| 摘要 |
PURPOSE: To obtain a navigation system in which the relative position can be detected accurately even on a slope where the vehicle in clines while suppressing the effect of gravitational acceleration. CONSTITUTION: A relative position detector 4 delivers a speed obtained by integrating the output from an acceleration sensor 8 to a controller 8 along with an angular speed detected by a gyro sensor 7. A GPS(global positioning system) unit 2 receives a GPS signal and delivers accurate positional information to the controller 3. The controller 3 calculates the current position based on the information received from the unit 2 and the detector 4. Furthermore, the output from the acceleration sensor 8 is corrected by removing the gravitational acceleration component based on the output from an inclination sensor 15 to obtain accurate speed (distance) information thus enhancing accuracy in the detection of relative position. |
