WO2022158790A1 - 개선된 암 구조를 구비하는 협동 로봇 및 그 제어방법 - Google Patents
개선된 암 구조를 구비하는 협동 로봇 및 그 제어방법 Download PDFInfo
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- WO2022158790A1 WO2022158790A1 PCT/KR2022/000642 KR2022000642W WO2022158790A1 WO 2022158790 A1 WO2022158790 A1 WO 2022158790A1 KR 2022000642 W KR2022000642 W KR 2022000642W WO 2022158790 A1 WO2022158790 A1 WO 2022158790A1
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- Prior art keywords
- load
- plate
- cooperative robot
- arm
- disposed
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 36
- 230000033001 locomotion Effects 0.000 claims description 6
- 241000282412 Homo Species 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J11/00—Manipulators not otherwise provided for
-
- 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
- B25J9/1633—Programme controls characterised by the control loop compliant, force, torque control, e.g. combined with position control
-
- 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
- B25J13/085—Force or torque sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J18/00—Arms
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/0009—Constructional details, e.g. manipulator supports, bases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/1005—Programme-controlled manipulators characterised by positioning means for manipulator elements comprising adjusting means
-
- 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
- B25J9/1612—Programme controls characterised by the hand, wrist, grip control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—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
- B25J9/1674—Programme 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
- G05B2219/40201—Detect contact, collision with human
-
- 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
- G05B2219/40202—Human robot coexistence
-
- 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
- G05B2219/40317—For collision avoidance and detection
Definitions
- the present invention relates to a cooperative robot and a method for controlling the same, and more particularly, a cooperative having an improved arm structure capable of measuring the load of an object in real time to change the payload and accurately measuring the load to be measured
- the invention relates to a robot and its control method.
- a collaborative robot or cobot is a robot that interacts and collaborates with humans.
- Collaborative robots are common with conventional industrial robots in that they replace humans, but conventional industrial robots perform tasks in places isolated from human contact, whereas collaborative robots perform tasks indoors or in places close to humans.
- the collaborative robot includes a function that detects an external collision and stops its operation during operation to avoid damaging external objects or injuring the human body.
- collaborative robots include a collision mitigation function to minimize damage to an object or operator upon detection of a collision.
- a payload (allowable load) is set for each cooperative robot in consideration of the work place or characteristics, and the operation of the cooperative robot that detects a collision is affected by the set payload.
- the payload of the cooperative robot is set incorrectly, the following problems may occur.
- the co-robot may stop unnecessarily by recognizing the acceleration generated when the co-robot moves at high speed or the load difference generated when the co-robot picks up an object as a collision situation. .
- Collaborative robots will also be subjected to loads and torques in various sizes and directions while working. Accordingly, even when the cooperative robot attempts to measure only the load applied in a specific direction, it may not be able to accurately measure the load and torque applied in the other direction.
- a load cell which is often used to measure a load in a collaborative robot, has a high risk of damage when a load is applied in a vertical or rotational direction other than the specified vertical direction.
- An object of the present invention is to provide a cooperative robot having an improved arm structure capable of measuring the weight of an object in real time and reflecting it in the cooperative robot to improve stability and a method for controlling the same. do it with
- a cooperative robot is a cooperative robot including a driving unit, an arm unit, and a control unit, wherein the arm unit is disposed on a first plate and one surface of the first plate, and a connector connecting the cooperative robot and the arm unit , a second plate disposed spaced apart in a first direction so that one surface faces the other surface of the first plate, the other surface of the first plate and one surface of the second plate are disposed to contact, and applied in the first direction and a load cell that measures and transmits a load to the control unit, at least one or more load cells disposed between the first plate and the second plate, a support shaft extending in the first direction, and a grip for gripping the object.
- one end of the support shaft may be fixed to the first plate, and the other end may be inserted so as to be movable on one side of the second plate.
- the second plate has a connection hole into which the other end of the support shaft is inserted, and is disposed in the connection hole so as to surround the other end of the support shaft, the support It may further include a linear guide constraining the movement direction of the shaft in the first direction.
- a damper disposed at the other end of the support shaft may further include a damper for restricting a movement distance of the support shaft in the first direction.
