Inductively and optically evaluated movable element of a position sensor

Abstract

Movable element (10) for a position sensor (100), in particular for a steer-by-wire system (201) for a vehicle (200), having: - at least one wing (12) for inductively detecting the position of the movable element (10), - a measurement device (20) based on a further physical measurement principle for detecting the position of the movable element (10).

Description

[0001] Inductively and optically evaluated moving element of a position sensor

[0002] Description

[0003] The invention relates to a movable element having the features of the first independent patent claim, a position sensor having the features of the second independent patent claim, a method having the features of the third independent patent claim, a computer program product having the features of the independent computer program product claim, a computer-readable data carrier having the features of the independent patent claim relating to a computer-readable data carrier, a control unit having the features of the independent patent claim relating to a control unit, and a vehicle having the features of the independent vehicle claim.

[0004] Inductive position sensors are known, which operate on the physical measuring principle of induction. These can be used, for example, to determine the (rotational) position, especially the angle, of a rotational axis. This can be relevant, for example, in a vehicle's steering system, such as a steer-by-wire system.

[0005] The current state of the art has disadvantages. Inductive position sensors (and other known position sensors), at least theoretically, can be subject to common-mode interference (so-called "common cause failure") (which can particularly affect the functionality of the position sensor), which can be traced back to a common cause. For example, strong electric and / or magnetic fields can affect an (inductive) position sensor, causing it to function at least less effectively.

[0006] It is therefore an object of the present invention to at least partially overcome at least one of the disadvantages described above. In particular, it is an object of the invention to provide a more robust position sensor which preferably delivers better, more reliable and / or more robust measurement results. In this case, the availability of the position sensor for position detection can be extended, in particular statistically, wherein the position sensor preferably enables continuous position detection, advantageously even under (strong) external common-mode interference. It can therefore be an object to increase safety. It can also be an object to provide improved error detection and / or improved validation of position sensors and their sensor data.

[0007] The above object is achieved by a movable element having the features of the first independent patent claim, a position sensor having the features of the second independent patent claim, a method having the features of the third independent patent claim, a computer program product having the features of the fourth independent patent claim, a computer-readable data carrier having the features of the fifth independent patent claim, a control unit having the features of the sixth independent patent claim, and a vehicle having the features of the seventh independent patent claim. Further features and details of the invention emerge from the subclaims, the description, and the drawings.Features and details described in connection with the movable element according to the invention naturally also apply in connection with the position sensor according to the invention and / or in connection with the method according to the invention and / or in connection with the computer program product according to the invention and / or in connection with the computer-readable data carrier according to the invention and / or in connection with the control unit according to the invention and / or in connection with the vehicle according to the invention and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is or can always be made to each other. In particular, advantages described in the context of the first, second, third, fourth, fifth, sixth and / or seventh aspect also apply to the first, second, third, fourth, fifth, sixth and / or seventh aspect.The above object is achieved according to a first aspect by a movable element for a position sensor, in particular for a steer-by-wire system for a vehicle, comprising:.

[0008] - an inner ring comprising at least one wing for inductive position detection of the movable element,

[0009] - a measuring device based on another physical measuring principle for detecting the position of the movable element.

[0010] The movable element, the position sensor, the method, the computer program product, the computer-readable data carrier, the control unit and / or the vehicle can be specially designed for use in a steer-by-wire system, pedal (e.g. accelerator pedal, brake pedal, clutch), X-by-wire system, and / or break-by-wire system.

[0011] Particularly preferably, at least two, preferably different, physical measuring principles can be combined in one (preferably only in a single) movable element and / or sensor, in particular a position sensor. In particular, the measuring device can enable an (additional) other (in particular different) physical measuring principle than inductive position detection. This can at least partially reduce the above disadvantages. In particular, the influence of common-mode interference can be reduced and / or completely prevented. It can therefore be prevented that (in the worst case) position detection fails completely. This can enable position detection that is not only "fail-safe" (e.g.In the event of a power steering failure, only the assistance is switched off while the driver can still steer), but advantageously "fault-tolerant" and / or "fail-operational" (whereby, preferably, for example, in a steer-by-wire system, continued operation can be ensured even if at least one position detection mechanism fails). Preferably, if position detection by a physical measuring method fails, at least one further, preferably different, physical measuring method can continue to enable position detection.

[0012] It can preferably be provided that the inductive position detection and / or the measuring device for position detection are designed to be at least doubly redundant using a further physical measuring principle. It can therefore be provided that at least two measuring devices are provided. It can be provided that at least two wings and / or two induction detection elements are provided. The redundant components are preferably independent of one another and / or maximally (geometrically) spaced apart (e.g. along the circumference) so that the failure of one leads to a failure of the other with minimal probability. It can be provided, for example, that opposing wings are used and / or the induction detection elements are arranged opposite one another, in particular with respect to the movable element.

[0013] Particularly preferably, no (spatially) separated or separate (position) sensors for different physical measurement principles are necessary. Different physical measurement principles can be integrated into or implemented by a single movable element and / or sensor. One example could be a movable element (see below) that enables both inductive and optical detection. This also allows for a smaller installation space and / or lower weight.

[0014] The inner and / or outer ring can be substantially flat and / or planar. It can have an outer and / or inner round outer shape. In the simplest case, it can therefore be a disk, preferably with a central hole. It can be provided that the inner ring can be arranged centrally on a (central) axis of rotation in order to enable position detection, in particular of the (rotational) angle of the axis of rotation. For example, this can be a rotational axis of a steer-by-wire system, e.g. on the steering wheel (in particular the steering axis), in or on the transmission, on the engine and / or the lifting rod (in a vehicle). During operation, the ring can rotate, in particular with a rotational axis coupled to it. The movement orThe movement of the ring can be determined as part of a position detection system, preferably via the at least one wing, which is in particular firmly coupled to the inner and / or outer ring. The inner and / or outer ring can extend essentially in an xy plane (wherein in particular the x, y and z directions can form a right-hand system). The inner and / or outer ring can have a thickness (along the z direction) of between 0.01 and 100 mm, preferably between 0.1 and 10 mm, more preferably between 0.3 and 6 mm, particularly preferably between 0.5 and 4 mm, ideally between 1 and 2 mm. The movable element and / or the inner and / or outer ring can have a diameter, in particular perpendicular to the z-direction along an x-direction and / or y-direction, between 1 to 200 mm, preferably between 10 to 100 mm, more preferably between 20 to 80 mm, particularly preferably between 30 to 70 mm, ideally between 40 to 60 mm.

[0015] The inner and / or outer ring and / or the at least one wing can comprise a conductive material to advantageously enable a displacement of electrical charge for inductive position detection. In particular, eddy currents can be induced in the inner ring and / or the at least one wing, which can be detected sensorically by an inductive detection element. Preferably, the inner and / or outer ring and / or the at least one wing comprise a metal, for example sheet metal (easily formable), stainless steel (particularly durable) and / or copper (particularly highly conductive). The inner and / or outer ring and / or the at least one wing can form a coherent component and can preferably be manufactured from a, in particular coherent, stamped part. These can therefore preferably be stamped out of one material.Accordingly, the inner and / or outer ring and / or the at least one wing can form a stamped and / or stamped-bent part, which enables particularly cost-effective, simple, fast, and / or robust production. It can also be provided to provide openings and / or wing gaps. Particularly advantageously, this allows two or all different physical measurement principles to be implemented in one and / or by a movable element and / or a sensor.

[0016] The at least one wing, in particular all of the wings, can be arranged on the inner and / or outer ring, in particular bonded together. Accordingly, the wing can be arranged on the outermost circumferential edge of the inner ring and, in particular, represent a section-wise extension of the inner ring, in particular in the xy plane, with increasing distance from the center point / point of symmetry. The at least one wing, in particular due to its (geometric design), can enable inductive measurement, advantageously due to a periodic approach and / or spacing (through rotation) of the inner ring and / or the wing, in particular relative to a (complementary) induction detection element, which is preferably stationary, for example further (radially) outward and / or below or above (in a different plane). The wing can have the same thickness as the inner and / or outer ring.The wing can have a width, in particular perpendicular to the z-direction along an x-direction and / or y-direction, of between 0.1 and 200 mm, preferably between 0.5 and 50 mm, more preferably between 1 and 25 mm, particularly preferably between 3 and 20 mm, ideally between 5 and 15 mm. A greater width can deliver a stronger (induced) sensor signal. A smaller width can enable a smaller installation space and / or a reduced weight. The outer shape of the at least one wing (maximum distance from the center of the inner ring) can be circular. The inner ring, the outer ring, the at least one wing and / or all of the wings can be hollow or form a cavity in order to advantageously save weight and / or material.

[0017] In this case, an induction detection element can be provided which has a transmitting coil (30a in Figs. 5 and 6, dashed circle) and at least one receiving coil (30b in Figs. 5 and 6, diagonally hatched). The transmitting coil and / or the receiving coil can be manufactured in a planar manner, in particular in one layer and / or several layers of a printed circuit board (PCB). These preferably do not rotate with the other components shown and / or can be arranged separately, e.g., in a plane below or above, in particular in a printed circuit board. Preferably, the transmitting coil can emit a transmitting signal, e.g., a high-frequency electromagnetic wave, which induces an eddy current in at least one, preferably all, blades. The transmitting coil can be circular and / or spiral-shaped, in particular perpendicular to a rotation axis. The eddy current(s) can be correspondingly generated by the receiving coil (e.g.,inductively). In this way, a measurement signal can be measured which is dependent on the (angular) position of the vane(s). The (angular) position can be determined from the measurement signal. It can be provided that the outer ring has at least one slot. The slot can form a complete interruption in the material of the outer ring. As a result, eddy currents generated by the induction detection element, in particular a transmitting coil, cannot flow (at this point) in the outer ring, which in particular enables more precise measurement, since the eddy currents advantageously flow only or primarily in the vanes and not in the (otherwise continuous) outer ring. It can be provided that the slot only partially interrupts the width of the outer ring (in particular in the radial direction).As a result, corresponding eddy currents can be at least partially prevented, while at the same time the remaining part of the outer ring still enables good mechanical stability. As a result, the distance of the current path of the eddy currents can be at least further away from the induction detection element, in particular the receiving coil, which can in particular enable more precise measurement and thus determination of the (angular) position of the at least one wing. The at least one wing, the inner ring, the outer ring, and / or the at least one measuring device can rotate, in particular about a point of symmetry, which can, for example, be located substantially in the center of the arrangement and / or (centered) on the axis of rotation. In this case, a rotary attachment can be provided on a, in particular central, axis of rotation, for example along the circumference of the axis of rotation.In other words, it can be an internal rotor, in particular with an internal axle coupling. In this case, in particular during rotation, the induction detection element can preferably remain stationary, in particular therefore not rotate. In this way, an inductive measurement can be enabled by the rotation of the vanes, since the induction detection element does not rotate. It can also be provided that the outer ring, in particular at least in sections, preferably in the radially outward direction, has a rotary fastening, for example with a motor and / or a gear. In other words, it can be an external rotor, in particular with a hollow axle coupling. In this case, a bearing can be provided on the outside, for example. It can also be provided that the outer ring merely forms an extension of the at least one vane.In other words, the at least one slot can be designed so large that sections of the outer ring coincide with the at least one wing, and in particular, it thus appears as if there is no outer ring. In other words, a design that can be realized without an outer ring (and / or inner ring) is also conceivable. In other words, it can be provided that the inner ring and / or outer ring are very narrow or not provided (infinitely or infinitesimally narrow). For example, the outer ring can be omitted, and the at least one wing can be arranged only on the inner ring. It is also conceivable for the outer ring to have at least one slot or several slots, and for the material of the outer ring to be substantially radially flush with the at least one wing (so that in particular it appears as if there were no outer ring, see above).It is also conceivable for the inner ring to be omitted and for the at least one wing to be directly connected to a rotation axis (for example, welded on). The outer ring may or may not be provided in this case (see above). Preferably, the at least one wing, the inner ring, and / or the outer ring, can (nevertheless) enable measurement using at least two different measuring principles. The slot can have a width, in particular in the circumferential direction of the outer ring, of between 0.00001 and 100 mm, preferably between 0.0001 and 10 mm, preferably between 0.001 and 1 mm, preferably between 0.005 and 0.7 mm, particularly preferably between 0.01 and 0.3 mm, ideally between 0.05 and 0.15 mm. The number of slots preferably corresponds to the number of wings. The slots are particularly preferably arranged symmetrically, in particular centrally, between two wings.It may be provided to provide a greater thickness for the outer ring, the inner ring, and / or the at least one wing if at least one slot is provided. This can achieve sufficient and / or improved stability. It may also be provided that the outer ring is reinforced, in particular in sections, preferably near the at least one slot.

[0018] The measuring device can, in particular due to its (geometric design), enable position detection, advantageously due to a periodic approach and / or spacing (through rotation) of the inner ring, the outer ring, and / or the vane, in particular relative to a (complementary) counter-measuring device, which is preferably stationary. As a result, a corresponding additional sensor signal can be provided by the measuring device and / or the counter-measuring device, which is then provided, for example, to the control unit, for example via a data connection. The measuring device can be arranged in the inner ring, the outer ring, and / or the at least one vane.

[0019] The additional physical measuring principle of the measuring device can preferably differ from that of the inductive position detection. Therefore, the additional physical measuring principle can preferably not be inductive, or at least not primarily inductive (see below). This allows for particularly high robustness, since common-mode interference does not affect both and / or all physical measuring principles, or only very unlikely to affect them. Thus, functionality of the movable element and / or position sensor can always be ensured.

[0020] It can be provided that the additional physical measuring principle (or the measuring device) enables emergency operation and / or fallback operation, and is particularly designed for this purpose. This can advantageously be used to carry out inductive position detection during normal operation, and in the event of a fault, particularly if the inductive position detection becomes inaccurate and / or fails, to achieve position detection (only) using the measuring device. In this case, a reduced resolution (e.g. of the angular position) can also be used to advantageously reduce complexity, costs, installation space and / or weight. It can also be provided to use a reduced resolution, which becomes noticeable for the driver, for example, through reduced driving comfort and / or steering behavior, as information for the driver and / or a control unit.Accordingly, the failure and / or malfunction of the (primary) inductive position detection can be reported, for example to visit a workshop.

[0021] It may be provided, particularly in parallel (or simultaneously), to use inductive position detection and position detection by the measuring device. This can achieve plausibility and / or validation of the other physical measurement method. This can improve the accuracy, robustness, reliability, and / or speed of the position determination.

[0022] Within the scope of the invention, it can be advantageous for the movable element to have an inner and / or outer ring on which the at least one vane (12) is arranged, wherein in particular the outer ring surrounds the inner ring at least in sections, wherein the outer ring preferably has an insulator, in particular a plastic. In this case, it can be provided that the outer ring has at least one slot in order to advantageously prevent and / or reduce eddy currents in the outer ring, in particular with respect to the entire circumference. Preferably, a plurality of slots can be provided. In this case, the slots can preferably be distributed symmetrically, in particular with respect to the circumference. Preferably, a slot can lie substantially between two vanes, thus in particular in a vane gap.

[0023] Advantageously, a (parasitic) eddy current in the outer ring, in particular between adjacent blades, can be prevented. Advantageously, at least one slot (in particular all slots) can be at least partially filled with a plastic and / or reinforced in order to advantageously increase the mechanical stability, which can be reduced in particular by the use of a slot in the outer ring, which preferably comprises stainless steel. The at least one slot can interrupt the outer ring completely or at least partially. In the case of a complete interruption, eddy currents at this location can be completely prevented. In the case of a partial interruption, eddy currents at this location can be at least partially prevented, but at the same time the mechanical stability can be (comparatively) increased.

[0024] The outer ring can be circular and, in particular, can be arranged at least partially between the vanes in the vane gaps. As a result, the movable element can be circular, in particular in a plan view along the z-direction. In other words, the outer ring can close the holes created by the vane gaps to complete a circular shape. In this regard, the outer ring can be flush with the at least one vane. This can be advantageous for positioning the measuring device at least partially at the level of the vanes, in particular by simultaneously providing spatial, electrical and / or material separation. Alternatively or additionally, it can be provided that the outer ring expands the diameter of the movable element and, in particular, projects beyond the vanes.This can enable position determination by the measuring device at (even) more outwardly located positions of the movable element (relative to, for example, the center point and / or point of symmetry). This advantageously allows a more precise separation of the physical measuring principles. This can also enable (mechanical) protection of the inner ring. This can enable integrated production which optimizes the installation space and / or combines at least two different physical measuring principles. Preferably, no eddy current is induced in the at least one wing gap and / or the wing gaps. The outer ring can have an insulator, in particular a plastic, at least in sections. An insulator can prevent weakening (e.g. signal attenuation) of the inductive position detection.It can also be provided that this comprises materials with defined electrical properties, in particular a dielectric and / or permittivity, in order to improve the inductive position detection, for example by advantageously influencing (in particular amplifying) the electrical and / or magnetic fields. It can be provided that the outer ring is provided as a plastic back-injected component or is generated by a plastic injection molding process. The inner ring and / or the at least one wing can be back-injected and / or over-injected, in particular with plastic. Alternatively or additionally, it can be provided that conductive structures are arranged on the inner ring and / or at least one wing, for example by lamination, adhesive bonding and / or a force-fitting connection. This can achieve greater flexibility in design.It can be provided that the inner ring, the outer ring, and / or the at least one wing are integrated on a circuit board, with the at least one opening and / or the at least one reflector being realized directly on the circuit board. This advantageously allows for simple, precise, and / or cost-effective manufacturing.

[0025] Within the scope of the invention, it is conceivable that the measuring device has at least one optical path for optically detecting the position of the movable element, wherein preferably the at least one optical path is arranged at least partially in the inner ring, in the at least one wing and / or in the outer ring, wherein in particular the optical path has at least one opening and / or a reflector.

[0026] In this case, an optical path for optical position detection can in particular comprise a light path for a light barrier. Accordingly, the movable element and / or the position sensor can have at least one light barrier, for example a forked light barrier and / or a reflected light barrier. Optical position detection can in this case be achieved, for example, by the interaction of a light source (for example comprised on one side of a position sensor) and / or a light detector (for example comprised on a substantially opposite side of the position sensor). Light from a light detector can be measured and not measured alternately, in particular periodically, preferably depending on the (rotational) position and / or the angle of the movable element. This can be made possible by at least one opening and / or a reflector.Optical position detection can be used as an additional, different, and / or redundant physical measurement method. This can be particularly advantageous in improving the robustness of a moving element and / or position sensor, especially since there is little or no common-mode interference, which can affect both the optical and inductive measurement principles.

[0027] In this case, an opening can comprise a material recess (preferably continuous in terms of thickness). An opening can provide optical transparency, in particular for light. Accordingly, the optical path between the light source and the light sensor can be opened up through the opening, in particular periodically and / or upon rotation, so that the light sensor can receive the light emitted by a light source. If the opening is not at the same level as or on the connecting line between the light source and the light sensor, no light or only a greatly attenuated light can be detected by the light sensor. As a result, a corresponding additional sensor signal can be provided by the light sensor, which is then sent to the control unit, for example via a data connection. The light source can be on one side (e.g.The opening can be arranged on one side (e.g., top or bottom in the z-direction) of the movable element, and the light sensor on the other side (e.g., bottom or top in the z-direction). This can enable particularly robust and / or precise measurement. The opening can have a width (in particular along the direction of rotation and / or the azimuth, e.g., of the inner ring) of between 0.1 and 100 mm, preferably between 0.01 and 10 mm, preferably between 0.1 and 5 mm, more preferably between 0.5 and 4 mm, particularly preferably between 0.7 and 3 mm, ideally between 1 and 2 mm. The opening can have a height (in particular along the diameter and / or a radial coordinate, e.g. of the inner ring) between 0.00001 to 100 mm, preferably between 0.0001 to 10 mm, preferably between 0.001 to 1 mm, preferably between 0.005 to 0.7 mm, particularly preferably between 0.01 to 0.3 mm, ideally between 0.05 to 0.15 mm.As a result, the statistically frequently occurring dust particles with a size of approximately 1 mm cannot clog the opening, or at least only with difficulty. Accordingly, contamination can be prevented and / or reduced. It can be provided that a smaller opening enables a more precise measurement. It can be provided that a larger opening enables a less precise measurement, in particular resolution, which can advantageously provide a modified steering behavior (of a steer-by-wire system) for a driver, in particular to enable feedback (or an indication) of a malfunction, for example when the optical path is used in emergency operation. Preferably, the movable element and / or the position sensor has at least one light barrier, in particular a forked light barrier, in order to carry out optical position detection via at least one opening and / or the openings.Preferably, at least two forked light barriers are provided, which are spaced apart, in particular at a maximum distance, to ensure low susceptibility to errors. The wavelength range can be configured such that external light, e.g., sunlight and the like, has little or no influence on the measurement.

