JPH0789063B2 - Vehicle driving 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 vehicle travel route guide device for guiding a vehicle driver when a vehicle approaches an intersection on a preset travel route.

[0002]

2. Description of the Related Art Conventionally, as a vehicle travel route guide device, a display device such as a CRT or a liquid crystal display displays a planned travel route from a vehicle start point to a destination and a current vehicle position along with a road map. When the vehicle approaches an intersection on the planned traveling route, there is known a device configured to guide the vehicle occupant in the traveling direction at the intersection by a display screen, voice, or the like.

[0003]

In this type of travel route guiding apparatus, when the vehicle is traveling along the planned travel route from the place of departure to the destination, the direction of travel of the vehicle at each intersection is determined. It is possible to guide accurately and guide the vehicle toward the destination accurately.For example, when the vehicle travels in the opposite direction from the destination to the departure point, the traveling direction at each intersection Since the direction is opposite to the set traveling direction, there is a problem that if the vehicle is guided as it is, the traveling direction at each intersection will be reversed.

In order to solve such a problem, it is conceivable that the guidance of the planned traveling route can be selected to either the forward route or the backward route, but in such measures, the switching of the selection switch is forgotten. In that case, the same problem as described above occurs. Furthermore, the applicant of the present application, in this type of travel route guidance device, when the vehicle escapes from an intersection on the planned travel route, if the escape direction is different from the planned travel route, it is determined that a route deviation has occurred. In consideration of informing the vehicle occupant of that fact, it has been disclosed in Japanese Patent Application No. 4-348658 filed earlier, but in a device for guiding such route deviation, when traveling in the opposite direction of the planned traveling route, Each time the vehicle exits the intersection, the deviation of the route is guided, which makes the device inconvenient for the vehicle occupants.

The present invention has been made in view of these problems. Even when the vehicle travels in the opposite direction from the destination to the place of departure, the traveling route can be changed without giving a feeling of strangeness to the vehicle occupants. It is an object of the present invention to provide a travel route guide device for a vehicle that can provide guidance.

[0006]

DISCLOSURE OF THE INVENTION The present invention made to achieve the above object is, as illustrated in FIG. 1, display means for displaying a road map, map data representing the road map, and the road map. Map data storage means for storing the planned traveling route of the vehicle above, vehicle position detection means for detecting the vehicle position, and displaying a road map on the display means based on the map data, and on the road map, In a travel route guidance device for a vehicle, comprising: a display control unit that displays the planned travel route and the vehicle position in a distinguishable manner, the vehicle is arranged along the planned travel route at each intersection on the planned travel route. The entry determination area when entering the intersection, the passage determination area for determining that the vehicle has passed through the intersection, and along the planned travel route when the vehicle exits the intersection Area setting means for respectively setting escape determination areas for determining whether the vehicle has entered, and whether the vehicle has entered the entry determination area set by the area setting means based on the vehicle position. However, when the vehicle enters the entry determination area, the entry guidance means for guiding the vehicle occupant in the traveling direction of the vehicle at the intersection corresponding to the entry determination area, and the vehicle based on the vehicle position It is determined whether or not the vehicle has entered the passage determination area set by the setting means, and if the vehicle has entered the passage determination area, it is indicated that the vehicle is passing through the intersection corresponding to the passage determination area. Passing guide means for guiding the occupant and, when the vehicle enters the entry determination area of the intersection after the passing guide means performs the passage guidance for the intersection, the approach guidance for prohibiting the guiding operation by the approach guiding means. Prohibition measures and When the approach guidance means provides guidance in the traveling direction to the intersection at which the vehicle has entered, thereafter, the vehicle moves from the intersection to the planned travel route using the escape determination area of the intersection set by the area setting means. And a route deviation guide means for guiding a vehicle occupant of a deviation from the planned traveling route of the vehicle if the vehicle has not escaped along the planned traveling route. Is characterized by.

