1992 Fiscal Year Final Research Report Summary
Inspection Method of Cracks in Concrete by Using Infrared Camera
| Project/Area Number |
03452202
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
コンクリート工学・土木材料・施工
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
IDEMITSU Takashi Kyushu Institute of Technology, Civil, Associate Professor, 工学部, 助教授 (30039078)
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| Co-Investigator(Kenkyū-buntansha) |
YAMASAKI Takehiro Kyushu Institute of Technology, Civil, Associate Professor, 工学部, 助教授 (10098783)
WATANABE Akira Kyushu Institute of Technology, Civil, Professor, 工学部, 教授 (90039066)
TAKAYAMA Shun-ichi Kyushu Kyoritsu University, Civil, Assosiate Professor (50039137)
MATSUMOYO Susumu Kagoshima University, Civil, Professor (00041567)
HARADA Tetsuo Nagasaki University, Civil, Assosiate Professor (50136636)
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| Project Period (FY) |
1991 – 1992
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| Keywords | Infrared Camera / Inspection Method / Crack / Heat Conduction / Remote control / Reflection Method / Infrared Heater |
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| Research Abstract |
It is very immportant to establish the inspection method of cracks in concrete structure. In order to investigate the inspection method by remote control, the following study was carried out in this paper.
(1) A small part of the concrete specimen was heated with an improved soldering copper and by using the infrared camera the heat conduction behavior was recorded. the position of cracks could be found by checking up the disturbance of heat distribution.
(2) Infrared rays were applied to the specimen with the infrared heater and the reflected rays from the crack sueface were measured by the infrared cameta. The cracks can be seen in the heat distribution photograph, since the infrared rays do not reflect at the cracks. As the result of the tests, the small cracks 0.2mm in width could be recorded, under the condition when the distance from the infrared camera to the specimen was 6.0-10m
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