JP2526006B2 - Running track display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling locus display device for guiding a vehicle by displaying a road map, a traveling locus of a vehicle and a current position.

[0002]

2. Description of the Related Art Conventionally, as a traveling locus display device of this type, a current position calculating means including a GPS receiver for calculating the current position of a traveling vehicle is provided, and the vehicle based on the output from the calculating means. The current position of the vehicle is displayed on the road map of the display, and the traveling locus of the vehicle is highlighted on the road map by changing the brightness and density of the display color so that the vehicle travels on the forward and backward paths. There was a technique to guide. On the return trip from the destination to the departure point, the vehicle traveling path on the outward route is stored in the memory, and the stored traveling path on the outward route is displayed on the display to reverse the outward path. They were giving guidance on the return trip that runs in the direction.

[0003]

In such a conventional running locus display device, the running locus of the vehicle is merely highlighted, and therefore, from the current position and running locus of the vehicle on the display, It was not easy to visually recognize the traveling distance of the vehicle or the traveling direction of the vehicle.

That is, in such a conventional device, since it is not easy to visually recognize the traveling distance of the vehicle, the driver cannot grasp the traveling distance from the departure place to the present place during traveling and the driver cannot I was sometimes anxious. Further, in the conventional device, since the traveling locus is merely highlighted, the accuracy of calculation of the current position by, for example, the GPS receiver decreases on the return route, and the actual vehicle continues traveling in the traveling direction. If the current position of the vehicle moves backward on the highlighted running path on the display, it is not possible to know whether the actual traveling direction of the vehicle is the front or back of the running path, and the display on the display may be incorrect. In some cases, the driver misunderstood the actual traveling direction of the vehicle based on the display of the current position, lost the way and was unable to return to the starting point.

Therefore, the present invention was created for the purpose of providing a traveling locus display device in which it is easy to visually recognize the traveling distance and traveling direction of a vehicle.

[0006]

The present invention is illustrated in FIG.
As shown in FIG.
Roads with different scales for displaying map length
Arbitrary from a predetermined storage means that stores multiple types for each map
The map data of the scale of is read and based on the map data
The road map and scale length, including the current vehicle position
A travel locus display device for displaying together with a row locus, including position detection means for detecting the current position of the vehicle, direction detection means for detecting the traveling direction of the vehicle, and distance calculation means for calculating the travel distance of the vehicle. , The minimum road map of the road map stored in the storage means based on the output from the distance calculation means .
The passing point of the vehicle at the mileage interval corresponding to the kale length
And detects, for each passing point of the detected, the traveling direction of the vehicle at the position and vent over point of the passing point, calculated on the basis of the output from said position detecting means and the direction detecting means, the calculated output results Is stored as passing point data, and the passing point detecting means and the map data stored in the storing means.
Based on the data, the display means can display a road map of any scale and
And the scale length of the road map is displayed and
On the displayed road map, the road is
By the running distance interval corresponding to the scale length of the alley view, draw a mark representing the traveling direction of the vehicle at the position and the passing point of the passing point of the vehicle, based on an output from said position detecting means so 併 Display control means for displaying the current position of the vehicle.

[0007]

In the travel locus display device of the present invention,
In this case, the position detecting means detects the current position of the vehicle, the direction detecting means detects the traveling direction of the vehicle, the distance calculating means calculates the traveling distance of the vehicle, and the passing point detecting means calculates the distance.
Road area stored in the storage means based on the output from the means
At the mileage interval corresponding to the minimum scale length in the figure,
Detects transit points, and for each detected transit point
, The position of the passing point and the way the vehicle is traveling at the passing point
Direction based on the output from the position detection means and the direction detection means.
Calculated and stored the calculation result as transit point data
I do. Then, the display control means sets the location stored in the storage means.
Based on the map data, the road map and map of any scale can be displayed on the display.
And the scale length of the road map is displayed and passing
Based on the passing point data detected and stored by the point detection means
Then, the scale of the road map is displayed on the displayed road map.
The position of the passage point of the vehicle at the mileage interval corresponding to the length
And a mark indicating the traveling direction of the vehicle at the passing point
The vehicle is drawn based on the output from the position detection means.
Display the current position of.

Therefore, according to the traveling locus display device of the present invention,
For example, the vehicle is displayed on the road map currently displayed on the display means.
Every time the vehicle travels a distance corresponding to the kale length, a mark indicating the position of the passing point and the traveling direction of the vehicle at the passing point is drawn on the road map being displayed. As a result, the car
Both drivers, the number of marks drawn on the road map of the display means
With the scale length, the traveling distance of the vehicle can be easily and accurately grasped, and the vehicle can continue traveling with peace of mind while visually recognizing the distance from the departure place to the present location.

Further, in the present invention, since the mark drawn on the road map displayed by the display means represents the traveling direction of the vehicle at the passing point, it is possible to easily recognize the traveling direction of the vehicle based on the mark. You can Therefore, for example, even if the accuracy of detection of the current position by the position detection means is lowered for some reason on the return trip, and the display of the current position on the road map displayed by the display means goes back the traveling locus of the vehicle, Since the mark drawn for each point represents the traveling direction of the vehicle, the driver can recognize the correct traveling direction of the vehicle based on the mark and easily return to the departure place. Furthermore, in the present invention, the
The passing point is the minimum scale of the road map stored in the storage means.
It is detected at the mileage interval corresponding to the
Memorized passing points as passing point data
Based on the passing point data, the scale of the displayed road map
Draw passing points at mileage intervals corresponding to the roll length
The display control means displays on the display means.
When the scale of the road map is changed, it is displayed on the display.
The interval between passing points is also the scale of the changed road map.
It will be switched according to the length of the rule. For this reason,
For example, even if the driver gets lost while the vehicle is running,
Change the scale of the road map displayed by the display control means on the display means
If you display an enlarged road map near the current location,
The line trajectory corresponds to the scale length of the changed road map.
Will be displayed at shorter mileage intervals,
Even in this display, the traveling direction of the vehicle at each passing point is
Learn more about how you're driving to understand
You can easily and intuitively grasp the travel route and correct it easily.
Like Then, drive to correct the travel route
When you return on a road that came
The distance can be easily and accurately grasped from the number of
Therefore, the shortest route necessary for route correction can be easily and quickly
Can be found.

[0010]

Embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described in detail below, and includes all embodiments that can be conceived by those skilled in the art without departing from the gist of the present invention.

In order to guide the driver's driving by displaying the current position of the mounted vehicle and the running locus, FIG.
FIG. 1 is a block diagram showing an overall configuration of a navigation device 1 of this embodiment, which is configured separately from a vehicle to be mounted and is retrofitted. As shown in FIG. 2, the navigation device 1
Is a GPS that receives radio waves transmitted from a satellite (NAVSTAR) for GPS (Global Positioning System)
Equipped with an antenna 2a for frequency conversion of the received signal,
It demodulates to calculate latitude data, longitude data, and altitude data representing the position of the receiving point (that is, the current position), and at the same time, calculates speed data and moving direction (true A GPS receiver 2 known as a position detecting means and a direction detecting means for calculating azimuth data representing an angle measured clockwise from north), a keyboard for inputting various data by an external operation, and a display on the display device 8. An input device 4 including a touch key provided on the screen, an external storage device 6 including an optical disk and a magnetic disk storing map data, a CRT for displaying a road map and various messages, a liquid crystal display, etc. Various data are read from the display device 8 as the display means, the GPS receiver 2, the input device 4, the external storage device 6 and the like, and the data is read. And a control unit 10 for driving and controlling the display unit 8 based.

Further, the control device 10 includes a CPU 12, R
OM14, RAM16 which functions as a storage means together with the above-mentioned external storage device 6 by storing trajectory data for drawing a traveling trajectory on a road map as described later,
I / O port 18, bus line 20 connecting these parts,
And a display drive device 22 for controlling the display screen of the display device 8 based on the output signal from the input / output port 18, and is configured as a well-known microcomputer.