[0007]

In the vehicle travel route guiding apparatus of the present invention configured as described above, the display control means displays the road map on the display means based on the map data stored in the map data storage means, and On the displayed road map, the planned traveling route of the vehicle stored in the map data storage means and the vehicle position detected by the vehicle position detection means are displayed in a distinguishable manner.

Further, in the vehicle travel route guiding apparatus of the present invention, the area setting means determines, for each intersection on the planned travel route, an entry determination area when the vehicle enters the intersection along the planned travel route, A passage determination area for determining that the vehicle has passed through the intersection and an escape determination area for determining whether or not the vehicle is along the planned traveling route when the vehicle exits the intersection are set.

Then, the approach guide means determines whether or not the vehicle has entered the entry determination area set by the area setting means. If the vehicle has entered the entry determination area, the entry determination means While guiding the traveling direction of the vehicle at the intersection corresponding to the area to the vehicle occupant, the passage guide means determines whether the vehicle has entered the passage determination area set by the area setting means, When the vehicle enters the passage determination area, the vehicle occupant is informed that the vehicle is passing through the intersection corresponding to the passage determination area.

Further, when the vehicle enters the entry determination area of the intersection after the passage guidance means performs the passage guidance of the intersection, the entry guidance prohibiting means performs the guidance operation in the vehicle traveling direction by the entry guidance means. Ban. In other words, when the vehicle is traveling in the opposite direction from the destination to the place of departure on the planned route, the vehicle should enter the passage determination area without passing through the entry determination area and then enter the entry determination area. Therefore, in such a case, even if the vehicle enters the entry determination area, guidance in the traveling direction at the intersection is prohibited.

Furthermore, when the approach guide means provides guidance in the traveling direction to the intersection at which the vehicle has entered, the route deviation guide means uses the escape determination area of the intersection set by the area setting means. It is determined whether or not the vehicle has escaped from the intersection along the planned traveling route, and if the vehicle has not escaped along the planned traveling route, the vehicle occupant is informed of the deviation of the vehicle from the planned traveling route. That is, by performing the determination and guidance of the route deviation using the escape determination area by the route deviation guide means only when the vehicle enters the entry determination area along the planned traveling route and guides the traveling direction at the intersection. While the vehicle is traveling on the planned traveling route in the opposite direction from the destination to the side of the departure place, the route deviation is guided to prevent the vehicle occupant from feeling uncomfortable.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 2 is a block diagram showing the overall configuration of a vehicle navigation device of an embodiment to which the present invention is applied.

As shown in FIG. 2, the navigation device of this embodiment is equipped with a GPS antenna 2a for receiving radio waves transmitted from an artificial satellite (NAVSTAR) for GPS (Global Positioning System), and frequency-converts the received signal. Then, demodulation is performed to calculate latitude data, longitude data, and altitude data representing the position of the receiving point (vehicle position), and the moving speed (vehicle speed) and moving direction (vehicle traveling direction) of the receiving point.
A well-known GPS receiver 2 for calculating vehicle position detecting means and vehicle speed detecting means, for inputting a planned traveling route, and for switching the operation mode of the device to a traveling route input mode, a traveling route guiding mode, or the like. An input device 4 including various key switches, an external storage device 6 as map data storage means in which map data is stored in advance, an alarm device 12 for giving various alarms to a vehicle driver by voice, and a road map. And C to display various messages
Various kinds of data are read from the display device 14 as a display unit including an RT, a liquid crystal display, etc., the GPS receiver 2, the input device 4, the external storage device 6 and the like, and the alarm device 12 and the display device 14 are drive-controlled based on the data. And a control device 20 that operates.

Here, in the external storage device 6, in addition to map data for displaying a road map, the planned travel route is set and
For display, preset intersection data is stored for each intersection on the road map. As shown in FIG. 3, the intersection data includes the intersection address Ci (i: integer from 1 to m) attached to each intersection forming the road map, the longitude (x coordinate) data representing the position of each intersection, and the latitude. (Y coordinate) data, an address Ci of an adjacent intersection adjacent to each intersection, a node list representing an inflection point Ni on the road between each intersection and the adjacent intersection, and the like. Further, this intersection data can be stored as a registered intersection Pi with the registration number i added to the intersections on the planned travel route in the order of travel from the origin to the destination.

