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Journal of Applied Remote Sensing • Open Access • new

Demonstration of 25-Hz-inspection-speed laser remote sensing for internal concrete defects
Author(s): Shinri Kurahashi; Katsuhiro Mikami; Toshiyuki Kitamura; Noboru Hasegawa; Hajime Okada; Shuji Kondo; Masaharu Nishikino; Tetsuya Kawachi; Yoshinori Shimada

Paper Abstract

High-speed laser remote sensing of defects inside a concrete specimen was demonstrated. In the proposed measurement setup, high-power laser pulses irradiated a concrete surface to generate vibration that can be detected by an optical interferometer, which was constructed using photorefractive crystal. The laser-based remote sensing system achieved inspection speeds of 25 Hz. The predominant frequency of a mock-up defect that was embedded in a concrete specimen was measured. The inspection result was identical to that obtained using a conventional hammering method.

Paper Details

Date Published: 9 February 2018
PDF: 10 pages
J. Appl. Rem. Sens. 12(1) 015009 doi: 10.1117/1.JRS.12.015009
Published in: Journal of Applied Remote Sensing Volume 12, Issue 1
Show Author Affiliations
Shinri Kurahashi, Institute for Laser Technology (Japan)
Katsuhiro Mikami, National Institutes for Quantum and Radiological Science and Technology (Japan)
Toshiyuki Kitamura, Institute for Laser Technology (Japan)
National Institutes for Quantum and Radiological Science and Technology (Japan)
Noboru Hasegawa, National Institutes for Quantum and Radiological Science and Technology (Japan)
Hajime Okada, National Institutes for Quantum and Radiological Science and Technology (Japan)
Shuji Kondo, National Institutes for Quantum and Radiological Science and Technology (Japan)
Masaharu Nishikino, National Institutes for Quantum and Radiological Science and Technology (Japan)
Tetsuya Kawachi, National Institutes for Quantum and Radiological Science and Technology (Japan)
Yoshinori Shimada, Institute for Laser Technology (Japan)


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