Optimal inspection strategy planning for 3D geometric measurement based on laser scanning technique

2021 ◽  
Author(s):  
Sen Zhou ◽  
YiKun Xiong ◽  
Jian Xu ◽  
Tong Liu
Keyword(s):  
Laser Scanning ◽  
Scanning Technique ◽  
Inspection Strategy ◽  
Strategy Planning ◽  
Geometric Measurement

A Practical Computing Method for Residual Area of Rebar Cross-Sections under Carbonation Induced Corrosion

2012 ◽  
Vol 166-169 ◽  
pp. 1895-1899
Author(s):  
Xiao Gang Wang ◽  
De Ming Zhong
Keyword(s):  
Cross Sections ◽  
Laser Scanning ◽  
Major Axis ◽  
Structural Deterioration ◽  
Minimum Residual ◽  
Degree Of Confidence ◽  
Conservative Approximation ◽  
Rc Slabs ◽  
Computing Method ◽  
Geometric Measurement

Area loss of severely weakened rebar cross sections is a crucial variable in assessment of structural deterioration for corroded concrete structures, which is hard to be measured or estimated precisely in conventional methods. In this paper, rebar samples were taken from naturally corroded RC slabs. Their virtual models were built using 3D laser scanning technique to facilitate geometric measurement. From these models seriously weakened sections were screened out as analyzing samples, and residual areas as well as profiles of the cross-sections were derived and investigated consequently. Shown by the results, corrosion was non-uniformly distributed on rebar surface, and profiles of the residual cross-sections can hardly be formulated efficiently. However, they can be simplified into ellipse with minor axis of minimum residual diameter and major axis of diameter in perpendicular direction. This model has been proved to give an conservative approximation of residual sectional area with 4.27% underestimation and 89.2% degree of confidence.

Laser Scanning Technique for the Investigation of Power Devices

2009 ◽  
pp. 239-239-12 ◽  
Author(s):  
O Engström ◽  
B Drugge ◽  
PA Tove
Keyword(s):  
Laser Scanning ◽  
Power Devices ◽  
Scanning Technique
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