量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum and Radiological Science and Technology.
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We have developed a new high-speed laser remote sensing system for detection of the defects in the lining concrete of tunnels. The laser hammering system (LHS) has same measurement principle as the conventional hammering test, and it consists of the hammering laser as a hammer, laser vibrometer as an inspector's ear, and high speed scanning system. The advantages of LHS are remote sensing (> 5m), high-speed measurement (up to 50 Hz), and digital recording. Inspection in road tunnels is demonstrated by LHS mounted on 4t loading vehicle, and we have succeeded in detecting defects in the lining concrete of tunnels and the result was consistent with conventional hammering test. The inspection results can be data-linked to the tunnel surface imaging system, MIMM (Mobile Imaging Technology & Mobile Mapping System). By using the total inspection system combined LHS and MIMM, the efficiency of the maintenance of the tunnels will be significantly improved.
雑誌名
ITA-AITES World Tunnel Congress, WTC2020 and 46th General Assembly Kuala Lumpur, Malaysia 11-17 September 2020
Demonstration of High-Speed Laser Hammering System for the Lining Concrete Inspection
