| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
In this paper, novel approaches for estimating the defect shapes in piping using the defect signals of the guided waves were presented. To accomplish the aim of the research, minute observations of the propagation phenomena of the guided waves were carried out. The four approaches were as follows: (1) validation of the mathematical model of reflection at axisymmetric defects and novel method for estimation the defect shape, (2) verification of resonant phenomena of circumferential SH wave at non-axisymmetric defect and its application, (3) new method for narrowing the dead zone in the guided-wave-sensor, (4) suggestion for the efficient defect detection at an elbow part.
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