WO2019185095A1 - Dispositif de mesure d'une force ou d'un couple sur un élément de machine et procédé de vérification du dispositif - Google Patents

Dispositif de mesure d'une force ou d'un couple sur un élément de machine et procédé de vérification du dispositif Download PDF

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Publication number
WO2019185095A1
WO2019185095A1 PCT/DE2019/100292 DE2019100292W WO2019185095A1 WO 2019185095 A1 WO2019185095 A1 WO 2019185095A1 DE 2019100292 W DE2019100292 W DE 2019100292W WO 2019185095 A1 WO2019185095 A1 WO 2019185095A1
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WO
WIPO (PCT)
Prior art keywords
magnetic field
field sensors
force
magnetization
axis
Prior art date
Application number
PCT/DE2019/100292
Other languages
German (de)
English (en)
Inventor
Stephan Neuschaefer-Rube
Thomas Lindenmayr
Jan Matysik
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.)
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Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2019185095A1 publication Critical patent/WO2019185095A1/fr

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Classifications

    • 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
    • G01L3/103—Details about the magnetic material used
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
    • G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque

Definitions

  • the present invention initially relates to a method for testing an arrangement for measuring a force and / or a moment on a machine element extending in an axis, wherein the measurement of the force or the moment takes place using the inverse magnetostrictive effect.
  • the machine element has at least two circumferentially extending around the axis
  • Magnetization areas which form a primary sensor for the measurement.
  • the arrangement comprises at least four magnetic field sensors as secondary sensors. The method allows the detection of a malfunction of the arrangement.
  • the invention relates to an arrangement for measuring a force and / or 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.
  • magnetoelastic transducer comprises.
  • the transducer sits as a cylindrical sleeve on a shaft.
  • Torque sensor includes a torque converter with opposite
  • US 8,578,794 B2 teaches a magnetoelastic torque sensor having a longitudinally extending member and a plurality of magnetoelastically active ones Regions as well as with primary and secondary magnetic field sensors, which are axially spaced.
  • a magnetoelastic torque sensor comprising a hollow longitudinally extending member having a plurality of magnetoelastically active regions.
  • the hollow element contains primary and secondary magnetic field sensors.
  • a magnetoelastic torque sensor which comprises a longitudinally extending element with a plurality of magnetoelastically active regions.
  • the torque sensor includes primary and secondary magnetic field sensors connected as a Wheatstone bridge.
  • the shaft has two magnetization regions, each of which is assigned two coils for measuring the magnetic fields.
  • US 2014/0360285 A1 teaches a magnetoelastic torque sensor with which a torque acting on a hollow shaft can be measured.
  • the hollow shaft has three circumferentially magnetized magnetization regions with alternating polarities. Opposite the magnetization regions four secondary magnetic field sensors are arranged.
  • the torque sensor comprises a hollow shaft having three circumferentially magnetized magnetization regions which have alternating polarities. Compared to the
  • Magnetization areas are arranged up to eight magnetic field sensors.
  • DE 10 2015 209 286 A1 shows an arrangement and a method for measuring a force and / or a moment on a machine element using the inverse-magnetostrictive effect.
  • the machine element has at least one Magnetization area for a magnetization on.
  • At least two spaced magnetic field sensors are used for measuring a magnetic field caused by the magnetization as well as by the force and / or by the moment.
  • the measurement signals of the magnetic field sensors are processed individually.
  • the object of the present invention is to be able to better recognize malfunctions in a measurement of forces and / or moments based on the inverse-magnetostrictive effect
  • the method according to the invention is used to test an arrangement which is used to measure a force and / or moment at an axis
  • the force or the moment acts on the machine element of the arrangement, 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 following directions, namely the axial direction, the radial direction and the tangential direction are related to the said axis.
  • the arrangement is preferably designed to measure a moment which lies in the axis, so that it is a
  • Torsionsmoment act by which the machine element is loaded.
  • the vector of the moment is in the axis.
