Method and apparatus for measuring velocity of land vehicle...

Details Method and apparatus for measuring velocity of land vehicle... Method and apparatus for measuring velocity of land vehicle...

2008-07-15

2008-07-15

Tran, Dalena (Department: 3664)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

C342S104000

Reexamination Certificate

active

07400946

ABSTRACT:
A method and apparatus for measuring the velocity of a vehicle are provided. An acceleration measurement received from an accelerator and RGI data received from an external information server are stored and an irregularity constant of the accelerator is determined. It is determined whether the vehicle is in a stationary state by analyzing the acceleration measurement. If the vehicle is not in the stationary state, the inclination angle of a road on which the vehicle is traveling is calculated using a plurality of three-dimensional shape points included in the RGI data. A gravity acceleration component is compensated for from the acceleration measurement using the road inclination angle. The velocity of the vehicle is calculated using the compensated acceleration measurement.

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patent: 6675074 (2004-01-01), Hathout et al.
patent: 6959240 (2005-10-01), Okamoto

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