Magnetic measuring assembly for detecting a movement of a linearly movable component

Abstract

The invention relates to a magnetic measuring assembly (10) for detecting a movement of a linearly movable component (1), comprising a magnet assembly (14), which is connected to the linearly movable component (1) and which can be moved along a movement axis (BA) in a first direction (BR), and at least one sensor (11), which comprises at least one measuring means assembly and which is spaced from the magnet assembly (14) perpendicularly to the first direction (BR) in a second direction (LR) by means of an air gap (LS). The magnet assembly (14) comprises at least two permanent magnets (14A, 14B). A first permanent magnet (14A) is magnetized in a first magnetization direction (MR1) at a first tilting angle (KW1) relative to the second direction (LR), and a second permanent magnet (14B) is magnetized in a second magnetization direction (MR2) at a second tilting angle (KW2) relative to the second direction (LR), wherein the first tilting angle (KW1) is tilted in the first direction (BR) or opposite the first direction (BR), and the second tilting angle (KW2) is tilted in the first direction (BR) or opposite the first direction (BR). The at least one sensor (11) is designed to detect at least one magnetic variable on a measuring plane defined by the first direction (BR) and the second direction (LR) and output at least one output signal (AS) which represents the distance traveled by the movable component (1).

Description

[0001] Description

[0002] title

[0003] component

[0004] The invention relates to a magnetic measuring arrangement for detecting the movement of a linearly movable component.

[0005] Magnetic measuring arrangements comprising at least one sensor are known from the prior art. These are used, for example, in braking systems to detect the movement of a driver's foot on a brake pedal via an input rod. To detect the path of the input rod, a magnetic angle of a magnetic field vector is detected by the at least one sensor. Furthermore, magnetic measuring arrangements for detecting the movement of a linearly movable component are known, in which differential magnetic linear position sensors evaluate a magnetic angle of a differential flux density vector in a two-dimensional plane. Using suitable transformation methods, the magnetic angle is translated into a linear output signal (e.g., SENT or PWM interface).

[0006] From DE 10 2012 214 648 B4 a position detection system is known which comprises a magnetic field source with a dipole moment in a direction along a z-axis, and a sensor module which is spaced from a center of the dipole moment by a distance yO along a y-axis and by a distance zO from a center of the dipole moment along a z-axis. At least one of the magnetic field source and the sensor module is designed to move relative to the other along a path in the plane y = yO. The sensor module is designed to determine a relative position of the magnetic field source to the sensor module with respect to the path from a ratio of a gradient dBz / dx to a gradient dBz / dy, where Bz is a magnetic field component assigned to the permanent magnet. An x-axis, the y-axis and the z-axis run at right angles to one another.

[0007] Disclosure of the invention

[0008] The magnetic measuring arrangement for detecting the movement of a linearly movable component with the features of independent patent claim 1 has the advantage that the measuring range of the magnetic measuring arrangement can be increased by clearly assigning a measurement signal to a traveled distance of the movable component. This prevents ambiguity in the measurement signal with respect to the measured position or the traveled distance.

[0009] In embodiments of the magnetic measuring arrangement, cost-effective, smaller permanent magnets with less magnetic material can be used. Preferably, the permanent magnets can have homogeneous magnetization and can therefore be manufactured more easily and cost-effectively.

[0010] Embodiments of the present invention provide a magnetic measuring arrangement for detecting the movement of a linearly movable component, comprising a magnet arrangement which is connected to the linearly movable component and is movable with the component along a linear movement axis in a first direction, and at least one sensor which comprises at least one measuring device arrangement and is arranged perpendicular to the first direction in a predetermined second direction and spaced from the magnet arrangement by an air gap. The magnet arrangement comprises at least two permanent magnets which are magnetized in different magnetization directions. A first permanent magnet is magnetized in a first magnetization direction which has a predeterminable first tilt angle relative to the second direction.A second permanent magnet is magnetized in a second magnetization direction, which has a predeterminable second tilt angle relative to the second direction. Here, the first tilt angle is tilted in the first direction or opposite to the first direction, and the second tilt angle is tilted in the first direction or opposite to the first direction. The at least one sensor is designed to detect at least one magnetic variable in a measuring plane spanned by the first direction and the second direction and to output at least one corresponding output signal representing a distance traveled by the movable component.

[0011] The core of the invention consists in a tilted magnetization of the at least two permanent magnets in the measuring plane of the at least one sensor, relative to the first direction, which corresponds to a direction of movement of the linearly movable component.

[0012] An air gap is understood here to be a magnetic air gap, in which a material with no or only low permeability, such as aluminum, can be arranged. The at least one magnetic quantity to be detected preferably corresponds to the magnetic flux density or the magnetic field strength of the magnetic field generated by the at least two permanent magnets.

[0013] In this case, the at least one sensor can be understood as an electrical unit, preferably an ASIC component (ASIC: Application Specific Integrated Circuit), with at least one evaluation and control unit and at least one measuring device arrangement. In this case, the at least one evaluation and control unit can be designed as part of the sensor and integrated into it. Alternatively, the at least one evaluation and control unit can be designed as a separate unit and arranged outside the sensor. In addition, an evaluation and control unit can be integrated into the sensor and an evaluation and control unit can be arranged outside the sensor. The at least one measuring device arrangement comprises measuring devices which are sensitive to the two mutually perpendicular components of the spanned measuring plane and the magnetic field generated by the at least two permanent magnets.In addition, the measuring means can be designed to record instantaneous values ​​of the at least one magnetic variable to be recorded along the respective vertical component and to output them to the evaluation and control unit. The at least one evaluation and control unit can be designed to determine, based on value pairs of the instantaneous values ​​of the at least one magnetic variable to be recorded, a current magnetic field vector with a current magnetic angle and a current length which corresponds to a current amplitude of the magnetic variable. Of course, the at least one evaluation and control unit can also perform mathematical transformations, such as linearization, offset adjustment, etc., to determine the current magnetic angle of the at least one magnetic variable and / or the current amplitude of the at least one magnetic variable.Preferably, the at least one measuring device arrangement can comprise at least two measuring devices embodied as Hall sensors, each having a detection direction, or at least one measuring device embodied as a Hall sensor with at least two detection directions. The measuring devices detect the at least one magnetic variable to be detected or a change in the at least one magnetic variable and convert this into an electrical sensor signal. Based on the current magnetic angle of the at least one magnetic variable and / or the current amplitude of the at least one magnetic variable, the at least one sensor can generate and output the corresponding at least one output signal, which represents the distance traveled by the movable component.

[0014] To form a redundant magnetic measuring arrangement, at least two separate sensors, each with at least one measuring device arrangement, can be arranged perpendicular to the first direction in a predetermined second direction spaced apart from the magnet arrangement by an air gap and designed to each output at least one output signal which represents a travelled path of the movable component.

[0015] The measures and further developments listed in the dependent claims enable advantageous improvements to the magnetic measuring arrangement specified in independent patent claim 1.

[0016] It is particularly advantageous if the first tilt angle and the second tilt angle are tilted in the same direction. In this case, the second tilt angle can correspond to a reflection of the first tilt angle on the movement axis and can be easily implemented. For example, two permanent magnets with identical magnetization directions can be produced which can be mounted on the movable component with a rotation of 180° to each other around the longitudinal axis. Alternatively, the first tilt angle and the second tilt angle can be tilted in different directions. For example, the first tilt angle can be tilted in the first direction or direction of movement and the second tilt angle can be tilted against the first direction or direction of movement. Alternatively, the first tilt angle can be tilted against the first direction or direction of movement and the second tilt angle can be tilted in the first direction or direction of movement.

