EP4633876A1 - Kalibrieren einer greifersteuerung - Google Patents
Kalibrieren einer greifersteuerungInfo
- Publication number
- EP4633876A1 EP4633876A1 EP23808745.6A EP23808745A EP4633876A1 EP 4633876 A1 EP4633876 A1 EP 4633876A1 EP 23808745 A EP23808745 A EP 23808745A EP 4633876 A1 EP4633876 A1 EP 4633876A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- finger
- actual
- robot arm
- pose
- gripper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1694—Program controls characterised by use of sensors other than normal servo-feedback from position, speed or acceleration sensors, perception control, multi-sensor controlled systems, sensor fusion
- B25J9/1697—Vision controlled systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1612—Program controls characterised by the hand, wrist, grip control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1656—Program controls characterised by programming, planning systems for manipulators
- B25J9/1669—Program controls characterised by programming, planning systems for manipulators characterised by special application, e.g. multi-arm co-operation, assembly, grasping
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
- G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
- G06T7/74—Determining position or orientation of objects or cameras using feature-based methods involving reference images or patches
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20081—Training; Learning
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20084—Artificial neural networks [ANN]
Definitions
- Robot arms that guide finger grippers are known per se. If the robot arm and/or gripper fingers are controlled based on target values, the actual poses of gripper fingers relative to a base of the gripper and/or relative to a base of the robot arm can deviate from the desired target poses, for example due to deformations, tolerances or the like.
- a robot arm has at least three, in particular at least six, in one embodiment at least seven, joints or (movement) axes, preferably at least three, in particular at least six, in one embodiment at least seven, rotary joints or rotary axes, as well as a (distal) robot base and a (proximal) end flange to which a gripper is attached, preferably non-destructively detachable or replaceable, which has a one- or multi-part gripper base, in one embodiment arranged on the end flange of the robot arm, and one, two or more (gripper) fingers that are adjustable relative to this gripper base, in one embodiment electromagnetically, in particular electromotorically, hydraulically and/or pneumatically.
- a method for calibrating a controller that is provided or set up or used to control the robot arm and/or the gripper guided by the robot arm comprises the steps of:
- the method comprises the step preceding the recording of the first image of bringing at least the first finger, preferably all fingers, and/or the gripper base of the gripper into the field of view or recording of the recording device, in a further development by appropriate adjustment of the robot arm and/or moving and/or focusing of the recording device.
- One embodiment of the present invention is therefore based on the idea of using a recording device to optically calibrate the control, in particular in such a way that the calibrated control controls the robot arm and/or the gripper guided by it in such a way that an actual pose of one or more gripper fingers thus approached deviates less from a desired target pose than before or without calibration.
- An (actual robot arm) position of the robot arm is determined in one embodiment by the positions of its joints or axes and/or a pose of its end flange or a fixed reference relative to the robot arm base.
- a pose in the sense of the present invention comprises in one embodiment a one-, two- or three-dimensional position and/or a one-, two- or three-dimensional orientation.
- a target pose and/or an actual pose of a finger of the gripper describes a one-, two- or three-dimensional position and/or a one-, two- or three-dimensional orientation of the finger, preferably relative to the robot arm base or particularly preferably relative to the gripper base, in one embodiment, a one-, two- or three-dimensional position and/or a one-, two- or three-dimensional orientation of a fingertip of the finger, preferably relative to the robot arm base or particularly preferably relative to the gripper base.
- a target pose is determined on the basis of a commanded and/or, in a further development, sensor-detected position of the corresponding finger relative to the gripper base; in particular, it can be such a position or it can be determined on the basis of a kinematic model of the gripper.
- a target pose in the sense of the present invention can comprise the travel a and/or one or more, in particular all, components of the position [x(a) y(a) z(a)] T , ie the target pose can comprise, in particular, the commanded or, in a further development, sensor-detected travel a and/or the position determined therefrom by means of forward kinematics, for example x(a).
- the method in an embodiment analogous to the steps described above comprises the following steps:
- the method in an embodiment analogous to the steps described above comprises the following steps:
- control of multi-finger grippers can be calibrated particularly advantageously, and in another embodiment, more quickly. If reference is made to a second finger below, the same features can also be implemented for a third finger of the gripper in one embodiment, without this being specifically mentioned in each case.
- the method comprises the steps:
- the procedure in further training includes the following steps:
- two or more actual robot arm positions of the finger(s) are used or utilized in an embodiment for calibration.
