EP4594055A1 - Roboterarmkalibrierung - Google Patents
RoboterarmkalibrierungInfo
- Publication number
- EP4594055A1 EP4594055A1 EP23768245.5A EP23768245A EP4594055A1 EP 4594055 A1 EP4594055 A1 EP 4594055A1 EP 23768245 A EP23768245 A EP 23768245A EP 4594055 A1 EP4594055 A1 EP 4594055A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- robot arm
- calibration
- calibration element
- fixed
- positions
- 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
- B25J9/1679—Program controls characterised by the tasks executed
- B25J9/1692—Calibration of manipulator
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/39—Robotics, robotics to robotics hand
- G05B2219/39015—With different manipulator configurations, contact known sphere, ballbar
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/39—Robotics, robotics to robotics hand
- G05B2219/39021—With probe, touch reference positions
Definitions
- the present invention relates to a method for calibrating a robot arm and to a system, computer program or computer program product for carrying out a method described here.
- the object of the present invention is to improve calibration of a robot arm.
- Claims 9 and 10 provide a system or computer program or.
- a robot arm has several, preferably at least three, in particular at least six, in one embodiment at least seven, joints or (movement) axes, in one embodiment rotary joints.
- a measuring device has at least two calibration elements, which can each be designed in one or more parts.
- one of the calibration elements is a calibration element fixed to the robot arm and, in a further development, is arranged in a stationary manner, in one embodiment (non-destructively) detachable, in another embodiment (non-destructively) non-detachable or permanent, on the robot arm, preferably its (distal) end or tool flange or member.
- the or another of the calibration elements is referred to in one embodiment without loss of generality as the first calibration element. In one embodiment, this is fixed relative to a rigid or mobile environment and/or base of the robot arm, in one embodiment it is detachable (non-destructively), in another Designed (non-destructive or) inseparable or permanent, attached to the environment or robot arm base.
- the robot arm-fixed calibration element is movable relative to the first calibration element by adjusting the joints of the robot arm, the first and the robot arm-fixed calibration elements being designed such that when the robot arm-fixed calibration element is displaced relative to the first calibration element in a spatial direction, which in the present case is without limitation of generality is referred to as the first delivery direction, the robot arm-fixed calibration element from different starting positions, which are referred to here as first starting positions without limitation of generality, by the first calibration element, preferably mechanically or positively, (ultimately) in each case into the same, in particular unique, defined, preferably singular or clear, end position is (forced) guided, which is referred to here as the first end position without loss of generality.
- a simple and at the same time preferred example is a funnel for guiding a ball: if the ball is moved into the funnel relative to the funnel, it contacts the funnel surface. During a subsequent further movement into the funnel, the funnel guides the ball inwards to a defined end position. This can preferably be achieved by a ball fixed or guided by the robot arm, but of course also by moving the funnel fixed to the robot arm relative to the ball fixed to the surroundings.
- the method for calibrating the robot arm using the measuring device comprises the steps:
- first joint positions in particular on the basis of the first joint positions and the known, preferably predetermined and/or measured, first end position, wherein the first end position in one embodiment is known, preferably predetermined and/or measured relative to the robot arm, in particular its base, and/or relative to an environment of the robot arm, in particular a base of the measuring device.
- the calibration element fixed to the robot arm can advantageously be arranged reliably, precisely, quickly and/or in different guidance directions, for example also horizontally or vertically upwards or the like, in the first end position and this can be used to calibrate the robot arm.
- the measuring device has at least one further calibration element, which is referred to as a second calibration element without restriction of generality and is also arranged on the environment or robot arm base in a stationary manner relative to the environment and/or base of the robot arm, in one embodiment detachable (non-destructively), in another embodiment (non-destructively) indetachable or permanent.
- a second calibration element without restriction of generality and is also arranged on the environment or robot arm base in a stationary manner relative to the environment and/or base of the robot arm, in one embodiment detachable (non-destructively), in another embodiment (non-destructively) indetachable or permanent.
- the calibration element fixed to the robot arm can also be moved relative to the second calibration element by adjusting the joints of the robot arm, in particular after it has been initially arranged in the first end position and then moved away from this again, wherein the second and the calibration element fixed to the robot arm are designed in such a way that when the calibration element fixed to the robot arm is displaced relative to the second calibration element in a spatial direction, which is referred to here without restriction of generality as the second feed direction, the calibration element fixed to the robot arm different starting positions, which are referred to here without restriction of generality as second starting positions, are each (forcedly) guided by the second calibration element, preferably mechanically or positively, into the same defined end position, which is referred to here without restriction of generality as the second end position.
- the method with respect to the second calibration element comprises the same steps as described above with respect to the first calibration element, or the steps:
- positions of the joints of the robot arm in the second calibration position which are referred to herein as second positions without limiting generality; wherein the robot arm is calibrated on the basis of the first and also these second joint positions, preferably also on the basis of the known second end position specified and/or measured in one embodiment, the second end position in one embodiment being relative to the robot arm, in particular its base, and / or is known, preferably predetermined and/or measured, relative to an environment of the robot arm, in particular a base of the measuring device.
- the measuring device has at least one more
- Calibration element which without limiting the generality as another second or third calibration element is referred to and in one version is also stationary relative to the environment and / or base of the robot arm, in one version (non-destructive) detachable, in another version (non-destructive or) non-detachable or permanent, on the Environment or robot arm base is arranged.
- the calibration element fixed to the robot arm can also be moved relative to the third or further second calibration element by adjusting the joints of the robot arm, in particular after it has been initially arranged in the first end position, then moved away from this again and arranged in the (one) second end position and then moved away from this again, wherein this third or further second and the calibration element fixed to the robot arm are designed in such a way that when the calibration element fixed to the robot arm is displaced relative to the third or further second calibration element in a spatial direction, which is referred to here without restriction of generality as the third or further second feed direction, the calibration element fixed to the robot arm is (forced) from different starting positions, which are referred to here without restriction of generality as the third or further second starting positions, by the third or further second calibration element, preferably mechanically or positively, in each case into the same defined end position, which is referred to here without restriction of generality as the third or further second end position.
- the method has the same steps as described above with reference to the first and (a) second calibration element or the steps:
- Detecting positions of the joints of the robot arm in the third or further second calibration position which are referred to here without restriction of generality as third or further second positions; wherein the robot arm is calibrated on the basis of the first, the (one) second and also this third or further second joint positions, preferably also on the basis of the known, in one embodiment predetermined and/or measured, third or further second end position, wherein this third or further second end position in one embodiment is known, preferably predetermined and/or measured, relative to the robot arm, in particular its base, and/or relative to an environment of the robot arm, in particular a base of the measuring device.
- the calibration in particular its precision, can be improved and/or more dimensions or parameters can be determined in one embodiment.
- the method includes the steps:
- the method in one embodiment comprises the steps:
- different calibration or joint positions of the robot arm can be detected in the same or for the same end position and used for calibration and thereby in particular the calibration, in particular its precision, and/or a time and/or space requirement can be improved and/or more Dimensions or parameters are determined.
- the Calibration element when adjusting the robot arm from the first calibration position to a further calibration position in which the calibration element fixed to the robot arm is arranged in the first end position, when adjusting the robot arm between at least two calibration positions A, B of the robot arm, one of which can be the first calibration position or both calibration positions can be different from the first calibration position, the Calibration element is arranged in the first end position and an orientation of the calibration element fixed to the robot arm relative to the first calibration element is maintained (during this adjustment of the robot arm between the two calibration positions A, B of the robot arm), during the detection, positions of the joints of the robot arm are detected in these at least two calibration positions A, B, and the robot arm is (also) calibrated on the basis of these detected positions of the joints.
- the robot arm when adjusting the robot arm from the or at least one of the second calibration position(s) to the or at least one of the further calibration position(s) in which the calibration element fixed to the robot arm is arranged in the (respective) second end position in which it was arranged in this (respective) second calibration position, when adjusting the robot arm between at least two calibration positions A', B' of the robot arm, one of which can be the (respective) second calibration position or both calibration positions can be different from the (respective) second calibration position, the calibration element fixed to the robot arm is arranged in the (respective) second end position and an orientation of the calibration element fixed to the robot arm relative to the (respective) second calibration element is maintained (when adjusting the robot arm between the two calibration positions A', B' of the robot arm), during the detection, positions of the joints of the robot arm are detected in these at least two calibration positions A', B', and the robot arm is (also) based on these detected positions of the joints calibrated.
- the robot arm (in each case) is adjusted in such a way that it not only maintains the position but also the orientation of the calibration element fixed to the robot arm relative to the respective calibration element, or adjusts it in its corresponding zero space.
- additional joint positions can be approached particularly advantageously for calibration, preferably with a low load on the calibration elements. Additionally or alternatively, in one embodiment, by adjusting the robot arm in this way in its corresponding zero space, additional joint positions can be used for calibration.
