SE9801771D0 - Method of operating an inductive position sensor for measuring linear motion and a device for carrying out the method - Google Patents

Method of operating an inductive position sensor for measuring linear motion and a device for carrying out the method

Info

Publication number
SE9801771D0
SE9801771D0 SE9801771A SE9801771A SE9801771D0 SE 9801771 D0 SE9801771 D0 SE 9801771D0 SE 9801771 A SE9801771 A SE 9801771A SE 9801771 A SE9801771 A SE 9801771A SE 9801771 D0 SE9801771 D0 SE 9801771D0
Authority
SE
Sweden
Prior art keywords
coil
transducer
current
carrying
operating
Prior art date
Application number
SE9801771A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9801771L (en
SE515975C2 (en
Inventor
Lars Dernebo
Original Assignee
Ld Design Electronics Ab
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 Ld Design Electronics Ab filed Critical Ld Design Electronics Ab
Priority to SE9801771A priority Critical patent/SE515975C2/en
Publication of SE9801771D0 publication Critical patent/SE9801771D0/en
Priority to PCT/SE1999/001372 priority patent/WO2001013070A1/en
Publication of SE9801771L publication Critical patent/SE9801771L/en
Publication of SE515975C2 publication Critical patent/SE515975C2/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

An AC current superimposed on a DC current is used as the power signal for the transducer and this signal is supplied to a current branch point in the power unit (5) for both the coil (1) and the current measuring sensor (6). The AC voltage differential over the coil is measured and used to generate a signal corresponding to the position of the transducer element (2) relative to the coil. DC voltage differential over the coil is also measured to generate a signal corresponding to the coil temperature. The control method is used to measure linear movement and compensate for temperature variations in the transducer. Constant AC and DC generators are connected to a circuit containing the transducer coil and a current measuring sensor coupled in series with the coil. An Independent claim is also included for the control unit used to carry out this method.
SE9801771A 1998-05-19 1998-05-19 Regulating power unit for linear displacement transducer in order to compensate for coil temperature variations, by measuring AC and DC voltage differential across coil SE515975C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9801771A SE515975C2 (en) 1998-05-19 1998-05-19 Regulating power unit for linear displacement transducer in order to compensate for coil temperature variations, by measuring AC and DC voltage differential across coil
PCT/SE1999/001372 WO2001013070A1 (en) 1998-05-19 1999-08-13 Method and device for driving and temperature compensating an inductive position sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9801771A SE515975C2 (en) 1998-05-19 1998-05-19 Regulating power unit for linear displacement transducer in order to compensate for coil temperature variations, by measuring AC and DC voltage differential across coil

Publications (3)

Publication Number Publication Date
SE9801771D0 true SE9801771D0 (en) 1998-05-19
SE9801771L SE9801771L (en) 1999-11-20
SE515975C2 SE515975C2 (en) 2001-11-05

Family

ID=20411382

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9801771A SE515975C2 (en) 1998-05-19 1998-05-19 Regulating power unit for linear displacement transducer in order to compensate for coil temperature variations, by measuring AC and DC voltage differential across coil

Country Status (1)

Country Link
SE (1) SE515975C2 (en)

Also Published As

Publication number Publication date
SE9801771L (en) 1999-11-20
SE515975C2 (en) 2001-11-05

Similar Documents

Publication Publication Date Title
DK372085A (en) CIRCUIT DEVICE FOR COMPENSATION OF VARIATIONS IN A TRANSFER FACTOR OF A MAGNET FIELD SENSOR
FR2785046B1 (en) MEASURING DEVICE BASED ON INDIRECT PERMITTIVITY MEASUREMENT
CA2244692A1 (en) Temperature compensated current measurement device
ATE485621T1 (en) CONTROL DEVICE WITH PULSE WIDTH MODULATION FOR A VERSATILE ELECTRICAL MACHINE AND A VERSATILE ELECTRIC MACHINE EQUIPPED WITH SUCH A CONTROL DEVICE
JPS59181903A (en) Method and device for adjusting interval of magnetic sensor from conductive reaction orbit
DE59001684D1 (en) ARRANGEMENT FOR MEASURING THE WINDING TEMPERATURE OF ELECTRICAL MACHINES.
DE3773910D1 (en) METHOD FOR DETERMINING THE VARIATIONS OF THE WALL THICKNESS OF AN ELECTRICALLY CONDUCTIVE BODY.
EP0556273A1 (en) Proximity sensing means and method
DE69905385D1 (en) APPARATUS AND METHOD FOR CURRENT MEASUREMENT
ATE214806T1 (en) ARRANGEMENT FOR TEMPERATURE COMPENSATION
DE3774712D1 (en) CRUISE CONTROL UNIT FOR A DC MOTOR WITH INTERNAL FEEDBACK.
DE50001807D1 (en) HIGH-TEMPERATURE DETECTION DEVICE AND METHOD OF MANUFACTURING THE SAME
FR2720834B1 (en) Electrical energy measuring device comprising a multiplexer.
SE9801771D0 (en) Method of operating an inductive position sensor for measuring linear motion and a device for carrying out the method
KR840006076A (en) RF power meter
DE59209274D1 (en) Arrangement for electrically isolated capacitance measurement, especially for capacitive level measurement
JPS55125424A (en) Device for watching temperature of rotor of rotary electric machine
AU3981800A (en) Current sensor
SE9804080D0 (en) Electrical measuring component and use thereof
JPS5512401A (en) Eddy current type range finder
SU1605137A1 (en) Differential transformer transducer of linear displacements
SU1212421A1 (en) Process for determining mobility of teeth
DE3472840D1 (en) Circuitry for compensating variations of the transmission factor of a linear magnetic field sensor
SU937991A1 (en) Differential inductive displacement converter
SU907403A2 (en) Device for measuring rotating object temperature

Legal Events

Date Code Title Description
NUG Patent has lapsed