JPH09311048A - Travel position display device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a traveling position display device that displays a vehicle position on a screen together with a map, and to appropriately guide the traveling route when traveling the route. SOLUTION: A traveling locus storage means 41 for reading and storing past traveling loci of a vehicle, a stored distance between traveling loci, and an angle when a straight line connects each traveling locus satisfy predetermined conditions. In this case, there are provided guidance point setting means 42 for setting guidance points, and voice guidance means 43-45 for performing guidance by voice according to the distance of the vehicle position with respect to each guidance point in the set guidance point setting order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling position display device for displaying the present position of a vehicle on a display screen together with a map, and particularly when automatically traveling on a route that has been traveled in the past, the route guidance is automatically provided. The present invention relates to a traveling position display device that can be performed.

[0002]

2. Description of the Related Art FIG. 13 is a block diagram of a vehicle-mounted traveling position display device. This device includes a device main body 1 installed in a trunk room of an automobile, a liquid crystal display 2 installed in the car for displaying a map and a current traveling position of the vehicle, and a remote controller 3 for controlling a display mode of the liquid crystal display 2. , A CD-ROM driver 5 for reading the map data from the CD-ROM 4 storing the map data
And GPS (Global Positioni) to obtain the position (latitude, longitude) of the receiving point by receiving radio waves transmitted from multiple satellites.
ng System) receiver 6, azimuth sensor 7 that detects the relative traveling azimuth of the vehicle by the vibration gyro, distance sensor 8 that generates a pulse signal according to the rotation speed of the wheel, and ON / OFF of the brake switch, parking switch, etc. It is composed of various other sensors 9 for detecting an off signal and the like.

The device body 1 is a CPU for performing various controls.
(Central processing unit) 11 centered on a program ROM 12 in which a control program executed by the CPU 11 is stored, a D-RAM 13 storing various data input from the outside and processing results in the CPU 11, when power supply is stopped It has an S-RAM 14 that functions as a backup memory for holding the data required for.

Further, a kanji / font ROM 15 in which patterns such as characters and symbols to be displayed on the liquid crystal display 2 are stored, an image processor 16 which forms a display image based on map data, current position data of the vehicle, etc. An image memory that stores an image for synthesizing map data and current position data output from the image processor 16 and Chinese characters / fonts such as place names and road names output from the ROM / font ROM 15 and displaying them on the liquid crystal display 2 ( V-RAM) 17, an RGB conversion circuit 18 for converting output data of the V-RAM 17 into color signals and outputting the color signals to the liquid crystal display 2.

Further, the CD-ROM driver 5 and G
It has a communication interface 19 connected between the PS receiver 6 and the CPU 11 to control transmission and reception of data, and a sensor signal processing unit 20 connected between the sensors 7 to 9 and the CPU 11 to process sensor signals. There is.

FIG. 14 is a format diagram of map data stored in the CD-ROM 4, in which a disk label 21, drawing parameters 22, drawing leaf management information 23, drawing leaf data 24, etc. are read from the top (left of the drawing) direction. It is stored.

The map leaf data 24 stores data for each unit map obtained by dividing a topographic map of Japan by latitude and longitude, and describes a narrow region in detail from a level 2 map leaf that roughly describes a wide region. It stores up to the level 0 map leaf. Further, the map leaf data 24 is composed of view sets A, B, C, and D each describing the same region. The view set A includes B, the view set B includes C, and the view set C includes D. Is described in more detail.

Each view set A, B, C, D is composed of view set management information and a plurality of units. Each unit describes a divided area obtained by dividing the area of the corresponding view set into a plurality of areas, and includes a unit header, a character layer, a background layer, a road layer, an option layer, and the like.

Character data such as place names, road names and facility names to be displayed on the map are stored in the character layer, and background data for drawing roads, facilities and the like are recorded in the background layer. The layer stores data on coordinate points (nodes) and lines (links) that describe roads including intersections, for example, road data such as node numbers, latitudes, longitudes, link numbers, and distances.

FIG. 15 is a diagram showing the relationship between nodes and links. Circles represent nodes and lines between the nodes represent links. Also, the circle with the node number 4 represents an intersection node. The data stored in the road layer is not directly involved in the map display and is used as road network information such as map matching.

