Chapter
Jan 18, 2013
Damage Evaluation Using LiDAR Scan and Smart Piezo Layer
Authors: Shen-En Chen, Howard Chung, Youngjin Park, Shannon Bell, and Alex DeatonAuthor Affiliations
Publication: Forensic Engineering 2012: Gateway to a Safer Tomorrow
Abstract
Advanced nondestructive sensing techniques have been used for structural evaluation. However, measurements of most techniques are not valid when large deformations occur. The reason for the invalidity is the fundamental assumptions of elasticity in measurement technique and that large geometric distortion resulted in mismatching of damage data to surface topologic data. To address the mismatch issue, this paper reports the results of combining an internal stress measurement technique using piezoelectric (PZT) sensing, and a surficial topology measurement technique, 3D LiDAR scan. LiDAR uses rays of laser beams to measure position data that produces a point cloud. The PZT technique gathers data collected by an actuator/sensor network generating and receiving signals across the interior of the plate using unique wave properties. Since wave properties can be correlated to structural elastic properties, they can used to detect condition changes. The integration of the two results allows validation of nondestructive damage detection and concurrent large deformation quantification. Preliminary test results on a 16 inches-by-16 inches aluminum plate subjected to five damage scenarios are presented to demonstrate the potential applications of such technique.
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© 2013 American Society of Civil Engineers.
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Published online: Jan 18, 2013
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Authors
Affiliations
Shen-En Chen
Dept. of Civil and Environmental Eng., UNCC, 9201 University City Boulevard, Charlotte, NC, 28223-0001 USA
Howard Chung
Accelent Technology, Sunnyvale, CA, USA
Youngjin Park
Dept. of Civil and Environmental Eng., UNCC, 9201 University City Boulevard, Charlotte, NC, 28223-0001 USA
Shannon Bell
Dept. of Civil and Environmental Eng., UNCC, 9201 University City Boulevard, Charlotte, NC, 28223-0001 USA
Alex Deaton
Depart. of Civil and Environmental Eng., UNCC, 9201 University City Boulevard, Charlotte, NC, 28223-0001 USA
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.