Electricity: measuring and testing – Magnetic – Displacement
Patent
1989-02-10
1990-08-21
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Displacement
73314, 32420714, 32420716, 34087033, G01B 714, G01F 2362
Patent
active
049509888
ABSTRACT:
A position sensor and method for detecting and providing an indication of the position of a movable member comprising a ferromagnetic element oriented substantially parallel to the path of travel of the movable member, the element including a segment thereof having spaced-apart ends defining the positional limits between which movement of the movable member is to be monitored, the segment comprising a pair of contiguous, oppositely polarized, remanently magnetized regions defining an intersection along the length of the segment; a magnet positioned proximate the intersection and mounted in known spatial relationship to the movable member for movement therewith, and, simultaneously along the ferromagnetic element, the magnet providing a magnetic field presenting a constant polarity to the element and having a strength sufficient to locally polarize the element, whereby movement of the magnet means along the element alters the length of the respective regions; and, means for sensing the position of the intersection without altering that position and for providing an indication of the position of the movable member based thereon.
REFERENCES:
patent: 3128625 (1964-04-01), Heineman
patent: 3305770 (1967-02-01), Hulls
patent: 3332009 (1967-07-01), Seale
patent: 3480854 (1969-11-01), Jaquith et al.
patent: 3898555 (1975-08-01), Tellerman
patent: 3958202 (1976-05-01), Sidor
patent: 3958203 (1976-05-01), Bernin
patent: 4071818 (1978-01-01), Krisst
patent: 4121185 (1978-10-01), Genz
patent: 4194397 (1980-03-01), Yasuda
patent: 4457171 (1984-07-01), Gebauer
patent: 4774465 (1988-09-01), Nilius
patent: 4841246 (1989-06-01), Juds et al.
Garshelis et al., paper No. ER-14, "A Magnetic Position Sensor", 4th Joint MMM-Intermag Conference, Vancouver, B.C., Canada, Jul. 13, 1988. Also cited as J. Appl. Phys., 64(10), 5699-5701, Nov. 15, 1988.
Garshelis et al., "An Improved Magnetic Position Sensor", 2 pages, submitted Dec., 1988 to Intermag '89, Washington, D.C.
MTS Systems Corporation, "Level Plus Tank Monitoring Systems", 1987 Sales Brochure.
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