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241.发明申请公开(公告)号：US20220019196A1
公开(公告)日：2022-01-20
申请号：US17088596
申请日：2020-11-04
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： YUESONG WANG , Xiaozhu Ju , Mingguo Zhao , Youjun Xiong
IPC: G05B19/4155 , G05B19/416 , B25J9/16
Abstract: A feedforward control method comprising steps of: acquiring kinematic parameters of each joint of a robot based on inverse kinematics according to a pre-planned robot motion trajectory, and setting a center of a body of the robot as a floating base; determining a six-dimensional acceleration of a center of mass of each joint of the robot in a base coordinate system using a forward kinematics algorithm, based on the kinematic parameters of each joint of the robot, and converting the six-dimensional acceleration of the center of mass of each joint of the robot in the base coordinate system to a six-dimensional acceleration in a world coordinate system; and calculating a torque required by a motor of each joint of the robot using an inverse dynamic algorithm, and controlling the motors of corresponding joints of the robot.
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242.发明申请公开(公告)号：US20220009093A1
公开(公告)日：2022-01-13
申请号：US17192906
申请日：2021-03-05
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Xiaoyu Ren , Liqun Huang , Mingguo Zhao , Youjun Xiong
Abstract: A task hierarchical control method as well as a robot and a storage medium using the same are provided. The method includes: obtaining a task instruction for a robot, where the task instruction is for determining a target task card including an amount of selection matrices for dividing a target task into the amount of hierarchical subtasks and a controller name for executing each of the hierarchical subtasks; obtaining a null space projection matrix of each of the hierarchical subtasks based on the corresponding selection matrix; generating control finks of the amount according to the corresponding controller of each of the hierarchical subtasks and the corresponding null space projection matrix; calculating a control torque of each of the control links and obtaining a hierarchical control output quantity by adding ail the control torques; and controlling the robot to perform the target task using the hierarchical control output quantity.
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公开(公告)号：US11204249B2
公开(公告)日：2021-12-21
申请号：US16396690
申请日：2019-04-28
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Yongsheng Zhao , Youjun Xiong
Abstract: The present disclosure provides a positioning method and a robot with the same. The method is applied to a robot having a camera, the method includes: taking a photo of a predetermined area, wherein the predetermined area comprises a marker pattern area; identifying at least two marker points of the marker pattern area and obtaining first coordinate data of each marker point; calculating second coordinate data of the robot in a world coordinate based on parameters of the camera and the first coordinate data of the marker points; and calculating angle data of the robot in the world coordinate based on the first coordinate data of the marker points and the second coordinate data of the robot in the world coordinate. Through the above-mentioned positioning method, the robot can quickly perform monocular visual positioning and reduce the calculation amount of positioning.
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公开(公告)号：US20210387332A1
公开(公告)日：2021-12-16
申请号：US17345005
申请日：2021-06-11
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Zhe Xu , Mingguo Zhao , Youjun Xiong
IPC: B25J9/16 , B25J13/08 , G05D1/08 , B62D57/032
Abstract: A method for a multi-legged robot having a body and a number of legs, includes: obtaining a current pose of the body, forces applied to the body, and joint angles of each of supporting legs of the legs; creating a mapping matrix from the forces applied to the body to desired support forces applied to soles of the supporting legs; obtaining priority targets by prioritizing the forces acting in different directions, determining a weight matrix for each priority target, and creating an optimization model of the support forces for each priority target based on the mapping matrix and the weight matrices; solving the optimization model of each of the priority targets to obtain the desired support forces corresponding to each of the priority targets; and calculating joint torques of the supporting legs for joint control, based on the solved desired support forces and Jacobian matrices corresponding to the supporting legs.
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245.发明申请公开(公告)号：US20210354299A1
公开(公告)日：2021-11-18
申请号：US16611475
申请日：2018-12-26
Applicant: UBTECH ROBOTICS CORP
Inventor： Youjun Xiong , Xu Hu , Peng Nie
Abstract: The present disclosure provides an external parameter calibration method for robot sensors as well as an apparatus, robot and storage medium with the same. The method includes: obtaining first sensor data and second sensor data obtained through a first sensor and a second sensor of the robot by collecting position information of a calibration reference object and converting to a same coordinate system to obtain corresponding first converted sensor data and second converted sensor data, thereby determining a first coordinate and a second coordinate of a reference point of the calibration reference object; using the first coordinate and the second coordinate are as a set of coordinate data; repeating the above-mentioned steps to obtain N sets of the coordinate data to calculate the external parameter between the first sensor and the second sensor in response to a relative positional relationship between the robot and the calibration reference object being changed.
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Patent Agency Ranking
公开(公告)号：US20210347059A1
公开(公告)日：2021-11-11
申请号：US16870903
申请日：2020-05-09
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Chengkun Zhang , Marten Byl , Muhammed Rasid Pac , Raymond Ma , Luis Alfredo Mateos Guzman , Won Suk You , Huan Tan , Youjun Xiong
IPC: B25J11/00 , B25J5/00 , B65G1/02 , B65G61/00 , B25J9/16 , B25J19/02 , B25J9/10 , B25J9/12 , B25J19/00 , B25J9/00
Abstract: A robotic assistant includes a wheeled base, a storage unit including drawers, a foldable arm connected to a top of the storage unit and including an end of arm tooling (EOAT) connected to a distal end of the foldable arm, an elevation mechanism positioned on the wheeled base and used to move the storage unit up and down, and a control system that receives command instructions. In response to the command instructions, the control system is configured to move the wheeled base, open or close the one or more drawers, actuate movement of the foldable arm and the EOAT to pick up and place external objects from/to a determined location, and control the storage unit to move up/down.
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公开(公告)号：US20210334534A1
公开(公告)日：2021-10-28
申请号：US16611476
申请日：2018-12-27
Applicant: UBTECH ROBOTICS CORP
Inventor： Youjun Xiong , Liangliang Jia
Abstract: The present disclosure relates to an object trajectory tracking and displaying method, comprising the following steps of: creating a mapping relationship database of image features and WIFI information for objects in a distributed search server, where each WIFI information includes position information; receiving a trajectory query request for a monitored object; searching the mapping relationship database of image features and WIFI information for objects according to an image feature of the monitored object to produce a WIFI information set, and producing a corresponding position information set based on the WIFI information set; and generating real-time trajectory information of the monitored object based on the position information set. The object trajectory tracking and displaying method and system of the present disclosure make the position of the sampling data points more accurate and improve the accuracy of trajectory querying.
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公开(公告)号：US20210331323A1
公开(公告)日：2021-10-28
申请号：US16861200
申请日：2020-04-28
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Houzhu Ding , Mohammad Iman Mokhlespour Esfahani , Chengkun Zhang , Huan Tan , Youjun Xiong
Abstract: A control system for a neck mechanism includes a perception system configured to track movement of an object, and a perception control system that controls a rotary motor to yaw a platform and controls a first linear actuator and a second linear actuator that is in parallel with the first linear actuator to pitch and roll the platform according to a target position of the platform. The perception system tracks movement of the object by estimating its position and pose in 3D space and the platform is moved according to a vision-based position and pose estimation result.
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公开(公告)号：US20210331310A1
公开(公告)日：2021-10-28
申请号：US16861201
申请日：2020-04-28
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Mohammad Iman Mokhlespour Esfahani , Houzhu Ding , Chengkun Zhang , Huan Tan , Youjun Xiong
Abstract: A neck mechanism for a robot includes a first linear actuator, a second linear actuator in parallel with the first actuator, a rotary stage, and a support shaft positioned behind and between the first linear actuator and the second linear actuator. The first linear actuator and the second linear actuator are both connected between a platform and the rotary stage via joints, and the support shaft is connected between the upper platform and the rotary stage via a joint. The rotary motor is configured to rotate the rotary stage to yaw the platform and the first linear actuator and the second linear actuator are configured to pitch/roll the platform.
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250.发明授权公开(公告)号：US11126824B2
公开(公告)日：2021-09-21
申请号：US16805827
申请日：2020-03-01
Applicant: UBTECH ROBOTICS CORP LTD
Inventor： Yusheng Zeng , Jianxin Pang , Youjun Xiong
Abstract: The present disclosure provides a face image quality evaluating method as well as an apparatus and a computer-readable storage medium using the same. The method includes: obtaining a face image; determining a local bright area in the face image, wherein the local bright area is formed by an illumination source in the face image, and the brightness of the local bright area is greater than the brightness of a face area in the face image; removing the local bright area from the face image; and evaluating a quality of the face image based on the face image having removed the local bright area. In the above-mentioned manner, the present disclosure improves the accuracy of the quality evaluation of the face image.
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