JPS58201021A - Device for displaying travelling position of vehicle - Google Patents

Abstract

PURPOSE:To watch a display easily and operate easily, by processing output signals from a travelling speed detector and a travelling angle detector, displaying its travelling trace on a CRT and projecting a map from a map switching device to superpose the dislay on the CRT. CONSTITUTION:A travelling distance is found from the output of the travelling speed detector 20, stored in a distance storing memory 21 and applied to an integrator 26 and the output of the travelling angle detector 22 is stored in a theta storing memory 23 and applied to the integrator 26 through a COS converter 24 and a SIN converter 25. In addition, travelling coordinates are fund and displayed on a CRT through a coordinate data memory 27 and a compensation coordinate forming circuit 32. On the basis of an indication from a keyboard 33, a map is projected on a projection screen 8 by a map switching detecting part 28 and a map switching device 5 and superposed to the display of the CRT and the map switching detecting part 28 detects the necessity of switching maps automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a driving position display device for a vehicle, in particular, is equipped with a direction sensor and a speed sensor, and displays, for example, the driving trajectory of a passenger car on a display, and also superimposes a map on the display. In a vehicle driving position display device that displays the driving position in association with a map, for example, when the current driving position of the vehicle comes to the edge of the display screen and the map changes, or when the driver's keyboard When an operation causes a conversion such as enlarging/reducing the above map, the display of the current driving position will now be automatically converted to the correct position in accordance with the newly switched map. At the same time, the driving position display device for the vehicle is configured to select and display, for example, any of the top, bottom, left, and right maps connected to the above-mentioned map currently projected on the display screen at any time by the driver's keyboard operation. The OM vehicle driving position display device for which the device has been developed is placed, for example, in front of the driver's seat, has a CRT display 1, and has a direction sensor (not shown) and a speed sensor (not shown) mounted separately. The vehicle is configured to plot (trace) a travel trajectory 2 obtained based on detection signals from the CRT display 1 on the screen of the CRT display 1. On the other hand, for example, a map sheet 3 drawn on a transparent film is attached to the front of the screen of the CRT display 1.
It is configured to be removable and fixed by map fixing means 4, and as the car moves, a bright spot indicating the current position of the car moves along the road etc. printed on the map sheet 3, and as the car moves, the current driving position is moved. The position is displayed on the map sheet 3 every moment.

In the conventional device as described above, the map sheet is held immovably on the display surface of the CRT display by appropriate means, so that the bright spot of the current driving position comes to the end of the map sheet, and a new continuous map sheet is displayed. When it becomes necessary to replace the map sheet with the map sheet, or when it becomes necessary to replace it with an enlarged map sheet after entering a city area, the map sheet must be replaced manually. Avoid such extremely troublesome operations. For this purpose, the applicant of the present application has proposed, for example, preparing a plurality of consecutive maps and their enlarged maps on microfilm so that the maps can be switched automatically.

However, even if the map is automatically replaced, the actual driving position displayed on the CRT display remains the same, and the driver can reposition it by operating a bright spot drive operation switch, for example. If you have to do this, it is not only extremely troublesome and error-prone, but doing so while driving is dangerous as it makes you careless and requires you to stop and map the new map to the bright spot where you are driving. This is inconvenient because it has to happen.

The present invention aims to solve this problem, and provides a vehicle driving position display in which when the map is switched, the bright spot of the current driving position is automatically converted and displayed correctly in accordance with the new map. The purpose is to provide equipment. This will be explained below with reference to the drawings.

Before explaining the present invention, an embodiment of a map switching mechanism will be described. Figure 2 is an explanatory diagram of the map projection method.
FIG. 3 shows an explanatory diagram of an embodiment of the map switching device.

In the figure, 5 is a map switching device, 6 is a reflector, 7 is a luminous flux for glodivision, 8 is a projection screen, 9U CRT display, 10 is a light source for glodiector, 11 is a projector luminous flux guide, and 12 is a microfilm cartridge loaded. 13 is a cartridge drive unit, 14 is a drive motor, 15 is a drive gear, 16 is a microfilm, 1.
7 is a magnifying lens 0 The map switching mechanism used in implementing the present invention is as follows:
Although not limited to the method described below, it can be realized, for example, by a method as shown in FIG.

