US 9,809,313 B2
Cabin altitude alerting systems and methods
Kevin J Conner, Kent, WA (US); Yasuo Ishihara, Kirkland, WA (US); and Steve C. Johnson, Issaquah, WA (US)
Assigned to HONEYWELL INTERNATIONAL INC., Morris Plains, NJ (US)
Filed by Kevin J Conner, Kent, WA (US); Yasuo Ishihara, Kirkland, WA (US); and Steve C. Johnson, Issaquah, WA (US)
Filed on Jan. 22, 2007, as Appl. No. 11/625,764.
Prior Publication US 2008/0176501 A1, Jul. 24, 2008
Int. Cl. B64D 13/02 (2006.01)
CPC B64D 13/02 (2013.01) 11 Claims
OG exemplary drawing
 
1. A cabin pressure alerting system comprising:
a cabin altimeter configured to generate a cabin pressure value;
an alerting device; and
a processing device in data communication with the cabin altimeter and the alerting device, the processing device comprising:
a first component configured to determine if there is a problem with the cabin pressure based on the generated cabin pressure value;
a second component configured to determine rate of change of the cabin pressure;
a third component configured to set at least one of an alert volume or an alert frequency based on the rate of change of the cabin pressure if it was determined by the first component that a problem exists with the cabin pressure,
a fourth component configured to issue a cabin depressurization alert over the alerting device based on at least one of the set alert volume or alert frequency, if there is a problem with the cabin pressure value;
wherein the second and third components repeat operations until the first component determines that there is no longer a problem with the cabin pressure.