JP2673371B2 - Mode switching method for vehicle navigation device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mode switching method of a vehicular navigation device that displays a current position of a vehicle on a road map projected on a screen while obtaining the current position of the vehicle.

2. Description of the Related Art Recently, for example, when driving a vehicle such as an automobile in a non-guidance area, in order to provide appropriate guidance so that the driver does not get lost from the planned traveling course,
As the vehicle travels, the distance sensor and the direction sensor are used to detect the traveling distance and the traveling direction of the vehicle, respectively, and the current position of the vehicle on the two-dimensional coordinates is obtained by cumulative calculation, and the vehicle travels. For vehicles that enable the driver to confirm the current position by displaying the current position, which changes moment by moment, on the road map that is displayed on the screen in advance while sequentially updating it with point information. Navigation devices have been developed.

Conventionally, in this type of vehicle navigation device, when the current position of the vehicle deviates from the road on the map due to accumulated error in calculating the current position due to accuracy of each sensor or calculation accuracy, deformation of road map, etc. In addition, the current position can be manually moved to correct the position.

In addition, in order to more optimally guide the driving of the vehicle, set the destination on the road map displayed on the screen and display the mark of the destination, or search for the road map displayed on the screen. I am trying to make it possible.

In order to perform the operations such as the correction of the current position, the setting of the destination or the search of the road map, the vehicle navigation device is selectively operated in the current position display mode and the operation execution mode. It has become necessary to be able to switch to.

In the past, however, the mode change can be performed at any time by a switch operation.However, a switch operation for changing the mode while the vehicle is traveling and various key operations for executing an operation in the operation mode are performed. Performing it is complicated and not preferable.

Therefore, when the vehicle is running, the switch operation for mode switching and the operation mode during operation mode can be performed so that the current position can be corrected, the destination can be set or the road map can be searched only when the vehicle is stopped. It is conceivable to freeze all the operations in the mode immediately before running the vehicle in order to prohibit various key operations for executing the operation, but when the mode immediately before running is switched to the operation mode, The display of the current position will be interrupted during driving.

In addition, it is conceivable to forcibly switch to the current position display mode when the vehicle is traveling, but in that case, the operation up to the middle of the time just before traveling becomes useless.

The present invention has been made in consideration of the above points, and it is possible to switch to an operation mode capable of performing operations such as correction of the current position, setting of a destination, and search of a road map only when the vehicle is stopped. When you enable it and forcibly switch to the current position display mode when the vehicle starts running,
When the vehicle starts running during the operation, it automatically returns to the operation mode when the stopped state of the vehicle is detected in the forcibly switched current position display mode to improve the operability. The present invention provides a mode switching method for a vehicle navigation device.

Specifically, it detects the current position of the vehicle and displays the current position display mode on the screen together with the map data read from the map information storage medium, as well as the correction of the current position, map search, or input of the destination. In a mode switching method of a vehicle navigation device that has an operation mode to be performed and switches the current position display mode and the operation mode according to a predetermined condition, when the driver selects the operation mode, the operation mode is moved to the operation mode. However, when the traveling of the vehicle is detected before the completion of the predetermined operation in the operation mode, the state in the operation mode up to that time is stored, the current position display mode is entered, and the predetermined operation in the operation mode is performed. When the stop of the vehicle is detected while the vehicle is running before the completion of the above operation, the stored operation mode state is read out and the operation mode is restored.

