Monitoring of elongate magnetically permeable members

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

1980-10-08

1984-03-27

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324243, G01N 2782, G01R 3312

Patent

active

044397313

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 magnetically 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.

REFERENCES:
patent: 2467306 (1949-04-01), Habig
patent: 2582437 (1952-01-01), Jezewski et al.
patent: 3444458 (1969-05-01), Scott
patent: 3792459 (1974-02-01), Snyder
patent: 4258319 (1981-03-01), Shimada et al.

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