Detection system for determining the pivot position of a wing element of a motor vehicle, motor vehicle, and method for determining the pivot position of a wing element, as well as method for pivoting a wing element.

Abstract

The invention relates to a detection system (15) for determining a pivot position (16) of a wing element (5) of a motor vehicle (1) wherein the detection system (15) comprises a radar device (17) to be arranged in the motor vehicle (1) and a radar reflector (18) to be arranged on the wing element (5), which can be detected by radar by means of the radar device (17) to determine the pivot position (16) of the wing element (5).

Description

The invention relates to a detection system for determining a pivot position of a wing element of a motor vehicle according to the preamble of claim 1. The invention further relates to a motor vehicle according to the preamble of claim 5. The invention further relates to a method for determining a pivot position of a wing element, which is held on a body component such that it can be pivoted about a pivot axis, according to the preamble of claim 7, and to a method for pivoting a wing element, which is held on a body component such that it can be pivoted about a pivot axis, according to claim 8.EP 3 299 561 B1 discloses an adjusting device for a vehicle part which can be moved relative to a body of a vehicle, in particular a vehicle door or a front flap, comprising a drive arrangement having a drive unit and at least one movement state sensor for detecting a movement state of the drive unit and for outputting corresponding movement state signals.In addition, DE 10 2023 116 426 A1 discloses a body component for a motor vehicle, wherein the body component is actuatable by a vehicle-side actuating device for automatically changing an arrangement of the body component, and wherein the body component has a retroreflector for reflecting a measurement signal emitted by a measuring device of the motor vehicle to the measuring device.Furthermore, DE 10 2019 108 927 A1 discloses an electronic locking system for a closure element of a motor vehicle, having at least one contactless object detection (NCOD) sensor (20) which is fastened to the closure element, a controller which is designed to selectively activate the at least one NCOD sensor as a function of the detection of the position of the closure element.Furthermore, DE 200 00 576 U1 discloses a device for determining the open position of a door, engine hood, a trunk lid or the like of a motor vehicle, for emitting an electronic signal to a monitoring or control device, wherein the device comprises a transmitter and a receiver, and the open position is determined by time of flight determination of a pulse emitted by the transmitter, reflected on the frame of the door, the body, the engine hood or the like and received by the receiver.It is the object of the invention to provide a detection system for determining a pivot position of a wing element of a motor vehicle, a motor vehicle, a method for determining the pivot position and a method for pivoting the wing element, so that the pivot position of the wing element can be determined particularly precisely.This object is achieved according to the invention by a detection system for determining a pivot position of a wing element of a motor vehicle having the features of patent claim 1, by a motor vehicle having the features of patent claim 5, by a method for determining a pivot position of a wing element of a motor vehicle held on a body component so as to be pivotable about a pivot axis and having the features of patent claim 7, and by a method for pivoting a wing element of a motor vehicle held on a body component so as to be pivotable about a pivot axis and having the features of patent claim 8. Advantageous embodiments of the invention are the subject matter of the dependent claims and the description.A first aspect of the invention relates to a detection system for determining a, in particular current, pivot position of a wing element of a motor vehicle. The motor vehicle is designed, for example, as a motor vehicle, in particular as a passenger car or as a commercial motor vehicle. The motor vehicle preferably has the detection system, in particular in its completely manufactured state.The wing element is pivotable, for example, between at least two pivot positions about the pivot axis, in particular relative to a body component. The body component is understood in the present case as a structural element of an, in particular self-supporting, body of the motor vehicle. Thus, the wing element is held or fastened, for example, in particular via a fastening device, in particular between the pivot positions, relative to the body component, for example, at least indirectly or directly, on the body component. In other words, the wing element can be displaced between the pivot positions. For example, a first of the pivot positions is an open position and a second of the pivot positions is a closed position. The fastening device can be part of the wing element.The wing element is preferably an automatically pivotable wing element, which can also simply be referred to as an automatic wing element. This means that the motor vehicle has, for example, at least one actuator, in particular an electric machine, by means of which the pivoting of the wing element can be effected or is effected. In other words, the actuator is designed to drive the wing element.In order to be able to determine a particularly precise, in particular current, pivot position of the wing element, it is provided according to the invention that the detection system has at least one radar device to be arranged or arranged in the motor vehicle and a radar reflector to be arranged or arranged in particular directly on the wing element. In other words, the radar device has a holding device, by means of which the radar device is to be held or held on a structural element of the motor vehicle, which structural element is formed in particular separately from the wing element of the motor vehicle, and the radar reflector has at least one fastening region, by means of which the radar reflector is to be held or held, for example directly, on a wing element part of the wing element. This means that the radar device is configured for arranging in the motor vehicle and the radar reflector is configured for arranging, in particular fastening, on the wing element. The fact that the radar device is to be arranged or arranged in the motor vehicle can be understood in particular to mean that the radar device is to be arranged or arranged on the component of the motor vehicle. By arranging or arranging the radar reflector on the wing element can be understood in particular that the radar reflector is arranged or arranged on the wing element part of the wing element. The radar reflector can be detected for determining, in particular calculating, the, in particular current, pivot position of the wing element by means of the radar device or by the radar device by means of radar, that is to say by means of radar technology. This means that the radar reflector, in particular a position of the radar reflector, can be detected or is detected by means of the radar device in order to determine the pivot position of the wing element.In other words, by means of the radar device, by detecting the radar reflector by means of radar or radar technology, the, in particular current, pivot position of the wing element can be detected or determined. The radar device is thus configured to detect the radar reflector, whereby the pivot position of the wing element can be determined by means of the radar device, in particular depending on the detected radar reflector. The detection can be understood to mean detection. The radar reflector is preferably formed separately from the wing element part, in particular the wing element.Radar is the abbreviation for Radio Detection and Ranging. In the present case, the term "radar" or "radar technology" can be understood to mean a detection and / or positioning method based on electromagnetic waves in the radio frequency range. The electromagnetic waves may also be referred to as radio waves. Thus, the radar device can be understood to mean, in particular, a radar device. The radar device is in particular a device which emits a so-called primary signal as bundled electromagnetic waves, which receives echoes reflected by objects as a secondary signal and can evaluate them according to various criteria. Information about the objects can thus be obtained. This information is in particular a localization. The radar device thus has, in particular, at least one transmitting device which is designed to transmit the electromagnetic waves. The transmission device can also be referred to as a transmitter. Furthermore, the radar device has at least one receiving device which is designed to receive electromagnetic waves, in particular to receive the electromagnetic waves transmitted by means of the transmitting device and reflected, that is to say returned, at the radar reflector. Furthermore, the radar device has, for example, at least one electronic computing device, by means of which the radar reflector, that is to say in particular a position of the radar reflector in space and / or relative to the radar device, can be detected or is detected as a function of the electromagnetic waves received by the receiving device, that is to say in particular as a function of the electromagnetic waves reflected and received by the radar reflector. Furthermore, the pivot position, in particular the current pivot position, of the wing element can be determined by means of the electronic computing device as a function of the detected radar reflector or its detected position. The pivot position of the wing element to be determined or determined can be the first pivot position, the second pivot position or an intermediate pivot position. The intermediate pivot position can also be referred to as a further pivot position.The radar reflector can be understood in particular as a retroreflector for radar applications. The radar reflector can also be referred to as a "corner reflector" or as a corner element. In particular, the radar reflector is designed to generate a particularly strong echo signal and thus a reliable target sign (target) for the wing element for radar devices, that is to say for the radar device, since the wing element otherwise has only a very small or unstable effective reflection surface, for example. The radar reflector thus has an effective reflection surface which is designed for targeted detection by means of radar, that is to say in particular for targeted reflection of the electromagnetic waves emitted by the radar device. The radar reflector can be constructed according to quasi-optical principles and use, for example, specular reflection (reflection on smooth surfaces) and / or refraction and / or diffraction to generate the effective reflection surface or are based thereon. Preferably, the radar reflector protrudes from the door part. Preferably, the reflection at that region of the wing element at which the radar reflector is arranged is greater than if the radar reflector were not arranged on the wing element, that is to say the wing element or the wing element part were free of the radar reflector.The invention is based in particular on the following findings and considerations: Accurate identification and position recognition of driven wing elements, in particular body parts such as doors, flaps or the like, can be particularly important for different customer functions, but also, inter alia, for safety functions such as force limitation. A conventional, in particular driven, vane element or its drive unit can usually be equipped with Hall sensors, which can determine the position and speed of the vane element by counting Hall flanks and conversion. In this case, when the wing element is moved into the closed position, that is to say, for example, when the wing element enters a lock, a counter of the Hall element can be zeroed in order not to add up frequently occurring Hall counters to form an erroneous position detection. However, an erroneous determination of the pivot position can only be corrected after the counter has "zeroed", whereby the pivot position of the opened wing element or the pivot position cannot be determined precisely during the movement of the opened wing element. Furthermore, during operation of the motor vehicle, a deformation of the Hall sensor, also referred to as a Hall sensor, can occur, for example caused by particularly high mechanical loading in the form of particularly high closing forces. As a result, the pivot position of the wing element can be determined incorrectly, as a result of which the wing element cannot be moved sufficiently precisely, for example, but can be moved in particular into an incorrect position.In contrast, the above-mentioned disadvantages can be overcome particularly reliably by means of the detection system according to the invention. The radar reflector, also referred to as a corner element, which is in particular a component with a characteristic or particularly characteristic geometry, which can be clearly and particularly easily recognized by the radar, can be located by means of radar technology and can thus be used for exact position determination. As a result, the current pivot position of the wing element can be determined particularly precisely. The detection system can thus be understood to mean, in particular, a measurement system for detecting or measuring the, in particular current, pivot position of the wing element by means of radar technology. A basic idea of the invention is thus in particular to use the radar reflector for identifying movable body parts in the form of the wing element.Furthermore, it is provided that the radar reflector is to be arranged or arranged on a side door of the motor vehicle. In other words, the wing element is designed as a side door. This means that the radar reflector is to be held or held above the fastening region on the side door, for example on a door part of the side door. Thus, the leaf element part can be the door part, for example an inner door panel, of the side door. It can thus be seen that the current pivot position of the side door can be detected particularly precisely. In the prior art, radar technology can be used in automatic doors for detecting the environment. It can thus be advantageous to use existing radar technology in the form of the radar device or to modify it in order to be able to detect the pivoted position of the side door by arranging the radar reflector on the side door, in particular on the door part. Such conventional radar technology can be provided, for example, for detecting the collision of the side door with an object. Therefore, for the determination of the pivot position of the side door, for example, the same radar technique can be used as for the collision detection. As a result, the pivoted position can be determined with particularly low outlay. Thus, for example, the manufacturing cost of the motor vehicle can be kept particularly low. Alternatively, however, it is possible to use a different radar system as the radar device, and thus not to use the radar system for collision detection for determining the swivel position. This can have a positive effect on the production costs of the motor vehicle, namely when lower accuracy requirements are placed on the determination of the pivoted position than on the determination of the collision.Furthermore, it is provided that the radar reflector is to be held or held via the fastening region at an end of the side door facing away from a door hinge of the side door. This means that the side door, in particular the door part, has an end facing the door hinge and the end facing away from the door hinge, wherein the radar reflector is arranged in the region, in particular in the immediate vicinity, of the end of the side door facing away from the door hinge. Thus, the radar reflector is arranged, for example, at a rear end of the side door in the vehicle longitudinal direction of the motor vehicle, in particular at a rear edge of the side door or of the door part. As a result, the radar reflector can be arranged in a region which experiences a particularly large, in particular the largest possible, travel path when the side door is pivoted about the pivot axis. As a result, the pivot position can be determined particularly precisely. In particular, measurement errors can be kept particularly low in this case.In a further embodiment, it is provided that the radar reflector is designed as an angle reflector. This means that an angle reflector is used as the radar reflector. The corner reflector preferably has at least one base element which has a plurality of surfaces which extend obliquely or perpendicularly to one another, in particular electrically conductive surfaces. For example, the base element has two or three electrically conductive surfaces which are at an angle of 90 degrees with respect to one another. In particular, if a wavelength of the electromagnetic waves emitted by the radar device and incident on the corner reflector is small compared to geometric dimensions of the corner reflector, retroreflective may be present according to purely optical laws. Incident electromagnetic waves can be reflected by double or triple reflection in exactly the direction from which they come. Even small objects with a low reflection surface can thereby acquire a particularly strong reflection back in the direction of a radiation source, i.e. in the direction of the radar device. As a result, a much stronger radar echo can be brought about than in other reflecting bodies, as a result of which the radar reflector and thus the wing element can be detected particularly well by means of radar technology. The pivot position of the wing element can thus be determined particularly precisely.In a further embodiment, it is provided that the radar reflector has at least one fastening region, by means of which the radar reflector is to be held or held, for example directly, on an inner side of the wing element, in particular of the wing element part. This means that the radar reflector can be fastened or is fastened via the fastening region on the inner side of the wing element, in particular on the wing element part. In other words, the radar reflector is to be arranged or arranged on the inside of the wing element. The inner side is understood in the present case in particular to mean an inner surface of the wing element facing away from an outer side of the wing element. For example, the inner side of the wing element is a side facing an interior of the motor vehicle. The interior space, which can also be referred to as a vehicle interior space, is understood in the present case to mean a passenger space or a passenger space. As a result, the radar reflector can be reached particularly well by the electromagnetic waves emitted by the radar device, as a result of which the pivot position can be determined particularly precisely. The radar reflector can thus be recognized particularly well by means of radar technology.In a further refinement, it is provided that at least one radar sensor of the radar device has a connection region, via which the radar sensor is to be arranged or arranged on a side sill of the motor vehicle. In other words, at least the radar sensor of the radar device is attachable or attached via the connection region to a side sill part of the side sill, for example directly. As a result, the pivoted position can be determined particularly precisely, since an installation position of the radar device on or in the side sill is particularly advantageous for this purpose on account of a particularly short distance from the side door. Furthermore, usually already corresponding installation space is present on or in the side sill. Furthermore, the radar device, in particular the radar sensor, can be installed on the side sill particularly in an imperceptible manner, for example, by at least the radar sensor being covered by a cover element, which is part of the side sill, for example. The radar sensor comprises, for example, the transmitting device and / or the receiving device of the radar device.Overall, it can be seen that radar technology can be installed in the side sill and the radar reflector can be arranged on the side door, as a result of which the side door can be detected particularly easily by the radar. In this case, the radar reflector can be arranged on an inner door side of the side door and be located by means of radar technology and can thus be used as exact position determination.A second aspect of the invention relates to a motor vehicle, which in particular has a detection system according to the first aspect of the invention. Advantages and advantageous configurations of the first aspect of the invention are to be regarded as advantages and advantageous configurations of the second aspect of the invention and vice versa.The motor vehicle has at least one wing element which is held on a body component of the motor vehicle so as to be pivotable about a pivot axis, for example directly.In order to be able to determine or detect a particularly precise, in particular current, pivot position of the wing element, the motor vehicle has at least one radar device and at least one radar reflector is arranged on the wing element, which radar reflector is detectable or detected by means of radar or radar technology for determining, in particular calculating, the particularly current, pivot position of the wing element by means of the radar device.It is provided that the wing element is designed as a side door. The radar reflector has a fastening region, by means of which the radar reflector is held at an end of the side door facing away from a door hinge.For example, at least one radar sensor of the radar device is arranged in a side sill of the motor vehicle. The side sill may also be referred to simply as a sill.A third aspect of the invention relates to a method for determining at least one pivot position of a wing element of a motor vehicle, which wing element is held on a body component such that it can be pivoted about a pivot axis, in particular according to the second aspect of the invention. Advantages and advantageous configurations of the first and second aspect of the invention are to be regarded as advantages and advantageous configurations of the third aspect of the invention and vice versa. The method can be understood in particular as a method for operating a detection system according to the first aspect of the invention.The wing element is designed as a side door. The radar reflector has a fastening region, by means of which the radar reflector is held at an end of the side door facing away from a door hinge.In order to be able to detect the, in particular current, pivot position of the wing element particularly precisely, a radar reflector arranged on the wing element is detected according to the invention by means of at least one radar device of the motor vehicle, as a result of which the pivot position of the wing element is determined, in particular calculated, by means of the radar device.A fourth aspect of the invention relates to a method for pivoting a wing element of a motor vehicle, which wing element is held on a body component such that it can be pivoted about a pivot axis, in particular according to the second aspect of the invention. Advantages and advantageous configurations of the first, the second and the third aspect of the invention are to be regarded as advantages and advantageous configurations of the fourth aspect of the invention and vice versa.In the method, a pivot position of the wing element is determined according to a method according to the third aspect of the invention, and the wing element is moved or pivoted about the pivot axis by means of an electric machine as a function of the determined pivot position. Thus, the wing element is moved by means of the electric machine, for example, into a first target position when a first starting position is determined or has been determined by means of the radar device as a pivot position, and the wing element is moved by means of the electric machine, for example, into a second target position different from the first target position when a second starting position different from the first starting position is determined or has been determined by means of the radar device as a pivot position.Further features of the invention are evident from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination but also in other combinations or alone.The invention will now be explained in more detail on the basis of a preferred exemplary embodiment and with reference to the drawings. The following are shown: FIG. 1 is a schematic and perspective partial view of a motor vehicle according to the invention; and FIG. 2 shows a schematic representation of a detection system according to the invention; and FIG. 3 shows a schematic perspective view of a radar reflector of a detection system according to the invention according to an embodiment; and FIG. 4 shows a schematic perspective view of a radar reflector of a detection system according to the invention according to a further embodiment.In the figures, identical or functionally identical elements are provided with identical reference symbols.FIG. 1 shows a schematic and perspective partial view of a motor vehicle 1, which is preferably designed as a passenger car. The motor vehicle has an interior 2, which can also be referred to as a vehicle interior. As shown in FIG. 1, at least one seating system 3 for seating at least one person is arranged in the interior 2. The seat system 3 can also be referred to as a vehicle seat. The interior 2 is at least partially, in particular predominantly or completely, delimited or formed by a, preferably self-supporting, body 4 of the motor vehicle 1.The motor vehicle 1 has at least one wing element 5, which is designed as a side door 6 in the exemplary embodiment. The side door 6 has, for example, a door part 7, which is designed in the present case as an inner door part. The door inner part is, for example, an inner door panel. For example, the side door 6 has at least one door outer part which is arranged further outwards than the door inner part, in particular in the transverse direction of the vehicle 1. Thus, the door inner part is arranged, for example, on an inner side 8 of the side door 6, which inner side points inwards in particular in the vehicle transverse direction of the motor vehicle, whereas the door outer part is arranged on an outer side of the side door 6, which outer side points outwards.The side door 6, in particular the door part 7, is held on a body component 10 of the motor vehicle 1, in particular the body 4, such that it can be pivoted about a pivot axis 9. For this purpose, the motor vehicle 1 has, for example, a holding device 11 by means of which the side door 6 is fastened or fastened to the body component 10 such that it can be pivoted, for example at least indirectly or directly, about the pivot axis 9 relative to the body component 10. The holding device 11 is designed, for example, as a door hinge. Here, the body component 10 is a side frame, for example an A-pillar or a B-pillar of the side frame.In the present case, the motor vehicle 1 has at least one electric machine, by means of which the side door 6 is pivotable or pivoted about the pivot axis 9 relative to the body component 10. The side door 6 is thus designed as an automatically actuatable or movable side door 6.In the exemplary embodiment, the side door 6 is pivotable about the pivot axis 9 between at least one open position 12 and one closed position. In FIG. 1, the side door 6 is shown in the open position 12. As shown in FIG. 1, the side frame has at least one opening 13, which can also be referred to as a door opening. Via the opening 13, the interior 2 opens into an environment 14 of the motor vehicle 1. In the open position 12, the opening 13 is at least partially, in particular predominantly or completely, exposed from the side door 6. As a result, in the open position 12, a person can enter the motor vehicle 1 and / or exit the motor vehicle 1. This means that in the open position 12 the person can pass from the environment 14 into the interior 2 and / or can pass from the interior 2 into the environment 14 and can thus leave the motor vehicle 1. In the closed position, this is prevented. This