- the control unit when the load of the object received from the load cell is less than or equal to a preset payload, the control unit may change the payload to the load.
- a method of controlling a cooperative robot is a method of controlling a cooperative robot including a driving unit, an arm unit, and a control unit.
- the cooperative robot detects an object, and the control unit controls the driving unit to control the arm unit. gripping the object with a method, the load cell included in the arm portion measuring the load of the object, the control unit determining whether the load of the object exceeds a preset payload, the load of the object is When the payload is less than or equal to the set payload, the step of the controller changing the payload to the load of the object, and when the load of the object exceeds the preset payload, the controller releases the grip of the arm that grips the object including the steps of
- the cooperative robot and the control method of the cooperative robot according to an embodiment of the present invention may cause the support shaft of the arm to move in a preset direction in the direction of the load to be measured. Accordingly, the cooperative robot and the control method of the cooperative robot according to an embodiment of the present invention can accurately measure the load applied in the direction to be measured even if the load and torque are applied in various directions.
- the cooperative robot and the control method of the cooperative robot according to an embodiment of the present invention can secure the operation stability of the cooperative robot by resetting the payload of the cooperative robot.
- FIG. 1 schematically shows the configuration of a cooperative robot according to an embodiment of the present invention.
- Figure 2 schematically shows the configuration of the arm according to an embodiment of the present invention.
- FIG 3 shows an arm part according to an embodiment of the present invention.
- FIG. 4 is an exploded perspective view of an arm according to an embodiment of the present invention.
- FIG. 5 shows a control method of a cooperative robot according to an embodiment of the present invention.
- a cooperative robot is a cooperative robot including a driving unit, an arm unit, and a control unit, wherein the arm unit is disposed on a first plate and one surface of the first plate, and a connector connecting the cooperative robot and the arm unit , a second plate disposed spaced apart in a first direction so that one surface faces the other surface of the first plate, the other surface of the first plate and one surface of the second plate are disposed to contact, and applied in the first direction and a load cell that measures and transmits a load to the control unit, at least one or more load cells disposed between the first plate and the second plate, a support shaft extending in the first direction, and a grip for gripping the object.
- the x-axis, the y-axis, and the z-axis are not limited to three axes on the Cartesian coordinate system, and may be interpreted in a broad sense including them.
- the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.
- a specific process sequence may be performed different from the described sequence.
- two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the order described.
- FIG. 1 schematically shows the configuration of a cooperative robot 10 according to an embodiment of the present invention
- FIG. 2 schematically shows the configuration of an arm unit 100 according to an embodiment of the present invention
- FIG. 3 is the present invention of the arm part 100 according to an embodiment
- FIG. 4 is an exploded perspective view of the arm part 100 according to an embodiment of the present invention.
- the cooperative robot 10 is an industrial robot that satisfies the cooperative operating conditions for working in the same space as the user.
- the cooperative robot 10 according to an embodiment of the present invention holds an object and moves it to a specific location, assembles, loads, and packs parts, inspects the assembled article, inserts a workpiece and takes out a finished product, machine tending A (machine tending) operation or a polishing operation may be performed.
- the cooperative robot 10 includes an arm unit 100 , a driving unit 200 , a control unit 300 , and a sensor unit 400 .
- the arm unit 100 may be disposed on one side of the cooperative robot 10 to directly grip the object.
- the number or shape of the arm part 100 is not particularly limited and may be appropriately selected according to the work performed by the cooperative robot 10 .
- the arm unit 100 includes a first plate 110 , a connector 120 , a second plate 130 , a load cell 140 , a support shaft 150 , a grip 160 , a damper 170 and a linear A guide 180 may be included.
- the arm unit 100 may further include a housing or a case in which other components are disposed in the internal space to protect them from external impact.
- the first plate 110 is disposed on one side of the arm part 100 , supports the other members of the arm part 100 and connects them to each other.
- a connector 120 to be described later may be disposed on one surface of the first plate 110
- a load cell 140 to be described later may be disposed on the other surface thereof.
- the shape of the first plate 110 is not particularly limited.