  • the machine element has at least two magnetization areas extending circumferentially around the axis for each magnetization formed in the machine element. It is thus at least two magnetization areas revolving around the axis, ie circular
  • Magnetization regions wherein the axis itself preferably does not form part of the magnetization regions.
  • the magnetization regions preferably have only a tangential orientation with respect to a surface of the machine element extending around the axis.
  • Magnetization regions preferably each extend along one
  • the magnetization areas may have short gaps.
  • the magnetization regions preferably have a same spatial extent and are axially spaced apart. Particularly preferably, the magnetization regions are designed in the form of magnetization tracks.
  • the magnetization regions each form a primary sensor for determining the force or the moment.
  • the machine element preferably also has magnetically neutral regions, which are each arranged axially between the magnetization regions and / or axially next to the magnetization regions of the machine element.
  • Machine element preferably has at least one of the magnetically neutral regions.
  • the magnetically neutral regions have neither one
  • the magnetically neutral regions are preferably not magnetized.
  • the magnetically neutral regions are preferably each formed in an axial section of the machine element.
  • the arrangement furthermore comprises at least four magnetic field sensors which each form a secondary sensor for determining the force or the moment.
  • the primary sensors, d. H. the magnetization areas are used to convert the force to be measured or the moment to be measured into a corresponding one
  • Magnetic field while the secondary sensors allow the conversion of this magnetic field into electrical signals.
  • the magnetic field sensors are each for individual measurement of an axially oriented direction component of a through Magnetization as well as caused by the force and / or by the moment
  • Magnetic field formed.
  • the said magnetic field occurs due to
  • At least two different combinations of at least two of the magnetic field sensors there are at least two different combinations of at least two of the magnetic field sensors, each of these combinations being sufficient to measure the force or torque.
  • the at least two combinations are redundant with regard to their suitability for measuring the measurement of the same force or moment.
  • the combinations are to be understood in the sense of combinatorics and each provide a selection of at least two of
  • Magnetic field sensors may include and one of the combinations may be formed by all of the magnetic field sensors. At least two different combinations of the at least four magnetic field sensors can be selected, each of which is suitable for measuring the force or the moment. Particularly preferably, there are at least three of the combinations of at least two of the magnetic field sensors, each of these combinations being sufficient for measuring the force or the moment.
  • the magnetic field sensors are arranged opposite the machine element, with preferably only a small radial distance between the magnetic field sensors and an inner or outer surface of the machine element being present.
  • the magnetic field sensors preferably have an equal distance from the axis.
  • a determination of a first measured value of the force or of the moment takes place with a first of the combinations of the magnetic field sensors while the force or the moment is acting.
  • Measured value is taken from measurement signals of the individual to the first combination
  • a determination of a second measured value of the force or of the moment with a second of the Combinations of magnetic field sensors while the force or moment is working is taken from measurement signals of the individual to the second
  • the determination of the first measured value and the determination of the second measured value are preferably carried out simultaneously or at least within a time span in which the force or the moment does not change.
  • the measured values qualitatively and quantitatively represent the same force or moment.
  • the first measured value and the second measured value are the same if the arrangement operates without errors.
  • the first measured value is compared with the second measured value, so that the result of this comparison is based on an error-free function or on a faulty function of the arrangement
  • a particular advantage of the method according to the invention is that, as a result of the comparison of the measured values, a largely reliable statement as to whether the arrangement operates faultlessly or incorrectly.
  • the at least two magnetization regions can be permanently or temporarily magnetized.
  • the magnetization regions are preferably permanent
  • the arrangement further comprises at least one magnet for magnetizing the magnetization regions, so that the
  • Magnetization of the magnetization regions is basically temporary.
  • the at least one magnet can be formed by a permanent magnet or preferably by an electromagnet.
  • the permanently or temporarily magnetized magnetization regions are in a state of the load unloaded by a force or by a moment
  • Machine element to the outside of the magnetization preferably magnetically neutral, so that no technically relevant magnetic field outside the magnetization ranges can be measured.