[0028] It can be provided to provide at least two openings, in particular at least 16 openings, preferably at least 32 openings, advantageously at least 64 openings, particularly preferably at least 128 openings, ideally at least 256 openings. A larger number can enable additional redundancy, which advantageously increases robustness, reduces susceptibility to errors and / or increases accuracy. A number of 256 openings can represent a particularly advantageous compromise between the aforementioned advantages and a complexity of the production and / or device. It can be provided to arrange the openings essentially next to one another, e.g. next to one another in the at least one wing, in order to enable a small installation space, in particular for the required light sources and / or light sensors. It can also be provided to maximize the distance between the openings, e.g.distributed across different wings and / or the outer ring to optimize robustness, optimize measurement accuracy, and / or reduce susceptibility to errors. Advantageously, the openings and / or reflectors are distributed such that at least one opening always generates an (optical) measurement signal, particularly in conjunction with a light sensor. This can be achieved, for example, by a calibrated (angular) offset between openings (or reflectors) and / or light sensors. The arrangement of the openings can thus also code the (optical) sensor signal, in particular allowing it to have a characteristic profile that can advantageously be used to verify functionality and / or for unambiguous identification (e.g., to prevent ambiguities).

[0029] In this case, a reflector can be designed to at least partially reflect light. Accordingly, the optical path between the light source and the light sensor can be opened by the reflector, in particular periodically and / or upon rotation, so that the light sensor can receive the light emitted by a light source. If the reflector is not at the level of the light source and / or light sensor, no light or only a greatly attenuated light can be detected by the light sensor. As a result, a corresponding additional sensor signal can be provided by the light sensor, which is then sent to the control unit, for example via a data connection. The light source and the light sensor can be arranged essentially in the same position, in particular adjacent to one another. In this case, an arrangement on one side (e.g.top or bottom in the z-direction) of the movable element may be sufficient, which can advantageously reduce the installation space. The reflector can have a width (in particular along the direction of rotation and / or the azimuth, e.g. of the inner ring) between 0.1 and 100 mm, preferably between 0.01 and 10 mm, preferably between 0.1 and 5 mm, more preferably between 0.5 and 4 mm, particularly preferably between 0.7 and 3 mm, ideally between 0.9 and 2.0 mm. The reflector can have a height (in particular along the diameter and / or a radial coordinate, e.g. of the inner ring) between 0.1 and 100 mm, preferably between 0.01 and 10 mm, preferably between 0.1 and 5 mm, more preferably between 0.5 and 4 mm, particularly preferably between 0.7 and 3 mm, ideally between 0.9 and 20 mm.As a result, the statistically frequently occurring dust particles with a size of approximately 0.1 mm advantageously do not cover the reflector, or at least not completely. This makes it possible to achieve a particularly high level of robustness. A larger extension can prevent and / or reduce contamination or its influence. It can be provided that a smaller reflector enables a more precise measurement. It can be provided that a smaller reflector enables a less precise measurement, in particular resolution, which can advantageously provide a modified steering behavior (of a steer-by-wire system) for a driver, in particular to enable feedback (or an indication) of a malfunction, for example when the optical path is used in emergency operation.Preferably, the movable element and / or the position sensor comprises at least one light barrier, in particular a reflex light barrier, for optical position detection via a reflector and / or the reflectors. Preferably, at least two reflex light barriers are provided, which are spaced apart from each other, in particular at a maximum distance, to ensure low susceptibility to errors.

[0030] It can be provided to provide at least two reflectors, in particular at least 16 reflectors, preferably at least 32 reflectors, advantageously at least 64 reflectors, particularly preferably at least 128 reflectors, ideally at least 256 reflectors. A larger number can enable additional redundancy, which advantageously increases robustness, reduces susceptibility to errors and / or increases accuracy. A number of 256 reflectors can represent a particularly advantageous compromise between the aforementioned advantages and the complexity of the manufacturing and / or device. It can be provided to arrange the reflectors essentially next to one another, e.g. next to one another in the at least one wing, in order to enable a small installation space, in particular for the required light sources and / or light sensors. It can also be provided to maximize the distance between the reflectors, e.g.distributed over the vanes and / or outer ring to optimize robustness, measurement accuracy and / or reduce susceptibility to errors.

[0031] It can be provided to provide at least one (preferably several as shown above) opening and at least one (preferably several as shown above) reflector. This can enable even greater robustness, redundancy and / or accuracy. It can therefore be provided that, particularly in emergency operation, greater accuracy is enabled by combining position detection via (several) openings and reflectors. It can be provided that the reflectors and openings are arranged essentially next to one another in order to enable a small installation space, in particular for the required light sources and / or light sensors. It can also be provided to maximize the distance between the reflectors and openings in order to optimize robustness, optimize measurement accuracy and / or reduce susceptibility to errors.

[0032] It can be provided that at least one (or two) openings and / or at least one (or two) reflectors are spatially spaced from one another. These can be spaced from one another relative to the diameter or radius of the movable element, with some being arranged at the outer edge, while others are arranged closer to the center. This allows them to be located on more inward and / or outward paths during rotation. This can reduce the probability of failure (of all elements). This can increase safety.

[0033] It can be provided that at least one opening and / or a reflector is provided in the at least one wing. This can facilitate simplified production, since the component only needs to be machined at the outermost end, for example, during punching. At the same time, a position detection system located further outward (relative to the diameter) can offer increased accuracy, particularly since a rotation angle can be transmitted over a greater distance.

[0034] Alternatively or additionally, at least one opening and / or one reflector may be provided in the at least one wing, and at least one reflector and / or one opening may be provided in the inner ring. This allows for spatial separation of the different physical measurement principles, which can optimize robustness and / or susceptibility to errors.

[0035] Alternatively or additionally, at least one opening and / or reflector may be provided in the at least one wing, and at least one reflector and / or opening may be provided in the outer ring. This allows for spatial separation of the different physical measurement principles, which can optimize robustness and / or susceptibility to errors. Additionally, the outer ring and the inner ring (and / or at least one wing) may be electrically insulated from each other.

[0036] This allows the robustness and / or susceptibility to errors to be (further) optimized.

[0037] The measuring device can further increase safety, especially the more different physical measuring principles are used. Inductive and optical position detection are particularly preferred, as these are particularly robust against common-mode interference ("common cause failure"), especially since common-mode interference that interferes with the inductive measuring principle is less likely to also interfere with the optical measuring principle, and vice versa.

