EP2969401A1 - Verfahren und vorrichtung zur online kalibrierung und zum führen eines mehrachsigen gelenkarmroboters - Google Patents
Verfahren und vorrichtung zur online kalibrierung und zum führen eines mehrachsigen gelenkarmrobotersInfo
- Publication number
- EP2969401A1 EP2969401A1 EP14715852.1A EP14715852A EP2969401A1 EP 2969401 A1 EP2969401 A1 EP 2969401A1 EP 14715852 A EP14715852 A EP 14715852A EP 2969401 A1 EP2969401 A1 EP 2969401A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- robot
- correction values
- robot controller
- measuring device
- measuring
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/16—Programme controls
- B25J9/1628—Programme controls characterised by the control loop
- B25J9/1638—Programme controls characterised by the control loop compensation for arm bending/inertia, pay load weight/inertia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/16—Programme controls
- B25J9/1628—Programme controls characterised by the control loop
- B25J9/1641—Programme controls characterised by the control loop compensation for backlash, friction, compliance, elasticity in the joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/16—Programme controls
- B25J9/1679—Programme 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
- G05B2219/36—Nc in input of data, input key till input tape
- G05B2219/36415—Adjust path and attitude tool by detecting path, line with a photosensor, laser
-
- 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
- G05B2219/39024—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
- G05B2219/39056—On line relative position error and orientation error calibration
Definitions
- the invention relates to a method and apparatus for guiding a multi-axis articulated arm robot with the features in the preamble of the process and
- the invention solves this problem with the features in the method and device main claim.
- the claimed method and apparatus are particularly suitable for web processes in which the robot is provided with an end effector, e.g. a tool, a pre-programmed and stored in his robot control track
- web defects can be detected and eliminated online during the robot movement with an external guidance system. This is done on a reference trip with a trial carried out process, with the corrected
- Articulated robot moves off the corrected programmed path without an external guidance system.
- Articulating robot moves the end-effector along a programmed path during homing by a trial-and-error process, carrying a measurement sample from the external guidance system, detecting the position and orientation of the measurement sample from the guidance system with an external measuring device and a guidance computer during robot movement; Orientation and path errors detected and
- Correction values are determined and output to the robot controller, the robot controller corresponding to the programmed path based on the correction values
- the external guidance system and / or the robot controller stores the correction values and wherein in later operation, the thus corrected programmed path is possibly traversed without external guidance system.
- the guide system in said operation is no longer used and possibly dismantled.
- the correction values can then be e.g. stored in the robot controller.
- the management computer of the guidance system continues to be used and, if appropriate, the corrected programmed path travels without the measuring device.
- the measuring device is used, for example, only for homing. It can be shut down or dismantled for said operation.
- the invention therefore relates to a special case
- Precalibration which is tailored to the specific process and to the programmed web movement of the articulated arm robot.
- the correction approach is more comprehensive than in the previously known off-line calibration, in which only occasionally end positions and end poses, but not the path or the path movement between the start and end poses are detected.
- the sample placed at a suitable position and the external acquisition and measurement of the sample can be used online during the robot movement to position,
- Robot controller are output.
- all internal and external influences on the robot arrangement can be detected and corrected.
- the online path correction allows the robot to be provided with a suitable set of correction values, in particular 6DoF correction values, for each interpolation clock of its robot controller.
- 6DoF correction values for each interpolation clock of its robot controller.
- Path correction can also robot poses absolutely accurate be taken.
- a desired robot pose can also be the target of a guided robot movement.
- the measurements and corrections take place during the homing run and a trial run as well as during the robot movement. They take into account the actual conditions, including any temporary influences and / or variable errors, e.g. Temperature drift or the like
- Frames on which the robot is stationary or movable are detected and compensated. If the industrial robot has an additional transport axis, e.g. a linear axis, has, also their remaining residual error can be compensated.
- additional transport axis e.g. a linear axis
- Compensatory is also a remaining residual error in the orientation of the robot on this transport axis.
- the aforementioned error compensations are
- the invention is illustrated by way of example and schematically in the drawing. It shows:
- Figure 1 a schematic side view of a
- Figure 2 a schematic representation of a desired-actual deviation
- FIG. 3 shows a schematic diagram of desired, actual and
- the invention relates to a device with an external guide system (8) for a robot assembly (1).
- the invention further relates to a guiding method.
- FIG 1 shows schematically such a robot assembly (1), which may also be referred to as a robot station.
- the robot assembly (1) is used to carry out
- Processes on workpieces can be handling processes or machining processes, in particular joining processes, application processes or the like.
- a machining process can also be a machining
- a handling process may e.g. the storage of mat-shaped pieces of material made of fiber materials, especially carbon fibers, fiberglass or the like. affect.
