| 摘要 |
A method for determining the movement direction and position of a vehicle, especially a track vehicle (7) based on satellite navigation, where first the position of the vehicle (7) is determined by measuring the code phase of signal (10) from the satellite navigation system with a width of the confidence (reliability) interval of the vehicle's (7) position determined by the statistical distribution as per the required reliability on a basically straight section (E) of track (8). The position determined in this manner is assigned to the corresponding position in the map database of the track (8) and the corresponding direction of the track (8) also in the map database of the track (8). The carrier phase (10) from at least one satellite (9) of the satellite navigation system is measured, whereas the position of this satellite at the time of this measurement is known, by at least one pair of antennas (2,3) located on the vehicle (7). This is followed by determining the difference between the measured values of the carrier phase of signal (10) received by individual antennas (2,3), then the known position of the satellite (9) and the position of at least one pair of antennas (2,3), determined from the known trajectory of the track (8) and assigned to the position of the vehicle (7) on the track (8), are used to determine the actual distances between antennas (2,3) and the satellite (9) and subsequently the difference between these distances for at least one pair of antennas (2,3). Comparing the differences of actual distances and the difference of measured carrier phases of signal (10) from satellite navigation system is used to select the closest differences and determine the actual position and movement direction of the vehicle (7) on the track (8). |
