Navigation system
First Claim
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1. A navigation system for a vehicle, the system comprising:
- a position detector configured to detect a current position of the vehicle;
a map data storage unit configured with a computer readable storage medium to store road map data;
a route designating unit configured to designate a guide route to a destination based on the road map data and the current position;
a route guide unit configured to output a guide to indicate a route for the vehicle to take at a guide-target branch point, which is a target for the guide on a guide route, when the vehicle approaches the guide-target branch point;
a state storage unit configured to store states of route-deviated branch points, each route-deviated branch point being a branch point at which the vehicle deviated from a guide route in a past, the state of each route-deviated branch point including at least one state item of;
(i) a configuration of the each route-deviated branch point;
(ii) a relationship with a neighboring branch point; and
(iii) a road environment arising when entering the each route-deviated branch point;
a similarity determining unit configured to determine whether a state of the guide-target branch point, which is obtained from the road map data stored in the map data storage unit, is similar to one of the states of the route-deviated branch points, which are stored in the state storage unit, by comparing with respect to the at least one state item, the guide-target branch point being a different point than the route-deviated branch points;
a guide change unit configured to change a manner of a guide at the guide-target branch point by adding a guide for preventing deviation from the guide route when the state of the guide-target branch point is determined to be similar to the one of the stored at least one state items of the route-deviated branch points, in comparison with a case when the at least one state item of the guide-target branch point is determined to be not similar to any one of the stored at least one state items of the route-deviated branch points; and
a deviation determining unit configured to determine whether the vehicle deviates from a guide route at a branch point intentionally or mistakenly, wherein the state storage unit stores a state of the branch point when the deviation determining unit determines that the vehicle deviates from the guide route at the branch point mistakenly instead of intentionally,the deviation determining unit being further configured to determine that the vehicle has deviated from a guide route mistakenly instead of intentionally in one of conditions associated(i) when the vehicle deviates from the guide route to depart from the guide route,(ii) when the vehicle deviates from the certain guide route and then a guide route, which has a longer distance b a predetermined distance than the certain guide route, is designated,(iii) when the vehicle deviates from the guide route and enters a road corresponding to an alley in case each road in the road map data has a road type at least including a type of an alley,(iv) when the vehicle deviates from the guide route and then changes a heading direction to a reversed direction, and(v) when the vehicle deviates from the guide route and then returns to the guide route, andthe deviation determining unit being further configured to determine that the vehicle has deviated from a guide route intentionally in a condition associated when the vehicle deviates from the guide route and stops at a position excluding the destination and passing points included in the guide route.
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Abstract
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.
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Citations
22 Claims
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1. A navigation system for a vehicle, the system comprising:
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a position detector configured to detect a current position of the vehicle; a map data storage unit configured with a computer readable storage medium to store road map data; a route designating unit configured to designate a guide route to a destination based on the road map data and the current position; a route guide unit configured to output a guide to indicate a route for the vehicle to take at a guide-target branch point, which is a target for the guide on a guide route, when the vehicle approaches the guide-target branch point; a state storage unit configured to store states of route-deviated branch points, each route-deviated branch point being a branch point at which the vehicle deviated from a guide route in a past, the state of each route-deviated branch point including at least one state item of; (i) a configuration of the each route-deviated branch point; (ii) a relationship with a neighboring branch point; and (iii) a road environment arising when entering the each route-deviated branch point; a similarity determining unit configured to determine whether a state of the guide-target branch point, which is obtained from the road map data stored in the map data storage unit, is similar to one of the states of the route-deviated branch points, which are stored in the state storage unit, by comparing with respect to the at least one state item, the guide-target branch point being a different point than the route-deviated branch points; a guide change unit configured to change a manner of a guide at the guide-target branch point by adding a guide for preventing deviation from the guide route when the state of the guide-target branch point is determined to be similar to the one of the stored at least one state items of the route-deviated branch points, in comparison with a case when the at least one state item of the guide-target branch point is determined to be not similar to any one of the stored at least one state items of the route-deviated branch points; and a deviation determining unit