| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cavity part detection system of a concrete body and a cavity part detection method of a concrete body which are capable of accurately detecting cavity parts that exist inside the concrete body.SOLUTION: A cavity part detection system 1 of a concrete body 10 comprises: electrodes 3a,3b arranged side by side so as to contact a surface of the concrete body 10 or sandwich a soft isolation layer therebetween; a parallel capacitor 4 parallelly connected to the electrodes 3a,3b; a series resonant circuit which is constituted by including a resonance coil 2 serially connected to the electrodes 3a,3b and the parallel capacitor 4; a LCR meter 5 which changes positions of the electrodes 3a,3b to the concrete body 10 while flowing current to the series resonant circuit at frequency where the series resonant circuit is serially resonates and measures a phase angle of impedance of the series resonant circuit at each position; and an arithmetic unit 6 which determines presence/absence of cavity parts based on the phase angle measured by the LCR meter 5.</p> |
