JPH0545885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a driving course guiding device, in particular, a device for predetermining, for example, the current position and traveling direction of a moving object, based on the outputs of a direction sensor and a speed sensor mounted on the moving object, such as an automobile. A travel information display section that displays a reference point based on the reference point and a map display section that displays a map of a desired area using a map projection means are separately provided, and the travel information is displayed in correspondence with the distance traveled from the reference point. The present invention relates to a driving course guidance device that automatically switches between a 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 guiding device is placed, for example, in front of the driver's seat, and as shown in FIG. A map sheet 3 drawn on a transparent film, for example, is configured to be attachable to and detachable from the front of the display screen. The attached map sheet 3 is fixed by a map fixing means 4 so that the traveling 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 the display screen and the 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 and it is no longer available at an affordable price. Therefore, there is a strong desire among consumers for a travel course guidance device that is simple and inexpensive to obtain, since it is sufficient to have a substantial course guidance effect without the need for the above-mentioned high-class device.

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 traveling 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, Fig. 3 is an explanatory diagram regarding current position information in the embodiment shown in Fig. 2, and Fig. 4 is a diagram for explaining the principle of displaying the current position in the present invention. An explanatory diagram, FIG. 5 is a front view of one embodiment of the display section in the present invention, and FIG.
The figure is an explanatory diagram of one embodiment of the driving mode display mode in the present invention, and FIGS. 7A and 7B are explanatory diagrams regarding a scale sheet used in the present invention.

In FIG. 2, reference numeral 5 is a direction sensor, 6 is a speed sensor, 7 is an X component calculation section, 8 is a Y component calculation section, 9 is a current position memory, 10 is a reference position memory, 11 is a comparison section, and 12 is a mode switching instruction section,
13 is a keyboard, 14 is a CPU, 15 is a display, and 16 is a map display section.

The direction sensor 5 detects the traveling direction of the moving body 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 Y component calculation section 8 will be explained with reference to FIG. Code 1 in the diagram
7 is a running course, which represents the running route from the starting point Ps to the current position Pn. Moreover, the points P ₁ , P ₁ , P ₂ , ... on the driving course 17 are as follows:
This corresponds to the first, second, third, . . . clock pulses output from the speed sensor 6 after leaving the starting point Ps. Therefore, based on the angle information output from the direction sensor 5, the points P ₀ , P ₁ , P ₂ ,
The changes x ₀ , x ₁ , x ₂ , ... on the X axis are calculated in the X component calculation unit 7, and the changes y ₀ ,
y ₁ , y ₂ , . . . are calculated in the Y component calculation unit 8. Then, the X-component calculating section 7 and the Y-component calculating section 8 output the cumulative values of the X-component change and Y-component change. That is, for example, when the current position Pn is reached, the X component calculation section 7 calculates (x ₀ +
x ₁ +...+x _o-1 ), that is, Xn, is output, and the Y component calculation section 8 outputs (y ₀ +y ₁ +..., y _o-1 ), that is, Yn.

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

The reference position memory 10 is stored from the keyboard 13.
Position information of a predetermined reference point input via the CPU 14 is stored. For example, if a destination is selected as the reference point, the X and Y components from the starting point to the destination are determined from a map and stored in the reference position memory 10 before the start of travel.
Store in. To explain specifically with reference to FIG. 4, when the point Ps on the map shown in FIG. 4 is the starting point and the point Pe is the destination, the reference position stored in the reference position memory 10 is The information is
These are the coordinate values of the destination Pe with the starting point Ps as the origin, that is, (Xe, Ye). Note that the coordinate axes X and Y can be set in any direction, but in the embodiment shown in FIG. 4, the positive direction of the Y axis is the azimuth "north".
is set to match.

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 setting value, for example, when it detects that the destination is within 1 km, as will be described later. A display mode switching signal is output to the mode switching instruction section 12. Note that there are two types of display modes in the present invention, which will be described in detail later, one of which is a mode in which traveling information such as the current position of the moving object is displayed on the display 15 (hereinafter referred to as the traveling mode).
The other mode is a mode (hereinafter referred to as map mode) in which the map display section 16 displays a map of a desired area, for example, a detailed map around the destination.

The mode switching instructing unit 12 instructs the CPU 14 (to be described later) to switch the display mode using a mode switching signal from the comparing unit 11 or a key input from the keyboard 13.