  • the magnetization areas each represent a part of the volume of the
  • the magnetization regions are preferably each annular, wherein the axis of the machine element also forms a central axis of the respective ring shape. Particularly preferred are the
  • Magnetizing regions each have the shape of a coaxial with the axis of the machine element hollow cylinder.
  • the magnetization regions preferably each have a high magnetostriction.
  • the magnetization regions are preferably axially spaced from one another
  • each one of the magnetically neutral regions may be arranged, between each of two adjacent magnetization regions each one of the magnetically neutral regions may be arranged. Insofar as more than two of the magnetization regions are present, they preferably each have an equal distance from one another.
  • Magnetization regions preferably have opposite polarities, i. H. they have an opposite sense of circulation.
  • the machine element consists of a magnetostrictive or magnetoelastic material. This preferably exists
  • Machine element made entirely of magnetostrictive or magnetoelastic material.
  • the machine element consists of a steel.
  • 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. This preferably has
  • Machine element in the form of a right 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. This is especially preferred
  • Machine element in the form of a straight hollow circular cylinder, wherein the hollow circular cylinder is arranged coaxially with the axis.
  • the machine element is preferably formed by a shaft, by a Flohlwelle, by a shift fork, by a flange or by a Flohlflansch.
  • the shaft, the shift fork or the flange can be used for loads
  • the machine element can also be formed by completely different types of machine elements.
  • the magnetic field sensors are preferably each formed by a Flalbleitersensor.
  • the at least two magnetic field sensors are preferably each formed by an MR sensor, by a flat sensor, by a field plate, by a SQUID, by a coil element, by a Förster probe or by a fluxgate magnetometer.
  • other sensor types can be used insofar as they are suitable for measuring the axial directional component of the magnetic field produced by the inverse-magnetostrictive effect.
  • the magnetic field sensors preferably have an equal distance from the axis of the machine element.
  • the magnetic field sensors can be arranged outside the machine element or, preferably, also within a flea space of the machine element; For example, when the machine element is formed by a Flohlwelle or by a Flohlflansch.
  • the magnetic field sensors preferably each have an axial position such as one of the magnetization regions.
  • the magnetic field sensors preferably each have one axial position, which is a middle axial position of the
  • Magnetization ranges are equal.
  • These at least two magnetic field sensors preferably lie together on a straight line parallel to the axis.
  • These magnetic field sensors having at least two identical tangential or identical circumferential position are axially adjacent and preferably each have an identical axial position as axially adjacent magnetization regions. It is also possible for two magnetic field sensors having the same tangential or identical circumferential position to have the same axial position as only one of the magnetization regions.
  • At least one of the magnetization regions preferably has the same axial position as at least two of the magnetic field sensors, so that this
  • Magnetization region are assigned to two of the magnetic field sensors. These two magnetic field sensors having the same axial position are preferably arranged opposite one another with respect to the axis, so that they have a midpoint angle of 180 ° to one another and a straight line intersecting the two magnetic field sensors intersects the axis perpendicularly. More preferably, each of the
  • Magnetization regions on the same axial position as two of the magnetic field sensors so that each of the magnetization regions at least two of the
  • the arrangement preferably furthermore comprises a measurement signal processing unit, which is designed to determine and compare the measured values.
  • Magnetic field sensors are preferably electrically connected individually to the measurement signal processing unit, so that in each case a single measurement signal from each of the
  • Magnetic field sensors is passed to the measurement signal processing unit.
  • Preferred embodiments of the method according to the invention comprise a step in which the magnetic field sensors are calibrated individually. This compensates for an offset and the sensitivity of the magnetic field sensors to one another be matched, so that the reliability of error detection is increased again.
  • At least three of the measured values are determined and compared with one another. Accordingly, there are preferably at least three of
  • Combinations of at least two of the magnetic field sensors each of these combinations being sufficient to measure the force or the moment.
  • the first measured value, the second measured value and the third measured value are compared with one another. More preferably, at least four of the measured values are determined and compared with each other.
