WO2019057237A1 - Ensemble de mesure d'une force ou d'un couple comportant un capteur de champ magnétique et un manchon - Google Patents

Ensemble de mesure d'une force ou d'un couple comportant un capteur de champ magnétique et un manchon Download PDF

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Publication number
WO2019057237A1
WO2019057237A1 PCT/DE2018/100753 DE2018100753W WO2019057237A1 WO 2019057237 A1 WO2019057237 A1 WO 2019057237A1 DE 2018100753 W DE2018100753 W DE 2018100753W WO 2019057237 A1 WO2019057237 A1 WO 2019057237A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
machine element
arrangement
magnetization
arrangement according
Prior art date
Application number
PCT/DE2018/100753
Other languages
German (de)
English (en)
Inventor
Andreas Moellmann
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2019057237A1 publication Critical patent/WO2019057237A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
    • G01L1/125—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using magnetostrictive means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means

Definitions

  • the present invention relates to an arrangement for measuring a force and / or torque on a machine element.
  • the arrangement comprises a sleeve arranged on the machine element, which has a magnetization area for a magnetization.
  • the arrangement further comprises at least one
  • Magnetic field sensor which is arranged opposite the sleeve. The measurement of the force and / or the moment takes place using the inverse-magnetostrictive effect.
  • EP 2 365 927 B1 shows a bottom bracket with two cranks and with one
  • Chainring carrier which is connected to a shaft of the bottom bracket.
  • Sprocket carrier is rotatably connected to a chainring shaft, which in turn is rotatably connected to the shaft.
  • the sprocket shaft has a section on a magnetization.
  • Magnetization detected at a present in the range of the magnetization torque is Magnetization detected at a present in the range of the magnetization torque.
  • US 6,490,934 B2 teaches a magnetoelastic torque sensor for measuring a torque, which refers to an element with a
  • ferromagnetic, magnetostrictive and magnetoelastically active region acts. This area is formed in a transducer, which sits as a cylindrical sleeve, for example on a shaft. The torque sensor faces the transducer.
  • US 8,087,304 B2 teaches a magnetoelastic torque sensor in which the influence of an external magnetic field is to be suppressed.
  • the torque sensor comprises three individual magnetic field sensors, the
  • US 6,301,946 B1 shows a tape winding method in which a tape arriving from a hot rolling mill is cut by a tape cutter to a predetermined length.
  • the cut strip is wound alternately by a mandrel of a first winder and a mandrel of a second winder, via winding nip rolls arranged on the discharge side of the strip shear.
  • a torque sensor which comprises a magnetoelastic transducer, which has a
  • a shaft can be set in rotation so that a tangential magnetic field is generated in the shaft by a permanent magnet or by a coil.
  • the transducer in the form of a ring can also be polarized in that an electrical conductor is threaded through the shaft or through the ring and energized, the ring may be partially immersed in an electrically conductive liquid.
  • a sensor can be arranged with a yoke opposite to the magnetoelastic transducer.
  • the object of the present invention is to provide an improved arrangement for measurement of force and / or torque on a sleeve-provided machine element based on the inverse-magnetostrictive effect.
  • the arrangement according to the invention is used to measure a force and / or a moment on a machine element using the inverse-magnetostrictive effect.
  • the force or the moment acts on the machine element, which causes it to mechanical stresses comes and the machine element usually slightly deformed.
  • the machine element extends in one axis.
  • the axis preferably forms an axis of rotation of the machine element. By the axis are defined a radial direction, a tangential or circumferential direction and an axial direction, which are aligned perpendicular to each other.
  • the arrangement comprises a sleeve arranged on the machine element.
  • the sleeve sits on the machine element.
  • the machine element extends through an interior of the sleeve.
  • the sleeve has a magnetization region for a magnetization formed in the sleeve.
  • the magnetization region preferably extends circumferentially around the axis.
  • the magnetization region preferably extends circumferentially within a material of the sleeve.
  • Magnetization region preferably extends along a closed path around the axis.
  • the magnetization region forms a primary sensor for determining the force or moment.
  • the arrangement further comprises at least one magnetic field sensor, which is arranged opposite the sleeve.
  • the magnetic field sensor forms a
  • the primary sensor d. H. the magnetization area serves to convert the force to be measured or the moment to be measured into a corresponding magnetic field, while the secondary sensor enables the conversion of this magnetic field into electrical signals.
