Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1996-11-29
1998-09-08
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324227, 324235, G01N 2782, G01N 2783, G01R 3312
Patent
active
058049649
ABSTRACT:
A magnetic testing device for obtaining a damaged index of an elongated magnetically-permeable object in real time includes a permanent magnet assembly with spaced-apart poles, a tubular pole piece adapted to surround the object, Hall effect devices placed in the magnetic flux path, a leakage flux sensor installed between the pole pieces, and a real time signal processing unit. The signal processing unit provides local fault (LF) signals generated by the leakage flux sensor, and loss of metallic area (LMA) signals generated by the Hall effect devices. The standard deviations of the LF signals are summed, the root-mean-square of the LF signals is summed, the absolute values of the LF signals are integrated, and the LMA signal is multiplied by a coefficient which is dependent on the object construction. The damage index is then determined using the thus-calculated values. Preferably, when a wire rope is passed through the monitoring device, the damage index is given to the user in a hand-held display means. Preferably, no interpretation is required by the user.
REFERENCES:
patent: 4096437 (1978-06-01), Kitzinger et al.
patent: 4445088 (1984-04-01), Schubel
patent: 4495465 (1985-01-01), Tomiauolo et al.
patent: 5036277 (1991-07-01), van der Walt
patent: 5402066 (1995-03-01), Hickman, Jr. et al.
patent: 5414353 (1995-05-01), Weischedel
patent: 5565771 (1996-10-01), Hamelin et al.
Weischedel H.R., Mining Science and Technology, 1990, 11, 85-93.
Kuun et al., "Condition assessment of winding ropes", presented at the 2nd International Conference on Mine Hoising, London, England, Jun. 28-30 1993 .
Hamelin Michel
Kitzinger Frank
Noranda Inc.
Strecker Gerard R.
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