- the first plate 110 may be a triangular plate in which one surface and the other surface are flat and rounded corners are chamfered.
- the first plate 110 may include a first connection hole 111 .
- a first connection hole 111 may be formed on the first plate 110 .
- a support shaft 150 to be described later may be disposed in the first connection hole 111 .
- the first connection holes 111 may be respectively disposed at corners of the first plate 110 .
- the connector 120 is disposed on one surface of the first plate 110 , and is a part to which the arm part 100 is coupled to the cooperative robot 10 .
- the connector 120 is connected to the driving unit 200 to be described later, and as the driving unit 200 operates, the female unit 100 connected through the connector 120 may operate.
- the second plate 130 is disposed on the other side of the arm part 100 , supports the other members of the arm part 100 and connects them to each other.
- the second plate 130 may be disposed to be spaced apart from each other in the first direction (eg, the Z-axis direction of FIG. 3 ) such that one surface faces the other surface of the first plate 110 .
- a load cell 140 to be described later may be disposed on one surface of the second plate 130 , and a grip 160 to be described later may be connected to the other surface thereof.
- the shape of the second plate 130 is not particularly limited.
- the second plate 130 may have a shape corresponding to the first plate 110 .
- the second plate 130 may be a triangular plate in which one surface and the other surface are flat and rounded corners are chamfered.
- the second plate 130 may include a second connection hole 131 .
- at least one second connection hole 131 may be formed on the second plate 130 .
- a support shaft 150 to be described later may be inserted into the second connection hole 131 .
- the second connection holes 131 may be respectively disposed on the edge portions of the second plate 130 .
- the second connection hole 131 may be disposed to correspond to the first connection hole 111 of the first plate 110 .
- the second connection hole 131 may be disposed at an intermediate position of two adjacent corners of the second plate 130 . That is, when viewed in a plan view, the first plate 110 and the second plate 130 may be disposed on the same axis, but may be disposed so that the corner portions are staggered from each other.
- the second plate 130 may include a third connection hole 132 .
- at least one third connection hole 132 may be formed at the corner of the second plate 130 as shown in FIG. 3 .
- a grip 160 or a connection portion thereof, which will be described later, may be disposed in the third connection hole 132 .
- the load cell 140 is disposed between the first plate 110 and the second plate 130 , and may measure a load applied during operation of the cooperative robot 10 .
- the load cell 140 is disposed to contact the other surface of the first plate 110 and one surface of the second plate 130 , and can measure a load applied in the first direction.
- the load cell 140 may transmit the measured load to the control unit 300 .
- the support shaft 150 is a member constraining the direction of the load applied to the load cell 140 , and at least one support shaft 150 may be disposed between the first plate 110 and the second plate 130 .
- the cooperative robot performs various motions while holding the object, and in the process receives loads and torques of various magnitudes and directions. Due to this, the load or torque applied in different directions may make it impossible to accurately measure the load, for example, the load received when the collaborative robot grips the object is offset.
- the cooperative robot 10 disposes the support shaft 150 in the first direction between the first plate 110 and the second plate 130 on which the load cell 140 is disposed,
- the direction of the load applied during the operation of the cooperative robot 10 may be constrained in the first direction.
- the support shaft 150 may be a rod-shaped member extending in the first direction, and one end may be connected to the first plate 110 and the other end may be connected to the second plate 130 .
- one end is inserted into the first connection hole 111 of the first plate 110 , and a fixed state may be maintained.
- the other end may be inserted into the second connection hole 131 of the second plate 130 to be movable in the first direction.
- the first plate 110 is configured to be movable relative to the second plate 130 , and the load cell 140 disposed therebetween can measure the load.
- the load cell 140 can accurately measure the load applied in the first direction.
- the number of support shafts 150 is not particularly limited, and it is sufficient if the balance can be maintained in a state disposed between the first plate 110 and the second plate 130 .
- three support shafts 150 may be disposed at each corner of the first plate 110 .
- the linear guide 180 for constraining the movement direction of the support shaft 150 in the first direction may be further included.
- the linear guide 180 is a member of the cylindrical shape in which the support shaft 150 extends in the first direction, and the second end of the support shaft 150 is wrapped around the second end. It may be disposed inside the second connection hole 131 of the plate 130 .
- the number of the linear guides 180 is not particularly limited and may be disposed on each support shaft 150 .
- the linear guide 180 may be fixed inside the second connection hole 131 of the second plate 130 . Accordingly, the support shaft 150 may move relative to the fixed linear guide 180 in the first direction.
- the grip 160 may be disposed on one side of the arm 100 to directly grip the object. Although not shown in FIGS. 3 and 4 , the grip 160 may be disposed on the other surface of the second plate 130 .
- the shape of the grip 160 is not particularly limited, and a forceps or finger type or a suction hole may be used.
- the damper 170 prevents the support shaft 150 from moving excessively when the cooperative robot 10 receives a load in the first direction, and a large instantaneous load is applied to the load cell 140 or the support shaft 150 and is damaged. prevent it from becoming
- the damper 170 is disposed at the other end of the support shaft 150 , and may act as a buffer in the opposite direction when the support shaft 150 moves downward.
- the damper 170 may include an elastic member 171 and a stopper 172 .
- the elastic member 171 is a ring-shaped member and may be disposed to surround the outer circumferential surface of the other end of the support shaft 150 .
- one surface of the elastic member 171 may be disposed to contact the linear guide 180 .
- the type of the elastic member 171 is not particularly limited, and when the support shaft 150 is compressed as it moves downward, it is sufficient if it can provide a restoring force in the opposite direction.
- the elastic member 171 may be a urethane damper or a spring damper.
- the stopper 172 may be disposed at the other end of the support shaft 150 such that the linear guide 180 and the elastic member 171 are positioned therebetween. One surface of the stopper 172 may be in contact with the elastic member 171 . Accordingly, when the support shaft 150 moves downward, the elastic member 171 is compressed between the stopper 172 and the support shaft 150 does not excessively move downward by the restoring force of the elastic member 171 . can
- the shape of the stopper 172 is not particularly limited, and may be a disk shape in contact with the other end of the support shaft 150 .
- the stopper 172 may have a larger outer diameter than the elastic member 171 .
- the driving unit 200 may be controlled by the control unit 300 to drive the cooperative robot 10 .
- the driving unit 200 may grip the object or release the grip by driving the arm unit 100 .
- the driving unit 200 may move the cooperative robot 10 to a work place.
- the type and operation method of the driving unit 200 are not particularly limited.
- the driving unit 200 may include a motor provided on one side of the cooperative robot 10 and a wheel or slider connected thereto.
- the control unit 300 controls the arm unit 100 and the driving unit 200 to perform the operation of the cooperative robot 10 .
- the controller 300 may control the cooperative robot 10 through a preset program or may control the cooperative robot 10 by receiving an instruction input from the outside.
- the controller 300 may control the driving unit 200 to move the cooperative robot 10 to the object. And the controller 300 may set the zero point of the load cell 140 .
- the control unit 300 may control the driving unit 200 to set the zero point of the load cell 140 by reflecting the operation of the cooperative robot 10 gripping the object. This is because the load applied to the load cell 140 may vary depending on the posture taken by the cooperative robot 10, so the load applied to the load cell 140 is accurately measured based on the operation in which the cooperative robot 10 actually grips the object. is to do
- the control unit 300 controls the arm unit 100 and the driving unit 200 to hold the object, and then measures the load using the load cell 140 . And the control unit 300 determines whether the measured load exceeds a preset payload, for example, a maximum allowable payload.
- the payload means a load received when the cooperative robot 10 operates in a state of gripping an object, that is, an operating load
- the maximum allowable payload means the maximum operating load allowed by the cooperative robot 10 .
- the control unit 300 releases the grip of the arm unit 100 to return the object to its original position.
- the control unit 300 performs zero setting and load measurement of the load cell 140 again.
- the control unit 300 When the load measured by the load cell 140 is less than or equal to the maximum allowable payload, the control unit 300 reflects the measured load to the payload. That is, the control unit 300 may measure a load applied when the cooperative robot 10 performs an operation while holding an actual object, and may set this as a payload of the cooperative robot 10 .