Configuration Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a basic configuration of a vehicle navigation device for carrying out the present invention. A distance sensor 1 that outputs a pulse signal for each unit traveled distance according to the rotation of a tire of a vehicle, and a yaw direction. The direction sensor 2 of a rate type that detects the angular velocity of the change and outputs a signal proportional to the amount of change in the direction accompanying the running of the vehicle, and the number of pulse signals from the distance sensor 1 are counted to measure the running distance of the vehicle. At the same time, the first arithmetic processing unit (microcomputer) for accumulatively obtaining the current position on the XY coordinates for each constant traveling distance of the vehicle by calculating the traveling direction according to the output signal of the direction sensor 2 ) 3
And a travel locus storage device 4 that sequentially stores data of the current position that changes momentarily as the vehicle travels, and stores and stores it as finite continuous position information of the vehicle, and a map that stores road map data in advance. An information storage medium 5, a storage medium reproducing device 6 for selectively reading map data from the storage medium 5, and a current position of the vehicle on a screen on which a predetermined road map is projected based on the read map data. Is displayed on the display device 7 and the display device 7 that displays the traveling locus and the traveling direction of the vehicle at the current position, and the like, the display control device (MMI) 8 that controls the display on the display device 7, and the like. Move the map displayed on the screen by setting the road map and selectively giving display commands such as the traveling locus and the traveling direction of the vehicle at the current position. And the operating device 9 capable of appropriately changing the display form such as rotation of the traveling locus and selection of the display scale ratio, and the vehicle based on the traveling locus data and the road map data displayed on the screen. Is calculated by the first arithmetic processing unit so that the current position of the vehicle is displayed on the matched road by performing matching processing of each pattern of the traveling locus of the vehicle and the road on the map. And a second arithmetic processing unit (microcomputer) 10 for correcting position data.

The display control device 8 displays the road map and the current position of the vehicle on the screen of the display device 7 based on the data of the road map for display and the data of the current position, and the operation command input from the operation device 9. The display form of the screen is appropriately changed according to.

In such a vehicle navigation device, a predetermined road map is displayed on the screen of the display device 7, and is preset by the first arithmetic processing device 3 according to the traveling of the vehicle from the starting point on the map. The current position on the XY coordinates is calculated by calculation according to the scale of the map.

The data of the obtained current position is delivered to the second arithmetic processing unit 10 and then sequentially sent to and stored in the traveling locus storage device 4, and is updated and retained as a series of traveling locus data.

Then, in the second arithmetic processing unit 10, the matching process of each pattern of the traveling locus of the vehicle and the road on the map is executed for each constant traveling distance of the vehicle, and the current position on the matched road is obtained. Then, the traveling locus and the current position of the vehicle are corrected so that the traveling locus comes.

The corrected data of the current position is given to the display control device 8 together with the data of the direction currently detected, and under the control, it is displayed on the screen of the display device 7, for example, as shown in FIG. A display mark M1 indicating the current position of the vehicle and a display mark M2 indicating the traveling direction of the vehicle at the current position on the road map, and a display mark M3 of the traveling locus of the vehicle when a traveling locus display command is issued. It is displayed in a simulated manner, following the running condition.

At that time, the display mark M1 of the current position of the vehicle is always in the center of the screen in the current position display mode, and as the vehicle travels, the road map scrolls appropriately according to the traveling direction, The current position of the vehicle will be displayed above.

Here, in the vehicle navigation device configured as described above, operation means capable of performing operations such as correction of the current position on the road map, setting of a destination on the road map, and search of the road map. And means for detecting respective states of stop and running of the vehicle, and mode switching capable of switching from the current position display mode to an operation mode for executing the operation when the stopped state of the vehicle is detected. Means and means for forcibly switching to the current position display mode when the running state of the vehicle is detected in the operation mode, and means for detecting the vehicle stop state during the forcibly switched current position display mode It is characterized in that means for automatically returning to the operation mode is provided.

As described above, the traveling locus and the current position of the vehicle are corrected by the matching process in the second arithmetic processing device 10. However, since the correction is performed for each constant traveling distance of the vehicle, the current position is corrected. A separate operating means is provided so that the traveling locus and the current position of the vehicle can be manually corrected as required before the traveling of the vehicle reaches the certain traveling distance.

Operation means capable of performing operations such as correction of the current position on the road map, setting of destinations on the road map, and search of the road map are actually executed by input operations on the operation device 9.

