NONDESTRUCTIVE INSPECTION OF CONCRETE STRUCTURES USING LASER ULTRASONIC METHOD
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- AKAMATSU Shigenori
- Kochi National College of Technology
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- SEKINE Kazuyoshi
- Yokohama National University
Bibliographic Information
- Other Title
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- レーザー超音波法によるコンクリート構造物の非破壊検査
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Abstract
In this paper, we present experimental results of an investigation of the relation between ultrasonic waveforms excited by a Q-switched pulse laser at 1064, 532, and 355 nm. As a result the 355 nm wavelength source proved best because it provides stronger impact and is most suitable for generating P-waves. Using a 532 nm source did not provide proper impact for concrete. We inspected an artificial defect in a concrete specimen using 1064 and 355 nm wavelengths of the pulse laser. The peak in opposite phase with the transmitted P-wave is used to estimate the distance of the flaw. Using the 355 nm pulse laser the result was in good agreement with the true value of the distance of the artificial defect from the specimen surface.
Journal
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- Journal of High Pressure Institute of Japan
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Journal of High Pressure Institute of Japan 44 (6), 322-330, 2006
HIGH PRESSURE INSTITUTE OF JAPN(HPI)
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Keywords
Details 詳細情報について
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- CRID
- 1390282679592390272
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- NII Article ID
- 10018654498
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- NII Book ID
- AN00011762
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- ISSN
- 13479598
- 03870154
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- NDL BIB ID
- 8602329
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed