WO2016112901A1 - Dispositif de mesure d'une force ou d'un couple pourvu d'un capteur de champ magnétique et d'un élément conducteur de champ magnétique - Google Patents

Dispositif de mesure d'une force ou d'un couple pourvu d'un capteur de champ magnétique et d'un élément conducteur de champ magnétique Download PDF

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Publication number
WO2016112901A1
WO2016112901A1 PCT/DE2016/200003 DE2016200003W WO2016112901A1 WO 2016112901 A1 WO2016112901 A1 WO 2016112901A1 DE 2016200003 W DE2016200003 W DE 2016200003W WO 2016112901 A1 WO2016112901 A1 WO 2016112901A1
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WO
WIPO (PCT)
Prior art keywords
magnetic field
magnetization
machine element
field sensors
magnetic
Prior art date
Application number
PCT/DE2016/200003
Other languages
German (de)
English (en)
Inventor
Stephan Neuschaefer-Rube
Jan Matysik
Christian Mock
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 WO2016112901A1 publication Critical patent/WO2016112901A1/fr

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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 moment on a machine element extending in an axis.
  • the arrangement comprises a magnetic field sensor which, together with a magnetic field guide element, faces a magnetization region on the machine element. 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 a chainring carrier, which is connected to a shaft of the bottom bracket.
  • the chainring 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.
  • a sensor is provided which detects a change in the magnetization at a torque present in the region of the magnetization.
  • No. 6,490,934 B2 teaches a magnetoelastic torque sensor for measuring a torque which acts on an element with a ferromagnetic, magnetostrictive and magnetoelastically active region. This area is formed in a transducer, which sits as a cylindrical sleeve, for example on a shaft.
  • the torque sensor faces the transducer and preferably includes a yoke, which consists of two rectangular segments and is intended to ensure that the magnetic flux originating from the transducer is efficiently conducted into the torque sensor.
  • a torque sensor which comprises a magnetoelastic transducer.
  • the transducer sits as a cylindrical sleeve on a shaft.
  • the torque sensor preferably comprises a yoke, which consists of two rectangular segments.
  • the yoke is intended to conduct the magnetic flux to the torque sensor.
  • 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 which oppose differently oriented circulating magnetizations.
  • DE 10 2012 211 000 A1 relates to an arrangement for measuring a force and / or a moment on a machine element extending in an axis.
  • the machine element has a permanent magnetization which is aligned in the axis or radially to the axis, and whose magnetic field caused by the force and / or by the moment can be measured by a magnetic field sensor.
  • the object of the present invention is to increase the accuracy of the measurement of forces and / or moments on the basis of the inverse-magnetostrictive effect, without having to use a more complex sensor.
  • the above object is achieved by an arrangement according to the appended claim 1.
  • the arrangement according to the invention serves to measure a force and / or a moment on a machine element extending in an axis.
  • the force or the moment acts on the machine element, which leads to mechanical stresses and the machine element usually deforms slightly.
  • the axis preferably forms an axis of rotation of the machine element.
  • the machine element has at least two magnetization areas extending circumferentially about the axis for a magnetization formed in the machine element. It is thus a plurality of magnetization areas revolving around the axis, wherein the axis itself preferably does not form part of the magnetization areas.
  • the magnetization regions each have a tangential orientation with respect to a surface of the machine element extending around the axis.
  • the magnetization regions preferably each have exclusively a tangential orientation with respect to one the axis extending surface of the machine element on.
  • the magnetization regions preferably each extend along a closed path around the axis, the respective magnetization region being allowed to have short gaps.
  • the magnetization regions each form a primary sensor for determining the force or the moment.
  • the magnetization regions can also be regarded as traces of magnetization because of their circumferential formation.
  • the arrangement further comprises at least two magnetic field sensors which each form a secondary sensor for determining the force or the moment.
  • the primary sensors, d. H. the magnetization regions are used to convert the force to be measured or the moment to be measured into a corresponding magnetic field, while the secondary sensors allow the conversion of this magnetic field into electrical signals.
  • the magnetic field sensors each face one of the magnetization regions, so that they are each located at the same axial position as the associated magnetization region. Thus, the magnetic field sensors are radially offset from the magnetization regions.
  • the magnetic field sensors are each designed to measure at least one component of a magnetic field caused by the magnetization and by the force and / or by the moment.
  • the suitability of the magnetic field sensors for measuring the at least one component of the magnetic field can be formed directly or indirectly.
