JPS5918419A - Course guiding device - Google Patents

Abstract

PURPOSE:To eliminate the deviation between a running locus and a map, by extracting check pattern data from an image pickup tube, which converts a basic pattern, together with a map, and comparing the data with the stored basic pattern, thereby performing centering adjustment of the image pick up tube. CONSTITUTION:The outputs of a running speed detector 10 and a running angle detector 12 of a vehicle and the like are inputted to an image synthesizing circuit 19 through a coordinate data memory 17 and the like. The results are displayed on a CRT display 20 together with the map data from an image pickup tube 9. At this time, a map area 31 and a basic pattern area 32, wherein a basic pattern 33 is drawn, are provided at a specified positions of a microfilm 7, which is to become the input to the tube 9. The pattern data corresponding to the area 32 is extracted from the tube 9. The extracted data and the data of the preliminarily stored area 32 are compared in a pattern comparing part 28. In correspondence with one of the data, the centering adjustment of the tube 9 is performed by superimposing a DC on a deflection coil 30. Thus the map position on the CRT20 is corrected.

Description

[Detailed Description of the Invention] A map surface image obtained by projecting travel trajectory information calculated based on the outputs of a direction sensor and a speed sensor and a map recorded on a micro film. In a course guidance device that displays on a display map information from an image pickup tube that is converted into map information corresponding to the map surface image and output, the map on the display based on the positional shift of the micro film. The present invention relates to a course guidance device in which a travel trajectory corresponding to a map displayed on the display is accurately displayed by correcting a display position shift by adjusting the centering of the image pickup tube.

Prior to filing the present application, the applicants of the present application developed a course guiding device as shown in FIG. The course guidance device is placed, for example, in front of the driver's seat, and as shown in FIG. The driving trajectory 2 obtained based on the output is plotted on the display screen, and the map sheet 3 drawn on, for example, a transparent film is configured to be attachable to and detachable from the front of the display screen, and the map fixing means 4, fix the installed map sheet 3 and follow the above travel trajectory 2.
is extended to fit the desired road on the map.

The above-mentioned course guidance device has one major feature and advantage in that it superimposes the display screen and the map and extends the travel trajectory along the road on the map. This is a promising direction for the device. However, in the device shown in FIG. 1, for example, when the traveling trajectory 2 advances to the peripheral edge of the map on the display screen and it becomes necessary to replace it with a subsequent map sheet, or for example when entering a city area etc. When it becomes necessary to replace a map sheet that has been previously used, not only must the map sheet be replaced manually;
It is also difficult and troublesome to select a desired map sheet from among a large number of map sheets.

In order to avoid such troublesome operations, the applicants of the present application
The above-mentioned map sheet is microized as it is, that is, a desired number of maps are recorded on a micro film, and the map on the micro film is displayed on a projection screen using a blog, etc., and the map displayed on the screen is In order to directly capture the projected image of the map on the micro film using a course guidance device that displays the travel trajectory by superimposing it on the micro film, and display the captured map image on the ORT display. We are proposing a course guidance system that displays the map and the driving trajectory in a superimposed manner on the ORT display by converting the information into map information. The micro film used in these course guidance devices is loaded into a film cartridge so that it can be wound up and rewound freely, and the map can be automatically updated by switching to the desired map using a key manual (described later) or by a switching instruction signal. It is meant to be done.

FIG. 2 shows a map switching device and an image pickup tube in the above-mentioned course guidance system that displays a map using an image pickup tube. In the figure, 5 is a light source, 6 is a film cartridge, 7 is a micro fist film, 8 is a magnifying lens,
Reference numeral 9 represents an image pickup tube, and the light source 5 to the magnifying lens 8 constitute a map switching device according to the present invention.

In FIG. 2, a micro film 7 is housed in a film cartridge 6 so that it can be wound up and rewound by a pulse motor (not shown) that is controlled by a map switching instruction signal. A desired map is recorded in each frame of the micro film 7. Further, an exposure window (not shown) having an area corresponding to the frame of the micro film 7 is provided in the center of the film cartridge 6 so that the irradiated light from the light source 5 is transmitted therethrough. Therefore, the map recorded in the frame on the micro film 7 moved by the pulse motor and positioned in the exposure window is illuminated by the irradiation light from the light source 5 and further magnified by the magnifying lens 8. The image pickup tube 9 receives the map magnified by the magnifying lens 8, converts the received map surface image into digital data, and outputs it as map information corresponding to the map. In this way, the map information corresponding to the map selected by the map switching device outputted by the image pickup tube 9 is combined with travel trajectory information to be described later, and the map and travel trajectory are displayed on the display. Therefore,
When switching maps on the microfilm mentioned above, if the position of the frame on which the map is drawn shifts even slightly, the map displayed on the display will also shift (the map displayed on the display is enlarged, so the shift will tc), the relative positional relationship between the travel trajectory and the map becomes inaccurate.

