Though the coin-tap test seems very simple, its
response varies vastly according to the structure excitation
extent. Physically complex questions remain to be satisfactorily
answered, for example, how “locally” the impact
should be applied and the measurements taken, what is the
relationship between impulse magnitude and the resulting
sound amplitude and spectrum composition, etc. In this
paper, we begin our investigation with impact analysis,
then look into hammer acceleration data and sound data,
trying to build up a sensor fusion paradigm to improve the
coin-tap NDT technology.
Though the coin-tap test seems very simple, itsresponse varies vastly according to the structure excitationextent. Physically complex questions remain to be satisfactorilyanswered, for example, how “locally” the impactshould be applied and the measurements taken, what is therelationship between impulse magnitude and the resultingsound amplitude and spectrum composition, etc. In thispaper, we begin our investigation with impact analysis,then look into hammer acceleration data and sound data,trying to build up a sensor fusion paradigm to improve thecoin-tap NDT technology.
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