WO2014090343A1 - Vorrichtung und verfahren zum erfassen einer winkelposition - Google Patents
Vorrichtung und verfahren zum erfassen einer winkelposition Download PDFInfo
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- WO2014090343A1 WO2014090343A1 PCT/EP2012/075646 EP2012075646W WO2014090343A1 WO 2014090343 A1 WO2014090343 A1 WO 2014090343A1 EP 2012075646 W EP2012075646 W EP 2012075646W WO 2014090343 A1 WO2014090343 A1 WO 2014090343A1
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- WO
- WIPO (PCT)
- Prior art keywords
- magnetic field
- movable element
- field strength
- rotatably movable
- angular position
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
Definitions
- the present invention relates to a device for inspecting a measurement object, with at least one rotatable about at least one axis of rotation in a plurality of angular positions movable element.
- the present invention relates to a method for determining an angular position of at least one rotational axis in a plurality of angular positions rotatably movable element in a device for inspecting a measurement object.
- Such devices and methods are known in principle.
- devices for inspecting measuring objects for example in a coordinate measuring machine or in a microscope, such as, for example, a laser scanning microscope or a confocal laser scanning microscope
- the use of optical measuring methods frequently results in the use of optical measuring methods.
- the mirror elements can be used, for example, for deflecting a laser beam and thus for moving a measuring point over a measuring object.
- optical trilateration methods are used for determining the position of measuring objects, the position of a moving measuring object being followed by a so-called tracking mirror.
- DMD digital mirror devices
- MEMS microelectromechanical systems
- Such mirror elements can be tilted about one or else about two axes of rotation and electronically controlled.
- MEMS micromirrors enable a continuous adjustment of an angular position of the micromirror about each rotation axis by driving with a certain voltage.
- the angular position is only approximately proportional to an applied voltage.
- precise applications which basically include metrological optical applications, it is therefore necessary not only to precisely set the voltage to be applied, but also to detect or check the actual angular position of the mirror element.
- auxiliary light beams e.g. emitted by light emitting diodes, used whose deflection is detected by a detector.
- auxiliary light beams e.g. emitted by light emitting diodes, used whose deflection is detected by a detector.
- the auxiliary light beam is irradiated on a rear side of the mirror element, since an angular position of the rear side is identical to the angular position of the actual mirror surface or is in a fixed relationship with it. In this way, the otherwise unused space behind the mirror element is then used to determine the angular position of the mirror element.
- the document DE 199 37 021 A1 proposes in the field of automotive technology to detect a mirror position in an exterior mirror of a motor vehicle by means of a Hall sensor or magnetoresistive sensor. It is proposed there to provide a linearly magnetized region whose linear arrangement of the north and south poles is detected by the sensor array.
- the document WO 2012/019958 A2 shows a sensor arrangement with a first and a second magnetic field sensor and a magnet arranged between them for generating a defined magnetic field and a method for determining a spatial position of a probe element relative to a probe base in a tactile measuring coordinate measuring machine ,
- the document DE 10 2010 031 976 A1 shows a method and an arrangement for determining a coupled and / or decoupled state of a couplable part of a coordinate measuring machine, which is a magnetoresistive sensor used to generate an output signal representing the state.
- the rotatably movable element is an optical element, wherein the rotatably movable element has at least one magnetic encoder, and that the device further comprises at least one magneto-sensitive sensor to detect the angular position of the rotatable element.
- rotatably movable is meant any change in a tilt or tilt of an element. It thus includes both rotational movements about a center of gravity of the element as well as pivotal movements about an axis of rotation, which lies outside of the center of gravity.
- optical element any type of optically active element, for example, an optical element may be a light emitting element, such as any type of lamp, LED, laser or other light source
- an optical element can also be a refractive and / or diffractive and / or holographic element, which can be used in particular for beam guidance, in particular the optical element is a mirror element or at least partially reflective element .
- axis of rotation is not necessarily to be understood in the sense of an ideal axis for describing a rotational movement, but can - as the present invention in particular also solid joints and thus torsions of solids treated - as a dependent of a deflection effective rotation axis be understood.
- a “magnetic field transmitter” is understood to be an element which permanently or switchably has or generates a magnetic field.
- a magnetic field transmitter may be a permanent magnet or any type of magnetized element that has a permanent, static magnetic field.
- it may also be an element which has or generates a dynamic switchable magnetic field, for example a coil arrangement or the like.
- the magneto-sensitive sensor is a sensor which is capable of determining a direction and / or strength of a magnetic field, ie, a magnetic field strength or a magnetic flux density.
