System and method for safety management in roll-up doors
AssigneeRytec Corporation
InventorDaniel Gregoriou
Life of this patent
Estimating the term…
Abstract
A safety curtain and system includes multiple light emitters and multiple light receivers to detect traffic approaching a doorway. The safety curtain my include pairs of multiple light emitters and receivers positioned on both sides of a passageway (doorway) so as to detect approaching traffic. The multiple light emitters and light receivers may detect a height of an approaching traffic (e.g., person or vehicle) and initiate warning lights of a possible door closing. The detected approach of traffic may cause the door to be stopped, reversed or slow down. The system may include a computer to monitor the signals from the receivers and may control the motion of the door.
Claims11
An overhead door assembly comprising:
- a door panel;
- a motor for facilitating the raising and lowering of the door panel;
- a controller to control activation of the motor;
- a first light curtain in communication with the controller, the first light curtain comprising a first array of photo eye sets having a first plurality of light emitters and a first plurality of light receivers, the first array of photo eye sets extending vertically along the doorway and being positioned such that a beam emitted and received by each photo eye set in the first array of photo eye sets extends parallel to the door panel when the door panel is in a closed position, wherein each photo eye set in the first array of photo eye sets is set at a known vertical height along the doorway, and the controller is configured to determine a size of traffic passing through the first light curtain based;
- a second light curtain in communication with the controller, the second light curtain comprising a second array of photo eye sets having a second plurality of light emitters and a second plurality of light receivers, the second array of photo eye sets extending vertically along the doorway and being positioned such that a beam emitted and received by each photo eye set in the second array of photo eye sensors extends parallel to the door panel when the door panel is in a closed position, wherein each photo eye set in the second array of photo eye sets is set at a known vertical height along the doorway, and the controller is configured to determine a size of traffic passing through the second light curtain;
- wherein a protected zone monitored by the controller is formed around the door panel between the first light curtain and the second light curtain.
Dependencies are inferred from the claim text.