Further, the means for detecting each of the stopped and running states of the vehicle is
Actually, the display control device 8 reads the presence / absence of the pulse signal from the distance sensor 1, and when the pulse signal is output from the distance sensor 1, the vehicle is in a running state and the distance sensor 1 outputs the pulse signal. When not, it detects that the vehicle is stopped.

Further, the mode switching means capable of switching from the current position display mode to the operation mode for executing the operation when the stop state of the vehicle is detected is actually the operation mode from the operation device 9. It is executed under the control of the display control device 8 in response to an input command for switching to.

Also, a means for forcibly switching to the current position display mode when the running state of the vehicle is detected in the operation mode, and an operation mode when the vehicle stop state is detected in the forcibly switched current position display mode. The means for automatically returning to 1) are actually executed under the control of the display control device 8.

FIG. 3 shows an example of the installation state of various operation keys in the operation device 9.

In the figure, K1 is a screen display ON / OFF key, K2 is a map scale selection key group, K3 is a destination mode ON / OFF key, K4 is a destination set key, K5 is a destination clear (erase) key, K6 is a position correction key, K7 is a track deletion key, K8 is a map search key, and K9 is a current position return key for returning to the current position display mode in the operation mode.

In order to prevent erroneous operation, the key parts of K3 to K9
A cover 11 is provided, and the cover 11 is opened and operated when operating the respective keys.

Further, in the figure, ST is a stick that can scroll the road map displayed on the screen 12 in the up, down, left, right and diagonal directions, and RK and LK are the running trajectory and the traveling path of the vehicle displayed on the screen 13. A rotation key that rotates each mark in the direction to the right or left.

When the current position is corrected, the above-mentioned means are specifically executed as follows.

Now, as shown in FIG. 4 (a), when in the current position display mode, the current position mark M1 of the vehicle and the running track mark M3 are displayed off the road on the map, FIG. As shown in (b), when the position correction key K6 is pressed (at this time, the LED provided on the key K6 as an indicator lights up), the mode is switched to the position correction mode and the "position correction mode" is displayed at the end of the screen. The characters are displayed, and the current position mark M1 and the direction mark
M2 changes from white until then to red.

Then, by entering the position correction mode, it becomes possible to scroll the road map displayed on the screen by operating the stick ST and rotate the marks M2, M3 in the traveling path and traveling direction by operating the rotary keys RK, LK. ,
As shown in FIG. 4 (c), the stick ST is operated to adjust the current position, and the rotary keys RK and LK are adjusted to adjust the traveling locus and the traveling direction. Correct the position so that the travel path matches the road map.

Next, when the current position return key K9 is pressed (at this time, the LED of the position correction key K6 is turned off), the position correction is set and the current position display mode is restored, as shown in FIG. 4 (d). As described above, the current position mark M1, the traveling direction mark M2, and the traveling locus mark M3 of the vehicle are displayed in white on the road map in a state where the position is corrected, and then updated and displayed as the vehicle travels. .

Such a series of position correction operations are prohibited while the vehicle is traveling, and will be performed while the vehicle is stopped, such as waiting for a signal, but the operation may not be completed before the vehicle starts running.

In such a case, as shown in FIG. 4 (b), when traveling of the vehicle is detected while the position correcting operation is being performed while the position correcting operation is being performed,
After being forcibly set once at the position in the middle of the operation, it is switched to the current position display mode, and the current position display is restarted from the position in the middle of the correction as shown in FIG. 4 (e). .

In this case, the characters "position correction mode" are displayed on the edge of the screen, and the mark M1 at the current position and the mark M2 at the traveling direction remain red, indicating that position correction is in progress. (At this time, position correction key K6 LE
D remains lit).

Further, the fact that the position is being corrected is stored in the internal memory of the display control device 8.

Then, when the vehicle stop state is detected in the current position display mode forcibly switched by the detection of the running state of the vehicle, the original position correction mode is automatically restored, and the position correction operation is performed. You will be able to continue.

At that time, the position correction mode is automatically restored in the state where the current position display is updated while the position correction is suspended.