In experiments conducted by the inventors of the present application, it was found that there is a limit to the feeding accuracy of the micro film in the above-mentioned map switching device.
For example, even if there is an error of about ±0.3%, if the magnification of the map displayed on the display is 10x,
The error is also magnified ten times, resulting in a deviation of approximately ±3 points, which poses a problem in that it is impossible to align the map and the travel trajectory. As a means to resolve this discrepancy between the map and the travel trajectory, mechanical fine adjustment of the position of the image pickup tube has been considered, but there is also the problem that the device becomes large and heavy. There is also a problem in that it is complicated to check the amount of positional deviation and perform alignment each time, and the operability deteriorates.

The purpose of the present invention is to solve the above-mentioned problems, and therefore, the course guidance device of the present invention provides a course guidance system based on the outputs of a direction sensor and a speed sensor mounted on a moving body. Trajectory information and map information from an imaging tube that captures a map surface image obtained by projecting a map recorded on microfilm, converts it into map information corresponding to the map surface image, and outputs it on a display. In the course guidance device, a basic pattern area in which a basic pattern for detecting a map display position shift is drawn is provided at a predetermined position in each map area of the micro film, and The pattern information in the pattern area can be saved as a basic pattern that is stored in advance.
a memory, a video signal processing unit that extracts check pattern information corresponding to the basic pattern area from map information including the basic pattern output from the image pickup tube, and a video signal processing unit that extracts check pattern information corresponding to the basic pattern area from the map information including the basic pattern output from the image pickup tube; It is characterized by comprising a pattern comparison processing section that performs comparison processing with the contents of the basic pattern memory, and is configured to perform centering adjustment of the image pickup tube based on the comparison processing result in the pattern comparison processing section. .

This will be explained below with reference to the drawings.

FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention, and FIG.
Figures (A), (B), (0) and Figure 5 Prisoner,
(Bl, (0) are explanatory diagrams for explaining the centering adjustment operation of the image pickup tube in the embodiment shown in the third figure, respectively. In the figure, reference numeral 9 is the image pickup tube, 10 is a running speed detector,
11 is a distance storage memory, 12 is a running angle detector, 13 is a θ storage memory, 14 is an OO8 converter, 15 is a SIN converter, 16 is an integrator, 17 is a coordinate data memory, 18
19 is a correction coordinate creation circuit, 19 is an image synthesis circuit, and 20 is an OR
21 is a map switching detection unit, 22 is a map switching device, 23 is a keyboard, 241d is an image pickup tube drive circuit, 25 is a video signal processing circuit, 26 is a check pattern memory, 27 is a basic pattern memory, 28 29 is a pattern comparison processing section, 29 is a position adjustment signal generation circuit, and 30 is a pattern comparison processing section.
31 represents a deflection coil, 31 represents a map area, 32 represents a basic pattern area, and 33 represents a basic pattern.

The traveling speed detector 10 outputs a pulse signal whose frequency changes in accordance with the traveling speed of the vehicle.

For example, eight pulses are output for one rotation of the wheel, and this output signal information is stored in the distance storage memory 11.

The running angle detector 12 outputs a digital signal corresponding to the running angle of the vehicle, that is, a signal indicating that, for example, if the vehicle turns 300 degrees to the right, it has turned 30 degrees.

This signal is stored in the θ storage memory 13. The data stored in the θ storage memory 13 is input to the 00S converter 14 and the SIN converter 15, and the cosine and sine are calculated from the digital signal corresponding to the angle, and the X-direction component and the Y-direction component are calculated. and input into the integrator 16. The data stored in the distance storage memory 11 is
This is the number of pulses input per unit time, and its value is proportional to the travel distance (or travel speed). This data is also input to the integrator 16 to calculate each X-direction coordinate per unit time. and the Y-direction coordinates. The X-direction coordinates and Y-direction coordinates obtained by the integrator 16 are stored in the coordinate data memory 17, converted to appropriate values by the correction coordinate creation circuit 18, and sent to the video synthesis circuit 19 as travel trajectory information. Sent. The video synthesis circuit 19 performs a process of synthesizing the travel trajectory information with map information to be described later, and causes the CRT display 20 to display a map and travel trajectory corresponding to the map information.

