Electricity: motive power systems – Motor-reversing – Periodic- or intermittent-reversing
Reexamination Certificate
2007-10-05
2010-10-12
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Motor-reversing
Periodic- or intermittent-reversing
C318S266000, C318S456000, C318S468000, C318S469000
Reexamination Certificate
active
07812554
ABSTRACT:
A control device for an opening/closing member includes a speed detecting unit, a variation calculating unit, a judgment unit, a control unit, and a state detecting unit. The speed detecting unit detects a rotation speed of a motor for opening/closing the opening/closing member. The variation calculating unit calculates the variation in the rotation speed based on a present value and a past value of the rotation speed. The judgment unit compares the variation to a predetermined threshold value and judges whether or not a foreign object is trapped in the opening/closing member based on the comparison. The control unit controls the motor to open or stop the opening/closing member when the judgment unit judges that there is a foreign object trapped. The state detecting unit detects a state of the opening/closing member or a state of the surroundings of the opening/closing member.
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OMRON Corporation
Osha & Liang LLP
Ro Bentsu
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