8 midpoints on the wall panels of the two ports of the segment, and to control the force of the segment. And adjust it to a horizontal state. After uniform temperature, use theodolite, level and other optical measuring instruments to repeatedly measure and correct the marked midpoints, and re-determine 8 new midpoints. It is required that the newly determined midpoi...

AI Technical Summary

Problems solved by technology

The disadvantages of the traditional measurement and marking method are mainly that the operation process is complicated, the efficiency is low, and the marking accuracy is not high

According to the results of consulting with Japanese experts, it takes about 2 working days to complete the measurement and marking operation of a segment with the traditional measurement and marking method, which cannot meet the progress requirements of the bridge steel cable tower manufacturing project

In addition, from a technical point of view, it is possible to complete the measurement and marking of straight cable tower segments with the traditional measurement and marking method, but the bridge tower is a curved cable tower, and the traditional measurement and marking method cannot be used without improvement

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