Denso Corporation

Denso It Laboratory, Inc.

Masanori Oumi

Takamitsu Suzuki

Nobuhiro Mizuno

Hirotoshi Iwasaki

Kosuke Hara

Kousuke Hara

Seiji Kato

A route calculation device is disclosed. The route calculation device sets a recommended route leading from a departure point through via-points and sets an order of the via-points in the recommended route, through: (1) calculating multiple optimum routes from an origin point of a departure side route to multiple unarranged via-points and selecting one unarranged via-point that constitutes one optimum route that has minimum cost among the multiple optimum routes; (2) determining the place of the one unarranged via-point in the order so that the recommended route passes through the one unarranged via-point one via-point later than the origin point, adding the one optimum route to the departure side route, and setting the origin point to the one unarranged via-point; and (3) calculating, when the number of unarranged via-points becomes one, the optimum route between the origin point and the last one unarranged via-point.

Route calculation device, navigation apparatus and computer readable medium

A navigation system for providing a destination of a trip and for use in a vehicle includes a position detector for detecting a current position of the vehicle, a condition detector for detecting a combination of a plurality of predetermined vehicle conditions when the vehicle is stopping at a stop location, a first determination unit for determining that the stop location is one of a stop-by place of the trip and the destination of the trip based on the combination of the plurality of the predetermined vehicle conditions detected by the condition detector, a storage unit for storing at least the destination of the trip based on a determination result by the first determination unit and an information provision unit for providing destination information regarding the trip at least based on the destination stored in the storage unit.

Navigation system

When a vehicle deviates from a guide route at a first branch point, the state of the first branch point is memorized. Afterward, when a second branch point becomes a target for a route guide and the state of the second branch point is similar to the memorized state, a user of the vehicle is provided with a guide for preventing deviation from the guide route at the second branch point with a manner of the guide changed. This procedure allows learning of tendency of the user with respect to a state apt to cause the user to mistake a guide route. A guide to help prevent a user from deviating from a guide route at a branch point can be thus performed appropriately.

A navigation system, having a route calculation unit for providing a navigation route from a start point to a destination based on an evaluation of a plurality of cost parameters by an evaluation function, includes a storage unit for storing a weighting factor determination relation for determining a weighting factor of the cost parameter based on a travel situation of predetermined type identified in a specific length of time and a weighting factor determination unit for determining the weighting factor based on the weighting factor determination relation and the travel situation derived from an actual state of traveling.

Navigation system and program for controlling the same

A vehicle travel-route guidance apparatus. The apparatus includes a map-storing device having internal intersection information that is furnished for executing a right-hand turn or a left-hand turn to bypass an intersection. The guidance apparatus further includes a device that determines whether searched links or nodes have internal intersection information associated therewith, either during, or after, link/node cost evaluation during a destination route search by the control unit. The guidance apparatus also includes a device for relatively changing an evaluation value of the link/node to preferentially include the link/node in a destination route when the control unit searches for a destination route by evaluation-value calculation, thereby ensuring that the most desirable destination route is chosen.

Growing community of inventors

Gifu, Japan

Masanori Oumi