WO2022224358A1 - ロボット - Google Patents

ロボット Download PDF

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Publication number
WO2022224358A1
WO2022224358A1 PCT/JP2021/016079 JP2021016079W WO2022224358A1 WO 2022224358 A1 WO2022224358 A1 WO 2022224358A1 JP 2021016079 W JP2021016079 W JP 2021016079W WO 2022224358 A1 WO2022224358 A1 WO 2022224358A1
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WO
WIPO (PCT)
Prior art keywords
dimensional sensor
robot
optical system
unit
dimensional
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.)
Ceased
Application number
PCT/JP2021/016079
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
テイテイ 鐘
象太 滝澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Priority to US18/260,742 priority Critical patent/US12233534B2/en
Priority to DE112021006059.7T priority patent/DE112021006059T5/de
Priority to CN202180096955.XA priority patent/CN117177845A/zh
Priority to JP2023515935A priority patent/JPWO2022224358A1/ja
Priority to PCT/JP2021/016079 priority patent/WO2022224358A1/ja
Priority to TW111111924A priority patent/TW202241670A/zh
Publication of WO2022224358A1 publication Critical patent/WO2022224358A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J13/00—Controls for manipulators
    • B25J13/08—Controls for manipulators by means of sensing devices, e.g. viewing or touching devices
    • 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
    • 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
    • B25J19/04—Viewing devices
    • 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
    • B25J9/1674—Program controls characterised by safety, monitoring, diagnostic
    • 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
    • G05B2219/40—Robotics, robotics mapping to robotics vision
    • G05B2219/40584—Camera, non-contact sensor mounted on wrist, indep from gripper
    • 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
    • G05B2219/40—Robotics, robotics mapping to robotics vision
    • G05B2219/40607—Fixed camera to observe workspace, object, workpiece, global

Definitions

  • the present invention relates to robots.
  • a three-dimensional sensor generally comprises multiple two-dimensional cameras.
  • the three-dimensional sensor is used after calibrating the optical system at the factory or at the time of use in order to obtain correct three-dimensional information. Therefore, if the optical system of the 3D sensor changes from the time of calibration due to deterioration over time, vibration, acceleration/deceleration of the robot, or impact beyond expectations, correct 3D information cannot be obtained, accuracy deteriorates, etc. a problem arises.
  • Patent Documents 1 and 2 have proposed technologies for detecting anomalies in three-dimensional sensors.
  • the three-dimensional position measuring device described in Patent Literature 1 judges the deviation of the camera from the parallax calculated by block matching, and performs alarm display and parameter resetting when an abnormality is detected.
  • the information processing apparatus described in Patent Document 2 diagnoses a stereo camera by comparing a plane obtained by solving kinematics with measured three-dimensional information.
  • JP 2017-040549 A Japanese Patent Application Laid-Open No. 2004-306249
  • Patent Documents 1 and 2 mentioned above do not disclose automatic accuracy confirmation and accuracy correction of the three-dimensional sensor. For example, if the distance between the two-dimensional cameras changes, the correct distance cannot be measured. Further, when the relative positions of the two-dimensional cameras are shifted in the direction perpendicular to the inter-camera direction, three-dimensional information cannot be obtained in the first place. Therefore, there is a need for a maintenance function that checks the displacement of the optical system of the three-dimensional sensor at certain intervals and automatically recalibrates if there is an abnormality.
  • a robot provides a three-dimensional sensor that captures an image of an object, and notifies a determination timing for determining deviation of an optical system of the three-dimensional sensor based on a change in a physical quantity related to the three-dimensional sensor. and a determination unit that determines whether or not the optical system of the three-dimensional sensor is misaligned. the number of times of imaging by the three-dimensional sensor, the number of times of acceleration and acceleration/deceleration applied to the three-dimensional sensor, the temperature change of the three-dimensional sensor within a certain period, the temperature change of the three-dimensional sensor during the total operation period, and the At least one of the number of temperature changes within the total operating period of the three-dimensional sensor.
  • FIG. 4 is a flow chart showing processing of the robot according to the embodiment
  • FIGS. 1A and 1B are diagrams showing the configuration of the robot 1 according to this embodiment.
  • the robot 1 includes a robot control device 11, a three-dimensional sensor 12, a robot mechanism 13, and a teaching operation panel .
  • the robot control device 11 is connected to the robot mechanism 13 via a cable 15, and is also connected to the teaching operation panel 14 by wire or wireless communication.
  • the robot control device 11 controls the operation of the robot 1 as a whole.
  • the three-dimensional sensor 12 is connected to the robot control device 11 by wire or wireless communication.
  • the three-dimensional sensor 12 has an imaging device such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor.
  • the three-dimensional sensor 12 may include a projector and detect the three-dimensional shape of the imaging target by ToF (Time Of Flight).
  • ToF Time Of Flight
  • the three-dimensional sensor 12 may detect the three-dimensional shape of the object to be imaged by using two imaging elements and using these parallaxes. In this way, the 3D sensor 12 generates a 3D image showing the 3D shape of the object to be imaged, and acquires 3D information.
  • the three-dimensional sensor 12 includes a temperature sensor, a thermometer, or the like, and can measure the internal temperature.
  • the robot mechanism 13 has a main body, a multi-joint arm, a hand, etc., and performs processing, gripping, transporting, etc. of the workpiece according to the control of the robot control device 11.
  • the teaching operation panel 14 is connected to the robot control device 11 and used by the operator to operate the robot 1.
  • the teaching operation panel 14 includes, for example, an input unit composed of keys for teaching the robot 1 an action, and a display unit for displaying commands of the action to be taught, an image captured by the three-dimensional sensor 12, and the like. And prepare.
  • the three-dimensional sensor 12 may be mounted on the tip portion of the robot mechanism 13.
  • the three-dimensional sensor 12 captures an image of the dot pattern of the dot pattern jig 16 placed on the pedestal 17 to acquire three-dimensional information.
  • the robot control device 11 measures the displacement of the optical system using the acquired three-dimensional information, and corrects (calibrates) the optical system using the measured displacement of the optical system.
  • the three-dimensional sensor 12 may also be fixed to a support 18, as shown in FIG. 1B.
  • the dot pattern jig 16 is gripped by the robot mechanism 13 .
  • the three-dimensional sensor 12 captures an image of the dot pattern of the dot pattern jig 16 gripped by the robot mechanism 13 to acquire three-dimensional information.
  • the robot control device 11 measures the displacement of the optical system using the acquired three-dimensional information, and corrects (calibrates) the optical system using the measured displacement of the optical system.
  • FIG. 2 is a block diagram showing the functional configuration of the robot 1 according to this embodiment.
  • the robot 1 includes a robot control device 11, a three-dimensional sensor 12, a robot mechanism 13, and a teaching operation panel .
  • the robot control device 11 includes a condition setting section 111 , a notification section 112 , a determination section 113 , a measurement section 114 , a correction section 115 and a selection section 116 .
  • the condition setting unit 111 presets the determination conditions for determining the deviation of the optical system of the three-dimensional sensor 12 .
  • the determination condition includes the number of changes in the physical quantity relating to the three-dimensional sensor 12, which will be described later.
  • the determination conditions are the number of operations of the robot 1, the number of times the robot 1 picks up an object, the number of times the three-dimensional sensor 12 picks up images, the number of accelerations and accelerations/decelerations applied to the three-dimensional sensor 12, and the number of times the three-dimensional sensor 12 , the degree of temperature change within the total operating period of the three-dimensional sensor 12, the number of temperature changes within the total operating period of the three-dimensional sensor 12, and the like.
  • the notification unit 112 notifies the determination unit 113 of the determination timing for determining the deviation of the optical system of the three-dimensional sensor 12 based on the variation of the physical quantity of the three-dimensional sensor 12 .
  • the notification unit 112 determines the determination timing for determining the displacement of the optical system of the three-dimensional sensor 12 when the fluctuation of the physical quantity related to the three-dimensional sensor 12 satisfies a preset determination condition. to notify.
  • the fluctuations in the physical quantity related to the three-dimensional sensor 12 are the number of operations of the robot 1, the number of times the robot 1 picks up an object, the number of times the three-dimensional sensor 12 picks up images, the number of accelerations and accelerations/decelerations applied to the three-dimensional sensor 12, 3 It includes at least one of a temperature change within a certain period of the dimensional sensor 12 , a temperature change within the total operating period of the three-dimensional sensor 12 , and a number of temperature changes within the total operating period of the three-dimensional sensor 12 .
  • the optical system of the three-dimensional sensor 12 is susceptible to changes in temperature, fluctuations in the physical quantity of the three-dimensional sensor 12 are affected by changes in the temperature of the three-dimensional sensor 12 within a certain period of time, and the total operating period of the three-dimensional sensor 12 and the number of temperature changes within the total operating period of the three-dimensional sensor 12.
  • the temperature change of the three-dimensional sensor 12 within a certain period may be, for example, the temperature change of the three-dimensional sensor 12 within 24 hours.
  • the temperature change during the total operating period of the three-dimensional sensor 12 for example, the total operating period is one year, and the temperature may change within the range of 1 to 40.degree.
  • the number of temperature changes may be, for example, a predetermined number of temperature changes of 10° C. or more when the three-dimensional sensor 12 is powered on once.
  • the determination unit 113 determines whether or not the optical system of the three-dimensional sensor 12 is misaligned.
  • the determination unit 113 determines whether or not the optical system of the three-dimensional sensor 12 is misaligned, using the number of three-dimensional points of the object or the measured distance of the object as an evaluation index. More specifically, when the notification unit 112 notifies the determination unit 113 of the determination timing, the determination unit 113 detects an object having a known shape such as the dot pattern jig 16 or the like or an object having a known distance. Dimensional information is acquired by the three-dimensional sensor 12 .
  • the 3D sensor 12 is degraded, and it is determined that the optical system of the three-dimensional sensor 12 is misaligned.
  • the three-dimensional sensor 12 has two imaging elements (two-dimensional cameras)
  • the positional relationship between the two two-dimensional cameras changes from the time of adjustment, the correct distance cannot be measured.
  • the three-dimensional sensor 12 measures the correct distance. become unable.
  • the three-dimensional sensor 12 may not be able to acquire three-dimensional information including the distance.
  • the robot 1 measures and corrects the displacement of the optical system by means of the measurement unit 114 and the correction unit 115 .
  • the measuring unit 114 executes the adjustment program and measures the misalignment of the optical system.
  • the correction unit 115 corrects the optical system using the measured deviation of the optical system. Specifically, the correction unit 115 can obtain correct three-dimensional information by correcting the image captured by the three-dimensional sensor 12 using software based on the measured deviation of the optical system.
  • the robot 1 may selectively determine whether or not to perform the determination by the determination unit 113 .
  • the notification unit 112 notifies not only the determination unit 113 but also the selection unit 116 of the determination timing.
  • the selection unit 116 selects whether or not the determination unit 113 performs determination.
  • the selection unit 116 selects whether or not the determination unit 113 performs determination according to the operation of the teaching operation panel 14 by the operator.
  • the robot 1 can arbitrarily select determination of deviation of the optical system of the three-dimensional sensor 12 . For example, even if the determination timing is notified, if the operator determines that there is no need to determine the deviation of the optical system of the three-dimensional sensor 12, the selection unit 116 determines the deviation of the optical system of the three-dimensional sensor 12. can be avoided.
  • FIG. 3 is a flow chart showing the flow of processing of the robot 1 according to this embodiment.
  • the condition setting unit 111 sets a determination condition for determining deviation of the optical system of the three-dimensional sensor 12 .
