Magnetic flux leakage probe with radially offset coils for use i

Details Magnetic flux leakage probe with radially offset coils for use i Magnetic flux leakage probe with radially offset coils for use i

1986-10-31

1988-12-06

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324228, 324242, G01N 2787

Patent

active

047898275

ABSTRACT:
A magnetic flux detection probe for use in nondestructive testing of tubular products includes first and second flux leakage sensing coils mounted within a probe housing and radially offset with respect to each other to provide improved detection of defect locations and magnitudes. In a preferred embodiment a Hall effect sensing device is provided in the probe to sense variations in wall thickness of a tubular product while the flux leakage coils identify sharp responses of cracks and pits in the wall structure.

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