Method and apparatus for electromagnetic non-contact position measurement with respect to one or more axes

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5247261
SERIAL NO

07773848

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A preferred embodiment of the invention is an apparatus for measuring the position of a point with respect to at least one axis. The apparatus includes a reference electrode located at the reference point and at least one axial electrode fixed along the at least one axis. The axial electrode has a signal transmission property, such as resistivity, as measured between a first end and a point along the axis, which signal transmission property varies with the location of the point of measurement. The axial electrode is coupled to the reference electrode, typically capacitively. The apparatus also includes means for applying an electric signal to the reference electrode; means for measuring an output electric signal at the first end of the at least one axial electrode; and means for evaluating the relation between the output electric signal and the input electric signal to determine the position of the reference point relative to the axis. The invention also includes method of using the apparatus to determine the location of the reference point to the axis. The invention includes embodiments of one and more axes.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MASSACHUSETTS INSTITUTE OF TECHNOLOGYCAMBRIDGE, MA3306

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gershenfeld, Neil A Cambridge, MA 7 67

Cited Art Landscape

Patent Info (Count) # Cites Year
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (1)
* 4980519 Three dimensional baton and gesture sensor 120 1990
 
C E JOHANSSON AB (1)
* 4743902 Measuring device for capacitive determination of the relative position of the two with respect to one another movable parts 42 1986
 
AGENCE SPATIALE EUROPEENNE (1)
* 4562430 Position detection device for magnetic bearing 21 1982
 
Mitutoyo Mfg. Co., Ltd. (1)
* 4733235 Capacitance type displacement measuring instrument 12 1984
* Cited By Examiner

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (7)
* 6150600 Inductive location sensor system and electronic percussion system 14 1998
6373235 Apparatus and method for determining the position and motion of an object and for precise measurement of phase-related values 8 2000
6498471 Apparatus and method for direct digital measurement of electrical properties of passive components 2 2001
* 2003/0132,922 Touch screen detection apparatus 87 2003
* 7605317 Bow-to-string pressure training device for bowed string music instruments 5 2008
* 2009/0188,369 Bow-to-string pressure training device for bowed string music instruments 2 2008
* 2012/0240,751 HYBRID STRINGED INSTRUMENT 5 2012
 
NIDEC ELESYS AMERICAS CORPORATION (1)
* 5948031 Vehicle passenger sensing system and method 91 1996
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
* 5987269 Toner quantity measuring technique in an electrophotographic printer 29 1998
 
Telsima Inc. (1)
* 2002/0059,408 Dynamic traffic management on a shared medium 48 2001
 
GE SECURITY, INC. (1)
7049965 Surveillance systems and methods 40 2003
 
INTELLIGENT MECHATRONIC SYSTEMS INC. (3)
7370883 Three dimensional occupant position sensor 24 2002
7135983 Occupant presence detection device 34 2002
6693442 Vehicle occupant proximity sensor 4 2003
 
HONEYWELL INTERNATIONAL INC. (1)
6204672 System for producing paper product including a compact high-resolution under wire water weight sensor array 5 2000
 
NXP USA, INC. (1)
7466146 Frozen material detection using electric field sensor 2 2006
 
METHODE ELECTRONICS, INC. (3)
* 5802479 Motor vehicle occupant sensing systems 115 1996
* 6014602 Motor vehicle occupant sensing systems 164 1998
6275146 Vehicle occupant sensing 63 1999
 
GEMINI PROJECTS, INC. (1)
* 2009/0271,004 METHOD AND APPARATUS FOR RANGING DETECTION OF GESTURES 15 2009
 
NATIVE INSTRUMENTS GMBH (1)
* 9336762 Electronic music instrument with touch-sensitive means 0 2014
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (4)
* 5844415 Method for three-dimensional positions, orientation and mass distribution 74 1996
* 6000833 Efficient synthesis of complex, driven systems 21 1997
* 5936412 Method for resolving presence, orientation and activity in a defined space 46 1997
* 6891382 Three-dimensional characterization using a one-dimensional electrode array 2 2003
 
TK HOLDINGS INC. (3)
6703845 Occupant sensor 43 2001
* 2001/0045,733 Occupant sensor 18 2001
6825765 Occupant detection system 39 2002
 
SCHULER PRESSEN GMBH (1)
* 5625352 Method and arrangement for transmitting data, signals and energy 0 1995
 
Honeywell Measurex Devron Inc. (1)
* 6072309 Paper stock zeta potential measurement and control 4 1998
 
Honeywell-Measurex Corporation (12)
* 5928475 High resolution system and method for measurement of traveling web 19 1997
* 6087837 Compact high resolution under wire water weight sensor array 11 1997
* 5944955 Fast basis weight control for papermaking machine 8 1998
* 6076022 Paper stock shear and formation control 2 1998
* 6080278 Fast CD and MD control in a sheetmaking machine 27 1998
* 6149770 Underwire water weight turbulence sensor 11 1998
6168687 System and method for sheet measurement and control in papermaking machine 10 1998
* 6006602 Weight measurement and measurement standardization sensor 4 1998
* 6086716 Wet end control for papermaking machine 20 1998
* 6092003 Paper stock shear and formation control 26 1998
* 6126785 System and method for sheet measurement and control in papermaking machine 4 1999
* 6099690 System and method for sheet measurement and control in papermaking machine 8 1999
 
APPLE INC. (1)
6336031 Wireless data transmission over quasi-static electric potential fields 29 1998
 
Swing-Wright, LLC (2)
8864599 Teaching aid 0 2011
* 2013/0023,353 TEACHING AID 1 2011
 
Measurex Corporation (3)
* 5891306 Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems 20 1996
* 5853543 Method for monitoring and controlling water content in paper stock in a paper making machine 26 1997
* 6341522 Water weight sensor array imbedded in a sheetmaking machine roll 16 1998
 
The United States of America as represented by the United States Department of Energy (1)
* 5623095 Method for chemically analyzing a solution by acoustic means 28 1995
 
Phoenixcloud Explorations Ltd. (1)
* 5939878 Angular displacement transducer having flux-directing target and multi-sectored pole piece 8 1997
 
NEC Home Electronics, Inc. (1)
* 6161070 Passenger detection system 58 1998
 
AUTOMOTIVE SYSTEMS LABORATORY, INC. (14)
* 5964478 Electric field sensing air bag danger zone sensor 53 1997
* 5871232 Occupant position sensing system 92 1997
6302438 Occupant detection system 48 1999
6290255 Occupant detection system 24 1999
6220627 Occupant detection system 69 1999
6577023 Occupant detection system 30 1999
6563231 Occupant sensor 24 1999
6520535 Occupant detection system 34 1999
6517106 Occupant detection system 28 1999
6283504 Occupant sensor 62 1999
6378900 Occupant detection system 21 2000
6392542 Occupant sensor 57 2000
* 2003/0083,795 OCCUPANT DETECTION SYSTEM 0 2002
7098674 Occupant sensor 19 2003
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (1)
* 5768616 Apparatus for detecting electro-magnetic stylus signals by inducing current into a plurality of sensor coils using signals transmitted by the tranmitter coil of the stylus 9 1995
* Cited By Examiner