JPS5870126A - Retrieving method for information on trveling on road - Google Patents

Abstract

PURPOSE:To read out and display the adjacent maps in traveling directions automatically despite overstepping from the map now displayed and to display the traveling loci continuously by displaying the traveling loci in conformity with the traveling of a vehicle. CONSTITUTION:The number of the map displayed on a display device is assumed to be the mn-th map. The current position of a vehicle is indicated on the map by (x0, y0) by dividing the same to 256 dots horizontally and 192 dots vertically. According to the movement of the vehicle, the extent DELTAl of movement in a unit time is determined from a speed sensor 4, and the data theta on the advancing bearings of the vehicle is determined from a bearing sensor 5. The extents (DELTAx, DELTAy) of movement in the direction x and the direction y are perated by an information processing circuit 2 and from these extents, (x0+DELTAx, y0+DELTAy) are set as the new current position (x0, y0). Thereafter whether the new current position is in a displayed range or not is operated in the circuit 2, and when the x0 is 256, the address of the displayed map is made m+1 and this address is set at the displayed map number <m, n>. At the same time a magnetic tape reproducer 3 is controlled to move the position of a cassette tape 7, by which the new map mn is read out and is displayed on the display device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road travel information retrieval method that facilitates map retrieval in a system that displays the trajectory of a moving object such as an automobile (hereinafter referred to as a vehicle) on a map.

Conventionally, systems for displaying the trajectory of a vehicle on a map displayed the trajectory on a cathode ray tube screen, and overlaid a map printed on a transparent film to display the trajectory and current location. . However, this method is very time-consuming as it requires manually selecting the necessary map from an atlas covering all of Japan, aligning and attaching it to the cathode ray tube screen so that the route of the train is overlaid on the map.

The present invention was invented to eliminate the above-mentioned drawbacks. Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 is a block diagram showing the basic configuration of a road driving information presentation system according to the present invention. In the figure, 1 is a keyboard that the driver uses to retrieve map information;
3 is an information processing circuit for displaying digital information; 3 is a magnetic tape playback device for playing a cassette tape made by recording map information on magnetic tape; 4 is a speed sensor for detecting the running speed of the vehicle; 5 is a speed sensor for detecting the running speed of the vehicle; This is a direction sensor that detects the direction of travel of the vehicle. Items 1 to 6 above are mounted on a vehicle. FIG. 2 is a diagram showing an example of a recording arrangement pattern of information recorded on the cassette tape 7 used in FIG.
In the track 8, one signal group 10 is composed of a pilot signal 11- having a constant frequency f1, followed by an information signal 12 having a frequency sufficiently higher than the constant frequency f1. The constant frequency f of the pilot signal 11 is set to be as low as, for example, 75 Hz, and the frequency of the information signal is selected to be sufficiently higher than the product of the low speed to high speed speed ratio n of tape running and the frequency f of the pilot signal. It is. The information signal 12 is a data identification signal 13. Menu data signal 14. Program data signal 16. Map data signal 17. It includes an end signal 16 and the like. The data identification signal 13 is a signal that instructs how to process the contents of the data.

Use a specific code signal. and menu data signal 1
4. Program data signal 16. It is recorded before the map data signal 17. The end signal 15 is a signal indicating that the above-mentioned data signal has ended, and is recorded at the end of the above-mentioned data. The menu data signal 14 is assigned the data number of each map as shown in FIG. 3, and is recorded as a code signal.

A pilot signal 11 is recorded before the data so that the menu data can be selected when an instruction to display menu data is received from the keyboard 1 shown in FIG. In FIG. 2, numeral 9 indicates a second track, where an audio signal 18 relating to running information of the t-branch vehicle is recorded.

Figure 3 shows how the map is divided. For example, the Tohoku region is divided into Oku-Tohoku A and Tohoku-Tohoku B, and each is recorded as map data on a cassette tape roll.

If we assume that one of these areas, for example Southeast B, is to be recorded by dividing it into 100 parts, it will be divided into 10 parts horizontally.

Divide into 10 vertically and assign numbers to the matri noks.