Next, generation of the above map information will be explained.

As described at the beginning of this specification with reference to FIG. 2, the map information is obtained by capturing an image of a map selected by the map switching device 22, which will be described later, using the image pickup tube 9 and converting it into map information. Circuit 24 and video signal processing circuit 25
The signal is sent to the video synthesis circuit 19 via. Then, in the video synthesis circuit 19 (in which the driving locus information sent from the corrected coordinate creation circuit 18 and the map information are combined, a map corresponding to the map information and the driving path are displayed on the ORT display 20). As mentioned above, the map displayed on the display 20 is micro-photographed by the image pickup tube 9.
The map on the film 7 is the basis, and therefore, the feeding control of the micro film 7 is performed when selecting a desired map from a large number of maps on the micro film 7 (the selection operation will be described later). Sometimes, the micro
If the stop position of the film 7 shifts, the display 2
Since the map displayed at 0 will also be shifted, a shift will occur in the relative positional relationship with the travel trajectory display, making it impossible to accurately display the travel trajectory.

The present invention is provided with an automatic map display correction function that allows correct map display even if the stop position of the micro film 7 deviates as described above. This function will be explained with reference to FIGS. 3, 4, and 5.

FIG. 4(A) shows an example of a map recording state on the microfilm 7 used in the present invention. Reference numeral 7 in the figure is a micro film corresponding to Fig. 2, 31 is a map area where a predetermined map of each region is drawn, and 32 is a basic pattern area. The above map areas 31 , 31 , . . .
33I
lt represents a basic pattern drawn at a predetermined position within the pattern area.

Assume that the map information output from the image pickup tube 9 described above corresponds to the map area shown in FIG. As shown in FIG. 4(B), the pattern information can be represented by "1#" for the basic pattern 33 and 0 for the other parts. The pattern information shown in Fig. 4 (B) is shown in Fig. 4 (B).
0) As shown in the illustrated table, data can be expressed in association with addresses. The basic pattern memory 27 (shown in FIG. 3) in the present invention stores in advance the contents of the table shown in FIG. 4(0). The video signal processing circuit 25 also processes the pattern area 3 from the map information sent from the image pickup tube 9 via the image pickup tube drive circuit 24.
The pattern information corresponding to 2 is extracted and stored in the check pattern memory 26.

Therefore, when the map area 31 is in a normal position, the contents of the check pattern memory 26 match the contents of the basic pattern memory 27;
If the position of the pattern area 32 is shifted, the position of the pattern area 32 is also shifted, so that the contents of the check pattern memory 26 no longer match the contents of the basic pattern memory 27.

Now, assuming that a map corresponding to the map area 31 on the micro saliva film 7 is displayed, the map area 3
The image of the basic pattern 33 existing in Figure 1 is also displayed as shown in Figure 5 (N arrow (b) 1.
The display screen of the i0RT display 20 is shown, and the image position of the basic pattern 33 when there is no shift in the map area 31 described above is indicated by an arrow (&).

In this case, the image of the basic pattern indicated by arrow (b) in the figure is, for example, 2 pixels (2 bits) to the left (-X direction) and upward (+y direction) with respect to the position of arrow (B) in the figure. Assuming that there is a shift of one pixel (one bit), the check pattern information extracted by the video signal processing circuit 25 is as shown in FIG.
It is shifted by 2 bits in the X direction and 1 bit in the +Y direction. As a result, the contents of the check pattern memory 26 correspond to the check pattern information shown in FIG. 5 (131), as shown in the table shown in FIG. By comparing the contents of the pattern memory 26 and the aforementioned basic pattern memory 27, the deviations in the X and Y directions are detected.

On the other hand, it is known that centering adjustment of the image pickup tube 9 can be made possible by superimposing a direct current on the deflection coil 30 to which an alternating current is applied as a deflection voltage.

Therefore, the position adjustment signal generation circuit 29 generates a DC voltage corresponding to the detection contents in the pattern comparison processing section 28 and applies it to the deflection coil 30 of the image pickup tube 9 via the image pickup tube drive circuit 24. As a result, the centering adjustment of the image pickup tube 9 is performed, and the map display on the display 20 described above is corrected.

