JP3059642B2 - Vehicle route guidance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling route guidance device for a vehicle.

[0002]

2. Description of the Related Art In recent years, a two-way communication system connecting a vehicle route guidance device (a so-called navigation device) and a traffic management center has been used in order to enhance driving safety and comfort and promote traffic efficiency. It is known to automatically send the current position and traveling direction of a car to a management center, receive traffic information on the traveling direction from a turnaround management center, and display the information on a vehicle-mounted display together with a navigation map (automobiles). Technology, 1990 VoL.44 "Automotive and information communication systems").

[0003] However, simply displaying traffic information on a navigation map is often not useful for drivers who are not familiar with detours to destinations. Therefore, while receiving the traffic information that changes every moment while driving, it adds various judgment factors to past driving data to infer the optimal route to the destination, and based on this, the vehicle approaches on the navigation map There has been proposed a display in which the course direction is displayed at an intersection where the vehicle travels (see Japanese Utility Model Application No. Hei 3-20423).

[0004]

By the way, in this prior application, an optimum route to one destination is guided, but when the destination is reached, the next destination is artificially input. There was a problem that must be done. When applied to vehicles that deliver luggage, etc., this assumes a route that most efficiently goes through multiple destinations,
Each time one destination is reached, it is required to input the next destination, which is very troublesome even for an experienced driver, and it is difficult to assume an appropriate route. Further, even if an optimum route is determined in advance, traffic conditions change every moment, so that passing through the route as it is may lower delivery efficiency.

The present invention has been made in consideration of such a problem, and when a plurality of destinations are input, determination of destinations according to priorities based on delivery efficiency and route guidance to the destinations are automatically performed. The purpose of the present invention is to provide a device that performs the operation in a specific manner.

[0006]

According to a first aspect of the present invention, as shown in FIG. 5, means a for detecting the current position and the traveling direction of the vehicle,
Means b for inputting a plurality of destinations as destinations, means c for storing map information, experience data and judgment coefficients,
Means e for calculating the journey between the other destinations from the accumulated data for each of these starting points for each destination;
Means f for estimating the arrival time at each destination from the accumulated data, using each of these as a starting point, to arrive at another destination.
A means g for calculating a scalar between destinations including the departure starting point based on these journeys and the predicted time; and a means h for sorting the destinations in ascending order of scalar priority.
And priority 1 for each destination excluding destinations already passed
There is provided means i for determining the destination of the next position as the next destination, and means j for displaying the determined destination and the direction in which the vehicle should proceed, such as directions to the destination, on the navigation map.

In the second invention, the means k for receiving traffic information relating to the destination route of the vehicle in FIG. 5 and the means m for correcting the distance between destinations and the estimated arrival time according to the information content are shown in FIG. Add.

[0008]

According to the first aspect, when a plurality of destinations are input, a scalar between other destinations is obtained for each destination from the journey and the estimated arrival time, and these are sorted in ascending order. Then, for each destination, the first priority destination other than the destination that has already been passed is determined as the next destination, and the destination and the direction in which the vehicle should proceed, such as the route to that destination, are displayed on the navigation map. I do. Therefore, if the driver travels according to the route guidance on the navigation map, the route is based on the scalar of the route and the estimated arrival time, and is along a polygonal side having a plurality of destinations including the departure point, Delivery operations via each destination can be performed most efficiently.

According to the second aspect of the present invention, the distance between the destinations and the estimated arrival time are corrected according to the traffic information, and the priority of the destinations changes depending on the content of the information. Impact on delivery efficiency is minimized.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a two-way communication device for detecting a current position and a traveling direction of a vehicle and connecting a communication satellite and a traffic management center to obtain traffic information on a delivery route; Reference numeral 2 denotes an operation device capable of inputting a plurality of destinations, and 4 denotes an image information processing device for displaying, on the navigation map, the destination and the direction of travel of the vehicle, such as a route to the destination, as an inference result of the control device 3 (FIG. 2 shows a display (CRT) with a display (CRT).

The control device 3 has a knowledge base 5 for accumulating various judgment coefficients and experience data (starting point and destination, its journey and required time, date and time and day of the week, etc.) in addition to map information.
A logic processing unit 6 that determines a destination to be reached and infers an optimal route to the destination while taking traffic information into consideration based on the data.

FIG. 2 is a flowchart for explaining a destination determining process performed by the logical processing unit.
_{When 0} destinations are input, a route S between the other destinations (the number of combinations is n = n ₀ -1) is calculated from the navigation map for each of the destinations, using each of these as a starting point. , A predicted arrival time T to another destination is obtained from the empirical data, and a scalar Z between the destinations is calculated as shown in Table 1 based on the route S and the predicted arrival time T (1.01 to 1). .05).

If there is no empirical data that can predict the arrival time T at the destination, a prediction is made with a weight (judgment coefficient) according to the type of road to the destination. (Calculate 0.5 km for 60 km / h, 1 h for prefectural road at 30 km / h and 3 h for city road at 10 km / h.) And
The scalar Z of each destination is sorted in ascending order using the priority as shown in Table 2 (1.06).

When the destination corresponding to the current position of the vehicle is substituted for the starting point ρ, a destination to be headed is given as described later (1.07). Although the direction in which the vehicle should travel, such as the route to the destination, is not shown, the conventional example (Japanese Utility Model Application No. 3-20
No. 423), and the route direction is sequentially displayed at the intersection where the vehicle approaches on the navigation map.

Each time the vehicle arrives at the destination, the destination corresponding to the current position of the vehicle is substituted for the starting point ρ, and it is determined whether or not the vehicle has passed through the starting point ρ in order from the destination having the highest priority R. While confirming, the destination with the highest priority except for the passed destination is determined as the next destination (1.
18).

At this time, traffic information relating to the destination route of the vehicle is received, and in a subroutine (not shown), the distance between the destinations and the estimated arrival time are corrected in accordance with the contents of the information. Each time it arrives, it is checked whether there is a changed scalar Z, and the priority is changed if necessary (1.12, 1.13).

In Table 2, for example, a destination A is defined as a starting point ρ
Then, if there is no change in the priority order, if the destination D, which is the first in the priority order R for A, has not passed, D is determined as the next destination, and when the destination D is reached, D is the starting point. Similarly, the next destination B is determined as ρ except for the destination A that has already passed, and the destination determination process is repeated until all destinations A to I have been passed in this way (1.11). ).

With such a configuration, when the driver inputs a large number of destinations (destinations) at the delivery base or the like with the operation device 2, the driver only has to drive according to the guidance display on the navigation map. Based on the scalar Z of the route S and the estimated arrival time T, the delivery operation through all the destinations is performed most efficiently on the route from the delivery base to the destination along the polygonal side. It becomes possible.
In this case, even if the route S between the destinations or the estimated arrival time T is changed in accordance with the traffic information, the necessary priorities are sorted again within the range, so that the optimum route corresponding to the traffic condition is determined. Can be displayed. That is, the influence of traffic congestion on the delivery efficiency can be minimized.

In the calculation of the scalar Z, if the ratio of the coordinate axes of the route S and the estimated arrival time T is changed from 1: 1, the route passing through each destination can be a route that emphasizes either distance or time. Also becomes possible.

[0020]

According to the first invention, means for detecting the current position and traveling direction of the vehicle, means for inputting a plurality of destinations as destinations, and accumulation of map information, experience data and judgment coefficients Means for calculating the distance between each of the destinations from each of the destinations based on the accumulated data for each of the destinations, and the time of arrival at each of the destinations for each of the destinations from each of the starting points. From the accumulated data, a means for calculating a scalar between destinations based on these journeys and a predicted time, a means for sorting the destinations in order of decreasing scalar priority, and a pass for each destination Priority 1 excluding destinations already
Since there is a means for determining the destination of the rank as the next destination, and a means for displaying on the navigation map the direction that the vehicle should go, such as the determined destination and the directions to get there,
If the driver follows the route guidance on the navigation map, it will be based on the scalar of the journey and the estimated arrival time,
With a route along a polygonal side having a plurality of destinations including a departure point as points, it is possible to perform the delivery business via each destination most efficiently.

According to the second invention, the means for receiving the traffic information relating to the route of the own vehicle according to the first invention and the means for correcting the distance between the destinations and the estimated arrival time according to the information content Therefore, even if the route between destinations or the estimated arrival time changes according to the traffic information, the necessary priorities are sorted again within that range, so the optimal route corresponding to the traffic situation is determined. I can run.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart illustrating control contents.

FIG. 3 is a scalar table between destinations.

FIG. 4 is a priority table of destinations.

FIG. 5 is a diagram corresponding to claims of the present invention.

[Explanation of symbols]

 Reference Signs List 1 bidirectional communication device 2 input operation device 3 control device 4 display 5 knowledge base 6 course logical processing unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29/10

Claims (2)

(57) [Claims] A means for detecting a current position and a traveling direction of the vehicle; a means capable of inputting a plurality of destinations as destinations;
Means for accumulating map information, experience data, and judgment coefficients, means for calculating the journey between other destinations from each of these starting points for each destination, and starting each of these for each destination Means for predicting the arrival time to other destinations from accumulated data as points, means for calculating scalar between each destination based on these journeys and predicted time, and priority for each destination in the order of smaller scalar Means for sorting, means for deciding, as the next destination, the first priority destination excluding destinations that have already passed for each destination, and the vehicle to be traveled, such as the decided destination and the route to that destination. A traveling route guidance device for a vehicle, comprising: means for displaying a direction on a navigation map. 2. The vehicle according to claim 1, further comprising: means for receiving traffic information relating to the route of the vehicle, and means for correcting a route between destinations and an estimated arrival time in accordance with the information content. A travel route guidance device according to claim 1.