Rotating eddy current roller head for inspecting and profiling t

Details Rotating eddy current roller head for inspecting and profiling t Rotating eddy current roller head for inspecting and profiling t

1991-03-19

1992-07-28

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324262, G01N 2790

Patent

active

051343673

ABSTRACT:
A rotating cross wound eddy current head for inspecting tubing. A main body portion has a coil mounting arm pivotally mounted in a bore on the main body portion that allows for radial movement of the arm. A cross wound eddy current coil is mounted adjacent the opposite end of the arm from the pivotal mounting point. Opposing magnets mounted in the main body portion and coil mounting arm bias the arm and coil radially outward so that the coil tracks the surface of the tube being inspected and only reads one point on the tube. A helical inspection path is provided by moving the head axially through the tube while simultaneously rotating the head.

REFERENCES:
patent: 3611120 (1971-10-01), Forster
patent: 4625165 (1986-11-01), Rothstein
patent: 4937524 (1990-06-01), Fasnacht

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