JPS61182199A - Running route display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a travel route display device for displaying the current position and travel trajectory of a moving body such as an automobile on a screen on which a map is set in advance.

BACKGROUND ART Recently, as will be explained in detail later, 1. For example, when driving a car in an unfamiliar area, in order to provide appropriate guidance so that the driver does not deviate from the planned driving course and get lost, the driving of the car, etc. Along with this, the distance detector detects the traveling distance according to the vehicle speed, and the direction detector detects the direction of travel and the amount of change thereof, and the current position of the vehicle on two-dimensional coordinates is sequentially calculated from each detected value. By storing the results in memory and displaying them as continuous point information that changes every moment on a display screen that shows a map of the road, etc., the driver can confirm the current location. A driving route display device has been developed.

However, in such a driving route display device, it is unavoidable that position errors occur due to the accuracy of each detection when detecting distance and direction according to the driving condition of the car, etc., and as the car etc. progresses, There is a problem in that the errors accumulate and the current position and the travel trajectory up to that point deviate from the road on the map.

Therefore, in the past, an operating means was provided that could move the driving trajectory displayed on the screen in parallel or rotationally by key operation. The current position and the travel trajectory up to that point can be corrected by key operations.

1 flag The present invention has been made in consideration of the above points.

When the driving trajectory deviates from the road etc. on the map.

To provide a travel route display device that allows at least the current position to be easily corrected.

Another object of the present invention is to provide a driving route display device that allows the driver to easily correct the deviated driving path when the driving path deviates from the road or the like on the map.

In order to achieve the objective, the present invention automatically detects the current position on the map by directly indicating the current position on the screen using the input device when the driving trajectory deviates from the road etc. on the map. This allows the current position and/or travel trajectory to be corrected.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an example of the configuration of a travel route display device according to the present invention, and its basic configuration includes, for example, a photoelectric two-electromagnetic type that outputs a pulse signal for each unit travel distance according to the rotation of a car tire. A distance sensor 1 using a type or a mechanical contact type, a direction sensor 2 that outputs a signal proportional to the amount of direction change as the car travels, and a direction sensor 2 that is composed of a gyroscope or the like that detects changes in angular velocity in one direction, for example, and a distance sensor 1. The distance traveled by the vehicle is measured by counting the number of pulse signals from the direction sensor 2, and the position on the two-dimensional coordinates for each unit distance traveled by the vehicle is determined by calculating the change in the direction of travel according to the output signal of the direction sensor 2. A signal processing device 3 consisting of a CPU, program ROM, control RAM, etc., which is determined by sequential calculations and centrally controls the entire system, and a position on two-dimensional coordinates that changes every moment, determined by the signal processing device 3. a driving trajectory storage device (RAM) 4 that sequentially stores the data of the vehicle and holds it as finite continuous position information corresponding to the current position of the vehicle; a map information storage medium 5 that stores map information in advance; A storage medium playback device 6 selectively reads out necessary map information from the storage medium 5, displays a map surface image on a screen according to the read map information, and displays positions stored in the travel trajectory storage device 4. A display bag @ 7 displays the vehicle's current position, previous travel trajectory, current direction of travel, etc. on the same screen every moment based on the data, and gives operation commands to the signal processing device 3 and displays them on the display device 7. to select and specify the map to be displayed, to set the starting point of the vehicle on the displayed map, to change the direction of the displayed map and the driving trajectory, to shift the display position, and to partially enlarge the map and the driving path 2 It is comprised of an operating device 8 that can appropriately change display format settings such as selecting a display scale.

With this configuration, the selectively read map is displayed on the screen of the display device 7, and the signal processing device 3 presets the map according to the vehicle travel from the starting point set on the map. The current position on the X-Y coordinates (X+y) according to the scale of the map
is determined by calculation every moment, and the calculation results are sequentially sent to the travel trajectory storage device 7 to update the storage contents, and the storage contents are constantly read out and sent to the display device 7. As a result, as shown in FIG. 2, the display device 7 displays a display mark Ml indicating the current position of the vehicle on the map displayed on the screen.

A display mark M2 indicating the direction of travel of the vehicle at the current position and a travel trajectory display mark M3 from the starting point S to the current position are displayed in a simulated manner following the traveling state of the vehicle.

The above configuration and operation are the same as the conventional travel route display device described at the beginning.

Therefore, in such a driving route display device, as shown in FIG. 3, due to the above-mentioned cumulative error, the current position and the driving trajectory up to that point gradually deviate from the road on the map as the car travels. Eventually, it becomes impossible to determine where on the map the car is currently traveling.

The present invention relates to such a travel route display device, and particularly includes a light pen 9 as an input device capable of externally instructing any coordinate position on the CRT screen of the display device 7, as shown in FIG. As shown in FIG.
When the M3 deviates from a road or the like on the map, before the degree of deviation increases and the current position on the map cannot be determined, point A that is considered to be the current position on the map is indicated with the light pen 9, The signal processing device 3 reads the designated position on the two-dimensional coordinates and automatically corrects the current position and the display position of the travel trajectory under its control.

