Offset detection of acceleration sensor and navigation system

Details Offset detection of acceleration sensor and navigation system Offset detection of acceleration sensor and navigation system

2006-08-28

2010-06-29

Tran, Khoi (Department: 3664)

Data processing: vehicles, navigation, and relative location

Navigation

C701S034000, C701S070000, C701S074000, C701S079000, C701S207000, C701S216000

Reexamination Certificate

active

07747383

ABSTRACT:
To accurately detect a zero gravity offset in an acceleration sensor. As an embodiment of the present invention, in the case where position information can be obtained from a GPS processing section, a velocity detecting unit performs an operation according to Expression (15), using real detected acceleration αGr that was actually obtained from the acceleration sensor, vehicle acceleration αP based on the position information, distance Dm, an amount of height change Dh based on pressure PR, and gravity acceleration g. Therefore, offset acceleration αo can be accurately calculated, and an acceleration detection signal can be converted into detected acceleration αG with high accuracy, based on a zero gravity offset value Vzgo by that the above offset acceleration αo was converted.

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