JPH0658233B2 - Vehicle running guidance device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device that guides a vehicle by displaying the traveling position obtained by the process of integrating the traveling direction and the distance of the vehicle on a map.

<Background of the Invention> In this type of device disclosed in Japanese Patent Application No. 56-59281, the relative position of the vehicle with respect to the reference position is determined by the process of integrating the vehicle traveling direction and the distance. The error is accumulated at the calculated position.

Therefore, if a large number of absolute positions are prepared in advance in a memory or the like and the display of the calculated position does not match the map display, the absolute position is displayed on the map together with the calculated position.

When the display of the calculated position approaches any of the absolute positions, the switch operation is performed, whereby the calculated position is corrected to the absolute position.

However, in the past, since the calculated position was corrected to the absolute position closest to it, the switch operation for position correction is performed when the calculated position is greatly separated from the absolute position, which is the normal position for correction, due to error accumulation. When you get
Although the calculated position at that time is the closest to this, there is a problem that the calculated position is erroneously corrected to another absolute position far away from the actual position of the vehicle.

<Purpose of the Invention> The present invention has been made in view of the above conventional problems,
It is an object of the present invention to provide a vehicle travel guide device capable of reliably correcting a calculated position to an absolute position that is a correction normal position.

<< Structure of the Invention >> In order to achieve the above object, the apparatus according to the present invention is structured as shown in FIG.

In the figure, the traveling position calculation means a obtains the relative traveling position of the vehicle with respect to the reference position by integrating the traveling direction and distance of the vehicle, and the traveling position display means b calculates the map based on the map data of the map data storage means c. The calculation position is displayed above.

Then, a large number of absolute positions are stored in the absolute position storage means d, and when a candidate search command is given by the switch operation in the candidate search means e, a plurality of absolute positions are searched as candidate positions from the vicinity of the calculated position. .

Further, the candidate position display command means f displays the candidate positions.
Is instructed to the traveling position display means b, so that the traveling position display means b also displays the candidate position.

Further, the position selecting means g selects one of the candidate positions as the traveling position of the vehicle in accordance with the switch operation, and the calculated position correcting means h corrects the calculated position to this selected position.

<< Embodiment of the Invention >> Hereinafter, a preferred embodiment of an apparatus according to the present invention will be described with reference to the drawings.

In FIG. 2, the distance sensor 10 obtains a distance pulse every time the vehicle travels a predetermined distance.
In 2, the running direction of the vehicle is detected using the geomagnetism.

The detection signals of the distance sensor 10 and the azimuth sensor 12 are given to the sensor interface 14, and the CPU 16 obtains the relative current traveling position (calculated position) of the vehicle with respect to the reference position by an integration process using these detection signals. Has been.

Further, map data is stored in an external memory 18 composed of a compact disc, a ROM card, etc.
At RT20, the current traveling position of the vehicle obtained by the CPU 16 is displayed on the map based on the map data.

The video RAM 22 is used for display control of the CRT 20, and the processing of the CPU 16 is performed by the system ROM 24.
The RAM 26 is used in accordance with the stored contents of.

The transparent operation panel 2 provided on the front surface of the CRT 20
The operation signal 8 is given to the CPU 16 via the operation panel interface 30, and the departure place of the vehicle is given as the reference position of the current traveling position obtained by the CPU 16 by the operation of the operation panel 28.

Here, in the input operation section 32, the correction switch 34, the set switch 36, the selection switches 38, 4 shown in FIG.
0 is provided, and the current traveling position obtained by the CPU 16 is corrected by these operations.

The contents stored in the external memory 18 are used for the correction, and FIG. 4 explains the data used for the correction.

In FIG. 4, a block number is attached to each divided area of the map 42, and an intersection number is attached to each registered intersection in each area.

And the position is X coordinate, corresponding to those registered intersections.
It is given in the Y coordinate and its name is also given.

Further, an intersection number is attached to an intersection next to the intersection, and a road number is attached to a road leading to the adjacent intersection.

FIG. 5 shows a general flow showing a schematic processing procedure of the CPU 16. In the processing, the starting point identification processing is first performed (step 100). The processing is shown in FIG. 6, FIG. 7, and FIG. , FIG. 9 and FIG. 10, the operation is performed according to the operation of the operation panel 28, whereby the starting position of the vehicle is specified.

When the departure position of the vehicle is specified, the current traveling position of the vehicle is calculated based on the departure position (step 1
02), the current traveling position is obtained by the process of integrating the traveling direction and the distance of the vehicle as shown in FIG.

Further, the current traveling position and traveling locus of the vehicle are CRT20.
Is displayed on the map (step 104), and the above processing is repeated until the correction switch 34 shown in FIG. 3 is turned on.

After that, when an error accumulates in the current traveling position of the vehicle obtained by the CPU 16 due to the disturbance of the earth's magnetism or when the vehicle is worn, etc., and when the display position and the display map differ, the correction switch 34 is turned on. (Affirmative determination in step 106), correction processing shown in FIG. 12 (step 108)
Is started.

In the process shown in FIG. 12, a predetermined number (= n) of registered intersections are searched in the order closer to the current traveling position obtained by the CPU 16 (step 110), and the X coordinate and Y coordinate data of each registered intersection is searched (step 110). (See FIG. 4) is used.

Then, when the map is moved so that the searched registered intersections are displayed most on the CRT 20 (step 11).
2) Then, numbers are given to the respective search intersections in order from the current traveling position (step 114).