  • the named magnetic field occurs due to the inverse magnetostrictive effect.
  • a magnetic field conducting element is arranged in each case between two adjacent ones of the plurality of magnetic field sensors.
  • the respective magnetic field guiding element is arranged in two magnetic circuits; namely in the two magnetic circuits, which are each formed by the two adjacent ones of the plurality of magnetic field sensors with the respectively associated magnetization regions.
  • the one magnetic field guiding element or the plurality of magnetic field guiding elements respectively reduce the magnetic resistance between the magnetic field sensors and the respective associated magnetizing regions.
  • the at least one magnetic field guiding element is magnetically coupled to the two of the plurality of magnetic field sensors between which it is arranged, and preferably also mechanically connected to these.
  • the at least one magnetic field guiding element with the two of the plurality of magnetic field sensors, between which it is arranged is magnetically coupled, but mechanically firmly connected to the machine element.
  • a particular advantage of the arrangement according to the invention is that the signal-to-noise ratio of a measurement based on the inverse-magnetostrictive effect can be significantly increased by means of simple components.
  • the circumferential magnetization areas are axially to each other
  • the respectively adjacent polarities of the magnetization regions preferably have opposite polarities, so that the polarity of the magnetization changes between the magnetization regions.
  • the magnetization regions can be permanently or temporarily magnetized.
  • the magnetization regions are permanently magnetized, so that the magnetization is formed by a permanent magnetization.
  • the magnetization regions preferably consist of a magnetically hard or magnetically semi-hard material.
  • this further comprises a magnet for magnetizing the magnetization regions, so that the magnetization of the magnetization regions is basically temporary.
  • the magnet may be formed by a permanent magnet or preferably by an electromagnet.
  • the magnetization regions which are permanently or temporarily magnetized are preferably magnetically neutral in a state of the machine element which is unloaded by a force or by a moment outside the magnetization region, so that no technically relevant magnetic field outside the magnetization regions can be measured.
  • the magnetization areas preferably each represent a part of the volume of the machine element, so that they each form an integral part of the machine element.
  • the magnetization elements are preferably not applied as an additional component on the machine element, although this is fundamentally possible borrowed.
  • the magnetization regions are preferably each formed individually in an axial section of the machine element.
  • the magnetization regions are preferably each annular, wherein the axis of the machine element also forms a central axis of the respective ring shape.
  • the magnetization regions each have the shape of a hollow cylinder coaxial with the axis of the machine element.
  • the magnetic field sensors preferably have an equal distance from the axis of the machine element. In principle, the magnetic field sensors can be arranged outside the machine element or even within a cavity of the machine element, for example when the machine element is formed by a hollow shaft.
  • exactly one of the magnetic field is arranged between each two axially adjacent magnetic field sensors.
  • the adjacent magnetic field sensors are preferably adjacent to each other in the axial direction, i. H. they each have the same local component in the radial direction and in the tangential direction and differ only in their local component in the axial direction.
  • the respective magnetic field guiding element is preferably located axially between the two axially adjacent ones of the plurality of magnetic field sensors.
  • each final magnetic field guiding element is arranged axially next to those of the magnetic field sensors which are not adjacent to a further magnetic field sensor on this axial side.
  • These further final magnetic field guiding elements are preferably the same as the magnetic field guiding element or the like Magnetic magnetic elements between the magnetic field sensors magnetically coupled to the respective magnetic field sensor.
  • the axially juxtaposed arrangement of the magnetic field sensors and the at least one magnetic field guiding element can also be described by the fact that the magnetic field sensors and the at least one magnetic field guiding element form a rod-shaped arrangement in which the magnetic field sensors and the one magnetic field guiding element or the plurality of magnetic field guiding elements are arranged alternately.
  • the rod-shaped arrangement is preferably aligned parallel to the axis.
  • the rod-shaped arrangement ends at its two ends in each case with one of the further final magnetic field guiding elements.
  • a particularly preferred embodiment of the arrangement according to the invention comprises exactly two of the magnetization regions, exactly two of the magnetic field sensors, exactly one of the magnetic field guiding elements between the two magnetic field sensors and one of the further final magnetic field sensors on the axial sides of the two magnetic field sensors, to which these do not form another magnetic field sensor are adjacent.
