Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2005-10-25
2005-10-25
Louis-Jacques, Jacques H. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C702S141000
Reexamination Certificate
active
06959240
ABSTRACT:
A correction device determines, by calculation, a real acceleration based on output from a velocity sensor4.GPS mediated signal receiving portion2receives radio navigation waves from plural GPS satellites. The device detects a frequency change of the radio waves evoked as a result of Doppler effect, acquires horizontal and vertical velocity components based on the frequency change, and determines, by calculation, a gradient angle. Then, the device determines, by calculation, the gravitational acceleration sine of the gradient angle (G. sin θ). The device adds the real acceleration and the gravitational acceleration sine of the gradient angle (G. sin θ) to provide a theoretical acceleration of the acceleration sensor. The device divides the theoretical acceleration of the acceleration sensor with the sensitivity of the acceleration sensor6, and subtracts the result from output from the acceleration sensor6, to provide a right offset value. Then, the sequentially obtained offset values are averaged to give an updated offset value. This process makes it possible to readily obtain a right offset value even during the driving of the mobile body.
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European Search Report dated Jun. 8, 2004.
Armstrong Kratz Quintos Hanson & Brooks, LLP
Louis-Jacques Jacques H.
Pioneer Corporation
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