[0017] In an advantageous embodiment of the magnetic measuring arrangement, the magnitude of each of the two tilt angles can be specified within a range of 0° to 45°. A tilt angle of 0° does not correspond to a tilt, but rather to a magnetization of the at least two permanent magnets in or against the second direction, which corresponds to an air gap direction, i.e., an extension direction of the air gap between the magnet arrangement and the at least one sensor.

[0018] In a further advantageous embodiment of the magnetic measuring arrangement, the magnitudes of the two tilt angles can differ from each other within a range of 0° to 10°. Preferably, the magnetization angles of the at least two permanent magnets are equal in magnitude.

[0019] In a further advantageous embodiment of the magnetic measuring arrangement, the at least one measuring device arrangement of the at least one sensor can be designed to detect a current magnetic field vector, which is dependent on the movement of the linearly movable component and represents the at least one magnetic variable to be detected. The at least one sensor can be further designed to determine a current magnetic angle of the at least one magnetic variable and / or a current amplitude of the at least one magnetic variable from the detected current magnetic field vector or from a variable generated from the current magnetic field vector by at least one mathematical transformation, and to output at least one corresponding output signal.In a further advantageous embodiment of the magnetic measuring arrangement, the at least one sensor can comprise at least two measuring device arrangements, which are spaced apart by a predetermined distance in the first direction and form a measuring pair. This enables differential and interference-field-robust detection of the at least one magnetic variable.In this case, the at least one sensor can be further designed to determine a current magnetic difference field vector from the detected current magnetic field vectors of the at least two measuring device arrangements of at least one corresponding measuring pair or from quantities generated by at least one mathematical transformation from the current magnetic field vectors of the at least two measuring device arrangements of the at least one corresponding measuring pair, and to determine a current magnetic angle of the at least one magnetic quantity and / or a current amplitude of the at least one magnetic quantity from the determined current magnetic difference field vector and to output corresponding electrical output signals. This means that the magnetic difference field vector is measured in the two-dimensional measuring plane, which is spanned by the first direction or the direction of movement and the second direction or air gap direction.From this difference field vector, the magnetic field angle can be determined and processed by further transformations (e.g. offset adjustment, linearization) to form at least one output signal of the sensor.

[0020] In a further advantageous embodiment of the magnetic measuring arrangement, the at least one sensor can be designed to compare a current magnetic angle with a first threshold value which sets an upper limit for the measuring range, and to set the electrical output signal to a predetermined first output value if the current magnetic angle exceeds the predetermined first threshold value. Particularly when used in braking systems, a linear output signal cannot always be generated and output over an entire measuring range, but rather only within a restricted measuring range. The first threshold value can be used to freeze the at least one output signal above the restricted measuring range, i.e. to set it to the first output value. This can prevent ambiguity in the at least one output signal.Additionally or alternatively, the at least one sensor can be configured to compare a current magnetic angle with a second threshold value, which defines the lower limit of the measuring range, and to set the electrical output signal to a predefined second output value if the current magnetic angle falls below the predefined second threshold value. The second output value can be used to compensate for manufacturing tolerances and / or tolerances that occur over the service life of the magnetic measuring arrangement, particularly when used for pedal travel detection.

[0021] In a further advantageous embodiment of the magnetic measuring arrangement, the at least one sensor can be designed to compare the current amplitude of the at least one magnetic variable with a predefined third threshold value and to set the electrical output signal to a predefined third output value if the current amplitude falls below the predefined third threshold value. If the amplitude of the detected at least one magnetic variable falls below the third threshold value, unambiguous detection of the magnetic variable is difficult due to noise. Therefore, the at least one output signal is frozen at the third output value without taking the current magnetic angle into account in order to avoid ambiguous output signals and increase the robustness of the magnetic measuring arrangement.

[0022] In a further advantageous embodiment of the magnetic measuring arrangement, a measuring range of the at least one sensor can be specified such that it only partially covers a movement path of the linearly movable component with the magnet arrangement. Thus, embodiments of the magnetic measuring arrangement can be used in pedal travel detection in braking systems, for example, to detect a driver's braking request in a front pedal travel range, since from a certain pedal travel onward, it can be concluded that full braking has occurred, and in this case, the at least one output signal of the magnetic measuring arrangement for the rear pedal travel range is no longer as important.

[0023] Embodiments of the magnetic measuring arrangement advantageously enable differential magnetic measurement under given conditions with regard to minimum differential flux density (ASIC requirements), magnet geometry (mechanical requirements) and measuring range (functional requirements). By using at least two permanent magnets with different magnetization directions, the unambiguous measuring range for detecting the pedal travel of a brake pedal can be increased to a pedal travel of more than 25 mm. In the unambiguous measuring range, the differentially detected flux density can preferably have a sufficiently high value of more than 4 mT / mm. For the first threshold value, which sets the upper limit for the unambiguous measuring range, the at least one output signal above the restricted measuring range can be frozen, i.e. set to the first output value, which is used for the remaining pedal travel up to approx.45mm can be output.

[0024] An embodiment of the invention is illustrated in the drawings and explained in more detail in the following description. In the drawings, like reference numerals designate components or elements that perform the same or similar functions.

[0025] Short description of the drawings

[0026] Fig. 1 shows a schematic and partial representation of an embodiment of a magnetic measuring arrangement according to the invention for detecting the movement of a linearly movable component.

[0027] Fig. 2 shows a schematic representation of an embodiment of a magnet arrangement for the magnetic measuring arrangement according to the invention from Fig. 1.

[0028] Fig. 3 shows a schematic representation of an embodiment of a sensor for the magnetic measuring arrangement according to the invention from Fig. 1.

[0029] Fig. 4 shows a schematic representation of a detected magnetic field vector.

[0030] Fig. 5 shows a schematic representation of a detected magnetic differential field vector. Fig. 6 shows a schematic magnetic angle-displacement characteristic diagram with several magnetic angle curves for different tilt angles as a function of the distance traveled by the moving body from Fig. 1.

[0031] Fig. 7 shows a schematic characteristic diagram of a magnetic angle curve and an amplitude curve of a detected magnetic quantity as a function of the path traveled by the moving body from Fig. 1 .

[0032] Fig. 8 shows a schematic characteristic diagram of an output signal of the magnetic measuring arrangement from Fig. 1 as a function of the distance traveled by the linearly movable component.

[0033] Embodiments of the invention

[0034] 1 to 3, the illustrated embodiment of a magnetic measuring arrangement 10 according to the invention for detecting the movement of a linearly movable component 1 comprises a magnet arrangement 14 which is connected to the linearly movable component 1 and is movable with the component 1 along a linear movement axis BA in a first direction BR, and at least one sensor 11 which comprises at least one measuring device arrangement 12 and is arranged perpendicular to the first direction BR in a predetermined second direction LR by an air gap LS at a distance from the magnet arrangement 14. The magnet arrangement 14 comprises at least two permanent magnets 14A, 14B which are magnetized in different magnetization directions MR1, MR2. A first permanent magnet 14A is magnetized in a first magnetization direction MR1 which has a predeterminable first tilt angle KW1 relative to the second direction LR.A second permanent magnet 14B is magnetized in a second magnetization direction MR2, which has a predeterminable second tilt angle KW2 relative to the second direction LR. Here, the first tilt angle KW1 is tilted in the first direction BR or against the first direction BR, and the second tilt angle KW2 is tilted in the first direction BR or against the first direction BR. The at least one sensor 11 is designed to detect at least one magnetic variable in a measuring plane spanned by the first direction BR and the second direction LR and to output at least one corresponding output signal AS, which represents a traveled distance PW of the movable component 1.

