JPS58186789A - Running locus display - 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 trajectory display device for displaying the travel trajectory of a vehicle such as an automobile on a display such as a cathode ray tube display.

This type of conventional device e has a mileage detector, a direction detector,
Equipped with a signal processing circuit using a microcomputer, etc., and a cathode ray tube display device, the current position and travel trajectory of the vehicle can be displayed on the display screen of the cathode ray tube, and the route taken by the vehicle can be easily determined even in areas where roads are unfamiliar. !You can show the driver whether you are driving with one.

By the way, in such conventional devices, in order to contrast the mark that displays the current location with the map, for example, a transparent sheet with the map drawn on it is placed on the screen of the cathode ray tube, and the above-mentioned current location mark is placed on the attached It is necessary to use an operation switch or the like to match the current position on the map, and this operation is relatively troublesome, and there are drawbacks such as the need for a single-use transparent map.

1. When the display point representing the current position reaches one end of the display screen, it is replaced with another consecutive transparent map, and the previous travel trajectory is erased using the operation switch, and the current position is displayed. There was a drawback in that a procedure was required to match the displayed display point with the current position on the replacement map.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and it is possible to align the reference points with a simple operation, and the display point representing the current position reaches one end of one screen of the display device. An object of the present invention is to provide a travel trajectory display device that can pull back the display point representing the current position # from the edge position of the display screen toward the center by changing the scale ratio on the screen of the display device. It is said that

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, (1) is a travel distance detector which generates a pulse train signal in synchronization with the rotation of a wheel using, for example, an electromagnetic pickup. Since the pulse interval of this pulse train signal is inversely proportional to the wheel speed, m may be considered as a traveling speed detector. The number of pulses within a minute time indicates the distance traveled within that time. (2) is, for example, a direction detector that detects the vehicle's traveling direction using a geomagnetic sensor, and (3) is a cathode ray tube display, the display surface of which is shown in Figure 1. (4a) is the Y axis, (4b) is Y
Axis, the image of the display surface displays position points with respect to the X-Y orthogonal axes. Further, the Y-axis (4a) and the Y-axis (4b) are provided with distance scales as shown in the figure. (5) represents the origin of the coordinate axes, that is, x=o, y=o. (6) is the traveling trajectory, (7
) is the current position mark, (8) is the processing circuit, (9) is II
It's the upper setting switch. The input from the processing circuit (8) to the display is a digital number representing the Y-axis and the distance in the Y-axis direction, and the unit of this digital number is what length is displayed on the display surface of the display (3). The numerical value indicating whether the image is displayed is called a scale ratio, and the dimensions of the scales on the Y-axis (4a) and Y-axis (4b) are determined by the scale ratio. The Y-axis (4aL), the method of displaying the Y-axis (4b) and its scale, and the method of displaying the current position mark (7), which is a small hollow circle in the example of Fig. 1, are well known and will be explained below. omitted.

Figure 2 is a block diagram showing the main configuration of the processing + IT path (8), where (81) is a multiplier, (82) is an X-axis accumulator, (83) is a Y-axis accumulator, and (84) is an X-axis accumulator. Memory, (85) is Y-axis memory, (86), (87), (
8B) and (89) are comparators, tIO, and (11) respectively.
are respectively OR gates, α2 is a scale change signal input terminal,
03 is a relay, and 0 is an indicator light. ds is the distance traveled within a minute time detected by the distance detector +11, and θ is the output of the direction detector (2).

The operation of the apparatus of this invention will be explained below. Multiplier (81)
inputs da and θ and dX = da cogθ and d
Output Y = ds sinθ. It is assumed that dX and dY are the respective components of the traveling distance da in the X-axis direction and the Y-axis direction within a minute time, and are output in the form of digital signals. Y-axis and Y-axis accumulator (82), (83
) is dX, dY (1@ is accumulated and X. = /dX
, outputs the value of Yo=/dY. Therefore (Xo
, Yo) is the reference point on the X-Y coordinate axis (explained later)
Shows the current position of the vehicle with the origin as the origin. Xo, Yo is
For example, if it is represented as an 8-bit binary number, its value changes as a function of time. X. , Y-axis and Y-axis memo IJ (84) to remember past values of Yo.
(85) is provided. If Xo and Yo are each 8-bit binary numbers, memo I+ (84), (85)
are shift registers 8 with n pintos (nVi integer), respectively.
Consists of individual pieces. A new X every clock period T.

