JP2009085613A - Navigation system and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform guidance in such a way that a vehicle body may not come into contact with a road side due to the difference between the tracks followed by front and back inner wheels when turning in the case of branching into a road having a narrow width relative to a vehicle size. <P>SOLUTION: A navigation system includes input means (1) for inputting a destination and the vehicle size; current position detection means (2) for detecting a current position of the vehicle; information storage means (3) for storing data required for route guidance including road data; route search means (4a) for reading the road data and searching for a route from the current position to the destination; traveling position detection means (7) for detecting a traveling position in a lane; determination means (4b) for determining whether a road after branching is narrow or not to the inputted vehicle size at a guidance branch point in the route; and control means (4c) for performing guidance about branching by an arrow display on an enlarged view of an intersection of a guidance screen at the guidance branch point. When the road after branching is determined as being narrow to the vehicle size and it is detected that the traveling position in the lane is close to the branching side from the center of the lane, the arrow display on the enlarged view of the intersection is displayed in such a way as to have bulges to the branching side and the opposite side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation device and a program for guiding a vehicle body so as not to come into contact with a road edge due to an inner wheel difference of a vehicle when branching to a narrow road.

Conventionally, an intersection that cannot make a right or left turn is searched in consideration of the width and length of the vehicle that influences the trafficability, the width of the road, the angle between the approach and exit of the intersection, etc. A navigation system has been proposed in which a route search is performed at a high search cost, and a route including an intersection that can be passed while avoiding an intersection where a right or left turn is impossible is guided (Patent Document 1).
JP 2006-177905 A

  According to the system of Patent Document 1, a route including only a trafficable intersection is guided. However, even if it is an intersection that can be passed, for example, if the vehicle is a large vehicle and the road at the branch destination is narrow, the vehicle body or the rear inner wheel may come into contact with the road edge due to the difference in the inner wheel. obtain.

The present invention is intended to solve the above-described problem. When the vehicle branches off to a road having a relatively narrow width compared to the vehicle size, the vehicle body is guided so as not to contact the road edge due to the difference in the inner ring of the vehicle. Objective.
The present invention provides a navigation device that searches for a route to a destination, displays the current position of the vehicle on a map on a guidance screen, and guides the input means for inputting the destination and the vehicle size, and the current position of the vehicle. Current position detection means for detecting, information storage means for storing data necessary for route guidance including road data, and road data in the information storage means are read, and a route from the current position to the input destination is searched. A route search means, a travel position detection means for detecting a travel position in the lane, a judgment means for judging whether or not a branch destination road at the guidance branch point in the route is narrow with respect to the inputted vehicle size, and a guidance branch point And a control means for guiding a branch by an arrow display on an enlarged cross-sectional view of the guidance screen, wherein the control means determines that the branch road is narrower than the vehicle size by the judging means. When the travel position detection means detects that the travel position in the lane is closer to the branch side from the center of the lane, the arrow display on the enlarged intersection view is displayed with a bulge on the side opposite to the branch side. It is characterized by that.
The present invention also provides a step of detecting a current position of a vehicle in a program for searching a route to a destination, and controlling a navigation device that displays and guides the current position of the vehicle on a map on a guidance screen, and information storage Reading road data of the means, searching for a route from the current position to the input destination, detecting a traveling position in the lane, branch destination road at the guide branch point in the route for the input vehicle size Step of determining whether the road is narrow, when it is determined that the branch road is narrow relative to the vehicle size, and it is detected that the driving position in the lane is closer to the branch side from the center of the lane, an arrow display on the enlarged intersection map is displayed And causing the computer to execute a step of displaying the bulge on the side opposite to the branch side.

  In the present invention, when the vehicle branches to a road having a relatively narrow width compared to the size of the vehicle, the vehicle is guided so as to branch while paying attention to the difference between the inner wheels of the vehicle. Can be prevented.