In this way, as mentioned above, the micro film 7
Even if the positioning and alignment of the image pickup tube 9 is not performed correctly, the pattern comparison processing section 28 detects the positional deviation and adjusts the centering of the image pickup tube 9.
Map display correction is performed automatically. As a result, the travel trajectory on the display 20 can always be accurately displayed in correspondence with the map.

Next, the automatic map update operation in the map switching device 22 will be explained. In FIG. 3, the travel trajectory information output from the corrected coordinate generation circuit 18 is also sent to the map switching detection section 21. If the map switching detection unit 2↓, the above-mentioned correction coordinate creation circuit 1
The current position of the vehicle displayed on the display 20 based on the travel trajectory information input from the display 2
0 screen edge (or near the screen edge), and if so, it is necessary to switch to a new adjacent map. judge. Then, based on the determination result, the map number to be switched is designated and a map switching instruction signal is output to the map switching device 22. Then, the map switching device 22 switches the map based on the map switching instruction signal, and map information corresponding to the newly switched map is output from the image pickup tube 9, as shown in FIG. As explained above. Further, in this case, the map switching detection section 21 notifies the correction coordinate creation circuit 18 that the map has been switched to a new map. Based on the notification, the corrected coordinate creation circuit 18 corrects the travel trajectory information so that the current position displayed on the zero-T display 20 is correctly displayed in accordance with the new map.

In this way, the traveling locus information output from the corrected coordinate creation circuit 18 and the map information output from the image pickup tube 9 via the image pickup tube drive circuit 24 are synthesized in the image synthesis circuit 19, and the ORT The desired map and the travel trajectory associated with the map are displayed on the display 2α.

In the present invention, the map switching operation in the map switching device 22 can also be performed manually using keys from the keyboard 23. In other words, although automatic map updating while driving is already explained, when the driver wishes to display a map of the departure point area before starting the journey, or an enlarged map, for example, When displaying a map to be displayed, a map switching instruction signal is sent to the map switching device 22 via the map switching detection section 21 by manual key input from the keyboard 23, and the map can be switched to the desired map.

As explained above, according to the present invention, it is possible to automatically eliminate the discrepancy in the relative positional relationship between the driving trajectory displayed on the display and the map, so that accurate course guidance can be provided and the map can be automatically updated. Since it is also possible to perform the following operations, it is possible to provide a course guiding device with high operability.

[Brief explanation of the drawing]

Figure 1 is an external view of a conventional example of a course guidance device;
The figure is an explanatory diagram of the map switching device and image pickup tube used in the present invention, FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. Figures (A), (B), and (01 are explanatory views for explaining the centering adjustment operation of the image pickup tube in the embodiment shown in Figure 3, respectively. In the figures, 5 is a light source, 6 is a film cartridge, and 7 is a is micro film, 8 is magnifying lens, 9Vi image pickup tube,
10 is a running speed detector, 11 is a memory for storing distance, 12
is a running angle detector, 13 is a memory for storing θ, and 14 is a CO8
Converter, 15 is a SIN converter, 6 is an integrator, 17 is a coordinate data memory, 18 is a correction coordinate creation circuit, 19 is a video synthesis circuit, 20 is a CRT display, 21 is a map switching detection unit, 22 is a map switching device, 23 is a keyboard, 2
4 is an image pickup tube drive circuit, 25 is a video signal processing circuit, 2
6 is the check pattern e mesori, 27 is the basic pattern.
28 is a memory, 28 is a pattern comparison processing unit, 29 is a position adjustment signal generation circuit, 30 is a deflection coil, 31 is a map area, 3
2 represents a basic pattern area, and 33 represents a basic pattern. Patent applicant Alps Electric Co., Ltd.

Claims (1)

[Claims] Travel trajectory information calculated based on the outputs of the direction sensor and speed sensor mounted on the moving body and the map surface image obtained by projecting the map recorded on the micro film are captured and the map surface is In a course guidance device that displays on a display map information from an imaging tube that is converted into map information corresponding to an image and output, a map is displayed at a predetermined position in each map area of the micro film. A basic pattern area is provided in which a basic pattern for detecting display position shift is drawn, and a basic pattern number memory is stored in advance with pattern information of the basic pattern area, and includes the basic pattern output from the image pickup tube. a video signal processing unit that extracts check pattern information corresponding to the basic pattern area from the map information; and a pattern comparison unit that performs a comparison process between the check pattern information extracted in the video signal processing unit and the contents of the basic pattern memory. A course guiding device comprising a processing section and configured to perform centering adjustment of the image pickup tube based on a comparison processing result in the pattern comparison processing section.