System and method for measuring and analyzing electrical signals on the shaft of a machine
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United States of America Patent
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Jul 18, 2000
Grant Date -
N/A
app pub date -
Apr 28, 1997
filing date -
Apr 28, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides a system and method for monitoring an electrical signal appearing on a rotating machine shaft. The system comprises a probe assembly for placement against the rotating machine shaft that is in electrically conductive contact with the shaft. The probe assembly includes at least one circuit for receiving the electrical signal from the rotating machine shaft and producing various electrical signals that are read by a data processing system, which is coupled to the circuit. The data processing system determines from the electrical signal obtained from the circuit, the RMS AC voltage, DC voltage, peak voltage, and the RMS AC and DC current through two different resisters that are all appearing on the rotating machine shaft. The data processing system also performs Fast Fourier Transforms on the RMS voltage and current signals and produces a frequency spectrum over time.
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