In this configuration, the output from the azimuth sensor 7 and the output from the distance sensor 8 are the sensor signal processing unit 2.
When it is sent to the CPU 11 via 0, the CPU 11 calculates the current position of the vehicle and obtains the latitude and longitude of the current position. Further, the current position is corrected based on the data from the GPS receiver 6.

Based on the current position thus obtained, the CD-
The map data of the unit corresponding to the current position is read from the ROM 4 and stored in the D-RAM 13. D-RAM1
A part of the map data stored in 3 is read by the CPU 11, converted into image data by the image processor 16, and written in the V-RAM 17.

The image data written in the V-RAM 17 is converted into color signals by the RGB conversion circuit 18 and sent to the liquid crystal display 2. As a result, the liquid crystal display 2 displays a map of a predetermined range centered on the current position.

If the map data read from the D-RAM 13 includes a character code or a symbol code,
The patterns corresponding to these character codes and symbol codes are read out from the Chinese character / font ROM 15, and the liquid crystal display 2 displays characters such as place names and symbols such as schools together with the map. In addition, the current position of the vehicle displayed on the liquid crystal display 2 is sequentially changed based on the traveling speed and the traveling direction that are sequentially obtained as the vehicle travels.

FIG. 16 shows a display example on the liquid crystal display 2. The road map is displayed, and the place name, the intersection name, the road name, etc. are displayed. Arrows in the figure are vehicle marks 31 indicating the current position and traveling direction of the vehicle, and black circles are trajectory marks 32 indicating the traveling trajectory of the vehicle.

[0016]

In the above-mentioned traveling position display device, when an attempt is made to travel on the same road along the route once traveled, conventionally, the driver follows the trajectory mark 32 displayed on the liquid crystal display 2. Was driving blindly. For this reason, the driver has to drive while looking at the road and the display screen alternately while driving, and such an action is very troublesome when driving.

The present invention has been made to solve such a problem, and provides a traveling position display device capable of appropriately guiding a route that has been traveled in the past. With the goal.

[0018]

In a traveling position display device of the present invention, a traveling locus storing means for reading and storing past traveling loci of a vehicle, a distance between the stored traveling loci and each traveling locus. Guidance point setting means for setting a guidance point when the angles when connecting the lines with a straight line each satisfy a predetermined condition, and by voice according to the distance of the vehicle position with respect to each guidance point in the order of setting the guidance points set above. A voice guidance means for providing guidance is provided.

According to the present invention, it is possible to obtain a traveling position display device capable of appropriately guiding a route that has been traveled in the past.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a traveling position display device for displaying the present position and traveling locus of the own vehicle on a map screen corresponding to the present position of the own vehicle. A guide point is set when the travel locus storage means for reading out and storing the past travel loci, the distance between the stored travel loci, and the angle when the travel loci are connected by a straight line satisfy predetermined conditions. The guide point setting means and the voice guide means for performing voice guidance according to the distance of the vehicle position with respect to each guidance point in the setting order of the set guidance points are provided, and voice guidance is provided for each guidance point. By doing so, it is possible to travel along the past travel locus.

According to a second aspect of the present invention, in the first aspect of the invention, the guiding point setting means is such that the distance between the traveling loci is within a fixed distance, and the nth and n + 1th of the traveling loci. When the angle formed by the straight line connecting the lines and the straight line connecting the n + 1th and n + 2ths exceeds a certain value, a guidance point is set on the n + 1th locus, or n + 2 and the straight line connecting the nth and n + 1th loci of the traveling locus. If the angle formed by the line connecting the nth line and the n + 3th line exceeds a certain value, the guidance point is set at the intersection of both lines, and the exit direction with respect to the approach direction is a certain angle or more. In case of, set the guidance point.

According to a third aspect of the present invention, in the first aspect of the invention, the voice guidance means uses voice in accordance with the distance of the vehicle position and the escape angle with respect to each guidance point in the order in which the guidance points are set. The guidance is provided, and the remaining distance and the escape direction are guided by voice for each guidance point.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing an embodiment of a traveling position display device according to the present invention, and FIG.
The same components as those shown in are designated by the same reference numerals, and detailed description thereof will be omitted.