In the navigation device 1 thus constructed, when the power is turned on, the CPU 12 reads the map data including the current vehicle position from the external storage device 6 and, as shown in the upper part of FIG. Based on the map data, a road map is displayed on the display screen of the display device 8 together with the departure point Ps of the vehicle. Then, when the vehicle is started, the control device 10 displays the current position and the traveling direction of the vehicle by the procedure according to the flowchart shown in FIG.
It is displayed on the road map and the running locus display process is executed to draw the locus mark indicating the passing point and the traveling direction at the passing point on the road map for each mileage corresponding to the scale length of the road map. To do.

The traveling locus display processing will be described below with reference to FIG. When this processing is started, first, step S
At 2, the longitude data xi and latitude data yi representing the current position of the vehicle and the azimuth data θi representing the traveling direction of the vehicle are read from the GPS receiver 2, then the process proceeds to step S4, and these longitude data xi, latitude data yi and azimuth data are read. Based on θi, the current position Pn of the vehicle is displayed on the road map of the display device 8 in a slightly larger triangle as shown in the middle part of FIG.
And the direction of travel are displayed. In the triangle, the tip direction along the road represents the traveling direction of the vehicle.

Further, the traveling distance mi of the vehicle is calculated in step S6, and in the following steps S8 to S12, the minimum scale length which is the scale length of the most detailed road map in the map data stored in the external storage device 6 by the vehicle. Every time the vehicle travels 100 m, as shown in FIG. 5, the latitude data Y and the longitude data X of the passing point T of the vehicle, and the azimuth data Θ representing the traveling direction of the vehicle at the passing point T are used as the passing point data in the backup RAM. In addition, the position and the progress of the vehicle passage point are stored for every 500 m of the scale length of the road map displayed on the display device 8 based on the passage point data, as shown by a small triangle in the middle of FIG. A locus mark indicating a direction is drawn on the road map of the display device 8. It should be noted that in the trajectory mark as well, the point that the tip end direction along the road represents the traveling direction of the vehicle is the same as the above-described display of the current position Pn.

The calculation of the traveled distance mi and the display of the trajectory mark, etc. will be described based on steps S6 to S12 of FIG. 4 with reference to FIGS. 3 and 5. In step S6, the travel distance mi is calculated from the difference between the latitude data and longitude data of the departure point Ps or the passing point T that has passed immediately before as the starting point for calculating the travel distance and the latitude data yi and the longitude data xi of the current position Pn. Then, the CPU 12 functions as a distance calculating means. Here, the starting point Ps is used as the starting point only from the starting point Ps until the vehicle travels the minimum scale length of 100 m.
After running the minimum scale length of 100 m or more from s to generate the passing point data, the running distance mi is calculated with the passing point T that has passed just before as the starting point.

In step S8 following step S6, it is determined whether or not the traveling distance mi has become equal to or longer than the minimum scale length of 100 m. Here, the scale length is generally 1/5 to 1/10 of the display screen width of the display device 8 when a road map is displayed on the display device 8 based on the map data stored in the external storage device 6. The distance on the road map corresponding to the length is set for each road map having a different scale, and is stored in the external storage device 6 as scale length data corresponding to the map data. Then, when the road map is displayed on the display device 8, as shown in FIG. 3, the scale length corresponding to the road map is also displayed on the lower right part of the display screen of the display device 8.

If the vehicle has not traveled for a minimum scale length of 100 m or more from the starting point, a negative determination is made in step S8,
By repeating the above-mentioned steps S2 to S6,
The current position Pn and the traveling direction that move as the vehicle travels are displayed on the road map of the display device 8 as a large triangle.