- the calibration element fixed to the robot arm when adjusting the robot arm from the first calibration position to a further calibration position in which the calibration element fixed to the robot arm is arranged in the first end position, in at least two calibration positions U, V of the robot arm, one of which can be the first calibration position or both calibration positions can be different from the first calibration position, the calibration element fixed to the robot arm is arranged in the first end position and the calibration element fixed to the robot arm has different orientations relative to the first calibration element in these at least two calibration positions U, V or changes its orientation relative to the first calibration element during this adjustment of the robot arm between the two calibration positions U, V of the robot arm, during the detection, positions of the joints of the robot arm are detected in these at least two calibration positions U, V, and the robot arm is (also) calibrated on the basis of these detected positions of the joints.
- the calibration element fixed to the robot arm when adjusting the robot arm from the or at least one of the second calibration position(s) to the or at least one of the further calibration position(s), in which the calibration element fixed to the robot arm is arranged in the (respective) second end position in which it was arranged in this (respective) second calibration position, in at least two calibration positions LT, V' of the robot arm, one of which can be the (respective) second calibration position or both calibration positions can be different from the (respective) second calibration position, the calibration element fixed to the robot arm is arranged in the (respective) second end position and the calibration element fixed to the robot arm has different orientations relative to the (respective) second calibration element in these at least two calibration positions U', V' or changes its orientation relative to the (respective) second calibration element during this adjustment of the robot arm between the two calibration positions LT, V' of the robot arm, during the detection of positions of the joints of the robot arm in these at least two calibration positions LT, V' are recorded, and the robot
- additional joint positions for calibration can advantageously be approached more easily and/or precisely and/or additional joint positions can be used for calibration, in particular if the robot arm does not have a corresponding zero space in the corresponding initial (calibration) position having.
- the two variants mentioned above can be combined with one another, in particular sequentially, in particular by moving the robot arm after adjusting the robot arm between two calibration positions in which the calibration element fixed to the robot arm has different orientations but the same position relative to the respective calibration element Maintaining the position and orientation is adjusted, and / or after adjusting the robot arm between two calibration positions in which the robot arm-fixed calibration element has the same position and orientation relative to the respective calibration element, the robot arm is then adjusted while maintaining the position and changing the orientation.
- the robot arm is force-controlled in the first calibration position, in a further development when moving from the first calibration position to the further calibration position and/or at least during the detection of the joint positions in the first and/or this further calibration position, such that the calibration element fixed to the robot arm exerts a contact force on the first calibration element and is supported by the first calibration element in the first end position.
- the robot arm is in the or at least one of the second calibration position, in a further development when adjusting the or at least one of the second calibration position(s) into the corresponding further calibration position and/or at least during the detection of the joint positions in the (respective) second and/or this further calibration position, force-controlled in such a way that the robot arm-fixed calibration element in the (respective) second end position exerts a contact force on the respective second calibration element and is supported by the respective second calibration element in the (respective) second end position.
- the robot arm-fixed calibration element can advantageously be secured in its respective end position and thereby in particular the calibration, in particular its precision, and/or the time required can be improved.
- the first calibration element has a guide surface with a cavity, wherein the calibration element fixed to the robot arm can be supported by the cavity in a defined support position which determines the first end position, wherein the guide surface converges towards the cavity, preferably in a funnel-like manner.
- the or one or more of the second calibration element(s) each have a guide surface with a cavity, wherein the calibration element fixed to the robot arm can be supported by the (respective) cavity in a defined support position which determines the (respective) second end position, wherein the guide surface converges towards the cavity, preferably in a funnel-like manner.
- the calibration element fixed to the robot arm has an at least partially spherical or (partially) spherical contact or surface for sliding on the (respective) guide surface.
- the or one or more of the guide surfaces each have one or more guides which are designed to guide the calibration element fixed to the robot arm into the (respective) cavity along (respective) a one-dimensional, preferably at least partially straight, guide path.
- the calibration element fixed to the robot arm has a guide surface with a cavity, wherein the first calibration element can be supported by the cavity in a defined support position which determines the first end position, wherein the guide surface converges towards the cavity, preferably in a funnel-like manner.
- the first calibration element and, in one embodiment, also the or one or more of the second calibration elements each have an at least partially spherical or (partially) spherical contact or surface for sliding on this guide surface.
- the guide surface has one or more guides which are designed to guide the first or (respective) second robot arm-fixed calibration element into the (respective) cavity along (respective) a one-dimensional, preferably at least partially straight, guide path.