The traveling position display device according to the present embodiment is
A locus memory 41 as a running locus storage unit that stores a running locus to be guided in the apparatus body 1, a guiding point memory 42 as a guiding point setting unit that stores a locus that is a point from this running locus as a guiding point,
A guide phrase memory 43 that stores various guide phrase data and a voice signal forming circuit 44 that forms a voice signal for the guide phrase based on the guide phrase data are connected to each other via a bus. Further, a speaker 45 that outputs a voice signal for a guidance phrase is connected to the voice signal forming circuit 44, and other configurations are the same as those of the traveling position display device shown in FIG. The guide phrase memory 43, the voice signal forming circuit 44, and the speaker 45 form a voice guide means.

Next, the operation for automatically guiding the route when using the traveling position display device having the above-mentioned structure to drive on the same road along a route that has been traveled in the past will be described. .

(Setting of Guidance Point) First, setting of the guidance point will be described with reference to the flowchart shown in FIG. The guide point is set in the trajectory memory 41.
This is performed when the locus data stored in is displayed on the liquid crystal display 2.

First, the CPU 11 sets a variable n representing the number of the running locus and a variable N representing the number of the guide point to an initial value 1 (step S1), and the n of the locus memories 41 to n are set.
The locus data of the th, the n + 1 th, the n + 2 th, and the n + 3 th are read out (step S2).

Next, a straight line a connecting the nth locus and the n + 1th locus, a straight line b connecting the n + 1th locus and the n + 2nd locus, and a straight line connecting the n + 2nd locus and the n + 3th locus. Assume that c is (step S3). Then, it is determined whether or not the length of the straight line a, the length of the straight line b, and the length of the straight line c are each 50 to 200 m (step S).
4).

This is because the running locus is 100 from the running of the own vehicle.
Although it is sampled every m, the traveling locus itself may be disturbed due to erroneous matching or the like. Therefore, when the length of the straight line connecting the loci is 50 m or less or 200 m or more, it is determined that the traveling locus is disturbed and the guidance point is not set.

When the straight lines a to c are 50 to 200 m,
An angle θ1 formed by the straight line a and the straight line b is obtained (step S
5). The angle θ1 is ± 30 ° (+ clockwise in the traveling direction counterclockwise)
If it is more than minus (clockwise) (step S
6), the n + 1th locus is set as the guide point and the guide point number is set as N and stored in the guide point memory 42 (step S7).

Next, 1 is added to the variable N representing the guidance point number (step S8), and 1 is added to the variable n representing the number of the running locus (step S9). Next, it is determined whether or not the next traveling locus is the end point (step S10). If the end point is the end point, the process is ended, and if it is not the end point, the processes from step S2 onward are repeated.

In FIG. 3, an angle θ1 formed by a straight line a connecting the nth locus and the n + 1th locus and a straight line b connecting the n + 1th locus and the n + 2th locus exceeds ± 30 °. In this case, the guide point is set on the (n + 1) th locus.

Returning to FIG. 2, when the lengths of the straight lines a and b are 50 m or less or 200 m or more in step S4, the guidance point is not set, and the process jumps to step S9. If the angle θ1 formed by the straight line a and the straight line b is within ± 30 ° in step S6, the angle θ2 formed by the straight line a and the straight line c is obtained (step S11). Angle θ2 is ± 3
If it exceeds 0 ° (step S12), the intersection of the straight line a and the straight line c is set as the guide point, and the guide point number is stored as N in the guide point memory 42 (step S13).

Next, 1 is added to the variable N representing the guide point number (step S14), 2 is added to the variable n representing the number of the running locus (step S15), and step S1
Shift to the process of 0. If the angle θ2 formed by the straight line a and the straight line c is within ± 30 ° in step S12, the process jumps to step S15.

In FIG. 4, an angle θ2 formed by a straight line a connecting the nth locus and the n + 1th locus and a straight line c connecting the n + 2nd locus and the n + 3th locus exceeds ± 30 °. In this case, a state in which a guidance point is installed at the intersection of the straight line a and the straight line c is shown.