  • a further particularly preferred embodiment of the inventive arrangement comprises exactly three of the magnetization regions, exactly three of the magnetic field sensors, exactly two of the magnetic field between the three magnetic field sensors and each of the other final magnetic field sensors on the axial sides of the two outer magnetic field sensors on which these no further Magnetic field sensor are adjacent.
  • the arrangement according to the invention can also comprise more than three of the magnetization regions and more than three of the magnetic field sensors.
  • each of the magnetization regions faces at least one of the magnetic field sensors.
  • each of the magnetization regions faces exactly one of the magnetic field sensors, so that the number of magnetization regions is equal to the number of magnetic field sensors.
  • each of the magnetization regions has an equal number of magnetic field sensors so that the number of magnetic field sensors is a whole multiple of the number of magnetization regions.
  • the one magnetic field guide element or the plurality of magnetic field guide elements are preferably each arranged in an axial section which is located axially between two adjacent ones of the magnetization regions and which is not designed for magnetization.
  • the machine element preferably has no magnetization.
  • These axial sections preferably have a same axial length.
  • the possibly existing further final magnetic field guiding elements are preferably located in axial sections in which the machine element has no magnetization.
  • the at least one magnetic field guiding element and the optionally present further closing magnetic field conducting elements can also protrude into those axial sections in which the magnetizing regions are arranged, so that magnetic field sensors designed to be axially short can be used.
  • the at least one magnetic field guide element and, if appropriate, the further terminating magnetic field guide elements preferably have a distance in the radial direction to the magnetization regions that is less than the distance in the radial direction between the magnetic field sensors and the magnetization regions.
  • the at least one magnetic field guiding element and optionally the further closing magnetic field guiding elements preferably each have a machine element boundary surface which faces the machine element or with which the respective magnetic field guiding element adjoins the machine element.
  • the machine element interface can also serve as a mounting surface for attaching the respective magnetic field guiding element on the machine element.
  • the one magnetic field guiding element or the plurality of magnetic field guiding elements preferably each have two axially lateral sensor boundary surfaces adjoining each one of the two adjacent magnetic field sensors or with which the respective magnetic field guiding element faces one of the two adjacent magnetic field sensors.
  • the possibly existing two further final magnetic field Control elements preferably each have an axially lateral sensor interface, to which the respective one of the two outer magnetic field sensors adjoins or with which the respective magnetic field guiding element faces the respective one of the two outer magnetic field sensors.
  • the sensor interfaces may also be formed within a single element, which comprises at least the respective magnetic field guiding element and a part of the respective magnetic field sensor. In this case, the sensor interfaces each represent a cross section.
  • An air gap is preferably formed between the machine element and the machine element surfaces in each case.
  • an air gap is formed in each case between the magnetic field sensors and the sensor boundary surfaces.
  • the one or more air gaps are preferably each smaller than 5 mm and more preferably smaller than 1 mm.
  • the one or more air gaps are preferably filled with a magnetically conductive fluid.
  • the magnetically conductive fluid is preferably formed by a ferrofluid.
  • the machine element interfaces preferably run parallel to the opposite section of the machine element, so that the magnetic field guide elements conform to the surface of the machine element.
  • the machine element boundary surfaces are preferably each arcuate in order to adapt to the surface of the machine element.
  • the machine element boundary surfaces are each designed in the form of a cylinder jacket segment in order to extend parallel to the cylinder-shaped or hollow-cylindrical machine element.
  • the sensor interfaces are preferably formed in each case rectangular or elliptical. Particularly preferably, the sensor interfaces are each formed square or circular.
  • the machine element interface or the machine element interfaces are preferably each larger than the sensor interfaces.
  • the machine element boundary surface or the machine element boundary surfaces are each several times as large as the sensor boundary surfaces.
  • the machine element interface or the machine element interfaces are each at least at least five times the size of the sensor interfaces. This size configuration also makes it possible to use spatially small magnetic field sensors and to introduce the magnetic flux received by the magnetic field guide elements into the magnetic field sensors in a concentrated manner.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably designed in each case as a pole shoe.
  • the function of the magnetic field guide elements designed as pole shoes is comparable to the function of a pole shoe of an electric motor.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably horn-shaped.
  • the surface of the at least one magnetic field guide element extending from the machine element boundary surface to the sensor boundary surfaces has no cracks and more preferably also no corners or edges. Consequently, the surface of the at least one magnetic field guiding element extending from the machine element boundary surface to the sensor boundary surfaces can preferably be described by a continuous multi-dimensional function.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably made of a soft magnetic material and are preferably ferromagnetic.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably unmagnetised.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably mechanically fixedly connected to the magnetic field sensors.
