Abstract: A door control system is provided. The control system includes a controller configured to control a door via a motor. The door includes an accelerometer which provides output data to the controller. The controller may receive commands to actuate the motor to effect movement in the door. The controller may compare accelerometer output values to reference values to determine whether to allow the motor to be actuated. The controller may determine whether to actuate the motor based on the accelerometer values before and/or during actuation of the motor.

Abstract: A door control system is provided. The control system includes a controller configured to control a door via a motor. The motor is powered by a battery and bypasses the controller via relays and/or switches when power to the controller is disconnected. The current of the motor may be monitored and/or displayed to confirm that the door is balanced.

Abstract: 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.

Abstract: The invention relates to a vehicle restraint system for preventing forward movement of a vehicle away from a loading dock, having a base, an arm rotatably mounted to said base for rotating between a lowered position out of contact with said vehicle, a partially elevated position comprising a predetermined range and an upright position wherein said arm may contact said vehicle to restrain said vehicle in a position suitable for loading or unloading, an arm rotator for rotating said arm between said lowered and upright positions, a contact sensor for detecting contact between said arm and said vehicle, a position sensor to detect the rotational position of said arm, a lock, and a lock actuator in operative communication with said contact sensor and position sensor for actuating said lock to retain said arm when in said upright position.