JP2870867B2 - Vehicle guidance system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a travel guidance device for a vehicle.

(Conventional technology) Considering a situation where a driver is driving to a certain destination while driving a car, a driver maps a strange land in a lonely space isolated from the outside world of a car. It can be said that he is simply stepping on the accelerator to his intended destination, relying on road signs and landscapes.

In other words, even today, when computers and data communication have been developed and information is said to be excessive, the essence of driving a car is almost the same as when the car was invented.

In view of such circumstances, the development of a driving guide system as a vehicle travel guidance device called a navigation system has been increasingly active recently.

The navigation system detects, for example, a horizontal component of a geomagnetic vector and uses it as a direction parameter (hereinafter, referred to as a geomagnetic method) or a gas rate gyro using inertia of helium gas as a direction sensor. (Hereinafter referred to as inertial navigation) and at least three circular orbiting satellites (GPS)
Various systems have been proposed, such as a GPS system (global positioning system), which can detect an accurate position at any place on the earth by using GPS. Each of these methods is a division based on a difference in how to detect and recognize the position of the own vehicle during traveling, and basically has many common parts except for that point.

That is, first, a CD-ROM storing a large number of map data as travel guide information of the vehicle is provided,
Destination setting means, destination recognition means for recognizing the destination set by the destination setting means, own vehicle position recognizing means by any of the above methods, etc., and the own vehicle position and destination Therefore, the optimal travel route to the destination is set and displayed on the CRT display (see, for example, JP-A-61-209216).

With the use of the vehicle guidance device having such a configuration,
The driver can safely arrive at the destination simply by following the route while watching the optimal route in the map state displayed moment by moment on the display screen. Then, the own vehicle mark that moves as the vehicle travels is displayed on the route.

(Problems to be Solved by the Invention) By the way, in the case of the above configuration, if the optimum traveling route is certainly shown based on the departure point, and if the driving can be continued to the end without deviating from the optimal traveling route, there is no doubt that You can reach your destination.

However, as a practical matter, it is difficult to perform driving along the optimal driving route displayed on the CRT screen, and it may happen that the driver turns an intersection other than the one inadvertently instructed. Moreover, in such a case, even if the user notices on the way, there are many roads such as U-turn prohibition, right-turn prohibition, one-way traffic, and the like, and it is not easy to return to the original road. As a result, there may be a case where the vehicle deviates greatly from the original optimal route. This is all the more so, especially if you make a mistake.

In such a case, the conventional configuration does not particularly have a function of guiding the return to the original optimal route.
There is no other way than to judge the road with the driver's intuition,
On the contrary, there is a problem that the road is largely wrong.

In this case, for example, it is conceivable to provide a guide function to make a U-turn and simply return to the original optimal traveling route, but it is difficult to grasp the actual road condition, and in the case of U-turn prohibition or one-way traffic, Even if you are instructed to do so, you cannot go back. This is true regardless of the distance to the destination.

(Means for Solving the Problems) The present invention has been made for the purpose of selecting the above problem, and recognizes a target position recognizing means for recognizing a target position to be reached and a current vehicle position. Self-vehicle position recognizing means, and optimal traveling for setting a first optimal traveling route from a relationship between the target position recognized by the target position recognizing means and the current own vehicle position recognized by the self-vehicle position recognizing means. Route setting means, display means for displaying the first optimal travel route set by the optimal travel route setting means, and the vehicle position recognized by the vehicle position recognition means being displayed on the display means. A warning unit that warns when the vehicle is about to depart from the first optimal traveling route; and a state in which the self-vehicle position departs from the first optimal traveling route despite the warning of the warning unit. Correspondingly, based on the relationship between the departure position and the destination position, the optimal travel route is changed to the first optimal travel route, and the vehicle travels from the current position toward the destination without returning to the first optimal travel route. An optimal traveling route changing means for resetting the vehicle to the second optimal traveling route, and when the position of the own vehicle deviates from the first optimal traveling route despite the warning of the warning means, the optimal traveling route changing means re-sets the vehicle. The set second optimal traveling route is updated and displayed on the display screen of the display means.

(Operation) In the configuration of the traveling guidance apparatus for a vehicle according to the present invention, the current vehicle position is recognized by, for example, the vehicle position recognition means. A state of departure from the first optimal traveling route set and displayed earlier is detected, and the current position of the own vehicle is detected by the first optimal traveling route.
When the vehicle is about to depart from the optimal traveling route, a warning is first issued to the driver by the warning means and the first
To return to the optimal driving route. Therefore, traveling on the original first optimal traveling route is possible unless there is a special situation.

