JPS6359448B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a travel guide device, and more particularly to a travel guide device suitable for displaying an image of a travel route necessary for traveling a vehicle such as an automobile.

Driving guide devices that can display driving routes as images are less time-consuming than searching for destinations and targets from an atlas, and because you can always check your current location on the displayed map, you can easily navigate even in unfamiliar areas. Various devices have been proposed because they reduce the chance of getting lost and are more convenient for driving. However, some of these devices display the driving route from the departure point to the destination as a single image. This type of device has the disadvantage that it is difficult to see details when the distance from the departure point to the destination is long.
Therefore, a device has been proposed in which a driving route map from a departure point to a destination is divided into a plurality of driving route sections, and the divided driving route maps are sequentially switched and displayed in accordance with the travel of the vehicle.

However, with this type of travel guide device, when the vehicle travels on a predetermined travel route, divided travel route maps are sequentially switched and displayed according to the vehicle's travel; When the vehicle travels on a road different from the current travel route, a travel route map different from that on which the vehicle is traveling is displayed as an image.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to switch a driving route map divided into a plurality of sections according to the course of the vehicle, and to switch the next driving route map to be changed to a vehicle. An object of the present invention is to provide a travel guide device that can smoothly perform a map switching operation by selecting based on the travel direction of the map.

The travel guide device according to the present invention includes a memory that divides a vehicle travel route map including a departure point and a destination into a plurality of travel route sections and stores these sections in advance, and a travel distance sensor that detects the travel distance of the vehicle. , a direction sensor that detects the running direction of the vehicle, a display device that displays images for guiding the vehicle from the starting point to the destination, and detection of image information based on the stored contents of the memory and the mileage sensor and the direction sensor. a control device that causes a display device to display a driving route map corresponding to the driving position and the driving position based on driving position information from a traffic signal; The driving route map included in the quadrant indicated by the driving direction of the vehicle is selected and updated based on the memory position of the displayed travel route map and the memory position of the travel route map.

First, the display device displays a travel route section that includes the departure point of the vehicle. When the vehicle starts traveling, the current traveling position of the vehicle is detected by a travel distance sensor and a direction sensor, and is displayed on the displayed map. This allows the occupant to drive while checking the current location of the vehicle.

Here, when the vehicle leaves the range of the displayed travel route section, the display is switched to a designated travel route map based on the travel position information at that time. When selecting a corresponding driving route map from among multiple driving route maps adjacent to the displayed driving route map, the one included in the quadrant indicated by the current driving direction of the vehicle is selected as the next driving route map. Ru. That is, the orientation sensor detects the direction in which the vehicle is traveling at the current location, and a travel route map in which the vehicle will travel from this current location is selected and displayed on the display device.

As a result, the current position of the vehicle is always displayed, and the driving of the vehicle can be reliably guided.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a preferred embodiment of the invention. In the figure, a CRT 10 is provided as a display device for displaying an image of the travel route of the vehicle. This CRT10 has a resolution of 256 horizontal x vertical
There are 192 dots, and the driving route map is displayed within this range. The image is displayed by selecting dots based on coordinates. A control device 12 for controlling the CRT 10 is provided, and this control device 12 includes a CPU (central processing unit) 14 that performs various calculations, a non-volatile memory (ROM) 1
6, volatile memory (RAM) 18, interface 20, and CRT controller 22.
These devices are connected via a bus line 24.

In addition, a cassette tape recorder 26 is used as a memory for storing image data of the travel route, etc.
is provided. Cassette tape recorder 26
has a configuration of 2 to 4 tracks, of which 1 track is used for audio. The content recorded on this track is converted into an electrical signal, amplified by an amplifier 28, and then output as audio from a speaker 30. One of the remaining tracks is used as image information of the driving route, and a driving route map divided into a plurality of sections is recorded for each section. This image information is recorded in the Kansas City Standard Format, the Kansas City Standard Format, etc. This information is then supplied to interface 20 via cassette interface 32. If the recorded content is Kansas City Standard, the cassette interface 32 modulates the output signal of the interface 20 at a transfer rate of 300 ports and demodulates the output signal of the cassette tape recorder 26 (in this case, (It is output as a serial signal from the interface 20).

A keyboard 34 is also provided to supply various command data to the CPU 14. The keyboard 34 is provided with keys for specifying various modes and control keys, and when these keys are operated, the contents of the operated key are supplied to the interface 20 via the encoder 36. The encoder 36 converts the contents of the key into, for example, ASCII (ASCII).
II) Convert to code and output.

