JPS58223709A - Guiding device of travelling course - Google Patents

Abstract

PURPOSE:To perform appropriate course guidance with relatively simple constitution by displaying a current position and a current travelling azimuth based upon a destination, and displaying the map of a desired area. CONSTITUTION:A sensor 5 inputs the angle of a travelling direction to the north to an X component arithmetic part 7, and a speed sensor 6 inputs a pulse of every unit travelling distance to an Y component arithmetic part 8; the components of the current position on the X and Y axes are sent to a current position memory 9 successively to store the up-to-date current position state. A comparison part 11 compares the current position information in the memory 9 with position information on the destination stored in a reference position memory; and the current position and travelling direction are displayed on a display 15 through a mode switching support part 12 by an input from a keyboard 13 and when the current position enters a distance range of 1km of the destination, the map of the circumference of the destination is displayed at a map display part 16 by switching. Thus, the appropriate course guidance is carried out with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a driving course guiding device, for example, a device which can determine the current position and running direction of a moving object such as a car based on the outputs of a direction sensor and a speed sensor mounted on the moving object. A travel information display section that displays a predetermined reference point as a reference and a map display section that displays a map of a desired area using a map projection means are separately provided, and the above-mentioned information is provided in correspondence with the distance reached from the reference point. The present invention relates to a driving course guidance device that automatically switches between a driving information display section and a map display section.

Prior to filing the present application, the applicants of the present application developed a running course guiding device as shown in FIG. The travel course guidance device is placed, for example, in front of the driver's seat, and as shown in FIG.
A CRT display 1t is provided, and is configured to plot on the display screen a travel trajectory 2 obtained based on outputs from a separately mounted direction sensor (not shown) and speed sensor (not shown). On the other hand, for example, a map sheet 3 drawn on a transparent film is configured to be attachable to and detachable from the front of the display screen, and the attached map sheet 3 is fixed by a map fixing means 4,
The travel trajectory 2 is extended along a desired road on the map.

The driving course guidance device described above has one major feature and advantage in that it superimposes a display screen and a map and extends the driving trajectory along the road on the map. This is a promising direction for course guidance devices.

However, in the driving course guidance device described above, the information processing for displaying the map on the display and displaying the driving trajectory in correspondence with the roads on the map is complex and requires a large amount of information processing. Production costs have skyrocketed, making it difficult to obtain them at affordable prices. Therefore, consumers strongly desire a travel course guidance device that is simple and inexpensive to obtain, even if it is not a high-class device as described above, as long as it has a substantial course guidance effect.

The present invention aims to meet the above-mentioned demands of consumers, and includes, for example, a travel information display unit that displays the current position and direction based on a predetermined reference point such as a destination, and a map of the desired area. When the user reaches a predetermined distance from the reference point, the map display section displays information about the surroundings of the reference point based on the travel information displayed on the travel information display section up to that point. It is an object of the present invention to provide a simple and inexpensive travel course guidance device that performs accurate course guidance by switching to a detailed map display. This will be explained below with reference to the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention;
The figure is an explanatory diagram regarding the current position information in the illustrated embodiment in FIG. 2, and #! FIG. 4 is an explanatory diagram for explaining the principle of displaying the current position in the present invention, FIG. 5 is a front view of an embodiment of the display section in the present invention, and FIG. 6 is an explanation of an embodiment of the driving mode display mode in the present invention. 7A and 7B show explanatory diagrams regarding the scale sheet used in the present invention.

In Fig. 2, numeral 5 is a direction sensor, and 6 is a speed sensor.
sensor, 7 is an X component calculation section, 8 is a y1 minute calculation section, 9 is a current position memory, 1o is a reference position memory, 11 is a comparison section,
12 is a mode switching instruction section, 13 is a keyboard, and 14 is a C
PU, 15 is a display, and 16 is a map display section.

The direction sensor 5 detects the traveling direction of the moving object relative to a predetermined reference direction, for example, the azimuth "north", and outputs angle information of the traveling direction with respect to the azimuth "north".

The speed sensor 6 outputs, for example, a clock pulse corresponding to the rotation of the wheel, that is, a clock pulse every time the vehicle travels a predetermined unit distance.

