Car navigation system and storage medium
AssigneeAisin Aw Co., Ltd.
InventorsAkira Ishida, Shinichi Kato
Life of this patent
Estimating the term…
Abstract
A vehicle navigation system and storage medium for determining an estimated position of a vehicle. The system and storage medium comprises at least an input unit, a present position detection unit, a storage unit, a central processing unit, an information transmission/reception unit and an output unit. Information concerning route guidance is input, as is present position detected information, and stored such that calculation of an estimated position of a vehicle may be generated based on a variety of conditions such as vehicle speed history, elevation angle of a satellite position relative to the vehicle, and penalty values attributed to the types of roads traveled.
Claims12
A car-navigation system for determining an estimated position of a vehicle, comprising:
- reception means for receiving positioning satellite information, wherein the positioning satellite information comprises at least one electric wave from a plurality of positioning satellites;
- vehicle speed detection means for detecting the speed of a vehicle;
- at least one storage means for storing the received positioning satellite information and detected vehicle speed information;
- calculation means for calculating a variation in the number of electric waves received from the plurality of positioning satellites;
- and
- estimated position determination means for determining the estimated position of a vehicle;
- wherein the estimated position determination means judges whether the vehicle has passed a tollgate based on the variation in the number of electric waves received from the plurality of positioning satellites calculated by the calculation means and the vehicle speed information stored in the storage means.
A car-navigation system for estimating whether a vehicle travels an upper or lower road of a multilayer road, comprising:
- means for allocating comparison coefficients to a plurality of judgment conditions;
- and
- means for estimating whether a vehicle travels on the upper or lower road of a multilayer road based on a sum of comparison coefficients, wherein at least one of the plurality of judgment conditions relates to a positioning satellite.
A car-navigation system for estimating whether a vehicle travels an upper or lower road of a multilayer road, comprising;
- means for allocating comparison coefficients to a plurality of judgment conditions;
- and
- means for estimating whether a vehicle travels on the upper or lower road of a multilayer road based on a stun of comparison coefficients, wherein at least one of the plurality of judgment conditions relates to a history of vehicle speed.
A car-navigation system for determining the estimated position of a vehicle, comprising:
- reception means for receiving at least one electric wave from a plurality of positioning satellites;
- and
- control means for allocating comparison coefficients based on an angle of elevation to the received satellite, and judging the estimated position of a vehicle based on a sum of the comparison coefficients.
A car-navigation system for determining an estimated position of a vehicle, comprising:
- a first judgment means for judging expressway predominant as the estimated position;
- a second judgment means for judging ordinary road predominant as the estimated position;
- and
- control means for determining the vehicle estimated position based on the judgment results of the first and second judgment means.
A storage medium having a built-in program for determining an estimated position of a vehicle, comprising:
- a first judgment for judging expressway predominant as the estimated position;
- a second judgment for judging ordinary road predominant as the estimated position;
- and
- a built-in program for determining the vehicle estimated position based on the judgment results of the first and second judgments.
Dependencies are inferred from the claim text.