A two-dimensional reference vertical transfer device and its measuring method

Abstract

The invention relates to a two-dimensional benchmark vertical transmission device and a measurement method thereof. A high-precision laser plummet is adopted for vertically projecting a plane two-dimensional benchmark control point at the bottom of a construction operation layer to line plummet hanging devices at different height faces, after a vertical projection point of the laser plummet and a steel wire line hanging center point are precisely adjusted to coincide with each other, the line plummet hanging devices are fastened, then a steel wire is tensioned by hanging a counter weight, and a two-dimensional coordinate benchmark and a vertical benchmark can be provided for installation and construction. The steel wire can be flexibly tensioned and hung at different positions and in different stages according to site operation requirements, and construction quality and construction progress are guaranteed. By means of the method, alignment errors, aiming and collimating errors, hanging and anchoring positioning errors and the like of instruments can be effectively reduced, and measurement precision and efficiency of plane benchmark vertical transmission are substantially improved.

Description

technical field [0001] The invention relates to a novel steel wire suspension device and a measurement method, in particular to a measurement device for vertically transmitting a two-dimensional reference by suspending the steel wire and then tensioning it and its application. Background technique [0002] In precision engineering measurement or metal structure and electromechanical equipment installation measurement, it is often encountered that some metal structures with large vertical height differences need to ensure that the embedded parts are consistent with the upper and lower datums of the installation parts, such as gate structures, large elevators, Structures such as vertical ship lifts. Taking the metal structure installation of the Three Gorges and Xiangjiaba vertical ship lifts as an example, the accuracy of the plane two-dimensional axis vertical projection is required to be less than or equal to ±3mm, and the construction accuracy and technical requirements ar...

AI Technical Summary

Problems solved by technology

[0003] Both of these two methods have certain defects: although the line-hanging method is very intuitive, the anchor point of the suspension is usually positioned by setting out the total station. At the same time, it is greatly affected by external meteorological factors such as wind force; the plummet projection method can provide a bottom-up benchmark, but it can only solve a single benchmark transfer, and cannot provide real-time benchmarks for installation technicians on site, and Affected by lighting conditions and projection height, the operation is cumbersome. The vertical collimator point-point method is expensive and not intuitive. During the point-point measurement, other installation processes must stop construction, and it is impossible to provide a benchmark for the installation site in real time, and the operation is also very cumbersome.

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