  • step S2 the notification unit 112 determines whether or not the change in the physical quantity regarding the three-dimensional sensor 12 satisfies a preset determination condition. If the determination condition is satisfied (YES), the process proceeds to step S3. On the other hand, if the determination condition is not satisfied (NO), the process moves to step S2 again.
  • step S ⁇ b>3 the notification unit 112 notifies the determination unit 113 of the determination timing for determining the deviation of the optical system of the three-dimensional sensor 12 .
  • step S ⁇ b>4 when the determination timing is notified from the notification unit 112 , the determination unit 113 determines whether or not the optical system of the three-dimensional sensor 12 is misaligned.
  • step S5 If it is determined in step S5 that the accuracy of the three-dimensional sensor 12 has deteriorated and the optical system of the three-dimensional sensor 12 has deviated (YES), the process proceeds to step S6. On the other hand, if it is determined that the optical system of the three-dimensional sensor 12 has not shifted (NO), the process proceeds to step S2.
  • step S6 the measurement unit 114 executes the adjustment program and measures the displacement of the optical system of the three-dimensional sensor 12.
  • step S7 if the correction unit 115 can correct the deviation measured in step S6 (YES), the process proceeds to step S8. On the other hand, if the amount of deviation of the optical system of the three-dimensional sensor 12 is too large and the correction unit 115 cannot correct the measured deviation (NO), the process proceeds to step S9.
  • step S8 the correction unit 115 corrects the optical system using the measured deviation of the optical system.
  • step S9 if the correction unit 115 fails to correct the deviation of the optical system of the three-dimensional sensor 12, the robot control device 11 notifies the teaching operation panel 14 of an error message, and the display unit of the teaching operation panel 14 Display an error message.
  • the robot 1 uses the three-dimensional sensor 12 that captures an image of an object, and the determination timing for determining the deviation of the optical system of the three-dimensional sensor 12 based on the variation of the physical quantity of the three-dimensional sensor 12. and a determination unit 113 that determines whether or not the optical system of the three-dimensional sensor 12 has deviated. , the number of times of imaging by the three-dimensional sensor 12, the number of times of acceleration and acceleration/deceleration applied to the three-dimensional sensor 12, the temperature change in the three-dimensional sensor 12 within a certain period, the temperature change in the total operation period of the three-dimensional sensor 12, and at least one of the number of temperature changes within the total operating period of the three-dimensional sensor 12 .
  • the robot 1 notifies the timing for judging the deviation of the optical system of the three-dimensional sensor 12 and checks the deviation of the three-dimensional sensor 12, thereby preventing the robot 1 from stopping due to the deterioration of the accuracy of the three-dimensional sensor 12. can do. Further, when the optical system of the three-dimensional sensor 12 needs to be corrected, the robot 1 automatically measures the deviation of the optical system, and automatically corrects the optical system of the three-dimensional sensor 12 based on the deviation. , the maintenance of the three-dimensional sensor 12 can be facilitated.
  • the variation of the physical quantity is at least one of a temperature change within a certain period of the three-dimensional sensor 12, a temperature change within the total operating period of the three-dimensional sensor 12, and the number of temperature changes within the total operating period of the three-dimensional sensor 12. including.
  • the robot 1 can notify the determination timing for determining the displacement of the optical system of the three-dimensional sensor 12 based on the variation of the physical quantity that is susceptible to the accuracy of the three-dimensional sensor 12 .
  • the notification unit 112 notifies the determination unit 113 of the determination timing when a preset determination condition is satisfied.
  • the robot 1 can determine the deviation of the optical system of the three-dimensional sensor 12 at appropriate timing.
  • the determining unit 113 determines whether or not there is a deviation in the optical system, using the number of three-dimensional points of the object or the measured distance of the object as an evaluation index. Thereby, the robot 1 can determine whether or not the optical system of the three-dimensional sensor 12 is misaligned using an appropriate evaluation index.
  • the robot 1 further includes a condition setting section 111 for setting determination conditions. Thereby, the robot 1 can appropriately set the determination condition for determining the variation of the physical quantity regarding the three-dimensional sensor 12 .
  • the robot 1 further includes a selection unit 116 that selects whether or not the determination unit 113 performs determination when the determination timing is notified. As a result, the robot 1 can arbitrarily select determination of deviation of the optical system of the three-dimensional sensor 12 .
  • the robot 1 further includes a measurement unit 114 that measures the deviation of the optical system, and a correction unit 115 that corrects the optical system using the measured deviation of the optical system.
  • a measurement unit 114 that measures the deviation of the optical system
  • a correction unit 115 that corrects the optical system using the measured deviation of the optical system.
  • the above robot 1 can be realized by hardware, software, or a combination thereof. Also, the control method performed by the robot 1 described above can be realized by hardware, software, or a combination thereof.
  • “implemented by software” means implemented by a computer reading and executing a program.
  • Non-transitory computer-readable media include various types of tangible storage media.
  • Examples of non-transitory computer-readable media include magnetic recording media (e.g., hard disk drives), magneto-optical recording media (e.g., magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R/ W, semiconductor memory (eg, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)).