- the magneto-sensitive sensor can be a magnetoresistive sensor, a magnetoinductive sensor or a Hall sensor. These sensor types are generally familiar to the average person skilled in the art. It can also be several sensors of the same kind, for example, several magnetoresistive Sensors, be provided. In the case of multiple magnetoresistive sensors, at least one magnetoresistive sensor may be operated in saturation and at least one magnetoresistive sensor may not be operated in saturation. However, it is also possible to combine different types of magneto-sensitive sensors with one another, for example at least one magnetoresistive sensor and at least one Hall sensor.
- magnetoresistive sensors a possibility can be provided to detect an angular position of a rotatably movable element very precisely without additional optical apparatus construction, without influencing a dynamics of the rotatably movable element.
- Application areas for such a compact sensor structure are reflection elements for optical light beams or images, for example in a laser scan microscope or a confocal laser scan microscope, trilateral position measuring systems, laser sensors with pointwise or linear object scanning, for example optical triangulation sensors, or the determination of an angular position of other, in particular microelectromechanical, components or assemblies which need not necessarily be mirror elements.
- Measuring arrangement the number of mechanically moving and to be adjusted parts are reduced. In this way, very light and robust systems for detecting the angular position can be provided.
- a position of the element, in particular of a mirror element can be determined exactly for each individual measuring point during the inspection of the test object. In this way, the problem of nonlinearity in the dependence of the angular position of the mirror element on the applied control voltage can be compensated.
- a magnetoresistive sensor is often magnetically operated in saturation, since it preferably serves to measure the direction or orientation of the magnetic field. Thus, a single saturated magnetoresistive sensor can not measure field strength. Only the measurement of the field direction or
- the arrangement is preferably carried out by means of an arrangement of a plurality of individual sensors in a known angular position relative to one another, wherein the individual sensors for a two-dimensional measuring cell are usually combined during production in a most compact possible structure.
- the term "at least one magneto-sensitive sensor” is therefore both to understand an individual sensor as well as in each case an arrangement of a plurality of individual sensors in a known position relative to each other.
- the individual sensors may be a plurality of sensors of the same type, for example a plurality of magnetoresistive sensors.
- the magnetoresistive sensors may be arranged at different distances to the magnetic field transmitter.
- a first saturable magnetoresistive sensor can measure the direction of the magnetic field.
- a second in a different, in particular larger, distance than the first arranged magnetoresistive sensor, which is not operated in saturation, can then measure the magnetic field strength or the magnetic flux.
- different types of individual sensors can also be combined with one another, for example at least one magnetoresistive sensor and at least one Hall sensor. In this way, one is able to determine both a direction and a strength of a magnetic field, ie, a magnetic field strength or a magnetic flux density.
- a position of the axis of rotation is dependent on the deflection angle. It is often sufficient for mirror elements to determine their angle of inclination. Whether in addition a lateral displacement of the axis of rotation occurs is often negligible in the case of a mirror element in a first approximation.
- both inclination and displacement of the axis of rotation can be detected, so that movement corrections for the second order of errors can also be detected.
- the rotatably movable element is an optical element, wherein the at least one rotational axis in a plurality of angular positions rotatably movable element has at least one magnetic encoder, and that the angular position of the rotatably movable element is detected by means of at least one magneto-sensitive sensor.
- the proposed method thus has the same advantages as the proposed device.
- the at least one magnetic encoder has an inhomogeneous magnetic field, at least in a region of the magneto-sensitive sensor based on the magnetic field strength or the magnetic flux density.
- the magnetic field is therefore inhomogeneous in the region of the magneto-sensitive sensor relative to the magnetic field strength or to the magnetic flux density.
- the magnetic field strength decreases with increasing distance from the magnetic field transmitter.
- the magnetic field sensor is designed such that the magnetic field in a region of the magneto-sensitive sensor has the largest possible gradient in an amount of magnetic field strength, so that changes in position of the magnetic encoder can be detected as sensitive as possible via the associated change in the amount of magnetic field strength , The greater the inhomogeneity of the magnetic field, the better.
- the magnetic field strength is linked to the magnetic flux density. Equivalent, therefore, the magnetic field can be described as inhomogeneous with respect to the magnetic flux density.
- the at least one magneto-sensitive sensor is designed such that it includes both a change in the direction of the magnetic field strength or the magnetic flux density and a change in the amount of magnetic field strength or magnetic flux density detected.
