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    • 10. 发明申请
    • AUTOMATIC CALIBRATION METHOD FOR ROBOT SYSTEM
    • 机器人系统自动校准方法
    • WO2017033100A1
    • 2017-03-02
    • PCT/IB2016/054946
    • 2016-08-18
    • TYCO ELECTRONICS (SHANGHAI) CO. LTDTYCO ELECTRONICS CORPORATIONTYCO ELECTRONICS UK LTD
    • DENG, YingcongZHANG, DandanLU, Roberto Francisco-YiLIU, YunHU, LvhaiZHOU, Lei
    • B25J9/16
    • B25J9/1692G05B2219/39008G05B2219/39026G05B2219/39054G05B2219/39398G05B2219/40607
    • An automatic calibration method for a robot system, including steps of: providing a ball-rod member comprising a connection rod and a sphere connected to one end of the connection rod; fixing the other end of the connection rod to an end execution tool mounted on a flange of a robot; controlling the robot to move a center of the sphere to the same one target point in various different poses under the guidance of a vision sensor, and calculating a transformation matrix Ts of the center of the sphere with respect to a center of the flange based on pose data of the robot at the same target point; and calculating a transformation matrix Tt of a center of the end execution tool with respect to the center of the flange according to a following formula (1): Tt = Ts * Tc (1), wherein Tc is a transformation matrix of the center of the end execution tool with respect to the center of the sphere, and Tc is known and constant. It needs to identify only the center of the sphere of the ball-rod member by the vision sensor, without a need to identify the center of the end execution tool. Since the sphere has a regular geometry, it is easy to identify the center of the sphere, improving the calibration accuracy and efficiency of the robot system.
    • 一种用于机器人系统的自动校准方法,包括以下步骤:提供一种球杆构件,其包括连接杆和连接到所述连接杆的一端的球体; 将连接杆的另一端固定到安装在机器人的凸缘上的末端执行工具; 控制机器人在视觉传感器的引导下以各种不同的姿态将球体的中心移动到相同的一个目标点,并且基于相对于凸缘的中心来计算球体的中心的变换矩阵Ts 将机器人的姿态数据放在同一个目标点上; 根据以下公式(1)计算终端执行工具的中心相对于凸缘的中心的变换矩阵Tt:Tt = Ts * Tc(1)其中,Tc是中心的变换矩阵, 结束执行工具相对于球的中心,Tc是已知的并且是常数。 它只需要通过视觉传感器识别球杆构件的球体的中心,而不需要识别最终执行工具的中心。 由于球体具有规则的几何形状,因此很容易识别球体的中心,提高了机器人系统的校准精度和效率。