The guide points thus obtained are numbered in order from the beginning of the traveling locus, and guidance is performed in this order. In setting the destination, the end point of the traveling locus is automatically set as the destination when calling from the locus memory 41.

FIG. 5 shows a guide mark Ma (FIG. A) showing a guide point displayed on a map and a destination mark Mb (FIG. B) showing a destination. The guide mark Ma is represented by a shape that can identify the approach direction and the exit direction. When the map rotates, this mark rotates the arrow in the entry direction and the arrow in the exit direction according to the rotation angle. The guidance point number is always displayed so as to be upright. The destination mark Mb is displayed at the coordinates of the end point read from the trajectory memory. The destination mark Mb is displayed so as to always be upright even when heading up.

Next, details of the guidance provided by using the guidance points set in this way will be described. The guidance by the guidance point is activated when the locus data stored in the locus memory 41 is read on the map, and is automatically set by voice when the own vehicle approaches the guidance point.

(Direction Guidance) First, directional guidance, which is the basis of guidance guidance, will be described. In this guidance, guide phrase data is read from the guide phrase memory 43 according to the angle θ of the exit direction with respect to the approach direction, converted into a voice signal by the voice signal forming circuit 44, and the following guide voice phrase is output from the speaker 45. Is output. This will be described with reference to FIG.

First, FIG. 7A shows an angle θ between the approach direction and the exit direction, and a guide phrase as shown in FIG. 9B is output according to this angle θ. That is, when the angle θ is between 30 ° and 45 °, the guidance phrase is “diagonal left direction” in the + direction and “diagonal right direction” in the − direction. Also, the angle θ is 45
In the case of ゜ to 135 ゜, the guidance phrase "Left direction" if the direction is +, and "Right direction" if the direction is-is used. + When the angle θ is 135 ° to 170 °
If it is a direction, the guidance phrase is "Greatly to the left", and if it is the-direction, "It is to the right". If the angle θ is between 170 ° and 180 °, it is a U-turn.
Guide with a guidance phrase. These guide phrases are called direction phrases and are collectively shown in FIG. If the angle θ is less than 30 °, the guidance point is not set as described above, so there is no guidance.

(Simple Branching Guide) Next, the simple branching guide will be described. This guidance is provided when the approach direction is within ± 15 ° of the approach angle of the guidance point as shown in FIG. 7 (a). Then, depending on the remaining distance to the guidance point, for example, when the remaining distance is 750 m, “about 700 m”, and when the remaining distance is 350 m, “about 3 m”, as shown in FIG.
In the case of "00 m" and 150 m, the remaining distance phrase "soon" is entered, and then the direction phrase described above is entered according to the angle θ of the escape direction. For example, the remaining distance is 3
When the escape direction is + 40 ° at 50m, it is "about 300m.
It is diagonally to the right. "

(Section Guidance) Next, section guidance will be described. This guidance is a function of outputting information about the next guidance point after passing through the guidance point. As shown in FIG. 8A, the guidance point enters a passage determination circle with a radius of 100 m with respect to the current guidance point, When the vehicle is separated, the following guidance is given according to the linear distance L to the next guidance point, as shown in FIG.

That is, the distance L to the next guidance point
Is 3.5 to 4.5 km, "about 4 km",
In the case of 2.5 to 3.5 km, "about 3 km", 1.
Approximately 2 km for 5 to 2.5 km, 950 m
In the case of ~ 1.5 km, the remaining distance phrase of "about 1 km" is entered. Then, the above-mentioned direction phrase corresponding to the escape direction angle θ is entered. If it is 4.5 km or more, it is far, and if it is 950 m or less, there is a simple branch guidance, so there is no guidance.

(Request Guidance) Next, request guidance will be described. This guidance is a function to output a guidance voice by a switch input from the user during trajectory guidance.
As shown in (a), the guidance about the next guidance point with respect to the position of the own vehicle when the switch input is performed,
This is performed as shown in FIG.

That is, the distance L to the next guidance point
Is 3.5 to 4.5 km, "about 4 km",
In the case of 2.5 to 3.5 km, "about 3 km" ...
・ In case of 380-450m, "about 400m",
In the case of 280 to 380m, "about 300m", 18
In the case of 0 to 280 m, "about 200 m", 0 to 18
If it is 0m, the remaining distance phrase "soon" is entered. Then, the above-mentioned direction phrase is entered according to the angle θ of the escape direction.