- the robot assembly (1) has at least one
- multiaxial programmable industrial robot which has several rotary robot axes and as
- Articulated arm robot (2) is formed. He is referred to in the following abbreviated as robot (2).
- the robot (2) has several articulated with each other
- An end effector (4) is located on the robot hand (3), which may itself be multiaxial. This can e.g. as a tool, in particular as a gripping tool or as
- Machining tool e.g. Joining tool or
- Machining tool can also be used as a cutting tool
- Tool in particular milling tool, drilling tool or the like. Or be designed as a gripping and laying tool.
- the robot (2) may be connected to its base member, e.g. a pedestal to be stationary.
- its base member e.g. a pedestal to be stationary.
- the robot (2) has one or more additional linear and / or translational
- Transport axles (6) In Figure 1, this is e.g. a
- the robot (2) is further connected to a robot controller (5) which controls the robot axes.
- a possibly existing transport axes (6) can also be connected to the robot controller (5) and controlled by this as an additional robot axis. If
- this includes the movements of a possible transport axle.
- a plurality of robots (2) may be present and connected to their own or to a common robot controller.
- the robot (2) can be arranged on a leash. In the illustrated embodiment, it is arranged on a frame (7), which is designed for example as a portal.
- the transport axle (6) can be located on this frame (7).
- the robot is
- Stringers e.g. on a horizontal traverse
- Moving axis (6) moves, deformed the frame (7), which is shown schematically in Figure (1).
- Path commands used e.g. a command "continuous path", which defines the path between the start and end positions or, if necessary, between several intermediate positions.
- the web can be linear. It can also be curved regularly or irregularly. The web can also be composed of a plurality of linear and / or curved track sections.
- An external guidance system (8) is used to improve the positioning and path accuracy of the robot (2)
- the external guidance system (8) can be retrofitted to an existing robot arrangement (1). It can also be used with original equipment along with a
- Robot assembly (1) are manufactured and delivered.
- the external guidance system (8) can be provided and arranged separately next to the robot arrangement (1). Parts of the external guidance system (8), e.g.
- Control components can be integrated in the robot assembly (1), in particular in its robot controller (5).
- the external guidance system (8) is with the Robot controller (5) connectable (retrofit) or already connected (part of the robot assembly).
- the external guidance system (8) has a measuring sample (9), an external measuring device (11) and a
- the measuring sample (9) is for
- the measuring sample (9) may also be attached to the end effector (4), e.g. be located at the tool-center-point (TCP). This is a preferred embodiment.
- TCP tool-center-point
- Arrangement possibility for the measurement sample (9) is provided on an object (15) held by the end effector (4). This can e.g. one from the robot (2) by means of a
- Greiftechnik (4) held and guided workpiece or component This may be e.g. to a component of a vehicle body, a fiber mat or the like.
- the measuring device (11) detects in the process the position and orientation of the test sample (9). This happens
- test sample preferably non-contact and may e.g. done optically.
- Said detection of the position and orientation of the test sample can be multiaxial, with the test sample (9) and the measuring device (11) having a suitably suitable design for this purpose.
- test sample (9) has several corresponding positioned and separated from each other
- the measurement sample can be designed as a so-called multisided sample from a plurality of calibrated individual probes.
- the measuring device (11) has a measuring device (12) and a
- the measuring device (12) detects in a more suitable manner, in particular contactless and preferably optically, the measuring sample (9).
- the measuring device (12) is at a suitable location, preferably stationary, and positioned or positioned with a defined spatial reference. It has e.g. a predetermined position in the basic coordinate system shown in FIGS. 1 and 2. This can e.g. be the robot coordinate system.
- the measuring device (12) can be designed in any suitable manner. It can also be multi-part.
- the meter (12) preferably provides 6D detection. It may be for this purpose e.g. be designed as a laser tracker that emits a laser beam to the test sample (9) and evaluates the reflected laser light from there, e.g. over a running time measurement or
- any 6DoF measuring system can be used for 6DoF correction (and any 3D measuring system for 3D correction).
- the guide system (8) can also have a plurality of measurement samples (9) arranged at different locations.
- the guidance system (8) detects during a reference travel with a trial carried out process and a robot movement along a programmed path via the Meßprobener applied online any position,
- Measurement sample (9).
- FIG. 2 shows such a desired-actual deviation.
- this calculates external guidance system (8) correction values and outputs them to the robot controller (5). This can be determined by the
- 6D correction values are in a so-called.