  • Those embodiments in which three or more of the measured values are determined and compared preferably comprise a further step, in which, in the event of deviations between the measured values, the one or more of the magnetic field sensors which do not work correctly are determined.
  • Magnetization areas has a faulty function.
  • Measured values or squares of the differences between the measured values are formed. It is preferably a sum of the absolute amounts of the differences between the measured values or a sum of the squares of the differences between the measured values
  • the corresponding sum is preferably used as a test signal.
  • an error signal is output if the sum of the absolute amounts of the differences between the measured values or the sum of the squares of the differences of the differences between the measured values is a pre-defined one
  • Exceeds maximum size The maximum dimension defines in advance the difference between the measured values that the arrangement is considered to be free from defects.
  • the error signal is preferably reported to a higher-level controller or to an operator of the arrangement, so that the parent Control or the operator is aware that the arrangement no longer measures error-free.
  • the arrangement is for measuring a moment acting on the machine element and lying in the axis, that is, in the direction of the axis. H. formed a torsional moment.
  • the machine element has two of the magnetization regions of opposite polarities. Each of the magnetization regions has the same axial position as two of the magnetic field sensors, wherein these two are arranged opposite to each other, a magnetic position sensors having the same axial position with respect to the axis.
  • Each two of the four magnetic field sensors have an identical tangential position and are axially adjacent. A first of the four magnetic field sensors outputs a measurement signal ai.
  • the magnetic field sensor having the first magnetic field sensor opposite the axis and having the same axial position as the first magnetic field sensor forms a second magnetic field sensor which outputs a measurement signal a2.
  • the measurement signals ai and a2 represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with opposite
  • the measurement signals ai and a2 represent the axial
  • Magnetic field sensor axially adjacent and a same circumferential position as the first magnetic field sensor having magnetic field sensor forms a third of the magnetic field sensors, which outputs a measurement signal bi.
  • the measurement signals ai and bi represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with the same sense of direction; d. H. the measurement signals ai and bi represent the axial direction components with the same sign.
  • the magnetic field sensor having the third magnetic field sensor opposite to the axis and having the same axial position as the third magnetic field sensor constitutes a fourth of the magnetic field sensors which outputs a measurement signal b2.
  • the measurement signals bi and b2 represent the axial direction components of the due to the inverse magnetostrictive effect
  • Measurement signals bi and b2 represent the axial direction components with different signs. At least two of the measured values of the moment are each determined according to one of the following mathematical rules:
  • the first combination includes the first, second, third and fourth magnetic field sensors.
  • the second combination includes the first and fourth magnetic field sensors.
  • the third combination includes the second and third magnetic field sensors.
  • test signal T is determined according to one of the following instructions:
  • the test signal T becomes one of the following
  • the arrangement is likewise designed to measure a moment acting on the machine element and lying in the axis, ie a torsional moment.
  • the machine element has three of the magnetization regions of alternating polarities.
  • the axially middle of the magnetization regions has the same axial position as two of the magnetic field sensors, wherein these two are arranged opposite one another with the same axial position magnetic field sensors with respect to the axis.
  • Each two of the four magnetic field sensors have an identical tangential position and are axially adjacent.
  • the axially outer magnetization regions each have the same axial position as one of the four magnetic field sensors.
  • Magnetic field sensors have the same axial position as one of the axially outer magnetization regions.
  • the first magnetic field sensor outputs a measurement signal ai.
  • Magnetic field sensor forms a second of the magnetic field sensors, which a
  • the measurement signals ai and bi represent the axial
  • the measurement signals ai and bi represent the axial direction components with the same sign.
  • Magnetic field sensor forms a third of the magnetic field sensors, which a
  • the measuring signals bi and b2 represent the axial
  • Measurement signals bi and b2 represent the axial direction components with different signs.
  • the third magnetic field sensor axially adjacent and a same circumferential position as the third magnetic field sensor having magnetic field sensor forms a fourth of the magnetic field sensors, which
  • Measuring signal 02 outputs.