[0038] In this case, the optical measuring principle can be provided via an optical link for emergency operation and / or fallback operation. Accordingly, in the event of at least a partial failure of the inductive measuring principle, the optical measuring principle can be used. This can be done with reduced resolution, particularly to ensure greater robustness and / or to provide information to the driver (see above).

[0039] It can be provided within the scope of the invention that the movable element, in particular the inner ring, has at least one wing gap which is arranged next to the at least one wing, wherein in particular the at least one wing and the at least one wing gap are arranged on an outwardly facing edge of the inner ring.

[0040] At least one wing gap can be filled by the outer ring.

[0041] Several wings and wing gaps can alternate, preferably evenly along the circumference. The wings and wing gaps can each cover the same angle, e.g., three wings and three wing gaps, each covering 60°, can be provided. This allows for particularly good symmetry, which can facilitate simple manufacturing and / or symmetrical rotation during operation.

[0042] The movable element can be provided with a number of vanes and / or vane gaps between 1 and 100, preferably between 1 and 50, preferably between 2 and 20, particularly preferably between 3 and 9, advantageously between 4 and 6, ideally 5. A larger number of vanes can increase measurement accuracy. A smaller number of vanes can optimize costs, robustness, and / or manufacturing.

[0043] It can preferably be provided to select the number of vanes and / or vane gaps depending on the rotational movement to be detected. For example, with a throttle valve, a maximum angle of 90° between two end positions can be measured. This can be made possible, for example, by a movable element with three vanes arranged 120° apart. This can sufficiently cover the 90° range of motion (by sensors). This can, in particular, prevent ambiguity in one or more detected and / or determined (angular) positions. A larger number of vanes can therefore increase the (angular) resolution and / or the (angular) coverage.

[0044] In this case, a vane can preferably have at least one opening to advantageously shape the induced electrical currents to generate a stronger and / or more characteristic measurement signal. This can enable a particularly advantageous combination of the two measurement principles.

[0045] In this case, an inductive sensor signal can be provided by the at least one wing and / or the induction detection element (in particular their interaction), which is provided, for example, to the control unit, for example via a data connection.

[0046] It is further conceivable for the movable element, the inner ring, the at least one wing, the at least one wing gap, and / or the outer ring to be designed symmetrically, in particular rotationally symmetrically, with the center point of the inner ring, in particular a rotational axis coupled thereto (oriented along the z-direction), preferably serving as the symmetry point / symmetry point axis. This can enable particularly advantageous, in particular smooth, rotational behavior, which can lead to particularly precise measurement. Alternatively or additionally, it can be provided that the movable element, the inner ring, the at least one wing, the at least one wing gap, and / or the outer ring are manufactured from a stamped part. This can result in particularly simple, robust, inexpensive, precise, and / or fast production. Furthermore, the movable element can be designed to be particularly robust.Preferably, at least two, preferably all, physical measurement principles can be enabled (at least partially) by a single movable element made from a stamped part. For example, the at least one wing, together with at least one opening located therein, can enable both an inductive measurement and an optical measurement. It is also conceivable for the at least one wing to be configured at an angle to the inner ring, wherein, in particular, the at least one wing is arranged substantially perpendicular to the inner ring.

[0047] In this case, the at least one wing can point substantially along the axis of rotation (in particular along the z-direction), whereby the installation space can advantageously be reduced and / or optimized. This can also provide a more advantageous arrangement of the induction detection element and / or counter-measuring device, which can thereby be arranged further apart and / or at an angle to one another. As a result, it can be provided that connecting cables for data connections are bundled and / or attached in a space-saving manner. Preferably, all of the wings can be angled substantially identically. This allows for simpler production and / or improved, in particular more uniform, rotation behavior. The installation space can be reduced by arranging a corresponding induction detection element closer to a center point and / or point of symmetry or axis of symmetry. The installation space in the xy plane can thus be reduced.This allows for a design that is better suited to the available installation space. The measuring device can be arranged in at least one wing.

[0048] Within the scope of the invention, it is optionally possible for the movable element to have at least two wings for inductive position detection of the movable element, in particular to enable redundant inductive position detection.

[0049] Inductive position detection functionality can be enabled even if one or all but one of the vanes no longer generate an (inductive) measurement signal. Furthermore, the induced measurement signal, particularly signal strength (such as voltage level) and / or signal profile, can be influenced by the number, orientation, position, spacing, thickness, shape, and / or material, and should preferably be considered in advance (during development). This also ensures the unambiguity of the measurement signal, preferably avoiding ambiguities in the detection and / or determination of the (angular) position.

[0050] In this case, it can be provided that the movable element and / or the position sensor has at least two induction detection elements. It can also be provided that the number of vanes and the number of induction detection elements are identical, whereby each vane advantageously generates a sensor signal, in particular a measurable and / or analyzable one, when approaching and / or moving away from an induction detection element. This can achieve additional redundancy. It can enable greater robustness and / or lower susceptibility to errors.

[0051] Furthermore, it can be provided within the scope of the invention that the measuring device is designed to be at least doubly redundant based on a further physical measuring principle for detecting the position of the movable element.

[0052] This can be achieved, for example (as described above) by combining the optical and inductive measuring principles. This can also be achieved through other combinations (see below).

[0053] With regard to the present invention, it is conceivable that the measuring device enables magnetic and / or capacitive position detection of the movable element.

[0054] Accordingly, one or more additional physical measurement principles can enable magnetic and / or capacitive position detection. This can further increase safety, especially the more different physical measurement principles are used.

[0055] The inner ring, the outer ring and / or at least one wing can comprise a magnetic material at least in sections. The position sensor can comprise at least one magnetic sensor element which detects an approach and / or a removal of the magnetic material. The magnetic material can comprise holes which are detected by the magnetic sensor element. Particularly preferably, the at least one opening can be used to provide both an optical path and a hole. This can result in a particularly advantageous combination of the different measuring principles. The magnetic sensor element, in interaction with the holes, can detect a (periodically) changing magnetic resistance; in particular, the resulting differences in the magnetic flux can be detected electrically.In this case, a corresponding additional (magnetic) sensor signal can be generated, which can be transmitted, for example, to a control unit via data transmission. The additional sensor signal can comprise a voltage and / or current signal, which can be more robust, in particular against common-mode interference that affects the inductive measuring principle. Alternatively or additionally, it can also be provided that the at least one magnetic sensor element detects at least one opening in the movable element. This allows a particularly space-saving combination, in particular between optical and magnetic position detection. It can also be provided that, depending on the application, either optical or magnetic position detection can be carried out with an (identical) movable element. Accordingly, the same movable elements can be used universally.It may be provided that the magnetic sensor element for sensing a movable element, in particular a rotating one, is integrated into a circuit board. It may be provided that this element comprises a magnet that is, for example, overmolded with corresponding electronic connections and / or is at least manufactured as a single unit.

