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    • 4. 发明申请
    • Balance control system for a movable barrier operator
    • 平衡控制系统,用于可移动屏障操作员
    • US20030192254A1
    • 2003-10-16
    • US10119817
    • 2002-04-10
    • The Chamberlain Group, Inc.
    • Thomas A. BrookbankJames J. Fitzgibbon
    • E05F011/00
    • E05F15/668E05D13/10E05Y2400/506E05Y2900/106
    • A balance control system comprises a motor, a transmission system providing connection between the motor and the door and adapted to move the door between a closed position and an open position located above the closed position, a counterbalance system to reduce power required to lift the door, an apparatus to generate first signal representing a force used to move the door from the closed position to the open position, and to generate a second signal representing a force used to move the door from the open position to the closed position, and a controller responsive to the first signal and to the second signal to indicate an imbalance of the door when a difference between the first signal and the second signal exceeds a predetermined threshold.
    • 平衡控制系统包括电动机,传动系统,其提供电动机和门之间的连接并且适于在关闭位置和位于关闭位置上方的打开位置之间移动门;平衡系统,以减少提升门所需的动力 ,产生表示用于将门从关闭位置移动到打开位置的力的第一信号的装置,以及产生表示用于将门从打开位置移动到关闭位置的力的第二信号,以及控制器 响应于第一信号和第二信号,以在第一信号和第二信号之间的差异超过预定阈值时指示门的不平衡。