- the mechanical or form-fitting guidance or calibration in particular its precision, and/or time and/or space requirements can be improved.
- the method comprises the step:
- the procedure has the following step:
- the or one or more of the guides (each) have at least one edge, preferably a groove, in the guide surface.
- the (respective) guidance provides a defined direction, which can be detected by the at least two calibration positions and thus used advantageously for calibration.
- calibration in particular its precision, and/or time and/or space requirements can be improved.
- a system in particular hardware and/or software, in one embodiment programmatically, is set up to carry out a method described here.
- a system has a measuring device as described here and can in particular consist thereof.
- a or the system has a controller which, in particular in terms of hardware and/or software, in one embodiment is programmatic, for
- Detecting the first positions of the joints of the robot arm in the first calibration position, preferably using appropriate sensors; is set up, can consist in particular of this.
- a system in particular its control, has a calibration means for calibrating of the robot arm based on the detected first joint positions, can in particular consist of this.
- control is, in particular hardware and/or software, in one embodiment programmatic
- control in particular hardware and/or software, in one embodiment programmatically, the control is set up so that
- the calibration element fixed to the robot arm in at least two calibration positions of the robot arm the calibration element fixed to the robot arm is arranged in the first end position and the calibration element fixed to the robot arm has different orientations relative to the first calibration element in these at least two calibration positions, and during the detection, positions of the joints of the robot arm are detected in these at least two calibration positions, and/or the calibration means is set up to calibrate the robot arm on the basis (also) of these detected joint positions.
- control is, in particular hardware and/or software, in one embodiment programmatic
- 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, especially digital, processing unit, especially microprocessor unit (CPU), graphics card (GPU) or the like, and/or one or more programs or program modules, preferably with a memory and/or bus system.
- 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 signals to a data bus.
- a storage system can have one or more, in particular different, storage media, in particular 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 can control and/or calibrate the robot arm. Controlling in the sense of the present invention is also understood to mean in particular regulating or commanding on the basis of a deviation between target and actual values.
- 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 configured to do so.
- one or more, in particular all, steps of the method are completely or partially implemented by computer or one or more, in particular all, steps of the method are carried out completely or partially automatically, in particular by the system or its means.
- the system has the robot arm.
- Calibrating a robot arm can in particular include determining parameters of a, preferably kinematic, model of the robot arm.
- Calibrating a robot arm can in particular include determining transformations between coordinate systems fixed to the robot arm and coordinate systems fixed to the environment.
- a pose of the calibration element fixed to the robot arm can be described on the one hand by a transformation from an environment-fixed coordinate system into a robot arm base-fixed coordinate system, from this - in particular by means of a preferably kinematic model of the robot arm depending on its joint positions - into an end flange-fixed coordinate system and the pose of the calibration element fixed to the robot arm described therein and on the other hand in the environment-fixed coordinate system and the pose of the calibration element fixed to the robot arm described therein in the respective end position.
- the transformation between an environment-fixed coordinate system and a robot arm base-fixed coordinate system (and thus in one embodiment the pose of the robot arm or its base relative to the environment-fixed coordinate system) and/or the transformation between an end flange-fixed coordinate system and an end effector or calibration element-fixed coordinate system can be determined in a manner known per se using corresponding value pairs ⁇ X, qi ⁇ .
- the robot arm is calibrated in one embodiment on the basis of the detected (first, further and/or second) joint positions and the known end position(s) specified and/or measured in one embodiment.
- detection comprises a preferably sensory detection and/or storage of measured values.
- the calibration element fixed to the robot arm exerts a contact force, in a further development a predetermined or target contact force, on the first end position as a result of the force-controlled movement.
- a contact force in a further development a predetermined or target contact force, on the second calibration element.
- this can improve the approach to the end position and thus the calibration, in particular its precision, and/or the time required.
- the corresponding feed direction can advantageously deviate from a direction of gravity, for example the robot arm can also move the calibration element fixed to the robot arm horizontally, overhead or the like, into the respective end position.
- a force-controlled movement can also include an additional position control, in particular a hybrid force-position control.
- a force-controlled movement in a feed direction can include a position-controlled movement in the feed direction and a force-controlled movement, in particular evasion, transversely thereto.
