JPS6363047B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an on-vehicle course guidance system, and its purpose is to display a display device as necessary.
Detects the presence or absence of the vehicle speed sensor signal and determines the absolute direction and direction.
To provide an in-vehicle course guidance system equipped with a mode switching device that automatically switches between a driving mode that displays a destination location, etc., and a map mode that displays a map and driving direction.

FIG. 1 shows a conventional vehicle-mounted course guidance system, and FIG. 2 is an explanatory diagram illustrating a method of inputting initial values (starting point, relay point, destination) in the conventional vehicle-mounted course guidance system.

After setting the departure point 9 using the initial value select switch 1 before traveling, a relay point 10 is determined by referring to a dedicated map 8 divided at regular intervals to minimize the error between the actual travel route and the system. is set with the initial value select switch 1, and the direction and distance from the starting point 9 to the relay point 10 in the north, east, west, and north directions are read from the dedicated map 8 using the direction setting switch 2 and the distance setting switch 3. Enter YKm in the field. To set the destination 11, similarly, the direction from the relay point 10 to the destination 11 and the distance in the north, south, east, and west directions are input.

While the vehicle is running, the speed of the vehicle is displayed on the speed display 4 based on the output of the vehicle speed sensor, and the absolute direction is displayed on the absolute direction display 6, so that it is possible to check in which direction the vehicle is currently traveling. Further, the direction from the current position to the destination 11 is displayed on the destination position display 6 by calculating the output of the vehicle speed sensor and the direction sensor, and the degree of arrival to the destination 11 is calculated between the initial value and the current position. The destination attainment degree is displayed on the bar display 7 through arithmetic processing with the travel progress.

In the conventional in-vehicle course guidance system as described above, only the absolute direction at the current location, the destination location, and the degree of arrival to the destination can be obtained, so it is impossible to know the current location on the map. Instead, the initial values were input by referring to a dedicated map and reading the approximate direction and distance to the destination, which resulted in poor accuracy and inconvenience in operation. In addition, an in-vehicle course guidance system was devised that could display the route along with the map, but since it was dangerous for the driver to check the route while driving, the display was turned off while driving. Therefore, there were drawbacks such as the inability to obtain driving information while driving.

The present invention eliminates the drawbacks of the conventional system, and FIG. 3 shows a block diagram of the on-vehicle course guidance system according to the present invention, and FIG. 4 is a perspective view of the on-vehicle course guidance system according to the present invention. It shows. Further, FIG. 5 shows a driving mode in which the absolute direction 25, the destination position 26, and the degree of arrival from the current position to the destination 27 are displayed on the screen 20 consisting of an LCD display device, and FIG. shows the map mode where the driving trajectory and map are displayed. Note that the map is projected and displayed from the back of the screen 20 only in the map mode (not shown), and other displays are provided by the control device.
The LCD is driven by a signal from the CPU 15 and displayed on the screen 20, and each display content can be recognized on the screen 20.

First, when inputting the starting point and destination before driving, a microfilm with a map drawn on it and a projector are used to project it onto the screen 20 from the back, and the map is searched while directly viewing the map projected on the screen 20. Operate the switch 21 to select the map showing the departure point and destination,
By aligning the bright spot displayed on the screen 20 with the destination on the map using the XYθ switch 22 and setting the memory key 23, the destination is input to the coordinate detector 12 and recorded in the traveling information memory 16. Further, the starting point can be determined by aligning the bright spot on the screen 20 with the starting point on the map, and the initial setting is completed.

While the vehicle is running, the outputs from the vehicle speed sensor 13 and direction sensor 14 are processed by the CPU 15 to obtain a signal indicating the current position, and this signal is recorded in the running information memory 16. The signal once recorded in this way is read out from the driving information memory 16.
The display device 19 displays a driving mode that is processed by the CPU 15 and displays the absolute direction, destination position, and degree of arrival to the destination as shown in FIG. A signal is output to update the map as necessary.

Furthermore, as shown in FIG. 6, when displaying a map and a travel trajectory, the vehicle speed sensor 13 and direction sensor 1 are
The output of 4 is calculated by the CPU 15 to obtain a signal indicating the current position. This signal indicating the current position is recorded in the traveling information memory 16, and the display device 1
9, display the current position, and also input the CPU1
5 reads out from the traveling information memory 16 all the data recorded before the present time for indicating the traveling trajectory, and inputs it to the display device 19 to display the traveling trajectory.

Further, a signal indicating the current position is input from the CPU 15 to the map projection device 18. When the current position reaches the edge of the map projected on the screen 20, the map can be automatically updated.

In addition, when displaying the driving mode, the absolute direction can be displayed as a signal that has been processed by the output CPU 12 of the direction sensor 11, and there is no need to read the data from the driving information memory 16 and perform further calculation processing. Achievement level is in driving information memory 1
The CPU 15 can calculate and display the data of the destination recorded in the CPU 15 and the data indicating the current position recorded while the vehicle is running.

Normally, the driving mode and the map mode are switched by inputting the signal from the vehicle speed sensor 13 to the mode switching device 17, detecting the presence or absence of the signal, and automatically switching. That is, when the vehicle is stopped and there is no output from the vehicle speed sensor 13, the map mode is displayed, and when the vehicle is running and there is an output from the vehicle speed sensor 13, the driving mode is displayed.

As described above, since the present invention is configured so that two modes can be displayed on the in-vehicle course guidance system, when there is only one driver, the distance from the current position to the destination, the destination position, The driving mode that displays the absolute heading is displayed, and the mode can be forcibly switched using the output from the vehicle speed sensor, so the driver can easily check the minimum amount of information, and if necessary, the driving mode can be stopped. Since you can switch to a map mode that displays the driving route and a map, you can easily determine your current location, eliminating the need to open an atlas and check your current location, which was required in the past. Furthermore, the initial values can be entered while directly viewing the screen on the projected map, which greatly simplifies operation and improves accuracy.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional in-vehicle course guidance system, and Figure 2 is a perspective view of a conventional in-vehicle course guidance system.
FIG. 3 is a block diagram for explaining the in-vehicle course guidance system of the present invention, FIG. 4 is a perspective view showing an embodiment of the present invention, and FIG. This figure shows a perspective view of a screen showing the display state of the driving mode in the embodiment of FIG. 4, and FIG. 6 is a perspective view of a screen showing the display state of the map mode on the same screen. 1... Initial value selection switch, 2... Direction setting switch, 3... Distance setting switch, 4... Speed indicator, 5, 25... Absolute direction indicator, 6, 2
6... Destination position indicator, 7, 27... Destination attainment bar indicator, 8... Dedicated map, 9... Departure point, 12... Coordinate detector, 11... Destination, 13
...Vehicle speed sensor, 14...Direction sensor, 15...
CPU (Central Processing Unit), 16...Driving information memory,
17...Mode switching device, 18...Map projection device, 19...Display device, 20...Screen, 2
1...Map search switch, 22...XYθ switch, 23...Memory key, 24...Mode select switch, 10...Relay point.

Claims (1)

[Claims] 1. Equipped with a coordinate detector, a vehicle speed sensor and a direction sensor, and a control device that calculates and processes the output signals of the coordinate detector, vehicle speed sensor, and direction sensor, and determines the absolute direction and destination based on the output signals of the control device. In an in-vehicle course guidance system that has a display device that displays a driving mode that displays the location, etc., and a map mode that displays a map/travel trajectory based on the output signal of the control device, the presence or absence of a signal from the vehicle speed sensor is detected. A vehicle-mounted course guidance system comprising a mode switch for switching between the driving mode and the map mode.