REINFORCING BAR CORROSION INSPECTION METHOD AND REINFORCING BAR CORROSION INSPECTION APPARATUS

摘要

PROBLEM TO BE SOLVED: To obtain a highly stable inspection result by reducing the influence of an individual difference between members and variations in the equipment arrangement of an inspection apparatus when inspecting the degree of corrosion of a reinforcing bar included in a reinforced concrete member by an eddy current method. SOLUTION: An AC current having a plurality of frequencies is supplied to a differential coil composed of a first coil 3 wound around the reinforced concrete member 10 and a second coil 4 wound around a prescribed reference member 20. The difference level of the impedance of the first coil to the difference in the frequency of an AC current supplied to the first coil 3 is detected as an index value indicating the degree of corrosion of a reinforcing bar 12. COPYRIGHT: (C)2010,JPO&INPIT