JP4197274B2 - Navigation device with dead end warning function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device, and more particularly to a navigation device having a dead end warning function that outputs a warning before a dead end passage.
[0002]
[Prior art]
There is a navigation device that gives a warning such as “This destination is a dead end” by voice and a screen when the end of the passage to be entered is a dead end (Patent Document 1). FIG. 5 is an explanatory diagram of a warning function of a navigation device having such a dead end warning function. In the state where the route guidance function is off, the navigation device checks the connection state of the road link ahead of the vehicle, and when the path connection state is interrupted, that is, when a dead end passage (bag path) BLA is detected, the vehicle detects the dead end passage. When approaching the entrance C, a warning function such as “It is a dead end when going straight ahead at this intersection” or “It is a dead end when this intersection is turned to the left” is output with a voice and displayed on the screen to notify the user. According to this dead end warning, there is an effect that the user can be prevented from accidentally stopping and entering the passage.
[Patent Document 1]
JP-A-10-260054 gazette
[Problems to be solved by the invention]
By the way, there may be a destination (home, friend's house, shop, etc.) where the driver is going to go ahead of the dead end passage. In such a case, if a dead end warning is always issued, it is noisy and offended. For this reason, it is desirable not to issue a warning when there is a destination that the driver is going to go ahead of the dead end passage.
From the above, it is an object of the present invention to prevent a dead end warning when a certain point in the dead end passage has been performed before.
Another object of the present invention is to prevent a dead end warning when a certain point in the dead end passage is set as a registered point.
[0004]
[Means for Solving the Problems]
According to the present invention, there is a warning that a dead end judging means for judging whether the end of the passage is a dead end, a means for registering the dead end passage as an approach dead end passage, or a dead end passage when entering the dead end passage. Warning means,
If the dead end passage is not an approach dead end passage, a warning is output before the dead end passage, and if the dead end passage is an entrance dead end passage, this is achieved by a navigation device including a control unit that controls not to output a warning.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic explanatory diagram of the present invention. In (A), when no point has been reached in any point in the dead end passage BLA or there is no registered point in the dead end passage BLA, the vehicle MYC When you approach the dead end passage BLA entrance ET, or when you try to enter the dead end passage BLA, "If you go straight ahead at the next intersection, you will have a dead end." Etc. are output by voice.
[0007]
In (B), when the CD shop in the dead end passage BLA is registered as a spot, even if the vehicle MYC approaches the entrance ET of the dead end passage BLA or enters the dead end passage BLA, no dead end warning is issued.
In (C), when a certain point (acquaintance's house) A in the dead end passage BLA is entered as the destination, the dead end passage is registered as an approach dead end passage. And when the vehicle MYC approaches the entrance ET of the dead end passage BLA, or when trying to enter the dead end passage BLA, if the dead end passage BLA is not registered as an approach dead end passage, a dead end warning is issued, If it is registered as an approach dead end passage, no dead end warning is issued.
[0008]
FIG. 2 is a configuration diagram of a navigation apparatus having a dead end warning function according to the present invention.
Map data is recorded on a map recording medium (CD-ROM, DVD, etc.) 1 and can be read as necessary. Map data includes road layers used for guided route search and map matching, background layers for displaying objects on the map, character layers for displaying characters such as city names on the map, and IIS layers for storing IIS information. Etc.
[0009]
FIG. 3 is a configuration diagram of a road layer, which has road link data RLDT, node data NDDT, and intersection data CRDT. The road link data RLDT gives attribute information of the corresponding road. The total number of nodes of the road link, each node number constituting the road, road number (road name), road type (national road, expressway, prefectural road, etc. Etc.) and other data. The node data NDDT is a list of all nodes constituting the road. Each node has position information (latitude and longitude), an intersection identification flag indicating whether or not the node is an intersection, and intersection data if the node is an intersection. If it is not an intersection, it is composed of a pointer pointing to the road to which the node belongs. The intersection data CRDT includes, for each intersection on the map, (1) a set of other end nodes (intersection constituting nodes) of the intersection constituting link connected to the intersection, and (2) whether the intersection is a dead end entrance intersection. A dead end flag F _BLA indicating (3) has a node number N _BLA of the other end node on the dead end passage at the entrance intersection of (3) dead end passage.
[0010]
Returning to FIG. 2, the operation unit 2 is provided with various operation keys for operating the navigation apparatus body 10. The GPS receiver 3 receives position information transmitted from a GPS satellite and measures the current position of the vehicle. The self-contained navigation sensor 4 includes an angle sensor 4a such as a gyro that detects a vehicle rotation angle, and a travel distance sensor 4b that generates a pulse for every predetermined travel distance, and can autonomously measure the current position of the vehicle. ing. The navigation device measures the current position of the vehicle using both GPS and autonomous navigation. The display unit 7 displays a vehicle periphery map, a guidance route, a vehicle position mark, other guidance information and a menu in accordance with an instruction from the navigation device 10.
[0011]
In the navigation device 10, the map buffer 11 temporarily stores map data read from the map recording medium. The control unit 15 detects the current position of the vehicle based on various information input via the interfaces 12 to 14, reads map data around the vehicle into a buffer, searches for a guidance route, and performs map matching processing. Or do. The map drawing unit 17 generates a map image using the map data read to the map buffer 11 and writes it to the VRAM 18, and the image reading unit 19 cuts out a predetermined image portion from the VRAM 18 in accordance with an instruction from the control unit 15. To the image composition unit 24. The control unit 15 scrolls the map image by switching the map image written in the VRAM 18 or controlling the image cutout position in the VRAM 18 by the image reading unit 19.
[0012]
