| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete hammering inspection method for allowing even an inexperienced person to perform inspection easily, and capable of performing qualitative evaluation without any personal difference, and to provide a concrete hammering inspection apparatus. SOLUTION: The hammering sound of a concrete member is detected by an acoustic detection means, data are converted into digital waveform data by a data conversion means, and time/frequency analysis is made by a time/ frequency analysis means, thus calculating hammering analysis data (x, y, z) comprising hammering sound continuation time (x), hammering sound frequency (y), and hammering sound strength (z), discriminating the shape of a hammering sound curve obtained by plotting the hammering analysis data in a three- dimensional hammering analysis space, and hence evaluating the presence or absence, and the degree of the deterioration in the concrete member.
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