| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation system that is not necessary to take out a speed information inside a mobile body, easily attachable, and can measure the moving distance with precision at always. SOLUTION: Based on the output of an acceleration sensor 302 set at a mobile body, a mobile body stop judging part 4 judges when the mobile body is standstill, and an acceleration bias removing part 8 corrects an acceleration bias error based on the output of the acceleration sensor at standstill, and at the time of correction, a mobile body attaching angle of the acceleration sensor 302 is calculated by a rolling and pitching direction attaching angle calculation parts 28 and 30 for consideration, then based on such acceleration signal as with higher precision, a moving distance calculation part 10 calculates a moving distance, and based on the moving distance and the output of an azimuth detection part 32, a mobile body position calculation part 12 calculates the position of the mobile body. |