Next, the control unit 20 includes a CPU 22, RO
The alarm device 12 and the display device 1 are configured as a well-known microcomputer provided with an M24, a RAM 26, an input / output port 28, and a bus line 30 connecting these parts, and via an alarm drive device 32 and a display drive device 34.
4 is driven and controlled.

When the operation mode of the control device 20 is set to the travel route input mode, the control device 20 configured as described above sequentially operates the intersections on the planned travel route input by the operation of the input device 4. By storing it as the registered intersection Pi, the traveling route input process of storing the planned traveling route in the external storage device 6 is executed.

When the operation mode of the device is set to the travel route guidance mode, first, the external storage device 6
The map data centering on the current vehicle position is read from the display device, and based on the read map data, a road map is displayed on the display device 14 and displayed on the displayed road map, for example, as shown by area A1 in FIG. The initial display processing of the road map is executed in a procedure of highlighting the vehicle position S and the planned traveling route (routes with diagonal lines in the figure), and the vehicle is passed when the vehicle passes the registered intersection Pi when guiding the traveling route. A guidance initial setting process is executed as a region setting means for initializing various regions for guiding the driver to that effect. Then, after that, the display state of the display device 14 is sequentially updated according to the traveling of the vehicle, and a traveling route guidance process for performing a predetermined guidance when the vehicle passes through the registered intersection Pi is executed.

In the display device 14, the vehicle position S
Is highlighted by a red triangle mark indicating the traveling direction when the GPS receiver 2 can detect the vehicle position and the traveling direction, and is black when the GPS receiver 2 cannot detect the vehicle position. It is highlighted with a circle. In addition, the planned traveling route is highlighted by displaying the road and the intersection that are the planned traveling routes in a color (for example, orange) different from the color of the other roads (for example, blue).

Hereinafter, the guidance initial setting processing and the travel route guidance processing executed by the control device 20 as described above will be described in detail with reference to FIGS. First of all,
It is a flow chart showing the above-mentioned guidance initial setting processing.
As shown in FIG. 5, in this guidance initial setting process, first, in step 110, the vehicle occupant moves the vehicle from the destination to the departure point in the opposite direction to the registration order of the registration intersection Pi through the input device 4. It is determined whether or not the return route mode for traveling to is set. Then, if the return route mode is not set, the passage guidance of the registered intersection Pi may be performed in the order of registration, so that the process directly proceeds to step 130.
If the return route mode is set, the registration number i representing the registration order of the registered intersection Pi stored in the intersection data is sequentially rewritten by setting the intersection closest to the destination to "1", thereby registering each registered intersection Pi. All the numbers i are inverted and the process proceeds to step 130.

In this rewriting, for example, when the registration number of the final intersection closest to the destination is "n", the registration number i of each registered intersection Pi is {i ← n-i +
It can be executed by rewriting as 1}. Next, at step 130, as shown in FIG. 6, for each registered intersection Pi stored in the intersection data, as shown in FIG.
A circle with a radius of about 350 m centered at is set as an approach determination circle Vi for determining the approach of the vehicle to the registered intersection Pi.

Further, in the subsequent step 140, for each registered intersection Pi, the vehicle is registered along the planned travel route at the registered intersection P.
A fan-shaped entry determination area Wi along the entry direction of the vehicle is set as an entry determination area for guiding the traveling direction of the vehicle from the registered intersection Pi when the vehicle enters i.

In this entry determination area Wi, as shown by the diagonal lines in FIG. 6, the intersection Pi where the vehicle is registered along the planned traveling route Pi.
Is set to a substantially fan shape obtained by drawing arcs with a radius of about 200 m and a radius of about 30 m around the registered intersection Pi at a predetermined angle centered on the approach direction when approaching the vehicle. The angle with respect to the direction is set so that the straight line distance (string) connecting both ends of the circular arc is double that corresponding to the positioning accuracy of GPS (for example, 100 m).

