抄録
This article introduces a remote laser inspection system that detects cracks on the concrete wall of
tunnels. The system consists of three features: distance measurement using an interferometer equipped
with a frequency-shifted feedback (FSF) laser, high-speed and high-resolution imaging using a reflected
light imaging system, and spectroscopic imaging using triple lasers with different wavelengths. The
features have potential to replace conventional manual-based inspection tasks.
