| 摘要 |
<p>An internal entrapment system (10) for a door (12) movable by a repeatable force includes a force generating device (68) for transferring the door (12) between a first and a second position. A trolley arm (34) connected between the force generating device (68) and the door (12) is continually strained during movement of the door (12). A sensor (50) mounted on the trolley arm (34) generates a signal (54) representative of the strain applied to the trolley arm (34). A processor (72) receives the strain signal (54) for comparison to a predetermined threshold, when the strain signal (54) exceeds the predetermined threshold, the processor (72) at least stops the force generating device (68). A potentiometer (74) is coupled to the door (12) for determining a plurality of positional locations of the door (12) between the first and the second positions, wherein the processor (72) correlates the position of the door (12) with the strain signal (54) for use in comparison to the predetermined threshold. A power supply (64) provides electrical power to the force generating device (68), the sensor (50), the processor (72), and the potentiometer (74), and a decoder/amplifier circuit (70), which also receives electrical power from the power supply (64) and receives the strain signal (54) for conversion into a format acceptable for use by the processor (72).</p> |
