Youjun Xiong 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).
Abstract: The present disclosure provides a localization method as well as a robot using the same. The method includes: obtaining laser scan points and particles; mapping each of the laser scan points to a global coordinate system based on each of the particles to obtain global boundary points of each of the particles; finding a matching boundary point in the global boundary points by comparing the global boundary points of the particle with points corresponding to static objects in a known map; calculating a distance between the matching boundary point of the particle and the points corresponding to the static objects, and increasing a weight of the matching boundary point if the distance is less than a preset threshold; calculating a weight of the particle by matching the global boundary points of the particle with the known map; and estimating a localization result.
December 2, 2019
July 30, 2020
ZHICHAO LIU, Jian Zhang, Youjun Xiong, Jianxin Pang
Abstract: The present disclosure provides a transmission hysteresis detecting method and apparatus. The method includes: transmitting a forward rotational instruction and a reverse rotational instruction to a motor of the servo; storing motor end positions of the motor and output shaft end positions of an output shaft corresponding to the motor in a forward rotational cycle and a reverse rotational cycle, respectively; generating first position data based on the motor end positions and the corresponding output shaft end positions in the forward rotational cycle; generating second position data based on the motor end positions and the corresponding output shaft end positions in the reverse rotational cycle; and calculating a transmission hysteresis of the servo based on the first position data and the second position data. The technical solutions of the present disclosure only needs to obtain the position data of one forward rotational cycle and one reverse rotational cycle.
July 12, 2019
Date of Patent:
July 28, 2020
UBTECH ROBOTICS CORP LTD
Youjun Xiong, Lifu Zhang, Wenhua Fan, Hanyu Sun
Abstract: The present disclosure provides a task management method for a robot, a robot using the same, and a computer readable storage medium. The method includes: obtaining a current task of the robot, in response to receiving a request for executing a new task of the robot; querying the preset state table according to the new task and the current task to determine whether to switch the robot from the current task to the new task: and switching the robot from the current task to the new task, in response to determining to switch. In this way, the stability of the operation of the robot can be improved, and the efficiency of the robot to execute tasks can be improved.
Abstract: An assembly of a robot includes a first member, a second member rotatably connected to the first member to construct a robot joint structure, a driving assembly arranged within the first member, a speed reducer assembly to rotatably connect the first member to the second member, and a belt drive assembly connected to the driving assembly and the speed reducer assembly. The belt drive assembly is used to transmit rotary motion from the driving assembly to the speed reducer assembly, thereby rotating the first member with respect to the second member.
Abstract: A spatial crossed-axis transmission mechanism includes a rotatable driving member, an actuating member, and a support member for fixing the driving member and the actuating member. The driving member comprises a first end surface adjacent to the support member, and an Archimedes spiral groove is defined in the first end surface of the driving member. The actuating member includes an end surf adjacent to the support member and a sliding shaft on the end surface of the actuating member. The support member defines a straight groove passing therethrough, and the sliding shaft comprises an end that extends through the straight groove and fits into the Archimedes spiral groove.
Abstract: The present disclosure provides a noise reduction processing method, system and terminal device. In the present disclosure, a position angle of a far-field audio input sound source and a microphone array as well as a rotation angle of a head servo of a robot are obtained, and then a target rotation angle of the robot is calculated. The head servo of the robot is controlled to rotate according to the target rotation angle such that the robot moves along with the far-field sound source, and a beam area is changed according to the target rotation angle to enable a sound source enhancement area to process far-field audios. As a result, the noise reduction performance of the microphone array beam is effectively improved.
Abstract: The present disclosure provides a relocalization method including: obtaining submap boundary points; drawing a first submap based on the submap boundary points; extracting a second submap from the first submap; performing a template matching on a known map based on the second submap to obtain first matching results; obtaining second matching result each corresponding to each of the first matching results based on a positional relationship of the second submap in the first submap: matching boundary points in each of the second matching results with the submap boundary points to filter out third matching results from the second matching results; and selecting one of the third matching results as a relocal i/at ion result. The present disclosure further provides a robot. In the above-mentioned manner, it is capable of realizing a re localization with high accuracy, high preciseness, and low error rate while there are environmental changes.