  • the measuring signals b2 and 02 represent the axial
  • the measuring signals b2 and C2 represent the axial direction components with the same sign.
  • At least two of the measured values of the moment are determined according to one of the following regulations:
  • the first combination includes the first, second, third and fourth magnetic field sensors.
  • the second combination includes the first and fourth magnetic field sensors.
  • the third combination includes the second and third magnetic field sensors.
  • test signal T is determined according to one of the following instructions:
  • the test signal T becomes one of the following
  • Machine element acting and in-axis torque, d. H. formed a torsional moment.
  • the machine element has three of
  • Magnetization regions has the same axial position as two of the
  • magnetic field sensors are arranged with respect to the axis opposite. Each three of the six magnetic field sensors have an identical tangential position and are axially adjacent. A first of the six
  • Magnetic field sensors have the same axial position as one of the axially outer magnetization regions.
  • the first magnetic field sensor outputs a measurement signal ai.
  • the magnetic field sensor having the first magnetic field sensor opposite the axis and having the same axial position as the first magnetic field sensor forms a second magnetic field sensor which outputs a measurement signal a2.
  • the measurement signals ai and a2 represent the axial direction components of the inverse magnetostrictive effect
  • Measurement signals ai and a2 represent the axial direction components with different signs.
  • the magnetic field sensor axially adjacent to the first magnetic field sensor and having the same circumferential position as the first magnetic field sensor forms a third magnetic field sensor
  • the third magnetic field sensor has the same axial position as the middle magnetization region.
  • the measurement signals ai and bi represent the axial direction components with the same sign.
  • the magnetic field sensor having the third magnetic field sensor opposite to the axis and having the same axial position as the third magnetic field sensor constitutes a fourth of the magnetic field sensors which outputs a measurement signal b2.
  • the measurement signals bi and b2 represent the axial direction components of the due to the inverse magnetostrictive effect
  • the third magnetic field sensor axially adjacent and a same circumferential position as the first magnetic field sensor and the third magnetic field sensor having magnetic field sensor forms a fifth of
  • Magnetic field sensors which outputs a measurement signal ci.
  • the measurement signals bi and ci represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with the same sense of direction; d. H. the measurement signals bi and ci represent the axial direction components with the same sign.
  • the magnetic field sensor having the fifth magnetic field sensor opposite to the axis and having the same axial position as the fifth magnetic field sensor constitutes a sixth of the magnetic field sensors which outputs a measurement signal C2.
  • the measurement signals ci and C2 represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with opposite sense of direction; d. H. the
  • Measurement signals ci and C2 represent the axial direction components with different signs. At least two of the measured values of the moment are determined according to one of the following regulations:
  • the first combination comprises the first, the second, the third, the fourth, the fifth and the sixth magnetic field sensor.
  • the second combination includes the first, third, fourth and sixth magnetic field sensors.
  • the third combination includes the second, third, fourth and fifth magnetic field sensors.
  • the fourth combination includes the first, second, third and fourth magnetic field sensors.
  • the fifth combination includes the third, fourth, fifth and sixth magnetic field sensors.
  • Combination includes the first and the fourth magnetic field sensor.
  • the seventh combination includes the third and second magnetic field sensors.
  • the eighth combination includes the third and sixth magnetic field sensors.
  • the ninth combination includes the fourth and fifth magnetic field sensors.
  • test signal T is correspondingly as in the first and second preferred
  • the arrangement is again for measuring one on the
  • Machine element acting and in-axis torque, d. H. formed a torsional moment.
  • the machine element has three of
  • the two axially outwardly arranged magnetization regions each have the same axial position as two of the magnetic field sensors, wherein these two magnetic field sensors having an identical axial position are arranged opposite one another with respect to the axis.
  • the axially middle magnetization region has the same axial position as four of the magnetic field sensors, two of these each Magnetic sensors are arranged directly next to each other and form a pair. Because of this immediately adjacent arrangement, the magnetic field sensors of each of the two pairs have substantially the same position.