That is, the map displayed on the CRT display 9 that corresponds to the travel trajectory is not created by a map sheet made of transparent film, but by the glossection light beam 7 projected from the map switching device 5 passing through the reflection plate 6. , is displayed by being projected onto the projection screen 8 provided in front of the display screen of the CRT display 9.

The map switching device fiii5 has a configuration as shown in FIG. 3, for example. The map is stored in advance on a plurality of microfilms 16 for areas within a predetermined range and converted into cartridges. The microfilm 16 cartridge is loaded into the microfilm cartridge loading section 12 and driven by a cartridge drive section 13 provided with a drive morph 14 and a drive gear 15, so that a desired map is copied. The selected microfilm 16 is then selected. The light from the projector light source 10 is directed onto the microfilm 16 through the projector light guide 1.
1, a desired map pattern can be obtained as the projection light beam 7. Map switching is automatically performed by rotating the drive gear 15 clockwise or counterclockwise by the drive motor 14 for the required time.

FIG. 4 is a block diagram of the configuration of an embodiment of the present invention, and FIGS. 5 to 8 are explanatory diagrams for explaining the operation of the correction coordinate creation circuit.

In the figure, numerals 5, 8, and 9 correspond to those in Fig. 2, 2° is a running speed detection section, 21 is a distance storage memory, 22 is a running angle detector, 23 is a θ storage memory, and 24 is a COS conversion unit. vessel, 25
USIN converter, 26 is an integrator, 27 is a coordinate data memory, 28 is a map switching detection section, 29 is a coordinate comparison circuit, 30
31 is a map number selection circuit, 31 is a map number discrimination circuit, 32 is a correction coordinate creation circuit, and 33 is a keyboard t-.

The traveling speed detector 20 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 21.

The running angle detector 22 outputs a digital signal corresponding to the running angle of the vehicle, ie, a signal indicating that, for example, if the vehicle has turned 30 times to the right, this signal is stored in the θ storage memory 23. The data stored in the θ storage memory 23 is
The signal is input to a cos converter 24 and a SIN converter 25, and a cosine and a sine are calculated from the digital signal corresponding to the angle, decomposed into an X-direction component and a Y-direction component, and input to an integrator 26. The data stored in the distance storage memory 21 is the number of pulses input per unit time, and its value is proportional to the traveling distance (or traveling speed), and this data is also input to the integrator 26. The X-direction coordinate and the Y-direction coordinate are inputted and determined for each unit time.

The X-direction coordinate and Y-direction coordinate obtained by the integrator 26 are stored in the coordinate data memory 27, converted to appropriate values by the correction coordinate creation circuit 32, and inputted to the CRT display 9 to determine the bright spot position. 0 Of course, a bright spot indicating the current position will be displayed on the screen of the CRT display 9.
Needless to say, the bright spot indicating the current position It is made to coincide with the position of the vehicle on the map selected by the map switching device 5 and projected on the projection screen 8.

The X direction coordinate and Y coordinate stored in the coordinate data memory 27
The direction coordinates are converted by the corrected coordinate creation circuit 32, and the results of this conversion are also input to the coordinate comparison circuit 29 of the map switching detection section 28. The coordinate comparison circuit 29 determines whether the input coordinate values indicating the current position have reached the screen edge of the CRT display 9. In other words, the input coordinate values and C
A comparison is made between the coordinate values of the screen edge (or the vicinity of the screen edge) of the RT display 9 in the X direction and the Y direction. As a result of the comparison, if it is recognized that the current driving position has reached the edge of the screen, it is necessary to switch to a new adjacent map. Along with the information, the map number selection circuit 30 is notified that the map should be switched.

Further, the correction coordinate creation circuit 32 is also notified that the map has been switched.

The map number selection circuit 30 selects a map number that is the identification number of a new map based on the notification information, and issues a switching instruction signal to the map switching device 5. The map switching device 5I/'i, for example, the frame of the microfilm 16 having the map number designated by the drive motor 14 shown in FIG. 3 is pulled out and switched to a new map.

On the other hand, as will be described in detail later, the corrected coordinate creation circuit 32 re-corrects the coordinates so that the bright spot of the current position is displayed correctly in accordance with the new map. Thereafter, the bright spot position on the screen is determined based on this new correction value.