- the external guidance system (8) cyclically performs a cyclic desired-actual comparison of the recorded
- the actual measurement data are from the
- Measuring device (11) recorded and evaluated and transmitted to a fast management computer (14). This receives from the robot controller (5) the associated target data and calculated at detected deviation
- Robot control (5) applies the correction values obtained in the control of the movements of the robot (2) and possibly the one or more transport axes (6).
- the setpoint values changed during a corrected robot movement must be corrected by the master computer (14) in
- FIG. 3 shows a value curve in the diagram for this purpose. The recorded actual course of the respective
- dot-dash line indicates the setpoint curve and the dashed line indicates the reference.
- the reference reproduces the absolute value profile stored in the path program, the reference value representing the sum of the path program or reference and correction value from the guidance system (8).
- the management computer (14) may be a stand-alone computer, one for the determination and output of the
- the management computer (14) can alternatively in the
- Robot control (5) to be integrated.
- the management computer (14) is connected to the measuring device (12) or its evaluation and control device (13) and to the robot controller (5) in a signal-technically suitable manner, e.g. via wires or wireless, e.g. by radio, infrared or the like. , connected .
- the robot controller (5) processes the transmitted correction values of the guidance system (8) e.g. by means of averaging.
- a filter in particular web filter, can be used.
- the setpoint values determined from the path planning for the axis control are filtered.
- the correction values also flow into these setpoints and are passed through the web filters
- Swinging the robot axes are avoided. Furthermore, by estimating possible subsequent movements of the robot can be corrected in advance.
- the correction of the robot or axis movements effected by the robot controller (5) is carried out over several cycles.
- the correction value calculation can take place at each interpolation cycle of the robot controller (5) or at longer intervals.
- any reference coordinate system can be arranged or
- the measurement sample (9) is located at a TCP of the end effector (4).
- Robot controller (5) can save the online transmitted and processed correction values and thereby the Record value gradients. If these correction value curves are typical for the respective process and are
- Track control can be used.
- the thus corrected programmed path is then possibly without external
- the measuring or observation of the robot (2) and the measuring sample (9) with the measuring device (11) can be any measuring or observation of the robot (2) and the measuring sample (9) with the measuring device (11)
- the referenced robot movement can then be repeatedly executed, wherein the measuring device (11) does not have to have visual contact with the test sample (9) or can not always have visual contact and can also be dispensed with.
- Integrate correction value determination For example, a distance meter can ensure that the robot (2) guided by the external guidance system (8) always has one certain tool-workpiece distance. This can eg by a tool or other
- End effector (4) entrained sensors can be achieved. Furthermore, with such an additional measuring system or a sensor system (16), the forces or moments occurring in the process can be recorded. This is preferred in processes of touch contact between the
- End effector (4) is in this case e.g. as a cutting or forming machining tool or as gripping and
- Such external mechanical stress absorbing sensor (16) can in the end effector (4) or between
- a sensor (16) may be e.g. in or on a spindle, in particular a drilling or milling spindle or a drive or driving spindle, or at another suitable location.
- a tactile robot can be used, which is an integrated for load recording
- the aforementioned load absorption can be carried out in trial operation under actual process conditions and with a real end effector (4). It can also be incorporated into the determination of correction values.
- the real end effector (4) has its nominal geometry and is not worn yet.
- the said load recording can also be carried out and evaluated online in continuous operation. This is also possible with interference-intensive processes in which the external guidance system (8) in the series and
- Production plant is not used or is no longer available. From any detected during continuous operation and possibly signaled load changes can
- Robot control (5) can also be used by the
- correction values to a plausibility check in order to be able to determine any malfunctions. Furthermore, the correction values can be limited, e.g. prevents oversteer.
- Embodiment are possible in various ways.
- the various variants can be combined with their features in particular in any way with each other. Swapping or omitting individual features is also possible.