  • the two pairs of identical axial positions are arranged opposite each other with respect to the axis.
  • Four of the eight magnetic field sensors each have an identical tangential position and are axially adjacent. A first of the eight
  • Magnetic field sensors have the same axial position as one of the axially outer magnetization regions.
  • the first magnetic field sensor outputs a measurement signal ai.
  • the magnetic field sensor having the first magnetic field sensor opposite the axis and having the same axial position as the first magnetic field sensor forms a second magnetic field sensor which outputs a measurement signal a2.
  • the measurement signals ai and a2 represent the axial direction components of the inverse magnetostrictive effect
  • Measurement signals ai and a2 represent the axial direction components with different signs.
  • the pair of magnetic field sensors which is axially adjacent to the first magnetic field sensor and has the same circumferential position as the first magnetic field sensor comprises a third of the first magnetic field sensor
  • Magnetic field sensors which outputs a measurement signal bn, and a fourth of the magnetic field sensors, which outputs a measurement signal bi2.
  • the third magnetic field sensor and the fourth magnetic field sensor have the same axial position as the axially middle magnetization region.
  • the measurement signals ai, bn, and bi2 represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with the same sense of direction; d. H. the measurement signals ai, bn and bi2 represent the axial direction components with the same sign.
  • the third and fourth magnetic field sensor with respect to the axis
  • Magnetic field sensor comprising a fifth of the magnetic field sensors, which outputs a measurement signal b2i, and a sixth of the magnetic field sensors, which outputs a measurement signal b22.
  • the measurement signals bn and b2i represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with opposite sense of direction; d. H. the
  • Measurement signals bn and b2i represent the axial direction components with different signs.
  • the measurement signals b2i and b22 represent the axial direction components of the inverse magnetostrictive effect
  • the measurement signals b2i and b22 represent the axial direction components with the same sign.
  • the third magnetic field sensor and the fourth magnetic field sensor having magnetic field sensor forms a seventh of
  • Magnetic field sensors which outputs a measurement signal ci.
  • the measurement signals bn and ci represent the axial direction components of the magnetic field occurring due to the inverse magnetostrictive effect with the same sense of direction; d. H. the measurement signals bn and ci represent the axial direction components with the same sign.
  • Magnetic field sensors which outputs a measurement signal C2.
  • the measurement signals ci and C2 represent the axial direction components due to the magnetic field occurring inverse magnetostrictive effect with opposite
  • the first combination comprises the first, the second, the third, the fourth, the fifth, the sixth, the seventh and the eighth
  • the second combination includes the first, second, third, fifth, seventh and eighth magnetic field sensors.
  • the third combination includes the first, the third, the fifth and the eighth
  • the fourth combination includes the third, fifth, seventh and eighth magnetic field sensors.
  • the fifth combination includes the first and fifth magnetic field sensors.
  • the sixth combination includes the third and second magnetic field sensors.
  • the seventh combination includes the third and eighth magnetic field sensors.
  • the eighth combination comprises the fifth and seventh magnetic field sensors.
  • test signal T is correspondingly as in the first and second preferred
  • the arrangement according to the invention serves to measure a force and / or a moment on a machine element extending in an axis.
  • the machine element has at least two magnetization areas extending in each case around the axis for one magnetization in each case.
  • the arrangement comprises at least four magnetic field sensors each for measuring a axial direction component of a magnetic field caused by the magnetization and by the force and / or by the moment. There are at least two combinations of at least two of the magnetic field sensors each. Each of these combinations is sufficient for measuring the force or the moment.
  • Arrangement further comprises a measurement signal processing unit, which is designed for carrying out the method according to the invention.
  • Measurement signal processing unit is preferably designed for carrying out one of the described preferred embodiments of the method according to the invention. Moreover, the arrangement preferably also has features which are specified in connection with the method according to the invention.