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  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Manipulator (AREA)
PCT/JP2021/016079 2021-04-20 2021-04-20 ロボット Ceased WO2022224358A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US18/260,742 US12233534B2 (en) 2021-04-20 2021-04-20 Robot
DE112021006059.7T DE112021006059T5 (de) 2021-04-20 2021-04-20 Roboter
CN202180096955.XA CN117177845A (zh) 2021-04-20 2021-04-20 机器人
JP2023515935A JPWO2022224358A1 (https=) 2021-04-20 2021-04-20
PCT/JP2021/016079 WO2022224358A1 (ja) 2021-04-20 2021-04-20 ロボット
TW111111924A TW202241670A (zh) 2021-04-20 2022-03-29 機器人

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/016079 WO2022224358A1 (ja) 2021-04-20 2021-04-20 ロボット

Publications (1)

Publication Number Publication Date
WO2022224358A1 true WO2022224358A1 (ja) 2022-10-27

Family

ID=83722082

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/016079 Ceased WO2022224358A1 (ja) 2021-04-20 2021-04-20 ロボット

Country Status (6)

Country Link
US (1) US12233534B2 (https=)
JP (1) JPWO2022224358A1 (https=)
CN (1) CN117177845A (https=)
DE (1) DE112021006059T5 (https=)
TW (1) TW202241670A (https=)
WO (1) WO2022224358A1 (https=)

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JP2005334998A (ja) * 2004-05-25 2005-12-08 Fuji Photo Film Co Ltd 自走式ロボットハンド、および、そのカメラ調整方法、ハンド移動量補正方法、ハンド調整方法
JP2006035384A (ja) * 2004-07-28 2006-02-09 Fanuc Ltd ロボットシステムにおける３次元視覚センサの再校正方法及び装置
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Publication number Priority date Publication date Assignee Title
JP2004306249A (ja) * 2003-03-26 2004-11-04 Sony Corp ロボットに搭載されたステレオ・カメラの診断用装置、並びにロボット装置に搭載されたステレオ・カメラの診断方法
JP2005334998A (ja) * 2004-05-25 2005-12-08 Fuji Photo Film Co Ltd 自走式ロボットハンド、および、そのカメラ調整方法、ハンド移動量補正方法、ハンド調整方法
JP2006035384A (ja) * 2004-07-28 2006-02-09 Fanuc Ltd ロボットシステムにおける３次元視覚センサの再校正方法及び装置
JP2015042437A (ja) * 2013-07-22 2015-03-05 キヤノン株式会社 ロボットシステム及びロボットシステムの校正方法
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
JP2017042895A (ja) * 2015-08-28 2017-03-02 トヨタ自動車株式会社 移動ロボット、及びその校正方法
JP2020172015A (ja) * 2019-04-12 2020-10-22 株式会社Ｍｕｊｉｎ ロボット制御のためのカメラキャリブレーションを更新する方法及び制御システム
JP6803633B1 (ja) * 2019-10-18 2020-12-23 株式会社Ｍｕｊｉｎ ロボット制御のためのキャリブレーション情報を検証及び更新するための方法並びに制御システム

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Publication number Publication date
DE112021006059T5 (de) 2023-12-07
CN117177845A (zh) 2023-12-05
TW202241670A (zh) 2022-11-01
US12233534B2 (en) 2025-02-25
US20240058969A1 (en) 2024-02-22
JPWO2022224358A1 (https=) 2022-10-27

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