We are developing a high-speed laser measurement system of tunnel concrete wall with the purpose of automating the maintenance of civil infrastructures. For the automated diagnosis in a road tunnel, it is essential to realize remote measurement from the traveling vehicle so that measurement can implement without closing the tunnel. Although standards vary depending on the country, specifically, in Japan, the running speed of the vehicle is 30 km/h or more, and resolution capable of reliably detecting cracks with a width of 200 μm is required. A vehicle-mounted type tunnel measurement system with sufficient resolution has not been established. Various remote measurements based on LIDAR technology are expected to be useful for the tunnel measurement. However, it is difficult to achieve high resolution of 200 μm, due to the short exposure time associated with high-speed traveling. The spatial resolution of the existing vehicle-mounted measurement system is 1 mm in imaging, 5 cm in ranging [1].

© 2019 IEEE

PDF Article
More Like This
High spatial resolution LIDAR for detection of cracks on tunnel surfaces

Takeharu Murakami, Norihito Saito, Yuichi Komachi, Takashi Michikawa, Michio Sakashita, Shigeru Kogure, Kiwamu Kase, Satoshi Wada, and Katsumi Midorikawa
ATu3I.6 CLEO: Applications and Technology (CLEO_AT) 2018

First Field Trial of Sensing Vehicle Speed, Density, and Road Conditions by Using Fiber Carrying High Speed Data

Glenn A. Wellbrock, Tiejun J. Xia, Ming-Fang Huang, Yuheng Chen, Milad Salemi, Yue-Kai Huang, Philip Ji, Ezra Ip, and Ting Wang
Th4C.7 Optical Fiber Communication Conference (OFC) 2019

Noise Characteristic Analysis Technique for TDC-based LIDAR using High-resolution Eye-safe Low-SWaP LIDAR

Munhyun Han, Gyudong Choi, Hongseok Seo, Jeongdan Choi, and Bongki Mheen
JM5A.46 Advanced Solid State Lasers (ASSL) 2019


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription