Patents by Inventor Meihui Zhang
Meihui Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12285577Abstract: This invention pertains to the field of medical devices and specifically relates to an atrial shunt device and its manufacturing method, as well as the application of this device in an atrial shunt system. The atrial shunt comprises a middle channel structure with left atrial wall fixing structures and right atrial wall fixing structures on both sides. The left atrial wall fixing structure is a woven network structure formed by weaving threads through a weaving process, and it includes at least two layers of woven layers. By employing a multi-layer woven structure, this invention enhances the waist support compared to traditional single-layer woven structures, reduces the risk of opening blockage caused by excessive intimalization, lowers atrial pressure, improves patient cardiac function, and prolongs patient life.Type: GrantFiled: September 2, 2022Date of Patent: April 29, 2025Assignee: CHENXING (NANTONG) MEDICAL EQUIPMENT CO., LTD.Inventors: Yuchen Liang, Chengwen Jiang, Zhongliang Xiong, Meihui Zhang
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Patent number: 12172325Abstract: A collision detection method, a storage medium, and a robot are provided. The method includes: calculating an external torque of a first joint of the robot based on a preset generalized momentum-based disturbance observer; calculating an external torque of a second joint of the robot based on a preset long short-term memory network; calculating an external torque of a third joint of the robot based on the external torque of the first joint and the external torque of the second joint; and determining whether the robot has collided with an external environment or not based on the external torque of the third joint and a preset collision threshold. In the present disclosure, the component of the model error in the joint external torque calculated by the disturbance observer is eliminated to obtain the accurate contact torque, thereby improving the accuracy of the collision detection.Type: GrantFiled: December 6, 2022Date of Patent: December 24, 2024Assignee: UBTECH ROBOTICS CORP LTDInventors: Meihui Zhang, Yizhang Liu, Youjun Xiong, Huan Tan
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Patent number: 12115673Abstract: A robot obstacle avoidance method, a robot controller using the same, and a storage medium are provided. The method includes: determining an influence value of an obstacle on a motion range of a joint of the robot according to a position of the obstacle in a workspace of the robot; establishing a state transition relationship of the robot by taking a joint velocity of the robot as a control target and a joint angular velocity of the robot as a control input quantity; and avoiding the robot from colliding with the obstacle during a movement process of the robot by performing a model predictive control on the robot according to the state transition relationship and the influence value. In the present disclosure, the influence of the obstacle on the motion range of the joint of the robot is fully considered.Type: GrantFiled: November 3, 2022Date of Patent: October 15, 2024Assignee: UBTECH ROBOTICS CORP LTDInventors: Yizhang Líu, Youjun Xiong, Xianwen Zeng, Zhihao Zhang, Meihui Zhang, Chunyu Chen
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Publication number: 20240325698Abstract: This invention pertains to the field of medical devices and specifically relates to an atrial shunt device and its manufacturing method, as well as the application of this device in an atrial shunt system. The atrial shunt comprises a middle channel structure with left atrial wall fixing structures and right atrial wall fixing structures on both sides. The left atrial wall fixing structure is a woven network structure formed by weaving threads through a weaving process, and it includes at least two layers of woven layers. By employing a multi-layer woven structure, this invention enhances the waist support compared to traditional single-layer woven structures, reduces the risk of opening blockage caused by excessive intimalization, lowers atrial pressure, improves patient cardiac function, and prolongs patient life.Type: ApplicationFiled: September 2, 2022Publication date: October 3, 2024Inventors: Yuchen LIANG, Chengwen JIANG, Zhongliang XIONG, Meihui ZHANG
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Patent number: 12103187Abstract: A path planning method and a biped robot using the same are provided. The method includes: generating a candidate node set for a next foot placement based on a biped robot's own parameters and joint information of a current node, adding valid candidate nodes in the candidate node set to a priority queue so as to select optimal nodes for realizing next node expansion. These optimal nodes are output to generate a foot placement sequence from an initial node to a target node, which can greatly reduce the search amount for path nodes when the robot's legs intersect and touch the ground, thereby improving the efficiency of path planning.Type: GrantFiled: November 2, 2021Date of Patent: October 1, 2024Assignee: UBTECH ROBOTICS CORP LTDInventors: Xingxing Ma, Chunyu Chen, Ligang Ge, Yizhang Liu, Hongge Wang, Jie Bai, Zheng Xie, Jiangchen Zhou, Meihui Zhang, Shuo Zhang, Youjun Xiong
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Publication number: 20240009841Abstract: A dynamic target tracking method for a robot having multiple joints includes: obtaining a motion state of a tracked dynamic target in real time; performing motion prediction according to the motion state at a current moment to obtain a predicted position of the dynamic target; performing lag compensation on the predicted position to obtain a compensated predicted position; performing on-line trajectory planning according to the compensated predicted position to obtain planning quantities of multi-step joint motion states at multiple future moments, and determining a multi-step optimization trajectory according to the planning quantities and a multi-step optimization objective function; and controlling the joints of the robot to according to the multi-step optimization trajectory.Type: ApplicationFiled: July 3, 2023Publication date: January 11, 2024Inventors: Jindi Zhang, Youjun Xiang, Meihui Zhang
