Electricity: measuring and testing – Magnetic – Displacement
Patent
1995-02-02
1997-04-01
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Displacement
G01B 714
Patent
active
056170238
ABSTRACT:
A contactless position sensor uses at least a first magnetic flux source on one side of an object, wherein a sensor is responsive to the flux, for providing a sensed signal indicative of varying positions (x) of the first magnetic flux source and the object relative to each other, including a null position (g), wherein the sensed signal is related to the null position and the varying positions according to a relation (1/(g+x))-(1/(g-x)). An additional magnetic flux source can be provided on the other side of the object for providing additional flux sensed by the sensing means, wherein the first and second magnetic flux sources can be arranged to move in unison with respect to the object, or can be stationary while the object moves between them. The second flux source can be made stationary and its flux directed to either the object or to a second object with a fixed distance therebetween. Or, the second flux source can be dispensed with entirely and simulated by a bias signal. The flux sources can be cores with coils wound thereon having the shape of a pot or an E. The sources can be permanent magnets. A simple signal processing technique for linearizing the output can be used in most cases and comprises a simple divider. Certain sensors can even be used without needing a divider in a certain limited linear range.
REFERENCES:
patent: 3079545 (1963-02-01), Kretsch et al.
patent: 3205485 (1965-09-01), Noltingk
patent: 3336525 (1967-08-01), Church
patent: 3849724 (1974-11-01), Ghibu et al.
patent: 3890516 (1975-06-01), Widdowson et al.
patent: 3961243 (1976-06-01), Schulz
patent: 4387339 (1983-06-01), kerblom
patent: 4447743 (1984-05-01), Bean et al.
patent: 4560930 (1985-12-01), Kouno
patent: 4570118 (1986-02-01), Tomczak et al.
patent: 4591795 (1986-05-01), McCorkle
patent: 4649340 (1987-03-01), Zabler
patent: 4651130 (1987-03-01), Pennell
patent: 4717874 (1988-01-01), Ichikawa et al.
patent: 4752732 (1988-06-01), Van Schoiack et al.
patent: 4754849 (1988-07-01), Ando
patent: 4774465 (1988-09-01), Nilius
patent: 4800978 (1989-01-01), Wasa et al.
patent: 4816759 (1989-03-01), Ames et al.
patent: 4904921 (1990-02-01), DeVito et al.
patent: 4982156 (1991-01-01), Lewis et al.
patent: 5047715 (1991-09-01), Morgenstern
patent: 5294757 (1994-03-01), Skalski et al.
patent: 5300884 (1994-04-01), Maestre
patent: 5329077 (1994-07-01), Skalski et al.
patent: 5339030 (1994-08-01), Hayashi
patent: 5373123 (1994-12-01), Skalski
A Linear Output Hall Effect Transducer for Automotive Systems, Norman Wheelock, SAE Tech. Paper Series No. 810379, pp. 23-27, Feb., 1981.
Maguire, Jr. Francis J.
O'Shea Sandra L.
Otis Elevator Company
Phillips Roger
LandOfFree
Industrial contactless position sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Industrial contactless position sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Industrial contactless position sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-542204