  • the sleeve is fastened in two axially spaced attachment areas in each case by at least one attachment to the machine element, so that the force to be measured or the moment to be measured of the
  • Machine element is transferred to the sleeve. Axial between the
  • Attachment areas is an intermediate region formed in which the sleeve is rotatably mounted on the machine element, since no attachment of the sleeve is formed on the machine element in the intermediate region.
  • the sleeve is not freely rotatable relative to the machine element because of the at least two fasteners, however, it can be freely elastically deformed in the intermediate region by a rotation between the two attachment areas.
  • a particular advantage of the arrangement according to the invention is that mechanical stresses of the machine element are transferred to a high degree proportional to the sleeve, since the sleeve can deform freely in the intermediate region, so that an undesirable hysteresis is avoided.
  • the sleeve sits in
  • the precisely fitting seat allows the rotatability of the sleeve in the
  • Machine element to be formed.
  • the first group more preferred
  • Embodiments have the advantage that the sleeve can not deform when attached to the machine element, so that the first group of preferred embodiments is particularly suitable for thin-walled sleeves whose wall thickness is at most 1 mm.
  • the sleeve is in
  • the second group of preferred embodiments has the advantage that the magnetic flux to be measured with the magnetic field sensor is enhanced because the magnetic flux inside the unit formed by the sleeve and by the machine element is reduced.
  • the sleeve is in
  • the intermediate region circumferentially is evenly spaced from the machine element, so that the circumferential gap formed between the sleeve and the machine element in the intermediate region is constant in the axial direction and in the circumferential direction.
  • the circumferential gap thus has the shape of a hollow cylinder.
  • the sleeve is arranged coaxially to the machine element preferably cylindrical in the intermediate region.
  • the sleeve in the attachment areas preferably each have a circumferential radially inwardly directed shoulder, with which it sits on the machine element.
  • Fasteners of the sleeve on the machine element are each formed between the shoulders and the machine element.
  • the two paragraphs preferably form the axial ends of the sleeve.
  • the attachment portions of the sleeve are preferably formed at the axial ends of the sleeve.
  • the intermediate region is axially preferably axially centrally relative to the sleeve and extends over an axial length, which is preferably at least half and more preferably at least two-thirds of the axial length of the sleeve.
  • the attachment portions of the sleeve preferably extend circumferentially about the axis.
  • the attachment regions of the sleeve preferably each have the shape of a hollow cylinder, which is formed on the preferably cylindrical
  • the sleeve is preferably in the attachment areas in each case by a
  • solder connection attached to the machine element.
  • the two solder joints preferably extend fully around the machine element, so that the sleeve is fully secured by the respective solder joint on the machine element.
  • the two solder joints are preferably each formed by a Laserhartlöteur. The attachment by laser brazing is safe and little effort.
  • the sleeve preferably has in the two attachment regions in each case a radially inwardly directed Lötfase, which is preferably formed completely circumferentially.
  • the two Lötfasen are preferably at the two axial ends of the sleeve
  • the two Lötfasen are preferably formed on radial inner sides of the two axial ends of the sleeve.
  • the two circumferential Lötfasen point each prefers a hollow truncated cone shape.
  • the Lötfasen are preferably formed in embodiments of the sleeve whose wall thickness is more than 1 mm.
  • the magnetization region can be permanently or temporarily magnetized.
  • the inventive arrangement is the
  • Magnetization area permanently magnetized, so that the magnetization is formed by a permanent magnetization.
  • Embodiments of the arrangement according to the invention further comprise at least one magnet for magnetizing the magnetization region, so that the magnetization of the magnetization region is basically temporary.
  • the at least one magnet may be formed by at least one permanent magnet or preferably by an electromagnet.
  • the permanently or temporarily magnetized magnetization region is in a state of the sleeve or of the sleeve which is unloaded by a force or moment
  • the permanently or temporarily magnetized magnetization region is preferably formed in a magnetoelastic section of the sleeve.
  • the sleeve preferably consists of a magnetostrictive material which is magnetically hard or magnetically semi-hard.
  • the at least one magnetization region preferably has a high
  • the sleeve is designed as such magnetoelastic.
  • the sleeve consists of a magnetostrictive material, in particular of a magnetostrictive steel.
  • the machine element does not have to consist of a material which has special properties in connection with that on the
