Deformation Monitoring Method of Railway Buildings Based on 3D Laser Scanning Technology

2020 ◽  
pp. 9-16
Author(s):  
Yang Yu ◽  
Fengqin Zhang
Keyword(s):  
Laser Scanning ◽  
Deformation Monitoring ◽  
3D Laser Scanning ◽  
Monitoring Method

scholarly journals RESEARCH ON COORDINATE TRANSFORMATION METHOD OF GB-SAR IMAGE SUPPORTED BY 3D LASER SCANNING TECHNOLOGY

2018 ◽  
Vol XLII-3 ◽  
pp. 1757-1763 ◽  
Author(s):  
P. Wang ◽  
C. Xing
Keyword(s):  
Coordinate System ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Estimation Method ◽  
Image Plane ◽  
Point Clouds ◽  
Transformation Method ◽  
Deformation Monitoring ◽  
Sar Image ◽  
3D Laser Scanning

In the image plane of GB-SAR, identification of deformation distribution is usually carried out by artificial interpretation. This method requires analysts to have adequate experience of radar imaging and target recognition, otherwise it can easily cause false recognition of deformation target or region. Therefore, it is very meaningful to connect two-dimensional (2D) plane coordinate system with the common three-dimensional (3D) terrain coordinate system. To improve the global accuracy and reliability of the transformation from 2D coordinates of GB-SAR images to local 3D coordinates, and overcome the limitation of traditional similarity transformation parameter estimation method, 3D laser scanning data is used to assist the transformation of GB-SAR image coordinates. A straight line fitting method for calculating horizontal angle was proposed in this paper. After projection into a consistent imaging plane, we can calculate horizontal rotation angle by using the linear characteristics of the structure in radar image and the 3D coordinate system. Aided by external elevation information by 3D laser scanning technology, we completed the matching of point clouds and pixels on the projection plane according to the geometric projection principle of GB-SAR imaging realizing the transformation calculation of GB-SAR image coordinates to local 3D coordinates. Finally, the effectiveness of the method is verified by the GB-SAR deformation monitoring experiment on the high slope of Geheyan dam.

Development of Terrain Deformation Monitor System Based on 3-D Laser Scanning Technology

2010 ◽  
Vol 36 ◽  
pp. 192-198 ◽  
Author(s):  
Yang Zhou ◽  
Lei Yang ◽  
Yuan Bao Leng
Keyword(s):  
Laser Scanning ◽  
Deformation Monitoring ◽  
Monitor System ◽  
Terrain Analysis ◽  
Practical Application ◽  
Gis Technology ◽  
Monitoring Method ◽  
Mine Production ◽  
Disaster Assessment ◽  
Working Principle

This paper introduced the working principle of 3-D laser scanning technology, analyzed the feasibility of monitoring changes in topography based on the technology, designed the method to monitor the change of terrain, achieved the terrain deformation monitor system by the using of GIS technology, carried out the practical application of terrain deformation monitoring tests, and with the comparison with traditional deformation monitoring method. Terrain deformation monitor system based on 3-D laser scanning technology can quickly and efficiently got many kinds of results. The research presented a new, practical approach for terrain deformation monitor. The method can also be applied in the fields of terrain analysis, disaster prevention and mitigation, disaster assessment, soil erosion and mine production estimates and so on.

Measurement of erosion state and refractory lining thickness of blast furnace hearth by using three-dimensional laser scanning method

2020 ◽  
Vol 118 (1) ◽  
pp. 106
Author(s):  
Lei Zhang ◽  
Jianliang Zhang ◽  
Kexin Jiao ◽  
Guoli Jia ◽  
Jian Gong ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Laser Scanning ◽  
Refractory Lining ◽  
Three Dimensional ◽  
3D Laser Scanning ◽  
Scanning Method ◽  
Blast Furnace Production ◽  
Severe Erosion ◽  
Residual Thickness ◽  
Minimum Depth

The three-dimensional (3D) model of erosion state of blast furnace (BF) hearth was obtained by using 3D laser scanning method. The thickness of refractory lining can be measured anywhere and the erosion curves were extracted both in the circumferential and height directions to analyze the erosion characteristics. The results show that the most eroded positions located below 20# tuyere with an elevation of 7700 mm and below 24#–25# tuyere with an elevation of 8100 mm, the residual thickness here is only 295 mm. In the circumferential directions, the serious eroded areas located between every two tapholes while the taphole areas were protected well by the bonding material. In the height directions, the severe erosion areas located between the elevation of 7600 mm to 8200 mm. According to the calculation, the minimum depth to ensure the deadman floats in the hearth is 2581 mm, corresponding to the elevation of 7619 mm. It can be considered that during the blast furnace production process, the deadman has been sinking to the bottom of BF hearth and the erosion areas gradually formed at the root of deadman.

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