- the method in one embodiment comprises the steps:
- two or more images with different actual finger positions of the finger or one or more fingers can advantageously be taken in or at one or more actual robot arm positions (each), from which different actual poses of the finger or one or more fingers can be determined and used together with the associated target poses for calibration. Since the adjustment of gripper fingers can often be carried out more quickly (than the adjustment of the robot arm) and does not require an adjustment of the robot arm, which often requires a correspondingly larger work space, this can improve calibration in one embodiment, in particular precision, reliability, feasibility, safety and/or speed. In addition, errors in the robot arm position do not accumulate in one embodiment.
- two or more images can advantageously be taken in or at different actual robot arm positions with the same or different actual finger positions of the finger or one or more of the fingers (each), from which different actual poses of the finger or one or more of the fingers can be determined and used together with the associated target poses for calibration, in particular in or at different actual robot arm positions (each) images with the same actual finger position of the finger or the same actual finger positions of the fingers can be taken.
- this allows particularly advantageous actual finger positions, preferably large adjustment ranges of the gripper, to be used.
- the view of the gripper by the recording device can be improved, in particular partial obscurations or the like can be at least partially compensated.
- errors resulting from the robot arm positions can be taken into account or averaged out.
- the two above aspects can be advantageously combined by taking images with the first and second actual finger positions of the first and possibly second finger in or at the first actual robot arm position and taking images with at least two different actual Finger position of the first and possibly second finger is recorded, actual poses of the finger(s) are determined from this and used together with the associated target poses for calibration.
- One of the at least two different actual finger positions at or in the second actual robot arm position can be the first or second actual finger position of the respective finger at or in the first actual robot arm position, whereby in one embodiment the same actual finger position can be used multiple times and in particular effort and/or errors as a result of adjusting the respective finger can be reduced.
- different finger positions can also be used in the first and second robot arm positions, whereby in one embodiment even more different constellations can be taken into account in the calibration and this, in particular its precision, validity and/or reliability, can be further improved.
- the method in one embodiment comprises the steps:
- both a pose of a finger for a second actual finger position and a pose of a finger for a second actual robot arm position are each referred to as a second pose of the finger. Accordingly, in particular - a pose of a finger for an actual finger position A for an actual robot arm position B a second pose of this finger; and
- one aspect refers to a second pose and the other aspect refers to a further or different second pose of the respective finger.
- a second pose of one aspect and a second pose of the other aspect can be one and the same pose (in particular, a second pose of the first finger can be a pose of the first finger at the second actual robot arm position and the second actual finger position of the first finger), or a second pose of one aspect and a second pose of the other aspect can be different poses (in particular, a second pose of the first finger can be a pose of the first finger at the second actual robot arm position and the first actual finger position of the first finger and another or different second pose of the first finger can be a pose of the first finger at the first actual robot arm position and the second actual finger position of the first finger).
- Calibrating the control system comprises in one embodiment a determination, in a further development a parameterization and/or storage, of a mapping between actual poses and target poses of the first finger and/or a mapping between actual poses and target poses of the second finger of the gripper, in a further development an assignment of target poses of the corresponding finger to (approaching) desired Target poses and/or an assignment of actual poses of the corresponding finger to, in particular, commanded or recorded, target poses.
- the calibration of the control in one embodiment comprises determining, in a further development parameterizing and/or storing, a correction between actual poses and target poses of the first finger and/or a correction between actual poses and target poses of the second finger of the gripper, in a further development a correction of target poses of the corresponding finger for approaching desired target poses and/or a correction of actual poses of the corresponding finger for, in particular, commanded or recorded, target poses.
- the mapping or correction can be different for different robot arm and/or finger positions, whereby the precision can be increased in one embodiment.
- the mapping or correction can also have a constant offset, which can advantageously be determined by averaging or the like.
- calibration can involve determining the parameters k, x 0 in such a way that positions xn, x 2i determined for a first actual robot arm position and adjustment paths ai, a 2 and positions xi 2 , x 32 determined for a second actual robot arm position and adjustment paths ai , a 3 . +
- a first and/or second actual pose of the first and/or second finger is determined on the basis of a theoretical, preferably kinematic model of the gripper and/or on the basis of object recognition.
- the recording device particularly preferably comprises a recording device for recording digital and/or three-dimensional images, and can in particular have at least one 3D camera and/or at least two spatially spaced cameras and/or at least one scanner, preferably for three-dimensional scanning.
