| 摘要 |
PURPOSE:To obtain correct vehicle position data by executing a correction for obviating the error quantity and the delay error quantity with regard to position data of a moving body at the time of receiving an absolute position in the case absolute position data is received later than a beacon passing decision. CONSTITUTION:A navigation ECU 34 is provided with an error quantity calculating means, an error rate calculating means, a delay error quantity calculating mans, a simultaneous correcting means, and a delay correcting means, etc., for instance, as programs, and can execute a correction of vehicle position data with high accuracy, even if a time delay is generated between a position deciding signal P supplied from an on-vehicle beacon radio equipment 30 and a data transmission signal D (that is, absolute position data). Also, in the case the absolute position data is received later than a beacon passing decision, a delay correcting means executes a correction for obviating the error quantity and the delay error quantity with regard to position data of a moving body at the time of receiving an absolute position. In such a way, even in the case the absolute position data is received after the moving body passes through right under a beacon, correct moving body position data is obtained. |
