WO2018097784A1 - Measurement system and method of an industrial robot - Google Patents
Measurement system and method of an industrial robot Download PDFInfo
- Publication number
- WO2018097784A1 WO2018097784A1 PCT/SE2017/051144 SE2017051144W WO2018097784A1 WO 2018097784 A1 WO2018097784 A1 WO 2018097784A1 SE 2017051144 W SE2017051144 W SE 2017051144W WO 2018097784 A1 WO2018097784 A1 WO 2018097784A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mirror
- camera
- industrial robot
- robot
- measuring system
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/02—Sensing devices
- B25J19/021—Optical sensing devices
- B25J19/023—Optical sensing devices including video camera means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/0084—Programme-controlled manipulators comprising a plurality of manipulators
-
- 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
- B25J9/1694—Programme 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
- G01B11/005—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates coordinate measuring machines
-
- 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
- G05B2219/37—Measurements
-
- 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
-
- 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
- G05B2219/39025—Spheric tool interrupts transmitted calibration beam, in different configurations
Definitions
- the present invention concerns an industrial robot. More precisely the invention concerns a measuring method for determining an object in the working area of the industrial robot.
- industrial robot should be understood a manipulator having a plurality of moveable parts and a control system.
- manipulator or robot The structure of an industrial robot may in the following text be denoted manipulator or robot.
- the robot To operate an industrial robot in an industrial environment the robot must be calibrated in a local coordinate system. This means that the tool center point (TCP) must be exactly known in all positions of the local coordinate system. In many cases the local robot coordinate system must be calibrated to comply with a global coordinate system where a work piece may be located.
- TCP tool center point
- a great many calibration methods are known. Often the robot moves a calibration tool to different positions where it is sensed by a sensing unit in a global coordinate system.
- a sensing unit may for instance comprise a touch sensing unit, crossing laser beams or camera units. It is also known the use of a touchscreen for calibration purposes.
- WO2015165062 a method for calibration of a tool center point of an industrial robot is previously known.
- the method involves a cross beam sensor having a first laser beam and a second laser beam.
- a method for calibrating a robot unit is previously known.
- the object is to provide a method for calibrating a first coordinate system of a root unit with a second coordinate system of an object identification unit.
- the method comprises generating a plurality of target points to which a calibration tool is to be moved by the robot unit for calibration.
- the target points are evaluated by use of a camera unit.
- a primary object of the present invention is to seek ways to improve a measurement system and method of an industrial robot.
- the industrial robot carries a 3D camera and uses a mirror for creating a mirror object of a real object to determine the position of the real object.
- the 3D camera Prior to the measurement the 3D camera is fixed on the robot structure.
- the position and orientation of the 3D camera is thus known in a local coordinate system.
- the local coordinate system is the same as the coordinate system of the industrial robot.
- the mirror is also defined in the local coordinate system and thus measurement on the mirror object may be used to define the real object.
- a 3D camera comprises means for producing a threedimensional image of a real object.
- a 3D camera comprises a stereo camera containing two optical lines each with a lens and an image sensor. With such a stereo camera any object in the robot working area may be determined in space.
- the stereo camera not only determines an object in a plane but also determines the distance to the object.
- a stereo camera fixed to the robot structure has blind sectors where an object cannot be seen. According to the invention the introduction of a mirror into the working area these blind sectors are eliminated by the use of a mirror image.
- the 3D camera comprises processor means and memory means to execute instructions from a computer program. By using a mirror the robot may reflect itself to find out parts that cannot be seen by the camera from its fixed position.
- the robot is controlled to hold the object in front of the mirror.
- the stereo camera defines the plane of the mirror by measuring at least three position marks on the mirror.
- the plane of the mirror is now defined in the local coordinate system.
- the 3D camera calculates by using triangulation the position of the tool tip from the mirror object. By performing measurements of a plurality of points on the object also the orientation of the object may be determined.
- the position and orientation of any object held by the robot may be investigated by the mirror technique.
- a robot carrying a 3D camera can locate an object to be picked, define the position and orientation of the object in its picking tool and place the object in a predetermined position in a known container.
- the mirror comprises a screen or a wall with a known position and orientation.
- the mirror is attached to the manipulator.
- the object is achieved by a measuring system of an industrial robot comprising a plurality of moveable arms including a tool holder and a 3D camera carried by the industrial robot, wherein the measuring system further comprises a mirror for creating a mirror object of a real object, and that the 3D camera is fixed to one of the moveable arms for measurement of the mirror object.
- the mirror comprises at least three position marks to define its plane.
- the 3D camera comprises means for calculation of the position of the real object by triangulation calculation of the mirror object.
- the 3D camera is fixed to the innermost part of the second arm, the industrial robot comprises six moveable arms, and the real object comprises the tool center point (TCP) of the industrial robot.
- the object is achieved by a method for measurement of a real object held by an industrial robot comprising a plurality of moveable arms including a tool holder and a 3D camera carried by the industrial robot, by providing a mirror in the working area of the robot, fixing the 3D camera to one of the moveable arms, moving the industrial robot to create a mirror object of the real object, and calculating the space position of the real object from triangulation of the mirror object.