- an image mentioned here has a point cloud, preferably a three-dimensional point cloud, and can in particular be such or consist of such.
- a three-dimensional point cloud recorded with the aid of a recording device is referred to in particular as an image (recorded with the aid of the recording device), which in one embodiment is generally a three-dimensional image.
- a system for calibrating the control for controlling the robot arm and/or the gripper guided by the robot arm in a further development a system for controlling the robot arm and/or gripper, in particular hardware and/or software, in particular program technology, for carrying out a method described here is set up and/or has:
- a recording device for recording a first image of the robot-guided gripper at a first actual robot arm position of the robot arm and a first actual finger position of a first finger of the gripper relative to a base of the gripper;
- controller for controlling the robot arm and/or gripper which in turn comprises:
- the control can be distributed or have distributed means; in particular, in one embodiment it can have a module for controlling the robot arm and/or gripper and a separate module for calibrating this module for controlling.
- system or its control or its means comprises:
- system or its control or its means comprises:
- system or its control or its means comprises:
- system or its control or its means comprises:
- system or its control or its means comprises:
- the system or its control or its means comprises: means for determining, in particular parameterizing and/or storing, a mapping and/or correction between actual poses and target poses of a finger of the gripper for calibrating the control.
- the system or its controller or its means comprises: means for determining an actual pose of a finger on the basis of an image, on the basis of image processing of this image and/or a theoretical model of the gripper, in particular on the basis of object recognition.
- a system and/or means in the sense of the present invention can be designed in terms of hardware and/or software, in particular at least one, preferably data- or signal-connected, particularly digital, processing unit, particularly microprocessor unit (CPU), graphics card (GPU) or the like, and/or one or more programs or program modules.
- the processing unit can be designed to process commands that are implemented as a program stored in a memory system, to detect input signals from a data bus and/or to output output signals to a data bus.
- a memory system can have one or more, particularly different, storage media, particularly optical, magnetic, solid-state and/or other non-volatile media.
- the program can be designed in such a way that it embodies or is capable of carrying out the methods described here, so that the processing unit can carry out the steps of such methods and thus in particular calibrate the control or operate the robot arm with the gripper guided by the robot arm.
- a computer program product can have, in particular be, a storage medium, in particular a computer-readable and/or non-volatile one, for storing a program or instructions or with a program or instructions stored thereon.
- execution of this program or these instructions by a system or a controller causes the system or the controller, in particular the computer(s), to carry out a method described here or one or more of its steps, or the program or the instructions are set up for this purpose.
- one or more, in particular all, steps of the method are fully or partially computer-implemented or one or more, in particular all, steps of the method are fully or partially automated, in particular by the system or its means.
- Fig. 1 a system for calibrating a controller for controlling a robot arm and a gripper guided by the robot arm according to an embodiment of the present invention
- Fig. 2 a method for calibrating the controller according to an embodiment of the present invention.
- Fig. 1 shows a system for calibrating a controller 3 for controlling a robot arm 10 and a gripper guided by the robot arm according to an embodiment of the present invention.
- the robot arm 10 has a robot base 11, six rotary joints, the positions of which are indicated by qi, ..., q 6 , and an end flange 12 to which a base 20 of the gripper is attached, on which a first finger 21 and a second finger 22 of the gripper are arranged in a translationally adjustable manner, the adjustment of which for opening or closing the gripper is indicated by double movement arrows.
- the controller 3 communicates with the robot arm 10 and gripper, in particular their drives (not shown), and a 3D recording device 4.
- a first step S10 (see Fig. 2), the robot arm 10 is adjusted so that the gripper can be captured as well as possible by the 3D recording device 4.
- the two fingers 21, 22 have, by way of example, the actual finger positions indicated in Fig. 1 relative to the gripper base 20.
- a first image of the robot-guided gripper is recorded using the 3D recording device 4 at this first actual robot arm position of the robot arm and this first actual finger position of the first finger 21 and second finger 22.
- a first actual pose of the first finger 21 and a first actual pose of the second finger 22 are determined on the basis of this first image, each relative to the gripper base 20.
- the first actual pose y 2i of the first finger 21 relative to the gripper base 20 is symbolized by an arrow that indicates a position of the fingertip 21A in a gripper base-fixed coordinate system K 20.
- This Determination is carried out in a manner known per se and therefore not explained in more detail here, for example by detecting edges or corners of the fingers 21, 22 and the gripper base in a point cloud recorded using the 3D recording device, advantageously on the basis of a CAD model of the gripper.
