Apparatus and method of damage detection for magnetically permea

Details Apparatus and method of damage detection for magnetically permea Apparatus and method of damage detection for magnetically permea

1992-09-30

1996-10-29

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324235, 324238, 324242, G01N 2772, G01R 3312

Patent

active

055700179

ABSTRACT:
An apparatus to detect anomalies in a member, such as a conveyor belt, having reinforcing cables therein made of a magnetically permeable material. There is coil means arranged to create a magnetic field as two longitudinally spaced first and second field components at longitudinally spaced locations. There are Hall effect sensors arranged to respond to modifications in each of the first and second field components. In a first embodiment, there is one set of sensors positioned between the first and second field components. In a second embodiment, there are two sets of sensors spaced at said first and second field components.

REFERENCES:
patent: 4427940 (1984-01-01), Hirama et al.
patent: 4742298 (1988-05-01), Ando et al.
patent: 4827215 (1989-05-01), Vanderwolf

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