In this step 140, the preset pattern data for setting the entry determination area is coordinate-converted on the road map based on the position coordinates of the registered intersection Pi and the entry direction of the vehicle to enter the entry pattern. Judgment area W
Set i. In addition, the approaching direction of the vehicle to the registered intersection Pi is the adjacent intersection Pi-1 immediately before which is connected to the registered intersection Pi {however, the adjacent intersection Pi-1 and the registered intersection P are connected to each other.
When there is an inflection point (node) between i and i, it is obtained by connecting the node closest to the registered intersection Pi} and the registered intersection Pi with a straight line.

Next, in step 150, as a passage determination area for determining the passage of the vehicle at each registered intersection Pi, a radius centered on the registered intersection Pi as shown in FIG. 6 for each registered intersection Pi. About 30m circle (passage circle) X
Set i. Next, in the next step 160, when the vehicle enters the registered intersection Pi along the planned traveling route, a route deviation determination circle for determining whether or not the vehicle has escaped from the registered intersection Pi along the planned traveling route. Yi is set for each registered intersection Pi as shown in FIG.

The route deviation determination circle Yi is set by drawing a circle centered on the registered intersection Pi with a radius slightly larger than the arc of the entry determination area Wi. Finally, at step 170, for each registered intersection Pi, as shown in FIG. 6, when the vehicle has moved outside the route deviation determination circle Yi, whether the vehicle has properly traveled along the planned traveling route. The route deviation determination direction Zi for determining whether or not is set, and the process ends.

In this route deviation determination direction, the adjacent intersection Pi + 1 which is connected to the registered intersection Pi and should be driven next is Pi + 1.
(However, when there is an inflection point (node) between the adjacent intersection Pi + 1 and the registered intersection Pi, the node closest to the registered intersection Pi) and the traveling direction of the vehicle connecting the registered intersection Pi As, a range having an angle substantially the same as the angle of the fan of the entry determination area Wi is set.

As described above, by the guidance initial setting process, various areas for guiding the vehicle driver when the vehicle passes the registered intersection Pi, that is, the approach determination circle V
When i, the approach determination area Wi, the passage determination circle Xi, the route shift determination circle Yi, and the route shift determination direction Zi are set,
This time, the travel route guidance processing shown in FIG. 7 is executed.

This travel route guidance process is a so-called timer interrupt process which is executed at predetermined time intervals. When the process is started, first, at step 210, the GPS receiver 2 is used to determine the current vehicle position. And the direction of travel is detected. And
In subsequent step 220, vehicle position display processing for updating the vehicle position and the traveling direction on the road map displayed on the display device 14 is executed based on the detection result.

This vehicle position display processing not only displays the latest vehicle position on the road map of the display device 14, but also changes the vehicle display position on the display screen so that the vehicle position is displayed on the display screen. When the vehicle position is displayed on the edge of the display screen outside the predetermined area, the vehicle position is changed from the center of the display screen to the position of the point object, for example, from the area A1 shown in FIG. 4 to the area A2. , The road map displayed on the display device 14 is changed. Note that this processing corresponds to the display control means of the present invention.

Next, at step 230, the detected vehicle position is set to the registered intersection Pi by the guidance initial setting process described above.
It is determined whether or not the vehicle position is within any one of the approach determination circles V1 to Vn set for each vehicle, and the vehicle position is determined by any of the approach determination circles V
If it is within i, the process proceeds to step 240, and the registration number i of the registered intersection Pi corresponding to the approach determination circle Vi is i.
Read.

