Establishment of Reduction Method of Background Reflection on IR Thermographic Test for Whole Wall Area

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420603
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群)
• Principal Investigator: OGASAWARA NAGAHISA 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工, システム工学群, 教授 (60262408)
• Co-Investigator(Kenkyū-buntansha): YAMADA Hiroyuki 防衛大学校, システム工学群, 准教授 (80582907)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 保全技術 / 赤外線サーモグラフィ / 分光放射特性 / 角度依存性 / 反射

Outline of Final Research Achievements

In this study, we established a reduction method of background reflection from sunshine or other structures on IR thermographic test for buildings and structures. It is very important to know the spectral emissivity of test material accurately, so that we first developed a measurement technique of spectral emissivity using a Fourier Transformation Infrared Spectrometer (FT-IR) and a infrared thermographic instrument. Next, two experiments using FT-IR and IR thermographic instrument showed that the apparent roughness has an angle dependency and that it changes the spectral emissivity. The theoretical emissivity is effective when the apparent roughness is very small. Then we developed the MATLAB program for the reduction of background reflection. This program can reduce the reflection effect and make the accurate thermal image.

Free Research Field

工学