- such a magneto-sensitive sensor may be a magnetoresistive sensor or a Hall sensor.
- it is a magnetoresistive sensor.
- a redundant detection of an angular position about the at least one axis of rotation can also be provided.
- at least one magnetoresistive sensor and at least one Hall sensor are to be provided. These can then together form the at least one magneto-sensitive sensor. Due to the known attachment of the magnetic field transmitter to the rotatably movable element, a change in the direction of the magnetic field strength is identical to a change in the angular position.
- the magnetic field lines of the magnetic field generated by the magnetic field emitter incline accordingly. Furthermore, by detecting the magnitude of the magnetic field strength, a distance of the magnetic field transmitter from the magneto-sensitive sensor can be determined.
- the at least one magneto-sensitive sensor must, for example, have at least one Hall sensor.
- magneto-sensitive sensors is suitable for a measurement of both a position or a distance as well as an angle.
- These magnetosensitive sensors can detect both a change in the magnetic flux or the field strength and a rotation of the orientation of the magnetic flux or the magnetic field strength.
- these sensors can be used to detect both directly a change in the angular position or inclination of the rotationally movable element and to detect a linear displacement of the magnetic encoder. Exactly these two movements also makes a magnetic field transmitter arranged outside the rotation axis on the rotatably movable element.
- the at least one magnetic encoder is a permanent magnet.
- a permanent magnet By means of a permanent magnet can be provided in a particularly simple manner, a suitable magnetic encoder. A permanent magnet also requires no power supply.
- the permanent magnet is arranged outside at least one of the at least one axis of rotation of the at least one rotatably movable element.
- a structurally simple embodiment may, for example. Be to attach a small permanent magnet on the outer edge of the rotatable element or a mirror element. At such a location, the permanent magnet performs the largest linear motion. Thus, the best measurement accuracy can be achieved with such an arrangement. If you want to measure only a pure rotation of the magnetic field, it is sufficient to connect the magnet at any point with the rotatable element, it may also be in the axis of rotation. In the case of a change outside the axis of rotation, either a measurement of the change of the direction of the magnetic field strength or of the magnetic flux and / or the measurement of the amount of the magnetic field strength or of the magnetic flux can take place. This can basically be done by one as well as by two or rotation axes.
- a magneto-sensitive sensor may then be arranged in the vicinity of an end of the magnet facing away from the rotatably movable element or the mirror element. Already by a slight change in the angular position of the rotary movable element there are the direction changes of the magnetic field strongest. Consequently, the most sensitive and thus most accurate can be measured there.
- the at least one magneto-sensitive sensor is a magnetoresistive sensor.
- magnetoresistive sensors In addition to the already mentioned magnetoresistive sensors, other measuring principles can be used. For example, magneto-inductive sensors and Hall sensors are basically suitable. In these alternative measuring principles, however, typically the complexity of the measuring arrangement is greater or the technical complexity higher. Compared to the Hall sensors, the magnetoresistive sensors are characterized by a better signal-to-noise ratio and a lower sensitivity to environmental influences. A big advantage of the magnetoresistive sensors is the extremely compact construction of the entire measuring arrangement.
- the advantage can be provided that external influences, such as e.g. an ambient temperature or the earth's magnetic field do not interfere with the measurement.
- the at least one rotatably movable element is a reflective element, in particular a mirror element.
- the at least one rotatably movable element is a micromirror, and wherein the at least one magnetic encoder is formed as at least one applied to the micromirror layer.
- micromirrors or MEMS mirrors are generally known to the person skilled in the art.
- a magnetizable material can also be attached to the micromirror, which then permanently or permanently carries a magnetization once it has been magnetized.
- the magnetizable element can be applied, for example, already in the manufacturing process of the micromirror, for example in the form of a layer or a layer system or a plurality of layers. This could either be magnetized during the coating or subsequently according to the desired requirements.
- the magnetic encoder has a plurality of subregions, each subregion has a different magnetization direction.
- the magnetization can take place over the entire surface or in partial sections. With these subregions, strong gradients can then be generated in the field.
- the rotationally movable element about two axes of rotation in each case in a plurality of angular positions is rotatably movable.
- a corresponding movement for example.
- a laser beam take place in two spatial directions.
- the proposed device for example, by means of a single magnetoresistive sensor, an angular position about each of the axes of rotation can be determined.
- several magnetoresistive sensors may be present, which are positioned so that they are particularly well suited for detecting a change in the angular position about each axis of rotation.
- the device comprises two magneto-sensitive sensors, each detecting the angular position of the rotatably movable element about the same axis of rotation.
