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METHOD AND DEVICE OF DIAGNOSING DAMAGE OF STRUCTURAL OBJECT

Foreign code F120007035
Posted date Nov 19, 2012
Country EPO
Application number 09710589
Gazette No. 2246695
Date of filing Feb 12, 2009
Gazette Date Nov 3, 2010
International application number WO2009JP52311
Date of international filing Feb 12, 2009
Priority data
  • P2008-032142 (Feb 13, 2008) JP
Title METHOD AND DEVICE OF DIAGNOSING DAMAGE OF STRUCTURAL OBJECT
Abstract

In the diagnosis of a structure, at least one electromechanical transducer is fixed to a structure as an object of diagnosis and is driven with an alternating voltage of a constant amplitude, and a current flowing through the at least one electromechanical transducer is measured. Next, high frequency components around a driving frequency of the electromechanical transducer are separated from a signal of the current. Next, modulation information due to a damage is extracted from amplitude and/or phase demodulation of the high frequency components. Then a damage index is evaluated based on the modulation information. Thus, structural health can be diagnosed with use of at least one electromechanical transducer, without baseline data, in one measurement.

  • Applicant
  • NATIONAL UNIVERSITY CORPORATION KYOTO INSTITUTE OF TECHNOLOGY
  • Inventor
  • MASUDA, ARATA
IPC(International Patent Classification)
U.S. Cl./(Sub)
  • G01M5/00M
  • G01M5/00P
  • G01N29/14
  • G01N29/42
  • G01N29/44B2
  • G01N29/44F
Specified countries AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HR,HU,IE,IS,IT,LI,LT,LU,LV,MC,MK,MT,NL,NO,PL,PT,RO,SE,SI,SK,TR
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