. The value of Yo is stored in a memory (
84) and (85), and the memory (8
4).

The data that previously existed in (85) is shifted to the right one bit at a time. In this way, the accumulator (8
2"l, the output (Xo, Yo) of (83) is the current position of the vehicle, and the memory (84) consisting of a shift register.
), the contents of (s5) in order from the left end (X,.Yl)
.

(X2, Y2), (X3.Y:l)..., these indicate the past positions of the vehicle in chronological order. However, both positions ilj before time nT are shifted out from the shift register. -Superior's (X
,Y).

0 (X, Y), (X, Y), (X,
Y)... II 2
2 3
It is easy to input 3 data and display, for example, a figure as shown in FIG. 1 on the display surface of the cathode ray tube display (3). In this case, assume that the scale of the display on the display (3) is determined so that the LSB (least significant bit) of the input digital number corresponds to the length ul on the display (3).

Next, when the reset switch (9) is operated, the contents of the accumulators (82) and (83) and the memory (84),
The contents of (85) all become zero, and the display of the current position and travel trajectory is started using that point as the reference point (ie, point Xo-Yo-0). 17 Therefore, it is easy for the user to fully operate the reset switch (9) at a reference point on the map and display that point as a reference point on the display screen, which allows the map and display (3) to be displayed as a reference point. ) can be easily compared with the figure above.

Next is X. My father is Y. The value of is displayed on the display (3) as shown in Figure 3.
) may reach the display screen limit. The case of FIG. 3 shows a case where the current position mark (7) has reached its rightmost limit, and in this case, a logic "1" signal is output from the comparator (87). Similarly, when the left limit, bottom limit, and top limit are reached, the comparators (86) and (88) are used, respectively.
, A logic "1" signal is output from (89) and output to the display (3) via the OR gate (11, Ql),
The scale on the display (3) is controlled so that the scale in which the LSB corresponds to the length of ul to the scale in which the LSB corresponds to the length of u2 (u2<ul). The result display (3
) on the display screen becomes as shown in FIG. 4, and the current position mark (7) moves inward from the right end of the display screen.

Similar control is performed when a logic "1" signal is manually applied to the terminal 0 input.

Whether the worn scale is U or U2 is determined by the X axis (4a),
Although it is shown by the distance scale on the Y axis (4b), the case where the scale is u2 can be displayed by lighting the indicator light tS (il) via a relay.When the display is shown in Fig. 4 If you operate the reset switch (9),
=Yo-0 becomes OR gate (IQ output is logic “0”)
As long as there is no logic "1" signal at the terminal O2, the output of the OR gate 0σ will be logic "0" and the scale will be ul. It is also easy to reset the signal logic of the terminal α2 to “0” using the reset switch (9). It is also easy to display the scale ratio on the display surface of the indicator (3) in place of the indicator light 04 by an appropriate method.

In the above description, the configuration of the processing circuit (8) has been represented by the hardware shown in FIG. 2 for convenience of explanation, but it is obvious that similar data processing can be performed with a microcomputer.

