Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-04-25
2006-04-25
Patidar, Jay (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S166000, C324S173000, C324S207250, C324S207170, C324S209000, C073S779000, C073S862331
Reexamination Certificate
active
07034522
ABSTRACT:
A non-contact rotation speed and torque sensing device which uses the natural inhomogeneities in the magnetic properties of a rotating element (4) to measure movement, displacement and deformation of the rotating element. An alternating magnetic field is applied in the region of a rotating element (4) and a signal representing the change in magnetic flux caused by the inhomogeneities of the magnetic structure of the object is received at a sensor (1). By processing the sensed signal using the auto-correlation function, the speed of rotation of the element (4) may be determined through inspection of the periodicity of the signal.
REFERENCES:
patent: 3940979 (1976-03-01), Ward et al.
patent: 3980913 (1976-09-01), Peterson
patent: 4100794 (1978-07-01), Meixner
patent: 4414856 (1983-11-01), Winterhoff
patent: 4481471 (1984-11-01), Miller et al.
patent: 4602515 (1986-07-01), Eichenlaub
patent: 4639595 (1987-01-01), Okita et al.
patent: 4691192 (1987-09-01), Baker
patent: 4939937 (1990-07-01), Klauber et al.
patent: 5111138 (1992-05-01), Kramer
patent: 5606137 (1997-02-01), Penketh
patent: 5675094 (1997-10-01), Klauber et al.
patent: 5754042 (1998-05-01), Schroeder et al.
patent: 6084368 (2000-07-01), Doemens et al.
patent: 4 313 556 (1994-09-01), None
patent: 4 331 024 (1995-03-01), None
patent: 0 046 517 (1982-03-01), None
patent: 0 103 354 (1984-03-01), None
patent: 0 167 656 (1986-01-01), None
patent: 0 168 692 (1986-01-01), None
patent: 0 261 980 (1988-03-01), None
patent: 0 464 964 (1992-01-01), None
patent: 2 008 765 (1979-06-01), None
patent: 1 586 080 (1981-03-01), None
K. Miyashita et al, “Non-Contact Magnetic Torque Sensor”IEEE Transactions on Magnetics, vol. 26, No. 5, 1990, pp. 1560-1562.
W. Krimmel, “Induktive Aufnehmer Mit Zukunft”Messen Prufen Automatisieren, Nov. 1985, pp. 614-618.
R. Wolffenbuttel et al, “Noncontact Capacitive Torque Sensor For Use on a Rotating Axle”IEEE Transactions on Instrumentation and Measurement, vol. 39, No. 6, Dec. 1990, pp. 1008-1013.
F.E. Scoppe, “Magnetostrictive Torque Transducer”Instrumentation Technology, vol. 16, Oct. 1969, pp. 95-99.
Patidar Jay
Weston Aerospace Limited
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