GB2005844A - Linear displacement sensor - Google Patents

Linear displacement sensor

Info

Publication number
GB2005844A
GB2005844A GB7839663A GB7839663A GB2005844A GB 2005844 A GB2005844 A GB 2005844A GB 7839663 A GB7839663 A GB 7839663A GB 7839663 A GB7839663 A GB 7839663A GB 2005844 A GB2005844 A GB 2005844A
Authority
GB
United Kingdom
Prior art keywords
windings
potential
core
displacement sensor
inductance
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.)
Withdrawn
Application number
GB7839663A
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.)
Industrie Magneti Marelli SRL
Marelli Europe SpA
Original Assignee
Fabbrica Italiana Magneti Marelli SpA
Magneti Marelli SpA
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
Application filed by Fabbrica Italiana Magneti Marelli SpA, Magneti Marelli SpA filed Critical Fabbrica Italiana Magneti Marelli SpA
Publication of GB2005844A publication Critical patent/GB2005844A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING 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
    • G01D5/00—Mechanical 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
    • G01D5/12—Mechanical 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
    • G01D5/14—Mechanical 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
    • G01D5/20—Mechanical 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 inductance, e.g. by a movable armature
    • G01D5/22—Mechanical 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 inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2208—Mechanical 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 inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
    • G01D5/2216—Mechanical 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 inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING 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
    • G01D5/00—Mechanical 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
    • G01D5/12—Mechanical 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
    • G01D5/244—Mechanical 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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/247—Mechanical 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 characteristics of pulses or pulse trains; generating pulses or pulse trains using time shifts of pulses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/007—Transmitting or indicating the displacement of flexible diaphragms using variations in inductance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/10—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in inductance, i.e. electric circuits therefor

Abstract

A linear displacement sensor comprises two adjacent inductive windings A1, A2 and a ferromagnetic core N movable within the windings so that in a central position the inductances are equal and at positions either side of the central position, one inductance is greater than the other. A d.c. potential VB is applied to the junction between the two windings and the potentials at the ends of the windings are applied to comparators to which are also applied the same reference voltage Vs so that each comparator produces an output signal when the potential applied thereto from a winding exceeds the reference potential. A difference in the inductance between the two windings due to displacement of the core results in the comparators producing output signals at different times t1,t2 due to the change in time constant of the windings. These signals are then processed to give a binary indication of the core displacement on a counter c which counts pulses from clock ck during the time t2-t1 between the production of the comparator output signals. <IMAGE>
GB7839663A 1977-10-12 1978-10-06 Linear displacement sensor Withdrawn GB2005844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2850577A IT1088352B (en) 1977-10-12 1977-10-12 LINEAR SHIFT DETECTOR

Publications (1)

Publication Number Publication Date
GB2005844A true GB2005844A (en) 1979-04-25

Family

ID=11223711

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839663A Withdrawn GB2005844A (en) 1977-10-12 1978-10-06 Linear displacement sensor

Country Status (5)

Country Link
DE (1) DE2844010A1 (en)
ES (1) ES474131A1 (en)
FR (1) FR2406184A1 (en)
GB (1) GB2005844A (en)
IT (1) IT1088352B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509371A1 (en) * 1981-07-10 1983-01-14 Lucas Ind Plc INDUCTIVE LINEAR TRANSDUCER
DE3210890A1 (en) * 1982-03-25 1983-09-29 Robert Bosch Gmbh, 7000 Stuttgart Circuit arrangement for inductive transmitters
DE19521531A1 (en) * 1994-06-13 1995-12-14 Honda Motor Co Ltd Inductive position-shift detector for e.g. steering torque sensor
GB2314417A (en) * 1996-06-20 1997-12-24 Moog Inc Variable-phase resistive transducer, and method of operating same
CN101592541B (en) * 2009-06-29 2011-05-04 杭州精久科技有限公司 Continuous pressure detection device for electric pressure cooker

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451566A1 (en) * 1979-03-12 1980-10-10 Effa Etudes Sarl EDGE CURRENT DISPLACEMENT SENSOR
DE3003892A1 (en) * 1980-02-02 1981-08-13 Robert Bosch Gmbh, 7000 Stuttgart PRESSURE-DEPENDENT ADJUSTMENT OF OPERATING PARAMETERS OF INTERNAL COMBUSTION ENGINES
FR2478813A1 (en) * 1980-03-21 1981-09-25 Renault PRESSURE SENSOR FOR THE INTAKE OF AN INTERNAL COMBUSTION ENGINE
US4339955A (en) * 1980-08-29 1982-07-20 Aisin Seiki Company, Ltd. Pressure sensor
US4351191A (en) * 1980-08-29 1982-09-28 Aisin Seiki Company, Limited Pressure sensor
US4339956A (en) * 1980-08-29 1982-07-20 Aisin Seiki Company, Ltd. Pressure sensor
DE3437150A1 (en) * 1984-10-10 1986-04-10 Robert Bosch Gmbh, 7000 Stuttgart VALVE
DE3713562C2 (en) * 1987-04-23 1995-10-19 Pierburg Gmbh Method for determining the position of control elements with inductive displacement sensors
DE3836080A1 (en) * 1988-10-22 1990-04-26 Wabco Westinghouse Fahrzeug BRAKE CYLINDER
DE4008151C1 (en) * 1990-03-14 1991-06-13 C.A. Weidmueller Gmbh & Co, 4930 Detmold, De Inductive sensor arrangement e.g. for workpiece parts - has current supply alternately energising coils via variable resistor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509371A1 (en) * 1981-07-10 1983-01-14 Lucas Ind Plc INDUCTIVE LINEAR TRANSDUCER
GB2121182A (en) * 1981-07-10 1983-12-14 Lucas Ind Plc Linear inductive transducer
DE3210890A1 (en) * 1982-03-25 1983-09-29 Robert Bosch Gmbh, 7000 Stuttgart Circuit arrangement for inductive transmitters
DE19521531A1 (en) * 1994-06-13 1995-12-14 Honda Motor Co Ltd Inductive position-shift detector for e.g. steering torque sensor
GB2290384A (en) * 1994-06-13 1995-12-20 Honda Motor Co Ltd Displacement detector
US5712563A (en) * 1994-06-13 1998-01-27 Honda Giken Kogyo Kabushiki Kaisha Steering torque sensor utilizing a displacement detector having a pulse power supply
GB2290384B (en) * 1994-06-13 1998-08-26 Honda Motor Co Ltd Displacement detector
DE19521531C2 (en) * 1994-06-13 1998-12-17 Honda Motor Co Ltd Stroke detector and steering torque sensor using this
GB2314417A (en) * 1996-06-20 1997-12-24 Moog Inc Variable-phase resistive transducer, and method of operating same
CN101592541B (en) * 2009-06-29 2011-05-04 杭州精久科技有限公司 Continuous pressure detection device for electric pressure cooker

Also Published As

Publication number Publication date
ES474131A1 (en) 1979-05-16
IT1088352B (en) 1985-06-10
DE2844010A1 (en) 1979-04-19
FR2406184A1 (en) 1979-05-11
FR2406184B3 (en) 1981-07-17

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)