CN100501109C - Vertex Measurement and Positioning Method of Virtual Tetrahedron for Special-shaped Components - Google Patents
Vertex Measurement and Positioning Method of Virtual Tetrahedron for Special-shaped Components Download PDFInfo
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- CN100501109C CN100501109C CNB2008100608948A CN200810060894A CN100501109C CN 100501109 C CN100501109 C CN 100501109C CN B2008100608948 A CNB2008100608948 A CN B2008100608948A CN 200810060894 A CN200810060894 A CN 200810060894A CN 100501109 C CN100501109 C CN 100501109C
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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
The present invention relates to the measurement and positioning method of structure or member construction and installation, especially relate to a kind of method for measuring and locating virtual tetrahedron top of abnormity component.
Background technology
The fusion with environment and regional culture is emphasized in the modern architecture moulding more, and makes the building body more and more attractive in appearance and personalized., rectangle square for adopting, asymmetric noncircular cross section steel pipe such as trapezoidal are as the obform body steel work of structural member, and unique architectural image brings great difficulty to installation.Because the length angle inequality, perpendicular to the ground of obform body structural member is inequality, the plane included angle between each rod member is also different mutually.Each node converges and has connected several rod tubes, and the characteristic that many different cross section type steel pipes and axis not exclusively intersect at any causes the node abnormity, brings very big difficulty for the measurement and positioning before the construction and installation.
Measurement and positioning is the key of decision obform body steel work high accuracy construction and installation accurately.Because Steel Structure Installation order generally is to follow rod member principle behind the first node, so accurately to be placed on the interim moulding bed be the key point and the difficult point of constructing in the location special-shaped node.The intersecting mouth that many connection rod members are arranged on the abnormity node, node of measurement and positioning not only comprises the plane and the elevation position of this node, and comprise all be connected with this node rod member towards, therefore, the conventional method of Construction of Steel Structure measurement and positioning, that is: with the member axis be the measurement of benchmark to method for position, can not or be inconvenient to very much be applied in the construction of obform body Structural Engineering.
Summary of the invention
The object of the present invention is to provide a kind of method for measuring and locating virtual tetrahedron top of abnormity component, is the measurement and positioning method that is primarily aimed at obform body steel work and member thereof.
The step of the technical solution adopted for the present invention to solve the technical problems is as follows:
1) on a special-shaped node said three-dimensional body plan, gets four not virtual tetrahedrons of the formation of the point in same plane, calculate the three-dimensional coordinate of these four points according to design drawing, on special-shaped node said three-dimensional body material object, make the respective markers of these four points then.
2) select on this abnormity node said three-dimensional body in four points arbitrarily a bit as measurement Master Node of this abnormity node said three-dimensional body, its excess-three point is assisted the control point as measurement.
3) special-shaped node said three-dimensional body is sling when in place, at first survey crew is monitored the three-dimensional coordinate of Master Node with total powerstation in the survey mark position, the constructor is positioned on the moulding bed of this abnormity node said three-dimensional body, adjust by Chain block, jack auxiliary equipment, with the plan-position and the absolute altitude of accurate control Master Node.
4) constructor on moulding bed by Chain block, jack auxiliary equipment, is this abnormity node said three-dimensional body that the three-dimensional rotation adjustment plane and facade is carried out at the center with the Master Node, coordinate monitoring reading and the accurate match of calculated value until its excess-three auxilliary control point, after laying this abnormity node said three-dimensional body measurement accurately, in time its point be welded in do on the positioner of moulding bed temporary fixed.
The present invention compares the beneficial effect that has with background technology:
1, principle is simple, and method is reliable, and it is convenient to implement, the work efficiency height.Only pass through not four points in same plane of measurement and positioning, just can reach the locus of a special-shaped node said three-dimensional body of accurate measurement control and the purpose of direction, removed the loaded down with trivial details work that conventional method need be measured each root center line of the bar on the contraposition abnormity node said three-dimensional body one by one from, not only solve engineering roadblock, and simplified the measurement and positioning correction work greatly.Because the principle of the invention is simple, method is reliable, has not only guaranteed the measurement and positioning precision, but also has improved operating efficiency.
2, applied widely.The inventive method can be applicable to connect the special-shaped node said three-dimensional body of any many rod members, what no matter have connect the intersecting mouth of rod members on special-shaped node said three-dimensional body, as long as according to principle of the present invention and method and according to step of the present invention, determine that on this abnormity node said three-dimensional body four points in same plane constitute a virtual tetrahedron, just can accurately finish locus and direction that measurement and positioning should abnormity node said three-dimensional body.
Description of drawings
Fig. 1 is an obform body structure elevational schematic view.
Fig. 2 is the signal of part abnormity node.
Fig. 3 is the inventive method schematic diagram.
