Overall Introduction
OERL?
The technology thrust of the OERL is the development and implementation to real-world of various structural sensing technology. The novel developments are achieved based on the multidisciplinary areas of optics, electronics, mechatronics and signal processing for the fields of laser and optics in engineering, integrated integrity management, fiber optic, noncontact and wireless sensing, advanced nondestructive evaluation and measurement, pyroshock measurement and simulation. The application fields encompass Smart Hangar, space launchers, unmanned air vehicles, wind turbines, power plants, railway structures and public safety.
About Supervisor
Prof. Jung-Ryul Lee
Director, Korea Society of Composite Materials
Editorial board member, Korea Society of Nondestructive Testing
Editorial board member, Korea Society of Aeronautical and Space Science Magazine
Achievements
171 of international & domestic journal papers (including 138 of SCI(E))
357 of international & domestic conference papers
29 of international, US, Japan and Korea patents
Research field
Nondestructive Evaluation
PZT-Ultrasonic Propagation Imaging System
Nondestructive damage inspection system using laser ultrasonic wave propagation and PZT sensors
High speed (Max. 20 kHz pulse repetition rate)
Distance: over 100 m
Visualize ultrasonic wave propagation
Combine with wireless network
Laser Doppler Vibrometer-Ultrasonic Propagation Imaging System
Fully noncontact, nondestructive damage inspection system using Laser Doppler Vibrometer
High speed (Max. 20 kHz pulse repetition rate)
Measurable for extraordinarily long-range and curved surface
Mobile Pulse-Echo Ultrasonic Propagation Imaging System
Mobile PE UPI system aims to provide mobility by compact size as well as high-resolution inspection result.
Fully noncontact nondestructive inspection system using generation and sensing lasers as an in-situ NDE tool
Inspection for through-the-thickness defects such as delamination and disband
Pulse-echo ultrasonic wave propagation imaging (PE UWPI) for damage visualization
Achievements
Structural Health Monitoring
Smart Hangar
Invented in 2008, first in the world
Fast and long range laser ultrasonic scanning
Simultaneous multi-area scanning
Fast signal processing for the big data
Single Channel PZT Sensor Network
Serial-connected three PZT sensors in fuselage
Surface crack detection from a distance (NDE)
Impact localization using pre-trained UPI data (SHM)
Smart UAV and Haptic Interface for ground pilot
Lasers in Engineering
Pyroshock Measurement & Visualization
< Usage of pyrotechnique devices in space launchers >
< Laser pyroshock measurement system >
Microwave Imaging
Electromagnetic properties evaluation using free space measurement
Reflection & transmission loss (S_11, S_21)
Permittivity & permeability (ε′, ε′′, μ′, μ′′)
Loss tangent (tanδε, tanδμ)
Radar absorbing structure for microwave absorber
Artificial Intelligence
Visual inspection base Machine-Learning
A vision-based system for a damage detection
Automatic classification of damage
Convolutional neural network (CNN))