WO2021142499A1 - Appareil de mesure de déplacement magnétostrictif - Google Patents

Appareil de mesure de déplacement magnétostrictif Download PDF

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Publication number
WO2021142499A1
WO2021142499A1 PCT/AT2021/060010 AT2021060010W WO2021142499A1 WO 2021142499 A1 WO2021142499 A1 WO 2021142499A1 AT 2021060010 W AT2021060010 W AT 2021060010W WO 2021142499 A1 WO2021142499 A1 WO 2021142499A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
actuator
sensor
measuring sensor
position encoder
Prior art date
Application number
PCT/AT2021/060010
Other languages
German (de)
English (en)
Inventor
Horst Leopold
Original Assignee
Horst Leopold
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 Horst Leopold filed Critical Horst Leopold
Priority to DE112021000551.0T priority Critical patent/DE112021000551A5/de
Publication of WO2021142499A1 publication Critical patent/WO2021142499A1/fr

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
    • G01D5/48—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 wave or particle radiation means
    • G01D5/485—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 wave or particle radiation means using magnetostrictive devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • 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
    • G01D5/48—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 wave or particle radiation means

Definitions

  • the invention relates to a magnetostrictive displacement measuring device with a cylindrical housing, with a measuring sensor arranged coaxially in the housing and connected to a measuring head, and with a magnetic position encoder that interacts with the measuring sensor and that moves along with the aid of an actuator that is axially displaceable in the housing and enclosing the measuring sensor of the probe is displaceable.
  • Magnetostrictive measuring devices are based on the fact that when a magnetic field running along a waveguide and coaxial to the waveguide and a magnetic field perpendicular thereto and aligned in the longitudinal direction of the waveguide are superimposed, a mechanical torsional wave is generated due to the magnetostriction and propagates in both directions along the waveguide .
  • the position of the position encoder can be determined from the transit time of the current pulse and the returning torsion wave due to the known speeds of the current pulse and the torsion wave along the waveguide serving as a measuring sensor can be determined with high resolution.
  • this flexural rod is associated with a construction effort that increases the overall length, without being able to avoid a torque load on the telescope housing.
  • measurement errors are to be accepted not only as a result of the misalignment but also as a result of the bending of the bending rod.
  • EP 3 150293 A1 In order to be able to compensate for minor misalignments between a cylinder and its piston, it is also known (EP 3 150293 A1) to have a recirculating ball bearing guide as a linear roller guide between the two housing parts of a position measuring device that are telescopically slidable into one another and are connected to the cylinder on the one hand and the piston on the other and to set the radial play of the recirculating ball bearing guide so that, despite minor misalignments, the two housing parts, which form a measuring sensor on the one hand and a position encoder on the other, run coaxially.
  • the invention is therefore based on the object of designing a magnetostrictive displacement measuring device in such a way that housing loads due to misalignment in relation to the displacement of the objects to be measured are reduced Compliance with simple design conditions can be avoided and the measurement errors caused by such misalignments can be kept comparatively small.
  • the invention solves the problem in that the actuator is mounted in the axial extent of the magnetic position encoder in a sliding sleeve that is axially displaceable in the housing, but cannot be displaced but can be swiveled to a limited extent on all sides and surrounds the sensor with swivel play.
  • the actuator is designed as a tube that receives the magnetic position encoder at one end and a connection head at the opposite end, especially since the tube only has to meet comparatively low accuracy requirements due to the spherical bearing in the sliding sleeve.
  • the construction requirements for the inclusion of the one hand due to the pipe Magnetic position encoder and on the other hand the connection head also allow extensive consideration of different installation requirements.
  • the illustrated magnetostrictive displacement measuring device has a cylindrical housing 1 with a coaxial measuring sensor 2, which is connected to a measuring head 3.
  • the measuring head 3 with the connected measuring sensor 2 is screwed into the base 4 of the cylindrical housing 1 and covered by a cap 5 which is provided with a cable bushing 6.
  • a sliding sleeve 7 is guided axially displaceably within the housing 1 and is provided with a spherical bearing 8 for an actuator 9, which is held within the spherical bearing 8 so as to be non-displaceable but pivotable to a limited extent on all sides.
  • the spherical bearing 8, the center of which lies in the housing axis or in the axis of the measuring sensor 2, comprises a spherical bearing body 10 belonging to the actuator 9 and a spherical bearing socket 11 which receives the bearing body 10 and which is arranged in the sliding sleeve 7.
  • the actuator 9 is designed as a tube 12 which surrounds the sensor 2 at a radial distance.
  • a magnetic position encoder 13 in the form of a ring magnet is inserted into the tube 12, which is held in contact with an inner shoulder 15 of the tube 12 by means of a clamping ring 14.
  • the arrangement is such that the center point of the spherical bearing 8 lies at least approximately in the center plane of the ring magnet forming the position encoder 13.
  • the actuator 9 is spherically supported in the axial extent of the magnetic position encoder 13 in a sliding sleeve 7 guided axially displaceably in the housing 1, the measurement errors caused by pivoting the actuator 9 relative to the housing 1 remain small, and over the entire measuring range, regardless of the respective axial position of the actuator 9 with respect to the measuring sensor 2.
  • the housing 1 is rigidly attached to the other test object by means of a connection flange 16, for example, and a connection head 18 screwed into the tube 12 and secured in position by a locking nut 17.
  • the connection head 18 is connected to the housing 1 by a bellows 19, which does not impair either the displaceability or the pivotability of the actuator 9 for the magnetic position encoder 13 formed by the tube 12.
  • the spherical bearing 8 makes it possible to compensate for the misalignment, with comparatively small measuring errors, because the actuator 9 compared to the measuring sensor 2 is in the axial extent of the magnetic position encoder 13 is pivoted and in the area of the spherical bearing 8 an at least approximately concentric position of the measuring sensor 2 with respect to the ring magnet of the position encoder 13 can be ensured regardless of any angular positions between the housing 1 and the actuator 9.