The specific embodiment
Embodiment
Obform body structure as shown in Figure 1, its node is made up of similar special-shaped node said three-dimensional body shown in Figure 2.With special-shaped node said three-dimensional body as shown in Figure 3 is example, on this abnormity node said three-dimensional body plan, get four not virtual tetrahedrons of 1,2,3,4 formations of the point in same plane, its mid point 1 is a peak, calculate the three-dimensional coordinate of these four points according to design drawing, on special-shaped node said three-dimensional body material object, make the respective markers of these four points then.Except considering that survey measurements is convenient, when selecting virtual tetrahedron, should make the length on six limits close as far as possible and length is long as far as possible.The peak 1 of selecting this abnormity node said three-dimensional body is as measuring Master Node (also can select other more arbitrarily), assisting the control point with its excess-three point as measuring.Special-shaped node said three-dimensional body is sling when in place, at first survey crew is monitored the three-dimensional coordinate of Master Node 1 with total powerstation 0 position, the constructor is positioned on the moulding bed of this abnormity node said three-dimensional body, adjust by auxiliary equipment such as Chain block, jack, with the plan-position and the absolute altitude of accurate control Master Node 1.Then, the constructor on moulding bed by auxiliary equipment such as Chain block, jack, is this abnormity node said three-dimensional body that the three-dimensional rotation adjustment plane and facade is carried out at the center with Master Node 1, coordinate monitoring reading and the accurate match of calculated value until 2,3,4 three auxilliary control points.According to geometry principle as can be known, four not the point in same plane can determine a tetrahedron, when the three-dimensional coordinate of its four points was unique, this tetrahedral position and direction were unique.Because derive from a specific special-shaped node said three-dimensional body by 1,2,3,4 virtual tetrahedrons that constitute, the relative position of virtual tetrahedron and this abnormity node said three-dimensional body is constant, so also be unique with the position and the direction of this abnormity node said three-dimensional body of the measured location of the inventive method.No matter for which special-shaped node said three-dimensional body, if guaranteed by its constructed virtual tetrahedron measurement and positioning accurately, just can guarantee the accurate of this abnormity node said three-dimensional body measurement and positioning.
Special-shaped node said three-dimensional body is lifted on separately the interim moulding bed one by one, respectively they are carried out measurement and positioning with the inventive method.Consider in the actual engineering that structure manufacture, measuring apparatus, moulding bed installation etc. exist inevitable error, so, can be on special-shaped node said three-dimensional body when using the inventive method again the more options some spots so that check correction.After laying the measurement of special-shaped node said three-dimensional body accurately, in time its point be welded in do on the positioner of moulding bed temporary fixed.Begin to lift rod member after the lifting of abnormity node said three-dimensional body is finished, the stem member lifting put in place and with special-shaped node said three-dimensional body axis centering accurately after, the abnormity of spot welding in time node said three-dimensional body is connected with rod member temporarily.After the rod member lifting contraposition of at least three directions that are connected with a special-shaped node said three-dimensional body is connected and fixed temporarily, carry out the formal welding of special-shaped node said three-dimensional body and rod member again.It is the method that center symmetry, special-shaped node said three-dimensional body and each rod member weld simultaneously that welding is adopted with special-shaped node said three-dimensional body, to offset welding stress and welding deformation.
Claims (1)
1, a kind of method for measuring and locating virtual tetrahedron top of abnormity component is characterized in that the step of this method is as follows:
1) on a special-shaped node said three-dimensional body plan, gets four not virtual tetrahedrons of the formation of the point in same plane, calculate the three-dimensional coordinate of these four points according to design drawing, on special-shaped node said three-dimensional body material object, make the respective markers of these four points then;
2) select on this abnormity node said three-dimensional body in four points arbitrarily a bit as measurement Master Node of this abnormity node said three-dimensional body, its excess-three point is assisted the control point as measurement;
3) special-shaped node said three-dimensional body is sling when in place, at first survey crew is monitored the three-dimensional coordinate of Master Node with total powerstation in the survey mark position, the constructor is positioned on the moulding bed of this abnormity node said three-dimensional body, adjust by Chain block, jack auxiliary equipment, with the plan-position and the absolute altitude of accurate control Master Node;
4) constructor on moulding bed by Chain block, jack auxiliary equipment, is this abnormity node said three-dimensional body that the three-dimensional rotation adjustment plane and facade is carried out at the center with the Master Node, coordinate monitoring reading and the accurate match of calculated value until its excess-three auxilliary control point, after laying this abnormity node said three-dimensional body measurement accurately, in time its point be welded in do on the positioner of moulding bed temporary fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100608948A CN100501109C (en) | 2008-03-25 | 2008-03-25 | Vertex Measurement and Positioning Method of Virtual Tetrahedron for Special-shaped Components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100608948A CN100501109C (en) | 2008-03-25 | 2008-03-25 | Vertex Measurement and Positioning Method of Virtual Tetrahedron for Special-shaped Components |
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| Publication Number | Publication Date |
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| CN101255767A CN101255767A (en) | 2008-09-03 |
| CN100501109C true CN100501109C (en) | 2009-06-17 |
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| CNB2008100608948A Expired - Fee Related CN100501109C (en) | 2008-03-25 | 2008-03-25 | Vertex Measurement and Positioning Method of Virtual Tetrahedron for Special-shaped Components |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697871B (en) * | 2013-12-26 | 2016-01-20 | 沪东中华造船(集团)有限公司 | Total powerstation is used to realize the method for moulding bed automatic lofting peculiar to vessel detection |
| CN104196247A (en) * | 2014-08-27 | 2014-12-10 | 浙江精工钢结构集团有限公司 | Special-shaped spatial network structure node control installation method |
| CN105509673A (en) * | 2015-12-17 | 2016-04-20 | 上海蓝天房屋装饰工程有限公司 | Steel-structure net rack center positioning method based on six points on sphere |
| CN113670274A (en) * | 2021-08-09 | 2021-11-19 | 浙江东南网架股份有限公司 | Measuring and positioning method for spatial prismatic steel truss |
| CN113958141A (en) * | 2021-10-30 | 2022-01-21 | 中冶(上海)钢结构科技有限公司 | Spatial position positioning method for special-shaped bracket of tubular column |
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2008
- 2008-03-25 CN CNB2008100608948A patent/CN100501109C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 即时三维测量技术在网架施工中的应用. 邹存雨，马永生.建筑施工，第27卷第8期. 2005 * |
| 网架节点三维定位测量技术. 吴磊，熊红平，李传奇.施工技术，第36卷第6期. 2007 * |
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