Abstract: A driving assembly of a robotic hand includes an actuator, a fixed member, an elastic member having an end connected to the actuator, two phalanxes rotatably connected to each other through a first revolute joint, one of which is rotatably connected to the fixed member through a second revolute joint, torsion springs mounted to the first revolute joint and the second revolute joint, a first pulling member having two opposite ends that are respectively fixed to the fixed member and the first revolute joint, a second pulling member having two opposite ends that are respectively fixed to the first revolute joint and the second revolute joint, and a third pulling member having two opposite ends that are respectively fixed to the actuator and the second one of the at least two phalanxes.
March 30, 2019
July 2, 2020
Sicong Liu, Youjun Xiong, Hongyu Ding, Jianxin Pang
Abstract: The present disclosure provides duplicate servo ID detection methods and a servo for a robot. One of the method includes: transmitting, by the main controller, a query instruction including a specific servo ID to at least two of the servos of the robot through a bus; differentiating feedback information replied by at least two of the servos corresponding to the specific servo ID; and determining, by the main controller, there being at least two of the servos with the same servo ID, if the feedback information not meeting a predetermined verification rule is received. Through the technical solution provided by this embodiment, the detection of duplicate servo ID can be realized, and the servos on the bus that have the same servo ID can be found so us to remind the user of the robot, thereby guaranteeing the normal operation of the robot.
Abstract: There are a biped robot gait control method and a biped robot, where the method includes: obtaining six-dimensional force information, and determining a motion state of two legs of the biped robot; calculating a ZMP position of each of two legs of the biped robot; determining a ZMP expected value of each of the two legs in real time; obtaining a compensation angle of an ankle joint of each of the two legs of the biped robot by inputting the ZMP position, a change rate of the ZMP position, the ZMP expected value, and a change rate of the ZMP expected value to an ankle joint smoothing controller so as to perform a close-loop ZMP tracking control on each of the two legs; adjusting a current angle of the ankle joint of each of the two legs of the biped robot in real time; and repeating the forgoing steps.
Abstract: The present disclosure is provides a servo control method as well as an apparatus and a robot using the same. The method includes: obtaining a teeth force reduction multiple of a gear of a servo; creating a voltage queue based on the teeth force reduction multiple; calculating a target loading voltage corresponding to a current moment based on a voltage queue; and applying the target loading voltage on a motor of the servo, wherein the target loading voltage is for driving the motor of the servo to rotate. Through the above-mentioned method, the loading voltage can be effectively reduced when the servo is started, thereby protecting teeth of the gear of the servo and increasing the service life of the servo.
Abstract: The present disclosure provides a robot joint motion control method and apparatus as well as a robot using the same. The method includes: obtaining coordinates of a plurality of key points of a motion of a joint of the robot based on a preset linear control model; determining coordinates of two smooth connecting points respectively before and after each key point based on a preset time connecting factor; calculating a joint motion trajectory between each two adjacent smooth connecting points using a preset parabola connecting formula, based on the coordinates of the two smooth connecting points and the corresponding key point; and controlling the joint of the robot to move according to the joint motion trajectory between each two adjacent smooth connecting points. The present disclosure can avoid the joints of a robot from overshooting, thereby enhancing the user experience.
Abstract: The present disclosure provides a servo calibration method as well as an apparatus and a robot using the same. The method includes: obtaining data of a position sensor on a motor shaft of the servo; obtaining data of a position sensor on an output shaft of the servo; determining whether a clutch protection has been performed on the servo based on data of the position sensor on the motor shaft and data of the position sensor on the output shaft; and calibrating a position of the motor shaft based on the data of the position sensor on the output shaft, if the clutch protection has been performed on the servo. Through the present disclosure, the problem in the prior art that the process of the calibration is cumbersome can be solved.
