公开(公告)号：US6100658A

公开(公告)日：2000-08-08

申请号：US080469

申请日：1998-05-19

申请人： Masato Kume ,  Noritaka Ohiro

发明人： Masato Kume ,  Noritaka Ohiro

IPC分类号： B60J7/057 ,  H02H1/04 ,  H02H7/085 ,  B60J1/17 ,  E05F15/16

CPC分类号： B60J7/0573 ,  E05F15/41 ,  H02H7/0851 ,  E05Y2400/54 ,  E05Y2400/554 ,  E05Y2400/57 ,  E05Y2400/58 ,  E05Y2800/40 ,  E05Y2900/55 ,  H02H1/04

摘要： A rotational speed sensor generates pulses having a period proportional to the speed of a motor, while a pulse period calculator section calculates the period of the pulses. A jamming determination section calculates the motor load based on the pulse period and detects that an object is jammed when the load exceeds a predetermined threshold. Once it has been judged than an object is jammed, a drive control section stops and controls the motor for reverse rotation, thereby releasing the object. A door opening and closing detection section further detects the opening or closing operation of a door which is one disturbance factor. If the door is opened or closed, an inhibit control section inhibits jamming judgment for a predetermined period of time thereafter. This prevents an incorrect judgment due to the opening or closing of the door.

摘要翻译： 旋转速度传感器产生具有与电动机的速度成比例的周期的脉冲，而脉冲周期计算部分计算脉冲的周期。 干扰确定部分根据脉冲周期来计算电机负载，并且当负载超过预定阈值时检测到对象被卡住。 一旦判断出物体被卡住，驱动控制部就停止并控制马达反向旋转，从而释放物体。 门打开和关闭检测部分还检测作为一个干扰因素的门的打开或关闭操作。 如果门被打开或关闭，禁止控制部分在此后禁止预定的时间段的卡纸判断。 这防止由于门的打开或关闭而导致的错误判断。