Damage detection apparatus and method for a conveyor belt having

Details Damage detection apparatus and method for a conveyor belt having Damage detection apparatus and method for a conveyor belt having

1992-09-30

1995-06-20

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324242, 340676, G01N 2782, G01R 3312

Patent

active

054263620

ABSTRACT:
An apparatus to detect damage in the metallic magnetically permeable reinforcing cables in a conveyor belt. The apparatus includes a field coil to generate a magnetic field passing through the cables, and Hall effect sensors to detect change in reluctance in the field adjacent to the conveyor belt. The conveyor belt is moved relative to the apparatus so that when there is a damaged area, this will change the reluctance path, which changes the field intensity and is in turn detected by the Hall effect sensors.

REFERENCES:
patent: 3694740 (1972-09-01), Bergstrand
patent: 3834524 (1974-09-01), Ratz et al.
patent: 4087800 (1978-05-01), Lee
patent: 4427940 (1984-01-01), Hirama et al.
patent: 4660018 (1987-04-01), Hatch
patent: 4742298 (1988-05-01), Ando et al.
patent: 4914376 (1990-04-01), Meyer
patent: 5146163 (1992-09-01), Nawa
Yasutaka Maekawa, Japanese Patent 57-204450, Detecting Method for Rock Mixed in Coal, Dec. 1982.

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