Rotating eddy current roller head

Details Rotating eddy current roller head Rotating eddy current roller head

G - Physics

01

N

324/50

G01N 27/90 (2006.01)

Patent

CA 2006325

ABSTRACT OF THE DISCLOSURE A rotating eddy current roller head for inspecting tubing. A main body portion has a set of whisker wheels rotatably attached thereto which center the main body portion in the tube. A roller housing slidably mounted on the main body portion for radial movement relative thereto is caused to track the surface of the tube by opposing magnets mounted in the main body portion and roller housing. An eddy current coil is mounted in a coil holder which is pivotally mounted in an offset manner at the exterior end of the roller housing. A spring mounted in the roller housing biases the trailing edge of the coil holder against the surface of the tube to maintain the eddy current coil at a constant distance from the surface of the tube during inspection procedures.

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