| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
This study aimed at the development of a nondestructive testing method using microwave for the long-range inspection of corrosions under insulations. Three-dimensional finite element simulations were conducted, whose results revealed that situating coaxial cables carrying TEM microwave circumferentially with an equal distance enables to convert TEM microwave propagating inside the coaxial cables into another TEM microwave propagating inside insulators. Subsequent experimental verifications were performed using a eight-way power divider and double pipes with artificial grooves simulating a corrosion under insulation. The experiment confirmed a clear signals due to the artificial grooves, and the time-of-flight of the signals agreed well with the actual location of the artificial grooves.
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