means that in the closed position the person cannot pass from the environment 14 into the interior 2 via the opening 13 and cannot leave the interior 2 via the opening 13.FIG. 2 shows a particularly schematic illustration of a detection system 15 for ascertaining, i.e. in particular for determining, an in particular current, pivot position 16 of the side door 6 of the motor vehicle 1. This means that the detection system 15 is integrated into the motor vehicle 1. In the example shown in FIG. 1, the pivot position 16 to be determined or determined is the open position 12, but in particular by means of the detection system each further pivot position of the side door 6, for example the closed position or an intermediate position different from the open position 12, can be determined or determined.In order to be able to determine the pivot position 16 of the side door 6 particularly precisely, the detection system 15 has a radar device 17 which is to be arranged or is arranged in the motor vehicle 1. The motor vehicle 1 thus has the radar device 17. Furthermore, the detection system 15 has a radar reflector 18 to be arranged or arranged on the side door 6, in particular on the door part 7, for example directly. In other words, the side door 6 has the radar reflector 18 which is fastened to the door part 7. The radar reflector 18 can be detected by means of radar or radar technology for determining the pivot position 16 by means of the radar device 17. In other words, the pivot position 16 of the side door 6 is detected by detecting the radar reflector 18 by means of the radar device 17, in particular based on radar technology. The radar reflector 18 is formed separately from the door part 7, in particular the side door 6.In the present case, the radar device 17 has at least one radar sensor 19, which preferably has a receiving device and a transmitting device. The transmitting device can also be referred to as a radar transmitter and the receiving device can also be referred to as a radar receiver. Radar device 17 preferably has an electronic computing device 20, which is coupled to radar sensor 19. For example, it is provided that at least one signal characterizing the radar reflector 18, in particular a position of the radar reflector 18, is detectable or detected by means of the radar sensor 19, wherein the pivot position 16 of the side door 6 is determinable or determined, in particular is calculable or calculated, by means of the electronic computing device 20 as a function of the detected signal.FIGS. 3 and 4 show the radar reflector 18 in a respective schematic perspective view according to a respective embodiment. In the exemplary embodiment, the radar reflector 18 is designed as an angle reflector 21. As can be seen in FIGS. 3 and 4, the corner reflector 21 in the present case has a plurality of surfaces 22, which extend obliquely or perpendicularly relative to one another. Electromagnetic waves emitted by the radar device 17 can be reflected on these surfaces 22 and thereby reflected back to the radar device 17, in particular to the radar sensor 19, as a result of which the corner reflector 21 can be detected particularly well. The reflected or returned electromagnetic waves are illustrated in FIG. 4 by means of arrows 23. In the present case, the radar reflector 18 or the corner reflector 21 is understood to mean a passive radar reflector 18 or passive corner reflector 21.In the embodiment shown in FIG. 1, the radar reflector 18 is arranged on the inner side 8 of the side door. Thus, the radar reflector 18 in the present case has a fastening region, not shown in the figures, by means of which the radar reflector 18 is to be held or held on the inner side 8, for example on the door part 7, in particular directly.As can likewise be seen in FIG. 1, the side door 6 is fastened to the body component 10 in the present case on a side 24 facing the door hinge via the holding device 11 designed as a door hinge 11 a. The side 24 facing the door hinge is in the exemplary embodiment a side facing forwards in the longitudinal direction of the vehicle 1, in particular in the closed position, which side can also be referred to as the front end of the side door 6. However, the radar reflector 18 is arranged in the present case on a side 25 of the side door 6 facing away from the door hinge 11 a. This means that the radar reflector 18 is to be held or held via its fastening region at an end 26 of the side door 6 facing away from the door hinge 11 a. In the exemplary embodiment, the side 26 facing away from the door hinge 11 ais, in particular in the closed position, a rear side of the side door 6 with respect to the vehicle longitudinal direction of the motor vehicle 1. Radar reflector 18 is preferably situated at a rear edge of side door 6, in particular of door part 7. Radar reflector 18 is particularly preferably arranged in a lower region on end 26 of side door 6 or door part 7 with respect to a vehicle vertical direction of motor vehicle 1. The radar reflector 18 can thus be arranged at the rear edge, with respect to the vehicle vertical direction, on the lower inside on the side door 6 or the door part 7. As a result, the radar reflector 18 experiences a particularly large travel path during the pivoting of the side door 6, as a result of which the pivoting position 16 of the side door 6 can be determined particularly precisely.In the exemplary embodiment shown in FIG. 1, it is provided that at least radar sensor 19, in particular radar device 17, is situated on a side sill 27, in particular in side sill 27 or within side sill 27. Radar sensor 19 thus has, for example, a connection region, not shown in the figures, via which radar sensor 19 is situated or situated