Abstract: A robot movement control method and apparatus as well as a robot using the same are provided. The method includes: calculating a distance between a robot and each UWB base station; configuring an internal coordinate system according to a preset position of the UWB base station, and calculating a coordinate of the robot in the internal coordinate system according to a distance between the UWB base station and the robot; combining the coordinate of the robot in the internal coordinate system with localization information of an odometer provided on the robot to obtain a combined robot coordinate; and controlling the robot to move in accordance with a preset target position according to the combined robot coordinate. In such manner, UWB base station localization can be used to control the movement of a robot in a limited scene.
Abstract: The present disclosure provides an impedance control method for a biped robot as well as an apparatus and a biped robot using the same. The method includes: correcting an impact force on a landing leg in the two legs of the biped robot using a natural attenuation function, and taking the corrected impact force as an input of an impedance control; obtaining an impedance model of the biped robot; determining a transfer function of the impedance control based on the impedance model; calculating an output of the impedance control based on the input of the impedance control and the transfer function of the impedance control; determining a joint angle of each joint based on the output of the impedance control and a planned pose of the biped robot; and transmitting joint angle information of each joint to motor(s) of the joint to perform the impedance control.
Abstract: The present disclosure provides a joint control method for a serial robot and a serial robot using the same. The method includes: performing a analysis on an end joint in the plurality of joints, and calculating the force of the previous joint acting on the end joint; performing a analysis on each of the other joints in the plurality of joints, and calculating the force of the previous joint acting on the joint; obtaining an angular velocity and an angular acceleration of each joint after obtaining the force of the previous joint acting on the joint, and calculating a torque corresponding to each joint; and projecting the torque corresponding to each joint to a motor corresponding to the joint to obtain a torque to be applied to the motor at a current time. In this manner, which improves the tracking precision of the end joint while reduces the tracking error.
Abstract: The present disclosure relates to robot technology, which provides a robot pose estimation method as well as an apparatus and a robot using the same. The method includes: obtaining, through an inertial measurement unit, initial 6DoF pose data; performing a first correction on the initial 6DoF pose data based on pose data obtained through an auxiliary sensor to obtain corrected 6DoF pose data; obtaining, through a 2D lidar sensor disposed on a stable platform, 3DoF pose data; and performing a second correction on the corrected 6DoF pose data based on the 3DoF pose data to obtain target 6DoF pose data. In this manner, the accuracy of the pose data of the robot is improved, and the accurate pose estimation of the robot is realized.
Abstract: The present disclosure provides an acceleration compensation method for a humanoid robot as well as an apparatus and a humanoid robot using the same. The method includes: calculating an angular acceleration of each joint and calculating a six-dimensional acceleration of a centroid of a connecting rod corresponding to the joint in an absolute world coordinate system, if the humanoid robot is in a single leg supporting state; calculating a torque required by the angular acceleration of each joint of the humanoid robot; determining a feedforward current value corresponding to the torque of each joint; and superimposing the feedforward current value on a control signal of each joint to control the humanoid robot. In this manner, the influence of the acceleration can be effectively suppressed, the rigidity of the PID controller of the humanoid robot can be reduced, thereby improving the stability of the entire humanoid robot.
Abstract: A building element for a modular device includes a male connector comprising M first magnets, a first ground terminal, a first detection terminal, a first power terminal, and a first signal terminal; and a female connector comprising M second magnets that are magnetically attractable to the first magnets, N second ground terminals, O second detection terminals, P second power terminals, and a second signal terminal. When the male connector of one building element is mechanically connected to the female connector of another building element, the first ground terminal, the first detection terminal, the first power terminal and the first signal terminal of the male connector of the one of two building elements respectively come into contact with one of the second ground terminals, one of the second detection terminals, one of the second power terminals, and the second signal terminal of the other one of the two building elements.