- the rotatably movable element is a rotatable about two mutually perpendicular axes of rotation each rotatable element, wherein the magnetic encoder is arranged on an angle bisector of the axes of rotation and outside of each of the axes of rotation.
- a magnetic field can be provided, which enables a detection about each of the axes of rotation by a rotational movement of the rotatably movable element.
- the device is a coordinate measuring machine or a microscope.
- the proposed device can be used particularly advantageously.
- the device further comprises an evaluation and / or control unit, which is adapted to at least one of the at least one magneto-sensitive sensor measured value, the angular position of the rotationally movable element determine.
- an evaluation and / or control unit which is adapted to at least one of the at least one magneto-sensitive sensor measured value, the angular position of the rotationally movable element determine.
- the evaluation and / or control unit is further adapted to, from the at least one of the at least one magneto-sensitive sensor detected reading with knowledge of the magnetic field given by the magnetic field a translational shift to determine the axis of rotation.
- the at least one magnetic field generator generates a magnetic field which is inhomogeneous at least in one area of the at least one magnetosensitive sensor.
- the magneto-sensitive sensor within a range of the at least one magneto-sensitive sensor is understood to mean that the magnetic field in the volume of the sensor and in its vicinity has the largest possible gradient in the magnetic flux or the magnetic field strength.
- the magneto-sensitive sensor should not be arranged in a region of the magnetic field which is linearized and essentially homogeneous with regard to its magnetic field strength or its magnetic flux. This would be a detection, in particular a change in the amount of magnetic field strength or magnetic Do not allow flow or make it possible with the required accuracy.
- a change in the direction of a magnetic field strength and a change in the magnitude of the magnetic field strength is detected, wherein by means of an evaluation and / or control unit from the Changing the direction of the magnetic field strength, an angular position of the rotationally movable element and / or from the change in the amount of the magnetic field strength, a position of the magnetic field sensor is determined.
- a position of the magnetic field sensor is determined, and wherein the position of the magnetic field transmitter redundant the angular position of the rotatable element is determined.
- a change in the direction of a magnetic field strength and a change in the magnitude of the magnetic field intensity are detected in parallel by means of the at least one magneto-sensitive sensor, wherein by means of an evaluation and / or control unit changing the direction of the magnetic field strength is an angular position tion of the rotationally movable element and from the change in the magnitude of the magnetic field strength with knowledge of the magnetic field given by the magnetic field a translational displacement of the axis of rotation is determined.
- FIG. 1 is a schematic representation of an embodiment of a device
- FIG. 2 is a schematic enlarged view of a portion of the magnetic field in the range of a magneto-sensitive sensor
- Fig. 3 is a schematic representation of another embodiment of the
- FIG. 4 is a schematic block diagram of one embodiment of a method.
- FIG. 1 shows an embodiment of a device 10 for inspecting a measurement object 12.
- the device 10 may be, for example, a coordinate measuring device.
- the device 10 has a rotatably movable element 16 which is rotationally movable about a rotation axis 14.
- the rotatably movable element 16 may in particular be a mirror element, in particular a Micromirrors act.
- the rotatably movable element 16 is movable into a plurality of angular positions 18, 20.
- a first angular position 18 is shown by solid lines.
- a second angular position 20 is shown in dashed lines.
- the position of the rotatably movable element 16 in the second angular position 20 is designated by the reference numeral 16 '.
- a magnetic encoder 22 is provided on the rotatably movable element.
- This magnetic encoder 22 is formed in the illustrated embodiment as a permanent magnet having a magnetic field 24.
- the magnetic encoder 22 is disposed outside the axis of rotation 14.
- a position of the magnetic field transmitter 22 in the second angular position 20 is indicated by the reference numeral 22 '.
- the device 10 has at least one magneto-sensitive sensor 26.
- the magneto-sensitive sensor 26 is connected in the illustrated embodiment with a schematically indicated evaluation and / or control unit 27.
- the evaluation and / or control unit 27 is designed to detect from the measured values acquired by the magnetosensitive sensor 26, i. at least one measured value representing a direction 28 of the magnetic field strength or of the magnetic flux and / or an amount 30 of the magnetic field strength or of the magnetic flux, the angular position 18, 20 of the rotatable element 16.
- the at least one magneto-sensitive sensor 26 may be both an individual sensor and an arrangement of a plurality of individual sensors in a known position, in particular angular position, relative to each other.
- FIG. 2 shows an enlarged detail of the illustration in FIG. 1.
