DEVICE FOR EVALUATING SOUNDNESS OF STRUCTURE AND METHOD FOR EVALUATING SOUNDNESS OF STRUCTURE USING THE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a device for evaluating the soundness of a structure which performs quantitative evaluation of a minute damage about the structure and a method for evaluating the soundness of the structure using the device. SOLUTION: In this method for evaluating the soundness of the structure which evaluates the damage of the structure by continuously observing the change in electric impedance generated in a piezoelectric element 20 which is attached on the structure 10 while generating a high frequency elastic wave in the structure 10 by applying a voltage to the piezoelectric element 20, the electric impedance is continuously observed by using the damage evaluating index of peak frequency shift quantityΔF, peak amplitude ratio change rateδand Q value ratio change rateγ. COPYRIGHT: (C)2004,JPO