Embodiments of the present invention will be described below.
FIG. 1 is a diagram illustrating an example of a navigation device according to the present embodiment. Input device 1 comprising a keyboard, mouse, touch panel, operation keys, etc. for inputting information such as departure and destination, vehicle size, current position detection device 2 for detecting information relating to the current position of the vehicle, map data, road data, Intersection data, navigation data necessary for route search, display / speech guidance data necessary for route guidance, and map display, route search, voice guidance, and other programs (application and / or OS) The information storage device 3 storing the information, the road data of the information storage device is read, the route search means 4a for searching the route from the current position to the input destination, and the guidance branch in the route for the input vehicle size Judgment means 4b for judging whether or not the branch destination road at the point is narrow. The control means 4c is provided for guiding the road branching and guiding the vehicle so that it travels along the guidance branch point while paying attention to the difference between the inner wheels, and as the navigator processing means, display / audio necessary for map display processing, route search processing, route guidance Central processing unit 4 that performs guidance processing, and further controls the entire system, for example, information related to vehicle travel, such as road information and traffic information, detection of information related to the current position of the vehicle, and information related to the current position An information transmission / reception device 5 for transmitting and receiving information, a display and speaker for outputting information on route guidance, and other output devices 6, and a camera 7 for photographing and detecting whether the vehicle traveling position in the traveling lane is left, right, or center It is composed of Here, the in-vehicle navigation device is equipped with an information storage device, a route search means, etc., but the information storage device, the route search means, etc. are provided not on the vehicle side but on the center side for distributing information. May be requested to acquire map data, road data, and a searched route.

FIG. 2 is a diagram for explaining a route guidance processing flow considering the inner ring difference.
Automobiles with four or more wheels generally turn the curve by giving a steering angle to the front wheels, and when looking at the wheel (inner ring) on the rotation center side, the rear inner wheel moves inside the curve from the front inner wheel, so-called inner wheel difference Occurs. The difference between the inner wheels becomes relatively larger when the turning radius is made smaller, and becomes larger as the wheel base (distance between the axles of the front and rear wheels) becomes longer. Due to the difference between the inner rings, there may be a case where what is avoided at the position of the front inner ring is inevitably collided at the position of the rear inner ring when turning right or left. In the present embodiment, when traveling on a route, when turning right or left at a guidance branch point, a situation in which the vehicle collides with a road edge due to an inner ring difference does not occur.

  FIG. 2 shows the guidance process after the route search has already been performed. First, the vehicle size is input and the vehicle size is recognized (steps S1 and S2). Whether the rear inner wheel contacts the road edge due to the difference between the inner wheels when turning left or right is a relative problem of the vehicle size, particularly the wheel base and the width of the road that branches off. Therefore, for example, as shown in FIG. 3, a screen for selecting the size of the vehicle such as a large car, a medium car, and a small car is presented and the driver selects it. When there is no selection of a driving vehicle, it recognizes as a medium size vehicle, for example. Next, the travel position in the travel lane is detected by the camera 7 (step S3). For example, when turning left, if the vehicle travel position in the lane is on the right side, the turning radius of the curve when turning left can be increased so that the inner wheel difference is reduced and the rear inner wheel is prevented from contacting the road edge. Can do. On the other hand, if the vehicle travel position is closer to the left side in the travel lane, the inner wheel is closer to the road edge, the turning radius when turning left is smaller, the inner wheel difference is larger, and the rear inner wheel may come into contact with the road edge. Is big. Therefore, the vehicle travel position in the travel lane is detected.

  Next, the road data in the information storage device 3 is referred to and it is determined whether or not the branch destination road of the guidance branch point is relatively narrow with respect to the input vehicle size (step S4). This determination is made by calculating the largest inner ring difference at the minimum rotation from the wheel base corresponding to the vehicle size. When it is determined that the branch road is narrow, it is determined whether the in-lane travel position is closer to the branch side from the center (step S5). As described above, if the traveling position in the lane is on the branch side, the rear inner ring is close to the road end, the turning radius at the time of branching is reduced, and the inner ring difference is also increased, so the rear inner ring contacts the road end. The potential is great. Therefore, as will be described in detail later, an inflated arrow is displayed on the enlarged intersection view, and voice guidance is provided so as to travel along the guidance branch point while paying attention to the inner ring difference (step S6). In step S4, when the branch road is not narrow with respect to the vehicle size, or when the in-lane travel position is not close to the branch side, normal guidance is performed (step S7).

  In the above processing, whether or not the branch road at the guidance branch point is narrow relative to the vehicle size is determined at the time of the route search, and a flag indicating that is given to the guidance branch point determined to be narrow. It is also possible to detect the travel position in the lane when the guide branch point with the flag is reached and perform the processing from step S5 to step S7.

