Control device for opening/closing member
First Claim
1. A control device for opening/closing member comprising:
- a speed detecting unit for detecting a rotation speed of a motor for opening/closing the opening/closing member;
a variation calculating unit for calculating variation in the rotation speed based on a present value and a past value of the rotation speed detected by the speed detecting unit;
a judgment unit for comparing the variation calculated by the variation calculating unit and a predetermined threshold value and judging whether or not a foreign object is entrapped in the opening/closing member based on the comparison result;
a control unit for controlling the motor to open or stop the opening/closing member when judged that the foreign object is entrapped by the judgment unit; and
a state detecting unit for detecting a state of the opening/closing member or state of surrounding of the opening/closing member;
whereinthe variation calculating unit selects an earlier past value or a past value close to the present as the past value of the rotation speed according to the state detected by the state detecting unit, and calculates the variation in the rotation speed using the selected past value and the present value.
2 Assignments
0 Petitions
Accused Products
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.
14 Citations
9 Claims
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1. A control device for opening/closing member comprising:
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a speed detecting unit for detecting a rotation speed of a motor for opening/closing the opening/closing member; a variation calculating unit for calculating variation in the rotation speed based on a present value and a past value of the rotation speed detected by the speed detecting unit; a judgment unit for comparing the variation calculated by the variation calculating unit and a predetermined threshold value and judging whether or not a foreign object is entrapped in the opening/closing member based on the comparison result; a control unit for controlling the motor to open or stop the opening/closing member when judged that the foreign object is entrapped by the judgment unit; and a state detecting unit for detecting a state of the opening/closing member or state of surrounding of the opening/closing member;
whereinthe variation calculating unit selects an earlier past value or a past value close to the present as the past value of the rotation speed according to the state detected by the state detecting unit, and calculates the variation in the rotation speed using the selected past value and the present value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification