| 摘要 |
PROBLEM TO BE SOLVED: To provide a apparatus for detecting noncontact-type magnetic substance without interferences between adjacent cores, even if a plurality of cores are arranged adjacently, which detects the distribution of magnetic substances with high accuracy. SOLUTION: A pair of cores 2, 3 are made to face each other with respective one ends, having a predetermined gap G via a conveyor line that a medium 10 to be detected passes through. Coils 4a, 4b wound at opposed portions of the cores 2, 3, are connected in series to form a first coil 100, and coils 5a, 5b coiled on opposed sides of the facing portions are connected in series to form a second coil 200. Respective coils 6, 7 wound at intermediate portions of respective cores are connected in series, to form a third coil 300. A signal processing circuit is provided for processing the detected signal from the first coil and the detected signal from the second coil through AC energization of the third coil. COPYRIGHT: (C)2005,JPO&NCIPI |