[0056] The inner ring, the outer ring, and / or at least one wing can comprise, at least in sections, a capacitor, a capacitor plate, and / or a dielectric. The position sensor can comprise at least one capacitive sensor element, for example, a plate capacitor whose plates are preferably arranged above and below (in the z-direction) the movable element, which detects an approach and / or removal of the capacitor, the capacitor plate, and / or the dielectric. A corresponding additional sensor signal can be generated, which can be transmitted, for example, to a control unit via data transmission.

[0057] The above object is further achieved according to a second aspect by a position sensor according to the invention for position detection, in particular for a steer-by-wire system for a vehicle, comprising:

[0058] - a movable element according to one of the preceding claims,

[0059] - an induction detection element for inductively detecting a movement of the movable element,

[0060] - a counter measuring device for further detecting a movement of the movable element, in interaction with a measuring device based on a further physical measuring principle for detecting the position of the movable element.

[0061] The position sensor can have at least one brush, which is preferably designed to remove dirt from the movable element. This can increase robustness and / or reduce susceptibility to errors. The at least one brush can preferably be stationary, while the movable element moves, in particular rotates, relative to the brush. The at least one brush can clean the movable element from below and / or above (e.g., relative to the z-direction). Dust particles on the order of 0.1 mm can thus preferably be removed. Contamination of the wings, opening, and / or reflector can therefore be prevented. Furthermore, adhesion of dirt, which, in particular over a longer period of time, impairs inductive and / or optical position detection, for example due to oxidizing agents, which are preferably removed by the brush, can advantageously be prevented.The brush is preferably arranged in such a way that it cannot come into contact with the at least one reflector when the movable element rotates. This allows the reflective property of the reflector to be retained. The position sensor can be at least partially integrated onto a circuit board. For example, the at least one reflector can be arranged on the circuit board and, in particular, generate a further (optical) sensor signal together with at least one opening in the movable element. The light source and / or the light sensor can preferably be integrated onto the circuit board. The position sensor can have a housing which preferably includes a window through which an optical path can preferably be realized. This allows encapsulation which can nevertheless be translucent.The light source and / or the light sensor can be arranged on the back of the circuit board, and the light can be guided, for example, through a hole or milled section of the circuit board. This allows the installation space to be minimized and / or designed specifically.

[0062] This results in the same advantages with regard to a position sensor according to the invention as have already been described with regard to a movable element according to the invention.

[0063] The above object is further achieved according to a third aspect by a method according to the invention for a position sensor for detecting the position of a movable element of the position sensor, in particular for a steer-by-wire system for a vehicle, comprising:

[0064] - Providing a position sensor according to the second aspect comprising a movable element according to the first aspect,

[0065] - Moving, in particular by operating a steer-by-wire system, the movable element, in particular by coupling the movable element to a rotational axis of a steer-by-wire system,

[0066] - inductive detection of the movement of the movable element by the position sensor to provide an inductive sensor signal,

[0067] - further detecting the movement of the movable element by the position sensor, in particular a measuring device, to provide a further sensor signal based on a further physical measuring principle for detecting the position of the movable element,

[0068] - Providing the inductive sensor signal and the further sensor signal to a control unit, preferably via a (respective) data connection,

[0069] - Processing of the inductive sensor signal and the further sensor signal by the control unit to provide an output signal,

[0070] - Providing the output signal by the control unit, for example to operate a steer-by-wire system.

[0071] The output signal can include a position, in particular an angular position, a rotational position, and / or a rotational speed. For example, the control unit can adjust a steering angle of the wheels of a vehicle depending on the output signal via the steer-by-wire system. Alternatively or additionally, the control unit can adjust a steering angle of a control console, for example, a steering wheel, of a vehicle depending on the output signal via the steer-by-wire system.

[0072] This results in the same advantages with regard to a method according to the invention as have already been described with regard to a movable element according to the invention and / or a position sensor according to the invention.

[0073] The above object is further achieved according to a fourth aspect by a computer program product according to the invention, comprising instructions which, when the computer program product is executed by a computer, cause the computer to implement the method according to the third aspect.

[0074] Thus, with respect to a computer program product according to the invention, the same advantages arise as have already been described with respect to a movable element according to the invention and / or a position sensor according to the invention and / or a method according to the invention. The above object is further achieved according to a fifth aspect by a computer-readable data carrier according to the invention, in which instructions are stored which, when executed by a computer, cause the computer to carry out the method according to the third aspect.

[0075] This results in the same advantages with regard to a computer-readable data carrier according to the invention as have already been described with regard to a movable element according to the invention and / or a position sensor according to the invention and / or a method according to the invention and / or a computer program product according to the invention.

[0076] The above object is further achieved according to a sixth aspect by a control unit according to the invention, comprising a computing unit and a memory unit in which instructions are stored which, when at least partially executed by the computing unit, carry out a method according to the third aspect.

[0077] For example, the control unit can also control and / or regulate a drive device of a vehicle's steer-by-wire system, particularly depending on the sensor signal. Provision can also be made for the sensor signal to be provided to other control units of the vehicle to enable further processing.

[0078] The control unit can comprise an integrated circuit (e.g., ASIC) and / or be connected to it for data communication. It can be provided that the sensor signals, in particular optical sensor signals, are transmitted directly to and / or processed by the integrated circuit for optimized, in particular faster and / or real-time calculation.

[0079] The control unit can be configured to perform position detection and / or evaluation depending on (all) incoming sensor signals. In particular, a decision can be made as to which sensor signals are correct and which are faulty. Thus, for example, each physical measuring principle can be implemented with at least two channels of redundancy. A redundancy architecture can be referred to as "2+2". This allows a "2-out-of-3" decision to be made if a sensor signal provides incorrect and / or erroneous information, e.g., a position (angular position). In the event of common-mode interference, a 2+2 safety architecture can result in two differing inductive sensor signals and two undisturbed optical position sensors without synchronization errors. A system decision between incorrect and correct can be made easily in such a case.Even in the example of a common-mode interference on the optical position sensors and no influence on the inductive position sensors, a clear wrong-to-right decision can be made.

[0080] This results in the same advantages with regard to a control unit according to the invention as have already been described with regard to a movable element according to the invention and / or a position sensor according to the invention and / or a method according to the invention and / or a computer program product according to the invention and / or a computer-readable data carrier according to the invention.

[0081] The above object is further achieved according to a seventh aspect by a vehicle according to the invention comprising a control unit according to the sixth aspect and / or a position sensor according to the second aspect and / or a movable element according to the first aspect.

[0082] This results in the same advantages with regard to a vehicle according to the invention as have already been described with regard to a movable element according to the invention and / or a position sensor according to the invention and / or a method according to the invention and / or a computer program product according to the invention and / or a computer-readable data carrier according to the invention and / or a control unit according to the invention. Further advantages, features and details of the invention emerge from the following description, in which several exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. In each case, schematically

[0083] Figure 1 shows a movable element with adjacent measuring devices,

[0084] Figure 2 a movable element with opposing measuring devices,

[0085] Figure 3 a movable element openings and reflectors,

[0086] Figure 4 a movable element induction detection element and counter measuring device,

[0087] Figure 5 a moving element (inner rotor)

[0088] Figure 6 a moving element (external rotor)

[0089] Figure 7 shows a vehicle comprising a position sensor, and

[0090] Figure 8 shows a method for a position sensor.