Various algorithms for automatically correcting the display position regarding the current position and the travel trajectory in the signal processing device 3 are described below.

For example, in the relationship shown in FIG. 4, the current position where the mark is currently displayed is B, the corrected position specified by the light pen 9 is A, and the position previously specified by the light pen 9 and corrected is the position. When C, the previous light pen 9
The data of the indicated position is stored in the signal processing device 3, and the traveling trajectory between B and 0 is first translated in parallel so that point B comes to point A, and then the traveling trajectory that has been translated in parallel with point A as the center is is rotated so that its trajectory passes through the zero point, and the storage contents of the traveling trajectory storage device 4 are rewritten in accordance with the data of the processed traveling trajectory.

Alternatively, as a simple correction method, the traveling trajectory between B and 0 may be rotated around the 0 point until the B point reaches the A point.

In addition, in relation to the relationship shown in FIG. 5, the position A at which the current position B should be corrected and the correction position at point d on the travel trajectory are sequentially indicated using the light pen 9, and first the data of each indicated position is From there, move the traveling trajectory in parallel so that point B comes to the indicated point A that is closest to the current position B. Then, rotate the translated traveling trajectory around point A so that the trajectory passes through point D. After performing the above processing, the stored contents of the travel trajectory are rewritten.

Further, according to the present invention, it is also possible to have only the current position corrected without having to correct the display position of the travel trajectory including the current position. In that case, if the light pen 9 is used to indicate the point A that is considered to be the current position on the map when the current position B deviates from the road, the current position mark M1 is set under the control of the signal processing device 3.
Only the vehicle moves to point B, its position is corrected, and the traveling trajectory will be displayed from point B thereafter.

At this time, the past travel trajectory before point B remains off the road, but this does not pose any problem in providing guidance beyond point B. It goes without saying that only the updated display of the current position may be performed without displaying the trajectory.

Moreover, instead of using the light pen 9 as an input device, as shown in FIG. 1 on the map displayed on the screen
It is also possible to designate a point and have the signal processing device 3 determine the designated position from the output data of the touch sensor 10 at that time.

FIG. 7 shows an example of the configuration of the touch sensor 10. When one point is pressed by a finger, each output state of the pressure sensors Psi-PS4 provided at the four corners of the screen is detected by the position determination circuit 12.
reads the data and outputs the specified position data (X'+y') according to the combination. FIG. 8 shows another configuration example of the touch sensor 10. In this case, a light emitting diode array 13 and a photoelectric conversion element array 14 are provided in pairs in the X direction and Y direction of the screen, respectively. The position determination circuit 15 reads the matrix output state of each photoelectric conversion element array 14 of X and ■ when one point on the screen is designated, and outputs the designated position data (x'ty') according to the combination. It is supposed to be done.

In the present invention, in addition to calculating the current position of a moving body based on the distance sensor output and the direction sensor output as described above, other means for determining the current position of the moving body such as radio navigation or satellite navigation may be used. Needless to say, it is widely applicable.

As described above, in the driving route display device according to the present invention, a point on the map displayed on the screen can be directly indicated using an input device such as a light pen. This has the excellent advantage that the current position that has deviated from the road or the like and/or the travel trajectory up to that point can be automatically corrected.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of a driving route display device according to the present invention, Fig. 2 is a diagram showing an example of display contents in the same embodiment, and Fig. 3 shows a state in which the driving trajectory deviates from the road. 4 is a diagram showing an example of the positional relationship when correcting the traveling trajectory, FIG. 5 is a diagram showing another example of the positional relationship when correcting the traveling trajectory, and FIG. 6 is a diagram showing an example of the positional relationship when correcting the traveling trajectory. Figures 7 and 8 showing other configuration examples are diagrams showing configuration examples of a touch sensor, respectively. 1...Distance sensor 2...Direction sensor 3...Signal processing device 4...Travel trajectory storage device 5...Map information storage medium 6...Storage medium playback device 7...Display device 8 ...Operating device 9...Light pen lO
...touch sensor

Claims (2)

[Claims] 1. A driving route in which the ever-changing current position of a moving object is determined by sequential calculations, and the current position of the moving object is updated and displayed on a screen on which a map is displayed in advance according to the data of the determined current position. The display device is provided with an input device that can input position data by designating a point on the screen, and the signal processing device reads the input position data to change the current position to the designated position. A travel route display device characterized in that it takes means for correcting the travel route. 2. The ever-changing current position of a moving body is determined by sequential calculations, and the data of the determined current position is memorized and retained while the traveling trajectory of the mobile body is updated and displayed on a screen on which a map is displayed in advance. The driving route display device is provided with an input device that can input position data by specifying a point on the screen, and the signal processing device reads position data of at least two points specified by the input device. The travel route display device is characterized in that the travel route display device takes means for correcting the travel trajectory so that it comes between the two designated points.