If the distance is 4.5 km or more, no guidance is given because there is still a distance. Also, 380m marked with *
The following cases are added when there are continuous branches or multiple branches described later.

(Section Arrival Guidance) Next, section arrival guidance will be described. This guide is a guide provided when approaching the arrival point in the above-described simple branch guidance, section guidance, and request guidance. As shown in FIG. 10A, there is no guide point ahead and the distance to the arrival point. Is 550
This is the case of m or more. FIG. 11B shows a guide phrase in the section arrival guide.

That is, the distance L to the arrival point is 3.5.
~ 4.5km "about 4km", 2.5 ~
In the case of 3.5 km, "about 3 km", 1.5-2.
Approximately 2 km for 5 km, 950 m-1.5
In the case of km, "about 1 km", in the case of 850-950 m, "about 900 m", ..., 550-650
In the case of m, the remaining distance phrase "about 600 m" is entered. Following that, a guide phrase "I'm around my destination" appears. If the distance is 4.5 km or more, no guidance will be given because there is still a distance.

(End Arrival Guide) Next, the end arrival guide will be described. As shown in FIG. 11, this guidance is performed when the own vehicle approaches within a radius of 300 m centered at the arrival point and within a radius of 100 m centered at the arrival point. However, this is also done when the vehicle passes the guidance point immediately before the arrival point or when the guidance target is the arrival point.

When the vehicle approaches within a radius of 300 m around the arrival point, a guide phrase "Soon to be the destination" is entered. Furthermore, when approaching within a radius of 100 m, a guidance phrase "Around the destination. Voice guidance will be terminated" will be entered. In addition, 40 minutes from the arrival point after giving the guidance "I will be around the destination soon"
If the distance is not more than 0 m, the end arrival guide will not be given again. After the end arrival guide, the guide is canceled. To start the guidance again, the trajectory guidance must be selected again.

(Continuous branch guidance and multiple branch guidance) Next, continuous branch guidance and multiple branch guidance will be described. The above-mentioned simple branch guidance handles each guidance point independently, but continuous branch guidance treats two consecutive guidance points as continuous ones, and multiple branch guidance treats two consecutive guidance points as one. deal with.

Specifically, as shown in FIG.
When the distance L between two consecutive guidance points exceeds 750 m, the simple branch guidance is used, when it is 150 to 750 m, the continuous branch guidance is used, and when it is less than 150 m, the multiple branch guidance is used.

The continuous branch guide or the multiple branch guide is the first
In addition to the phrase of simple branch guidance for guidance points,
A phrase for continuous branch guidance or multiple branch guidance for the second guidance point as shown in FIG. For example, output the phrase "I'm licking right at about 300m" for simple branch guidance, followed by the phrase "It's right at XXm ahead" or the phrase "I'm right ahead at XXm" for continuous branch guidance. To do.

In this way, the continuous branch guidance is "Beyond ○○ m
It consists of a remaining distance phrase such as “de” and a direction phrase such as “to the right”. ◯ m of the remaining distance phrase expresses the linear distance from the first guidance point to the second guidance point in units of 10 m. Similarly for multi-branch guidance, the remaining distance phrase such as "Beyond" and "It is in the right direction"
And the direction phrase.

Assuming that a sentence consisting of a remaining distance phrase and a direction phrase is one sentence, basically one guidance is 2
Up to a sentence. However, when the second guidance point and the third guidance point have a multiple branch relationship, and the first guidance point and the second guidance point also have a multiple branch relationship, up to three sentences are output. In that case, the third sentence is common to all, and "the branch continues."

If the third guiding point and the fourth guiding point are in a continuous branching or multi-branching relationship, the second
After passing through the guidance point, guidance will be provided according to each condition.

If the guidance for the first guidance point includes guidance more than twice depending on the remaining distance, the guidance for the second guidance point is added only to the final guidance. However, request information is not included in the number of times.