As can be seen from Figure 3, arbitrarily taken map data, for example, the map data on the north side of map data number 15 is map data with number 06, which is obtained by subtracting 1 from the two-digit number, and the map data on the east side is The number is 1, which is a 1-digit number added by 1.
By dividing the map in this way and sequentially recording numbers 00 to 99 in the tape running direction, the information processing circuit 2 can display the map by simply inputting the north map on the keyboard 1. You can read the map number for the north side by simply subtracting 10 from the map data number. Note that it is also possible to reverse the horizontal and vertical directions. Also, the side is 10
The above relationship is maintained even if an arbitrary vertical division method is used. They can be displayed on the map in a matrix in the numerical order shown in FIG. 3 and used as a menu.

FIG. 4 is a block diagram showing the functions of a magnetic tape reproducing device 3, which is an example of an information reproducing device used in the present invention. This has the function of identifying commands from the information processing circuit 2 to run the cassette tape 7 at high speed, low speed forward running, highway running, and stopping, and automatically control the running state of the magnetic tape. It is. Furthermore, it has a magnetic head 27 for reading recorded signals from the cassette tape 7, and has a function of reading signals even when the tape is running at low speed or high speed forward or reverse.

The bandpass filter 19 is for extracting the frequency of the first half nfl from the pilot signal read out during high-speed forward and reverse running, and has the characteristics shown by A in FIG. 6. The bandpass filter 20 similarly has characteristics as shown by B in FIG. 6, and is used to extract signals of 12 or more frequencies when the vehicle is running at low speed. This read pilot signal 11. The information signal 12 (l'' is supplied to the information processing circuit 2 including a microconverter, memory, etc. to process the above signal.The cassette tape 7 is loaded into the magnetic tape playback device 3, and the driver presses the keyboard 1. According to
When a start command is given to the information processing circuit 2, a command is applied to the high-speed reverse running control circuit 26 through the program identification circuit 21, and the cassette tape 7 enters a high-speed reverse running state.
The tape is rewound to the beginning, and the pilot signal 11 of the many data signal 14 is located. Next, a command is applied to the low-speed forward running control circuit 22, and the cassette tape 7
is in a slow forward running state and passes through the first pilot signal recording section, but the frequency of the pilot signal from the cassette tape 7 is fl, and the bandpass filter 19,
20, and no signal is applied to the information processing circuit 2.

Next, when the tape runs slowly forward to the recording section of the data identification signal 13, the signal of frequency f2 is transmitted to the bandpass filter 2.
o, and is applied to the information processing circuit 2. Next, the information processing circuit 2 identifies that the many 7 data signal 14 is applied, processes the next many data signal 14, and displays the menu 1 on the display device 6.

Next, the driver looks at the menu display, selects the required map number, and inputs it using keyboard 1. The cassette tape is in a high speed forward running state. Each time the pilot signal 11 passes through the recording section, the frequency of NFL is detected by the filter 19. The information processing circuit 2 counts the number of times of detection and compares it with the map number entered on the keyboard 1. When a match is found, the tape running is shifted to a low speed running state.The data content is confirmed by the next data identification signal 13,
Load map data and display 1.

Furthermore, when you need a map on the north side of the displayed map, press the switch to select the north side, and the information processing circuit 2 selects the necessary map data number using the same procedure as above, and when driving on the expressway, select the map data number at the beginning of the tape. Return.

During high-speed forward running, pilot signals 11 are counted and map data is selected and displayed. End signal 1 at the end of map data
5, and when this is read out, a command is applied to the stop control circuit 23 and tape running is stopped. A tape drive device 26 drives the cassette tape 7 and includes a motor, a capstan, a pinch roller, and the like.

As explained above, according to the present invention, by arranging the information recorded on the recording medium as described above, a map can be searched for and displayed automatically at high speed. When the driver manually inputs the current position using the keys, the information processing circuit 2 displays the current position on the display device 6. When the vehicle is driven, code signals relating to the direction of travel and distance traveled are supplied from the direction sensor 6 and the speed sensor 4 to the information processing circuit 2. An example of arithmetic processing performed by the information processing circuit 2 is shown in a flowchart in FIG. This will be explained below.

Let the number of the map currently displayed on the display device be the mnth map. And the current location of the vehicle.

If the map is divided into 266 dots horizontally and 192 dots vertically and indicated by (!., yo) as shown in Figure 7, 0≦X≦25.
It is given in the range of 6.0<, y≦192. As the vehicle moves, the amount of movement Δl per unit time is determined by counting the pulses from the speed sensor 4 and performing arithmetic processing. Based on this, the vehicle's traveling direction data θ is obtained from the direction sensor 6, and! The amount of movement (ΔX, Δy) in the direction and y direction is calculated by the information processing circuit 2, and ΔI=Δjcosθ, Δy=Δg si
Find nθ.

