JPH08159800A - Route guiding apparatus for vehicle - Google Patents

Abstract

PURPOSE: To preventively alleviate the fatigue due to effort of driver for safe driving by selecting and proposing a route in which a solar light does not dazzle from among routes to a destination, and making the driver select the route. CONSTITUTION: Map data of a road where a vehicle can travel is stored in a memory 7, and the data is divided at every bending point, and attribute data of a traveling distance, traveling required time, a signal position, the direction of the road, etc., are stored for every division. When a starting point, an ending point and a departure time are designated by a setter 6, a CPU 9 calculates the shortest distance route to the ending point, the shortest time route from the attribute data in the memory 7. The road where there is an obstacle for driving due to dazzling from the position and the direction of the vehicle, signals and the position of the sun, etc., is retrieved. Then, the CPU 9 alters the road where the sun guves dazzling, to other road, or shifts the time, and calculates the shortest distance route, the time route, etc., to pass. This is displayed with image and voice on a display device 10 and made to be selected by a driver.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle route guide device for guiding a route in which the direction of the sun as seen by a driver does not overlap with the direction of a traffic light in front of it or does not overlap with the field of view in front.

[0002]

2. Description of the Related Art As prior art, Japanese Patent Laid-Open No. 1-12929
When the origin / end point disclosed in Japanese Patent No. 9 is designated, the shortest distance route, the shortest time route and the minimum cost route are calculated and displayed on the display device, and the current position and the current time disclosed in JP-A-1-132911. It is known that the error of the azimuth sensor can be detected by calculating the operation of the sun and the moon from the data and displaying the apparent directions of the sun and the moon with respect to the traveling direction of the vehicle. In the prior art disclosed in Japanese Laid-Open Patent Publication No. 30299, when a departure place and a destination are input using a setting device, the shortest distance route, the shortest time route, and the lowest cost route are used by using the road map data recorded in the memory. Is a route guidance device for a vehicle having a function of calculating and calculating results of these.

Further, in the prior art disclosed in Japanese Patent Laid-Open No. Hei 1-132911, the direction of the sun or the moon is calculated from the current position of the vehicle and the current time, and the calculation result is displayed on the display device to display the result. This is a device that enables comparison of the direction of the sun or the moon that has been formed with the direction of the sun or the moon that actually appears, and by this comparison, it is possible to detect an error in the orientation sensor.

[0004]

However, these devices according to the prior art can detect the above-mentioned route guidance and the error of the direction sensor, but cannot perform the function of preventing glare from sunlight.

That is, when the sun can be seen in front of the vehicle in the early morning or in the evening, there is a problem that the sun is too dazzling to see the front even when the driver uses the sun visor. If there is the sun in that direction, there is a problem that it is extremely difficult to see the signal display.

For example, when sunlight in the morning and evening is incident from the front of the vehicle, in particular, when the direction of the traffic light and the sun overlap, and when the sunlight reflected by the hood of the vehicle overlaps with the road in front of the vehicle, Or, because the road ahead is barely visible, it is extremely difficult to drive, which is a major safety issue.

Therefore, the present invention has been made in view of the above points, and in order to solve the above-mentioned problems of the conventional technique, a route in which sunlight is not dazzling is calculated, and the driver is informed of the calculation result. It is an object of the present invention to provide a vehicle route guidance device capable of performing the above.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a means for determining whether or not it is difficult to drive the sun because it is in the front field of view, and the sun is selected from a plurality of routes. Provided is a vehicle route guidance device having means for selecting a route capable of avoiding glare.

Further, according to the present invention, there is provided a vehicle route guidance device according to claim 1, wherein a road heading north or south is selected when the sun is dazzling. Further, according to the present invention,
The route guidance device for a vehicle according to claim 1, wherein when the sun is dazzling, a road that goes in a direction oblique to the east-west direction is selected.

Further, according to the present invention, means for determining whether or not driving is difficult because the sun is in the front field of view,
There is provided a vehicle route guidance device having means for recommending a change in departure time.

Further, according to the present invention, the vehicle route guide device having means for selecting a route which does not pass through a signalized intersection where the direction of the sun and the direction of the signal coincide with each other as seen from the driver at that time. Will be provided.

