JP2002013939A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device capable of searching a guiding course including a road through which an own vehicle has passed before, even if the road is not stored in a storage medium such as a DVD-ROM. SOLUTION: A deviation point IP at which the own vehicle deviates from a road RD is detected by a vehicle position measuring instrument, and the point is stored in a memory. After passing through a newly opened road NR, a return point OP at which the vehicle returns to the road RD is detected by the measuring instrument and also this point is stored in the memory in association with the deviation point IP. Later on, when a user sets a destination and this navigation device computes a guiding course from a start point SP to the destination GP, it performs course search processing in consideration of the course connecting the deviation point IP to the return point OP stored in the memory. If the use of the course connecting the deviation point IP to the return point OP is determined to enable an efficient guiding course to be computed, it computes a guiding course RT including the course connecting the deviation point IP to the return point OP.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device, and more particularly, to a navigation device that performs a route search including unregistered roads that are not registered in map data during a route search.

[0002]

2. Description of the Related Art A navigation device that guides a vehicle so that a user can reach a desired destination detects a position of the vehicle and stores map data around the vehicle position from a storage medium such as a DVD-ROM. Is read, a map image is drawn on the display screen based on the read map data, and a vehicle position mark is drawn so as to overlap a predetermined position on the map image. Then, a guidance route to a destination set by the user is calculated based on the map data, and the guidance route is displayed so as to be superimposed on a road on the map screen.

[0003]

However, in a conventional navigation device, a newly opened road is a DV road.
Since it is not stored in a storage medium such as a D-ROM, a newly opened road cannot be used when searching for a route,
It was inconvenient. Accordingly, the object of the present invention is to provide a DVD-RO
An object of the present invention is to provide a navigation device capable of searching for a guide route including a road that has not been recorded in a storage medium such as M, even if the road has been passed by the own vehicle.

[0004]

The above object is achieved by a navigation device that sets a desired point as a destination, searches for a guidance route to the destination, and guides a vehicle along the guidance route. Detecting means for detecting a point where the vehicle has deviated and returned from the road on the screen, storage means for storing the deviating point and the returning point detected by the detecting means, and when a guidance route search to the destination is instructed And a guidance route searching means for searching for a guidance route in consideration of the departure point and the return point stored in the storage means. Further, the guidance route searching means is achieved by performing a route search by regarding a route from a departure point to a return point stored in the storage means as a straight line when searching for a guidance route.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (A) Schematic Description of the Present Invention FIG. 1 is a schematic explanatory diagram of the present invention, in which a guidance route to a destination set by a user is determined in consideration of a departure point IP and a return point OP. It is a display example at the time of searching. DP is the display screen of the navigation device, RD is the road on the map image drawn on the display screen DP, CM is the vehicle position mark indicating the current position of the vehicle, and NR is newly opened and not stored in the map data. Newly opened road, RT is the guidance route calculated by the navigation device, SP is the starting point, GP is the destination, I
P is a departure point that deviates from the road RD, and OP is a return point that has returned to the road RD. First, a departure point IP where the vehicle deviates from the road RD is detected by a vehicle position measuring device, and the point is stored in a memory, and then the return point OP which has passed the newly opened road NR and returned to the road RD is also measured. The point is detected by the device, and the point is stored in the memory of the navigation device in advance so as to correspond to the departure point IP. Thereafter, when the user sets a desired destination, the navigation device calculates a guidance route from the departure point SP to the destination GP by using a route connecting the departure point IP and the return point OP stored in the memory. When it is determined that a route that connects the departure point IP and the return point OP can be calculated more efficiently by using the route that connects the departure point IP and the return point OP, the route that connects the departure point IP and the return point OP is determined. Calculate the included guidance route RT.

(B) Embodiments of the Present Invention (a) Configuration of Navigation Device of the Present Invention FIG. 2 is a configuration diagram of a navigation device of the present invention. In the figure, reference numeral 11 denotes a map storage medium for storing map information, for example, a DVD-ROM, 12 a DVD-ROM control unit for controlling reading of map information from the DVD-ROM 11, and 13 a vehicle position for measuring a current vehicle position. It is a measuring device, and includes a vehicle speed sensor for detecting a moving distance, an angular velocity sensor for detecting a moving direction, a GPS receiver, a position calculation CPU, and the like. Reference numeral 14 denotes a map information memory for storing map information read from the DVD-ROM 11, reference numeral 15 denotes a menu selection operation key, an enlargement / reduction operation key, a manual map scroll key, a departure point from a road, and a return point to a road. Is a remote control having a registration start / end key and the like, and 16 is a remote control interface.

[0007] Reference numeral 17 denotes a processor (CPU) for controlling the entire navigation apparatus, and 18 denotes an RO for storing various programs such as a departure point / return point detection program, a departure point / return point registration program, and a guide route search program.
M and 19 are RAs for storing processing results of various programs.
M and 20 departure points storing departure points and return points registered by the departure point / return point registration program.
Return point storage unit, 21 is a map image generation unit that generates a map image, 22 is a video RAM that stores the map image generated by the map image generation unit 21, 23 is a menu image generation unit that generates various menu images, and 24 is It is a guidance route generation unit, and uses the processing result of the guidance route search processing program stored in the RAM 19. Reference numeral 25 denotes a mark generating unit such as a vehicle position mark, 26 denotes an image synthesizing unit that synthesizes and outputs various images, 27 denotes a display device that displays images output from the image synthesizing unit, and 28 denotes a bus.

(B) Departure point / return point data configuration FIG. 3 shows an example of the configuration of departure point / return point data stored in the departure point / return point storage unit. For example, the pointer 1 stores the coordinates of the departure point A and the coordinates of the return point A ′ corresponding to the departure point A.