  • the sleeve and the machine element made of different materials; preferably made of different steels.
  • the at least one magnetization region represents a part of the volume of the sleeve.
  • the magnetization region is preferably annular, wherein the axis of the sleeve and of the machine element also forms a central axis of the ring shape.
  • the magnetization region has the shape of a hollow cylinder coaxial with the axis of the sleeve or of the machine element.
  • the magnetization region preferably extends axially within the
  • the magnetization area does not have to be in the
  • Attachment areas extend, so that the magnetization region preferably extends only axially within the intermediate region.
  • the magnetic field sensor elements are preferably each formed by a receiver coil or by a semiconductor sensor element.
  • the receiver coils and the semiconductor sensor elements convert the received magnetic field into an electrical signal.
  • the at least one magnetic field sensor is preferably formed by a forester probe, by a fluxgate magnetometer, by a Hall sensor, by a coil or by a semiconductor sensor.
  • another type of sensor can also be used insofar as it is suitable for measuring the magnetic field produced by the inverse-magnetostrictive effect.
  • the machine element preferably has the shape of a prism or a cylinder, wherein the prism or the cylinder is arranged coaxially to the axis.
  • the prism or the cylinder is preferably straight.
  • the machine element in the form of a right circular cylinder which is arranged coaxially to the axis.
  • the prism or the cylinder is conical.
  • the machine element may also be hollow.
  • the machine element is preferably formed by a shaft, by an axle, by a gear part, by a shift fork or by a flange.
  • the shaft, the axle, the gear part, the shift fork or the flange can be designed for loads by different forces and moments and, for example, a Component of an electric vehicle, a hybrid vehicle, a differential, a sensor bottom bracket, a roll stabilizer or a fertilizer spreader.
  • the machine element can also be formed by completely different types of hollow machine elements.
  • Fig. 1 shows a first preferred embodiment of an inventive
  • Fig. 2 shows a second preferred embodiment of the invention
  • Fig. 3 shows a third preferred embodiment of the invention
  • Fig. 4 shows a fourth preferred embodiment of the invention
  • Fig. 1 shows a first preferred embodiment of an inventive
  • the arrangement according to the invention is used to measure a torque which acts on a machine element in the form of a shaft 01.
  • the shaft 01 has an axis 02 in which the shaft 01 extends.
  • a sleeve 03 fits snugly on the shaft 01.
  • the sleeve 03 consists of a magnetoelastic material which has the inverse-magnetostrictive effect.
  • the sleeve 03 is attached to the shaft 01 in each case with a circumferential solder connection 06.
  • Solder joints 06 are formed on the lateral end faces of the sleeve 03.
  • an intermediate region 07 is axially between the two attachment areas 04 the sleeve 03 is not attached to the shaft 01, but sits snugly and rotatably on the shaft 01. If the shaft 01 is deformed for example by a torque acting in the axis 02, so on the sleeve 03 is transmitted via the two mounting portions 04 on the torque so that the sleeve 03 deforms. in the
  • the sleeve 03 has within the intermediate region 07 a
  • Permanent magnetization region 08 in which the sleeve 03
  • the permanent magnetization region 08 extends completely circumferentially about the axis 02, so that it has an annular
  • the arrangement further comprises a magnetic field sensor (not shown), which is arranged opposite the sleeve 03.
  • the sleeve 03 has a wall thickness of at most 1 mm.
  • Fig. 2 shows a second preferred embodiment of the invention
  • This second embodiment is initially similar to the first embodiment shown in FIG.
  • the wall thickness of the sleeve 03 is more than 1 mm.
  • Another difference made possible by the greater wall thickness is that the sleeve 03 in the attachment areas 04 at their axial ends in each case has a circumferential Lötfase 09.
  • the Lötfasen 09 are directed radially inwardly obliquely.
  • the solder joints 06 are substantially in the Lötfasen 09
  • Fig. 3 shows a third preferred embodiment of the invention
  • This third embodiment initially resembles the first embodiment shown in FIG.
  • the sleeve 03 in the intermediate region 07 is circumferentially spaced from the shaft 01, so that between the interior of the sleeve 03 and the shaft 01 a circumferential gap 1 1 is formed.
  • the attachment areas 04 each have a circumferential radially inwardly directed shoulder 12.
  • Fig. 4 shows a fourth preferred embodiment of the invention
  • This fourth embodiment is initially similar to the third embodiment shown in FIG.
  • the wall thickness of the sleeve 03 is more than 1 mm.
  • Another difference made possible by the greater wall thickness is that the sleeve 03 in the attachment areas 04 at their axial ends in each case has a circumferential Lötfase 09.
  • the Lötfasen 09 are directed radially inwardly obliquely.
  • the solder joints 06 are substantially in the Lötfasen 09

