@article{oai:repo.qst.go.jp:00082686,
 author = {長谷川, 登 and 錦野, 将元 and 岡田, 大 and 近藤, 修司 and 北村, 俊幸 and 木暮, 繁 and 安部, 正道 and 舛添, 和久 and Noboru, Hasegawa and Masaharu, Nishikino and Hajime, Okada and Shuji, Kondo and Toshiyuki, Kitamura and Kogure, Shigeru and Abe, Masamichi and Masuzoe, Kazuhisa},
 journal = {ITA-AITES World Tunnel Congress, WTC2020 and 46th General Assembly Kuala Lumpur, Malaysia 11-17 September 2020},
 month = {Sep},
 note = {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.},
 pages = {653--656},
 title = {Demonstration of High-Speed Laser Hammering System for the Lining Concrete Inspection},
 volume = {46},
 year = {2020}
}