| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for measuring original waveform of elastic wave capable of accurately measuring and analyzing the original waveform of a minute elastic wave. SOLUTION: A reference object is collided to a predetermined position of a measuring object in a condition such that a minimum point of frequency area of power spectrum of the original waveform of a reference elastic wave generated by this collision is located in a desired frequency, and a response function of a propagation system is determined by use of the original waveform of the reference elastic wave generated by the collision and a measured waveform of the reference elastic wave obtained by measuring the original waveform of the reference elastic wave through the propagation system. The original waveform of a minute elastic wave generated by applying a minute impact force to the predetermined position of the measuring object is determined by use of a measured waveform of the minute elastic wave obtained by measuring the original waveform of the minute elastic wave through the propagation system and the response function. COPYRIGHT: (C)2006,JPO&NCIPI
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