If the vehicle travels from the starting point to a minimum scale length of 100 m or more, an affirmative decision is made in step S8, and step S1
At 0, the latitude data yi, longitude data xi, and azimuth data θi of the current position of the vehicle are stored in the backup RAM in the RAM 16 as the passage point data at the passage point T. Step S10 is executed only when the traveling distance mi is equal to or greater than the scale length of the most detailed road map in the map data stored in the external storage device 6 (when an affirmative judgment is made in step S8). The point data is generated every time the vehicle travels a distance corresponding to the minimum scale length and is stored in the backup RAM.
By executing 0 and S8, the CPU 12 functions as a passage point detection unit.

After step S10, the process proceeds to step S12 and, out of all the passing point data stored in the backup RAM, the travel distance interval corresponding to the scale length of 500 m of the road map currently displayed on the display device 8. Only the passing point data for each is read out, the above-mentioned trajectory mark is drawn on the road map of the display device 8 based on the read out passing point data, the execution of this step S12 and the above-mentioned current position of the vehicle are displayed. Step S2 for
By executing S4, the CPU 12 functions as a display control unit. Therefore, as shown in the middle part of FIG.
The adjacent intervals of the triangles drawn at the points T1 to T3 are
It is almost equal to the scale length of 500 m displayed at the lower right of the road map screen. After step S12, the process returns to step S2 and the above-described processing is repeated.

In the traveling locus display processing described in detail above, the distance between the departure point Ps and 100 meters or more is
The travel distance mi is calculated from the difference between the latitude data and the longitude data of the departure point Ps and the latitude data yi and the longitude data xi of the current position Pn of the vehicle, and steps S2 to S2 are performed until the travel distance mi becomes 100 m or more. S8 is repeatedly executed to display the current position Pn of the vehicle on the road map of the display device 8.

The mileage mi is the minimum scale length 10
When it becomes 0 m or more, steps S10 and S12 are executed to generate passage point data regarding the first passage point T1 and store it in the backup RAM. At this time, since the scale length of the road map displayed on the display device 8 is 500 m, the trajectory mark based on the first passing point data stored in the backup RAM is not drawn.

As described above, according to the traveling of the vehicle, the current position Pn is displayed by executing steps S2 to S8 in each calculation cycle of this process, and step S10 is performed every time the traveling distance of the vehicle becomes 100 m or more from the starting point. Generation of passing point data regarding each passing point T1 to T5 by execution of S12 and storage in the backup RAM are repeated, and thereafter, when the vehicle travels 500 m or more from the starting point Ps,
By executing step S10, the passing point data regarding the fifth passing point T5 is stored in the backup RAM. In the following step S12, the scale length of the road map displayed on the display device 8 is equal to 500 m and the traveling distance from the departure point Ps to the passing point T5. Therefore, the display device 8 is based on the passing point data of the passing point T5. A locus mark is drawn at a position corresponding to the passing point T5 on the road map displayed in (see the middle part of FIG. 3). Therefore, each time the traveling distance of the vehicle becomes an integral multiple of the scale length of 500 m of the road map or more, by executing steps S10 and S12, the passing points T5, T10, T15, ...
The locus marks are drawn at the positions on the road map of the display device 8 respectively corresponding to.

In this embodiment, the positions of the respective passing points T1, T2, T3, T4, T5 ... At the minimum scale lengths of 100 m in steps S8 and S10 and the traveling direction of the vehicle there. The passing point data concerning the road map is stored in the backup RAM one after another, and among the passing point data thus stored, the passing point T5 having the scale length of 500 m of the road map currently displayed on the display device 8 is passed. , T10, T15, ... Since the trajectory mark is drawn on the road map of the display device 8 based only on the passage point data, the display device 8 is displayed as shown in the middle part of FIG.
Each passing point T5, T10, T drawn on the road map of
The distance between the locus marks at each position of 15 ... Is approximately equal to the scale length of 500 m. Therefore, the traveling distance can be visually grasped from the number of locus marks, and the driver can drive without feeling anxiety. Can continue to do.