[0035] In the illustrated embodiment, the linearly movable component 1 corresponds to an input rod 1A, which is coupled to a brake pedal (not shown in more detail) of a braking system of a vehicle. The first direction BR corresponds to a direction of movement of the input rod 1A, which moves along the linear movement axis BA and is movably mounted in a hydraulic unit 3 of the braking system. The second direction LR corresponds to an air gap direction, i.e. an extension direction of the air gap LS between the magnet arrangement 14 and the at least one sensor 11. This means that the measuring plane for detecting the at least one magnetic variable is spanned by the direction of movement and the air gap direction. As can also be seen from Fig. 1, the sensor 11 in the illustrated embodiment is arranged on a circuit carrier 18, which is held in an opening in the hydraulic unit 3 via a carrier 16.

[0036] 1 and 2, the magnet arrangement 14 in the illustrated embodiment has a total length ML and two permanent magnets 14A, 14B, which are arranged at a predetermined distance MA in the first direction BR or direction of movement from one another on the linearly movable component 1 designed as an input rod 1A. As can be further seen from FIGS. 1 and 2, the first tilt angle KW1 of the first magnetization direction MR1 of the first permanent magnet 14A and the second tilt angle KW2 of the second magnetization direction MR2 of the second permanent magnet 14B are tilted in the same direction, namely in the first direction BR. In this case, the second tilt angle KW2 in the illustrated embodiment corresponds to a reflection of the first tilt angle KW1 on the movement axis BA. This means that the two permanent magnets 14A, 14B are manufactured with identical magnetizations.During assembly, the second permanent magnet 14B is rotated by 180° about its longitudinal axis or about the movement axis BA relative to the first permanent magnet 14A on the movable component 1. The value of the two tilt angles KW1, KW2 can each be specified in a range from 0° to 45°. In the illustrated embodiment of the magnet arrangement 14, the value of the two tilt angles KW1, KW2 corresponds to approximately 30° each. Furthermore, a tilt angle of 0° corresponds to no tilt. As can be seen in particular from Fig. 3, a first tilt angle KW1 of 0° corresponds to a magnetization direction MR+z of the first permanent magnet 14A in the second direction LR or in the positive z-direction, shown in dashed lines. A second tilt angle KW2 of 0° corresponds to a magnetization direction MR-z of the second permanent magnet 14B against the second direction LR or in the negative z-direction, shown in dashed lines.In the illustrated embodiment, the two tilt angles KW1 and KW2 have the same values. However, it is also possible to specify different tilt angles KW1 and KW2, which can differ from each other within a range of 0° to 10°.

[0037] In alternative embodiments of the magnetic measuring arrangement 10 (not shown), the first tilt angle KW1 of the first magnetization direction MR1 of the first permanent magnet 14A and the second tilt angle KW2 of the second magnetization direction MR2 of the second permanent magnet 14B are tilted in different directions. For example, the first tilt angle KW1 can be tilted in the first direction BR or direction of movement, and the second tilt angle KW2 can be tilted against the first direction BR or direction of movement. Alternatively, the first tilt angle KW1 can be tilted against the first direction BR or direction of movement, and the second tilt angle KW2 can be tilted in the first direction BR or direction of movement.

[0038] 1 and 3, the magnetic measuring arrangement 10 in the illustrated embodiment comprises only one sensor 11 with at least one measuring device arrangement 12 and an evaluation and control unit 13. The at least one measuring device arrangement 12 comprises measuring devices which are sensitive to the two mutually perpendicular components of the spanned measuring plane and the magnetic field generated by the two permanent magnets 14A, 14B. A first measuring device records an instantaneous value MGx of the at least one magnetic variable to be recorded along the first direction BR or the direction of movement or a longitudinal axis x, and a second measuring device records an instantaneous value MGz of the at least one magnetic variable to be recorded along the second direction LR or the air gap direction or a vertical axis z. The evaluation and control unit 13 is designed based on the device shown in Fig.4, a current magnetic field vector MG with a current magnetic angle MW and a current length corresponding to a current amplitude AMP of the magnetic quantity to be detected is determined, and a corresponding output signal AS is output. The magnetic field vector MG depends on the movement of the linearly movable component 1 and represents the at least one magnetic quantity to be detected. Of course, the evaluation and control unit 13 can also perform mathematical transformations, such as linearization, offset adjustment, etc., to determine the current magnetic angle MW of the at least one magnetic quantity and / or the current amplitude AMP of the at least one magnetic quantity.

