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Tower inclination measure method based on circle fitting

A technology of tilt measurement and circle fitting, applied in the field of tower tilt measurement based on circle fitting, can solve the problems of expensive laser scanner, large amount of data, unfavorable post-processing, etc.

Inactive Publication Date: 2014-12-10
TONGJI UNIV
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Problems solved by technology

Among the existing Chinese pagodas, the pavilion-style pagodas and dense-eave-style pagodas are the majority. These two types of pagodas are characterized by layer-by-layer contraction, bucket arch cornices, and deformation measurement feature points caused by fuzzy edges and corners. The method (determine the observation point at the corners of each floor and measure the coordinates of the corners of each floor with a total station) is difficult to determine the inclination state of the tower
[0003] Of course, the tilt state of the tower can be determined by 3D laser scanning technology, but the laser scanner is expensive, more than 1 million a set; and the amount of data acquired is large (massive data), which is not conducive to post-processing, so the whole station Measuring tower still has advantages

Method used

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  • Tower inclination measure method based on circle fitting
  • Tower inclination measure method based on circle fitting
  • Tower inclination measure method based on circle fitting

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Embodiment

[0066] Located in Hexian County, Anhui Province, China, the Wanshou Pagoda was built during the Three Kingdoms period. The plane of the tower body is hexagonal, the side length of the hexagon increases from the bottom of the tower with the height of the tower body, and the side length of the plane hexagon gradually decreases.

[0067] Based on the shape of the Wanshou Pagoda, there is no ready-made vertical surface or vertical line on the tower body that can be used as the characteristic mark of the inclination measurement. Therefore, the inclination measurement: firstly collect the three-dimensional coordinates of the feature points on the six outer surfaces of the tower body, and then make each wall according to the feature points. The position of the surface, and then obtain the section of the hexahedron at a certain height of the wall at the measured position, obtain the geometric center of the hexagonal plane, and obtain the central axis of the tower body through the geome...

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Abstract

A related tower inclination measure method based on circle fitting comprises the following steps: 1) fitting plane equations of all planes corresponding to a polygonal tower; 2) obtaining vertex coordinates at high positions of tower marks at all layers according to the plane equations of all planes; 3) determining the center coordinates of all layers of the tower by employing a circle fitting method, namely determining the plane circle center approximate value of planes at all layers of the tower by utilizing the vertex coordinates of all layers, and then finding the centers of all layers of the tower by utilizing the circle fitting method; and 4) finally obtaining a space straight line with smallest error by utilizing the center coordinates of all layers, and taking the space straight line as an axis of the tower, so as to obtain the inclination degree and direction of the tower. Compared with the prior art, the method has the advantages of precise measuring, usage convenience, wide application scope and the like.

Description

technical field [0001] The invention relates to a tower inclination evaluation method, in particular to a tower inclination measurement method based on circle fitting. Background technique [0002] Chinese pagodas originated from Indian Buddhist pagodas. In terms of appearance and structure, they are mainly divided into pavilion-style pagodas, dense eaves-style pagodas, pavilion-style pagodas, and bowl-covered pagodas. It is composed of four parts, Tasha and Tasha, which mainly play the role of commemorating Buddha and Buddhist activities, suppressing demons and expelling evil spirits, offering sacrifices and praying, and commemorating. Among the existing Chinese pagodas, the pavilion-style pagodas and dense-eave-style pagodas are the majority. These two types of pagodas are characterized by layer-by-layer retraction, bucket arch cornices, and deformation measurement feature points caused by fuzzy edges and corners. It is difficult to determine the inclination state of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C9/00
CPCG01C9/00
Inventor 汤永净王穗辉
Owner TONGJI UNIV
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