The map can also be switched by a driver's instruction from the keyboard 33, for example. When the driver issues an instruction using the keyboard 33, for example, to enlarge or reduce the map, or at any given time, any direction to the top, bottom, left, or right of the map connected to the map currently projected on the display may be displayed. When an instruction is given, the instruction to that effect is input to the map switching device 5, and the map switching device 5 selects and projects the microfilm of the instructed map.

The map number of the new map that has been switched is input to the map number discrimination circuit 31 of the map switch detection section 28.This map number is automatically determined by optical processing of the number or identification pattern displayed on the microfilm. It may also be possible to detect and recognize the information.

The map number discrimination circuit 31 notifies the correction coordinate creation circuit 32 that a new map has been switched.The zero correction coordinate creation circuit 32 uses the notification to correct the coordinates as described later, and to update the current driving position to the new one. Note that during this time, the driving trajectory will not be displayed.

Correction of coordinates due to map switching as the car moves is performed, for example, as described below. For example, as shown in the fifth doctor's drawing, map EO3 is compared to adjacent maps E02, EO4,
DO3, F'03 and the edges of the map are made to partially overlap by a predetermined width.0 In Figure 5 (8), the areas with the same pattern of hidden lines map the same area. As shown in FIG. 5(B), the driving position 34 of the vehicle is, for example, at the edge of the map EO3 associated with the CRT display 9 (for example, at the center of the overlapping portion of the adjacent maps DO3a). ), it is detected by the map switching detection section 28 as explained using FIG.
The map switching device 5 also automatically corrects and displays the zero travel position 34, which is to be switched to a new map DO3 as shown in FIG. 5 (0).

This correction is performed by the correction coordinate creation circuit 32 as follows. For example, the width of the overlapping part of adjacent maps is 2t1 in the X direction (horizontal direction) and 2t1 in the Y direction (vertical direction).
Assume that there are only 2t, 0. As shown in Figure 5 (2), the lower left corner of the map is taken as the origin, and the X coordinate of the right edge of the map is 1, and the X coordinate of the top edge of the map is 1. In the XX coordinate system, (1) When the running position reaches the point α, that is, the coordinates (') + ym), the map EO3 is switched to the map EO2, and the running position on the map EO2 has the new coordinates (Ll 'I .

ym) is corrected and displayed.

(2) When the running position reaches the point b1, that is, the coordinates (xm, Z,), the map EO3 is switched to the map F'03, and the running position on the map FO3 is changed to the new coordinates ("mlLg-
Z, ) is corrected and displayed.

(3) The running position is point C1, that is, the coordinates (Ls's+yn
), map EO3 is switched to map EO4,
The driving position on map EO4 is the new coordinates (tt+yn
) is corrected and displayed as 0 (4) When the driving position reaches the point d1, that is, the coordinates (Ga, L*-Ls), the map EO3 is switched to the map DO3, and the driving position on the map DO3 is , the new coordinates are corrected and displayed as (3:n+Z) 0 As the map changes as described above, the coordinates of the driving position are automatically corrected, so the driver can The correction when the map is switched in response to an instruction to enlarge or reduce the map from the zero-order keyboard 33 will be described, which allows the current position to be correctly recognized without any operation on the map. For example, maps are copied onto microfilm 16, and a large number of maps with different scales are arranged as shown in the illustration of the sixth doctor.Maps of the same area with different scales are associated with each other by, for example, map numbers. For example, in Fig. 6(B), maps 010.020.030, . The area mapped by map 010 is the same as the area covered by four maps, map 011, map 012, map 013, and map 014. (4) Assume that the vehicle is traveling at the current position 34 as shown in the figure η At this point, for example, if an instruction is given to double the enlargement, the map is switched by the map switching device 5, and the map shown in FIG. ) Map 012 is selected and displayed as shown in Figure 7 (B) On the other hand, when map 012 is used and an instruction is given to reduce it by half, the map changes from map 012 shown in Figure 7(B). The map will be switched to the seventh doctor illustrated map 010.

Coordinate correction in the case of enlargement is performed by the corrected coordinate creation circuit 32 as follows. As shown by the eighth doctor, the full screen size in the X direction is L□, the full screen size in the Y direction is , and the coordinates of the current position 34 before enlargement are ("+, y
+). New coordinates of the current position 34 when enlarged by N times in the X direction and M times in the Y direction (
"x, ys) is derived from the following equation.

x, = mod(x,/rL) X N'1. =
-0d(L/m) X M However, rL=L,/N
, and m = L, 7M. In the above equation, nod(
α/b) indicates the remainder when α is divided by b. Coordinate correction in the case of reduction is performed by the corrected coordinate creation circuit 32 as follows. As shown in FIG. 8), it is assumed that the coordinates of the current position 34 before reduction are (c, y1) sp, and that the current position 34 is reduced to 1/N in the X direction and 1/M in the Y direction. Coordinates of current position 34 on the new map (
”*, L) is derived from the following formula.

In the above equation, α and β are constants that indicate the location of the area mapped in the original map in the new map. For example, when reducing the area by half in the X and Y directions, q As shown, α is 2 and β is also 2 in the illustrated ρυ.

As described above, when map enlargement or reduction is detected by the map switching detection unit 28, the coordinates of the current position are automatically corrected by the correction coordinate creation circuit 32 in response to a notification from the map number discrimination circuit 31. , the driver does not need to readjust the bright spot indicating the current driving position.

As explained above, according to the present invention, when the map changes as the car moves or according to an instruction from the driver,
The current driving position will be automatically converted and displayed to the correct position in accordance with the new map.
The driver no longer needs to perform troublesome operations such as positioning using the Terunaga drive operation switch, for example. Further, regardless of the movement of the vehicle, the desired map can be automatically switched and displayed with a simple operation in response to an instruction from the driver.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional vehicle driving position display device;
The figure is an explanatory diagram of the map projection method, Figure 3 is an explanatory diagram of an embodiment of the map switching device, Figure 4 is a block diagram of the configuration of an embodiment of the present invention, and Figures 5 to 8 are corrected coordinate creation An explanatory diagram for explaining the operation of the circuit is shown. In the figure, 5 is a map switching device, 6 is a reflector, 7 is a projection light beam, 8 is a projection screen, 9U CRT display, 10 is a light source for a projector, and 11 is a light source for a projector. Projector light beam guide, 12 is a microfilm cartridge loading section, 13 is a cartridge drive section, 14 is a drive motor, 15 is a drive gear, 16 is a microfilm, 17
20 is a magnifying lens, 20 is a running speed detector, 21 is a distance storage memory, 22 is a running angle detector, 23 is a θ storage memory, 24 is a COS converter, 25 is a SIN converter, 26 is an integrator, 27 28 is a coordinate data memory, 28 is a map switching detection section, 29 is a coordinate comparison circuit, 30 is a map number selection circuit, 31
32 represents a map number discrimination circuit, 32 a correction coordinate creation circuit, and 33 a keyboard. Patent Applicant Alps Electric Co., Ltd. Agent Patent Attorney Mori 1) Hiroshi (3 others) Japanese Patent Application Publication No. 1983
-201021 (6) f3me 1 ・ □ " Sai2 yen γ) Go 11, ゛'/ Okikochi Shichishugo,. L4 corner ml Isato each 22 21 θ Katsut = + - 1, m
23 meri
1st digit (8th digit)
SIN 254il Roto 11 JP-A-58-201021 (7) ll''-CI211

Claims (1)

[Claims] A display is equipped with a direction sensor and a speed sensor and displays the entire traveling trajectory of the vehicle based on the respective outputs of the direction sensor and speed exposure sensor, and a map is superimposed on the traveling trajectory on the display. In a vehicle traveling position display device configured to match the map and display the traveling position of the vehicle in association with the map,
A map switching device that switches the map in response to a switching instruction signal or a switching instruction command from the keyboard, and a map switching device that switches the map due to a switching instruction command from the keyboard or a map switching device that switches the map due to a switching instruction command from the keyboard or when the coordinate value of the current driving position reaches a predetermined value. A map switching detection section that detects switching; and a correction coordinate creation circuit that corrects the coordinates of the vehicle's traveling position on the display to correspond to the newly switched map based on the output content from the map switching detection section. The driving position display on the display is automatically switched in response to the map switching, and the currently displayed map can be changed at any time by a switching command from the keyboard. A driving position display device for a vehicle, characterized in that it is possible to select and display any of the top, bottom, left, and right maps.