[0039] As can be further seen from Fig. 3, the sensor 11 in the illustrated embodiment of the magnetic measuring arrangement 10 comprises two measuring device arrangements 12A, 12B, each having a first measuring device and a second measuring device. The two measuring device arrangements 12A, 12B are spaced apart from one another by a predetermined distance in the first direction x or direction of movement and form a measuring pair. The sensor 11 is further configured to determine a current magnetic difference field vector MGd from the current magnetic field vectors MG of the two measuring device arrangements 12A, 12B of the corresponding measuring pair, and to determine a current magnetic angle MW of the at least one magnetic variable and / or a current amplitude AMP of the at least one magnetic variable from the determined current magnetic difference field vector MGd, and to output a corresponding output signal AS.

[0040] In order to determine the magnetic difference field vector MGd, the evaluation and control unit 13 is designed to determine a first instantaneous value MGdx along the first direction BR or the direction of movement or from an instantaneous value MGx of the magnetic field vector MG of the at least one magnetic quantity to be recorded, which is recorded by the first measuring device arrangement 12A, running along the first direction, and from an instantaneous value MGx of the magnetic field vector MG of the at least one magnetic quantity to be recorded, which is recorded by the second measuring device arrangement 12B.a longitudinal axis x of the magnetic difference field vector MGd and to determine a second instantaneous value MGdz along the second direction LR or the air gap direction or the vertical axis z of the magnetic difference field vector MGd from an instantaneous value MGz of the magnetic field vector MG of the at least one magnetic quantity to be detected, as detected by the first measuring device arrangement 12A, and from an instantaneous value MGz of the magnetic field vector MG of the at least one magnetic quantity to be detected, as detected by the second measuring device arrangement 12B. The evaluation and control unit 13 is further designed based on the embodiment shown in Fig.5, the magnetic difference field vector MGd is determined with a current magnetic angle MW and a current length corresponding to a current amplitude AMP of the magnetic variable, and a corresponding output signal AS is output. Of course, the evaluation and control unit 13 can also perform mathematical transformations, such as linearization, offset adjustment, etc., to determine the current magnetic angle MW of the at least one magnetic variable and / or the current amplitude AMP of the at least one magnetic variable.

[0041] Fig. 6 shows three curves of the magnetic angle MW detected by the sensor 11 for three different tilt angles KW1, KW2 of the two permanent magnets 14A, 14B of the magnet arrangement 14. In this case, the tilt angles KW1, KW2 of the magnetization of the two permanent magnets 14A, 14B have a tilt of 0° in the characteristic curve K0 of the magnetic angle MW shown in dotted lines. The tilt angles KW1, KW2 of the magnetization of the two permanent magnets 14A, 14B have a tilt of 15° in the characteristic curve K15 of the magnetic angle MW shown in dashed lines. In the characteristic curve K30 of the magnetic angle MW shown in solid lines, the tilt angles KW1, KW2 of the magnetization of the two permanent magnets 14A, 14B have a tilt of 30°. As can be further seen from Fig. 6, the angular range in relation to the path of the linearly movable component 1 increases for larger tilt angles KW1, KW2 of the magnetization, but at the expense of the linearity (e.g. at approx.5mm-10mm). Therefore, tilt angles of more than 45° are disadvantageous.

[0042] The following describes how the evaluation and control unit 13 generates the output signal AS with reference to Figs. 7 and 8. Here, the tilt angles KW1, KW2 of the magnetization of the two permanent magnets 14A, 14B have a tilt of 30°. The characteristic curve K30 shows the corresponding course of the measuring angle MW of the detected magnetic quantity or of the difference field vector MGd over the path PW of the input rod 1A, which here corresponds to the pedal travel of a brake pedal. In addition, Fig. 7 shows a characteristic curve KMG, which shows a course of the amplitude AMP of the detected magnetic quantity or of the difference field vector MGd.