on side sill 27, in particular in side sill 27, in particular being able to be fastened or fastened. For example, the side sill 27 has a receiving space in which the radar sensor 19, in particular the radar device 17, is arranged. The receiving space can be understood to mean a cavity which is bounded or formed, for example, by at least one sill part of the side sill 27 towards the outside, in particular towards the outside in the vehicle transverse direction. Particularly preferably, the radar sensor 19, in particular the radar device 17, is at least partially, in particular predominantly or completely, covered by a cover element formed, for example, by the sill part of the side sill 27. As a result, the radar device 17 can be integrated particularly non-significantly into the motor vehicle or the side sill 27 and in particular can be protected particularly well against damage. For example, a main extension direction of the radar reflector 18 is less than 10 cm, in particular less than 5, 3, 2 or 1 cm. The radar reflector 18 thus has a cross section which is less than 10 x 10 cm, in particular less than 5 x 5 cm, 3 x 3 cm, 2 x 2 cm or 1 x 1 cm. As a result, the radar reflector can be integrated in the side door 6 on the one hand in an imperceptible manner and on the other hand act as a design element.By means of the detection system 15, a method for determining the pivot position 16 can be carried out, in which the radar reflector 18 arranged on the side door 6, in particular on the door part 7, is detected or detected by means of the radar device 17, in particular by means of the radar sensor 19, as a result of which the pivot position 16 of the side door 6 is determined or detected by means of the radar device 17, in particular by means of the electronic computing device 20. Depending on the ascertained pivot position 16, the side door 6 can be pivoted about the pivot axis 9 by means of the electric machine. The electric machine can thus be coupled to the radar device 17, in particular to the electronic computing device 20.List of reference characters1 Motor vehicle 2 interior 3 seat system 4 body 5 wing element 6 side door 7 door part 8 inner side 9 pivot axis 10 body component 11 holding device 11 adoor hinge 12 open position 13 opening 14 surroundings 15 detection system 16 pivot position 17 radar device 18 radar reflector 19 radar sensor 20 electronic computing device 21 corner reflector 22 surface 23 arrow 24 side 25 facing away from the door hinge 26 end 27 side sill

Claims

Detection system (15) for determining a pivot position (16) of a wing element (5) of a motor vehicle (1), wherein the detection system (15) has a radar device (17) to be arranged in the motor vehicle (1) and a radar reflector (18) to be arranged on the wing element (5), which radar reflector is detectable by means of radar for determining the pivot position (16) of the wing element (5) by means of the radar device (17) and the radar reflector (18) is to be arranged on a side door (6) of the motor vehicle (1), characterized in that the radar reflector (18) has a fastening region via which the radar reflector (18) is to be held at an end (26) of the side door (6) facing away from a door hinge (11a).Detection system (15) according to Claim 1, characterized in that the radar reflector (18) is designed as an angle reflector (21).Detection system (15) according to claim 1 or 2, characterised in that the radar reflector (18) has a fastening region, by means of which the radar reflector (18) is to be held on an inner side (8) of the wing element (5).Detection system (15) according to one of the preceding claims, characterized in that a radar sensor (19) of the radar device (17) has a connection region, via which the radar sensor (19) is to be arranged on a side sill (27) of the motor vehicle (1).Motor vehicle (1) having a wing element (5) which is held on a body component (10) of the motor vehicle (1) such that it can be pivoted about a pivot axis (9), wherein the motor vehicle (1) has a radar device (17) and a radar reflector (18) is arranged on the wing element (5), which radar reflector can be detected by means of the radar device (17) in order to determine a pivot position (16) of the wing element (5) and the wing element (5) is designed as a side door (6), characterized in that the radar reflector (18) has a fastening region via which the radar reflector (18) is held on an end (26) of the side door (6) facing away from a door hinge (11a).Motor vehicle (1) according to Claim 5, characterized in that a radar sensor (19) of the radar device (17) is arranged in a side sill (27) of the motor vehicle.Method for determining a pivot position (16) of a wing element (5) of a motor vehicle (1) held on a body component (10) such that it can be pivoted about a pivot axis (9) and designed as a side door (6), wherein a radar reflector (18) arranged on the wing element (5) is detected by means of a radar device (17) of the motor vehicle (1), as a result of which the pivot position (16) of the wing element (5) is determined by means of the radar device (17), characterized in that the radar reflector (18) has a fastening region by means of which the radar reflector (18) is held on an end (26) of the side door (6) facing away from a door hinge (11a).Method for pivoting a wing element (5) of a motor vehicle (1) held on a body component (10) such that it can be pivoted about a pivot axis (9), in which a pivot position (16) of the wing element (5) is determined according to a method according to Claim 7 and the wing element (5) is pivoted about the pivot axis (9) by means of an electric machine as a function of the determined pivot position (16).

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