Patent ID: 6552327
Filing Date: 2003-04-22
Classification: B64F

Abstract:
A device for positioning one end of a movable bridge in relation to a door on a craft, having a control unit for controlling at least the vertical movement of the bridge and for storing information on the position of the door on the craft,wherein the control unit comprises a sensor arranged to transmit electromagnetic radiation in different directions; and to detect reflections of said electromagnetic radiation; and that the control unit is arranged to measure the time difference between the transmission of radiation in at least two different directions and the detection of said radiation; to determine the position of the bridge in relation to the craft; to control the movement of said one end of the bridge to a position adjacent to the door in response to the determined position of the bridge and, the stored information on the position of the door; and after the bridge is connected to the craft to control at least the vertical movement of one end of the bridge to maintain the position adjacent to the door in response to the determined position of the bridge in relation to the craft and stored information on the position of the door.