Applicability in Cepstrum Analysis Using Giant-Magnetostriction Vibrator Applied to Non-destructive Testing of Concrete Construction and Rock Slope

• KAWAMURA Youhei

  Graduate School of Systems and Information Engineering, University of Tsukuba

• ASAKA Michinori

  Graduate School of Systems and Information Engineering, University of Tsukuba

• KO Takanari

  Graduate School of Systems and Information Engineering, University of Tsukuba

• OKAWA Hirokazu

  Akita University

• MIZUTANI Koichi

  Graduate School of Systems and Information Engineering, University of Tsukuba

Bibliographic Information

Other Title

• 超磁歪振動子を用いたコンクリート構造物・岩盤斜面に対する非破壊検査におけるケプストラム解析の適用性
• チョウジワイ シンドウシ オ モチイタ コンクリート コウゾウブツ ガンバン シャメン ニ タイスル ヒハカイ ケンサ ニ オケル ケプストラム カイセキ ノ テキヨウセイ

Abstract

Buildings are often damaged by earthquake and land sinkage. Moreover, in Japan, concrete constructions built during the period of high economic growth are getting old. On the other hand, due to weather and geographical features, the collapse of rock slope occurs in many places. So, authors have been conducting a study of the safety assessment of concrete constructions and rock slope using reflection wave method. In this study, the giant-magnetostriction vibrator was used as a transducer to input the ultrasonic wave into a concrete block. Giant-magnetostriction vibrators have much greater input power than piezo-electric ceramics. So, the safety assessment of large scale objects that do not respond with piezo-electric ceramics is possible. These researches are generally called "Non-destructive testing" and herculean task due to the influence of direct wave, because the output wave contains a wave with direct wave and reflection wave together. In this study, as the method to detect the reflection wave, cepstrum analysis was adopted, and arrival times of reflection waves from the bottom of concrete block are shown. The result of cepstrum analysis is greatly influenced by the noise. To improve the result of analysis, the window function which is used in the process of cepustrum analysis was focused, and reduced the influence of direct wave using input voltage waveform. Moreover, the addition of the results of cepstrum analyses in different frequency was applied and the result was greatly improved. The result of this research shows that the cepstrum analysis with giant-magnetostriction vibrator for non-destructive testing is available.

Journal

• Journal of MMIJ

  Journal of MMIJ 124 (6/7), 452-458, 2008

  The Mining and Materials Processing Institute of Japan

Keywords

• Non-Destructive Testing
• Giant-Magnetostriction Vibrator
• Reflection Wave Method
• Cepstrum Analysis
• Ultrasonic

Details

• CRID: 1390282680252420864
• NII Article ID: 10024264432
• NII Book ID: AA12188381
• DOI: 10.2473/journalofmmij.124.452
• ISSN: 18840450
• ISSN: 18816118
• NDL BIB ID: 9595393
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9595393
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed