Ground Penetrating Radar (GPR)
Ground Penetrating Radar (GPR)
Ground Penetrating Radar (GPR)
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Ground</strong> <strong>Penetrating</strong> <strong>Radar</strong> (<strong>GPR</strong>) IET-<strong>Radar</strong> 2013<br />
Frequency Dependency<br />
Introduction of <strong>GPR</strong> Survey<br />
Time (ns)<br />
0<br />
20<br />
4<br />
0<br />
60<br />
• Selection of Frequency<br />
• Selection of Survey Lines<br />
• Accurate Antenna positioning<br />
• Combination of other methods (c.f. Electrical<br />
Survey)<br />
Time (ns)<br />
0<br />
20<br />
4<br />
0<br />
60<br />
Time (ns)<br />
0<br />
20<br />
4<br />
0<br />
60<br />
91<br />
• Try again<br />
• Understand the physical limitation<br />
92<br />
6. Advanced <strong>GPR</strong> techniques<br />
(Practice)<br />
•Detection of smaller objects<br />
•Nondestructive Testing<br />
(Research)<br />
•Quantitative Evaluation<br />
•Precise Measurement<br />
•4D(Time-Lapse)<br />
•Continuous Monitoring<br />
Tohoku University<br />
After 3.11 East Japan Earthquake<br />
93<br />
Earthquake and Tsunami<br />
Grand slide area in Arato-zawa<br />
North Japan<br />
• 2006 Banda Ache, Indonesia<br />
• 2008 Sichuan, China<br />
• 2008 Iwate-Miyagi, Japan<br />
• 2011 Christ Church, New Zealand,<br />
• 2011 East Japan<br />
• 2012 Bologna, Italy<br />
Motoyuki Sato (Tohoku University, Japan) 16
Change language