Sectional magnetic encoding method and system for measuring rotating shaft parameters
AssigneeGeneral Electric Company
InventorsChristof Martin Sihler, Thomas Alois Zöls, James William Bray, Klaus Franz Otto Raum
Life of this patent
Estimating the term…
Abstract
A method for non-contact measurement of multiple shaft parameters is provided. The method includes magnetically encoding multiple sections of the shaft using pulsed currents. The method also includes sensing a magnetic field of the encoded sections of the shaft using multiple sensors arranged circumferentially about the shaft. Further, the method includes generating a spectrum of periodical variations based on sensed magnetic field of the encoded sections of the shaft during rotation and determining multiple parameters based on recurrences of patterns of the spectra.
Claims20
A method for non-contact measurement of a plurality of shaft parameters, comprising:
- magnetically encoding a plurality of sections of the shaft using pulsed currents;
- sensing a magnetic field of the encoded sections of the shaft using a plurality of sensors arranged circumferentially about the shaft;
- generating a spectrum of periodical variations based on sensed magnetic field of the encoded sections of the shaft during rotation;
- and
- determining a plurality of parameters based on recurrences of patterns of the spectrum.
A system for measuring a plurality of operating parameters of a shaft, comprising:
- a plurality of magnetic encoded regions circumferentially disposed about a shaft;
- one or more sensors proximate to said shaft and at least some of the encoded regions, wherein said sensors enable measurements of magnetic field properties of the encoded regions;
- and
- a processor for processing said magnetic field properties and computing shaft parameters.
A method for encoding a shaft, comprising:
- disposing at least one conducting member in close proximity about a section of said shaft, said conducting member having a first end and a second end;
- disposing electrodes onto said shaft proximate the first end and the second end, wherein said electrode is coupled to said second end of said conducting member;
- electrically coupling said first end electrode to a current source and coupling said current source to said first end of said conducting member;
- and
- applying unipolar current pulses to said conducting members thereby inducing sectional encoding regions.
Dependencies are inferred from the claim text.