At step 240, when the registration number i of the intersection which the vehicle is approaching is read, next step 250 is entered to set the vehicle position to the intersection Pi of the read registration number i. It is determined whether or not it is within the entered determination area Wi. If the vehicle position is within the entry determination area Wi, step 2
At 60, the vehicle passes the determination circle Xi at step 310 described later.
When the flag FX that is set when the vehicle enters is set, it is determined whether the flag FX is set, and if the flag FX is set, the process as the entry guidance prohibition unit that ends the process is executed. If it is in the reset state, in the next step 270, a process as an approach guide means for guiding the vehicle occupant in the traveling direction of the vehicle at the registered intersection Pi is executed. To finish.

In step 270, for example, the registered intersection Pi is blinked on the road map displayed on the display device 14, and the traveling direction of the vehicle from the registered intersection Pi to the next registered intersection Pi + 1 (straight, Proceed the vehicle at the registered intersection Pi by following a procedure such as voice guidance (right turn, left turn, etc.) (for example, an electronic sound "Pingpong" followed by a synthetic sound "Please turn left at the next intersection") Give directions.

In step 270, the voice guidance in the traveling direction is performed only once when the vehicle enters the entry determination area Wi. That is, if the flag FX is in the reset state and the vehicle position is within the entry determination area Wi, the process of step 270 will be repeatedly executed each time the process is executed, but the process proceeds by voice. Direction guidance is provided only once when the vehicle enters the entry determination area Wi, and thereafter only the blinking display of the registered intersection Pi is performed.

Next, when it is determined in step 250 that the vehicle position is not within the entry determination area Wi, the process proceeds to step 290 and the vehicle position is the intersection Pi of the registration number i read in step 240. It is determined whether or not it is within the passage determination circle Xi set for. And
If the vehicle position is within the passage determination circle Xi, in step 300, processing is executed as passage guide means for guiding the vehicle occupant that the vehicle is passing the registered intersection Pi, and the next step 310 After setting the flag FX with,
The process ends.

In step 300, for example, the registered intersection Pi is blinked on the road map displayed on the display device 14, and a guide sound (for example, "Pong") indicating that the registered intersection Pi is passing is displayed. An electronic sound is generated to guide the passage of the registered intersection Pi.

On the other hand, when it is determined in step 290 that the vehicle position is not within the passage determination circle Xi, the process proceeds to step 320, and in step 280, guidance for entering the registered intersection Pi is provided. Flag F set at the time
It is determined whether W is set. Then, if the flag FW is in the reset state, the process is ended as it is, and if the flag FW is set, that is, the vehicle enters the registered intersection Pi along the planned traveling route, and at the registered intersection Pi. If the vehicle has already been guided in the traveling direction, the process proceeds to the following step 330, and whether the vehicle position has moved from the inside to the outside of the route deviation determination circle Yi set for the registered intersection Pi. Determine whether or not.

If it is determined in step 330 that the vehicle position has not moved from the inner side to the outer side of the route deviation determination circle Yi, the processing ends, and conversely, the vehicle position changes to the route deviation determination circle Yi. If it is determined that the vehicle has moved from the inside to the outside, the process proceeds to the following step 340, and it is determined whether or not the vehicle position is within the route deviation determination direction Zi set for the registered intersection Pi. . Then, when the vehicle position is within the route deviation determination direction Zi, it is determined that the vehicle is traveling normally along the planned travel route, the processing is ended, and the vehicle position is within the route deviation determination direction Zi. If it is determined that the vehicle is out of the planned traveling route, the process proceeds to step 350, and after performing a process as a route deviation guiding means for guiding that effect by voice, finish.

Finally, when it is determined in step 230 that the vehicle position does not exist in all the approach determination circles Vi set for each registered intersection Pi, in step 360 the flag FW is set. , FX is reset for initialization, and the process ends.

As described above, in the navigation system of this embodiment, before the vehicle travel route guidance, along the planned travel route set as the outward or return route for each registered intersection Pi on the planned travel route. , Approach judgment circle Vi, approach judgment area Wi, passage judgment circle Xi, route deviation judgment circle Y
i and the route deviation determination direction Zi are set respectively, and when the vehicle enters the entry determination area Wi, the vehicle occupant is informed of the traveling direction of the vehicle at the registered intersection Pi (steps 250 to 280). When the vehicle enters the passage determination circle Xi, the vehicle occupant is informed that the vehicle is passing through the registered intersection Pi (steps 290 to 31).
0).