(C) Flowchart of an embodiment of the present invention (c-1) Flowchart of manual registration of a departure point and a return point FIG. 4 is a flowchart of an embodiment of the present invention. This is a case in which the return point is manually registered. First, the CPU 17 determines whether or not a registration start key (not shown) of the remote controller 15 has been pressed (step 101). If the registration start key has not been pressed, no processing is performed. On the other hand, when the registration start key is depressed, the vehicle position information from the vehicle position
According to the departure point / return point detection program stored in the OM 18, the CPU 17 determines that the own vehicle position is the DVD-ROM 1
It is determined whether the vehicle has deviated from the road stored in No. 1 (step 102). When it is determined that the vehicle has deviated, the coordinates of the departure point are stored in the departure point / return point storage unit 20 (step 103). When it is determined that the vehicle position does not deviate from the road, the registration operation is invalid. Then, the processing is terminated (step 104).

Next, the CPU 17 determines whether or not a registration end key (not shown) of the remote controller 15 has been pressed (step 105). If the key has not been pressed, the process of step 105 is repeated. On the other hand, when the registration end key is depressed, the CPU 17 uses the vehicle position information from the vehicle position measuring device 13 to execute the departure point / return point detection program stored in the ROM 18 so that the CPU 17 determines that the vehicle position is a DVD.
-It is determined whether or not the vehicle has returned to the road stored in the ROM 11 (step 106). When it is determined that the vehicle has returned, the coordinates of the return point are stored in the departure point / return point storage unit 20 (step 107), and when it is determined that the own vehicle position has not returned to the road, the process of step 104 is performed.

(C-2) Flowchart of Automatic Registration of Departure Point and Return Point FIG. 5 is a flowchart of an embodiment of the present invention, in which a deviation point from a road and a return point to a road are automatically registered. is there. First, the CPU 17 controls the vehicle position measuring device 13.
It is determined whether the vehicle position has deviated from the road stored in the DVD-ROM 11 by the departure point / return point detection program stored in the ROM 18 using the vehicle position information from the vehicle (step 201). If it is determined that the vehicle position does not deviate from the road, the process ends. On the other hand, when it is determined that the vehicle has deviated, the coordinates of the departure point are stored in the departure point / return point storage unit 20 (step 20).
2). Next, using the vehicle position information from the vehicle position measuring device 13, the CPU 17 determines that the own vehicle position is the DVD-R by the departure point / return point detection program stored in the ROM 18.
It is determined whether or not the vehicle has returned to the road stored in the OM 11 (step 203). When it is determined that the vehicle has returned, the coordinates of the return point are stored in the departure point / return point storage unit 20 (step 204), and when it is determined that the own vehicle position has not returned to the road, the processing of step 203 is continued. .

(C-3) Flowchart of Searching for Guidance Route Considering Departure Point and Return Point FIG. 6 is a flowchart of an embodiment of the present invention, in which a guidance route is searched in consideration of departure point and return point. . First, the CPU 17 determines whether or not a destination has been set from the guidance route search program stored in the ROM 18 (step 301). If no destination has been set, the process ends. On the other hand, when the destination has been set, the guidance route search is started using the guidance route search program (step 302). Next, it is determined whether or not the use of the point stored in the departure point / return point storage unit 20 during the route search to the destination can generate a more efficient guidance route (step 303). If it is determined that the use of the points stored in the return point storage unit 20 results in poor efficiency, a normal guidance route is calculated (step 304). On the other hand, when it is determined that the use of the point stored in the departure point / return point storage unit 20 requires a more efficient guidance route, the point stored in the departure point / return point storage unit 20 is determined. The used guidance route is calculated (step 305), and route guidance to the destination is started (step 306). It should be noted that, when the present invention is used to calculate a guidance route for returning from the destination to the departure point, a one-way route is also conceivable.

[0013]

As described above, according to the present invention, a desired point is set as a destination, a guidance route to the destination is searched,
In a navigation device for guiding a vehicle along the guidance route, a detecting means for detecting a point where the vehicle deviates and returns from a road on a map screen, and a storage for storing the deviating point and the return point detected by the detecting means Means and a guidance route searching means for searching for a guidance route in consideration of a departure point and a return point stored in the storage means when a guidance route search to a destination is instructed. It is possible to obtain an efficient and optimal guide route connecting a departure point and a return point of a road that is a shortcut to the destination where the vehicle has passed. Further, according to the present invention, the guidance route searching means performs the route search by regarding the route from the departure point to the return point stored in the storage means as a straight line when searching for the guidance route. Have done
An efficient and optimal guide route connecting the departure point and the return point of a road that is a shortcut to the destination can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of the present invention.

FIG. 2 is a configuration diagram of a navigation device of the present invention.

FIG. 3 is a data configuration of a departure point / return point storage unit.

FIG. 4 is a flowchart in a case where a departure point / return point is manually registered.

FIG. 5 is a flowchart in a case where a departure point / return point is automatically registered.

FIG. 6 is a flowchart of a guide route search in consideration of a departure point and a return point.

[Explanation of symbols]

 DP · · · display screen NR · · · newly opened road not stored in the map data IP · · · departure point OP · · · return point RT · · guide route SP · · · departure point GP · · · destination

Claims (2)

[Claims] 1. A navigation device that sets a desired point as a destination, searches for a guidance route to the destination, and guides the vehicle along the guidance route. Detecting means for detecting a return point, storing means for storing a departure point and a return point detected by the detecting means, and stored in the storing means when a search for a guidance route to a destination is instructed. A navigation device comprising: guidance route searching means for searching for a guidance route in consideration of a departure point and a return point. 2. The navigation device according to claim 1, wherein said guidance route searching means performs a route search by assuming a route from a departure point to a return point stored in said storage device as a straight line when searching for a guidance route. Navigation device.