公开(公告)号：US11485028B2

公开(公告)日：2022-11-01

申请号：US16566908

申请日：2019-09-11

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Zhihua Zhang ,  Mingguo Zhao ,  Hailei Li ,  Kang Li ,  Weining Zhang ,  Guangjun Hei ,  Xiaoyu He ,  Youjun Xiong

IPC: B25J17/02 ,  B25J19/00 ,  B25J19/02 ,  B62D57/032

Abstract: A linear joint includes a motor assembly includes a rotating shaft for outputting motion; a transmission mechanism including a screw and a nut threadedly connected to the screw, the nut being coaxial with respect to and securely connected to the rotating shaft so as to be rotatable together with the rotating shaft; and a rod connected to a first end of the screw so as to move together with the screw along a lengthwise direction of the screw.

公开(公告)号：US11475707B2

公开(公告)日：2022-10-18

申请号：US17134467

申请日：2020-12-27

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Yusheng Zeng ,  Jianxin Pang ,  Youjun Xiong

IPC: G06V40/16 ,  G06T7/00

Abstract: The present disclosure provides a method for extracting a face detection image, wherein the method includes: obtaining a plurality of image frames by an image detector, performing a face detection process on each image frame to extract a face area, performing a clarity analysis on the face area of each image frame to obtain a clarity degree of a face, conducting a posture analysis on the face area of each image frame to obtain a face posture angle, generating a comprehensive evaluation index for each image frame in accordance with the clarity degree of the face and the face posture angle of each image frame, and selecting a key frame from the image frames based on the comprehensive evaluation index. Such that the resource occupancy rate during image data processing may be reduced, and the quality of the face detection process may be improved.

公开(公告)号：US11423701B2

公开(公告)日：2022-08-23

申请号：US17118578

申请日：2020-12-10

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Miaochen Guo ,  Jingtao Zhang ,  Shuping Hu ,  Dong Wang ,  Zaiwang Gu ,  Jianxin Pang ,  Youjun Xiong

IPC: G06K9/62 ,  G06V40/20 ,  G06T7/73 ,  H04N1/60 ,  G06T5/00 ,  G06T7/90 ,  G06T7/64 ,  G06V10/22 ,  G06V10/56 ,  G06V20/40

Abstract: The present disclosure provides a gesture recognition method as well as a terminal device and a computer-readable storage medium using the same. The method includes: obtaining a video stream collected by an image recording device in real time; performing a hand recognition on the video stream to determine static gesture information of a recognized hand in each video frame of the video stream; encoding the static gesture information in the video frames of the video stream in sequence to obtain an encoded information sequence of the recognized hands; and performing a slide detection on the encoded information sequence using a preset sliding window to determine a dynamic gesture category of each recognized hand. In this manner, static gesture recognition and dynamic gesture recognition are effectively integrated in the same process. The dynamic gesture recognition is realized through the slide detection of the sliding window without complex network calculations.

公开(公告)号：US20220203522A1

公开(公告)日：2022-06-30

申请号：US17561629

申请日：2021-12-23

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Ligang Ge ,  Yizhang Liu ,  Chunyu Chen ,  Zheng Xie ,  Youjun Xiong

IPC: B25J9/16 ,  B62D57/02

Abstract: A robot control method includes: determining a planned capture point and a measured capture point of the robot so as to calculate a capture point error of the robot; obtaining positions of a left foot and a right foot of the robot, and a planned zero moment point (ZMP) of the robot so as to calculate desired support forces of the left foot and the right foot; calculating desired torques of the left foot and the right foot according to the capture point error, the desired support forces of the left foot and the right foot; obtaining measured torques of the left foot and the right foot so as to calculate desired poses of the left foot and the right foot; and controlling the robot to walk according to the desired poses of the left foot and the desired pose of the right foot.

公开(公告)号：US20220203521A1

公开(公告)日：2022-06-30

申请号：US17561609

申请日：2021-12-23

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Ligang Ge ,  Yizhang Liu ,  Chunyu Chen ,  Zheng Xie ,  Youjun Xiong

IPC: B25J9/16

Abstract: A control method for a robot includes: determining a desired zero moment point (ZMP) of the robot; obtaining a position of a left foot and a position of a right foot of the robot, and calculating desired support forces of the left foot and the right foot according to the desired ZMP, the positions of the left foot and the right foot; obtaining measured support forces of the left foot and the right foot, and calculating an amount of change in length of the left leg and an amount of change in length of the right leg according to the desired support forces of the left foot and the right foot, the measured support forces of the left foot and the right foot; and controlling the robot to walk according to the amount of change in length of the left leg and the right leg.

