JPH0244170Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides an image receiving device (for example, a home television device) or a similar device at the output end of a navigation device.
A cathode ray tube (hereinafter referred to as a CRT display device)
These are called cathode ray tubes), and a map, circles, lines, etc. are drawn on the surface of this cathode ray tube, and the position of a moving object equipped with navigation equipment moving on the sea or land is displayed from the relationship with this map etc. The present invention relates to an automatic position display device that allows users to know the position of a security guard.

[Conventional technology]

Methods for a moving object to know its own position include astronomical observation, a method for measuring the direction of arrival of two radio waves, a method for emitting radio waves from a moving object, and receiving each radio wave.
Alternatively, there is hyperbolic navigation that utilizes the difference in reception time from a transmitting station at a predetermined position, but navigation equipment generally uses astronomical observation.

By the way, when a mobile object equipped with conventional navigation equipment determines its own position, it requires the use of special maps, conversion tables, etc. suitable for the navigation equipment, which is a very complicated method. The drawback is that it requires a lot of time. Furthermore, not everyone can quickly and easily determine the direction of radio waves or the location of their own moving object, but only those who know how to read maps and conversion tables and how to calculate them can do so. Furthermore, even if you know how to calculate the position, if you look at it incorrectly or use the wrong calculation method, you may end up with a completely different position. Taking ships as an example, ships must pay the utmost attention to safe navigation, and to do so, not only must navigation equipment be constantly monitored to check for obstacles, but also how many people are on board. Since it was necessary to secure observers to carry out monitoring, the personnel costs were considerable.

On the other hand, a proposal for a display device for airports that uses a computer to display flight tracks on a cathode ray tube was published in "THE JOURNAL OF NAVIGATION (VOL.27, NO.3)" A total nautical system that processes information such as the gyroscope compass direction using a computer and displays information on grounding prevention and collision prevention on a cathode ray tube was introduced in the ``Ship Science Magazine'' (May 1975 issue). In either case, the configuration is large and expensive.

[Problem that the invention attempts to solve]

An automatic position display device that is simple, small, inexpensive, and allows you to clearly see the position, direction of movement, or dangerous situation with respect to dangerous lines of a moving object equipped with the device by simply connecting it to a normal navigation device. If it can be provided as an easy-to-use device, it will become a device that can be used even on small ships and contribute to the safety of navigation, but in order to meet this purpose, there is the problem of how to configure it easily and inexpensively. .

[Means for solving problems]

This idea consists of a first memory that stores position signals obtained from navigation equipment in order to display the track of a moving object as latitude and longitude data, that is, data that can be called absolute position; The trajectory of the moving object is displayed by displaying the absolute position display point corresponding to the own position on a display device such as the above-mentioned television device, that is, on a display screen formed by horizontal scanning and vertical scanning. (hereinafter referred to as current track display); track display means for supplying a signal obtained by reading the stored contents of the first memory to the display device; and a track display means for displaying a map corresponding to the current track display. A second memory for storing map data and signals for displaying latitude lines and longitude lines corresponding to the current track display are obtained in synchronization with respective synchronization signals for horizontal scanning and vertical scanning of the display screen. latitude and longitude line signal means;
The above-mentioned problems can be solved by using a plurality of different navigation devices as the navigation devices and providing a position signal selection means for selecting any of the signals obtained from these navigation devices to obtain the position signal. It is designed to be able to solve the problem.

〔Example〕

Examples will be described below with reference to the drawings.

In Fig. 1, 1a, 1b, etc. are navigation equipment that is mounted on a mobile object moving on the sea or land and outputs an analog data signal based on its own position, and the analog data signal is transferred to the output side as digital data. An A-D conversion circuit 2 for converting into a signal is connected. If the navigation equipment 1a, 1b, . . . directly outputs digital data signals, the A/D conversion circuit 2 is not necessary. 3 is a data selector circuit which determines which navigation equipment 1a, 1b, . . . data signal is to be used based on the address signal of the equipment switching circuit 4.

