US Patent No: 5,929,631

Number of patents in Portfolio can not be more than 2000

Method of position sensing utilizing giant magneto resistance elements and solid state switch array

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Abstract

A sensing method continuously scans an array of sensing elements and determines positions by converting array peak amplitude information to a time based function. An array of magneto resistive elements responds to a relatively moving magnetic field. The process of scanning the magneto resistive elements is independent of the relatively moving magnetic field. Instead of using only one voltage source to power both the driving logic circuitry and the sensing element array, a separate voltage source for powering the sensing element array is used in conjunction with the solid switch array, thus excluding unwanted noise that originates in the driving logic circuitry.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW YORKALBANY, NY1207

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hampo, Richard Joseph Livonia, MI 11 137
Striker, David Lee Plymouth, MI 6 47

Cited Art

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (2)
4,639,807 Magnetic detector having magnetoresistive elements 23 1983
4,766,376 Magnetic position detector for detecting an absolute position of a movable member 17 1986
 
ADMOTEC, INC (1)
4,866,382 Magnetic rotary encoder system having a multi-element magnetoresistive sensor 20 1987
 
EATON CORPORATION (1)
4,922,197 High resolution proximity detector employing magnetoresistive sensor disposed within a pressure resistant enclosure 50 1988
 
LAKE SHORE CRYOTRONICS, INC. (1)
5,293,125 Self-aligning tachometer with interchangeable elements for different resolution outputs 27 1992
 
NIPPON ELECTRIC CO., LTD. (1)
4,319,188 Magnetic rotary encoder for detection of incremental angular displacement 69 1980
 
SEMIFUSION CORPORATION (1)
5,681,990 Capacitive throttle position sensor 16 1995
 
SONY CORPORATION (1)
5,430,375 Position detecting apparatus using magneto-resistance effect element 18 1994

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SIEMENS AKTIENGESELLSCHAFT (2)
6,695,282 Positioner for a valve that can be actuated by a drive 5 2002
6,655,652 Position controller for a drive-actuated valve having inherent safety design 7 2002
 
VISTEON GLOBAL TECHNOLOGIES, INC. (2)
6,084,401 Rotational position sensor employing magneto resistors 1 1998
6,316,936 Linear position sensor for a transmission manual valve 5 1999
 
ALPS ELECTRIC CO., LTD. (1)
6,496,003 Magnetic displacement detecting device having linear changing magnetic field over the length of the service 7 2000
 
CONTINENTAL TEVES AG & CO. OHG (1)
6,823,725 Linear distance sensor and the use thereof as actuator for motor vehicles 7 2002
 
HONEYWELL INTERNATIONAL INC. (1)
7,812,596 Two-dimensional position sensing system 0 2007
 
MELEXIS TESSENDERLO NV (1)
6,731,108 Device with a magnetic position encoder 10 2002
 
TETRA LAVAL HOLDINGS & FINANCE S.A. (1)
6,625,517 Position feedback system and method for use thereof 16 2000
 
THE TORRINGTON COMPANY (1)
6,307,365 Method of determining position and/or direction of a magnetic target 8 1999
 
THK CO., LTD. (1)
8,362,720 Linear motor position detection system 0 2008
 
XEROX CORPORATION (1)
6,278,270 Apparatus and method for detecting small distance changes between opposed surfaces using giant magneto resistance effect sensor 5 1999
 
YAMAHA CORPORATION (1)
7,508,196 Magnetic sensor for pointing device 1 2006
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
6,166,655 Device and method for identifying magnetic induction coordinate 5 1998