- control unit 300 may determine whether the arm unit 100 properly grips the object based on the load measured by the load cell 140 . For example, the control unit 300 may determine that the arm unit 100 has not properly gripped the object when it exceeds or falls short of the load range based on a preset load range. In addition, the control unit 300 may release the grip and then control the arm unit 100 to grip the object again.
- the sensor unit 400 may be disposed on one side of the control unit 300 to detect an object.
- the type of the sensor unit 400 is not particularly limited, and an optical sensor or an ultrasonic sensor using a laser or the like may be used.
- the control unit 300 may control the arm unit 100 and the driving unit 200 to grip the object.
- FIG. 5 shows a control method of the cooperative robot 10 according to an embodiment of the present invention.
- a method of controlling the cooperative robot 10 is a method of controlling the cooperative robot 10 including an arm unit 100 , a driving unit 200 , and a control unit 300 .
- the step of gripping the object the step of the control unit 300 controlling the driving unit 200 to detect the object with the arm unit 100, the load cell 140 included in the arm unit 100 measuring the load of the object; Determining whether the load of the object exceeds a preset payload, by the controller 300, if the load of the object is less than or equal to the preset payload, the controller 4300 changing the payload to the load of the object, and the object
- the control unit 300 may include releasing the grip of the arm unit 100 for gripping the object.
- the cooperative robot 10 detects an object using the sensor unit 400 .
- the sensor unit 400 detects an object using a laser or ultrasonic wave, and transmits it to the control unit 300 .
- control unit 300 controls the driving unit 200 based on the information about the position and size of the object received from the sensor unit 400 to grip the object with the arm unit 100 .
- the controller 300 controls the driving unit 200 to move the cooperative robot 10 to a position for gripping the object, and then controls the arm 100 to grip the object.
- control unit 300 may further include the step of setting the zero point of the load cell (140).
- the controller 300 may control the driving unit 200 in a state in which the cooperative robot 10 moves near the object to maintain the posture in which the arm unit 100 grips the object.
- the arm unit 100 is in a state in which the object is not gripped, and the cooperative robot 10 may maintain a state in which the object is actually gripped.
- the control unit 300 may set the zero point of the load cell 140 and then control the arm unit 100 to grip the object. Accordingly, the load of the object may be more accurately measured based on the posture in which the cooperative robot 10 is actually operated.
- the load cell 140 included in the arm unit 100 measures the load of the object.
- the arm unit 100 is applied in the first direction (for example, the Z-axis direction of The load can be accurately measured.
- the controller 300 may determine whether the load of the object exceeds a preset payload. For example, the control unit 300 may determine whether the load measured by the load cell 140 exceeds the maximum allowable payload.
- control unit 300 determines that the object is too heavy or that the operation of the cooperative robot 10 is incorrect, and releases the grip of the arm unit 100 that grips the object. have.
- the controller 300 sets the measured load of the object as the payload. That is, the controller 300 changes the preset payload to the load of the object.
- control unit 300 may determine whether the arm unit 100 properly grips the object based on the load measured by the load cell 140 . For example, if the control unit 300 sets the zero point of the load cell 140 and then the load measured when the object is gripped exceeds or falls below the preset load range, the arm unit 100 does not properly grip the object. can be judged not to be. In addition, the control unit 300 may release the grip and then control the arm unit 100 to grip the object again.
- the cooperative robot 10 and the control method of the cooperative robot 10 according to an embodiment of the present invention may cause the support shaft 150 of the arm unit 100 to move in a preset direction in the direction of the load to be measured. Accordingly, the cooperative robot 10 and the control method of the cooperative robot 10 according to an embodiment of the present invention can accurately measure the load applied in the direction to be measured even if the load and torque are applied in various directions.
- the cooperative robot 10 and the control method of the cooperative robot 10 can secure the operation stability of the cooperative robot 10 by resetting the payload of the cooperative robot 10 .
- connection or connection member of the lines between the components shown in the drawings exemplifies functional connections and/or physical or circuit connections, and in an actual device, various functional connections, physical connections that are replaceable or additional It may be expressed as a connection, or circuit connections.
- connection, or circuit connections unless there is a specific reference such as "essential”, “importantly”, etc., it may not be a necessary component for the application of the present invention.
- the present invention can be used in the collaborative robot industry.
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- Orthopedic Medicine & Surgery (AREA)
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Abstract
Description
Claims (10)
- 구동부, 암부 및 제어부를 포함하는 협동 로봇으로서,상기 암부는제1 플레이트;상기 제1 플레이트의 일면에 배치되며, 상기 협동 로봇과 상기 암부를 연결하는 커넥터;일면이 상기 제1 플레이트의 타면과 대향하도록 제1 방향으로 이격하여 배치되는 제2 플레이트;상기 제1 플레이트의 타면 및 상기 제2 플레이트의 일면과 접촉하도록 배치되고, 상기 제1 방향으로 가해지는 하중을 측정하여 상기 제어부로 전달하는 로드셀;상기 제1 플레이트와 상기 제2 플레이트의 사이에 적어도 1개 이상 배치되며, 상기 제1 방향으로 연장되는 지지 샤프트; 및대상체를 파지하는 그립;을 포함하는, 협동 로봇.
- 제1 항에 있어서,상기 지지 샤프트는일단부가 상기 제1 플레이트에 고정되고, 타단부가 상기 제2 플레이트의 일측에 이동 가능하도록 삽입되는, 협동 로봇.
- 제2 항에 있어서,상기 제2 플레이트는 상기 지지 샤프트의 타단부가 삽입되는 연결공을 구비하고,상기 지지 샤프트의 타단부를 감싸도록 상기 연결공에 배치되어, 상기 지지 샤프트의 이동 방향을 상기 제1 방향으로 구속하는 리니어 가이드를 더 포함하는, 협동 로봇.
- 제2 항에 있어서,상기 지지 샤프트의 타단부에 배치되며, 상기 지지 샤프트의 상기 제1 방향으로의 이동 거리를 구속하는 댐퍼;를 더 포함하는, 협동 로봇.
- 제1 항에 있어서,상기 제어부는 상기 로드셀로부터 전달받은 상기 대상체의 하중이 기 설정된 페이로드(payload) 이하인 경우, 상기 페이로드를 상기 대상체의 하중으로 변경하는, 협동 로봇.
- 제1 항에 있어서,상기 제어부는 상기 협동 로봇이 상기 대상체를 파지하는 자세를 기준으로 상기 로드셀의 영점을 설정하는, 협동 로봇.
- 구동부, 암부 및 제어부를 포함하는 협동 로봇을 제어하는 방법으로서,상기 협동 로봇이 대상체를 감지하는 단계;상기 제어부가 상기 구동부를 제어하여 상기 암부로 대상체를 파지하는 단계;상기 암부에 포함된 로드셀이 상기 대상체의 하중을 측정하는 단계;상기 제어부가 상기 대상체의 하중이 기 설정된 페이로드를 초과하는지 여부를 판정하는 단계;상기 대상체의 하중이 기 설정된 페이로드 이하인 경우, 상기 제어부가 상기 페이로드를 상기 대상체의 하중으로 변경하는 단계; 및상기 대상체의 하중이 기 설정된 페이로드를 초과하는 경우, 상기 제어부가 상기 대상체를 파지하는 상기 암부의 그립을 해제하는 단계;를 포함하는, 협동 로봇의 제어방법.
- 제7 항에 있어서,상기 대상체를 파지하는 단계 전에, 상기 제어부가 상기 협동 로봇이 상기 대상체를 파지하는 자세를 기준으로 상기 로드셀의 영점을 설정하는 단계를 더 포함하는, 협동 로봇의 제어방법.
- 제8 항에 있어서,상기 그립을 해제하는 단계 후에, 상기 로드셀의 영점을 다시 설정하여 상기 대상체의 하중을 측정하는, 협동 로봇의 제어방법.
- 제7 항에 있어서,상기 페이로드를 상기 대상체의 하중으로 변경하는 단계 후에, 상기 대상체를 파지했을 때 상기 로드셀이 측정한 하중이 기 설정된 하중 범위를 벗어날 경우, 상기 제어부는 상기 암부를 제어하여 상기 대상체를 다시 파지하도록 하는, 협동 로봇의 제어방법.
Priority Applications (3)
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US18/032,966 US20240001547A1 (en) | 2021-01-19 | 2022-01-13 | Cooperative robot having improved arm structure and method for controlling same |
CN202280007914.3A CN116669917A (zh) | 2021-01-19 | 2022-01-13 | 具有改进的手臂结构的协作机器人及其控制方法 |
EP22742766.3A EP4282602A4 (en) | 2021-01-19 | 2022-01-13 | COOPERATIVE ROBOT WITH IMPROVED ARM STRUCTURE AND METHOD FOR CONTROLLING THE SAME |
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KR10-2021-0007679 | 2021-01-19 | ||
KR1020210007679A KR20220105072A (ko) | 2021-01-19 | 2021-01-19 | 개선된 암 구조를 구비하는 협동 로봇 및 그 제어방법 |
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US (1) | US20240001547A1 (ko) |
EP (1) | EP4282602A4 (ko) |
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WO (1) | WO2022158790A1 (ko) |
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JPH0379289A (ja) * | 1989-08-23 | 1991-04-04 | Seiko Instr Inc | 減衰力可変型減衰器を有する産業用ロボット |
JP2007075974A (ja) * | 2005-09-16 | 2007-03-29 | Doshisha | インピーダンス制御によって制御されるロボット |
KR20120050683A (ko) * | 2010-11-11 | 2012-05-21 | 강정원 | 소재 반송장치 및 그 동작 제어방법 |
JP2013079931A (ja) * | 2011-09-20 | 2013-05-02 | Ishida Co Ltd | 質量測定装置 |
US20150224650A1 (en) * | 2014-02-12 | 2015-08-13 | General Electric Company | Vision-guided electromagnetic robotic system |
Family Cites Families (4)
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JPS4737123Y1 (ko) | 1968-05-09 | 1972-11-10 | ||
EP2500150B1 (en) * | 2008-08-29 | 2014-05-14 | ABB Research Ltd. | Compliant apparatus for the tool at the end of an arm of an industrial robot |
KR101473701B1 (ko) * | 2013-07-19 | 2014-12-18 | 주식회사 대한 | 로봇 아암용 부품로딩장치 |
US9333689B2 (en) * | 2013-10-30 | 2016-05-10 | Hanyang Robotics Co., Ltd. | Robot for processing injection molded product |
-
2021
- 2021-01-19 KR KR1020210007679A patent/KR20220105072A/ko not_active Application Discontinuation
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2022
- 2022-01-13 CN CN202280007914.3A patent/CN116669917A/zh active Pending
- 2022-01-13 EP EP22742766.3A patent/EP4282602A4/en not_active Withdrawn
- 2022-01-13 WO PCT/KR2022/000642 patent/WO2022158790A1/ko active Application Filing
- 2022-01-13 US US18/032,966 patent/US20240001547A1/en active Pending
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JPH0379289A (ja) * | 1989-08-23 | 1991-04-04 | Seiko Instr Inc | 減衰力可変型減衰器を有する産業用ロボット |
JP2007075974A (ja) * | 2005-09-16 | 2007-03-29 | Doshisha | インピーダンス制御によって制御されるロボット |
KR20120050683A (ko) * | 2010-11-11 | 2012-05-21 | 강정원 | 소재 반송장치 및 그 동작 제어방법 |
JP2013079931A (ja) * | 2011-09-20 | 2013-05-02 | Ishida Co Ltd | 質量測定装置 |
US20150224650A1 (en) * | 2014-02-12 | 2015-08-13 | General Electric Company | Vision-guided electromagnetic robotic system |
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See also references of EP4282602A4 * |
Also Published As
Publication number | Publication date |
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CN116669917A (zh) | 2023-08-29 |
EP4282602A1 (en) | 2023-11-29 |
US20240001547A1 (en) | 2024-01-04 |
KR20220105072A (ko) | 2022-07-26 |
EP4282602A4 (en) | 2024-06-26 |
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