Further, after the vehicle does not pass through the entry determination area Wi and directly enters the passage determination circle Xi, the vehicle occupant is informed that the vehicle is passing through the registered intersection Pi, and then the vehicle enters the entry determination area Wi. When entering Wi, register at intersection P
Prohibition of vehicle guidance in i (step 26)
0: YES).

Further, determination of the vehicle route deviation using the route deviation determination circle Yi and the route deviation determination direction Zi set as the escape determination area (steps 330 and 340).
Is performed only when the vehicle enters the registered intersection Pi along the planned travel route, that is, when the vehicle enters the entry determination area Wi and guides the traveling direction at the registered intersection Pi. When the vehicle directly enters the passage determination circle Xi without passing through Wi, determination of route deviation and guidance are not executed (step 320: NO).

Therefore, in the navigation system of this embodiment, for example, as shown in FIG. 4, the intersections of the addresses C1, C2, C5, ... Are sequentially set as the intersections on the planned traveling route. , The traveling mode of the vehicle (forward / return) when passing through the intersection of address C2
Then, according to the actual travel route of the vehicle, travel guidance is provided as shown in [Table 1].

[0043]

[Table 1]

That is, in the case where the traveling mode is the outward route and the vehicle should travel sequentially at the intersections of the addresses C1, C2 and C5,
At the intersection of the address C2, the entry determination area Wi is set on the side of the intersection of the address C1, and the route deviation determination direction Zi is set on the side of the intersection of the address C5. Therefore, the actual travel route is the same as the planned travel route C1 → C2 →
At the normal time of C5, when the traveling direction and the passing sound are guided at the intersection of the address C2, and the actual traveling route is C1 → C2 → C3, the escape direction from the intersection of the address C2 is different from the normal direction. Is the address C
At the intersection 2, the traveling direction and passing sound are guided as in the normal state, and route deviation guidance is also performed. Further, when a vehicle enters the intersection of the address C2 from the side of the intersection of the address C5 or the address C3 which is different from the planned traveling route, only a passing sound is generated at the intersection of the address C2, Guidance on traveling direction and route deviation is not executed.

On the other hand, the traveling mode is the return trip, and the address C
In the case of sequentially traveling at the intersections of C5, C2, and C1, at the intersection of the address C2, the entry determination area Wi is set to the intersection side of the address C5, and the route deviation determination direction Zi is set to the intersection side of the address C1. . Therefore, the actual travel route is the same as the planned travel route C5 → C2 → C
At the normal time of 1, at the intersection of address C2,
The traveling direction and passing sound are guided, and the actual travel route is C5.
When the direction of escape from the intersection of the address C2 is different from the normal time as in → C2 → C3, the traveling direction, the passing sound, and the route deviation are sequentially guided at the intersection of the address C2. Further, when a vehicle enters the intersection of the address C2 from the side of the intersection of the address C1 or the address C3, which is different from the planned traveling route, only a passing sound is generated at the intersection of the address C2, Guidance on traveling direction and route deviation is not executed.

Therefore, according to the navigation device of the present embodiment, when the vehicle is traveling along the planned traveling route along the traveling direction indicated by the registration number i of the registered intersection Pi, each registered intersection Pi In the case where the vehicle deviates from the planned traveling route, it is possible to give a notification to that effect by providing guidance in the traveling direction of the vehicle and passage guidance at each registered intersection Pi.
The vehicle follows the planned route with the registration number i of the registered intersection Pi.
When the vehicle is traveling in the direction opposite to the traveling direction represented by, only the passage guidance at each registered intersection Pi is performed, and the deviation from the planned traveling route or the traveling direction at each registered intersection Pi is erroneously guided. Can be prevented.

