Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1995-06-06
1997-03-25
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324204, 324674, 73 5307, 73 6142, 73 6172, 340631, 210695, 356 70, G01N 3328, G01N 2722, G01N 2100
Patent
active
056148305
ABSTRACT:
A method and apparatus for detecting the degree of deterioration in lubricating oil including a grid-like capacitive sensor, that uses the lubricating oil as a dielectric medium, and a magnetic field imposed upon the oil to attract ferromagnetic wear particles into the vicinity of the sensor. Preferably, the magnetic field is generated by a permanent magnet and an electromagnet aligned such that the magnetic field produced by each magnet acts upon the oil along the same axis. A plurality of capacitance measurements are taken at periodic intervals for one type of classification and analysis. Magnetically induced particle concentrations are analyzed visually under the aid of periodic magnetic flux reorientation and optical magnification.
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Dickert Arby D.
Hawn Keith A.
Johnson Eric L.
Kirkpatrick James F.
Brown Glenn W.
Computational Systems Inc.
Wieder Kenneth A.
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