Barometric floor level indicator

Details Barometric floor level indicator Barometric floor level indicator

2007-01-09

2007-01-09

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Relative location

C701S213000

Reexamination Certificate

active

10984531

ABSTRACT:
The invention relates to a device, system, and method for providing a multi-mode navigation device. In a first mode of operation, the navigation device provides position information based on a radio frequency navigation signals. If radio signals become unavailable, the navigation device enters a second mode of operation. In the second mode of operation the navigation device stores the most recent elevation and associates it with a reference elevation, the reference elevation is associated with an entry floor. The difference between a current elevation and the reference elevation is determined and this difference is divided by a floor height to obtain a floor number. The navigation device provides the floor number while reliable global position information is unavailable.

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patent: 2002-48569 (2002-02-01), None

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