Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1994-07-12
1996-12-31
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
505842, G01N 2782, G01C 2108
Patent
active
055897720
ABSTRACT:
A non-destructive testing equipment comprises a magnetic field generator for generating a uniform magnetic field, and a magnetic sensor accommodated in a thermal insulation container and filled with a liquid nitrogen. The thermal insulation container is located within a magnetic shield container having an opening. The magnetic sensor includes a SQUID that is a magnetic sensor having very high sensitivity. The magnetic sensor can detect, through the opening, an appreciable variation of the magnetic field that is caused by small impurities or minor defects contained in the object to be tested.
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Kerins John C.
O'Shea Sandra L.
Phillips Roger
Sumitomo Electric Industries Ltd.
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