Opening and closing member control system
AssigneeAsmo Co., Ltd.
InventorKazuyuki Hirai
Life of this patent
Estimating the term…
Abstract
A motor drives a window glass of a door of a vehicle in an opening direction and a closing direction. A rotation sensing device outputs a pulse signal in response to rotation of the motor. A controller senses pinching of an object by the window glass based on the rotational speed signal. Specifically, the controller computes a rate of change in the rotational speed, i.e., a rotational speed difference based on the rotational speed signal. The controller senses start of the pinching based on the rotational speed difference. When an amount of change in the rotational speed since the time of sensing the start of the pinching exceeds a pinching determining threshold value, the controller confirm the pinching of the object.
Claims11
An opening and closing member control system comprising:
- a drive means for driving an opening and closing member in an opening direction and a closing direction, respectively, of the opening and closing member;
- a moving speed sensing means for outputting a speed measurement signal, which indicates a moving speed that corresponds to movement of the opening and closing member driven by the drive means;
- and
- a pinching sensing means for sensing pinching of an object by the opening and closing member based on the speed measurement signal, wherein:
- the pinching sensing means computes an amount of change in the moving speed per unit interval based on the speed measurement signal;
- the pinching sensing means senses start of the pinching of the object by the opening and closing member based on the amount of change in the moving speed per unit interval;
- the pinching sensing means computes a total amount of change in the moving speed since time of sensing the start of the pinching of the object by the opening and closing member;
- and
- the pinching sensing means confirms the pinching of the object by the opening and closing member when the total amount of change in the moving speed exceeds a pinching determining threshold value.
Dependencies are inferred from the claim text.