[0043] As can be further seen from Figs. 7 and 8, in the illustrated embodiment of the magnetic measuring arrangement 10, a measuring range MB of the sensor 11 is specified such that it only partially covers a movement path of the linearly movable component 1 with the magnet arrangement 14. In the illustrated embodiment, the measuring range MB of the sensor 11 lies between 0 and approximately 20 mm, while the movement path of the linearly movable component 1 has a possible travel of approximately 55 mm.

[0044] As can be further seen from Figs. 7 and 8, in the illustrated embodiment, a first threshold value SW1 is predefined, which defines the upper limit of the measuring range MB of the sensor 11. Here, the sensor 11 is designed to compare a current magnetic angle MW with the first threshold value SW1 and to set the output signal AS to a predefined first output value AW1 if the current magnetic angle MW exceeds the predefined first threshold value SW1. This results in a first clamp range C1 in which the output signal AS is set to the first output value AW1.

[0045] As can also be seen from Figs. 7 and 8, in the illustrated embodiment, a second threshold value SW2 is specified, which lower limits the measuring range MB of the sensor 11. In this case, the sensor 11 is designed to compare a current magnetic angle MW with the second threshold value SW2 and to set the output signal AS to a predetermined second output value AW2 if the current magnetic angle MW falls below the predetermined second threshold value SW2. This results in a second clamp range C2, in which the output signal AS is set to the second output value AW2. The second clamp range C2 is intended to prevent mechanical tolerances occurring during the service life of the magnetic measuring arrangement 10 from having a detrimental effect on the output signal AS.

[0046] As can further be seen from Figs. 7 and 8, in the illustrated embodiment, a third threshold value SW3 is predefined, which monitors the current amplitude AMP of the at least one magnetic variable or of the magnetic difference field vector MGd. Here, the sensor 11 is designed to compare the current amplitude AMP with a predefined third threshold value SW3 and to set the electrical output signal AS to a predefined third output value AW3 if the current amplitude AMP falls below the predefined third threshold value SW3. This results in a third clamp range C3, in which the output signal AS is set to the third output value AW3. The third clamp range C3 is intended to prevent noise from having a detrimental effect on the output signal AS.In the illustrated embodiment, the first output value AW1 and the third output value AW3 differ, so that a distinction is possible as to whether the magnetic measuring arrangement 10 has reached the end of the measuring range or whether the amplitude AMP of the at least one magnetic quantity or of the magnetic difference field vector MGd is too small to carry out a robust and unambiguous evaluation of the magnetic angle MW.

Claims

Claims 1. A magnetic measuring arrangement (10) for detecting the movement of a linearly movable component (1), comprising a magnet arrangement (14) which is connected to the linearly movable component (1) and is movable with the component (1) along a linear movement axis (BA) in a first direction (BR), and at least one sensor (11) which comprises at least one measuring device arrangement (12) and is arranged perpendicular to the first direction (BR) in a predetermined second direction (LR) by an air gap (LS) at a distance from the magnet arrangement (14), wherein the magnet arrangement (14) comprises at least two permanent magnets (14A, 14B) which are magnetized in different magnetization directions (MR1, MR2), wherein a first permanent magnet (14A) is magnetized in a first magnetization direction (MR1) which has a predeterminable first tilt angle (KW1) relative to the second direction (LR),wherein a second permanent magnet (14B) is magnetized in a second magnetization direction (MR2) which has a predeterminable second tilt angle (KW2) relative to the second direction (LR), wherein the first tilt angle (KW1) is tilted in the first direction (BR) or against the first direction (BR) and the second tilt angle (KW2) is tilted in the first direction (BR) or against the first direction (BR), wherein the at least one sensor (11) is designed to detect at least one magnetic variable in a measuring plane spanned by the first direction (BR) and the second direction (LR) and to output at least one corresponding output signal (AS) which represents a traveled distance (PW) of the movable component (1).

2. Magnetic measuring arrangement (10) according to claim 1, characterized in that the first tilt angle (KW1) and the second tilt angle (KW2) are tilted in the same direction.

3. Magnetic measuring arrangement (10) according to claim 2, characterized in that the second tilt angle (KW2) corresponds to a reflection of the first tilt angle (KW1) on the movement axis (BA) 4. Magnetic measuring arrangement (10) according to claim 1, characterized in that the first tilt angle (KW1) and the second tilt angle (KW2) are tilted in different directions.

5. Magnetic measuring arrangement (10) according to one of claims 1 to 4, characterized in that an amount of the two tilt angles (KW1, KW2) is each predetermined in a range from 0° to 45°.

6. Magnetic measuring arrangement (10) according to claim 5, characterized in that the amounts of the two tilt angles (KW1, KW2) differ from one another in a range from 0° to 10°.

7. Magnetic measuring arrangement (10) according to one of claims 1 to 6, characterized in that the at least one measuring means arrangement (12) of the at least one sensor (11) is designed to detect a current magnetic field vector (MG) which is dependent on the movement of the linearly movable component (1) and represents the at least one magnetic variable to be detected.

8. Magnetic measuring arrangement (10) according to claim 7, characterized in that the at least one sensor (11) is further designed to determine a current magnetic angle (MW) of the at least one magnetic variable and / or a current amplitude (AMP) of the at least one magnetic variable from the detected current magnetic field vector (MG) or from a variable generated by at least one mathematical transformation from the current magnetic field vector (MG) and to output the at least one corresponding output signal (AS).

9. Magnetic measuring arrangement (10) according to one of claims 1 to 7, characterized in that the at least one sensor (11) comprises at least two measuring device arrangements (12) which are spaced apart from one another by a predetermined distance in the first direction (x) and form a measuring pair.

10. Magnetic measuring arrangement (10) according to claim 9, characterized in that the at least one sensor (11) is further designed to determine a current magnetic difference field vector (MGd) from the detected current magnetic field vectors (MG) of the at least two measuring device arrangements (12) of at least one corresponding measuring pair (12A, 12B) or from quantities generated by at least one mathematical transformation from the current magnetic field vectors (MG) of the at least two measuring device arrangements (12) of the at least one corresponding measuring pair (12A, 12B) and to determine a current magnetic angle (MW) of the at least one magnetic quantity and / or a current amplitude (AMP) of the at least one magnetic quantity from the determined current magnetic difference field vector (MGd) and to output the at least one corresponding output signal (AS).

11. Magnetic measuring arrangement (10) according to one of claims 8 to 10, characterized in that the at least one sensor (11) is designed to compare a current magnetic angle (MW) with a first threshold value (SW1) which limits the measuring range (MB) upwards, and to set the electrical output signal (AS) to a predetermined first output value (AW1) if the current magnetic angle (MW) exceeds the predetermined first threshold value (SW1).

12. Magnetic measuring arrangement (10) according to one of claims 8 to 11, characterized in that the at least one sensor (11) is designed to compare a current magnetic angle (MW) with a second threshold value (SW2) which limits the measuring range (MB) downwards, and to set the electrical output signal (AS) to a predetermined second output value (AW2) if the current Magnetic angle (MW) falls below the specified second threshold value (SW2) 13. Magnetic measuring arrangement (10) according to one of claims 8 to 12, characterized in that the at least one sensor (11) is designed to compare the current amplitude (AMP) of the at least one magnetic variable with a predetermined third threshold value (SW3) and to set the electrical output signal (AS) to a predetermined third output value (AW3) if the current amplitude (AMP) falls below the predetermined third threshold value (SW3).

14. Magnetic measuring arrangement (10) according to one of the claims 1 to 13, characterized in that a measuring range (MB) of the at least one sensor (11) is predetermined such that it only partially covers a movement path of the linearly movable component (1) with the magnet arrangement (14).

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