- a first target pose of the first finger and a first target pose of the second finger 22 are determined for these first actual finger positions and this first actual robot arm position, as they result from the commanded or approached, in one embodiment sensor-detected, actual finger positions of the first finger 21 and second finger 22, each relative to the gripper base 20 and a corresponding kinematic model of the gripper.
- the first target pose x 2i of the first finger 21 relative to the gripper base 20 is symbolized by an arrow.
- the configuration 21 ' of the first finger 21 according to the kinematic model is indicated in dashed lines. It can be seen that the actual pose y 2i deviates from the target pose x 2i , so that the fingertip 21 A does not have the desired pose, which is to be approached by moving or commanding the corresponding robot arm and finger positions.
- the target pose can, for example, also be just a one-dimensional position or adjustment path of the finger relative to the gripper base 20 in its adjustment direction, wherein each such position can then be assigned, for example, the three-dimensional actual position of the fingertip realized thereby or, conversely, each three-dimensional actual position of the fingertip can be assigned a corresponding one-dimensional position of the finger relative to the gripper base 20 in order to approach it.
- the determination of the first target poses or step S40 can also be carried out before or during the adjustment of the robot arm 10 (step S10), taking the image (step S20) or determining the actual poses (step S30).
- a step S50 in the first actual robot arm position, ie (still) without adjusting the robot arm 10, the first finger 21 and the second finger 22 are each adjusted to a second actual finger position and, in the manner explained above with reference to steps S20-S40, an image of the robot-guided gripper is taken at the first actual robot arm position and with the second actual finger positions, from this the respective (second) actual pose of the first or second finger is determined and the corresponding (second) target poses of the first and second fingers are determined from the commanded or approached actual finger positions, which are detected by sensors in one embodiment.
- a step S60 the robot arm 10 is adjusted to a second actual robot arm position, i.e. one or more of the joint positions qi, ..., q 6 are changed, and in the manner explained above with reference to steps S20-S40 or S50, an image of the robot-guided gripper is taken in this second actual robot arm position and with the second actual finger positions, and from this a (further second) actual pose of the first or second finger is determined. Since, as explained above, the actual poses are each determined relative to the gripper base 20, the associated target poses advantageously do not change, so that their determination already took place in step S50 or the target poses determined thereby can also be adopted as target poses for the second actual robot arm position and second actual finger positions and can thus be determined.
- a step S70 in the second actual robot arm position, i.e. without adjusting the robot arm 10, the first finger 21 and the second finger 22 are each adjusted to the above-explained first or another actual finger position and, in the manner explained above with reference to steps S20-S40, S50 or S60, an image of the robot-guided gripper is taken in the second actual robot arm position and with these first or other actual finger positions, from which a (different second) actual pose of the first or second finger is determined and the corresponding (second) target poses of the first and second fingers are determined from the commanded or approached actual finger positions, which are detected by sensors in one embodiment.
- a step S80 the controller 3 is calibrated on the basis of these actual and target poses of the two fingers 21, 22 determined for the various robot arm and finger positions.
- an offset is calculated between the one-dimensional position of the respective finger relative to the gripper base 20 in its Adjustment direction and the corresponding position of the fingertip are parameterized in such a way that the deviation in amount between the target and actual poses is minimal on average.
- more complex images can also be advantageously determined, which assign the respective commanded positions of the fingers to the corresponding actual fingertip poses (forward kinematics or transformation) or, conversely, assign the desired fingertip poses to the commanded finger positions (backward kinematics or transformation).
- step S90 the robot arm 10 and the gripper guided by the robot arm are controlled using the controller calibrated in step S80.
- one or more additional finger positions and/or one or more additional actual robot arm positions, each with one or more actual finger positions can be approached, corresponding additional actual poses of the finger(s) can be determined from corresponding images and taken into account or used during calibration.
- a broader database can advantageously be used for calibration and precision, validity and/or reliability can thereby be improved.
- the exemplary embodiments are merely examples that are not intended to limit the scope of protection, applications and structure in any way.