[0091] In the following figures, identical reference numerals are used for the same technical features, even for different embodiments.

[0092] Fig. 1 shows an example of a movable element 10 for a position sensor 100, in particular for a steer-by-wire system 201 for a vehicle 200, comprising:

[0093] - an inner ring 11 comprising at least one wing 12 for inductive position detection of the movable element 10,

[0094] - a measuring device 20 based on a further physical measuring principle for detecting the position of the movable element 10.

[0095] The movable element 10 can be circular, particularly due to the shape of the outer ring 14. In addition to a wing 12, particularly between two wings 12, wing gaps 13 can be arranged. The measuring device 20 can have an optical path 21, which in particular comprises an opening 22, which in particular forms a light-permeable recess in the movable element 10, and / or a reflector 23, which in particular is designed to reflect light.

[0096] Fig. 2 shows an example of a movable element 10 based on Fig. 1. However, the positions of the (two) measuring devices 20 are changed. A first measuring device 20 can be arranged at one end of the movable element 10, while a second measuring device 20 can be arranged at a substantially opposite end of the movable element 10. The diameter of the outer ring 14 is changed so that it is arranged substantially flush with the vanes 12. Alternatively or additionally, the measuring device 20 can also be arranged in the outer ring 14. This allows a separation, in particular electrical separation, between the inner ring 11 or the vanes 12 and the outer ring 14, and thus in particular of the measuring device 20.

[0097] Fig. 3 shows a movable element 10 based on Fig. 1 or Fig. 2. (Two) opposing openings 22 are shown. (Two) opposing reflectors 23 are shown. The openings 22 and reflectors 23 can be arranged alternately, for example at a 90° distance. This allows the distance to be maximized in order to advantageously achieve particularly high robustness. Furthermore, this can improve the measurement accuracy. It is also indicated that the inner ring 11 can be circular, and in particular the at least one wing 12 or the wings 12 are arranged on its outer edge, for example in a material fit. Thus, the inner ring 11 and the wings 12 can form a stamped part, for example made of metal.

[0098] Fig. 4 shows a movable element 10 based on Fig. 1, Fig. 2, or Fig. 3. Also shown is a position sensor 100 which comprises the movable element 10. The position sensor 100 can have at least one induction detection element 30. By way of example, two induction detection elements 30 are shown which are opposite one another with respect to the movable element 10. The induction detection element 30 can have an inductive encoder. This allows the distance between them to be maximized, which advantageously enables greater robustness and / or more precise measurement. The position sensor 100 can have at least one counter measuring device 40. By way of example, two counter measuring devices 40 are shown which are opposite one another with respect to the movable element 10. This allows the distance between them to be maximized, which advantageously enables greater robustness and / or more precise measurement.Accordingly, the induction detection element 30 and / or the counter-measuring device 40 can each be designed with dual redundancy. Advantageously, at least two different physical measuring principles (e.g., inductive and optical) can be used to enable the position detection of the movable element 10, and thus in particular of a rotational axis coupled centrally to the movable element 10, e.g., of a steer-by-wire system 201. This can ensure particularly high robustness, emergency operation, and / or improved safety. As described above, it can also be provided that the at least one wing 12 is angled, for example, by being angled upwards by 90° (and in particular protruding from the plane of the drawing).

[0099] Fig. 5 shows, by way of example, a movable element 10 for a position sensor 100, in particular for a steer-by-wire system 201 for a vehicle 200, comprising an inner ring 11 comprising three vanes 12 for inductive position detection of the movable element 10. The three vanes 12 are arranged on the inner ring 11 and on the outer ring 14; in particular, they together form a stamped part. The movable element 10 can be circular in shape, in particular due to the shape of the outer ring 14. A vane gap 13 can be arranged next to each vane 12, in particular between two vanes 12. The outer ring 14 comprises a plurality of measuring devices 20.The measuring device 20 can have an optical path 21, which in particular comprises an opening 22, which in particular forms a light-permeable recess in the movable element 10, and / or a reflector 23, which is in particular designed to reflect light. In the present case, these are arranged essentially equidistantly along the outer ring 14. In addition to an optical measuring principle, an inductive measuring principle can be implemented. An induction detection element 30 can be provided, which has a transmitting coil 30a (dashed circle) and at least one receiving coil 30b (diagonally hatched). These preferably do not rotate with the other components shown and / or can be arranged separately, in particular planar, e.g., in a plane below or above, in particular in a printed circuit board (PCB). The transmitting coil 30a can preferably emit a transmitting signal, e.g.,a high-frequency electromagnetic wave, which induces an eddy current in at least one, preferably all, vanes 12. The eddy current(s) can be detected accordingly by the receiving coil 30b. Thus, a measurement signal can be measured which is dependent on the (angular) position of the vane(s) 12. The (angular) position can be determined from the measurement signal. It can be provided that the outer ring 14 has at least one slot 50. The slot can form a complete interruption in the material of the outer ring 14. As a result, eddy currents generated by the induction detection element 30, in particular a transmitting coil 30a, cannot flow (at this point) in the outer ring 14, which in particular enables a more precise measurement. It can be provided that the slot 50 only partially interrupts the width of the outer ring (in particular in the radial direction).As a result, corresponding eddy currents can be at least partially suppressed, while at the same time the remaining part of the outer ring still enables good mechanical stability. As a result, as shown by the arrows, the distance of the current path of the eddy currents can be at least further away from the induction detection element 30, in particular the receiving coil 30b, which can in particular enable a more precise measurement and thus determination of the (angular) position of the at least one vane 12. The at least one vane 12, the inner ring 11, the outer ring 14, and / or the at least one measuring device 20 can rotate, in particular about a point of symmetry in the middle. A rotary attachment 60 can be present on a, in particular central, axis of rotation, for example along the circumference of the axis of rotation. In other words, it can be an internal rotor, in particular with internal axis coupling.In this case, the induction detection element 30 can preferably remain stationary, in particular not rotate.

[0100] Fig. 6, similar to Fig. 5, also shows an example of a movable element 10 for a position sensor 100. However, (by way of example) no inner ring 11 is provided; in particular, its width can be infinitesimally small. The vanes 12 can therefore be connected to the outer ring 14. The outer ring 14 can have a rotary fastening 60, for example with a motor and / or a gear, in particular at least in sections, preferably in the radially outward direction. In other words, it can be an external rotor, in particular with a hollow axle coupling. In this case, a bearing can be provided on the outside, for example. In Fig. 5 and / or Fig. 6 it can also be provided that the outer ring 14 merely forms an extension of the at least one vane 12.In other words, the slot 50 can be designed so large that sections of the outer ring 14 coincide with the at least one wing 12, and in particular it thus appears as if there is no outer ring 14. In other words, a design is also conceivable which can be realized without an outer ring 14 (and / or inner ring 11).

