Abstract
Infrastructures constructed in Japan are estimated to age rapidly in the future. Hence, a method to efficiently inspect the infrastructures is needed. The purpose of this study is to verify that it is possible to detect the void near surface and flaking in the subway tunnel lining by the infrared thermography camera. At first, we acquire the data by infrared measurement system while moving. Next, we extract the void near surface and flaking by analyzing the infrared measurement. We have confirmed the efficacy of our proposed technique compared to conventional tapping sound investigation method. Furthermore, in the present study, we have been able to capture a very small temperature difference of even 0.05 degree centigrade.