On the other hand, when there is a special situation and the vehicle departs from the first optimal traveling route despite the warning, a new relationship between the current vehicle position and the destination corresponding to the departure state is obtained. Optimum for reestablishing a second optimal travel route heading for a destination in the forward direction without returning to the first optimal travel route direction in consideration of road conditions such as prohibition of U-turn and one-way traffic. Since the driving route changing means is provided, the driver can move to the destination from the departure point without returning to the first optimum driving route according to the newly set second optimum driving route. It is only necessary to continue driving.

Therefore, when it is clearly deviated from the original first optimal traveling route and it is recognized that the return to the first optimal traveling route is not appropriate, regardless of the distance to the destination,
It is possible to guide the driver to safely and smoothly advance toward the destination without having to reverse or make a U-turn.

(Effects of the Invention) Therefore, according to the traveling guidance device for a vehicle of the present invention, the warning function of the warning means allows the vehicle to reliably travel along the original optimal traveling route, and erroneously misroutes the original optimal traveling route. Even if the vehicle has departed from the vehicle, it will be possible to continue traveling forward and continue the navigation operation, giving a great sense of security to the driver even when the road conditions are unknown. Therefore, free and reliable operation can be assured, which can contribute to the reduction of fatigue in long-distance driving.

(Embodiment) Fig. 1 to Fig. 5 show the configuration and operation of a traveling guidance device for a vehicle according to an embodiment of the present invention. First, FIG. 2 shows a system structure of a vehicle travel guidance device according to the embodiment. Reference numeral 10 denotes a navigation control unit which is a center of a control unit, and the navigation control unit 10 is a central information processing unit. Equipment (CPU) 1
1, a read-only memory (hereinafter simply referred to as ROM) 12 with a built-in control program12, a random access memory (hereinafter simply referred to as
A RAM 13), an interface circuit 14 for inputting and outputting data between various types of external devices described below and the CPU 11, and the like.

And the above navigation control unit 10
As an external device to be combined with, a car-mounted vehicle for reading out the map information of a CD-ROM (compact disk type read only memory) 1 in which a large number of the above-described map-type travel guidance information are stored in a plurality of scales. CD player 2, an operation switch unit 3 for performing operations such as setting, changing, resetting, and changing the optimum route of a destination, and at least 3 being launched into a circular orbit around the earth E as shown in FIG.
Waves transmitted from GPS-A, GPS-B, and GPS-C (SH
F) The vehicle position recognizing device 4 constituted by a GPS receiver for receiving the image signal output from the CPU 11, a display control circuit 5 for inputting the image signal output from the CPU 11 and displaying the image signal output on the screen of the CRT display 6 of the instrument panel unit. A video memory 7 and the like attached to the circuit 5 are provided.

The CD player 2 drives the CD-ROM 1 and drives the CD-RO
An address (specified by east / west / north / north / north) where the required predetermined information from the map information of all over Japan stored in M1 is specified
, The decoder 8 and the interface circuit 14
Is input to the CPU 11 via. These read information are temporarily stored in the RAM 13. The output of the CD player 2 decoded via the decoder 8 is also output to the side of an ordinary in-vehicle audio device (AMP, equalizer, speaker, etc.) 9.

The CD-ROM 1 stores about 30,000 pieces of map information of color still images. For example, in the case of this embodiment, at least three kinds of scales are prepared. It is configured so that information can be expanded or reduced in eight steps.

Next, the operation switch 3 is, for example, a screen touch type, and is provided with various operation switches such as menu, information, resetting, enlargement, reduction, and correction. The ON output of the operation switch 3 is coded by the encoder 16 and then input to the CPU 11 via the interface circuit 14. The CPU 11 performs a predetermined operation (program processing) in response to the operation input, activates the display control circuit 5 for driving the CRT, and displays an image corresponding to the instruction content.

Further, the own vehicle position recognizing device 4 includes three navigational sanitary GPS-A to GPS-GPS on a circular orbit around the earth E as shown in FIG.
-C adapted to recognize the two-dimensional position of the point P of the current vehicle by the respective distances l ₁ to l ₃ to radio measurements from the recognized data RAM13 temporarily via the CPU11 (Every predetermined cycle).

