JPS6057068B2 - Automotive course guidance system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-vehicle course guidance system that moves a point light source displayed on a map as the vehicle travels to confirm the driving position. The present invention provides an on-vehicle course guidance system that is equipped with a detector that detects when the point light source overruns the map, and that can automatically update the map based on the output of the detector.

FIG. 1 is a perspective view showing an operation section and a display section of a conventional vehicle-mounted course guidance system. In general, in-vehicle course guidance systems display a map and a bright spot indicating the current position on the screen 1, and as you drive, the point light source indicating the current position moves and the trajectory is displayed on the map. The current location and travel trajectory are displayed. In the conventional example shown in FIG. Input using the scale setting switch. The driver drives for a while, traces the driving trajectory on the CRT display surface, and overlaps the driving trajectory with the map sheet 2 held closely to the CRT display surface by moving the driving trajectory using the XYθ switch 3. Correct the discrepancy between the combined map and the driving trajectory and perform initial settings. Then, as you start driving towards your destination, the bright spot that indicates your current location moves as you drive, and when the bright spot overruns the map, a new map is displayed and the same initialization as above is displayed on the CRT display screen. It was necessary to configure the settings and match the map. For this reason, even if the map sheet 2 has a scale of, for example, 1:250,000, when driving at high speed, the travel time for one map is short, about 2 minutes, and the map must be replaced or adjusted frequently. First, there were drawbacks such as the fact that this work was very troublesome.

The present invention eliminates the drawbacks of such conventional devices, and provides an X-direction moving body that supports a lamp when the lamp is likely to overrun on a map projected and displayed using a lamp as a point light source. It is also equipped with a detection switch that detects moving objects in the Y direction, updates the map, and moves the lamp to prevent overruns.

FIG. 2 is a block diagram showing an in-vehicle course guidance system according to the present invention, in which the current position is determined by the CPU, which is a control device, and outputs from a vehicle speed sensor 4 and a direction sensor 5 mounted on the vehicle.
(intermediate processing device) 6 performs arithmetic processing on the X-direction component and Y-direction component and detects the current position information memory 7
record from time to time.

Then, from the recorded information, only necessary information is read out according to the scale of the map and inputted to the current position driving device 8, and the current position driving device 8 sends a driving signal to move the point light source in the X and Y directions to the display device. 10 to display the current position. When the lamp is about to overrun on the map displayed on the display device 10, it is detected by a detector provided in the display device 10, and a signal is sent from the display device 10 to the CPU 6, so that the lamp will overrun the map displayed on the display device 10. The CPU 6 sends a signal to the map driving device 9 to update the map to the required map. At the same time, the CPU 6 sends a signal to the current position driving device 8 to move the lamp. FIG. 3 is a schematic diagram illustrating the function of the detection switches 11 and 12 provided in the display device 10 of the present invention, and FIG. 4 shows the map drive device and current position drive in the implementation state of FIG. It is a schematic perspective view showing the structure of the device.

A detection switch 11 is provided on a Y-direction movable body 14 that moves in the Y direction, and an X-direction movable body 13 on which a point light source lamp 15 is mounted moves in the X direction on the Y-direction movable body 14. The detection switch 11 is provided to operate when the user moves to the limit display position of the map in the X direction of one frame displayed on the display device 10, that is, near the edge of the projected map. Further, the Y-direction detection switch 12 is provided to operate when the Y-direction moving body 14 moves in the Y direction to the map limit display position of one frame, that is, near the edge of the projected map. Ru. Detection switch 11,1
2 operates, a detection signal is sent to the CPU 6, and the CPU 6
A signal instructing how much to move in which direction is input to the map drive device 9, and the map is updated by driving the map drive device 9. At this time, at the same time as the signal for updating the map is output, a signal for moving the point light source lamp 15 is input from the CPU 6 to the current position driving device 8, and the current position driving device 8 operates to move the point light source lamp 15. moves,
When updating the map in the X direction, the Y direction moving body 14 stops moving, the X direction moving body 13 is moved in the same direction as the map movement, and the point light source lamp 15 is stopped on the map before updating. The updated start point is set from the point. When the map is updated in the Y direction, the x-direction moving body 13 stops moving, the Y-direction moving body 14 moves, and the starting point is set in the same manner. In addition, in FIG. 4, only one frame from the map sheet 16 for projection is illustrated, but the map sheet 1
For example, if 6j is configured to be enlarged and displayed using a microfiche that can accommodate about 60 frames per page as shown in Figure 5, about 1 frame is sufficient to display the whole country, and the user can If you prepare a few sheets of microfiche before driving, it is usually enough for one day's driving. Also,
The x-direction and Y-direction moving bodies 13 and 14 are moved using motors, but since these motors are controlled by the CPU 6,
It can be driven very accurately. As described above, the present invention provides an in-vehicle course guidance system with a detection switch that detects when a point light source representing the current position comes near the edge of the map while driving, and a signal from the detection switch. Because the map is configured to update automatically, it is no longer necessary to replace the map for each frame or match the maps as in the past, and it is now possible to use microfiche, etc., which can accommodate multiple frames of maps on one map. This has extremely great effects, such as extending the distance traveled on a single map.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the operation section and display section of a conventional vehicle-mounted course guidance system, FIG. 2 is a block diagram showing the vehicle-mounted course guidance system l according to the present invention, and FIG. 3 is a detector according to the present invention. Fig. 4 is a schematic perspective view showing a part of the structure of the map drive device and current position drive device in the installed state shown in Fig. 3, and Fig. 5 shows map frame storage using microfiche. It is an explanatory diagram showing a state. 1...Screen, 2,16...Map sheet, 3...XYθ switch, 4...
・Vehicle speed sensor, 5...Direction sensor, 6...
...CPU (Central Processing Unit), 7...Memo I88
...Current position drive device, 9...Map drive device, 10...Display device, 11, 12...Detection switch, 13...X direction Mobile object, 14.
... Y direction moving body, 15 ... Point light source lamp.

Claims (1)

[Claims] 1. In an in-vehicle course guidance system that displays the current position on a map by moving a light source while driving, a detector detects the position of the light source when the light source is located near an edge of the map. An in-vehicle course guidance system characterized in that a map drive device and a current position drive device are operated by a detection signal from the detector to update the map and move the light source.