| Project/Area Number |
04650048
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
応用物理学一般(含航海学)
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
TAKAUE Ryoichi Kyushu Institute of Technology, Department of Engineering, Research Associate, 工学部, 助手 (70142354)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUNAGA Morio Kyushu Institute of Technology, Department of Engineering, Associate Professor, 工学部, 助教授 (50117313)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | tomography / thermal wave / photopyroelectric effect / subsurface defect / nondestructive testing |
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| Research Abstract |
Thermal wave tomographic imaging of an aluminum sample with a new photopyroelectric detector is reported. The new detector can detect the local ac temperature field when it comes into contact with the back surface of a sample. Compared to the capacitively coupled detector, this detector is easier to handle and has increased sensitivity to the photopyroelectric signal. The effects of the laser beam modulation frequency and subsurface defects in the sample on the tomographic image have also been studied. It is revealed that the resolution of the tomograph increases with increasing modulation frequency and decreasing metal-tip diameter of the detector.
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