Next, the operations of the X component calculation section 7 and the X component calculation section 8 will be explained with reference to FIG. Reference numeral 17 in the figure is a driving course, and represents the driving route from the starting point ps to the current position pn. Moreover, the points P0, P3, Pl, . . . on the driving course 17 are the first, second, and This corresponds to the third, . . . clock pulse. Therefore, based on the angle information output from the direction sensor 5, the changes x0, xl, X2, . . . on the X axis of the points Po, P2, . ... is calculated in the X component calculation unit 7, and the change on the Y axis is y0.3'l113'!
, . . . are calculated in the X component calculation unit 8.

Then, the X-component calculation section 7 and the X-component calculation section 8 output the X-component change and the cumulative value of the X-component change. That is, for example, when the current position pn is reached, the X component calculation unit 7 outputs (:I:.+X,+...+"
n −t ), that is,)(n is outputted, and the X component calculation unit 8 outputs ('10''/I+...+yn-+), that is, '(n).

In the current position memory 9, the outputs of the X-component calculating section 7 and the X-component calculating section 8 are sequentially updated and stored. Therefore, the latest current position information is stored in the current position device memory 9.

The reference position memory 10 is stored from the keyboard 13 to the CPU 1
4, the position information of a predetermined reference point input via 4 is stored. For example, if a destination is selected as the reference point, the X component and the X component from the starting point to the destination are determined from, for example, a map and stored in the reference position memory 10 before the start of travel. To explain specifically with reference to FIG. 4, the point ps on the map shown in FIG.
When p is the starting point and point Pe is the destination, the reference position information stored in the reference position memory 10 is the starting point p.
The coordinate value of the destination pe with s as the origin, that is, (Xe.

Yes). Although the coordinate axes X and Y can be set in any direction, in the embodiment illustrated in FIG. 4, they are set so that the positive direction of the Y axis coincides with the azimuth "north."

The comparison unit 11 compares the contents of the current position memory 9 with the contents of the reference position memory 10 and determines a predetermined set value 21, for example, a range within IKm from the destination.
When it is detected that the display mode has reached the limit, a display mode switching signal is output to a mode switching instruction section 12, which will be described later. Note that there are two types of display modes in the present invention, and a detailed explanation will be given later, one of which is a mode (hereinafter referred to as the traveling mode) in which traveling information such as the current position of the moving body is displayed on the display 15. The other one is the map display section 16
This mode (hereinafter referred to as map mode) displays a map of a desired area, such as a detailed map of the area around the destination.

The mode switching instructing section 12 instructs the CPU 14, which will be described later, to switch the display mode using the mode switching signal from the comparing section 11 or the manual input of the keys on the keyboard 13.

The CPU 14 processes the key input from the keyboard 13, and also causes the display 15 to display the current position and running direction of the moving body based on the contents of the current position memory 9 and reference position memory 10 in the running mode (specifically). (The detailed explanation will be given with reference to FIG. 6). When in the map mode, the desired map is displayed on the map display section 16. As shown in the front view of an embodiment of the present invention, the display 15 and the map display section 16 are placed next to each other so that the driver can easily see them.

As shown in an enlarged view in FIG. 6, the display 15 displays on the screen an origin 18 (corresponding to the reference point in the driving mode), a plurality of concentric circles 19 representing distances from the origin 18, north, south, east, west, and the like. An azimuth display 20 representing the azimuth of is displayed in a fixed manner.

Further, the numbers 21-+1 to 21-8 in the figure indicate the driving direction, and for example, the direction of the destination based on the current position is 2l-1tir north J, 21-2 is "northeast", etc.
..., 21-8 can be considered to indicate the "northwest" direction. Further, as shown by arrow α in the figure, the distances from the origin 18 to each concentric circle 19 are displayed. Therefore, depending on the display position of the current position display pn, which will be described later, the distance from the °C origin 18, that is, the moving object, is the reference point (
For example, you can clearly determine how far away you are from your destination (destination). In addition, in the present invention, FIG. 27(A)
As shown in the figure, a scale sheet 2 on which the concentric circles 19 and the distance indicated by the arrow a are drawn on a transparent film, for example.
2 is detachably mounted on the screen of the display 15 to display different distances. That is, a plurality of scale sheets 22 with different distance indications (arrow a in FIG. 7(A)) are prepared in advance, and replaced with a desired scale sheet 22 according to the degree of progress toward the destination. In particular, it is possible to accurately confirm the current location. In addition, the scale sheet 22
This can be done through the sheet insertion opening 23, as shown in FIG. 7(B).

