1995 Fiscal Year Final Research Report Summary
DEVELOPMENTAL STUDY ON REMOTE-SENSING DIAGBOSIS METHOD ON DETRIORATION BEHAVIOR IN CIVIL STRUCTURES
| Project/Area Number |
05555118
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
土木材料・力学一般
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| Research Institution | IBARAKI UNIVERSITY |
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Principal Investigator |
OKAMOTO Yoshizo IBARAKI UNIVERSITY DIV.OF ENGNG.PROFESSOR, 工学部, 教授 (10194408)
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| Co-Investigator(Kenkyū-buntansha) |
KUROKAWA Katashi NEC・SANSEI SECOND TECHNOLOGY DIV.CONTROL MANAGER, 三栄・第二技術本部, 部長
ISHII Toshimitsu JAERI DIV.OF HIGH-TEMP.ENGNG.RESEARCHER, 高温工学部, 研究員
ETO Motokuni JSERI DIV.OF HIGH-TEMP.ENGNG.RES.DIRECTOR, 高温工学部, 室長
INAGAKI Terumi IBARAKI UNIVERSITY DIV.OF ENGNG.RES.ASSOCIATE, 工学部, 助手 (90184712)
NUMAO Tatsuya IBARAKI UNIVERSITY DIV.OF ENGNG.AS.PROFESSOR, 工学部, 助教授 (90164649)
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| Project Period (FY) |
1993 – 1995
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| Keywords | deteriorated elements / infrared radiometer / sun / lamp / radiation temperature / flaw / abnormal temperature / radiation heater / transient temperature / radiation heter / buried project |
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| Research Abstract |
In order to detect the location of deteriorated elements of the civil engineering stucture like concrete, tile, brick and covered plate, a new radiation thermal test using an infrared radiomenter was undertaken. In this study, several incedent heat energy was inected to the surface of the tested element with external abd internal dlaws such as sun, lamp, hot gas, indirect radiation combustion. The transient radiation surface temperature above the flaws was displayd on the CRT of the infrared radiometer. A observed image of the radiation temperature image above the flaw shows the existance of the flaw.
We manufactured a high temperature radiation heater which radiates the heat of 20 kw to the surface of the structural element with several flaws. The test piece was indirectly heated by the radiation heater. The abnormal temperature distribution above the flaw was observed by the infrared radiometer. It was succeeded to detect the underground buried project of 30 cm in depth embedded in the earth using the radiation heater.
As the application study, the method was successfully applied to detect the ancient house, dwelling pit, crack and seperation of the concrete structure.
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