Further, according to the present invention, claims 1, 2,
In 3, 4, 5 there is provided a vehicle route guidance device having means for inquiring whether to select a recommended route or departure time.

[0013]

The present invention focuses on the fact that the sun visor has a limit to the effect of preventing glare from sunlight, and selects a route that does not hinder driving from sunlight dazzling among a plurality of routes to the destination. Intended to calculate and inform the driver.

Therefore, in the vehicle route guidance device of the present invention, a route in which sunlight is not dazzling is selected from among a plurality of routes to the destination and the driver is informed. And
The non-dazzling route is selected by selecting a road in which the sun is not visible in the forward direction of the vehicle from the departure time, the estimated arrival time of the destination, and the position of the sun that is running.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a vehicle route guidance device according to an embodiment of the present invention is divided into a setting device 6 for inputting a departure place, a departure time, a destination, etc., road map data, and bending points. A storage device 7 for storing attributes such as the distance, speed limit, direction, etc. of each road, a shape of a signalized intersection, a direction of a traffic signal as seen from the front side of a stop line, a clock 8, and a center connected to these. Processor (CPU) 9 and CPU
9 and the display device 10 for displaying the processing result and the like.

In the above, the storage device 7 stores the map data of the road on which the vehicle can travel, divides the map data of the road at each bending point, and the travel distance and the time required for traveling for each division. Attribute data such as the position of a traffic light and the direction of a road is stored.

When the setting device 6 instructs the start and end points 1 and 4 and the departure time as shown in FIG.
Numeral 9 calculates the shortest distance route and the shortest time route between the start and end points 1 and 4 from the attribute data, and at the same time, the position and direction of the vehicle on each road A and B when traveling on these routes, the traffic light, and the sun 5 The road A, which is difficult to drive because the sun 5 is dazzling, is searched from the position.

Further, when the road A in which the sun is dazzling is searched for, the CPU 9 calculates the shortest distance route, the shortest time route, etc., which should be set so as not to pass through the road A or at different times, and display these. It is displayed on the device 10.

With such a configuration and operation, for example, at the point 3
After that, the roads C and D that can be operated while avoiding the glare of the sun 5 are guided, so that safe driving can be performed and fatigue can be reduced in advance.

Further, by storing the previous travel data in the storage device 7, it is possible to provide advance guidance not only for the travel route but also for the departure time, which may be slightly shifted before the next travel. Is.

The operation will be described below with reference to the flow charts shown in FIGS. When the departure place, the departure time, and the destination are input by the setting device 6 as described above, the CPU 9
The shortest route and the arrival time at the destination are calculated by (steps S1 and S2).

Next, the position of the sun and the relative position of the vehicle during traveling when traveling on the calculated shortest route are calculated, and based on the calculation result, the direction of the sun seen from the driver is the sun visor. 15 below the lower edge of the
A search is made to see if there is a road that can be seen within a certain degree, and if there is a road that is not selected at that time, a road whose direction is different from that of the road is selected (steps S3 to S12).

A method of selecting a road will be shown below by a specific example.
As an example, the case where the destination 4 is in the northeast direction with respect to the departure place 1 as shown in FIG. 2 will be described.

Now, the shortest route calculated by the CPU 9 first runs eastward as indicated by arrow A, and from the middle 2 to arrow B.
It is assumed that the route was to go north like. Next, the CPU 9 calculates the relative position between the sun and the vehicle when traveling on this shortest route.
As a result of the calculation, it is assumed that, when the vehicle runs toward the east as indicated by the arrow A, sunlight is incident on the driver's seat at a low angle for a while after departure, resulting in a dazzling result (step S3).

In this case, the CPU 9 notifies the driver by displaying or voice of the route which goes to the northward direction as indicated by the arrow C at the time of departure and proceeds from the middle 3 to the east as indicated by the arrow D as a non-blind route ( See FIG. 5 (a).

Contrary to the above, if the calculation result shows that the sun is not dazzling before arriving at the destination 4 in FIG. 2, proceed to the east as shown by arrow A after departure, and from the middle 2 to the destination. Before arriving at No. 4, as shown by arrow B, the route to the north is displayed or voiced to the driver as a route in which sunlight is not dazzling (see FIG. 5B).

