Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1992-01-31
1994-03-22
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324 67, 3242072, 324326, G01R 3306, G01B 714, G01V 3165
Patent
active
052968073
ABSTRACT:
An apparatus for locating magnetizable material (5, 6) within a structure (4) includes a scanning head (1) with a permanent magnet (28) for producing a magnetic field in the structure (4). Two field plates (30, 31), adjacent one another on only one pole face of the permanent magnet (28), are interconnected by a differential circuit and measure the magnetic field of the magnet disturbed by the magnetizable material (5, 6). The differential values measured by the pair of field plates form a differential measured signal for establishing, after differentiation, the location of the magnetizable material (5, 6) within the structure (4). The location of the magnetizable material (5, 6) within the structure can be shown on a monitor (7) of an evaluation unit (3).
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Ganahl Otmar
Kousek Heinz
Leemann Hans
Nipp Hansjorg
Noser Otto
Edmonds Warren S.
Hilti Aktiengesellschaft
Strecker Gerard R.
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