The CPU 14 processes key inputs from the keyboard 13, and also displays the current position and running direction of the moving body on the display 15 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 one 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 includes an origin 18 (corresponding to the reference point in the driving mode), a plurality of concentric circles 19 representing distances from the origin 18, and north, south, east, west, and other circles on the screen. An azimuth display 20 representing the azimuth of is displayed in a fixed manner.
Further, the symbols 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, that is, 21-1 is "north", 21-2 is "northeast", etc. ..., 21-8 can be considered to indicate the "northwest" direction. Furthermore, as shown by arrow a in the figure, each concentric circle 1 is
Distances up to 9 are displayed. Therefore, the origin 18 is determined by the display position of the current position display Pn, which will be described later.
In other words, the distance from the reference point (for example, the destination) can be determined at a glance. In the present invention, as shown in FIG. 7A, a scale sheet 22 on which the distances of the concentric circles 19 and arrows a are drawn on, for example, a transparent film is removably mounted on the screen of the display 15. By doing so, the system is configured to display different distances. That is, a plurality of scale sheets 22 with different distance indications (arrow a shown in FIG. 7A) are prepared in advance and replaced with a desired scale sheet 22 according to the degree of travel progress toward the destination. This makes it possible to accurately confirm the current location. Note that the scale sheet 22 can be replaced through the sheet insertion opening 23 as shown in FIG. 7B.

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 takes the aforementioned reference point (the positional information of the reference point is stored in the reference position memory 10) as the origin 18, and is displayed with the origin 18 as a reference. . For example, when traveling from the starting point Ps to the destination Pe, as shown in FIG. ), the current position is displayed with the destination PC set as the origin 18 of the display 15. For example, in Figure 4, from the starting point Ps to the point Pn
When the current position memory 9 reaches the point Pn, the position information (Xn, Yn) of the point Pn is stored in the current position memory 9 as described above. Therefore, the CPU 14 uses the contents (Xn, yn) of the current position memory 9 and the reference position memory 1.
The above destination based on the contents of 0 (Xe, Ye)
Position information of point Pn with respect to Pe, i.e. (Xe−Xn,
Ye-Yn) can be calculated and displayed on the display 15 as the current position corresponding to the point Pn as shown by the arrow Pn in the figure. Also, at this time, the traveling 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-described driving mode until the vehicle approaches the destination within a predetermined distance after the start of travel, and the current position is displayed within a predetermined distance range of the destination, for example, 1 km. When the destination is reached, the map display section 16 is automatically switched to a map mode in which a detailed map of the vicinity of 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 position display relative to the destination, so when the destination is approached, the current position is displayed in the map mode and the detailed map is matched with the driving course. You can know the exact destination. In this way, by using both the driving mode and the map mode for course guidance, reliable course guidance can be performed even if a small error occurs in the output of the direction 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 even with a relatively simple configuration, and it is possible to provide an inexpensive travel course guidance device.

[Brief explanation of the drawing]

Figure 1 is an external view of a conventional driving course guidance device.
Fig. 2 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 3 is an explanatory diagram regarding current position information in the embodiment shown in Fig. 2, and Fig. 4 is a diagram for explaining the principle of displaying the current position in the present invention. An explanatory diagram, FIG. 5 is a front view of one embodiment of the display section in the present invention, and FIG.
The figure is an explanatory diagram of one embodiment of the driving mode display mode in the present invention, and FIGS. 7A and 7B are explanatory diagrams regarding a scale sheet used in the present invention. In the figure, 5 is a direction sensor, 6 is a speed sensor, 7 is an X component calculation unit, 8 is a Y component calculation unit, 9 is a current position memory, 10 is a reference position memory, 11 is a comparison unit, and 12 is a mode switching instruction 13 is the keyboard, 14 is the CPU, 15 is the display, 16
is the map display section, 19 is the concentric circle, 20 is the direction display,
21 represents a running direction display, 22 represents a scale sheet, and 23 represents a sheet insertion slot.

Claims (1)

[Scope of Claims] 1. A driving course guidance device that guides a driving course by displaying driving information including at least information regarding the driving direction and driving position of a moving object, comprising: a map display that displays a map; and a moving object. an operating section for inputting instructions to the driving course guidance device; and outputs of a direction sensor and a speed sensor mounted on the moving body. a current position memory in which current position information calculated based on the current position information is stored, and a reference position memory in which position information of a predetermined reference point is stored; In addition to displaying the direction and driving position, the map is configured to be displayable in the map display, and based on the contents of the current position memory and reference position memory, the current position is within a predetermined distance range from the reference point position. is configured to detect that the reference point has been reached and display a detailed map around the reference point on the map display; A travel course guidance device characterized by being configured to display information.