[0101] Fig. 7 shows a vehicle 200 comprising a steer-by-wire system 201. Furthermore, the vehicle 200 comprises a control unit ECU comprising a computing unit CU and a memory unit MU. The vehicle 200 may further comprise a position sensor 100 comprising a movable element 10. The position sensor 100 may be integrated in or with the steer-by-wire system 201. Preferably, the position sensor 100 may detect an (angular) position of at least one rotational axis of the steer-by-wire system 201. Based thereon, the control unit ECU may control and / or regulate the vehicle 200. Fig. 8 shows a method for a position sensor 100 for detecting the position of a movable element 10 of the position sensor 100, in particular for a steer-by-wire system 201 for a vehicle 200, comprising:

[0102] - Providing 110 a position sensor 100, for example according to Fig. 4 comprising a movable element 10, for example according to Figs. 1 to 3,

[0103] - moving 120, in particular by operating a steer-by-wire system 201, the movable element 10,

[0104] - inductive detection 130 of the movement 120 of the movable element 10 by the position sensor 100 to provide an inductive sensor signal 131,

[0105] - further detection 140 of the movement 120 of the movable element 10 by the position sensor 100 in order to provide a further sensor signal 141 based on a further physical measuring principle for detecting the position of the movable element 10,

[0106] - Providing 150 the inductive sensor signal 131 and the further sensor signal 141 to a control unit ECU,

[0107] - Processing 160 of the inductive sensor signal 131 and the further sensor signal 141 by the control unit ECU to provide an output signal,

[0108] - Providing 170 the output signal by the control unit ECU, for example for operating a steer-by-wire system 201.

[0109] List of reference symbols

[0110] 10 movable element

[0111] 11 inner ring

[0112] 12 wings

[0113] 13 wing gap

[0114] 14 outer ring

[0115] 20 measuring device

[0116] 21 optical path

[0117] 22 Opening

[0118] 23 Reflector

[0119] 30 Induction detection element

[0120] 30a transmitting coil

[0121] 30b Receiving coil

[0122] 40 Counter measuring device

[0123] 50 slot

[0124] 60 swivel mounting

[0125] 100 Position sensor

[0126] 110 Providing a position sensor

[0127] 120 Moving the movable element

[0128] 130 inductive detection

[0129] 131 inductive sensor signal

[0130] 140 further recording

[0131] 141 additional sensor signal

[0132] 150 Providing the inductive sensor signal

[0133] 160 Processing the inductive sensor signal and the further sensor signal

[0134] 170 Providing the output signal

[0135] 200 vehicles

[0136] 201 Steer-by-Wire System

[0137] CU computing unit

[0138] ECU control unit

[0139] MU storage unit

Claims

Patent claims 1 . Movable element (10) for a position sensor (100), in particular for a steer-by-wire system (201) for a vehicle (200), comprising: - at least one wing (12) for inductive position detection of the movable element (10), - a measuring device (20) based on a further physical measuring principle for detecting the position of the movable element (10).

2. Movable element (10) according to claim 1, characterized in that the movable element (10) has an inner ring (11) and / or outer ring (14) on which the at least one wing (12) is arranged, wherein in particular the outer ring (14) surrounds the inner ring (11) at least in sections.

3. Movable element (10) according to claim 1 or 2, characterized in that the measuring device (20) has at least one optical path (21) for optically detecting the position of the movable element (10), wherein preferably the at least one optical path (21) is arranged at least partially in the inner ring (11), in the at least one wing (12) and / or in the outer ring (14), wherein in particular the optical path (21) has at least one opening (22) and / or a reflector (23).

4. Movable element (10) according to one of the preceding claims, characterized in that the movable element (10) has at least one wing gap (13) which is arranged next to the at least one wing (12), wherein in particular the at least one wing (12) and the at least one wing gap (13) are arranged on an outwardly facing edge of the inner ring (11).

5. Movable element (10) according to one of the preceding claims, characterized in that the movable element (10), the inner ring (11), the at least one wing (12), the at least one wing gap (13) and / or the outer ring (14) are designed symmetrically, in particular rotationally symmetrically, and / or are made from a stamped part.

6. Movable element (10) according to one of the preceding claims, characterized in that the at least one wing (12) is designed to be angled to the inner ring (11), wherein in particular the at least one wing (12) is arranged substantially perpendicular to the inner ring (11).

7. Movable element (10) according to one of the preceding claims, characterized in that the movable element (10) has at least two wings (12) for inductive position detection of the movable element (10), in particular to enable redundant inductive position detection.

8. Movable element (10) according to one of the preceding claims, characterized in that the measuring device (20) is designed to be at least doubly redundant based on a further physical measuring principle for detecting the position of the movable element (10).

9. Movable element (10) according to one of the preceding claims, characterized in that the measuring device (20) enables magnetic and / or capacitive position detection of the movable element (10).

10. Position sensor (100) for position detection, in particular for a steer-by-wire system (201) for a vehicle (200), comprising: - a movable element (10) according to one of the preceding claims, - an induction detection element (30) for inductively detecting (130) a movement (120) of the movable element (10), - a counter-measuring device (40) for further detecting (140) a movement (120) of the movable element (10), in interaction with a measuring device (20) based on a further physical measuring principle for detecting the position of the movable element (10).

11. Method for a position sensor (100) for detecting the position of a movable element (10) of the position sensor (100), in particular for a steer-by-wire system (201) for a vehicle (200), comprising: - Providing (110) a position sensor (100) according to claim 10 comprising a movable element (10) according to one of claims 1 to 9, - moving (120), in particular by operating a steer-by-wire system (201), the movable element (10), - inductive detection (130) of the movement (120) of the movable element (10) by the position sensor (100) to provide an inductive sensor signal (131), - further detecting (140) the movement (120) of the movable element (10) by the position sensor (100) by a further sensor signal (141) based on a further physical measuring principle for detecting the position of the movable element (10) to provide, - Providing (150) the inductive sensor signal (131) and the further sensor signal (141) to a control unit (ECU), - processing (160) of the inductive sensor signal (131) and the further sensor signal (141) by the control unit (ECU) to provide an output signal, - Providing (170) the output signal by the control unit (ECU), for example for operating a steer-by-wire system (201).

12. A computer program product comprising instructions which, when executed by a computer, cause the computer to implement the method according to the preceding claim.

13. A computer-readable data carrier in which instructions are stored which, when executed by a computer, cause the computer to carry out the method according to claim 11.

14. Control unit (ECU), comprising a computing unit (CU) and a memory unit (MU) in which instructions are stored which, when at least partially executed by the computing unit (CU), carry out the method according to claim 11.

15. Vehicle (200) comprising a control unit (ECU) according to the preceding claim and / or a position sensor (100) according to claim 10 and / or a movable element (10) according to one of the preceding claims 1 to 9.

Images