Landscapes

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

Abstract

L'invention concerne un appareil de mesure de déplacement magnétostrictif, comprenant : un logement cylindrique (1) ; un capteur (2), qui est coaxialement disposé dans le logement (1) et qui est relié à une tête de mesure (3) ; et un indicateur de position magnétique (13), qui coopère avec le capteur (2) et qui peut coulisser le long du capteur (2) au moyen d'un actionneur (9), ledit actionneur étant monté pour axialement coulisser dans le logement (1) et entourant le capteur (2). Selon l'invention, afin de créer des conditions de conception avantageuses, l'actionneur (9), dans la zone axiale de l'étendue de l'indicateur de position magnétique (13), ne peut pas coulisser dans un manchon coulissant (7) guidé de manière axiale et coulissante dans le logement (1), mais est monté de façon à pouvoir pivoter de manière limitée sur tous les côtés et entoure le capteur (2) à l'aide d'un jeu pivotant.
PCT/AT2021/060010 2020-01-16 2021-01-13 Appareil de mesure de déplacement magnétostrictif WO2021142499A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112021000551.0T DE112021000551A5 (de) 2020-01-16 2021-01-13 Magnetostriktive Wegmesseinrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50029/2020 2020-01-16
ATA50029/2020A AT523054B1 (de) 2020-01-16 2020-01-16 Magnetostriktive Wegmesseinrichtung

Publications (1)

Publication Number Publication Date
WO2021142499A1 true WO2021142499A1 (fr) 2021-07-22

Family

ID=74186366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2021/060010 WO2021142499A1 (fr) 2020-01-16 2021-01-13 Appareil de mesure de déplacement magnétostrictif

Country Status (3)

Country Link
AT (1) AT523054B1 (fr)
DE (1) DE112021000551A5 (fr)
WO (1) WO2021142499A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1001247A2 (fr) 1998-11-09 2000-05-17 Sms Schloemann-Siemag Aktiengesellschaft Indicateur de position pour mesurer le chemin de mise en prise d'élévation du rouleau d'une charpente de laminoir
DE10337599A1 (de) * 2003-08-16 2005-03-10 Festo Ag & Co Kg Kontraktionseinheit mit Positionserfassungseinrichtung
EP3150293A1 (fr) 2015-09-30 2017-04-05 Primetals Technologies Austria GmbH Dispositif de mesure de trajectoire pour un cylindre hydraulique
WO2019064269A1 (fr) * 2017-09-28 2019-04-04 Mts Sensor Technologie Gmbh&Co.Kg Capteur courbé de transducteur de position

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6232769B1 (en) * 1998-06-16 2001-05-15 Balluff, Inc. Modular waveguide assembly for a position sensor and method for making the same
WO2016128021A1 (fr) * 2015-02-09 2016-08-18 Balluff Gmbh Dispositif de mesure de position magnétostrictif
DE102016120468A1 (de) * 2016-10-26 2018-04-26 Balluff Gmbh Magnetostriktive Wegmessvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1001247A2 (fr) 1998-11-09 2000-05-17 Sms Schloemann-Siemag Aktiengesellschaft Indicateur de position pour mesurer le chemin de mise en prise d'élévation du rouleau d'une charpente de laminoir
DE10337599A1 (de) * 2003-08-16 2005-03-10 Festo Ag & Co Kg Kontraktionseinheit mit Positionserfassungseinrichtung
EP3150293A1 (fr) 2015-09-30 2017-04-05 Primetals Technologies Austria GmbH Dispositif de mesure de trajectoire pour un cylindre hydraulique
WO2019064269A1 (fr) * 2017-09-28 2019-04-04 Mts Sensor Technologie Gmbh&Co.Kg Capteur courbé de transducteur de position

Also Published As

Publication number Publication date
DE112021000551A5 (de) 2022-10-27
AT523054A4 (de) 2021-05-15
AT523054B1 (de) 2021-05-15

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