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

La présente invention concerne un ensemble de mesure d'une force et/ou d'un couple au niveau d'un élément de machine (01). L'ensemble comprend un manchon (03) qui est disposé sur l'élément de machine (01) et qui comporte une région de magnétisation (08) destinée à la magnétisation. L'ensemble comprend en outre au moins un capteur de champ magnétique qui est disposé en face du manchon (03). Selon l'invention, le manchon (03) est fixé à l'élément de machine (01) dans deux régions de fixation (04) espacées axialement. Une région intermédiaire (07), dans laquelle le manchon (03) est monté à rotation sur l'élément de machine (01), est formée axialement entre les régions de fixation (04).
PCT/DE2018/100753 2017-09-21 2018-09-05 Ensemble de mesure d'une force ou d'un couple comportant un capteur de champ magnétique et un manchon WO2019057237A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017121863.7 2017-09-21
DE102017121863.7A DE102017121863A1 (de) 2017-09-21 2017-09-21 Anordnung zur Messung einer Kraft oder eines Momentes mit einem Magnetfeldsensor und einer Hülse

Publications (1)

Publication Number Publication Date
WO2019057237A1 true WO2019057237A1 (fr) 2019-03-28

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Application Number Title Priority Date Filing Date
PCT/DE2018/100753 WO2019057237A1 (fr) 2017-09-21 2018-09-05 Ensemble de mesure d'une force ou d'un couple comportant un capteur de champ magnétique et un manchon