Further, as shown in FIG. 5, each passing point data also includes data representing the traveling direction of the vehicle at each passing point, and therefore, in step S12, on the road map of the display device 8 based on the passing point data. As shown in the middle part of FIG. 3, the locus marks drawn on the
The shape is such that the traveling direction of the vehicle at T15 ... Can be easily visually recognized. Therefore, for some reason, the positioning accuracy of the GPS receiver 2 deteriorates and a large triangle representing the current position Pn moves in a direction opposite to the actual traveling direction of the vehicle on the road map of the display device 8. Further, even if the triangle representing the current position Pn disappears on the screen of the display device 8 because the signal from the satellite cannot be received, the traveling direction of the vehicle is visually grasped based on only the trajectory mark at each passage point. Therefore, according to the road map displayed on the display device 8, it is possible to reach the destination without getting lost.

Further, in the present embodiment, since each passing point data is stored in the backup RAM, when returning from the destination O to the departure point Ps after the destination O is reached and the business is completed, the above-mentioned data is stored. Based on the passing point data stored in the backup RAM when the vehicle is traveling in the above way, the trajectory marks are reversely set to the respective passing points on the outgoing route on the road map displayed on the display device 8 as shown in the lower part of FIG. By drawing on, the return route can be guided. That is, when the vehicle is started to return from the destination O to the departure point Ps, the power of the device 1 is turned on again, the road map is displayed on the display device 8, and then the input device 4 is operated to operate the return route. If you make an input for guidance, CP
U12 backs up the passing point data for every 500 m scale length of the road map displayed on the display device R
The track mark is read from the AM and the trajectory mark is drawn in the reverse direction based on the read passing point data. That is, as is clear from a comparison between the middle stage and the lower stage of FIG. 3, the direction of the tip along the path of the trajectory mark on the return path (lower stage of FIG. 3) is referred to as the direction of the trajectory mark on the outward path (the middle stage of FIG. 3). Is drawn to show the opposite direction. Then, as the vehicle runs, reading and displaying of the current position similar to steps S2 and S4 of FIG. 4 are repeated, and the display device 8 changes from the destination O to the departure point P.
The vehicle is guided by displaying the current position Pn of the vehicle on the road map where the trajectory marks are displayed at intervals of 500 m in scale length up to s.

On such a return route, as in the case of the above-described forward route, the trajectory marks at each passing point are drawn at intervals of 500 m in scale length of the road map, and therefore, as shown in the lower part of FIG. Based on the display position of the current position Pn in, the traveling distance from the destination O to the current position Pn is about 700 m, and the current position Pn to the departure place Ps.
Since it is possible to visually understand that the distance to the vehicle is less than about 7 km, the driver does not feel anxiety even on the way home and is guided by the trajectory mark on the road map displayed by the display device 8. You can continue to drive.

Further, as in the case of the forward route, the trajectory marks at each passing point are drawn in a shape that makes it easy to recognize the traveling direction of the vehicle and are drawn in the opposite direction to the forward route, so that the signals from the satellites are transmitted to the satellite. Even if a large triangle representing the current position Pn is displayed at a position on the road map that does not correspond to the actual position of the actual vehicle because it cannot be received, the scale length is 500 m apart from the destination O to the departure point Ps. The direction of the tip along the road of the trajectory mark drawn with indicates the direction in which the vehicle should travel on the return path. Therefore, by following such a trajectory mark, the driver returns to the starting point Ps without getting lost. be able to.

Further, in the present embodiment, the passing point data stored in the backup RAM in step S10 is the detailed map scale length of 100 m in the map data stored in the external storage device 6 in step S8. Each time the vehicle travels, the travel locus is sampled, so even if the most detailed road map is displayed on the display device 8, at step S12, the minimum is calculated based on each passing point data. Trajectory marks can be drawn at scale length intervals of 100 m. Therefore, no matter which scale road map is displayed on the display device 8, trajectory marks can be drawn at scale length intervals. It is easy to visually recognize the distance traveled.