That is, according to the navigation system of this embodiment, even if the vehicle occupant drives the vehicle in the opposite direction from the destination to the departure side on the planned travel route without setting the return mode. The traveling direction of the vehicle is not distorted by the vehicle occupants without guiding the traveling direction at each registered intersection Pi in a direction different from the actual direction after passing the registered intersection Pi or guiding the vehicle route deviation. You can guide without giving.

[0048]

As described above in detail, according to the vehicle travel route guiding apparatus of the present invention, when the vehicle is traveling on the planned traveling route from the departure place toward the destination, the traveling plan is planned. If the vehicle occupant is informed of the traveling direction and the passing state of the vehicle at each intersection on the route, and if the vehicle escapes from each intersection in a direction different from the planned traveling route, it is possible to inform the vehicle occupant of that fact. it can. Also, when the vehicle is traveling in the opposite direction from the destination to the place of departure on the planned traveling route, the vehicle occupants are merely informed of the passing state at each intersection on the planned traveling route. Thus, it is possible to prevent erroneous guidance of the traveling direction of the vehicle or the deviation of the traveling route at each intersection. Therefore, according to the present invention, it is possible to accurately guide the traveling route of the vehicle without giving the vehicle occupant a feeling of strangeness.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a configuration of the present invention.

FIG. 2 is a block diagram showing the overall configuration of the vehicle navigation device of the embodiment.

FIG. 3 is an explanatory diagram showing intersection data stored in an external storage device.

FIG. 4 is an explanatory diagram illustrating a display state of a road map on a display device.

FIG. 5 is a flowchart showing a guidance initial setting process executed by the control device.

FIG. 6 is an explanatory diagram showing various areas set for a registered intersection Pi by a guidance initial setting process.

FIG. 7 is a flowchart showing a travel route guidance process executed by the control device.

[Explanation of symbols]

2 ... GPS receiver 2a ... GPS antenna 4 ...
Input device 6 ... External storage device 12 ... Alarm device 14 ... Display device 20 ... Control device Vi ... Approach determination circle Wi ... Approach determination area Xi ...
Pass judgment circle Yi ... Route deviation judgment circle Zi ... Route deviation judgment direction

Claims (1)

[Claims] 1. A display unit for displaying a road map, a map data storage unit for storing map data representing the road map and a planned travel route of the vehicle on the road map, and a vehicle position for detecting the vehicle position. A detection means; and a display control means for displaying a road map on the display means based on the map data, and displaying the planned traveling route and the vehicle position on the road map in a distinguishable manner. In the travel route guidance device, for each intersection on the planned travel route, an entry determination region when the vehicle enters the intersection along the planned travel route,
An area for setting a passage determination area for determining that the vehicle has passed through the intersection, and an escape determination area for determining whether or not the vehicle is along the planned traveling route when the vehicle exits the intersection. Based on the setting means and the vehicle position, it is determined whether the vehicle has entered the entry determination area set by the area setting means. If the vehicle enters the entry determination area, the entry Entry guide means for guiding the vehicle occupant in the traveling direction of the vehicle at the intersection corresponding to the judgment area, and whether or not the vehicle has entered the passage judgment area set by the area setting means based on the vehicle position. If it is determined that the vehicle has entered the passage determination area, the passage guide means for guiding the vehicle occupant that the vehicle is passing the intersection corresponding to the passage determination area, and the passage guide means for passing the intersection. guide After that, when the vehicle enters the approach determination area of the intersection, the approach guidance prohibiting means for prohibiting the guidance operation by the approach guiding means, and the approach guidance means for guiding the traveling direction to the intersection where the vehicle entered Then, using the escape determination region of the intersection set by the region setting means, it is determined whether or not the vehicle has escaped from the intersection along the planned traveling route, and the vehicle travels in the traveling direction. A travel route guide device for a vehicle, comprising: a route deviation guide means for guiding a vehicle occupant of a deviation from the planned travel route of the vehicle unless the vehicle has escaped along the planned route.