| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation system which enables automatic detection of an antenna installation location with a higher accuracy than conventional techniques and enables correct measurement of the location. SOLUTION: The navigation system is equipped with a geolocation part 21, an antenna location memory 22m, an antenna location estimating part 22 and a matching part 23. The geolocation part 21 performs geolocation of the present location, based on a radio signal from a GPS satellite. The antenna location memory 22m stores the preceding antenna location Cp. The antenna location estimating part 22 calculates an antenna correction value Lc, based on traveling trace information calculated on the basis of the present antenna location Cc and the preceding antenna location Cp and on the location of an ETC gate. The matching part 23 corrects the present location by using the antenna correction value Lc, and based on prescribed map data and the corrected present location, executes a matching processing so that an accurate vehicle location be specified. COPYRIGHT: (C)2009,JPO&INPIT |