The data signal output from this circuit 3 is passed through a subsequent input/output control circuit 5 to a microcomputer etc. 6 (hereinafter referred to as a computer).
is supplied to In addition, the input/output control circuit 5
Error correction data of the day, month, time, etc. of the navigation equipment 1a, 1b, etc., which cannot be avoided, is sent from a clock device (not shown). This computer 6 determines whether the data signal from the input/output control circuit 5 has been converted into latitude and longitude.
If it has been converted, it is passed through as is, and if it has not been converted, it is coded and stored in advance to convert the output signals of the navigation equipment 1a, 1b, etc. into latitude, longitude, or coordinates. The data is read from the memories 7a, 7b, . . . , the above conversion process is executed, and the position data is output. The computer 6 also calculates the moving direction of the moving body using data obtained from a gyro compass, a magnetic compass, etc., obtained through the input/output control circuit 5. 8 is a decoder.

Accordingly, the position data from the computer 6 is sent to the subsequent line via the input/output control circuit 5 which functions as an output circuit according to the commands from the computer 6.
The signal is sent to the display control circuit 11 through the data memory 9 and memory switch 10. In this case, by turning off the switch 10, the data read in the line data memory 9 is sequentially read out to create a track for the moving object, and on the other hand, by turning on the switch 10, the sequentially measured position data is directly output. I try to do that. Reference numeral 12 denotes an oscillation circuit that oscillates a pulse of a predetermined frequency at the same time as the power switch (not shown) of this device is turned on. On the output side of this circuit, a plurality of longitude frequency divider circuits 14a are connected in series via a scale switch 13, respectively. 14b... and latitude frequency dividing circuits 15a, 15b... are connected. That is, the longitude frequency dividing circuits 14a, 14b, . . . divide the output signal of the oscillation circuit 12, and synchronize it with the vertical synchronization signal V.SYNC of the CRT display circuit 16 to generate a longitude line signal. Similarly, latitude dividing circuits 15a, 15b...
also divides the output signal of the oscillation circuit 12, and
A latitude line signal is generated in synchronization with the horizontal synchronization signal H.SYNC of the display circuit 16. These longitude frequency dividing circuits 14a, 14b... and latitude frequency dividing circuit 1
5a, 15b... are individually operated by switches 17,
18 to sequentially change the longitude line signal and the latitude line signal. Furthermore, these switches 17 and 18 are designed to be switched in conjunction with a subsequent map changeover switch 19. Reference numeral 20 denotes a coincidence circuit that outputs a coincidence signal of a longitude line signal and a latitude line signal.The coincidence signal of the circuit 20 is inputted to a video control circuit 21, from which a display signal of longitude lines and latitude lines is sent to a cathode ray tube of a television. supplying.

Reference numerals 23a, 23b, . . . are map memories in which data for drawing a map on a cathode ray tube are stored in advance, and these map memory data are transferred to a map changeover switch 19 according to instructions from a display control circuit 11 having functions such as a microcomputer. This data is sent to the memory flash circuits 24 and 2 via the CRT display circuit 16 along with the position data.
Temporarily store it in 5. Since characters, numbers, maps, etc. cannot be directly displayed in the memory flash circuits 24 and 25, 26 and 27 are connected to the memory flash circuit 2.
These are character generation circuits and pattern generation circuits that store patterns of characters, numbers, maps, lines, etc. corresponding to the stored data of No. 4 and 25 in advance and display them on the screen. 2
8 is a multi-circuit, and 29 is a blinking switch.

In other words, characters, numbers, symbols, etc. from the character generation circuit 26 are sent to the video control circuit 28 through the multi-circuit 28.
1 to enable blinking display, and switch 29
When the switch 29 is closed, the light can be displayed through the switch 29. This video control circuit 21 has
Timing signal from CRT display circuit 16
A video signal is created by inputting DISPTMG, a start signal CUDISP to determine where on the cathode ray tube to start drawing, and horizontal and vertical synchronization signals. 31 is a reset button for clearing the display control operation of the display control circuit 11.

Further, this device is provided with a warning switch 32, a warning detection circuit 33, etc. in order to display a line on a map or to determine an arbitrary line from one's own position and perform a warning operation. Warning is displayed by control circuit 1
1 to the speaker 3 via the speaker control circuit 34.
Run step 5. 36 is a self-installed disability switch,
37 is a self-placement range generation circuit, and these 36,
37 is also used as a means for warning, as will be described later.

Next, the operation of the automatic position display device configured as above will be explained. Each output data (data due to position) of the navigation equipment 1a, 1b, . This input/output control circuit 5 has the unavoidable days, months, and
Error correction data such as time is supplied from a clock device (for example, an oscillation circuit 12 or the like may be used). Then, these data are input into the subsequent computer 6 and converted into latitude and longitude or coordinates. However, depending on the navigation equipment 1a, 1b, etc., the latitude and longitude may have already been converted, so the computer 6 first converts the latitude and longitude. It is determined whether or not they have been converted, and if they have been converted, they are passed through as is, and if they have not been converted, conversion processing is performed.

