| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic flaw detection sensor capable of reducing furthermore than hitherto an influence of a noise generated by fine vibration of a sensor head. SOLUTION: This sensor is acquired by improving a magnetic flaw detection sensor formed from a ferromagnetic material core and a search coil wound thereon which are used for detection of a magnetic flux leaking from a defect existing on a magnetized inspection material arranged between magnetic poles of a magnet disposed along a running line of the inspection material. The sensor is equipped with a plurality of bar-shaped ferromagnetic material cores mutually separately at fixed intervals in the running direction of the inspection material, and the search coil is wound on each pair of adjacent bar-shaped ferromagnetic material cores by differential connection. COPYRIGHT: (C)2005,JPO&NCIPI
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