Monitoring of elongate magnetically permeable members

Details Monitoring of elongate magnetically permeable members Monitoring of elongate magnetically permeable members

G - Physics

08

B

340/123.6

G08B 1/08 (2006.01)

Patent

CA 1161514

ABSTRACT The present invention discloses both a method and apparatus whereby the integrity of elongate magnetically permeable member(s) can be determined even if coated with a non-magnetic substance or embedded in a non-magnetic body. A magnetic yoke having field winding(s) and sensing winding(s) is used to induce a time varying magnetic field in the mag- netically permeable member(s). Changes in the reluctance experienced by this magnetic field alter the output of the sensing winding(s). The invention finds particular application to testing conveyor belts, but is also applicable to steel cables, and both rubber and concrete bodies, including steel reinforcing.

362326

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