JPH0517486B2 - - Google Patents

Description

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

Conventionally, systems for displaying a vehicle's driving trajectory on a map displayed the driving path on a CRT screen, and a map printed on a transparent film was superimposed on top of that to display the driving path 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 used by the driver to input map information, 2 is an information processing circuit for processing digitalized map information and displaying it on a cathode ray tube display device 6, and 3 is a first keyboard. A magnetic tape reproducing device for reproducing a cassette tape (to be described later) in which map information and running information (audio signals) are recorded on a track and a second track, respectively; 4 a speed sensor for detecting the running speed of the vehicle; 5 a speed sensor for detecting the running speed of the vehicle; This is a direction sensor that detects the direction of travel. 1 to 6 of the above
is mounted on the vehicle. FIG. 2 is a diagram showing an example of the recording arrangement pattern of information recorded on the cassette tape 7 used in _FIG . , followed by the above constant frequency
It consists of an information signal 12 whose frequency is sufficiently higher than f ₁ . Constant frequency f ₁ of pilot signal 11
is 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 slow-to-high speed ratio n of tape running and the frequency _f1 of the pilot signal. The information signal 12 includes a data identification signal 13, a menu data signal 14, a program data signal 16, a map data signal 17, an end signal 15, and the like. The data identification signal 13 is a signal that instructs how to process the contents of the data, and
Use a specific code signal. It is recorded before the menu data signal 14, program data signal 16, and map data signal 17. End signal 15
is a signal indicating the end of the above data signal,
Recorded at the end of the above data. The menu data signal 14 has the data number of each map recorded as a code signal, and when an instruction to display menu data is received from the keyboard 1 in FIG. Signal 11 is recorded. In FIG. 2, reference numeral 9 indicates a second track, in which an audio signal 18 relating to vehicle running information is recorded.

FIG. 3 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 a function that can identify commands from the information processing circuit 2 to perform high-speed forward running, low-speed forward running, high-speed reverse running, and stop of the cassette tape 7, and can automatically control the running state of the magnetic tape. It is something. Furthermore, it has a magnetic head 27 for reading recorded signals from the cassette tape 7, and has the 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 a frequency of approximately nf ₁ from the pilot signal read out during high-speed forward and reverse running, and has the characteristics shown by A in FIG. 4. The bandpass filter 20 similarly has characteristics as shown by B in FIG.
This is to extract signals with a frequency of _f2 or higher when driving at low speeds. The read pilot signal 11 and information signal 12 are supplied to an information processing circuit 2 including a microcomputer, memory, etc. in order to process the signals. When the cassette tape 7 is loaded into the magnetic tape reproducing device 3 and the driver gives a start command to the information processing circuit 2 using the keyboard 1, a command is applied to the high-speed reverse running control circuit 25 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 menu data signal 14 is cued. Next, a command is applied to the low-speed forward running control circuit 22, and the cassette tape 7 enters a low-speed 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 _f1. Yes, the signal cannot pass through either of the bandpass filters 19 and 20, and no signal is applied to the information processing circuit 2.

Next, when the tape runs forward at low speed to the recording section of the data identification signal 13, the signal of frequency f ₂ passes through the bandpass filter 20 and is applied to the information processing circuit 2. The information processing circuit 2 identifies that the next menu data signal 14 will be applied, processes the next menu data signal 14, and displays a menu on the display device 6.

Next, the driver looks at the menu display, selects the required map number, and inputs it using the 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 nf ₁ is detected by the bandpass filter 19. The information processing circuit 2 counts the number of detections and compares it with the map number inputted on the keyboard 1. When a match is found, the tape running is shifted to a low speed running state. The next identification signal confirms the data content, reads the map data, and displays it.

Furthermore, if a map in front of the displayed map is needed, it can be displayed by following the same procedure as above. There is an end signal at the end of the map data,
When this is read out, a command is applied to the stop control circuit 23. Then, tape running stops.
Note that 26 in FIG. 3 is a tape drive device that drives the cassette tape 7 to run, and includes a motor, a capstan, a pinch roller, and the like.

As explained above, according to the present invention, at high speed,
Additionally, a desired map can be automatically searched and displayed, and position alignment can be performed. Additionally, along with the display of the map, audio related to the vehicle's driving information is emitted, allowing the driver to grasp the surrounding situation from this information, making it easier to input keys without having to look at the video information, even in dangerous driving situations. .

When the vehicle is driven after inputting the current position, the heading sensor 5 and speed sensor 4 supply the vehicle's traveling direction and travel distance as a code signal to the information processing circuit 2, and the driving trajectory is drawn on the map. Of course.

[Brief explanation of the drawing]

FIG. 1 is a basic block diagram showing an example of the road driving information presentation method according to the present invention, FIG. 2 is a diagram showing an example of the arrangement of information recording patterns on a cassette tape used in the present invention, and FIG. 3 is a diagram showing an example of the arrangement of information recording patterns on a cassette tape used in the present invention. FIG. 4 is a block diagram showing an example of the configuration of the information reproducing apparatus used. FIG. 4 is a characteristic diagram of a bandpass filter used in the information reproducing apparatus shown in FIG. 3. 1...Keyboard, 2...Information processing circuit, 3...
...Magnetic tape playback device, 4...Speed sensor, 5...
... Orientation sensor, 6 ... Display device, 7 ... Cassette tape, 8 ... First track, 9 ... Second track, 10 ... Signal group, 11 ... Pilot signal,
12... Information signal, 13... Data identification signal, 1
4...Menu 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...Stop control Circuit, 24...High speed forward running control circuit, 25...
...high-speed reverse running control circuit, 26...tape drive device.

Claims (1)

[Scope of Claims] 1. A tape-shaped magnetic recording medium on which map information is recorded, an information reproducing device capable of reproducing information recorded on the recording medium at two stages of high speed and low speed, and a vehicle driver who is driving a vehicle. a keyboard for inputting instruction information to obtain information; a sensor for detecting the speed and direction of travel of the vehicle; and processing reproduction information from the information reproduction device, detection information from the sensor, and input information from the keyboard. and a display device for displaying road driving information to a driver based on the output data of the information processing circuit, and a first track of the recording medium is provided with The speed ratio between high speed and low speed of the state is n
In this case, a pilot signal with a low frequency f ₁ satisfying nf ₁ <f ₂ and an information signal with a high frequency f ₂ are recorded, an audio signal related to vehicle running information is recorded on the second track, and the above-mentioned The pilot signal is detected when the recording medium is running at high speed, the information signal is detected when the recording medium is running at low speed, and the map information is visually displayed on the display device, and the vehicle running information is audible. A road driving information presentation method characterized in that the road driving information is pronounced. 2 The information signal includes a data identification signal for identifying the content of data, a menu data signal for displaying a menu of map information recorded on a recording medium, an end signal indicating that data has ended, and map information. A menu is first displayed on a display device based on the information signal, and a map can be searched by inputting numbers displayed in the menu from a keyboard. A method for presenting road driving information according to claim 1.