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Publication number: 20230191606Abstract: A collision detection method, a storage medium, and a robot are provided. The method includes: calculating an external torque of a first joint of the robot based on a preset generalized momentum-based disturbance observer; calculating an external torque of a second joint of the robot based on a preset long short-term memory network; calculating an external torque of a third joint of the robot based on the external torque of the first joint and the external torque of the second joint; and determining whether the robot has collided with an external environment or not based on the external torque of the third joint and a preset collision threshold. In the present disclosure, the component of the model error in the joint external torque calculated by the disturbance observer is eliminated to obtain the accurate contact torque, thereby improving the accuracy of the collision detection.Type: ApplicationFiled: December 6, 2022Publication date: June 22, 2023Inventors: Meihui Zhang, Yizhang Liu, Youjun Xiong, Huan Tan
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Publication number: 20230158672Abstract: A robot obstacle avoidance method, a robot controller using the same, and a storage medium are provided. The method includes: determining an influence value of an obstacle on a motion range of a joint of the robot according to a position of the obstacle in a workspace of the robot; establishing a state transition relationship of the robot by taking a joint velocity of the robot as a control target and a joint angular velocity of the robot as a control input quantity; and avoiding the robot from colliding with the obstacle during a movement process of the robot by performing a model predictive control on the robot according to the state transition relationship and the influence value. In the present disclosure, the influence of the obstacle on the motion range of the joint of the robot is fully considered.Type: ApplicationFiled: November 3, 2022Publication date: May 25, 2023Inventors: YIZHANG LIU, Youjun Xiong, Xianwen Zeng, Zhihao Zhang, Meihui Zhang, Chunyu Chen
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Publication number: 20230130977Abstract: A method for controlling a robot comprising an end effector includes: establishing at steady state between the end effector and a working surface through a preset impedance control mechanism, and adjusting a contact force between the end effector and the working surface according to a preset desired force; obtaining a contact torque generated by the contact force; controlling the end effector to rotate according to the contact torque until a pose of the end effector is consistent with a pose of the working surface; and controlling the end effector to move tangentially along the working surface.Type: ApplicationFiled: December 28, 2022Publication date: April 27, 2023Inventors: Xianwen Zeng, Yizhang Liu, Meihui Zhang, Jinliang Chen, Youjun Xiong
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Publication number: 20220203534Abstract: A path planning method and a biped robot using the same are provided. The method includes: generating a candidate node set for a next foot placement based on a biped robot's own parameters and joint information of a current node, adding valid candidate nodes in the candidate node set to a priority queue so as to select optimal nodes for realizing next node expansion. These optimal nodes are output to generate a foot placement sequence from an initial node to a target node, which can greatly reduce the search amount for path nodes when the robot's legs intersect and touch the ground, thereby improving the efficiency of path planning.Type: ApplicationFiled: November 2, 2021Publication date: June 30, 2022Inventors: Xingxing Ma, Chunyn Chen, Ligang Ge, Yizhang Liu, Hongge Wang, Jie Bai, Zheng Xie, Jiangchen Zhou, Meihui Zhang, Shuo Zhang, Youjun Xiong
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Patent number: 11325247Abstract: The present disclosure provides a robotic arm control method as well as an apparatus and a terminal device using the same. The method includes: obtaining a current joint angle of each of M joints of the robotic arm; obtaining a reference included angle based on the current joint angle of each of the M joints of the robotic arm; determining an expected included angle corresponding to the robotic arm within a target angle range based on the reference included angle and the preset included angle related evaluation function; and controlling the robotic arm based on the target joint angles of the M joints.Type: GrantFiled: March 12, 2020Date of Patent: May 10, 2022Assignee: UBTECH ROBOTICS CORP LTDInventors: Zecai Lin, Zhaohui An, Yizhang Liu, Meihui Zhang, Youjun Xiong, Jianxin Pang
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Patent number: 10726018Abstract: Techniques and constructs to facilitate semantic matching and automated annotation (SMA) of attributes can take entity names and a keyword describing an attribute associated with the named entities as input and leverage a corpus of data such as data from tables, which can include HTML web tables, to automatically populate values associated with the named entities for the attribute. The constructs enable accurate SMA of attributes, such as attributes that relate to the entity and include numeric values in a different unit than the query, in a different scale than the query, and/or reflecting a time different from that of the query. An entity augmentation application programming interface (API) may be used to accept queries that include numeric criteria, parameters, or arguments, including query attributes represented by numeric values, which may be in different units or scales, and attributes represented by numeric values that can vary by time.Type: GrantFiled: February 10, 2014Date of Patent: July 28, 2020Assignee: MICROSOFT TECHNOLOGY LICENSING, LLCInventors: Kaushik Chakrabarti, Meihui Zhang
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Publication number: 20150227589Abstract: Techniques and constructs to facilitate semantic matching and automated annotation (SMA) of attributes can take entity names and a keyword describing an attribute associated with the named entities as input and leverage a corpus of data such as data from tables, which can include HTML web tables, to automatically populate values associated with the named entities for the attribute. The constructs enable accurate SMA of attributes, such as attributes that relate to the entity and include numeric values in a different unit than the query, in a different scale than the query, and/or reflecting a time different from that of the query. An entity augmentation application programming interface (API) may be used to accept queries that include numeric criteria, parameters, or arguments, including query attributes represented by numeric values, which may be in different units or scales, and attributes represented by numeric values that can vary by time.Type: ApplicationFiled: February 10, 2014Publication date: August 13, 2015Applicant: Microsoft CorporationInventors: Kaushik Chakrabarti, Meihui Zhang