|Table of Contents|

Application of LiDAR Technology in Deformation Analysis of Yingxian Wooden Pagoda(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年02期
Page:
109-117
Research Field:
Publishing date:

Info

Title:
Application of LiDAR Technology in Deformation Analysis of Yingxian Wooden Pagoda
Author(s):
GUO Ming1; 2; 3; 4;  YAN Bing-nan1;  ZHOU Teng-fei1;  CHEN Zhao-yang2;  ZHANG Chen1;  LIU Yun-ming5
(1. School of Geomatics and Urban Spatial Informatics, Beijing University of Civil Engineering and Architecture, Beijing 102616, China; 2. Engineering Research Center of Representative Building and Architectural Heritage Database of Ministry of Education,
Keywords:
Yingxian wooden pagoda;  deformation analysis;  LiDAR scanning;  point clouds model
PACS:
TU196
DOI:
10.19815/j.jace.2019.03061
Abstract:
In order to protect Yingxian wooden pagoda better, it is necessary to analyze the degree of deformation and understand the health status, so as to formulate a scientific protection program. The monitoring data was collected by the combination of lidar scanning and total station control measurement by using ground lidar, high-precision total station and other measuring sensors. Firstly, the collected point clouds data was preprocessed, and the external point clouds were registered by the overall registration method. The internal point clouds performed two registrations of coarse registration through feature and fine registration by the iterative closest point(ICP)algorithm, which were the main data of deformation analysis and required high accuracy. After registration, the coordinate transformation between internal and external point clouds was carried out according to control points. The space transformation parameters were solved by Rodrigues matrix and finally the overall point clouds model in absolute coordinate system was obtained. The point clouds model was cut in various ways to measure the deviation angles and distances of columns and the inclination angles of whole pagoda. Then the deformations of the single column, single layer and the whole pagoda were quantitatively analyzed. The results show that all the columns of Yingxian wooden pagoda are deformed, the second layer of Yingxian wooden tower has a large deformation, of which the M2W23 column has the most serious inclination. Each layer inclines to the northeast in varying degrees, the inclination degree of the southwest columns is generally large. On the whole, the wooden pagoda inclines to the northeast with complex torsional deformation, the west side is turned clockwise from the south to the north, but the east side is turned counterclockwise from the south to the north. In brief, Yingxian wooden pagoda is undergoing serious deformation, which urgently needs protection.

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Last Update: 2020-04-21