- the method further comprises measuring the plane of the mirror from at least three position marks on the mirror.
- the method is carried out by execution of a computer program.
- Fig 1 is a three dimensional view of an industrial robot in front of a mirror according the invention.
- Fig 2 is a principal view of a 3D camera and the triangulation
- a system for measuring an object held by the robot according to the invention is shown in Fig 1.
- a 3D camera 1 is fixed on a manipulator 2 of an industrial robot and a mirror 3 is positioned in the working area of the manipulator.
- the manipulator comprises a foot 4 carrying a rotatable arranged stand 5.
- the stand carries a pivotally arranged first arm 6 which carries a pivotally arranged second arm 7.
- the second arm carries a rotatable wrist part 8 and a pivotable hand part 9 which carries a rotatable tool holder 10.
- the tool holder carries a drill apparatus 11 with a drill 12.
- the mirror 3 is located in the working area of the manipulator 2 such that the drill 12 is seen by the 3D camera 1.
- the mirror comprises a plane structure having at least three position marks 13.
- the camera cannot see the drill from its position on the structure of the manipulator.
- the manipulator is moving the drill in front of the mirror such that the drill may be detected by the 3D camera.
- the distance and orientation of the mirror is determined by measuring the three position marks on the mirror.
- the position of the drill is measured and calculated by the 3D camera .
- the method of calculating the position of an object 14 by use of a mirror 3 is shown in Fig 2.
- the position and orientation of the mirror is previously determined by measuring three position marks on the mirror plane.
- the 3D camera comprises two lenses 16 each having a center line 17 between which there is a known distance c.
- An object is projected through the two lenses 16 and detected as an image 18 on an image sensor 19.
- the focal distance f between the lens and the image sensor is known.
- the righthand part of the camera has been given figure designations.
- An optical line from the mirror object 12i is projected through each of the lenses onto each image sensor 19.
- the projection of the mirror object 12i is detected at a distance a from the centerline 17.
- the projection of the mirror image 12i is detected at a distance b from the centerline 17.
- the mirror may have any size but must be plane.
- the mirror may be fixed in the working area of the robot but may also be put in place when needed.
- the determination of the mirror position and orientation may be used for multiple
- a manipulator according to the invention may just comprise a plurality of axes.
- the invention may be used on any manipulator having for instance only two axes or two degrees of freedom.
- Many manipulators used for drilling or picking may have only a few degrees of freedom.
- the 3D camera may be fixed to any of the moveable parts. Considering the size of the camera it should be fixed to the second or third outermost part of the robot in order not to interfere with the tool itself.
- the 3D camera By fixing the 3D camera to the robot structure all object visualized by the camera may be determined in the local coordinate system of the robot. Thus there is no need to orient the robot or its working object in a global coordinate system surrounding the local coordinate system.
- the robot By help of the mirror the robot may visualize parts of a working object not being seen by the camera.
- the camera may by the mirror determine objects like a tool which is located in a blind sector of the camera.
- the mirror technique may be used for calibration of an industrial robot.
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Manipulator (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201780071106.2A CN109983299A (en) | 2016-11-22 | 2017-11-17 | The measuring system and method for industrial robot |
BR112019010204A BR112019010204A2 (en) | 2016-11-22 | 2017-11-17 | system and method of measurement of an industrial robot |
CA3043463A CA3043463A1 (en) | 2016-11-22 | 2017-11-17 | Measurement system and method of an industrial robot |
EP17873113.9A EP3545257A4 (en) | 2016-11-22 | 2017-11-17 | Measurement system and method of an industrial robot |
US16/461,551 US20190291276A1 (en) | 2016-11-22 | 2017-11-17 | Measurement system and method of an industrial robot |
KR1020197016992A KR102228835B1 (en) | 2016-11-22 | 2017-11-17 | Industrial robot measuring system and method |
AU2017366305A AU2017366305A1 (en) | 2016-11-22 | 2017-11-17 | Measurement system and method of an industrial robot |
JP2019524389A JP2020513333A (en) | 2016-11-22 | 2017-11-17 | Industrial robot measurement system and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1630273-9 | 2016-11-22 | ||
SE1630273A SE540459C2 (en) | 2016-11-22 | 2016-11-22 | Measuring system and method of an industrial robot |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018097784A1 true WO2018097784A1 (en) | 2018-05-31 |
Family
