Connect public, paid and private patent data with Google Patents Public Datasets

Inductive position sensing device and method

Info

Publication number
CA2574178A1
CA2574178A1 CA 2574178 CA2574178A CA2574178A1 CA 2574178 A1 CA2574178 A1 CA 2574178A1 CA 2574178 CA2574178 CA 2574178 CA 2574178 A CA2574178 A CA 2574178A CA 2574178 A1 CA2574178 A1 CA 2574178A1
Authority
CA
Grant status
Application
Patent type
Prior art keywords
sensor
device
body
accordance
field
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2574178
Other languages
French (fr)
Other versions
CA2574178C (en )
Inventor
Richard O. Glasson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Control Products Inc
Original Assignee
Control Products Inc.
Richard O. Glasson
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

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
    • G01D5/142Mechanical 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 using Hall-effect devices
    • G01D5/147Mechanical 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 using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other

Abstract

A field-altering device for an inductive sensor has an elongated body with a substantially saw-tooth profile. The body is made of steel or other type ferrous material. With use in a Hall-effect sensor, the body moves relative to the sensor causing the field to vary periodically with time. The sensor generates an electrical signal in dependence on the field variations, the electrical signal having a saw-tooth pattern.

Claims (25)

1. A sensing device comprising:
at least one inductive sensor; and a body moveable relative to said sensor, said body comprised of a material capable of altering a magnetic field, said body further having a surface with a substantially saw tooth profile in a direction of relative travel between said body and said inductive sensor.
2. A device in accordance with claim 1 wherein said at least one inductive sensor is a magnetic effect sensor.
3. A device in accordance with claim 2 wherein said at least one magnetic effect sensor is a Hall sensor.
4. A device in accordance with claim 1 wherein said body comprises a ferrous material.
5. A device in accordance with claim 1 wherein said body is at least partially cylindrical in shape with said saw tooth profile disposed along an axial length of said cylindrical body.
6. A device in accordance with claim 1 wherein said saw tooth profile includes at least two conical sections in said saw tooth profile.
7. A device in accordance with claim 6 wherein at least two of said conical sections have substantially uniform slope angles.
8. A device in accordance with claim 7 wherein at least two of said conical sections have a substantially uniform length in the direction of travel.
9. A device in accordance with claim 6 wherein said saw tooth pattern sections possesses at least two different slope angles within at least one particular region of movement requiring greater relative position precision relative to regions requiring lesser relative position precision.
10. A device in accordance with claim 1 further comprising at least one magnet disposed to provide said magnetic field wherein movement of the body relative to said sensor creates a time-varying magnetic field, said sensor operable to provide an output signal in dependence on said time-varying magnetic field.
11. A device in accordance with claim 1 further comprising at least another magnet, said at least one magnet and at least another magnet arranged in a push-pull configuration.
12. A device in accordance with claim 1 further comprising a processor responsive to signals from the at least one sensor, and instructions for instructing the processor to carry out steps in response to the signals.
13. A device in accordance with claim 12 further comprising at least another sensor, wherein the processor causes a sensing function to alternate between the at least one sensor and the at least another sensor.
14. A device in accordance with claim 11, wherein said saw tooth profile includes at least two conical sections in said saw tooth profile, each said segment having a predetermined length value and slope angle value accessible to the processor, the instructions including instructions for comparing the predetermined length value to a measured length value for the conical sections and to adjust the slope angle value in response to the comparison.
15. A device in accordance with claim 13 wherein the at least one sensor and the at least another sensor are disposed in offset relation.
16. A sensing device comprising:

a first inductive sensor and a second inductive sensor disposed in offset relation to each other;

a body moveable relative to said sensors, said body comprising a material capable of altering a magnetic field, wherein the sensors and the body are disposed in the magnetic field, said body further having a surface profile capable of causing a time dependent variation to the magnetic field when said body moves relative to said sensors;

a substantially magnetically permeable envelope enclosing at least a portion of said body; and processing circuitry responsive to outputs of the sensors.
17. A device in accordance with claim 16 wherein said body profile includes a region having at least two repeated profile patterns.
18. A device in accordance with claim 17 wherein said repeated profile pattern is a saw tooth pattern.
19 19. A device in accordance with claim 17 wherein said repeated profile pattern is a substantially sinusoidal pattern.
20. A device in accordance with claim 16 wherein said inductive sensor is a magnetic effect sensor.
21. A device in accordance with claim 20 wherein said magnetic effect sensor is a Hall sensor.
22. A method for generating a time varying field coupled to an inductive sensor comprising the steps of:

moving an elongated body relative to the inductive sensor, the body comprised of a material capable of altering a magnetic field and having a profile including a portion defining an angle with an axis of the elongated body, the angle having a magnitude of less than 90 degrees.
23. A field altering device for an inductive sensor comprising:

an elongated body comprised of a material capable of altering a magnetic field and having a periodic profile over at least a portion thereof; and a magnetically permeable envelope enclosing at least a portion of said elongated body.
24. A field altering device in accordance with claim 23 wherein each period includes a portion defining an angle with an axis of the elongated body, the angle having a magnitude of less than 90 degrees.
25. A device in accordance with claim 1 wherein the body rotatably moves relative to the at least one inductive sensor.
CA 2574178 2004-07-21 2005-07-21 Inductive position sensing device and method Active CA2574178C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10896335 US7609055B2 (en) 2004-07-21 2004-07-21 Position sensing device and method
US10/896,335 2004-07-21
PCT/US2005/026306 WO2006020364A1 (en) 2004-07-21 2005-07-21 Inductive position sensing device and method

Publications (2)

Publication Number Publication Date
CA2574178A1 true true CA2574178A1 (en) 2006-02-23
CA2574178C CA2574178C (en) 2012-05-01

Family

ID=35276343

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2574178 Active CA2574178C (en) 2004-07-21 2005-07-21 Inductive position sensing device and method

Country Status (4)

Country Link
US (1) US7609055B2 (en)
CA (1) CA2574178C (en)
EP (1) EP1784619A1 (en)
WO (1) WO2006020364A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2438342A4 (en) * 2009-06-03 2014-03-05 Control Products Inc Hydraulic accumulator with position sensor