Further, when the pointer value i is set to the value 1 (step 11
6), the mark is blinked at the registered intersection position of the number indicated by the value i as shown in FIG. 13 (A).

At that time, the selection switch 38 is operated without pressing the set switch 36 (negative determination in step 120).
If 40 or 40 is pressed (the positive determination in step 122 or the positive determination in step 124), the pointer value i is incremented (steps 126 and 12).
8, 130) or its decrement (step 132,
134, 136) is performed, and the mark is displayed in a blinking manner as shown in FIG. 13B at the search intersection position of the number corresponding to the value i.

After that, when the switch 38 is pushed, the numbers 3, 4, ... 2,
Marks are cyclically displayed at the positions of the search intersections in the order of 1 and n, and when the mark of the intersection closest to the actual vehicle position and the vehicle next arrives is displayed, those operations are stopped.

Then, when it is determined from the circumstances around the vehicle that the blinking search intersection mark matches the actual vehicle position, the set switch 36 is pressed.

When the switch operation is confirmed (step 12)
If the answer is 0, the data of the X coordinate and the Y coordinate of this registered intersection (see FIG. 4) are read, and the current traveling position of the vehicle is corrected to the absolute position indicated by them (step 138).

As a result, after that, the relative current traveling position of the vehicle is obtained in the process of FIG. 11 with the position of the registered intersection as a reference, and therefore the corrected intersection is started at the CRT 20 as shown in FIG. 13 (C). The traveling path of the vehicle is displayed as.

As described above, according to this embodiment, the correction switch 3
When 4 is pressed, a plurality of registered intersection positions are cyclically displayed on the map in order from the current running position of the vehicle, and any one of them is set as the normal correction position of the current running position of the vehicle by the set switch 36. Since the selection is made by pressing, the current traveling position of the vehicle can be corrected to the normal position intended by the occupant, and thus the current traveling position of the vehicle can be corrected accurately and without error.

Further, according to the present embodiment, the largest number of search intersections are displayed on one screen, so that the selection range of registered intersections that are the normal correction positions can be expanded.

Further, according to the present embodiment, since the search intersections are displayed in the order closer to the current traveling position of the vehicle, the current traveling position of the vehicle can be corrected quickly.

Further, according to the present embodiment, since each search intersection is cyclically displayed by operating the selection switches 38 and 40, the correction operation of the current traveling position of the vehicle is facilitated.

The position correction process of FIG. 12 can be modified as shown in FIG.

In FIG. 14, the process of FIG. 11 is interrupted first (step 140), and the position is corrected (step 138).
When is finished, the processing of FIG. 11 is restarted (step 142).

In this way, it is possible to omit the departure point identifying process (step 100 in FIG. 5) in which it is difficult to accurately input the departure point, select a nearby corrected intersection in advance, and set it when the vehicle reaches that position. By pressing the switch 36, the departure place can be accurately input.

Further, the position correction processing of FIG. 14 can be modified as shown in FIG.

The candidate intersection search process of FIG. 15 (step 14
In 4), the candidate intersections are searched from the map currently being displayed, and the process of moving the map so that the most searched intersections are displayed (step 102) is not performed.

Therefore, it is possible to prevent the operator from feeling uncomfortable due to the movement of the map, and it is possible to reduce the data processing amount of the CPU 16 and effectively use the data.

<< Advantages of the Invention >> As described above, according to the present invention, when a candidate search command is given by a switch operation, a plurality of vehicles are selected from the vicinity of the current traveling position of the vehicle obtained by the process of integrating the traveling direction and distance of the vehicle. The absolute position is searched for and displayed, and one of the candidate positions is selected as the normal correction position for the current running position of the vehicle according to the switch operation, and the current running position of the vehicle is corrected to that position. The correction can be performed accurately.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to claims, FIG. 2 is a block diagram showing a system to which the present invention is applied, FIG. 3 is an explanatory view of a switch operation surface used for position correction, and FIG. 4 is an external memory in FIG. FIG. 5 is a diagram for explaining the stored contents of FIG.
General flow chart of PU, FIG. 6, FIG. 7, and FIG.
Fig. 9, Fig. 9 and Fig. 10 are explanatory diagrams of the specific action of the departure place,
FIG. 1 is a flowchart showing the calculation processing of the current traveling position,
FIG. 12 is a flowchart showing the procedure of position correction processing,
Explanatory drawing of the position correction action by the processing of FIG. 13, FIG.
FIG. 15 and FIG. 15 are flowcharts showing the procedure of the position correction process. 10 ... Distance sensor 12 ... Direction sensor 16 ... CPU 18 ... External memory 20 ... CRT 22 ... Video RAM 24 ... System ROM 26 ... RAM 28 ... Operation panel 32 ... Input operation part 34 ... Correction switch 36 ... Set switch 38, 40 ... Selection switch

Claims (1)

[Claims] 1. A traveling position calculation means for obtaining a relative traveling position of a vehicle with respect to a reference position by integrating the detected traveling direction and distance of a vehicle, a map data storage means for storing map data, and a map data storage means. When the candidate search command is given by switch operation, the traveling position display means for displaying the calculated position on the obtained map, the absolute position storage means for storing a large number of absolute positions,
Candidate search means for searching a plurality of absolute positions as candidate positions from the vicinity of the calculated position, candidate position display command means for instructing the traveling position display means to display the candidate positions, and any of the candidate positions of the vehicle according to the switch operation. A travel guide device for a vehicle, comprising: a position selection means for selecting a travel position, and a calculation position correction means for correcting the calculation position to the selected position.