(Change of Guide Point) Next, change of the guide point will be described. The guidance by the guidance point is automatically performed in the order of the numbers by the passage determination of the guidance point, but the order can be manually advanced.

The display of the current location screen during the route guidance basically displays the same display items as the screen during the route guidance, but the arrow toward the destination points to the end point of the trajectory memory, and the remaining distance display field is displayed. Indicates the straight line distance to the end point of the trajectory memory, and the next intersection display field indicates the number of the next guidance point and the straight line distance to that point.
The guidance function of the guidance point is terminated when the destination is approached within 100 m or when the display of the trajectory memory is stopped.

[0060]

According to the present invention, it is possible for the user to safely and accurately follow the same route by automatically guiding the traveling locus that the vehicle has traveled once and recorded. Has the effect of

[Brief description of drawings]

FIG. 1 is a block diagram of a traveling position display device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a procedure for setting a guide point.

FIG. 3 is an explanatory diagram showing a state of setting a guide point.

FIG. 4 is an explanatory diagram showing a state of setting a guide point.

FIG. 5 (a) is a display diagram of a guide mark showing a guide point displayed on a map screen. (B) is a display diagram of a destination mark showing a destination.

6A and 6B are explanatory views of direction guidance, in which FIG. 6A is a diagram showing an angle θ in an exit direction with respect to an approach direction, and FIG. 6B is an angle θ.
Showing direction phrases for, (c) shows them together

7A and 7B are explanatory diagrams of simple branch guidance, FIG. 7A is a diagram showing conditions for performing simple branch guidance, and FIG. 7B is a diagram showing guidance phrases.

8A and 8B are explanatory diagrams of section guidance, in which FIG. 8A is a diagram showing conditions for performing section guidance, and FIG. 8B is a diagram showing guidance phrases.

9A and 9B are explanatory diagrams of request guidance, in which FIG. 9A is a diagram showing conditions for performing request guidance, and FIG. 9B is a diagram showing guidance phrases.

10A and 10B are explanatory diagrams of section arrival guidance, FIG. 10A is a diagram showing conditions for performing section arrival guidance, and FIG. 10B is a diagram showing guidance phrases.

FIG. 11 is an explanatory diagram of end arrival guide.

12A and 12B are explanatory diagrams of continuous branch guidance and multiple branch guidance, in which FIG. 12A is a diagram showing conditions for performing each branch guidance, and FIG. 12B is a diagram showing guidance phrases.

FIG. 13 is a block diagram of a conventional traveling position display device.

FIG. 14 is a format diagram of map data stored in a storage device.

FIG. 15 is a diagram showing the relationship between nodes and links.

FIG. 16 is a diagram showing a display example of a vehicle mark and a track mark.

[Explanation of symbols]

 1 Device Main Body 2 Liquid Crystal Display 4 CD-ROM 11 CPU 41 Locus Memory 42 Guidance Point Memory 43 Guidance Phrase Memory 44 Voice Signal Forming Circuit 45 Speaker

Claims (3)

[Claims] 1. A traveling position display device for displaying the current position and traveling locus of the own vehicle on a map screen corresponding to the present position of the own vehicle, a traveling locus storing means for reading and storing past traveling loci of the own vehicle. And a guide point setting means for setting a guide point when the stored distance between the travel trajectories and the angle when the travel trajectories are connected by a straight line satisfy predetermined conditions, and the setting of the set guide point. A traveling position display device, comprising: a voice guidance unit that sequentially provides voice guidance according to the distance of the vehicle position to each guidance point. 2. The guide point setting means is such that an angle formed by a straight line connecting the nth and (n + 1) th and a straight line connecting (n + 1) th and (n + 2) th of the traveling locus is such that the distance between the respective traveling loci is within a certain distance. N exceeds a certain value
If a guide point is set on the + 1st locus, or if the angle formed by the straight line connecting the nth and n + 1th loci of the traveling locus and the line connecting the n + 2nd and n + 3rd loci exceeds a certain value, The traveling position display device according to claim 1, wherein a guide point is set. 3. The running position display according to claim 1, wherein the voice guidance unit provides voice guidance in accordance with the distance of the vehicle position and the escape angle with respect to each guidance point in the order in which the guidance points are set. apparatus.