As described above, according to the present invention, the position correction operation can be performed only when the vehicle is stopped, and when the vehicle starts running during the position correction, the position correction mode is forcibly switched to the current position display mode. The position correction operation up to that point becomes effective, and the position correction operation can be efficiently performed when the vehicle is stopped without interrupting the current position display accompanying the traveling of the vehicle.

Further, according to the present invention, when the vehicle is stopped, the destination key
Even if the K3 or map search key K8 is pressed to switch to the destination setting mode or the map search mode, the vehicle traveling is detected before the destination is set or the map search is completed. And the current position display mode are forcibly switched, but it is remembered that the operation is in progress, and when the vehicle is stopped after that, it automatically returns to the previous destination mode or map search mode, We are making it possible to continue to perform ground set or map searches.

In the destination setting mode, the cursor is displayed in the center of the screen, and by pressing the destination set key K4 when the destination on the map comes to the cursor position while scrolling the road map by operating the stick ST A destination is set, a mark of the destination is displayed at the set position, and a line connecting the current position and the destination is displayed.

Further, also in the map search mode, a cursor is displayed in the center of the screen, and for example, by operating the stick ST, the road map can be scrolled in the direction of the line and the state of the road heading to the destination can be seen.

When the vehicle starts running and is forcibly switched to the current position display mode in the destination setting mode or the map search mode, the state of the road map displayed on the screen at that time is stored and the detection of the stopped state of the vehicle thereafter is detected. At the time of automatically returning to the destination mode or the map search mode, it may be possible to restore the screen immediately before the forced switching to the current position display mode according to the state of the road map previously stored. It is possible.

As described above, in the mode switching method for the vehicular navigation device according to the present invention, the operation mode is changed so that the current position can be corrected, the destination can be set, and the road map can be searched only when the vehicle is stopped. Is enabled, and when the vehicle starts running in that operation mode, the current position display mode is forcibly switched, and the stopped state of the vehicle is detected in the forcibly switched current position display mode. At this time, it automatically returns to the operation mode, so that you can correct the current position, set the destination, search the map, etc. without affecting the original operation of displaying the current position when the vehicle is running. It has an excellent advantage that it can be performed with good operability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a vehicle navigation device for carrying out the present invention, FIG. 2 is a diagram showing an example of a display screen in the configuration example, and FIG. 3 is a front view of the vehicle navigation device. 4 (a) to 4 (e) are diagrams showing an example of a state in which the display screen is switched in accordance with the procedure for correcting the current position. 1 ... Distance sensor, 2 ... Direction sensor, 3 ... First arithmetic processing unit, 4 ... Running trajectory storage device, 5 ... Map information storage medium, 6 ... Storage medium reproducing device, 7 ... Display apparatus,
8 ... Display control device, 9 ... Operating device, 10 ... Second processing unit, M1 ... Current position display mark, M2 ... Travel direction display mark, M3 ... Traveling locus display mark

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-199099 (JP, A) JP-A-61-180400 (JP, A) Actually developed JP-A-56-175249 (JP, U)

Claims (2)

(57) [Claims] 1. A current position display mode for detecting a current position of a vehicle and displaying it on a screen together with map data read from a map information storage medium, correcting the current position, searching a map,
Or a mode switching method for a vehicle navigation device that has an operation mode for inputting a destination, and switches the current position display mode and the operation mode according to a predetermined condition, when the driver selects the operation mode. , Moving to the operation mode, when traveling of the vehicle is detected before completion of a predetermined operation in the operation mode, stores the state in the operation mode until then, shifts to the current position display mode, When a stop of the vehicle is detected during traveling before completion of a predetermined operation in the operation mode, the stored operation mode state is read to return to the operation mode. Mode switching method. 2. When the running state of the vehicle is detected during the operation for correcting the current position, the current position is forcibly set to the position during the correction and the current position is forcibly switched by the detection of the running state of the vehicle. The mode switching method for a vehicular navigation device according to the above-mentioned item 1, wherein the current position is continuously displayed from the set position in the display mode.