  • the measurement signal processing unit is preferably formed by a microcontroller. In a broader sense, the measurement signal processing unit is preferably a
  • 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
  • Arrangement comprises a machine element made of a steel in the form of a Hollow flange 01, which extends in an axis 03. On the hollow flange 01 acts a torsional moment Mt, which can be measured with the inventive arrangement.
  • the hollow flange 01 has two magnetization regions 04 in the form of circumferential tracks.
  • the two magnetization regions 04 are permanently magnetized and oppositely poled, which in each case by a circulating sense
  • the two magnetization regions 04 form a primary sensor for the measurement of the torsional moment Mt using the inverse-magnetostrictive effect.
  • the arrangement further comprises four magnetic field sensors 06, which are located in the interior of the hollow flange 01.
  • the four magnetic field sensors 06 are at the same distance from the axis 03.
  • the four magnetic field sensors 06 each serve to measure an axial
  • a magnetic field direction of this magnetic field is at each of the positions of the magnetic field sensors 06 through one of the respective
  • Measuring direction of the magnetic field sensors 06 is illustrated by the symbol used for the magnetic field sensors 06 with an arrow.
  • Two of the four magnetic field sensors 06 have the same axial position as a first one of the magnetization regions 04. Two more of the four magnetic field sensors 06 have the same axial position as a second one of the magnetization regions 06.
  • a first magnetic field sensor 11 of the four magnetic field sensors 06 outputs a signal ai.
  • the first magnetic field sensor 11 with respect to the axis 03 opposite magnetic field sensor 06 forms a second magnetic field sensor 12 which outputs a signal a2.
  • the magnetic field sensor axially adjacent to the first magnetic field sensor 11 06 forms a third magnetic field sensor 13, which outputs a signal bi.
  • Magnetic field sensor 06 forms a fourth magnetic field sensor 14, which outputs a signal b2.
  • the arrangement further comprises a microcontroller (not shown), which is used for measuring signal processing and for carrying out an inventive
  • a method for checking the arrangement is configured.
  • Fig. 2 shows a second preferred embodiment of the invention
  • the hollow flange 01 has three of the magnetization regions 04, which are alternately poled.
  • the first magnetic field sensor 11 of the four magnetic field sensors 06 in turn outputs the signal ai.
  • the second magnetic field sensor 12 is axially adjacent to the first magnetic field sensor 11 and outputs the signal bi.
  • the third magnetic field sensor 13 is disposed opposite to the first magnetic field sensor 11 with respect to the axis 03 and outputs the signal b2.
  • the fourth magnetic field sensor 14 is the third
  • Magnetic field sensor 13 axially adjacent and outputs the signal 02 from.
  • Fig. 3 shows a third preferred embodiment of the invention
  • FIG. 2 In contrast to the second embodiment shown in FIG. 2, FIG. 2
  • the first magnetic field sensor 11 of the six magnetic field sensors 06 in turn outputs the signal ai.
  • the second magnetic field sensor 11 of the six magnetic field sensors 06 in turn outputs the signal ai.
  • Magnetic field sensor 12 is disposed opposite to first magnetic field sensor 11 with respect to axis 03 and outputs signal a2.
  • the third magnetic field sensor 13 is axially adjacent to the first magnetic field sensor 11 and outputs the signal bi.
  • the fourth magnetic field sensor 14 is the third with respect to the axis 03
  • a fifth magnetic field sensor 15 of the six magnetic field sensors 06 is the third Magnetic field sensor 13 axially adjacent and outputs the signal ci.
  • a sixth magnetic field sensor 16 of the six magnetic field sensors 06 is arranged opposite to the fifth magnetic field sensor 15 with respect to the axis 03 and outputs the signal C2.
  • Fig. 4 shows a fourth preferred embodiment of the invention
  • FIG. 3 In contrast to the third embodiment shown in FIG. 3, FIG. 3
  • the first magnetic field sensor 11 of the six magnetic field sensors 06 in turn outputs the signal ai.
