WO2002031432A3 - Capacitive displacement encoder - Google Patents

Capacitive displacement encoder Download PDF

Info

Publication number
WO2002031432A3
WO2002031432A3 PCT/IL2001/000932 IL0100932W WO0231432A3 WO 2002031432 A3 WO2002031432 A3 WO 2002031432A3 IL 0100932 W IL0100932 W IL 0100932W WO 0231432 A3 WO0231432 A3 WO 0231432A3
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
transmitter
receiver
fields
capacitive displacement
Prior art date
Application number
PCT/IL2001/000932
Other languages
French (fr)
Other versions
WO2002031432A2 (en
Inventor
Yishay Netzer
Original Assignee
Netzer Prec Motion Sensors Ltd
Yishay Netzer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/294,749 external-priority patent/US6492911B1/en
Application filed by Netzer Prec Motion Sensors Ltd, Yishay Netzer filed Critical Netzer Prec Motion Sensors Ltd
Priority to AU2002210873A priority Critical patent/AU2002210873A1/en
Publication of WO2002031432A2 publication Critical patent/WO2002031432A2/en
Publication of WO2002031432A3 publication Critical patent/WO2002031432A3/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G01D5/241Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
    • G01D5/2412Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying overlap
    • G01D5/2415Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying overlap adapted for encoders
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24Housings ; Casings for instruments
    • G01D11/245Housings for sensors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/73Targets mounted eccentrically with respect to the axis of rotation

Abstract

A capacitive angle encoder is shown in Figure (1) includes a rotating shaft (150) and a transmitter (52). Multiple segments are disposed about the shaft, each segment generating a periodic electric field at a common frequency, but having a different, predetermined phase from the other segments. A receiver (54) generates signals responsive to the fields from the multiple segments such that the strength of reception of each of the fields is modulated by a variation of a capacitance between the transmitter and the receiver as a function of rotation of the shaft. A detector circuit (64) processes the signals to generate an output indicative of the rotation angle.
PCT/IL2001/000932 1999-04-19 2001-10-07 Capacitive displacement encoder WO2002031432A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002210873A AU2002210873A1 (en) 2000-10-12 2001-10-07 Capacitive displacement encoder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/294,749 US6492911B1 (en) 1999-04-19 1999-04-19 Capacitive displacement encoder
IL13898300A IL138983A0 (en) 2000-10-12 2000-10-12 Capacitive displacement encoder
IL138983 2000-10-12

Publications (2)

Publication Number Publication Date
WO2002031432A2 WO2002031432A2 (en) 2002-04-18
WO2002031432A3 true WO2002031432A3 (en) 2002-09-12

Family

ID=11074731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2001/000932 WO2002031432A2 (en) 1999-04-19 2001-10-07 Capacitive displacement encoder

Country Status (3)

Country Link
AU (1) AU2002210873A1 (en)
IL (1) IL138983A0 (en)
WO (1) WO2002031432A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7423176B2 (en) * 2004-04-13 2008-09-09 Cephalon, Inc. Bicyclic aromatic sulfinyl derivatives
EP2330388B1 (en) * 2009-12-04 2013-09-04 Hengstler GmbH Method of determining an absolute angle of rotation of a capacitive motion encoder
DE102010050608A1 (en) 2010-11-05 2012-05-10 Hengstler Gmbh Capacitive rotation sensor
DE102012218890A1 (en) * 2012-10-17 2014-04-17 Dr. Johannes Heidenhain Gmbh Absolute position measuring device
US11567471B2 (en) 2021-06-28 2023-01-31 Stmicroelectronics (China) Investment Co. Digital resolver decoder with hardware filter and rectifier

