JPH0627972B2 - Position recognition disk device for automobiles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, the position and frequency information of electromagnetic wave transmission points of three or more points that transmit different frequencies such as televisions and radios are recorded in the first frame group of an image disc, and are stored on one side. A macro map, a semi map, and a micro map, which are divided into subdivided maps, are recorded in each frame of this disc, and the address information of each map is also recorded in the first frame group of the disc. The present invention relates to a position recognizing disk device for an automobile or the like, which detects the direction of the position, calculates an existing position, makes a quick access to a corresponding map included in the existing position from the address information of the map, and displays it on a display.

Even if you try to recognize the position of yourself by simply storing the subdivided map in the image disc, it is often the case that the existing position is unknown and it is complicated to select the corresponding map for a moving object each time, The actual situation is that it has not been commercialized. The present invention provides a method of accurately finding the position of one's own by using a large number of televisions, radio broadcasting stations, relay stations and other electromagnetic wave sources existing in close proximity, and immediately accessing the corresponding map and displaying it on the display. It will be described in detail with reference to the drawings.

Antenna (1) is a motor controlled by control (2)
Rotate at a constant speed in (3) and select an electromagnetic wave of a predetermined frequency in the receiving circuit (4) to obtain its electric field (magnetic field) intensity distribution curve. The control (2) and the CPU (5) analyze this curve and calculate the direction of the transmission point that is emitting the predetermined frequency, and perform this tuning at least three times to determine the direction of three or more transmission points. The position of the self (P) is calculated. This calculation method uses the axiom that a circle passing through the three points of origin (A), (C) and existence position (P) can be drawn, and as shown in FIG.
First, the angle difference (θ) between the transmission points (A) and (C) is calculated, and the known distance A
The center point (O ₁ ) and its radius O ₁ A can be obtained from C and. The distance AC can be easily calculated because the coordinate values of the transmission points (A) and (C) are known. The circumference passing through the three points (A), (C), and (P) can be drawn as shown, but the point (P) is unknown at this stage.
Next, find the angular difference (γ) between the transmission points (C) and (E), calculate the distance CE, and similarly, find the coordinate value of the center point (O ₂ ) and the radius O ₂ C as shown in the figure. Draw a circle that passes through the three points (C), (E), and (P). The intersections of both circles are points (C) and (P), and the coordinate value of the existing position (P) can be accurately obtained. This calculation method is based on the premise that at least three or more transmitting points that emit electromagnetic waves of different frequencies can be received. In the present invention, a television, a radio broadcasting station, a relay station thereof, etc. that are familiar to us are adopted, The frequency and position information is stored in the first frame group of the image disk. In Fig. 4, transmission points (A) to (G) are adopted, and position information on XY coordinates is recorded. Will be done.

As a video disc player for recording map information as a still image, a compact laser disc device (CD player) capable of reproducing a still image will be described with reference to FIG. 2. The signal detection pickup under the control of the tracking and hocus servo (6) ( 7) The image signal read from the CD disc (8) is sent to the waveform shaping digital conversion (9) for this conversion.
(9) EFM demodulates, the digital signal processing unit (11) under the control of the system control unit (10) processes this demodulated signal and sends it to the DA converter (12), and displays it through the amplifier (13). To play still. When reproducing for music (CD disc (8)), the DA conversion (14) and the low frequency filter (15) are used to reproduce sound without distortion. This still image playable CD
The player (16) displays the coordinate value information of the transmission point on the CD disc.
Control with built-in memory etc. received from (8)
Controlled by (17), through which the corresponding map TV
Project to (18).

Next, the method of recording the map on the CD disc (8) will be explained. The entire map to be stored on one side of the disc is overlaid on the orthogonal coordinate plane as shown in FIG. 4, and vertical lines are formed at equal intervals parallel to the orthogonal axis. 32 macromaps (20) are divided and formed by subdividing the cells into horizontal lines.

In order to specify this macro map (20), the symbols a ₁₆ , a ₃₂ , a ₄₈ ... a ₁₂₈ for every 16 scales are sequentially allocated at equal intervals on the X-axis, and the same symbols are assigned on the Y-axis. Allocate b ₁₆ , b ₃₂ , b ₄₈ , and b _64, and use (a _{16n + 16} ~ a _16n b _{16m + 16} ~
b _16m ] (where n and m are natural numbers including 0) are defined. Point (P)
The address of the macro map (20) in the shaded area including is (a _80- a
₆₄ b _{32 to} b ₁₆ ], addresses are given to a total of 32 macro maps (20), and the macro maps (20) of respective addresses are recorded correspondingly at predetermined frame addresses of the CD disk (8).

Each macro map (20) is subdivided into 16 equal parts to form a semi-map (21) (FIG. 5). Address function for semi-map display [a _{4n + 4 to} a _4n b _{4m + 4 to} b _4m ]
If defined as (where n and m are natural numbers including 0), the address of the semi-map (21) in the shaded area including the point (P) is [a _{76 to} a ₇₂
b _{28 to} b ₂₄ ]. Addresses are thus given to a total of 512 semi-maps (21) and recorded on a predetermined frame address of the CD disk (8).