In this conversion processing operation, the computer 6
This is performed by operating the decoder 8 to select the data memories 7a, 7b, etc., which have pre-coded and stored data necessary for latitude/longitude conversion or coordinate conversion, and read out the memory contents. Use this to correct errors in the day, month, time, etc.

At this time, depending on the navigation equipment 1a, 1b, etc., it may be necessary to capture two different radio waves to determine the position, so in such a case, the previously measured value is stored in the memory circuit of the computer 6. and executes only when another measurement value is input.

When performing coordinate transformation, data from the data selector circuit 3 is read by the computer 6, and coordinate points are stored one by one in the data memories 7a, 7b, . . . while addressing necessary data.

Furthermore, the navigation equipment 1a, 1 without moving the mobile object.
When measuring the arrival direction of radio waves by moving the reception direction of b..., a reference pulse is generated based on the zero degree of the navigation equipment 1a, 1b..., but it is possible to use a cathode ray tube display method or a meter display method. In this case, since there is an oscillation circuit 12 with a phase difference of 90°, this is used to convert the analog signal to digital and create a reference zero pulse. Navigation equipment 1a, 1
If b... is digitally displayed, use the signal as it is. The incoming radio wave is received by the reference pulse thus obtained, and this incoming received pulse is also digitally converted and compared with the previously mentioned reference pulse by the computer 6 to detect a phase difference or shift.

In addition, when the moving object is moving, it receives the output of a magnetic compass or gyroscope separately,
The difference from the pulse obtained by the above means with any one of east, west, south, or north as a reference is the arrival direction of the radio wave with east, west, south, or north as a reference, and It is also the direction of movement of your moving object. However, it is still not possible to determine from which location on the map the direction of arrival of the radio waves is coming from, so in order to know this, the source of the radio waves is determined as follows. In other words, the beacon band is the main source of normally incoming radio waves that indicates one's own location, and the transmitting station in this frequency band has its own code (for example, an alpha code) and constantly transmits that code to determine its own location. , so the sign is A-
If it is converted into a digital signal by the D conversion circuit 2 and input into the computer 6, it can be displayed on a map. Note that by increasing the number of A-D conversion circuits 2, the number of navigation devices 1a, 1b, . . . that perform direction measurement can be increased.

The positional data to be displayed as points on a map etc. obtained by the computer 6 in the above manner is returned to the input/output control circuit 5, but at this time, the input/output control circuit 5 outputs the output circuit according to the instructions from the computer. Therefore, data is immediately read into the line data memory 9. At this time, when the memory switch 10 is turned off, the previously read data is sequentially read out to draw the trajectory of the moving object, and when the memory switch 10 is turned on, the sequentially converted data is directly output. .

On the other hand, latitude and longitude line signals for the cathode ray tube are created as follows. That is, the pulse of the oscillation circuit 12 that oscillates when the device power is turned on is transmitted to the longitudinal frequency dividing circuit 14.
a, divides the frequency, and displays the CRT display circuit 16.
The longitude line signal is obtained by synchronizing with the vertical synchronization signal from. In addition, the pulse of the oscillation circuit 12 is input into the latitude frequency dividing circuit 15a and frequency-divided, and the CRT display circuit 16
The latitude line signal is obtained by synchronizing with the horizontal synchronization signal from. These signals are then passed through the subsequent frequency divider circuit 14.
b, 14c... and 15b, 15c... to perform frequency division sequentially, and then send the divided output to switch 1.
7 and 18 to change the longitude line and latitude line signals of the cathode ray tube. Note that the longitude line and latitude line signals are switched in conjunction with a map changeover switch 19 so that they match the map from the beginning. And switch 1
The two signals obtained through signals 7 and 18 pass through a matching circuit 20 and enter a video control circuit 21, where they are displayed on a cathode ray tube as latitude lines and longitude lines. Note that these latitude lines and longitude lines can also be erased by opening the scale switch 13.