- a force-controlled movement in a feed direction in the sense of the present invention can, in one embodiment, have or include not only a (movement) component in this feed direction but also a (movement) component transverse to the feed direction, which is preferably effected in a form-fitting or mechanical manner by the first or second calibration element contacting the calibration element fixed to the robot arm. Accordingly, in one embodiment, when the calibration element fixed to the robot arm is displaced relative to the first or second calibration element contacting it in a feed direction, the calibration element fixed to the robot arm can, in addition to this displacement, perform a movement transverse to this feed direction relative to the calibration element contacting it, which is effected in a form-fitting or mechanical manner by the contacting or first or second calibration element.
- the force control causes a relative movement transverse to the displacement in this feed direction, in particular mechanically and/or positively, during a (force-controlled) movement of the calibration element fixed to the robot arm relative to the first or second calibration element contacting it in the first or second feed direction, so that the calibration element fixed to the robot arm is guided into the respective end position using or utilizing a single degree of freedom, in particular the degree of freedom in the feed direction.
- Fig. 1 a system according to an embodiment of the present invention
- Fig. 2 a top view of a first calibration element from Fig. 1;
- Fig. 3 a method according to an embodiment of the present invention.
- Fig. 1 shows a system according to an embodiment of the present invention, which has a robot arm 1 with a robot arm base, with respect to which a coordinate system B fixed to the robot arm base is fixed, and an end flange 1.2, with respect to which a coordinate system F fixed to the end flange is fixed, as well as a controller 3 for controlling of the robot arm 1.
- a robot arm-fixed calibration element of a measuring device of the system with a partially spherical surface or contact surface 2 is arranged on the end flange 1.2.
- the measuring device also has a first calibration element 10 with a guide surface 10.1, which is formed by a depression in the form of a pyramid, the edges 11 of which (in the exemplary embodiment, four) form guides for guiding the spherical upper or contact surface of the calibration element 2 fixed to the robot arm along one-dimensional, straight guide paths.
- the tip region of the pyramid-shaped depression, in which the spherical upper or contact surface of the calibration element 2 fixed to the robot arm is finally stopped in a clearly defined first position when inserted into the depression, is indicated in Fig. 1 by cross-hatching for illustration purposes and forms a cavity 12, with the guide surface 10.1 converging in a funnel-like manner towards this cavity 12.
- the measuring device further comprises a second calibration element 20 with a guide surface 20.1, which is formed by a depression in the form of a cone, the tip area of which is analogous to the spherical surface or contact surface of the
- a second calibration element 20 with a guide surface 20.1, which is formed by a depression in the form of a cone, the tip area of which is analogous to the spherical surface or contact surface of the
- the controller 3 first controls it into a position in which the spherical upper or contact surface of the calibration element 2 fixed to the robot arm is roughly at least partially positioned within the recess of the first calibration element 10 (Fig. 3: step S10).
- controller 3 moves the robot arm-fixed calibration element 2 relative to the first calibration element 10 in a first feed direction, which is vertically downward in FIG ).
- the calibration element 2 fixed to the robot arm hits the guide surface 10.1. Then, with further force-controlled retraction into the recess, it is first retracted with the help of the robot arm 1 up to one of the edges 11 and then along this into the cavity 12 and is guided mechanically or positively by the guide surface 10.1 or edge 11.
- the calibration element fixed to the robot arm is stopped in the cavity 12 and has a first end position S30), the calibration element fixed to the robot arm continuing to exert a force-controlled contact force on the guide surface 10.1 in the cavity 12 during this detection.
- the positions q of the joints are recorded at least once when the robot arm 1 moves along the edge 11 in a further calibration position that is passed through during this process.
- the robot arm 1 is adjusted from the first calibration position into at least one further calibration position, wherein the calibration element fixed to the robot arm remains arranged in the first end position or is moved by the force-controlled contact force in cooperation with the Cavity 12 maintains the first end position (Fig. 3: step S40).
- the positions qi 2 of the joints are also recorded in this further calibration position (Fig. 3: step S50), with the calibration element fixed to the robot arm continuing to exert a force-controlled contact force on the guide surface 10.1 in the cavity 12 during this recording.
- the orientation of the calibration element fixed to the robot arm can be changed relative to the first calibration element 10 when adjusting to the further calibration position. Then, in one embodiment, while maintaining the first end position and the orientation of the calibration element fixed to the robot arm relative to the first calibration element, the robot arm 1 can be adjusted to at least one further calibration position and the positions of the joints can also be recorded in this or these further calibration position(s).
- the calibration element fixed to the robot arm can maintain both the first end position and its orientation relative to the first calibration element and, if necessary, the robot arm can then be adjusted to at least one further calibration position while maintaining the first end position of the calibration element fixed to the robot arm and changing its orientation relative to the first calibration element.