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312892A (en) * 1964-05-04 1967-04-04 Technology Instr Corp Of Calif Contactless electrical transducer having moving parts
US3668672A (en) * 1970-11-13 1972-06-06 Bausch & Lomb Capacitive transducer
US3732553A (en) * 1971-04-16 1973-05-08 Spearhead Inc Capacitive pick-off transducer
US3845377A (en) * 1972-04-20 1974-10-29 Nihon Regulator Kk Rotational angle transducer
US3961318A (en) * 1975-01-17 1976-06-01 Inductosyn Corporation Electrostatic position-measuring transducer
US4092579A (en) * 1976-12-15 1978-05-30 Contraves Goerz Corporation Brushless printed circuit resolver
US4238781A (en) * 1979-02-09 1980-12-09 Westinghouse Electric Corp. Capacitive angular displacement transducer for remote meter reading
US4429307A (en) * 1982-01-29 1984-01-31 Dataproducts Corporation Capacitive transducer with continuous sinusoidal output
US4586260A (en) * 1984-05-29 1986-05-06 The L. S. Starrett Company Capacitive displacement measuring instrument
US4788546A (en) * 1984-10-29 1988-11-29 Mitutoyo Mfg. Co., Ltd. Electrostatic capacity type encoder
US4850835A (en) * 1986-09-15 1989-07-25 Werner & Pfleiderer Gmbh Cooling device for plastic granulate
US4906992A (en) * 1988-02-22 1990-03-06 Dynamics Research Corporation Single track absolute encoder
US4947166A (en) * 1988-02-22 1990-08-07 Dynamics Research Corporation Single track absolute encoder
US5172039A (en) * 1991-09-16 1992-12-15 Staodyn, Inc. Device utilizing capacitive coupling to provide an output indicative of angular relationship
US5519393A (en) * 1993-07-22 1996-05-21 Bouens, Inc. Absolute digital position encoder with multiple sensors per track
US5598153A (en) * 1991-12-30 1997-01-28 Brasseur; Georg Capacitive angular displacement transducer
US5880683A (en) * 1993-07-22 1999-03-09 Bourns, Inc. Absolute digital position encoder
US6118283A (en) * 1997-10-20 2000-09-12 Methode Electronics, Inc. Capacitive rotary position sensor
US6170162B1 (en) * 1999-05-27 2001-01-09 Sarcos, L.C. Rotary displacement system using differential measuring

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312892A (en) * 1964-05-04 1967-04-04 Technology Instr Corp Of Calif Contactless electrical transducer having moving parts
US3668672A (en) * 1970-11-13 1972-06-06 Bausch & Lomb Capacitive transducer
US3732553A (en) * 1971-04-16 1973-05-08 Spearhead Inc Capacitive pick-off transducer
US3845377A (en) * 1972-04-20 1974-10-29 Nihon Regulator Kk Rotational angle transducer
US3961318A (en) * 1975-01-17 1976-06-01 Inductosyn Corporation Electrostatic position-measuring transducer
US4092579A (en) * 1976-12-15 1978-05-30 Contraves Goerz Corporation Brushless printed circuit resolver
US4238781A (en) * 1979-02-09 1980-12-09 Westinghouse Electric Corp. Capacitive angular displacement transducer for remote meter reading
US4429307A (en) * 1982-01-29 1984-01-31 Dataproducts Corporation Capacitive transducer with continuous sinusoidal output
US4586260A (en) * 1984-05-29 1986-05-06 The L. S. Starrett Company Capacitive displacement measuring instrument
US4788546A (en) * 1984-10-29 1988-11-29 Mitutoyo Mfg. Co., Ltd. Electrostatic capacity type encoder
US4850835A (en) * 1986-09-15 1989-07-25 Werner & Pfleiderer Gmbh Cooling device for plastic granulate
US4906992A (en) * 1988-02-22 1990-03-06 Dynamics Research Corporation Single track absolute encoder
US4947166A (en) * 1988-02-22 1990-08-07 Dynamics Research Corporation Single track absolute encoder
US5172039A (en) * 1991-09-16 1992-12-15 Staodyn, Inc. Device utilizing capacitive coupling to provide an output indicative of angular relationship
US5598153A (en) * 1991-12-30 1997-01-28 Brasseur; Georg Capacitive angular displacement transducer
US5519393A (en) * 1993-07-22 1996-05-21 Bouens, Inc. Absolute digital position encoder with multiple sensors per track
US5880683A (en) * 1993-07-22 1999-03-09 Bourns, Inc. Absolute digital position encoder
US6118283A (en) * 1997-10-20 2000-09-12 Methode Electronics, Inc. Capacitive rotary position sensor
US6170162B1 (en) * 1999-05-27 2001-01-09 Sarcos, L.C. Rotary displacement system using differential measuring

Also Published As

Publication number Publication date
AU2002210873A1 (en) 2002-04-22
WO2002031432A2 (en) 2002-04-18
IL138983A0 (en) 2001-11-25

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