Next, to draw maps, characters, lines, etc. on the cathode ray tube, the following signal processing is performed. First, the display control circuit 11 switches the map changeover switch 19 to select the map memory 23a, 23 which stores map data in advance.
b... is selected, and the built-in microcomputer reads out the contents of the memory one by one, along with the data from computer 6 in order to constantly refresh and display the map on the CRT surface.
The data is temporarily stored in the memory flash circuits 24 and 25 via the CRT display circuit 16. In other words, characters are refreshed onto a cathode ray tube in exactly the same way as a general CRT display, but the main difference here is that a pattern generator is inserted instead of characters, and when characters are displayed, they are displayed horizontally and vertically. spaces, vertical blanks (digit spaces)
It has a shape in which it is submerged in a pattern.

In this way, data is written from the CRT display circuit 16 to the memory flash circuits 24 and 25, but since maps and characters cannot be displayed on the cathode ray tube with this output as is, the character generation circuit 26 and the pattern generation circuit 27 Convert it to a pattern that can be displayed on screen. The character generation circuit 26 is a type of read-only memory that converts character and numeric signals into pattern signals that can be displayed on the screen in advance, and has the function of a character generator that outputs the necessary character or numeric signal when an address is specified from the outside. It has Similarly, the pattern generation circuit 27 stores various patterns, and draws out and combines the patterns by address designation to create a single map. The shape of this map is the map memory 23a, 2
It is determined by the data of 4b,...

The pattern generating means and the like will be further explained in detail with reference to FIG. In other words, the pattern generation means is a type of read-only memory (ROM) as mentioned above.
For example, a 5 x 7 dot configuration.
Various patterns, etc. are masked on the ROM board, and by giving an address signal, the patterns, etc. are taken out one by one and combined to create a one-screen map. The number of dots can be configured not only 5x7 but also any number of dots you like. This method is the same as that of commercially available character generators, the only difference being whether the content is characters or patterns.

In addition, the character generation circuit 26 not only displays the longitude and latitude of the person on the cathode ray tube numerically,
Latitude lines and longitude lines can also be expressed with numbers, or one's position can be displayed with letters or symbols, and the output of this circuit 26 can be displayed blinking through the multi-circuit 28, or lit by closing the switch 29. Make it.

Then, a character generation circuit 26 and a pattern generation circuit 27
The signal output from the video control circuit 21 enters the video control circuit 21. This video control circuit 21 receives a timing signal DISPTMG from the CRT display circuit 16, and a start signal indicating where to display on the cathode ray tube.
A video signal is created by inputting CUDISP, horizontal and vertical synchronization signals, etc., and when this signal is applied as an electron beam onto the fluorescent surface of a cathode ray tube and is deflected according to certain rules, images such as maps and points are created on the cathode ray tube. It is formed.

Therefore, the position of a moving object, etc. can be easily displayed using a commercially available home television receiver. There are the following four methods for displaying on a television receiver. , a method of supplying horizontal and vertical synchronization signals and a video signal to a cathode ray tube independently, , a method of supplying a mixture of the two horizontal and vertical synchronization signals and a video signal to a cathode ray tube, , a method of supplying a video signal to a cathode ray tube, a method of horizontal and vertical synchronization There is a method of mixing the signal and video signal with a mixer circuit and supplying the mixture to a cathode ray tube, and a method of high-frequency modulating the output of the .

If you want to display a map, your location, latitude and longitude lines, numerical values, or direction of arrival of radio waves in different colors on a cathode ray tube, use the configuration shown in Figure 3 and the signals shown in Figure 4. It becomes possible by obtaining. In FIG. 3, 41 is a clock generator, 42 is a 3.58MHz oscillation circuit, 43 is a modulation circuit, and 44 is a high frequency modulation circuit. That is,
A generator signal from a clock generator 41 is added to a pulse signal (luminance signal) that displays a map or your location on a cathode ray tube and is transmitted (actually, a 3.58 MHz subcarrier from an oscillation circuit 42 is used, and the amplitude of the subcarrier is adjusted by the color difference. (modulates the signal proportionally). In addition, when detecting the R-Y and B-Y signals from the carrier color signal on the television side, synchronous detection must be performed, so a burst signal of 8 to 12 cycles is added to the trailing edge of the synchronous signal to generate the color video signal. Output as .