Furthermore, a vehicle speed sensor 38 is provided as a distance detector to detect the distance traveled by the vehicle. The vehicle speed sensor 38 includes a pulse generator that generates pulses in accordance with the number of rotations of the tires of the vehicle, detects the pulse signal of this pulse generator, and sends the detection signal to the CPU 1 via the interface 20.
Supply to 4.

Further, a direction sensor 40 is provided as a direction detector for detecting the running direction of the vehicle. The direction sensor 40 detects the direction of the vehicle by detecting other magnetic fields, and sends a detection signal to the interface 20.
is supplied to the CPU 14 via. Then, based on the detection signals of the vehicle speed sensor 38 and the direction sensor 40,
By the CPU 14 performing predetermined calculations, the CRT
The traveling position information of the vehicle on the display image No. 10 is calculated.

The ROM 16 has a built-in monitor program, and this program includes a program for processing image information of the travel route, a program for processing information from an external connector, and a program for controlling and displaying the cassette tape recorder 26. It is.
The RAM 18 is used to temporarily store cassette tape data, calculation intermediate values, etc., and is divided into memory whose contents are erased by a reset when the power is turned off (turning off the ignition switch), and CMOS RAM which can be backed up. have

The CRT controller 22 is a bus controller.
It is composed of a character generator, a signal converter, a synchronous signal generator, etc., and controls the CRT 10 based on a program.

The driving route map displayed on the CRT10 (hereinafter MAP
) displays a driving route map of one of the plurality of driving route sections. The MAP displayed on the CRT 10 is displayed including portions that overlap with other adjacent travel route sections. That is, as shown in Figure 2,
If the MAP is divided into nine sections and the section to be displayed on the CRT 10 is MAP "0", the image information for one section recorded on the cassette tape is
It is recorded including the overlap part between MAP "0" and adjacent MAPs "1" to "8". This overlap part is areas a1, a2, a3,
a4, areas b1, b2, b3, and b4. And areas a1, a2, a3,
a4 is MAP “0”, “2”, “3”, “4”, respectively.
MAP “0”, “4”, “5”, “6”, MAP “0”,
“6”, “7”, “8”, MAP “0”, “8”, “1”
，
“2” is the overlapping part, and areas b1, b2, b3, and b4 are MAP “0” and
“2”, MAP “0”, “4”, MAP “0”, “6”,
This is the part where MAP “0” and “8” overlap. In this way, the MAP of each section of the cassette tape
The MAPs of adjacent sections are recorded in an overlapping manner, so they are displayed on the CRT10.
The MAP includes parts that overlap with other sections. This is to make it easier to see when the MAP is switched to a MAP for another section.

When the MAP is displayed on the CRT 10 using the image information recorded on the cassette tape and the vehicle starts traveling, the vehicle speed sensor 38 and direction sensor 4 are activated as the vehicle travels, as shown in FIG.
The traveling position of the vehicle is displayed as a traveling trajectory T on the CRT 10 based on the traveling position information based on the detection signal of 0. When the traveling position of the vehicle is displayed at the displayed MAP change point, a MAP switching calculation is performed based on the position information at this change point, and the calculation result is supplied to the cassette tape recorder 26 as a MAP switching command. Also, display
The MAP change points are as shown in Figure 3.
It is set to lines L1, L2, L3, and L4 at the four corners of the MAP.

By the way, the present invention provides a method for displaying images adjacent to the display MAP.
It is characterized by selecting a MAP suitable for the vehicle's progress from among the MAPs, and depending on which line change point the vehicle's running position is displayed and which direction the vehicle is running at that display position.
I'm trying to select a map.

