| 摘要 |
<p>The kinetic energy (5) expended by the drive is many times greater than that (6) expended by the person exerting manual force on the door. Under microprocessor control the overall velocity (v) rises (8) linearly to a max. (3) at which the door begins to move at uniform speed (9) until the force is removed (10). The speed then falls at a rate (7) characteristic of a purely manual door. The movement can be started by a switch, pushbutton or sensor.</p> |