Family Cites Families (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498799A (en) 1945-03-23 1950-02-28 Orville C Erickson Clothesline reeling device
US3403365A (en) 1964-05-04 1968-09-24 Gen Electric Shielded transducer having means to reduce core movement
JPS4854957A (en) 1971-11-08 1973-08-02
GB1485646A (en) 1973-11-16 1977-09-14 Hitachi Ltd Digital displacement sensors
US4057904A (en) 1975-06-27 1977-11-15 The United States Of America As Represented By The Secretary Of The Department Of Transportation Self-adjusting string extensiometer
US3988710A (en) 1975-11-24 1976-10-26 Illinois Tool Works Inc. Contactless linear rotary potentiometer
DE2635614A1 (en) 1976-08-07 1978-02-09 Georg Rudolf Sillner Control potentiometer with external setting - has spiral groove in which contact driven by pressure element moves to change setting
US4121504A (en) 1977-01-21 1978-10-24 Inovec, Inc. Cylinder positioning systems
US4286386A (en) 1977-09-06 1981-09-01 Long Irvin E Electro-mechanical displacement measuring device
US4214180A (en) 1978-03-23 1980-07-22 Kabushiki Kaisha Tokai Rika Denki Seisakusho Miniature electric motor employing a conversion mechanism for linear movement
US4356557A (en) 1978-04-06 1982-10-26 Cooper Industries, Inc. Winch drum cable length measurement apparatus
US4342884A (en) 1978-06-14 1982-08-03 Itsuki Ban Piston unit
NL8000934A (en) 1979-02-21 1980-08-25 Kaufeldt Roland A method and apparatus for providing a rapid movement, and a gradual deceleration, and an accurately defined final position of a movable manipulator arm.
DE2914195C2 (en) 1979-04-07 1987-07-09 Mannesmann Rexroth Gmbh, 8770 Lohr, De
US4231700A (en) 1979-04-09 1980-11-04 Spectra-Physics, Inc. Method and apparatus for laser beam control of backhoe digging depth
US4288196A (en) 1979-06-14 1981-09-08 Sutton Ii James O Computer controlled backhoe
US4367998A (en) 1979-09-13 1983-01-11 United Kingdom Atomic Energy Authority Manipulators
US4386552A (en) 1980-06-16 1983-06-07 Foxwell W John Power cylinder with internally mounted position indicator
US4395695A (en) 1980-07-25 1983-07-26 Copal Company Limited Non-contact magnetic potentiometer
US4488014A (en) 1980-12-31 1984-12-11 Burlington Industries, Inc. Reeling assembly
DE3110107A1 (en) 1981-03-16 1982-09-23 Rexroth Mannesmann Gmbh Force Procedure and force-measuring device for control of the power lift of a tractor
US4480151A (en) 1982-07-19 1984-10-30 Hilliard Dozier Temperature stable hermetically sealed terminal
US4653190A (en) 1983-03-25 1987-03-31 Spain Jr Robert A Displacement transducer accommodating extreme environmental conditions
DE3585908D1 (en) 1984-10-19 1992-05-27 Kollmorgen Corp Position and speed encoder.
US4945221A (en) 1987-04-24 1990-07-31 Laser Alignment, Inc. Apparatus and method for controlling a hydraulic excavator
US4841246A (en) 1987-12-29 1989-06-20 Eaton Corporation Multiturn shaft position sensor having magnet movable with nonrotating linear moving nut
GB2216268B (en) 1988-03-31 1992-04-15 Schlumberger Ind Ltd Rotary displacement transducers
DE3829390A1 (en) 1988-08-30 1990-03-01 Rexroth Mannesmann Gmbh Method and device for speed measurement
DE3835782A1 (en) 1988-10-20 1990-04-26 Rexroth Mannesmann Gmbh Device for measuring angles of rotation
US4914389A (en) 1988-10-24 1990-04-03 Eaton Corporation Multiturn shaft position sensor with backlash compensation
JPH02186102A (en) 1989-01-10 1990-07-20 Nakamura Koki Kk Piston position detecting device for piston type accumulator
EP0533718B1 (en) 1990-06-15 1995-01-11 Nokia-Maillefer Oy Arrangement in a coil winding machine for a cable or a similar strandlike product
US5046243A (en) 1990-11-05 1991-09-10 Gte Products Corporation Method of mounting electrical contacts in connector body
EP0486848B1 (en) 1990-11-17 1997-06-04 August Bilstein GmbH Relative speed or position for a damper piston moving inside a damper body
DE4038674A1 (en) 1990-12-04 1992-06-11 Automata Gmbh Ind & Robotic Co An apparatus for determining the absolute actual position of a movable member along a predetermined route
US5789917A (en) 1990-12-05 1998-08-04 Moving Magnet Technologie Sa Magnetic position sensor with hall probe formed in an air gap of a stator
US5200747A (en) 1990-12-13 1993-04-06 Bourns, Inc. Turn counting position sensor
FR2674294B1 (en) 1991-03-22 1993-12-17 Etudes Montages Hydraulic cylinder positioning servo movable rod.
US5389876A (en) 1991-05-06 1995-02-14 General Electric Company Flexible eddy current surface measurement array for detecting near surface flaws in a conductive part
US5156242A (en) 1991-11-27 1992-10-20 Al-Ro Inc. Helical telephone cord winding device
US5203723A (en) 1992-02-27 1993-04-20 Halliburton Logging Services Inc. Low cost plastic hermetic electrical connectors for high pressure application
DE69432192T2 (en) 1993-10-12 2003-12-04 Smc Kk linear actuator
US5444369A (en) 1993-02-18 1995-08-22 Kearney-National, Inc. Magnetic rotational position sensor with improved output linearity
US5341724A (en) 1993-06-28 1994-08-30 Bronislav Vatel Pneumatic telescoping cylinder and method
US5467938A (en) 1993-09-20 1995-11-21 Redman; David W. Spool having adjustable end plates
US5757179A (en) 1994-03-04 1998-05-26 Cts Corporation Position sensor with improved magnetic circuit
US5404661A (en) 1994-05-10 1995-04-11 Caterpillar Inc. Method and apparatus for determining the location of a work implement
US5541405A (en) 1994-07-27 1996-07-30 Parker-Hannifin Corporation Method and device for continuous pattern sensing using fiber optics
US5768946A (en) 1994-10-11 1998-06-23 Cts Corporation Pedal with integrated position sensor
US5659248A (en) 1994-10-17 1997-08-19 General Electric Company Multilayer eddy current probe array for complete coverage of an inspection surface without mechanical scanning
US5955881A (en) 1994-10-18 1999-09-21 Cts Corporation Linkage position sensor having a magnet with two ramped sections for providing variable magnetic field
US5694042A (en) 1995-09-15 1997-12-02 Turck, Inc. Angular displacement sensor for rotationally reciprocating elements
US5681006A (en) 1996-01-22 1997-10-28 General Electric Company Apparatus for winding an electrical conductor on a coil form
US5973494A (en) 1996-05-13 1999-10-26 Mitutoyo Corporation Electronic caliper using a self-contained, low power inductive position transducer
US5701793A (en) 1996-06-24 1997-12-30 Catepillar Inc. Method and apparatus for controlling an implement of a work machine
US5752811A (en) 1996-11-15 1998-05-19 Petro; John P. Linear actuator mechanism for converting rotary to linear movement including one end pulley Line attached to the stationary anchor and other end attached to the take-up drum
NL1004624C2 (en) 1996-11-27 1998-05-28 Nedap Nv Compact incremental position with an absolute reference.
US5841274A (en) 1997-01-29 1998-11-24 Mitutoyo Corporation Induced current absolute position transducer using a code-track-type scale and read head
US5894678A (en) 1997-01-29 1999-04-20 Mitutoyo Corporation Electronic linear tape measure using a low power induced current position transducer
DE19724387A1 (en) 1997-06-10 1998-12-17 Bosch Gmbh Robert displacement sensor
DE19726285A1 (en) 1997-06-20 1998-12-24 Siemens Ag Method and device for winding strand-shaped winding material onto a spool
US5936399A (en) 1997-09-16 1999-08-10 Mitutoyo Corporation Inductive position transducer having a multi-tap receiver winding
DE19820160A1 (en) 1997-10-07 1999-04-08 Heidelberger Druckmasch Ag Rotary angle measuring device for printers
US5901458A (en) 1997-11-21 1999-05-11 Mitutoyo Corporation Electronic caliper using a reduced offset induced current position transducer
JPH11223505A (en) 1997-12-03 1999-08-17 Mitsutoyo Corp Induction type position measurement device
JPH11211410A (en) 1998-01-30 1999-08-06 Matsushita Electric Ind Co Ltd Non-contact position sensor
DE19814758A1 (en) 1998-04-02 1999-10-07 Zahnradfabrik Friedrichshafen Number of revolutions and direction of rotation detecting device
US6669135B1 (en) 1998-04-28 2003-12-30 Brian Hartley Reel arrangement with detachable drive means
DE19839028C1 (en) 1998-08-27 2000-02-10 Asm Automation Sensorik Messte Directional sensor which uses a measurement cord, comprises a housing which contains a cord drum and rotational spring, and a rotational angle sensor
US6234061B1 (en) 1998-10-20 2001-05-22 Control Products, Inc. Precision sensor for a hydraulic cylinder
US6160395A (en) 1998-11-06 2000-12-12 Honeywell, Inc. Non-contact position sensor
DE19859444C2 (en) 1998-12-22 2000-11-16 Asm Automation Sensorik Messte Meßseilwegsensor
JP2000205811A (en) * 1999-01-08 2000-07-28 Alps Electric Co Ltd Rotary sensor
DE19908036A1 (en) 1999-02-24 2000-08-31 Zahnradfabrik Friedrichshafen Method for acquiring the rotary and translational movement of main switching shaft e.g. of motor vehicle transmission using permanent magnets and linear inductive contactless position sensor
FR2794236B1 (en) 1999-05-26 2006-06-16 Serta Device allowing to know the position and measure the displacements of the piston or the piston rod in the chamber of a type comprising a rectilinear bailer potentiometric sensor linear
US6253460B1 (en) * 1999-06-10 2001-07-03 Geoffrey W. Schmitz Apparatus for position measurement and a system and a method for using the same
US6279248B1 (en) 1999-09-22 2001-08-28 Central Purchasing, Inc. Digital measuring system having a multi-row encoder disk
US6335618B1 (en) 1999-10-05 2002-01-01 Mitutoyo Corporation Position transducer having position-dependent amplitude encoding applying first and second modulations
DE59910765D1 (en) 1999-11-16 2004-11-11 Asm Automation Sensorik Messte Measuring cable travel sensor
US6450048B1 (en) 2000-02-11 2002-09-17 Gomaco Corp Hydraulic cylinder monitoring apparatus
US6636035B2 (en) 2000-03-13 2003-10-21 Mitutoyo Corporation Position measuring device and error detecting method for the same, and electromagnetic induction position detecting device
US6501264B2 (en) 2000-03-13 2002-12-31 Mitutoyo Corporation Induction type transducer and electronic caliper
JP3668406B2 (en) 2000-03-13 2005-07-06 株式会社ミツトヨ Electromagnetic induction type position detecting device
JP3504904B2 (en) 2000-03-13 2004-03-08 株式会社ミツトヨ Induction type transducer and an electronic caliper
DE50011024D1 (en) 2000-06-16 2005-09-29 Amo Automatisierung Mestechnik Inductive length measuring system
DE20015895U1 (en) 2000-09-14 2000-12-07 Helag Electronic Gmbh sensor device
US6588313B2 (en) 2001-05-16 2003-07-08 Rosemont Inc. Hydraulic piston position sensor
US6487787B1 (en) 2001-08-03 2002-12-03 Mitutoyo Corporation System and method for determination of error parameters for performing self-calibration and other functions without an external position reference in a transducer
JP3842099B2 (en) 2001-10-12 2006-11-08 株式会社ミツトヨ Magnetic encoder
EP1461585B1 (en) 2002-01-04 2010-12-08 Parker Hannifin Corporation Cylinder with optical sensing device and method
FR2844591B1 (en) * 2002-09-13 2005-04-15 Arvinmeritor Light Vehicle Sys Device for determining the displacement of a shaft