The guidance route memory 20 records the guidance route information to the destination searched by the control unit 15, that is, the position data of all the nodes constituting the guidance route from the departure point to the destination. The guide route drawing unit 21 generates a guide route image using the guide route information, inputs it to the image composition unit 24, and highlights it on the drawing map. The operation screen generation unit 22 generates various menu screens (operation screens) and inputs them to the image composition unit 24, and the mark generation unit 23 generates various marks such as a vehicle position mark and a cursor and inputs them to the image composition unit 24. . The image composition unit 24 superimposes various marks generated by the mark generation unit 23 on the map image read from the VRAM 18, the operation screen generated by the operation screen generation unit 22, the guide route drawn by the guide route drawing unit 21, and the like. Display on the display device 7. The audio output unit 25 generates an audio signal corresponding to the signal input from the control unit 15 and outputs it from the speaker 26. Output sound includes (1) guidance sound for turning left / right when approaching an intersection during guidance route guidance, and (2) dead end warning when approaching a dead end passage or trying to enter a dead end passage. There are voices.
[0013]
In the point registration memory 27, the name and position of the point set by the registration operation are stored. By registering the point, the destination setting operation can be facilitated, or a flag can be set on the registered point to help select the traveling direction. The approach dead end passage registration memory 28 registers the dead end passage as an already entered dead end passage when entering the dead end passage (bukurokoji), for example, home, acquaintance's house, shop, etc. in the dead end passage. When entering the dead end passage to go to, the entrance intersection number of the dead end passage is recorded in the entry dead end passage registration memory 28, so that the dead end passage is registered as the entry dead end passage.
[0014]
FIG. 4 is a dead end warning process flow of the present invention.
When approaching the intersection, the control unit 15 refers to the map data and checks whether the intersection is a dead end passage intersection (step 101).
If it is not a dead-end passage entrance intersection, the process is terminated. However, if it is an entrance intersection of a dead end passage, the dead end passage is identified with reference to N _BLA , and the point registration memory 27 is referred to to check whether there is a registered point in the dead end passage (step 102). ). If there is a registered point, it is assumed that the target place exists in the dead end passage, and the process is terminated without giving a dead end warning.
On the other hand, if there is no registration point, it is checked whether the entrance intersection of the dead end passage is registered in the approach dead end passage registration memory 28 (step 103). If registered, since it has entered the dead end passage in spite of the dead end warning in the past, it is assumed that the target place exists in the dead end passage, and the process is terminated without warning of the dead end. .
[0015]
However, if the entrance intersection of the dead end passage is not registered in the entrance dead end passage registration memory 28, it is determined whether the vehicle turns right / left or straight ahead when entering the dead end passage, and “It is a dead end when going straight ahead at the intersection”, or A warning such as “It is a dead end when turning to the left (right) after this intersection” is output with a voice and displayed on the screen to inform the user (step 104).
Next, it is checked whether or not the vehicle has entered the dead end passage despite the above dead end warning (step 105). If it does not enter, the processing is terminated. If it enters, the entrance dead end passage registration memory 28 (FIG. 2) The intersection number is registered (step 106), and the process is terminated.
[0016]
In the above, the processing of FIG. 4 was performed when approaching the intersection, but in step 101, the direction of travel is identified with a turn signal etc., and it is determined whether the direction of travel is a dead end passage. It is also possible to configure to perform the processing after 102.
Further, the above is a case where a dead end warning is not issued if either of (1) a registered point exists in the dead end passage or (2) the vehicle has entered the dead end passage. However, as a modified example, it is possible to configure so that a dead end warning is immediately issued if the condition (1) is not satisfied, that is, if there is no registered point, without considering the condition (2).
Similarly, if the condition (1) is not considered and the condition (2) is not satisfied, that is, if the vehicle has not entered the dead-end passage, a dead-end warning can be immediately issued. .
In addition, in the above, the dead end flag F _BLA etc. is given to the intersection data CRDT so that the dead end entrance can be identified, but such a flag is not prepared, the connection state of the link is traced, and the link is disconnected. It can also be configured to detect and identify a dead end path.
[0017]
【The invention's effect】
As described above, according to the present invention, since the dead end warning is issued, it is possible to prevent the dead end passage from being entered by mistake.
Also, according to the present invention, if there has been a certain point in the dead end passage before, no dead end warning is given, or if a certain point in the passage is set as a registration point, Since the dead end warning is not issued, it is possible to prevent the dead end warning from being issued every time even if there is a place that is frequently visited, such as a home or an acquaintance's house, in the passage.
[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 apparatus having a dead end warning function according to the present invention.
FIG. 3 is a configuration diagram of a road layer.
FIG. 4 is a dead end warning process flow of the present invention.
FIG. 5 is an explanatory diagram of a warning function of a navigation device having a conventional dead end warning function.
[Explanation of symbols]
BLA Dead End Passage (Fucked alley)
ET Dead end passage entrance
MYC vehicle

Claims (1)

In a navigation device with a dead end warning function that outputs a warning in front of a dead end passage,
A dead end determining means for determining whether the end of the passage is a dead end,
Means for registering the dead end passage as an approach dead end passage when entering the dead end passage;
Warning means to warn that it is a dead end passage,
A control unit that outputs a warning before the dead end passage if the dead end passage is not an approach dead end passage, and that does not output a warning if the dead end passage is an entrance dead end passage,
A navigation device provided with a dead end warning function.

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