- the magneto-sensitive sensor 26 is as stated above, preferably designed as a magnetoresistive sensor.
- Magnetoresistive sensors are generally known to those of ordinary skill in the art. They are capable of detecting both a direction and an amount of a magnetic flux or a magnetic field strength of a magnetic field. When operating in saturation, the magnetoresistive sensors are only capable of detecting a direction of a magnetic flux or a magnetic field strength of a magnetic field.
- When operating in Saturation of the magnetoresistive sensor may be provided an arrangement of a plurality of individual sensors in a known angular position relative to each other.
- At least one Hall sensor can also be provided, wherein the at least one magnetoresistive sensor and the at least one Hall sensor then jointly form the magnetosensitive sensor 26.
- the magneto-sensitive sensor 26 may be capable of detecting both a direction and an amount of magnetic flux of the magnetic field even when the magnetoresistive sensor is operated in saturation.
- the magneto-sensitive sensor 26 is arranged on the side of the magnetic field transmitter 22 facing away from the rotationally movable element 16. But it can also be, for example, a position 26 'selected.
- the magneto-sensitive sensor 26 is arranged in a region of the magnetic field 24 which is as inhomogeneous as possible, in particular with regard to the direction or orientation of the magnetic field strength or the magnetic flux.
- the inhomogeneity of the magnetic field 24 in the position 26 'enhances the sensitivity of the magneto-sensitive sensor 26 with respect to a tilting of the rotatable element 16.
- this sensitivity can be further enhanced, since the effective lever then tilting and a spatial displacement between the magnetic encoder 22 and the magneto-sensitive sensor 26 causes. With this combined movement, the magnetic field 24 of the magnetic field sensor 22 is then scanned.
- the magneto-sensitive sensor 26 is able, for each point of the magnetic field, which is due to the rotational movement of the element 16 on it, indicated by an arrow 28 direction of the magnetic field strength or the magnetic Capture the river. Furthermore, the magneto-sensitive sensor 26 is capable of detecting an amount 30 or a magnitude of the magnetic field strength or the magnetic flux. From the change in the direction 28 can be directly to a change in the angular position 18, 20th draw conclusions. From a change in the amount 30 can be inferred to a change in a distance 32 of the magnetic encoder 22 to the magneto-sensitive sensor 26.
- the angular position 18, 20 can also be determined redundantly.
- FIG. 3 shows a further embodiment of the device 10.
- the rotationally movable element 16 is a micromirror 36.
- the micromirror 36 is suspended in an outer frame 38 and an inner frame 40.
- the outer frame 38 is rigid or stationary.
- the inner frame 40 is rotatable relative to the outer frame 38 about the first axis of rotation 14.
- the micromirror 36 is rotatable relative to the inner frame 40 about a second axis of rotation 44.
- the micromirror 36 can be rotationally moved about two axes of rotation 14, 44.
- the axes of rotation 14, 44 have an angle bisector 46 between them.
- the rotation axes 14, 44 intersect at an intersection 48.
- the magnetic field sensor 22 is arranged on the bisector 46.
- the magnetic field transmitter 22 is arranged on an outermost edge or in a corner of the micromirror 36.
- a tilting of the micromirror 36 about one or both of the axes of rotation 14, 44 leads to the greatest possible deflection of the magnetic field transmitter 22, and thus to the largest possible change in the magnetic field 24 in the region of the magneto-sensitive sensor 26.
- a possible mounting location for the magneto-sensitive sensor 26 in the outer frame 38 is indicated at 26.
- the magneto-sensitive sensor may also be attached to the location 26 '.
- Another alternative mounting location outside of the outer frame 38 on one of the reflective surface of the micromirror 36 remote from the side of the micromirror 36 is indicated by the reference numeral 26 ".
- a plurality of magneto-sensitive sensors 26, 26 ', 26 can also be arranged, which are used to detect an angular position 18, 20 about the same Rotation axis 14, 44 or in each case about one of the axes of rotation 14, 44 are formed. In this way, a redundancy of the measurement and thus its accuracy can be further increased.
- a generated magnetic field 24 can be made more suitable or amplified.
- an arrangement optimized for each of the axes of rotation can be provided in order to optimize the measurement signals obtained magnetosensitive sensor 26, 26 ', 26 "may in particular be chosen so that in the subsequent calculation - no matter whether analog or digital - the direction information no zero crossings in the signal for the denominator of a division operation to be calculated (division) are to be expected because this Measurement result unstable and thus can make inaccurate.
