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.
Claims18
A door and door safety system comprising:
- a door having a door panel for selectively permitting and prohibiting access to a door opening;
- a first light curtain set positioned on a first side of the door opening comprising a first light emitting device having a first plurality of light emitters and a first light receiving device having a first plurality of light detectors, the first plurality of light detectors being configured to receive and detect a first plurality of light beams emitted by the first plurality of light emitters;
- at least one first warning light, the at least one first warning light being coupled to at least one of the first light emitting device or the first light receiving device;
- a second light curtain set positioned on a second side of the door opening comprising a second light emitting device having a second plurality of light emitters and a second light receiving device having a second plurality of light detectors, the second plurality of light detectors being configured to receive and detect a second plurality of light beams emitted by the second plurality of light emitters;
- at least one second warning light, the at least one second warning light being coupled to at least one of the second light emitting device or the second light receiving device,
- wherein, the first light curtain and the second light curtain form a zone surrounding the door panel, the first light curtain and the second light curtain being configured to measure one or more of a height or a width of all traffic entering and exiting the zone.
A method of controlling a door and providing door safety, the method comprising the steps of:
- providing a door which can be opened and closed to selectively permit and prohibit access to a door opening;
- detecting traffic proximate a first side of the door opening using a first light curtain;
- detecting traffic proximate a second side of the door opening using a second light curtain;
- determining a height of all traffic approaching the door opening detected by the first light curtain or the second light curtain;
- controlling operation of the door based on the detection of traffic by the first and second light curtains;
- stopping operation of the door while traffic lingers between the first light curtain and the second light curtain until traffic matching the height of all detected traffic sensed by the first light curtain or the second light curtain has exited the area between light curtains.
Dependencies are inferred from the claim text.