公开(公告)号：US11373443B2

公开(公告)日：2022-06-28

申请号：US17105667

申请日：2020-11-27

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Yue Wang ,  Jun Cheng ,  Yepeng Liu ,  Yusheng Zeng ,  Jianxin Pang ,  Youjun Xiong

IPC: G06V40/16 ,  G06K9/62 ,  G06T3/40 ,  G06T5/00 ,  G06T5/50

Abstract: The present disclosure provides a method and an apparatus for face recognition and a computer readable storage medium. The method includes: inputting a to-be-recognized blurry face image into a generator of a trained generative adversarial network to obtain a to-be-recognized clear face image; inputting the to-be-recognized clear face image to the feature extraction network to obtain a facial feature of the to-be-recognized clear face image; matching the facial feature of the to-be-recognized clear face image with each user facial feature in a preset facial feature database to determine the user facial feature best matching the to-be-recognized clear face image as a target user facial feature; and determining a user associated with the target user facial feature as a recognition result. Through this solution, the accuracy of the recognition of blurry faces can be improved.

公开(公告)号：US20220193902A1

公开(公告)日：2022-06-23

申请号：US17485412

申请日：2021-09-25

Applicant: UBTECH ROBOTICS CORP LTD.

Inventor： Xiaozhu Ju ,  Yuesong Wang ,  Mingguo Zhao ,  Youjun Xiong

IPC: B25J9/16

Abstract: A total centroid state estimation method as well as a humanoid robot and a computer readable storage medium using the same are provided. The method includes: obtaining a motion state of each real joint of the humanoid robot and a motion state of its floating base, where the floating base is equivalent to a plurality of sequent-connected virtual joints; calculating a joint position, a centroid position, and a rotation matrix of each link in the world coordinate system in sequence using the chain rule of homogeneous multiplication according to the position of the joint corresponding to the link to solve a Jacobian matrix of the centroid of the link; solving a total centroid Jacobian matrix based on the Jacobian matrix of the centroid of each link and the total mass; and calculating the total centroid velocity based on the total centroid Jacobian matrix and other parameters.

公开(公告)号：US20220156534A1

公开(公告)日：2022-05-19

申请号：US17389380

申请日：2021-07-30

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Yonghui Cai ,  Jun Cheng ,  Jianxin Pang ,  Youjun Xiong

IPC: G06K9/68 ,  G06K9/00 ,  G06T3/40

Abstract: A target object detection model is provided. The target object detection model includes a YOLOv3-Tiny model. Through the target object detection model, low-level information in the YOLOv3-Tiny sub-model can be merged with high-level information therein, so as to fuse the low-level information and the high-level information. Since the low-level information can be further used, the comprehensiveness of target detection is effectively improved, and the detection effect of small targets is improved.

公开(公告)号：US11267130B2

公开(公告)日：2022-03-08

申请号：US16727948

申请日：2019-12-27

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Hongjian Liu ,  Zhichao Liu ,  Jian Zhang ,  Simin Zhang ,  Zhanjia Bi ,  Youjun Xiong

IPC: B25J9/16 ,  G01C21/30

Abstract: The present disclosure relates to robot technology, and particularly to a robot localization method as well as an apparatus and a robot using the same. The method includes: obtaining a set of particles for localizing the robot; updating a position of each particle in the set of particles based on a preset motion model to obtain the updated position of the particle; obtaining laser measurement data and UWB measurement data; calculating a matching probability of each particle based on the laser measurement data, the UWB measurement data, and the updated position of the particle; and localizing the robot based on the matching probability of each particle. In such a manner, the UWB measurement data is applied to the traditional particle filtering localization algorithm based on laser measurement data so as to enhance the localization precision in large indoor scenes.

公开(公告)号：US11263453B2

公开(公告)日：2022-03-01

申请号：US16611476

申请日：2018-12-27

Applicant: UBTECH ROBOTICS CORP LTD

Inventor： Youjun Xiong ,  Liangliang Jia

IPC: G06K9/00 ,  H04W4/029 ,  G01S17/06 ,  G06T7/20 ,  H04W4/02

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.