  • the magnetic field guiding elements can be firmly connected to the machine element.
  • the at least one magnetic field guide element is annular and extends around the cylindrical machine element around or within the cavity of the hollow cylindrical Maschinenelemen- tes.
  • the ring shape is arranged coaxially with the axis of the machine element.
  • Ring shape can be interrupted.
  • the annular shape is in each case parallel to those axial sections of the machine element which are located axially between the magnetization regions.
  • the magnetic field sensors each comprise at least one coil on a coil core, which is preferably axially aligned. Axially between the coil cores of two adjacent of the magnetic field sensors each one of the magnetic field is arranged, which mechanically connects these two coil cores. Axially between the coil cores of two adjacent magnetic field sensors is preferably arranged in each case exactly one of the magnetic field control elements.
  • the coil cores and the at least one magnetic field guide element are formed integrally in one piece, so that the coil cores and the at least one magnetic field guide element consist of a single workpiece and of the same material.
  • the magnetic field sensors comprising at least one coil are preferably fluxgate sensors or forster probes.
  • the magnetization regions preferably have a high magnetostriction. They are preferably magnetoelastic.
  • 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 has the shape of a straight circular cylinder, wherein the circular cylinder is arranged coaxially to the axis.
  • the prism or the cylinder is conical.
  • the prism or the cylinder can also be hollow.
  • the machine element is preferably formed by a shaft, by a hollow shaft, by a shift fork or by a flange. It may, for example, be a shaft in a bottom bracket or the flange of a roll stabilizer.
  • the shaft, the shift fork or the flange can be designed for loads due to different forces and torques.
  • the machine element can also be formed by completely different types of machine elements.
  • the at least two magnetic field sensors are preferably each formed by a semiconductor sensor, by a Hall sensor, by a SQUID, by a field plate, by a magnetostrictive sensor, by a coil, by a Förster probe or by a fluxgate magnetometer.
  • other types of sensors may also be used insofar as they are suitable for measuring at least one component of the magnetic field produced by the inverse-magnetostrictive effect.
  • the arrangement according to the invention is preferably designed for measuring a torque acting on the machine element, whose axis of rotation forms the axis of the machine element.
  • the arrangement according to the invention is preferably designed for measuring a transverse force acting on the machine element.
  • the force to be measured or the torque to be measured is determined by the arrangement of the magnetization regions and the magnetic field sensors, but also the different evaluation of the signals of the plurality of magnetic field sensors, for example by a sum or difference of the signals of the plurality of magnetic field sensors.
  • this comprises a plurality of groups of magnetic field sensors.
  • Each of the groups comprises at least two of the axially spaced-apart magnetic field sensors, between each of which one of the magnetic field guiding elements is arranged.
  • each of the groups has the same number of magnetic field sensors, which also equals the number of magnetization regions.
  • the groups are preferably at a same axial position and at a same radial position, but at different tangential positions, so that the groups are circumferentially distributed around the axis.
  • the arrangement according to the invention comprises two of the groups of magnetic field sensors which have an angle of 180 ° to one another with respect to the axis.
  • the magnetic field sensors are preferably arranged on a circuit board on which they are mechanically fastened and electrically connected.
  • the board carries preferably also the magnetic field guiding elements.
  • the board is preferred by
  • Said axial direction, said tangential direction and said radial direction basically relate to the axis of the machine element.
  • 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 the embodiment shown in Figure 3 in a side view.
  • Fig. 5 is a detail of the embodiment shown in Fig. 3;
  • Fig. 6 shows a fourth preferred embodiment of the invention
  • FIG. 7 shows a magnetic field guide element with a square sensor interface in a detail view
  • FIG. 8 shows a magnetic field guide element with a rectangular sensor interface in a detail view
  • FIG. 9 shows a magnetic field guide element with a circular sensor interface in a detail view
  • 10 shows a magnetic field guide element with two square sensor interfaces in a detail view
  • FIG. 11 shows a magnetic field guide element with two circular sensor interfaces in a detailed view.
  • FIG. 1 shows a first preferred embodiment of an inventive arrangement in a cross-sectional view passing through an axis 01 and in a section AA perpendicular to the axis 01.
  • the arrangement is used to measure a torque M t or a force, the torque M t or the force acts on a machine element in the form of a hollow cylindrical flange 02.