As described above, according to the present invention, it is possible to easily compare figures on a display with a map through simple operations.
Moreover, by appropriately selecting the scale ratio, the screen of the display device can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an embodiment of the present invention, FIG. 2 is a block diagram showing the main structure of the process shown in FIG. 1, and FIGS. 3 and 4 are display examples of the present invention. FIG. m・-・Distance detector, (2)・・Direction detector, (
3) Display, (4a) - X axis, (4b) Y axis, (51 - Origin, (6) Travel trajectory, (7)
・・Current equipment mark, (81) ・・rice calculator, (82)
...X-axis accumulator, (83)...Y-axis accumulator, (84)...X-axis memory, (85)...
Yell memory, (86), (87), (88) I (8
9)...Comparators, (10, +1, respectively), CIL-scale change signal input terminal, 04...
·Indicator light. Note that the same reference numerals in the figures indicate the same parts. Shinto Kazuno - Figure 1 Figure 3 Figure 4 Procedural amendment (voluntary) 29 Name of the invention Travel trajectory display device 3, relationship to the case of the person making the amendment Patent applicant address Marunouchi, Chiyoda-ku, Tokyo 2-2-3 Name (601) Mitsubishi Electric Corporation Representative Jin Katayama Department 5, Claims column of the specification subject to amendment and Detailed description of the invention column 6 of the specification, Amendment Contents (1) The scope of claims in the specification is corrected as shown in the attached appendix. (2) In the specification, page 4, line 18 to addition line, the statement "The pulse interval...indicates the traveling distance of 11t" is corrected to "The number of pulses indicates the traveling distance." . (3) In the same book, page 6, line 6, the phrase ``distance traveled within minute time'' is corrected to ``minute distance traveled.'' (4) In the same book, page 6, lines 10 to 11, the phrase ``distance traveled within a minute time'' is corrected to ``minute distance traveled.'' (5) Delete "every clock cycle T" in the fourth line of page 7 of the same book. (6) In the 6th line of page 7 of the same book, the phrase ``input,'' is corrected to ``every time it is input.'' (7) Same book, page 7, line 14 of the vehicle before time rnT (
2) Correct the phrase "The location is" to read "Older vehicle locations are sequential." 7. List of attached documents (1) Attachment Revised scope of patent claims At least one Attachment 2, Claims (1) Mileage detector for detecting the distance traveled by the vehicle and direction for detecting the traveling direction of the vehicle a detector, and an X-axis for inputting the outputs of the azimuth detector and the travel distance detector, decomposing the travel distance into azimuth components of the X-axis and Y-axis of a rectangular table, and integrating the decomposed azimuth components, respectively. an accumulator, a Y-axis accumulator, and an X-axis memory and a Y-axis memory that respectively store the contents of the Y-axis accumulator;
By inputting a reset signal, the above X-axis accumulator, Y-axis accumulator, X-axis memory, and Y-axis memo IJ (7
) a means for resetting each content to zero; a display capable of displaying two-dimensional coordinates; and inputting the contents of the X-axis accumulator, Y-axis accumulator, X-axis memory, and Y-axis memory to the display and resetting the above. means for displaying the current position and trajectory of the vehicle on a predetermined scale on an X-Y rectangular coordinate having the origin at the vehicle position at the time when the vehicle is located; and in this display, the current position of the vehicle is displayed on the display A travel locus display device comprising display scale control means for changing the display scale of the display to a scale that makes the image smaller than the predetermined scale when the limit of a predetermined range of the surface is reached. (2) The travel trajectory display device according to claim 1, wherein the display scale side ftLII means also includes means for changing the display scale by inputting a signal from the outside. (3) The travel trajectory display device according to claim 1, wherein the display scale control means includes means for displaying a distance scale on the coordinate axes. (4) The mileage display device according to claim 1, wherein the display scale control means includes display means for displaying the type of scale selected I7.

Claims (4)

[Claims] (1) A mileage detector that detects the mileage of the vehicle, a direction detector that detects the direction of travel of the vehicle, and the outputs of this direction detector and the mileage detector are input to drive the above-mentioned travel within a minute time. An X-axis accumulator and a Y-axis accumulator that decompose the distance lIf[I into mutually orthogonal X-axis and Y-axis azimuth components and integrate the decomposed azimuth components, respectively, and the X-axis accumulator and Y-axis accumulator for each predetermined time. an X-axis memory and a Y-axis memory respectively storing the contents of the above-mentioned and a display capable of displaying two-dimensional coordinates, and inputting the contents of the X-axis accumulator, Y@accumulator, X-axis memory, and Y-axis memo 11 to this display to display the vehicle position at the time when the above reset was performed. means for displaying the current position and trajectory of the vehicle at a predetermined scale on an X-Y rectangular coordinate with the origin as the origin;
In this display, when the current position of the vehicle reaches the limit of a predetermined range of the display surface of the display, display scale control means changes the display scale of the display to a scale that makes the image smaller than the predetermined scale. A travel trajectory display device equipped with. (2) The travel trajectory display device according to claim 1, wherein the display scale control means also includes means for changing the display scale by inputting a signal from the outside. (3) The travel trajectory display device #i according to claim 1, wherein the display scale control means includes means for displaying a scale on the coordinate axis. (4) The mileage detector W according to claim 1, wherein the display scale side @1 means includes display means for displaying the type of selected scale.