| 摘要 |
The invention relates to a system for restraining a vehicle at a loading dock, having a base, an arm rotatably mounted to the base for rotating between a lowered position out of contact with the vehicle, a partially elevated position and an upright position for contacting the vehicle to restrain the vehicle in a position suitable for loading or unloading, an arm rotator, a position sensor to detect the rotational position of the arm, a lock and a lock actuator for locking the arm, and a controller in operative communication with the position sensor for determining the position of the vehicle relative to the dock upon contact between the arm and the vehicle for actuating the lock to retain the arm in the upright position to restrain the vehicle. |