The CPU 11 is software-structured and provided with a control function as shown in FIG. 1, for example, and is initialized by the host vehicle position information detected and recognized by the host vehicle position recognition device 4 and the operation switch 3. An optimal route setting function for setting an optimal route from the current position to the destination from the destination information based on the destination data, comparing the own vehicle position information with the optimal route information, and a predetermined level or more between them. If there is a deviation, an optimal route change function for resetting the previously set optimal route starting from the current position in accordance with the level difference is provided, and these are configured as shown in FIG. Are sequentially updated and displayed on the screen of the CRT display 6. In this case, a system that outputs a buzzer sound to the in-vehicle audio device 16 and warns when necessary when the position of the vehicle deviates from the initially optimal route is employed. Above when such a configuration is adopted
FIG. 4 shows a control operation of the CPU 11 as a flowchart.

As described above, in the configuration of the traveling guidance device for a vehicle according to the embodiment of the present invention, by recognizing the current vehicle position by the vehicle position recognizing means, it is most appropriate from the relationship between the origin and the destination. The departure state from the first optimal traveling route previously set and displayed is detected, and when the current position of the own vehicle is about to depart from the first optimal traveling route, the driver is first alerted by the warning means. A warning is issued to prompt the user to return to the first optimal traveling route immediately. Therefore, traveling on the original first optimal traveling route is possible unless there is a special situation.

On the other hand, when there is a special situation and the vehicle departs from the first optimal traveling route despite the warning, a new relationship between the current vehicle position and the destination corresponding to the departure state is obtained. Optimum for reestablishing a second optimal travel route heading for a destination in the forward direction without returning to the first optimal travel route direction in consideration of road conditions such as prohibition of U-turn and one-way traffic. Since the driving route changing means is provided, the driver can move to the destination from the departure point without returning to the first optimum driving route according to the newly set second optimum driving route. It will be good if you continue driving.

Therefore, when it is clearly deviated from the original first optimal traveling route and it is recognized that the return to the first optimal traveling route is not appropriate, regardless of the distance to the destination,
It is possible to guide the driver to safely and smoothly advance toward the destination without having to reverse or make a U-turn.

Therefore, according to the traveling guidance device for a vehicle of the present invention, the warning function of the warning means enables the vehicle to reliably follow the original optimal traveling route, and at the same time, if the vehicle accidentally leaves the original optimal traveling route. In this case, it is possible to continue the navigation by continuing to travel forward, giving a great sense of security to the driver even when the road condition is unknown. Driving can be guaranteed, and it can contribute to reducing fatigue during long-distance driving.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a system configuration diagram of a vehicle driving guidance device according to an embodiment of the present invention, and FIG. 3 is a vehicle position recognition in the system of FIG. FIG. 4 is an explanatory view showing the principle of recognition of the device, FIG. 4 is a flowchart showing the operation of the CPU of the navigation control unit in the system shown in FIG. 2, and FIG. 5 is an explanatory view showing a change in the display screen corresponding thereto. DESCRIPTION OF SYMBOLS 1 ... CD-ROM 2 ... CD player 3 ... Operation switch 4 ... Local position recognition device 5 ... Display control circuit 6 ... CRT display 10 ... Navigation control unit 11 ... CPU 12 ... ROM 13 ……RAM

Claims (1)

(57) [Claims] 1. A target position recognizing means for recognizing a target position to be reached, a vehicle position recognizing means for recognizing a current vehicle position, a target position recognized by the target position recognizing means, and the vehicle position. An optimal traveling route setting means for setting a first optimal traveling route based on a relationship with the current position of the vehicle recognized by the recognizing means; and a first optimal traveling route set by the optimal traveling route setting means. Display means, and a warning means for warning when the vehicle position recognized by the vehicle position recognition means is about to depart from the first optimal traveling route displayed on the display means,
When the vehicle position departs from the first optimal traveling route despite the warning of the warning means, the optimal traveling route is determined from the relationship between the departure position and the target position in accordance with the departure state.
The second traveling forward from the current position toward the destination without returning to the first optimal traveling route instead of the optimal traveling route
Optimal travel route changing means for resetting the vehicle to the optimal travel route, and when the own vehicle position deviates from the first optimal travel route despite the warning of the warning means, resetting is performed by the optimal travel route changing means. The travel guidance device for a vehicle, wherein the updated second optimal travel route is updated and displayed on a display screen of the display means.