  • the flange 02 extends in the axis 01, so that the axis 01 also forms the axis of its hollow cylindrical shape.
  • the flange 02 is fixed to a base body 03.
  • the flange 02 has three circumferentially extending around the axis 01 around magnetization areas in the form of magnetization tracks 04, which are axially spaced from each other.
  • the three magnetization tracks 04 each have a permanent magnetization.
  • the three magnetization tracks 04 are identical and differ only in their magnetic polarity, d. H. in their sense of circulation.
  • magnetic field sensors 06 are arranged in the interior of the hollow cylindrical shape of the flange 02, which face the magnetization tracks 04.
  • the magnetic field sensors 06 are arranged in two groups 07, 08.
  • Each of the two groups 07, 08 comprises three of the magnetic field sensors 06, which are arranged axially spaced from one another on a straight line which runs parallel to the axis 01.
  • the two groups 07, 08 of the magnetic field sensors 06 are arranged symmetrically with respect to the axis 01.
  • Magnetic field guide elements 09 close magnetic circuits 11 between the magnetic fields.
  • the magnetic field elements 09 are attached to the flange 02 and magnetically coupled thereto. Between the magnetic field guide elements 09 and the magnetic field sensors 06, an air gap 12 is formed in each case.
  • the magnetic field sensors 06 are located in axial sections, in which the magnetization tracks 04 are arranged. Between the magnetization tracks 04, the flange 02 has non-magnetized regions which are located in axial sections in which the magnetic field guide elements 09 are also arranged.
  • the magnetic field guide elements 09 are shown in simplified form in FIG.
  • the magnetic field guide elements 09 preferably have a special shape, which is illustrated in FIGS. 2 to 11.
  • FIG. 2 shows a second preferred embodiment of the arrangement according to the invention in a cross-sectional view passing through the axis 01 and in a section A-A perpendicular to the axis 01. This embodiment initially resembles the embodiment shown in FIG.
  • the magnetic field 09 are formed ring-shaped, so that each of the magnetic field elements 09 magnetically connects the associated magnetic field sensors 06 both groups 07, 08 with the magnetizing tracks 04.
  • FIG. 3 shows a third preferred embodiment of the arrangement according to the invention in a cross-sectional view running through the axis 01 and in a partial plan view.
  • This embodiment is initially similar to the embodiment shown in FIG.
  • the magnetic field sensors 06 are formed in this embodiment by fluxgate sensors or by Förstersonden, each comprising a coil 13 on a spool core 14.
  • the magnetic field guide elements 09 and the coil cores 14 of the respective group 07 are formed within a single workpiece. As a result, a very low magnetic resistance between the magnetic field elements 09 and the magnetic field sensors 06 is effected.
  • Fig. 4 shows the embodiment shown in Fig. 3 in a side view. In this lateral view, a circuit board 16 is shown, which carries the magnetic field sensors 06 and the magnetic field guiding elements 09.
  • the magnetic field guide elements 09 each have a machine element boundary surface 17 with which they project beyond the flange 02. Between the machine element boundary surfaces 17 and the flange 02 one of the air gaps 12 is formed in each case.
  • the machine element boundary surfaces 17 are each formed in the shape of a cylinder jacket segment, so that they conform to the inner surface of the flange 02.
  • Fig. 5 shows a detail of the embodiment shown in Fig. 3.
  • one of the magnetic field guide elements 09 is shown, which adjoins one of those magnetic field sensors 06 which is axially adjacent only to one of the other magnetic field sensors 06.
  • 6 shows a fourth preferred embodiment of the arrangement according to the invention in a cross-sectional view. This embodiment is initially similar to the embodiment shown in FIG. In contrast to the embodiment shown in Fig.
  • the magnetic field control elements 09 are adapted to the spatially smaller magnetic field sensors 06 performed.
  • the magnetic field guiding elements 09 have one or two sensor boundary surfaces 19 with which they face the respective magnetic field sensor 06.
  • the sensor interfaces 19 are adapted to the size of the magnetic field sensors 06.
  • the magnetic field guide elements 09 are each fastened to the flange 02 via their machine element boundary surface 17.
  • the machine element boundary surfaces 17 are each larger than the sensor boundary surfaces 19.
  • the sensor boundary surfaces 19 have an axial offset relative to the machine element boundary surfaces 17, since the magnetic field sensors 06 are shorter axially than the sensor elements Magnetization tracks 04 are.