Next, the arrow display on the intersection enlarged view at the guidance branch point will be described with reference to FIG.
When traveling on a route, when approaching a guidance branch, an enlarged view of the intersection is normally displayed on the guidance screen and an arrow is displayed to guide the branch. For example, as shown in FIG. 4A, when a left turn from the road 11 on one side of the lane to the road 12 at the guidance branch point 10 on the route, an arrow 20 is displayed from the current vehicle position 20 toward the road 12. And turn left. Even when the branch road 12 is relatively narrow compared to the vehicle size, if the vehicle travel position in the travel lane 11 is relatively close to the center line 13 side, the turning radius of the curve at the left turn can be increased, so that the inner ring A difference is also small and it can avoid that a rear inner ring contacts a road end. However, if the branch road 12 is narrow and the vehicle travel position is in the center of the travel lane 11 or on the left side of the travel lane 11, the inner ring is close to the road edge, and the turning radius when turning left becomes smaller and the difference between the inner rings becomes larger. Therefore, there is a high possibility that the rear inner ring contacts the road edge.

  Therefore, when the left turn road 11 is relatively narrow compared to the vehicle size and the vehicle travel position is closer to the left side from the center in the travel lane 11, as shown in FIG. 22 is displayed so as to inflate to the side opposite to the left turn road 11 (center line 13 side in the figure). The driver can avoid the rear inner wheel from coming into contact with the road edge by viewing the display and turning the vehicle position to the right side (center line 13 in the figure) and then turning left. At this time, further voice guidance is made so as to make a left turn while paying attention to the inner ring difference.

  In addition, although the example at the time of a left turn was demonstrated above, when a right turn road is narrow compared with vehicle size, since a rear inner ring may contact a road end by the inner ring difference on the right wheel side similarly, The arrow display on the enlarged map of the intersection is displayed inflated to the opposite side of the right turn road, and at the same time, voice guidance is given to make a right turn while paying attention to the inner ring difference.

It is a block diagram which shows the example of the navigation apparatus which concerns on this embodiment. It is a figure explaining the route guidance processing flow in consideration of the inner ring difference. It is a figure which shows the input screen of the size of a vehicle. It is a figure explaining the arrow display on an intersection enlarged view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Current position detection apparatus, 2 ... Control apparatus, 3 ... Information storage apparatus, 4 ... Central processing unit, 4a ... Route search means, 4b ... Judgment means, 4c ... Control means, 5 ... Information transmission / reception apparatus, 6 ... Output apparatus 7 ... Camera.

Claims (3)

In a navigation device that searches for a route to a destination and displays the current position of the vehicle on a map on the guidance screen,
An input means for inputting the destination and the vehicle size;
Current position detecting means for detecting the current position of the vehicle;
Information storage means storing data necessary for route guidance including road data;
Route search means for reading the road data of the information storage means and searching for a route from the current position to the input destination;
Traveling position detecting means for detecting a traveling position in the lane;
A determination means for determining whether or not the branch road at the guidance branch point in the route is narrow with respect to the input vehicle size;
Control means for guiding a branch by an arrow display on the intersection enlarged view of the guidance screen at the guidance branch point,
The control means determines that the branch road is narrow relative to the vehicle size by the judging means, and when the running position detecting means detects that the running position in the lane is closer to the branch side from the center of the lane, A navigation device characterized by displaying an arrow on an enlarged view with a bulge on the side opposite to the branch side. The navigation device according to claim 1, wherein the control means performs voice guidance so as to travel along a guidance branch point while paying attention to an inner ring difference. In a program for controlling a navigation device that searches for a route to a destination, displays the current position of the vehicle on a map on a guidance screen, and guides it.
Detecting the current position of the vehicle;
Reading road data from the information storage means and searching for a route from the current position to the input destination;
Detecting the driving position in the lane;
Determining whether the branch road at the guidance branch point in the route is narrow with respect to the input vehicle size;
When it is judged that the branch road is narrow relative to the vehicle size and it is detected that the driving position in the lane is closer to the branch side from the center of the lane, the arrow display on the enlarged enlarged view has a bulge on the side opposite to the branch side. Step to display,
A program that causes a computer to execute.

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