  • the second magnetic field sensor 11 of the six magnetic field sensors 06 in turn outputs the signal ai.
  • Magnetic field sensor 12 is disposed opposite to first magnetic field sensor 11 with respect to axis 03 and outputs signal a2.
  • the third magnetic field sensor 13 is axially adjacent to the first magnetic field sensor 11 and outputs the signal bn.
  • the fourth magnetic field sensor 14 is located immediately next to the third magnetic field sensor 13 outputs the signal bi2.
  • the fifth magnetic field sensor 15 is disposed opposite to the third magnetic field sensor 13 with respect to the axis 03 and outputs the signal b2i.
  • the sixth magnetic field sensor 16 is located immediately next to the fifth magnetic field sensor 13 outputs the signal b22.
  • a seventh magnetic field sensor 17 of the eight magnetic field sensors 06 is axially adjacent to the third magnetic field sensor 13 and outputs the signal ci.
  • Magnetic field sensor 18 of the six magnetic field sensors 06 is arranged opposite to the seventh magnetic field sensor 17 with respect to the axis 03 and outputs the signal C2.
  • Machine element in the form of a hollow flange

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

Abstract

L'invention concerne un procédé de vérification d'un dispositif de mesure d'une force et/ou d'un couple (Mt) sur un élément de machine (01) s'étendant dans un axe (03), la mesure étant réalisée en utilisant l'effet magnétostrictif inverse. L'élément de machine (01) comporte au moins deux zones d'aimantation (04) s'étendant de manière circonférentielle autour de l'axe (03). Le dispositif comprend au moins quatre capteurs de champ magnétique (06) pour mesurer une composante axiale d'un champ magnétique provoquée par l'aimantation ainsi que par la force et/ou par le couple (Mt). Il existe au moins deux combinaisons d'au moins deux des capteurs de champ magnétique (06), qui sont respectivement suffisantes pour mesurer la force ou le couple (Mt). Dans une étape du procédé, une première valeur mesurée de la force ou du couple (Mt) est déterminée au moyen d'une première des combinaisons des capteurs de champ magnétique (06). En outre, une deuxième valeur mesurée de la force ou du couple (Mt) est déterminée au moyen d'une deuxième des combinaisons des capteurs de champ magnétique (06). Selon l'invention, la première valeur mesurée et la deuxième valeur mesurée sont comparées, ce qui permet de détecter un dysfonctionnement du dispositif. En outre, l'invention concerne un dispositif de mesure d'une force et/ou d'un couple (Mt) sur un élément de machine (01).
PCT/DE2019/100292 2018-03-29 2019-03-28 Dispositif de mesure d'une force ou d'un couple sur un élément de machine et procédé de vérification du dispositif WO2019185095A1 (fr)

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DE102018107570.7A DE102018107570B4 (de) 2018-03-29 2018-03-29 Anordnung zum Messen einer Kraft oder eines Momentes an einem Maschinenelement und Verfahren zum Prüfen der Anordnung
DE102018107570.7 2018-03-29

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DE102019109863B4 (de) 2019-03-21 2024-01-25 Schaeffler Technologies AG & Co. KG Hybridmodul für einen Hybrid-Antriebsstrang sowie Anlassverfahren für eine Verbrennungskraftmaschine mit einem Hybridmodul
DE102019112155A1 (de) * 2019-05-09 2020-11-12 Schaeffler Technologies AG & Co. KG Anordnung zum Messen eines auf eine Lenkwelle eines Kraftfahrzeuges wirkenden Momentes und Verfahren zum Prüfen der Anordnung
DE102019120468A1 (de) * 2019-07-30 2021-02-04 Schaeffler Technologies AG & Co. KG Anordnung zum Messen einer Kraft oder eines Momentes und Verfahren zum Prüfen der Anordnung
DE102019125954A1 (de) 2019-08-15 2021-02-18 Schaeffler Technologies AG & Co. KG Beschleunigungsverfahren für einen Hybrid-Antriebsstrang

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