Symmetry compensation for encoder pulse width variation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6510396
SERIAL NO

09661221

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method of compensating for errors in the measurement of the kinematic properties of an electric power steering motor for an automobile is disclosed. The method comprises generating a set of M-ary signals; measuring the pulse width of the set of M-ary signals; and measuring the time between the edges of the set of M-ary signals. The motor velocity may be directly measured by a tachometer or other such device. The motor position signal can be used to estimate the angular velocity of the motor, by determining the change in angular position of the motor divided by the change in time.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PACIFIC CENTURY MOTORS, INC.DETROIT, MI24

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Colosky, Mark Philip Vassar, MI 9 200

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (3)
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* 5406267 Method and apparatus for the monitoring of the operation of linear and rotary encoders 18 1992
* 5503421 Clutch and control mechanism for fifth wheel 9 1993
 
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO (2)
4955228 Device for detecting rotation of steering wheel for automobiles 10 1989
5088319 Steering angle sensor 14 1990
 
XEROX CORPORATION (1)
4803425 Multi-phase printed circuit board tachometer 26 1987
 
KOYO SEIKO CO., LTD. (2)
6250417 Power steering apparatus 6 1999
6244372 Power steering apparatus 17 1999
 
HITACHI, LTD. (1)
* 5218279 Method and apparatus for detection of physical quantities, servomotor system utilizing the method and apparatus and power steering apparatus using the servomotor system 22 1991
 
AKAI ELECTRIC CO., LTD. (1)
4961017 Stator for use in a brushless motor 26 1988
 
Honda Giken Kogyo Kabushiki Kaisha (3)
5029466 System for detecting abnormality of steering angle sensor 18 1990
5309758 Steering angle sensor for automobile 14 1992
6286621 Electric power steering apparatus 14 2000
 
LAKE SHORE CRYOTRONICS, INC. (1)
5293125 Self-aligning tachometer with interchangeable elements for different resolution outputs 27 1992
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
6244373 Steering control apparatus for vehicle 11 1999
 
VICTOR COMPANY OF JAPAN, LTD. (1)
4924161 Position and speed detecting device 13 1989
 
EATON CORPORATION (1)
4922197 High resolution proximity detector employing magnetoresistive sensor disposed within a pressure resistant enclosure 61 1988
 
SIEMENS AKTIENGESELLSCHAFT (2)
4897603 Arrangement for determining the speed and rotor position of an electric machine 12 1989
5027648 Method and device for measuring the angle of rotation of the steering shaft of a motor vehicle 23 1989
 
ALPS ELECTRIC CO., LTD. (1)
6155106 Steering angle sensor unit 21 1998
 
Nippondenso Co., Ltd. (2)
* 4836319 Steering control apparatus for motor vehicles 31 1987
5828973 Electric power steering apparatus 28 1996
 
Kollmorgen Technologies Corporation (1)
4562399 Brushless DC tachometer 44 1983
 
DAIMLERCHRYSLER AG (1)
5902342 Detection of vibration in an AC traction system 8 1997
 
NISSAN MOTOR CO., LTD. (1)
* 5498072 Anti-skid control system for automotive vehicles 24 1995
 
MERITOR HEAVY VEHICLE TECHNOLOGY, LLC (1)
5223760 Wheel speed sensor for drive axle 24 1991
 
CANON DENSHI KABUSHIKI KAISHA (1)
5408153 Index position detecting apparatus for an electromagnetic rotary machine 35 1994
 
AlliedSignal Truck Brake Systems Co. (1)
5736852 Circuit and method for conditioning a wheel speed sensor signal 15 1995
 
GENERAL MOTORS CORPORATION (1)
4924696 Noncontacting position sensor for an automotive steering system 22 1989
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
4838074 Steering torque detecting device 11 1988
* 6246197 Electric power steering controller 19 1998
 
ORIENTAL MOTOR BOSTON TECHNOLOGY GROUP INCORPORATED (1)
5329195 Sensor motor 35 1992
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
4437061 Speed detector for sewing machines 10 1981
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION (1)
5717268 Electric motor with tachometer signal generator 18 1996
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
RPX CORPORATION (1)
7936854 Method and system of cycle slip framing in a deserializer 2 2008
 
APPLABZ, LLC (3)
9513127 Systems, methods, and apparatus for providing indoor navigation 0 2011
* 9243918 Systems, methods, and apparatus for providing indoor navigation using magnetic sensors 0 2013
* 2013/0261,964 SYSTEMS, METHODS, AND APPARATUS FOR PROVIDING INDOOR NAVIGATION USING MAGNETIC SENSORS 8 2013
 
MOVING MAGNET TECHNOLOGIES S.A. (2)
* 9097559 Non-contact multi-turn absolute position magnetic sensor comprising a through-shaft 1 2008
* 2010/0194,385 NON-CONTACT MULTI-TURN ABSOLUTE POSITION MAGNETIC SENSOR COMPRISING A THROUGH-SHAFT 10 2008
 
XENOGENIC DEVELOPMENT LIMITED LIABILITY COMPANY (1)
6917794 Phase compensation circuit 3 2001
 
STEERING SOLUTIONS IP HOLDING CORPORATION (10)
7307416 Position sensor and assembly 8 2004
7549504 Quadrant dependent active damping for electric power steering 5 2006
7543679 Compensation of periodic sensor errors in electric power steering systems 3 2006
* 2008/0023,256 Quadrant dependent active damping for electric power steering 3 2006
7725227 Method, system, and apparatus for providing enhanced steering pull compensation 13 2006
* 2008/0147,276 METHOD, SYSTEM, AND APPARATUS FOR PROVIDING ENHANCED STEERING PULL COMPENSATION 8 2006
* 2008/0048,650 POSITION SENSOR AND ASSEMBLY 2 2007
8903606 Method, system, and apparatus for providing enhanced steering pull compensation 3 2008
8447469 Electric power steering system control methods 0 2009
* 2010/0063,684 ELECTRIC POWER STEERING SYSTEM CONTROL METHODS 0 2009
 
HUAWEI TECHNOLOGIES CO., LTD. (1)
* 7245725 Dual processor framer 22 2002
 
GM GLOBAL TECHNOLOGY OPERATIONS, INC. (1)
* 2008/0024,028 Permanent magnet electric motor 8 2006
* Cited By Examiner