- the spherical surface or contact surface of the calibration element 2 fixed to the robot arm is roughly at least partially positioned within the recess of the second calibration element 20 using the robot arm 1 (FIG. 3: step S60).
- the controller 3 moves the calibration element fixed to the robot arm relative to the second calibration element in a second feed direction, which is also vertically downward in Fig. 1, with the aid of the robot arm 1 by moving the robot arm 1 accordingly in a force-controlled manner (Fig. 3: step S70).
- the calibration element fixed to the robot arm hits the guide surface 20.1. Then, with further force-controlled retraction into the recess, it is guided by the robot arm 1 up to the tip area of the conical recess and is mechanically or positively guided by the guide surface 20.1.
- the robot arm 1 is adjusted from the second calibration position into at least one further calibration position, wherein the calibration element fixed to the robot arm continues to be arranged in the second end position or maintains the second end position through the force-controlled contact force in interaction with the cavity 22 (Fig. 3: step S90).
- the positions q 22 of the joints are also recorded in this further calibration position (Fig. 3: step S100), wherein the calibration element fixed to the robot arm continues to exert a force-controlled contact force on the guide surface 20.1 in the cavity 22 during this recording.
- the calibration element fixed to the robot arm can have the same end position and different orientations and/or the same end position and orientation in two or more of the calibration positions.
- a kinematic model of the robot arm 1 can be calibrated by determining, purely as an example, parameters p of the model V so that the sum of the deviation
- an orientation of the robot tool-fixed coordinate system arranged in the first end position is also known and can be advantageously used in the calibration described above.
- a first and a second calibration element were explained, one of which has a guide surface in the form of a pyramid-shaped depression (the edges of which form guides for guiding the calibration element fixed to the robot arm into the cavity 12 along a one-dimensional, straight guide path) and the other, in turn, has a guide surface in the form of a conical depression.
- both calibration elements can each have the pyramid-shaped or conical depression or a different type of depression.
- a shape of a pyramid with four edges instead of a shape of another pyramid, for example with only three edges, can be used.
- one or more further second calibration elements can be provided or used in an analogous manner, as was illustrated purely by way of example with reference to the second guide surface 20.1.
- one or more of the calibration elements can be oriented in a different way to the environment, for example have horizontal or upward feed directions, which can in particular improve the flexibility and/or the space requirement.
- force-controlled movement can also include additional position control, in particular a hybrid force-position control.
- additional position control in particular a hybrid force-position control.
- a delivery movement in the respective delivery direction can take place in a position-controlled manner and the robot arm 1 can move transversely thereto with the robot arm-fixed calibration element 2, i.e. horizontally in the exemplary embodiment, as a result of the guidance by the respective environmentally fixed calibration element.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022210253.3A DE102022210253A1 (de) | 2022-09-28 | 2022-09-28 | Roboterarmkalibrierung |
| PCT/EP2023/074534 WO2024068221A1 (de) | 2022-09-28 | 2023-09-07 | Roboterarmkalibrierung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4594055A1 true EP4594055A1 (de) | 2025-08-06 |
Family
ID=88016389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23768245.5A Pending EP4594055A1 (de) | 2022-09-28 | 2023-09-07 | Roboterarmkalibrierung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4594055A1 (de) |
| CN (1) | CN119907733A (de) |
| DE (1) | DE102022210253A1 (de) |
| WO (1) | WO2024068221A1 (de) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE532610T1 (de) * | 2008-04-30 | 2011-11-15 | Abb Technology Ab | Verfahren und system zur bestimmung der beziehung zwischen einem roboterkoordinatensystem und einem lokalen koordinatensystem, das im arbeitsbereich des roboters positioniert ist |
| JP2011011326A (ja) * | 2009-07-06 | 2011-01-20 | Ihi Corp | ロボットのツール位置較正治具と方法 |
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2022
- 2022-09-28 DE DE102022210253.3A patent/DE102022210253A1/de active Pending
-
2023
- 2023-09-07 CN CN202380067517.XA patent/CN119907733A/zh active Pending
- 2023-09-07 WO PCT/EP2023/074534 patent/WO2024068221A1/de not_active Ceased
- 2023-09-07 EP EP23768245.5A patent/EP4594055A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024068221A1 (de) | 2024-04-04 |
| CN119907733A (zh) | 2025-04-29 |
| DE102022210253A1 (de) | 2024-03-28 |
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