METAL PLATE FLAW DETECTING PROBE

摘要

PROBLEM TO BE SOLVED: To provide a metal plate flaw detecting probe widening a detection area for easily detecting a flaw over a wide range on the front and back faces and in the inside of a metal plate. SOLUTION: This flaw detecting probe 10 performing scanning along the surface of the metal plate 30 as a specimen is constructed so as to include a primary coil 12 and a pair of secondary coils 13, 14. As to a thin long coil former 11 arranged parallelly to the surface of the metal plate, the primary coil 12 is wound on a face facing the metal plate surface and on a face on the opposite side in the longitudinal direction so as to be excited by exciting current at a predetermined frequency. Between the metal plate surface and the primary coil, the secondary coils 13, 14 are wound around a shaft vertical to the metal plate surface adjacently to each other so as to be extended in the longitudinal direction of the primary coil and differentially connected to each other.