- TCP Tool Center Point
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Numerical Control (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202013101050.2U DE202013101050U1 (de) | 2013-03-11 | 2013-03-11 | Führungssystem für eine Roboteranordnung |
PCT/EP2014/054562 WO2014139938A1 (de) | 2013-03-11 | 2014-03-10 | Verfahren und vorrichtung zur online kalibrierung und zum führen eines mehrachsigen gelenkarmroboters |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2969401A1 true EP2969401A1 (de) | 2016-01-20 |
Family
ID=50442481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14715852.1A Withdrawn EP2969401A1 (de) | 2013-03-11 | 2014-03-10 | Verfahren und vorrichtung zur online kalibrierung und zum führen eines mehrachsigen gelenkarmroboters |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2969401A1 (de) |
DE (1) | DE202013101050U1 (de) |
WO (1) | WO2014139938A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160214261A1 (en) * | 2015-01-22 | 2016-07-28 | GM Global Technology Operations LLC | Collaborative robot system and method |
US9796086B2 (en) * | 2015-05-01 | 2017-10-24 | Kawasaki Jukogyo Kabushiki Kaisha | Method of teaching robot and robot |
DE102016013891A1 (de) * | 2016-11-21 | 2018-05-24 | Kuka Roboter Gmbh | Vermessen einer Bewegungsachse eines Roboters |
DE102017212860B4 (de) | 2017-07-26 | 2020-07-09 | Premium Aerotec Gmbh | Vorrichtung und Verfahren zur Herstellung eines gekrümmten Faservorformlings aus einem bi- oder multidirektionalen Faserhalbzeug |
CN112188955B (zh) * | 2018-04-18 | 2022-09-23 | 倍耐力轮胎股份公司 | 用于构造生轮胎的方法 |
DE102019102507A1 (de) * | 2019-01-31 | 2020-08-06 | Kuka Industries Gmbh & Co. Kg | Gießeinrichtung und Verfahren |
CN110375688A (zh) * | 2019-06-18 | 2019-10-25 | 宁波敏实汽车零部件技术研发有限公司 | 一种工业机器人工具坐标系姿态标定系统与方法 |
DE102020106998B4 (de) | 2020-03-13 | 2023-05-25 | Gottfried Wilhelm Leibniz Universität Hannover | Verfahren zum Kalibrieren eines Roboters und entsprechender Roboter |
EP4214025A4 (de) * | 2020-09-17 | 2024-06-05 | Abb Schweiz Ag | Verfahren und vorrichtung zur verwaltung eines roboterweges |
DE102020213127B3 (de) | 2020-10-19 | 2022-01-20 | Kuka Deutschland Gmbh | Verfahren und System zum Betreiben eines Roboters |
CN115716175B (zh) * | 2022-12-09 | 2024-08-09 | 郑州煤机数耘智能科技有限公司 | 用于焊接机器人一对多离线编程的设备调试方法 |
CN116038717A (zh) * | 2023-03-31 | 2023-05-02 | 珞石(北京)科技有限公司 | 光伏插片中机械臂快速定位的方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6269284B1 (en) * | 1997-05-09 | 2001-07-31 | Kam C. Lau | Real time machine tool error correction using global differential wet modeling |
DE19947374B4 (de) * | 1999-10-01 | 2005-11-03 | Bundesrepublik Deutschland, vertr. d. d. Bundesministerium für Wirtschaft und Arbeit, dieses vertr. d. d. Präsidenten der Physikalisch-Technischen Bundesanstalt | Verfahren zur Ermittlung geometrischer Abweichungen von Koordinatenmeßgeräten oder Werkzeugmaschinen |
SE0001312D0 (sv) * | 2000-04-10 | 2000-04-10 | Abb Ab | Industrirobot |
DE10150225A1 (de) * | 2001-10-12 | 2003-04-17 | Tecmedic Gmbh | Verfahren zur Verringerung von Fehlern bei der Positionierung eines Roboters gegenüber einem Werkstück |
US6873880B2 (en) | 2001-12-26 | 2005-03-29 | Lockheed Martin Corporation | Machine for performing machining operations on a workpiece and method of controlling same |
US8290618B2 (en) | 2007-03-05 | 2012-10-16 | CNOS Automations Software GmbH | Determining positions |
DE102007017578A1 (de) * | 2007-04-13 | 2008-10-16 | Kuka Roboter Gmbh | Robotersteuerung, Industrieroboter und Verfahren zum Erhalten eines absolutgenauen Modells |
US8082064B2 (en) | 2007-08-24 | 2011-12-20 | Elite Engineering Corporation | Robotic arm and control system |
US8457791B2 (en) * | 2009-03-10 | 2013-06-04 | GM Global Technology Operations LLC | Method for dynamically controlling a robotic arm |
DE102009014766B4 (de) | 2009-03-25 | 2012-02-09 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Überlagerte Achsen bei einer Vorrichtung zur Bearbeitung eines Werkstücks mit einem Werkzeug |
AT508329A1 (de) * | 2009-06-09 | 2010-12-15 | Engl Franz | Verfahren und vorrichtung zur zuführung von vorzugsweise verschiedenartig geformten teilen |
-
2013
- 2013-03-11 DE DE202013101050.2U patent/DE202013101050U1/de not_active Expired - Lifetime
-
2014
- 2014-03-10 WO PCT/EP2014/054562 patent/WO2014139938A1/de active Application Filing
- 2014-03-10 EP EP14715852.1A patent/EP2969401A1/de not_active Withdrawn
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2014139938A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE202013101050U1 (de) | 2014-08-05 |
WO2014139938A1 (de) | 2014-09-18 |
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