  • FIG. 7 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view.
  • This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6).
  • the sensor interface 19 is square and many times smaller than the machine element interface 17. The magnetic flux is strongly concentrated.
  • the sensor interface 19 is arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • FIG. 8 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view.
  • This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6).
  • the sensor interface 19 is rectangular and many times smaller than the machine element interface 17. This greatly concentrates the magnetic flux.
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • 9 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view. This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6).
  • the sensor interface 19 is circular and many times smaller than the machine element interface 17. This greatly concentrates the magnetic flux.
  • the sensor interface 19 is arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • Fig. 10 shows the magnetic field guiding element 09 of a further preferred embodiment in a detailed view.
  • This is one of the magnetic field guiding elements 09, which are each arranged axially between two adjacent ones of the magnetic field sensors 06 (shown in FIG. 6) and therefore have two of the sensor boundary surfaces 19.
  • the two sensor interfaces 19 are square and many times smaller than the machine element interface 17.
  • the sensor interfaces 19 are arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • FIG. 1 1 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view.
  • This is one of the magnetic field guide elements 09, which are each arranged axially between two adjacent magnetic field sensors 06 (shown in FIG. 6) and therefore have two of the sensor boundary surfaces 19.
  • the two sensor interfaces 19 are circular and many times smaller than the machine element interface 17.
  • the sensor interfaces 19 are arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.

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Abstract

La présente invention concerne un dispositif de mesure d'une force et/ou d'un couple sur un élément de machine (02) qui s'étend selon un axe (01). La mesure de la force et/ou du couple est effectuée à l'aide de l'effet magnétostrictif inverse. L'élément de machine (02) comporte au moins deux zones (04) qui s'étendent périphériquement autour de l'axe (01) pour une magnétisation. Le dispositif comprend en outre au moins deux capteurs de champ magnétique (06), placés axialement à distance l'un de l'autre, qui font chacun face à une des zones de magnétisation (04) et qui sont conçus chacun pour mesurer au moins une composante d'un champ magnétique généré par la magnétisation ainsi que par la force et/ou par le couple. Selon l'invention, un élément conducteur de champ magnétique (09) est formé entre les capteurs de champ magnétique (06).
PCT/DE2016/200003 2015-01-12 2016-01-11 Dispositif de mesure d'une force ou d'un couple pourvu d'un capteur de champ magnétique et d'un élément conducteur de champ magnétique WO2016112901A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015200268.3A DE102015200268B3 (de) 2015-01-12 2015-01-12 Anordnung zur Messung einer Kraft oder eines Momentes mit einem Magnetfeldsensor und mit einem Magnetfeldleitelement
DE102015200268.3 2015-01-12

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WO2016112901A1 true WO2016112901A1 (fr) 2016-07-21

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DE102017109535B4 (de) 2017-05-04 2019-12-12 Schaeffler Technologies AG & Co. KG Verfahren zum Messen eines Biegemomentes an einem Maschinenelement
DE102017114170B3 (de) 2017-06-27 2018-03-22 Schaeffler Technologies AG & Co. KG Anordnung und Verfahren zum Messen eines Biegemomentes an einem Maschinenelement
DE102017116508A1 (de) 2017-07-21 2019-01-24 Schaeffler Technologies AG & Co. KG Anordnung zur Messung einer Kraft oder eines Momentes sowie Magnetfeldsensor hierfür
DE102017121863A1 (de) 2017-09-21 2019-03-21 Schaeffler Technologies AG & Co. KG Anordnung zur Messung einer Kraft oder eines Momentes mit einem Magnetfeldsensor und einer Hülse
DE102018110553A1 (de) * 2018-05-03 2019-11-07 Schaeffler Technologies AG & Co. KG Drehmomentsensoranordnung und Wankstabilisator mit Drehmomentsensoranordnung
DE102018116798A1 (de) 2018-07-11 2020-01-16 Schaeffler Technologies AG & Co. KG Magnetfeldsensor und Anordnung mit diesem
DE102018218598A1 (de) * 2018-08-24 2020-02-27 Zf Friedrichshafen Ag Wankstabilisator und Sensoreinrichtung für einen Wankstabilisator
DE102020109606A1 (de) 2020-04-07 2021-10-07 Schaeffler Technologies AG & Co. KG Sensoranordnung zur Erfassung von Drehmoment und Drehzahl/Drehwinkel

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