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Manipulator (AREA)
- Image Analysis (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022213568.7A DE102022213568B3 (de) | 2022-12-13 | 2022-12-13 | Kalibrieren einer Steuerung |
| DE102022213555.5A DE102022213555A1 (de) | 2022-12-13 | 2022-12-13 | Objektlagedetektion mit automatisierter Merkmalsextraktion und/oder Merkmalszuordnung |
| DE102022213557.1A DE102022213557B3 (de) | 2022-12-13 | 2022-12-13 | Betreiben eines Roboters mit Greifer |
| DE102022213562.8A DE102022213562A1 (de) | 2022-12-13 | 2022-12-13 | Greifen mit Verpackungsmaterial |
| PCT/EP2023/081831 WO2024125920A1 (de) | 2022-12-13 | 2023-11-15 | Kalibrieren einer greifersteuerung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4633876A1 true EP4633876A1 (de) | 2025-10-22 |
Family
ID=88838801
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23808745.6A Pending EP4633876A1 (de) | 2022-12-13 | 2023-11-15 | Kalibrieren einer greifersteuerung |
| EP23809139.1A Pending EP4634861A1 (de) | 2022-12-13 | 2023-11-15 | Objektlagedetektion mit automatisierter merkmalsextraktion und/oder merkmalszuordnung |
| EP23808744.9A Pending EP4633875A1 (de) | 2022-12-13 | 2023-11-15 | Betreiben eines roboters mit greifer |
| EP23808746.4A Pending EP4633877A1 (de) | 2022-12-13 | 2023-11-15 | Greifen mit verpackungsmaterial |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23809139.1A Pending EP4634861A1 (de) | 2022-12-13 | 2023-11-15 | Objektlagedetektion mit automatisierter merkmalsextraktion und/oder merkmalszuordnung |
| EP23808744.9A Pending EP4633875A1 (de) | 2022-12-13 | 2023-11-15 | Betreiben eines roboters mit greifer |
| EP23808746.4A Pending EP4633877A1 (de) | 2022-12-13 | 2023-11-15 | Greifen mit verpackungsmaterial |
Country Status (3)
| Country | Link |
|---|---|
| EP (4) | EP4633876A1 (de) |
| CN (4) | CN120344356A (de) |
| WO (4) | WO2024125921A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015089575A (ja) * | 2013-11-05 | 2015-05-11 | セイコーエプソン株式会社 | ロボット、制御装置、ロボットシステム及び制御方法 |
| EP3871172A1 (de) * | 2018-10-25 | 2021-09-01 | Berkshire Grey, Inc. | Systeme und verfahren zum lernen zur extrapolation optimaler zielrouting- und handhabungsparameter |
| DE112019000125B4 (de) * | 2018-10-30 | 2021-07-01 | Mujin, Inc. | Systeme, vorrichtungen und verfahren zur automatisierten verpackungsregistrierung |
| DE102021109036A1 (de) * | 2021-04-12 | 2022-10-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Vorrichtung und verfahren zum lokalisieren von stellen von objekten aus kamerabildern der objekte |
-
2023
- 2023-11-15 WO PCT/EP2023/081832 patent/WO2024125921A1/de not_active Ceased
- 2023-11-15 EP EP23808745.6A patent/EP4633876A1/de active Pending
- 2023-11-15 WO PCT/EP2023/081830 patent/WO2024125919A1/de not_active Ceased
- 2023-11-15 WO PCT/EP2023/081831 patent/WO2024125920A1/de not_active Ceased
- 2023-11-15 CN CN202380085573.6A patent/CN120344356A/zh active Pending
- 2023-11-15 CN CN202380085634.9A patent/CN120359107A/zh active Pending
- 2023-11-15 EP EP23809139.1A patent/EP4634861A1/de active Pending
- 2023-11-15 CN CN202380085633.4A patent/CN120359544A/zh active Pending
- 2023-11-15 WO PCT/EP2023/081829 patent/WO2024125918A1/de not_active Ceased
- 2023-11-15 EP EP23808744.9A patent/EP4633875A1/de active Pending
- 2023-11-15 CN CN202380085574.0A patent/CN120344357A/zh active Pending
- 2023-11-15 EP EP23808746.4A patent/EP4633877A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN120344357A (zh) | 2025-07-18 |
| WO2024125921A1 (de) | 2024-06-20 |
| WO2024125920A1 (de) | 2024-06-20 |
| CN120359544A (zh) | 2025-07-22 |
| EP4633877A1 (de) | 2025-10-22 |
| CN120359107A (zh) | 2025-07-22 |
| WO2024125919A1 (de) | 2024-06-20 |
| WO2024125918A1 (de) | 2024-06-20 |
| EP4634861A1 (de) | 2025-10-22 |
| CN120344356A (zh) | 2025-07-18 |
| EP4633875A1 (de) | 2025-10-22 |
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