From now on, (x0+ΔX, 70+ΔV) will be the new current location (
”() + 16), and add the new current location to the old current location on the display device 6.

By repeating this, it is possible to display the driving trajectory of the vehicle.

Next, the information processing circuit 2 calculates whether or not the new current location is within the display range, and calculates the magnitude relationship between xo and 0 and 266, y0
Find the magnitude relationship between 0 and 192. xo is now 26
6, since xo≦256 is satisfied, the display map address is set to m+1, and this is set as the display map number (m,, n
), and set the value of xo 256 to be the current location ("o+yo) when the map becomes new."

Then, the magnetic tape playback device 3 is controlled, the position of the cassette tape 7 is moved, and a new map mn is read out.
The information is displayed on the display device 6, and the calculation continues as the vehicle continues to operate.

As explained above with the flowchart, one direction, y
The direction division may be different from (256, 192), and the value for determining the current location and switching the map may be, for example, x
o-5,x:,<260. y05゜y0≧187, etc.
The value may be different from 0,256,192.

Displays the trajectory, and even if the vehicle goes outside the currently displayed map, it automatically reads and displays the adjacent map in the direction of travel.
The driving route can be continuously displayed, allowing the driver to arrive at the destination smoothly.

[Brief explanation of the drawing]

FIG. 1 is a basic block diagram showing an example of a road driving information presentation system according to the present invention, FIG. 2 is a diagram showing an arrangement sequence of information recording patterns on a cassette tape used in the present invention, and FIG. A diagram to explain the division method,
FIG. 4 is a block diagram showing a configuration example of an information reproducing device used in the present invention, FIG. 6 is a characteristic diagram of a bandpass filter used in the information reproducing device shown in FIG. 4, and FIG. 6 is an embodiment of the present invention. FIG. 7 is a flowchart for explaining an example of information processing in the embodiment, and FIG. 7 is a diagram for explaining a display example in the same embodiment. 1...Keyboard, 2...Information processing circuit, 3...Magnetic tape playback device, 4...
・Speed sensor 3, 5... Orientation sensor, 6... Display device, 7... Cassette tape, 8... First track, 9... ...2nd track, 10...
...Signal group, 11...Pilot signal, 12
... Information signal, 13 ... Data identification signal, 14 ... Many data signal, 15 ...
...End signal, 16...Program data signal, 17...Map data signal, 18...
Audio signal, 19.20...Band pass filter, 21...Program identification circuit, 22...
...Low speed forward running control circuit, 23...0.・Stop 1 control circuit, 24.--.High-speed forward running control circuit, 26.
. . . High-speed reverse running control circuit, 26 --- . . . Tape drive device. Name of agent: Patent attorney Toshio Nakao Haga 1 person II
Figure 3 Figure 1 Tosei Figure 4 Figure 1 IR Figure 5

Claims (2)

[Claims] (1) Map 1. A recording medium on which information is recorded, an information reproducing device that reproduces the information recorded on the recording medium, and a keyboard that a vehicle driver inputs to obtain driving information;
A sensor for detecting the speed and traveling direction of the vehicle; an information processing circuit for processing reproduction information from the information reproduction device, detection information from the sensor, and input information from the keyboard; When presenting road driving information to a driver using a display device that visually displays road driving information to the driver based on output data, the recording medium includes a pilot signal and data for searching a map. A data identification signal for identifying the content of the data, a menu data signal for displaying a menu of map information recorded on a recording medium, an end signal for indicating when data has ended, and various program data including map information. By using a pre-recorded recording medium and reproducing the recording medium with the information reproducing device, a menu is first displayed on the display device, and the alphanumeric characters or place names displayed in the menu are entered on the keyboard. 1. A road driving information search method characterized in that a driver can search for a desired map by inputting the following information. (2) Horizontal transportation network divided into predetermined areas (
Divide into 10 pieces vertically (or horizontally),
Each divided part is assigned a number from OO to 990, and if the data is on the north side of the map data displayed on the display device, the map data corresponding to the number obtained by subtracting 1 from the second digit number can be searched, and the map data on the east side can be searched. If it is data, map information is arranged and recorded on a recording medium so that map data corresponding to a one-digit number minus 1 can be searched. Claim No. 3 is characterized in that map information of charcoal can be presented on a display device when
Road driving information search method described in section 1).