ID=62195991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2017/051144 WO2018097784A1 (en) | 2016-11-22 | 2017-11-17 | Measurement system and method of an industrial robot |
Country Status (10)
Country | Link |
---|---|
US (1) | US20190291276A1 (en) |
EP (1) | EP3545257A4 (en) |
JP (1) | JP2020513333A (en) |
KR (1) | KR102228835B1 (en) |
CN (1) | CN109983299A (en) |
AU (1) | AU2017366305A1 (en) |
BR (1) | BR112019010204A2 (en) |
CA (1) | CA3043463A1 (en) |
SE (1) | SE540459C2 (en) |
WO (1) | WO2018097784A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111397581A (en) * | 2020-02-27 | 2020-07-10 | 清华大学 | Visual positioning target and target measuring field based on infrared L ED dot matrix |
CN111823222A (en) * | 2019-04-16 | 2020-10-27 | 华中科技大学无锡研究院 | Monocular camera multi-view visual guidance device and method |
WO2024022565A1 (en) * | 2022-07-28 | 2024-02-01 | 4Tech Ip Aps | Robot calibration system and method for calibrating the position of a robot relative to a workplace |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200070349A1 (en) * | 2018-08-31 | 2020-03-05 | Kawasaki Jukogyo Kabushiki Kaisha | Robot and method of adjusting original position of robot |
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US5096353A (en) * | 1990-07-27 | 1992-03-17 | Motorola, Inc. | Vision system for a robotic station |
US20070247615A1 (en) * | 2006-04-21 | 2007-10-25 | Faro Technologies, Inc. | Camera based six degree-of-freedom target measuring and target tracking device with rotatable mirror |
US20110280472A1 (en) * | 2010-05-14 | 2011-11-17 | Wallack Aaron S | System and method for robust calibration between a machine vision system and a robot |
US20120287239A1 (en) * | 2011-05-10 | 2012-11-15 | Southwest Research Institute | Robot Vision With Three Dimensional Thermal Imaging |
WO2016179448A1 (en) * | 2015-05-06 | 2016-11-10 | Faro Technologies, Inc. | Three-dimensional measuring device removably coupled to robotic arm on motorized mobile platform |
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JP3574044B2 (en) * | 2000-03-23 | 2004-10-06 | 三洋電機株式会社 | Shape measuring device |
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CN101380235B (en) * | 2008-09-24 | 2010-12-01 | 南京航空航天大学 | Test system of animal foot-face contact counter force |
CN101419061B (en) * | 2008-12-08 | 2011-06-29 | 北京航空航天大学 | Mirror image type structure light vision measuring systems and measurement method |
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-
2016
- 2016-11-22 SE SE1630273A patent/SE540459C2/en unknown
-
2017
- 2017-11-17 CN CN201780071106.2A patent/CN109983299A/en active Pending
- 2017-11-17 AU AU2017366305A patent/AU2017366305A1/en not_active Abandoned
- 2017-11-17 WO PCT/SE2017/051144 patent/WO2018097784A1/en unknown
- 2017-11-17 CA CA3043463A patent/CA3043463A1/en not_active Abandoned
- 2017-11-17 JP JP2019524389A patent/JP2020513333A/en active Pending
- 2017-11-17 KR KR1020197016992A patent/KR102228835B1/en active IP Right Grant
- 2017-11-17 EP EP17873113.9A patent/EP3545257A4/en not_active Withdrawn
- 2017-11-17 BR BR112019010204A patent/BR112019010204A2/en not_active Application Discontinuation
- 2017-11-17 US US16/461,551 patent/US20190291276A1/en not_active Abandoned
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US5096353A (en) * | 1990-07-27 | 1992-03-17 | Motorola, Inc. | Vision system for a robotic station |
US20070247615A1 (en) * | 2006-04-21 | 2007-10-25 | Faro Technologies, Inc. | Camera based six degree-of-freedom target measuring and target tracking device with rotatable mirror |
US20110280472A1 (en) * | 2010-05-14 | 2011-11-17 | Wallack Aaron S | System and method for robust calibration between a machine vision system and a robot |
US20120287239A1 (en) * | 2011-05-10 | 2012-11-15 | Southwest Research Institute | Robot Vision With Three Dimensional Thermal Imaging |
WO2016179448A1 (en) * | 2015-05-06 | 2016-11-10 | Faro Technologies, Inc. | Three-dimensional measuring device removably coupled to robotic arm on motorized mobile platform |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111823222A (en) * | 2019-04-16 | 2020-10-27 | 华中科技大学无锡研究院 | Monocular camera multi-view visual guidance device and method |
CN111823222B (en) * | 2019-04-16 | 2021-04-27 | 华中科技大学无锡研究院 | Monocular camera multi-view visual guidance device and method |
CN111397581A (en) * | 2020-02-27 | 2020-07-10 | 清华大学 | Visual positioning target and target measuring field based on infrared L ED dot matrix |
WO2024022565A1 (en) * | 2022-07-28 | 2024-02-01 | 4Tech Ip Aps | Robot calibration system and method for calibrating the position of a robot relative to a workplace |
Also Published As
Publication number | Publication date |
---|---|
KR20190083661A (en) | 2019-07-12 |
JP2020513333A (en) | 2020-05-14 |
CA3043463A1 (en) | 2018-05-31 |
AU2017366305A1 (en) | 2019-06-06 |
EP3545257A4 (en) | 2020-08-12 |
CN109983299A (en) | 2019-07-05 |
BR112019010204A2 (en) | 2019-09-03 |
SE1630273A1 (en) | 2018-05-23 |
SE540459C2 (en) | 2018-09-18 |
US20190291276A1 (en) | 2019-09-26 |
KR102228835B1 (en) | 2021-03-16 |
EP3545257A1 (en) | 2019-10-02 |
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