Also Published As

Publication number Publication date Type
US20060017431A1 (en) 2006-01-26 application
CA2574178C (en) 2012-05-01 grant
WO2006020364A1 (en) 2006-02-23 application
US7609055B2 (en) 2009-10-27 grant
EP1784619A1 (en) 2007-05-16 application

Similar Documents

Publication Publication Date Title
WO2007111182A1 (en) Apparatus and method for measuring compression force of flexible linear body
WO2007066692A1 (en) Exposure method, exposure apparatus, and method for manufacturing device
WO2007055218A1 (en) Induction heating device
WO2007100092A1 (en) Eccentric magnetic body coil system
JP2006315858A (en) Abrasion detection device of conveyer belt
WO2009040998A1 (en) Contactless charger
WO2005005292A1 (en) Method and device for measuring conveyor belt elongation, method and device for measuring conveyor belt wear extent, method and device for measuring conveyor belt temperature, rubber magnet sheet, and method of producing rubber magnet sheet
JPS61134601A (en) Magnetic type displacement sensor
WO2001032366A1 (en) Robot system, robot device, and its cover
WO2007023899A1 (en) Drive assistance device, drive assistance method, drive assistance program, and recording medium
WO2001027733A1 (en) Information inputting device utilizing turning operation
WO2005005929A3 (en) Contactless scanning by means of a magnetoresistive sensor
DE10344586A1 (en) Distance measurement device for contactless distance measurement between reference plane and measurement object has first and second measurement stops formed by first side of measurement stop body that can be moved out of housing
WO2009028667A1 (en) Device for detecting wear conditions of conveyor belt
WO2006054682A1 (en) Position measurement method, position control method, measurement method, loading method, exposure method, exoposure apparatus, and device production method
GB2390168B (en) GMR magnetic detecting element and a method of manufacturing the detecting element
WO2008126389A1 (en) Safe driving assisting device
WO2006023147A3 (en) Capacitive sensing apparatus having varying depth sensing elements
WO2008004497A1 (en) System for guiding medical device
WO2007049639A1 (en) Position detecting apparatus and optical device
DE10337599A1 (en) Contraction unit has position sensing device to record distance between head pieces and incorporates two overlapping measuring elements extending inside sleeve from one head piece to other
WO2004093514A1 (en) Method and system for carrying substrate
WO2006025400A1 (en) Position sensor and introduction-into-subject system
DE10344267A1 (en) Vehicle steering system steering angle determination procedure stores relative difference between straight and ignition on angles to use with measured position on starting
WO2004065142A1 (en) Tire, its forming method, device for reducing external magnetic field of tire, and vehicle mounted with that tire

Legal Events

Date Code Title Description
EEER Examination request