- a magnetized layer 42 or coating is attached to the micromirror 36 as the magnetic field transmitter 22.
- a magnetized layer or coating can additionally be attached to the inner frame 40, in particular also with a different orientation from the coating on the micromirror 36.
- the magnetization can take place over the entire surface or else in subsections or subregions. It may be different at the micromirror 36 and / or the inner frame 40 in partial areas. With these subregions, strong gradients can then be generated in the field, which offers advantages for the measurement if the respective sensor is arranged to match the areas.
- the measured values of the magneto-sensitive sensor 26 can also be corrected in order to be able to compensate directly for errors that may occur due to geometry influences or field or measurement errors via the correction.
- This correction data can be obtained either from measurements or from simulation data or empirically determined and then transferred to other systems accordingly. This may, for example, in the sense of "Computer Aided Accuracy "(CAA) corrections, which are applied in particular to other fields in coordinate measuring machines.
- CAA Computer Aided Accuracy
- the magnetic field 24 is not needed, for example, on the side of the magnetic field transmitter 22 facing away from the magneto-sensitive sensor 26. Furthermore, it may be provided to shield in such a way that upon actuation of the micromirror 36, the magnetic fields caused by the currents occurring there do not affect the measurement.
- FIG. 4 shows an embodiment of a method 50 for detecting an angular position 18, 20 of a rotationally movable element 16 in a device 10, in particular a coordinate measuring machine or a microscope.
- the method begins in a start step 52. This is followed by a step 54 of providing a device in one of the embodiments described above.
- the at least one magneto-sensitive sensor 26 can have at least one magnetoresistive sensor and at least one Hall sensor in order to enable detection of both a direction of the magnetic field and an amount of the magnetic field by the magneto-sensitive sensor.
- the method splits, as shown by an arrow 56.
- a direction of the magnetic field 24 can be detected by the magneto-sensitive sensor 26.
- an amount of the magnetic field 24 may be detected by the magneto-sensitive sensor 26 in a step 60.
- an evaluation 62 takes place in such a way that an angular position 18, 20 of the rotatable element 16 is deduced from the detected direction in step 58.
- step 64 an evaluation is made that the amount detected in the step 60 correlates with a distance of the magneto-sensitive sensor 26 and the magnetic encoder 22 and from the known position of the magnetic encoder 22 on the rotatable element 16 and the known position of the magneto-sensitive sensor 26 on the known position of the axis of rotation 14 on the angular position 18, 20 of the rotatable element 16 is inferred.
- a redundant measurement can be provided.
- a correction of the measurement results can then take place and, in particular, the redundant measurement can be used to provide, for example, by means of an averaging, an ultimately output measured value.
- the redundant measurement can be used to provide, for example, by means of an averaging, an ultimately output measured value.
- the method then ends in a step 68.
- a nominal-actual comparison with a predetermined desired value for the tilt can also take place.
- the method in a control loop for a position or position adjustment as a measuring system - be integrated - analogous to an angle encoder - so as to enable a highly accurate position or position control.
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
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Abstract
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DE112012006989.7T DE112012006989B4 (de) | 2012-12-14 | 2012-12-14 | Vorrichtung und Verfahren zum Erfassen einer Winkelposition |
PCT/EP2012/075646 WO2014090343A1 (de) | 2012-12-14 | 2012-12-14 | Vorrichtung und verfahren zum erfassen einer winkelposition |
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PCT/EP2012/075646 WO2014090343A1 (de) | 2012-12-14 | 2012-12-14 | Vorrichtung und verfahren zum erfassen einer winkelposition |
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WO2014090343A1 true WO2014090343A1 (de) | 2014-06-19 |
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Cited By (2)
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US11555714B2 (en) | 2018-10-15 | 2023-01-17 | Electricfil Automotive | Method and sensor system for determining a relative angular position between two parts, and method for manufacturing a magnetic body |
US11668587B2 (en) | 2018-06-15 | 2023-06-06 | Electricfil Automotive | Method for determining a relative angular position between two parts |
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US11668587B2 (en) | 2018-06-15 | 2023-06-06 | Electricfil Automotive | Method for determining a relative angular position between two parts |
US11555714B2 (en) | 2018-10-15 | 2023-01-17 | Electricfil Automotive | Method and sensor system for determining a relative angular position between two parts, and method for manufacturing a magnetic body |
Also Published As
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DE112012006989B4 (de) | 2019-07-11 |
DE112012006989A5 (de) | 2015-06-18 |
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