Next, the case where the destination is in the east direction will be described with reference to FIG. As a result of calculating the relative position of the sun and the vehicle when traveling along the shortest path as described above,
It is assumed that after the departure, the sunlight is incident on the driver's seat at a low angle and the result is calculated to be dazzling.

In this case, the CPU 9 selects a road going diagonally to the east direction for a while after departure as shown in FIG. 6 (a), and alternates right and left turns to select a route to zigzag. Then, after the sun has climbed, select the route that goes straight to the east.

On the contrary, when the sunlight is low immediately before the arrival, the CPU 9 selects the route which goes straight to the east immediately after the departure and goes to the zigzag just before the destination as shown in FIG. 6B. .

The CPU 9 informs the driver of the selected route and the estimated time of arrival at the destination when the vehicle travels on the route by displaying or voice. In the above example, the case where there are destinations in the northeast and east on the assumption of the early morning sun was explained, but other directions, for example, east-northeast and southeast, are processed in the same way so that a route that is not dazzling can be obtained. You can choose.

As for the evening sun, a route that avoids glare can be selected by replacing the east with the west in the above direction and performing the same processing. In addition,
As another method of avoiding being unable to secure the driver's field of view due to the dazzling sunlight in the morning and evening, in addition to the method of calculating the recommended route described above, calculating the departure time to avoid glare,
There is also a guide to recommend changing the departure time.

In this case, it is desirable to set the travel plan in advance at least several hours before the scheduled departure time. Note that C
By inquiring the driver whether or not to select the recommended route calculated by the PU 9, the route can be finally determined.

For example, a question such as "distance increases by 10%, is it okay?" Or "time will increase by 10%, is it okay?" On the other hand, the driver can select a route that is not dazzling after confirming that it is within a range in which an increase in distance or time is allowed.

In the above description, the case where the sunlight in front is dazzling is assumed, but as a case where it is particularly desired to avoid the glare, the direction of the sun may coincide with the direction of the signal to be seen.

On the other hand, the position of the stop line at the signalized intersection and the position of the traffic light are stored in the storage device 7, and the CP
When traveling on the shortest route calculated by U9, search for a signalized intersection where the direction of the sun and the direction of the traffic light are the same when viewed from before the stop line, and if there is, find that intersection at that time. Can calculate a route that does not pass and notify the driver.

As described above, after the CPU 9 has calculated the shortest route to the destination, it is searched whether there is a road where the sunlight is dazzling, and if there is, the shortest route where the sunlight is not dazzled is calculated. By informing the driver, the shortest route in which the sunlight is not dazzling can be selected before departure.

Further, if the route that avoids the glare of the sunlight is selected and the route is not the shortest route, the estimated arrival time is displayed together with the recommended route so that the driver can select the route.

The departure time for avoiding glare is C
There is also an effect that the driver can avoid the glare by changing the departure time without changing the planned route by calculating it by the PU 9 and displaying it.

[0039]

As described above in detail, according to the present invention, in order to solve the problems of the prior art, it is possible to calculate a route in which sunlight is not dazzling and notify the driver of the calculation result. It is possible to provide the vehicle route guidance device thus configured.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining the operation of the present invention.

FIG. 3 is a flowchart for explaining the operation of the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

FIG. 5 is a diagram for explaining the operation of the present invention.

FIG. 6 is a diagram for explaining the operation of the present invention.

[Explanation of symbols]

 6 setting device 7 storage device 8 clock 9 CPU 10 display device

Claims (6)

[Claims] 1. A vehicle having means for determining whether or not it is difficult to drive because the sun is in the front field of view, and means for selecting a route that can be run while avoiding the glare of the sun from a plurality of routes. Route guidance device. 2. The vehicle route guidance device according to claim 1, wherein a road heading north or south is selected when the sun is bright. 3. The vehicle route guidance device according to claim 1, wherein when the sun is dazzling, a road heading in a direction oblique to the east-west direction is selected. 4. A vehicle route guidance device having means for determining whether or not it is difficult to drive because the sun is in the front field of view, and means for recommending a change in departure time. 5. A vehicle route guidance device having means for selecting a route that does not pass through a signalized intersection where the direction of the sun and the direction of the signal are the same as seen from the driver at that time. 6. A route guidance device for a vehicle according to claim 1, 2, 3, 4, 5 having means for inquiring whether to select a recommended route or a departure time.