Apparatus and method including flux injector pole position senso

Details Apparatus and method including flux injector pole position senso Apparatus and method including flux injector pole position senso

1992-06-18

1993-09-14

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With compensation for test variable

32420726, 324227, 324235, 324262, G01N 2783, G01R 3312

Patent

active

052452794

ABSTRACT:
A direct-current electromagnetic device for nondestructively detecting localized discontinuities in ferromagnetic objects is disclosed. The device comprises an adjustable dc excitor means, a magnetic flux injector means, an external magnetic field detector means, a plurality of position sensors, a signal processing means and a control means. It is particularly adapted for detecting flaws in soiled and distorted ferromagnetic objects such as water wall tubes in industrial boilers. An apparatus incorporating the device and a method of detecting discontinuities are also disclosed.

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