The semi-map (21) is similarly subdivided into 16 equal parts to form micro-maps (22) (FIG. 6). Since the address function in the case of the micro map (22) display has one scale on one side, it is defined by a simple expression as [a _{n + 1 to} a _n b _{m + 1 to} b _m ]. In the figure, the address of the micro map (22) including the point (P) is [a _{74 to} a ₇₃ b _{27 to} b ₂₆ ]. The number of semi-maps (21) (512) x 16 = 8192, 8192 total micro-maps
An address is given to (22) and recorded at a predetermined frame address of the CD disc (8). And the macro map (20),
Forecast the information of each address of the semi-map (21) and micro-map (22) and the corresponding frame address CD disk
It is recorded in the first frame group of (8), and when loaded in the CD player (16), this address information is automatically read and stored in the memory of the control (17), and a predetermined operation is made by the input operation of the keyboard (19). Allow the map to be picked up and appear on the display (18). As shown in Fig. 4, information on the positions of different electromagnetic wave transmission points (A) to (G) on the Cartesian coordinate plane, their transmission frequencies, distances from each transmission point, etc.
Pre-recorded in the first frame group of the CD disc (8),
Immediately upon operation, it is transferred to the memory of the control (17).

Next, the operation of mounting the present device on a vehicle and displaying the existing position (P) and the corresponding map on the display (18) will be described. The direction of the transmission points (A) to (G) that emit three or more different frequencies is calculated by the operation of the control (2), and the coordinates (x, y) of the position (P) are calculated by the operation of FIG. Then, as shown in FIG. 4, the position (P) is dot-displayed on the display showing the whole map. If the length of a ₁ and b ₁ which are single scales is taken as 200 m, a ₈₀ corresponds to 16 km and b ₃₂ corresponds to 6.4 km. If the coordinates of the obtained position (P) are (14.65km, 5.3km), the discrimination circuit in the control (17) derives the symbols (a _73.25 , b _26.5 ) obtained by dividing these coordinate values by 200m. Based on this, addresses [a _{80 to} a ₆₄ b _{32 to} b ₁₆ ] are calculated in the macro map (20). Therefore, when the [key] of the macro map display is pressed, the map (20) of this address is immediately displayed, and the dot at the coordinate corrected position (P) is superimposed as shown in FIG. If the dot locus at position (P) is left on the display screen, the traveling direction and locus of the automobile can be known. As soon as this position (P) is off the screen, the macro map of the address next to it (20)
Will be accessed instead and displayed on the screen. When the accuracy is insufficient with the macro map (20), the semi-up display [key]
When is pressed, the control (17) is selected from the 512 semi-maps (21) by the symbol (a _73.25 , b _26.5 ) at the above position (P), and the semi-map of the address [a _76- a ₇₂ b _28- b ₂₄ ] Select the map (21) and quick access to display it on the screen. position
The dot position of (P) is corrected along with the map shift and is imposed on the drawing (FIG. 5). If you want to see a more detailed map, press the [key] of the micro map display and select the address [a] from 8192 micro maps (22).
_{74 to} a ₇₃ b _{27 to} b ₂₆ ] are similarly randomly accessed and displayed on the screen (FIG. 6).

As described above, according to the present invention, the existence position (P) is calculated from at least three electromagnetic wave transmission points that emit different frequencies, and a predetermined map including this position is recorded on a CD disc.
Select from (8), display a still image on the display, display the position (P) on this still image map with dots, and subdivide it sequentially into macro map (20), semi map (21), micro map (22). The address information is attached to the map and recorded on the CD display (8), so that the running vehicle can accurately and quickly confirm the existing position on the display. In addition, it is not permissible to search for any map by keyboard operation and display it on the display, and you can select a map of the desired size by using the map display key. Further, since this CD breaker (16) can naturally reproduce DAD sound, it can enjoy music without distortion in a car and can be used for various purposes.

[Brief description of drawings]

The drawings show an example of the embodiment of the present invention. FIG. 1 is a block diagram of the entire system, FIG. 2 is a block diagram of a CD player, and FIG. 3 is from three transmitting points for transmitting different frequencies. Fig. 4 is an explanatory diagram for obtaining the position, Fig. 4 is an explanatory diagram when the whole map is placed on the orthogonal coordinate plane and divided into squares to divide the macro map, and Fig. 5 is divided into 16 equal parts. FIG. 6 is an explanatory diagram when the semi-map is divided, and FIG. 6 is an explanatory diagram when the micro-map is divided by dividing the semi-map into 16 equal parts. 16 ... CD player, 17 ... Control 20 ... Macro map, 21 ... Semi map 22 ... Micro map

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-58-175018 (JP, A) JP-A-55-105874 (JP, A) JP-A-59-64985 (JP, A) JP-A-57- 161776 (JP, A) JP 52-26243 (JP, A) JP 57-208584 (JP, A) JP 54-102891 (JP, A) JP 55-146006 (JP, A)

Claims (1)

[Claims] 1. A position of a vehicle or the like is calculated from each direction of a television or a radio which transmits different frequencies or a relay station thereof, and each address function is defined in a macro map and a semi-map or a micro map obtained by subdividing the macro map. Then, the address value obtained from each address function and the information of the frame number corresponding to the address value are stored in the memory, and the address value of the map including the position coordinates of the already calculated vehicle is calculated by the discrimination circuit,
A position recognition disk device for automobiles that reproduces the map corresponding to this address value on the display and displays the position of the car on this screen.