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Country Link
DE (1) DE102017121863A1 (fr)
WO (1) WO2019057237A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020109607A1 (de) 2020-04-07 2021-10-07 Schaeffler Technologies AG & Co. KG Drehmomentsensor und Drehmomentsensoranordnung
DE102020117009A1 (de) 2020-06-29 2021-12-30 Schaeffler Technologies AG & Co. KG Anordnung zur Erfassung eines Drehmoments an einem Maschinenelement und Fahrzeug mit einer solchen Anordnung
DE102020117007A1 (de) 2020-06-29 2021-12-30 Schaeffler Technologies AG & Co. KG Anordnung zur Erfassung eines Drehmoments an einem Maschinenelement und Fahrzeug mit einer solchen Anordnung
DE102020120668A1 (de) 2020-08-05 2022-02-10 Schaeffler Technologies AG & Co. KG Drehmomentsensor auf Basis inversiver Magnetostriktion
DE102020120672A1 (de) 2020-08-05 2022-02-10 Schaeffler Technologies AG & Co. KG Magnetoelastischer Drehmomentsensor mit einer magnetisierten Hülse als Primärsensor
DE102020121269A1 (de) 2020-08-13 2022-02-17 Schaeffler Technologies AG & Co. KG Magnetoelastische Sensorvorrichtung sowie Antriebsstrang mit der Sensorvorrichtung
DE102020122116A1 (de) 2020-08-25 2022-03-03 Schaeffler Technologies AG & Co. KG Drehmomentsensor auf Basis inversiver Magnetostriktion
DE102021123800A1 (de) 2021-09-15 2023-03-16 Schaeffler Technologies AG & Co. KG Drehmomentsensor
DE102022105883A1 (de) 2022-03-14 2023-09-14 Melectric Systems GmbH Autarke messvorrichtung zur drehmomentmessung mittels magnetostriktion

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465627A (en) 1991-07-29 1995-11-14 Magnetoelastic Devices, Inc. Circularly magnetized non-contact torque sensor and method for measuring torque using same
US5880379A (en) * 1997-03-25 1999-03-09 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Torque sensor installing method
US6301946B1 (en) 1998-03-27 2001-10-16 Kawasaki Steel Corporation Strip coiling method
US6439066B1 (en) * 1996-08-14 2002-08-27 Peter Norton Torque sensor
EP0803053B1 (fr) 1994-06-02 2002-08-28 Magna-Lastic Devices, Inc. Capteur de couple sans contact a magnetisation circulaire et methode de mesure d'un couple en utilisant ce capteur
US8087304B2 (en) 2008-03-14 2012-01-03 Seong-Jae Lee Magnetoelastic torque sensor with ambient field rejection
EP2365927B1 (fr) 2008-10-02 2013-04-24 Schaeffler Technologies AG & Co. KG Pedalier
DE102015200268B3 (de) 2015-01-12 2016-06-09 Schaeffler Technologies AG & Co. KG Anordnung zur Messung einer Kraft oder eines Momentes mit einem Magnetfeldsensor und mit einem Magnetfeldleitelement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465627A (en) 1991-07-29 1995-11-14 Magnetoelastic Devices, Inc. Circularly magnetized non-contact torque sensor and method for measuring torque using same
US6490934B2 (en) 1991-07-29 2002-12-10 Magnetoelastic Devices, Inc. Circularly magnetized non-contact torque sensor and method for measuring torque using the same
EP0803053B1 (fr) 1994-06-02 2002-08-28 Magna-Lastic Devices, Inc. Capteur de couple sans contact a magnetisation circulaire et methode de mesure d'un couple en utilisant ce capteur
US6439066B1 (en) * 1996-08-14 2002-08-27 Peter Norton Torque sensor
US5880379A (en) * 1997-03-25 1999-03-09 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Torque sensor installing method
US6301946B1 (en) 1998-03-27 2001-10-16 Kawasaki Steel Corporation Strip coiling method
US8087304B2 (en) 2008-03-14 2012-01-03 Seong-Jae Lee Magnetoelastic torque sensor with ambient field rejection
EP2365927B1 (fr) 2008-10-02 2013-04-24 Schaeffler Technologies AG & Co. KG Pedalier
DE102015200268B3 (de) 2015-01-12 2016-06-09 Schaeffler Technologies AG & Co. KG Anordnung zur Messung einer Kraft oder eines Momentes mit einem Magnetfeldsensor und mit einem Magnetfeldleitelement

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Publication number Publication date
DE102017121863A1 (de) 2019-03-21

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