configured to determine whether the vehicle deviates from a guide route at a branch point intentionally or mistakenly, wherein the state storage unit stores a state of the branch point when the deviation determining unit determines that the vehicle deviates from the guide route at the branch point mistakenly instead of intentionally, the deviation determining unit being further configured to determine that the vehicle has deviated from a guide route mistakenly instead of intentionally in one of conditions associated (i) when the vehicle deviates from the guide route to depart from the guide route, (ii) when the vehicle deviates from the certain guide route and then a guide route, which has a longer distance b a predetermined distance than the certain guide route, is designated, (iii) when the vehicle deviates from the guide route and enters a road corresponding to an alley in case each road in the road map data has a road type at least including a type of an alley, (iv) when the vehicle deviates from the guide route and then changes a heading direction to a reversed direction, and (v) when the vehicle deviates from the guide route and then returns to the guide route, and the deviation determining unit being further configured to determine that the vehicle has deviated from a guide route intentionally in a condition associated when the vehicle deviates from the guide route and stops at a position excluding the destination and passing points included in the guide route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21)
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17. A route guide method in a navigation system for a vehicle, the navigation system including:
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a position detector configured to detect a current position of the vehicle; a map data storage unit configured with a computer readable storage medium to store road map data; a route designating unit configured to designate a guide route to a destination based on the road map data and the current position; and a route guide unit configured to output guide to indicate a route for the vehicle to take at a guide-target branch point, which is a target for the guide on a guide route, when the vehicle approaches the guide-target branch point, the method comprising; storing states of route-deviated branch points, each route-deviated branch point being a branch point at which the vehicle deviated from a guide route in a past, the state of each route-deviated branch point including at least one state item of (i) a configuration of the each route-deviated branch point; (ii) a relationship with a neighboring branch point; and (iii) a road environment arising when entering the each route-deviated branch point; determining whether at least one state item of a guide-target branch point, which is a target for a guide on a guide route, is similar to one of the stored at least one state items of the route-deviated branch points by comparing with respect to the at least one slate item, when the vehicle approaches the guide-target branch point, the guide-target branch point being a different point than the route-deviated branch points; and changing a manner of a guide being outputted by the route guide unit at the guide-target branch point by adding a guide for preventing deviation from the guide route when the at least one state item of the guide-target branch point is determined to be similar to the one of the at least one state items of the route-deviated branch points, in comparison with a case when the at least one state item of the guide-target branch point is determined to be not similar to any one of the at least one state items of the route-deviated branch points; and determining whether the vehicle deviates from a guide route at a branch point intentionally or mistakenly, wherein a state of the branch point is stored newly when it is determined that the vehicle deviates from the guide route at the branch point mistakenly instead of intentionally, wherein it is determined that the vehicle has deviated from a guide route mistakenly instead of intentionally in one of conditions associated (i) when the vehicle deviates from the guide route to depart from the guide route, (ii) when the vehicle deviates from the certain guide route and then guide route, which has a longer distance by a predetermined distance than the certain guide route, is designated, (iii) when the vehicle deviates from the guide route and enters a road corresponding to an alley in case each road in the road map data has a road type at least including a type of an alley, (iv) when the vehicle deviates from the guide route and then changes a heading direction to a reversed direction, and (v) when the vehicle deviates from the guide route and then returns to the guide route, and wherein it is determined that the vehicle has deviated from a guide route intentionally on a condition associated when the vehicle deviates from the guide route and stops at a position excluding the destination and passing points included in the guide route. - View Dependent Claims (22)
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Specification
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Current AssigneeDENSO Corporation, Denso IT Laboratory, Inc. (DENSO Corporation)
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Original AssigneeDENSO Corporation, Denso IT Laboratory, Inc. (DENSO Corporation)
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InventorsSuzuki, Takamitsu, Mizuno, Nobuhiro, Oumi, Masanori, Hara, Kousuke, Iwasaki, Hirotoshi
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Primary Examiner(s)MUSTAFA, IMRAN K
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Application NumberUS11/546,566Publication NumberTime in Patent Office1,335 DaysField of Search701/200, 701/201, 701/205, 701/207, 701/208, 701/209, 701/210, 701/211, 701/213, 340/995.2, 340/995.21, 340/995.22, 340/995.1US Class Current701/211CPC Class CodesG01C 21/3641 Personalized guidance, e.g....