Next, the display operation of the driving mode in the present invention will be explained. That is, the display of the current position on the display 15 is based on the above-mentioned reference point (the position information of the reference point is stored in the reference position memory 10) t - the above-mentioned origin 1
8 and is displayed based on the origin 18. for example,
As shown in Figure 4 above, from the starting point ps to the destination p
When traveling to destination pe (in this case, as mentioned above, the reference position memory 10 stores the position information (xe, ye) of the destination pe)
is stored), display the above destination pe
The current position is displayed as the origin 18 of 5. For example, in FIG. 4, when the vehicle reaches point pn from the starting point ps, the current position memory 9 stores the position information (Xn, Yn) of point pn as described above. Therefore, cr
tyt41, contents of the current position memory 9 (Xn, Yn)
and the contents of the reference position memory 10 (Xe.

Point Pn for the above destination pe based on
The position information (Xe-Xn, Ye-Yn) is calculated, and the point P is displayed on the display 15 as shown by the arrow Pn.
It can also be displayed as the current position corresponding to n. Also, at this time, the driving direction display 21-2 indicating the direction from point Pn to destination Pe, that is, "northeast" is lit. In this way, when the location information of the destination is stored in the reference location memory 10, the current location is displayed while being updated sequentially with the destination as a reference.

Next, the display operation in map mode in the present invention will be explained. In the present invention, a map of a desired area can be displayed on the map display section 16 by key input from the keyboard 13. The map mode can also be switched to the map mode by the mode switching instruction from the mode switching instruction section 12 described above.

That is, in the present invention, the current position is displayed in the above-mentioned driving mode until the vehicle approaches the destination by a predetermined distance after the start of travel. When the destination is reached, the map display section 16 is automatically switched to a map mode in which a detailed map of the area around the destination is displayed. Therefore, since it is possible to guide the course while looking at a detailed map, it is possible to arrive at the destination without fail. The current position display in the driving mode of the present invention is a relative position display with respect to the destination, so when approaching the destination, switch to the map mode and match the detailed map with the driving course to accurately determine the location. Be able to grasp the destination. In addition, by using both driving mode and map mode for course guidance, reliable course guidance can be performed even if there is a small error in the output of the direction sensor, sensor, or speed sensor. .

As explained above, according to the present invention, for example, a driving mode that displays the current position and driving direction based on a predetermined point such as a destination, and a map mode that displays a map of a desired area are used in combination. By doing so, it is possible to perform accurate course guidance with a relatively simple configuration, and it is possible to provide an inexpensive travel course guidance device.

[Brief explanation of the drawing]

Fig. 1 is an external view of a conventional traveling course guidance device, Fig. 2 is a block diagram showing the configuration of an embodiment of the present invention, and Fig. 3 is a block diagram showing the configuration of an embodiment of the present invention.
FIG. 4 is an explanatory diagram for explaining the principle of displaying the current position in the present invention; FIG. 5 is a front view of an embodiment of the display section in the present invention; FIG. 7(A) and 7(B) are explanatory diagrams of one embodiment of the driving mode display aspect of the present invention, and FIGS. 7(A) and 7(B) are explanatory diagrams regarding the scale sheet K used in the present invention. In the figure, 5 is a direction sensor, 6 is a speed sensor, and 7 is an X
Component calculation unit, 8 is Y component calculation unit, 9 is current position memory,
10 is a reference position memory, 11 is a comparison section, 12 is a mode switching instruction section, 13 is a keyboard, 14 is a CPU, 15 is a display, 16 is a map display section, 19ti concentric circles, 20
is the direction display, 21 is the driving direction display, 22 is the scale sheet,
23 represents a sheet insertion opening. Patent applicant Alps Electric Co., Ltd.

Claims (1)

[Claims] In a driving course guidance device that guides a driving course by displaying driving information including at least information regarding a driving direction and a driving position of a moving object, the driving course guidance device includes an output of a direction sensor and a speed sensor mounted on the moving object. A current position memory calculated based on the current position and a current position memory in which information is stored and a reference position memory in which position information of a predetermined reference point is stored, and the contents of the current position memory and the reference position memory are It is equipped with a traveling information display section that displays the current position and traveling direction of the mobile object with reference to the reference point, and a map display section that displays a map of a desired area using a map projection means, A driving course guiding device characterized in that the driving course guidance device is configured to switch the display on the driving information display section and the map display section based on the contents of the current position memory and the reference position memory.