In this embodiment, the minimum scale length is 10
In order to generate and store the passing point data every 0 m, it is not only judged whether or not the traveling distance mi is equal to the minimum scale length 100 m, but the traveling distance mi is set to the minimum scale length 100 m in step S8. Since it is determined whether or not it is above, the mileage mi and the minimum scale length 1
Even if the signal from the satellite could not be received at the moment when 00m became equal, when the signal was received again after the signal could not be received, the passing point data is promptly generated and stored (step S10), It is possible to secure the passing point data of the mileage interval that is as close as possible to the minimum scale length of 100 m, and based on the passing point data, whichever scale map the road map is displayed on the display device 8, the scale is almost scaled. Trajectory marks can be drawn at long intervals.

In the present embodiment, the starting point Ps or the passing point T which has passed immediately before is used as the starting point of the calculation of the traveling distance mi executed in step S6. Instead, however, the present point read immediately before in step S2 is used. The position may be the starting point. That is, from the difference between the latitude data and the longitude data read in step S2 immediately before and the latitude data yi and the longitude data xi of the current position read in step S2, the traveling distance ms
Is calculated, and when the integrated value M of the travel distance ms becomes equal to or longer than the minimum scale length, steps S10 and S12 are executed, the integrated value M is cleared, and the travel distance ms is integrated again. good. Thus, the integrated value M of the traveled distance ms
By using the configuration, it is possible to more accurately calculate the mileage of the vehicle, the adjacency interval of each passing point data generated based on the mileage is made closer to the minimum scale length, and based on the passing point data. The distance between the drawn trajectory marks can be made closer to the scale length of the road map, and the travel distance and the like can be known more accurately from the trajectory marks.

The steps S2, S4, S of this embodiment are
By calculating the current position by adding the altitude data hi as the data indicating the altitude to the latitude data yi and the longitude data xi used in S6, S10, etc., it is possible to calculate the current position more accurately even in areas with severe undulations. Can be done in
Further, more accurate passing point data can be generated.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing the overall configuration of the vehicle navigation device 1 of the present embodiment.

FIG. 3 is an explanatory diagram illustrating display on a display screen of a display device 8 in three cases.

FIG. 4 is a flowchart showing a traveling locus display process executed by the CPU 12.

FIG. 5 is an explanatory diagram showing a part of passing point data stored in a backup RAM in RAM 16.

[Explanation of symbols]

2 ... GPS receiver, 4 ... Input device, 6
... external storage device, 8 ... display device, 10 ... control device, 12 ... CPU, 14 ... ROM,
16 ... RAM, 22 ... Display drive device,

Claims (1)

(57) [Claims] 1. A road map and a scale of the road map
Map data for displaying scale length has different scales
From a predetermined storage means that stores multiple types for each road map,
Load map data of any scale and use the map data as the basis.
Based on the road map and scale length, the current vehicle position is included.
A traveling locus display device for displaying together with a traveling locus, a position detecting means for detecting a current position of a vehicle, a direction detecting means for detecting a traveling direction of the vehicle, and a distance calculating means for calculating a traveling distance of the vehicle. The storage means based on the output from the distance calculation means
Driving distance corresponding to the minimum scale length of the stored road map
Detects the passing point of the vehicle at the separation distance and
Passing each passing point, the traveling direction of the vehicle at the position and vent over point of the passing point, calculated on the basis of the output from said position detecting means and said direction detection means, the result output the calculated and
Based on the passing point detection means stored as overpoint data and the map data stored in the storage means, the table
The road map of any scale and the scale of the road map are shown in the indicating means.
The length of the route is displayed and based on the passing point data.
The scale length of the road map on the displayed road map.
By the running distance interval corresponding to, and draw a mark representing the traveling direction of the vehicle at the position and the passing point of the passing point of the vehicle,併 was based on an output from said position detecting means Dzu
Travel locus display device characterized by comprising: a display control means for displaying the current position, the can the vehicle.