For example, the position of the vehicle at the MAP change point is
As shown in FIG. 3, when the vehicle is on the line L1 and between change points A and B, the driving direction (Dr) of the vehicle is changed as shown in the flowchart of FIG.
A MAP is selected depending on whether the MAP is included in one of the first to fourth quadrants. That is,
If the driving direction of the vehicle is in the first quadrant, MAP “2”
However, if it is in the second quadrant, MAP "3" is selected, if it is in the third quadrant, MAP "4" is selected, and in the case of the fourth quadrant, the displayed MAP, that is, MAP
“0” remains displayed. Also, if the vehicle's position is on the line between change points B and C, MAP "2" is selected when the vehicle's running direction is in the 1st or 2nd quadrant, and MAP "2" is selected if it is in the 3rd or 4th quadrant. “0” remains displayed. Furthermore, if the vehicle's position is on the line between change points C and D, MAP "1" is selected when the vehicle's driving direction is in the first quadrant, and MAP "0" is displayed when it is in the second quadrant. stay as it is,
In the case of the fourth quadrant, MAP "8" is selected. Even when the vehicle is located on lines L2, L3, and L4, the MAP is selected depending on which quadrant the traveling direction of the vehicle is included in, as in the case described above. MAP selection in these cases is shown in FIGS. 4 and 5, and the explanation thereof will be omitted.

The method for selecting a MAP at a MAP change point has been described above, and now we will explain how the cassette tape recorder is driven by a MAP selection command. In other words, the position of the vehicle is
When the MAP change point is displayed, the MAP is selected depending on the driving direction of the vehicle, but after the MAP is selected, it is necessary to drive the cassette tape recorder 26. That is, as shown in FIG. 6, the cassette tape has spare parts S1 to Sn in which spatial parts or constant frequency signals are recorded, and data recording parts D1 to D1.
Dn, and each data recording section has a 7th
As shown in the figure, start marker M1, MAP
It is composed of image information M2 and end marker M3. Therefore, when a MAP switching command is output, it is necessary to drive the cassette tape recorder 26 in order to set the data recording section of the MAP corresponding to the command at a predetermined position.

As shown in the flowchart of FIG. 8, in step 100, when it is determined YES and a MAP switching command is output, in step 102, the number (number) of the data recording section of the MAP to be displayed next is determined. D1 to Dn in Figure 6) is number N (N=1, 2, 3...n) than the currently displayed MAP.
A determination is made as to whether or not it has been recorded first.
NO in step 102, that is, the following display
When it is determined that the MAP has been wound before the Nth position, in steps 104, 106, and 108,
The cassette tape is rewound until N spare parts S1 to Sn are counted, and when N spare parts are counted, the cassette tape is stopped at a predetermined position in step 100.

Next, the process moves to step 112, and when the cassette tape recorder 26 starts playing, the image information of the data recording section of the MAP selected by the switching command is displayed.
Displayed on CRT10. The reproduction drive of the cassette tape recorder 26 continues, and when the end marker M3 of the cassette tape is detected in step 114, the reproduction drive of the cassette tape recorder 26 is stopped. (Step 116).

On the other hand, if YES is determined in step 102, the cassette tape is fast-forwarded according to steps 118 and 120 until N spare parts are counted, and when N spare parts are counted, the cassette tape is fast-forwarded. is stopped (step 110),
Thereafter, processing according to steps 112, 114, and 116 is performed.

If the determination at step 100 is NO, the process goes to step 122 and the currently displayed MAP continues to be displayed.

As explained above, the travel guide device according to the present invention switches the travel route map divided into a plurality of sections according to the course of the vehicle, and determines the next travel route map to be changed based on the travel direction of the vehicle. This has an excellent effect in that the map switching operation can be performed smoothly by selecting the map.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram for explaining the configuration of MAP,
Fig. 3 is an explanatory diagram for explaining MAP switching, Figs. 4 and 5 are flowcharts for explaining MAP selection, and Fig. 6 is an explanatory diagram for explaining the configuration of the cassette tape. 7 are explanatory diagrams for explaining the contents of the data recording section, and FIG. 8 is a flowchart for explaining the running of the cassette tape. 10...CRT, 12...control device, 26...
Cassette tape recorder, 34...keyboard,
38...Vehicle speed sensor, 40...Direction sensor.

Claims (1)

[Claims] 1. A memory that divides a vehicle travel route map including a departure point and a destination into a plurality of travel route sections and stores them in advance, a travel distance sensor that detects the travel distance of the vehicle, and a travel distance sensor that detects the vehicle travel direction. A direction sensor, a display device that displays images for guiding the vehicle from a departure point to a destination, and image information based on the memory contents and travel position information based on detection signals of the travel distance sensor and the direction sensor. a control device that displays a travel route map and a travel position corresponding to the travel position on a display device; A driving guide device characterized in that a driving route map included in a quadrant indicated by a driving direction is selected and updated and displayed based on a memory position of the displayed driving route map and a memory position of the driving route map.