Method for measuring and locating virtual tetrahedron top of abnormity component

Abstract

The present invention discloses a method for measuring and locating the tops of the virtual tetrahedron of the special-shaped component. In a special-shaped node three-dimensional body, four points which are not in a same surface are chosen to form a virtual tetrahedron. The three-dimensional coordinates of the four points are calculated and the corresponding marks of the four points are marked on the real object of the node. A random point is chosen as a main control point of the node and other points are taken as auxiliary control points. When the node is hanged to the station, firstly the three-dimensional coordinate of the main control point is monitored with an electronic total station at the position of the measuring point, and on the moulding bed of the node, the adjustment is executed by means of equipment to accurately control the plan position and scale height of the main control point. The planar and vertical three-dimensional rotation adjustments are executed while the node takes the main control point as a center until when the monitored reading number of the coordinate of other three auxiliary control points is fit with the calculated value. When the node is measured and is accurately mounted, the node is welded on the positioning device of the moulding bed for temporary fixing. The method of the invention has the advantages of simple principle, reliable method, convenient realization, high work efficiency and broad application sphere.

Description

technical field [0001] The invention relates to a measurement and positioning method for construction and installation of structures or components, in particular to a measurement and positioning method for virtual tetrahedron vertices of special-shaped components. Background technique [0002] Modern architectural modeling emphasizes the integration with the environment and regional culture, and makes the building shape more and more beautiful and personalized. For special-shaped steel structures that use square, rectangular, asymmetric trapezoidal and other non-circular cross-section steel pipes as structural members, the unique architectural shape brings great difficulty to installation and construction. Since the lengths of the bars of the special-shaped structure are different, the angles between the bars and the ground are different, and the plane angles between the bars are also different. Each node is connected with several rods and pipes, and the characteristics of ...

AI Technical Summary

Problems solved by technology

There are many intersecting openings connecting rods on special-shaped nodes. The measurement and positioning of a node not only includes the plane and elevation position of the node, but also includes the orientation of all the rods connected to the node. Therefore, the general method of steel structure construction measurement and positioning, That is: the method of measuring alignment based on the axis of the component will not be or very inconvenient to be applied to the construction of special-shaped structures

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