Further, as the color display means, for example, R, G, B display means having a configuration as shown in FIG. 5 may be used.
That is, gate circuits 52R, 52G, 52B are provided in front of each video amplifier 51R, 51G, 51B,
A character or pattern pattern is input to one input side of the gate circuits 52R, 52G, 52B, and color information having a color ratio from the color encoder 53 is sent to the gate circuits 52R, 52 separately from the pattern information.
It inputs and controls the other input of G and 52B to create a color video signal.

Next, the warning detection operation will be explained. There are two methods for detecting this warning: one is to set an arbitrary line on the map from the beginning, and the other is to determine an arbitrary line from your position and issue a warning. In the former case, when drawing a map, a program is determined from the beginning, the map is drawn on the cathode ray tube, and one's position is represented on this map. Then, by turning on the warning switch 32 and operating the warning detection circuit 33 in response to the position signal displayed on the map, the contents of the memory address at that time are reset, and the line calibration data on the map and the own position are calculated and made the same. When the position is reached, a speaker operation signal is given to the speaker control circuit 34 to drive the speaker 35 and generate a warning.

Next, in order to generate a warning line based on the latter's own position, calculation is performed in the display control circuit 11 based on the output of the input/output circuit 5, that is, the own position output data, and the address bus line for map generation memory is generated. The self-placement fault switch 36 is turned on through the self-placement fault switch 36 to control the self-placement range generation circuit 37. This determines the start position and outputs pulses in sequence.
When drawing a map, the pattern generating circuit 27 is controlled in a similar manner to draw circles or lines. Warnings occur via a similar route as described above.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various ways. FIG. 6 shows a configuration for making the output circuit system of the device into a compact package. That is, the clock signal of the clock generator 60 is used to generate horizontal and vertical synchronization signals in the timing control circuit 61, and at the same time, the league counter 62 is also operated to control the data strobe, so that reading and writing to the refresh memory 63 can be performed. can. Furthermore, when the memory strobe is controlled, the generator control circuit 64 operates, thereby causing the character generation circuit 26 and the pattern generation circuit 27.
is controlled, and character and pattern signals are outputted from the same circuits 26 and 27 and supplied to the video control circuit 21.
Then, horizontal and vertical synchronizing signals are input to the same circuit 21 and output as a video signal. 65 is an interface, 66 is a write counter, and 67 is an address selector. The whole of these circuits can be made into one pack.

FIG. 7 shows another example of the present invention, in which horizontal and vertical synchronizing signals are generated by the frequency dividing circuit built in the oscillation circuit 70 and supplied to the mixing circuit 71.
Display positions on the cathode ray tube are created in advance by a counter gate, and arranged in an order to form a map in a memory circuit 72, and code signals are output one by one using pulses from a control section 73 to arrange them. In addition, the character display is addressed from a separate line, and all signals [horizontal,
The vertical cursor (latitude, longitude lines), characters, map, location] can be combined and modulated by the high frequency circuit 74 to create a video signal to be supplied to the cathode ray tube.
It is also possible to change the memory contents of the memory circuit 72 into a map.

As detailed above, according to the present invention, a home television receiver or a similar cathode ray tube is used to draw the map, etc. that the user needs on the cathode ray tube, and the user can determine his or her position on this. By inputting the output signal of a capable navigation device, you can display your location on the map by lighting or flashing, and in addition to this, it is also possible to display letters, numbers, etc. You can find your location simply by looking at the cathode ray tube, without going through the complicated process of finding your location using a map or conversion table. Moreover, since no skill is required for operation, not only can anyone monitor the system, but unlike artificial calculation methods, there is no possibility of erroneous positions.

You can also display an arbitrary line on the map and issue a warning when your position reaches that line, or draw a circle, etc. within a certain range from your position and indicate that other obstacles are within this range. It is also possible to generate a warning when this occurs. This prevents ships from accidentally entering the 200 nautical mile line, and also prevents collisions with other ships. Furthermore, conventionally, it required a great deal of skill and effort to find a track of a location, but this device has the advantage of being able to easily display the track and direction of arrival of radio waves.

[Effect of idea]

As described above, according to this invention, as described in the embodiment, A. For example, the position signals obtained from the navigation equipment 1a, 1b, etc. are B. A first memory such as the line data memory 9 which is corrected if necessary and stored as latitude and longitude data, that is, data that can be said to be an absolute position; For example, the character generation circuit 26, the multi-circuit 28, the video control circuit 21, etc.
On the display screen of a display device having a display screen consisting of horizontal and vertical scanning, such as a cathode ray tube, which has a CRT display circuit 16 that performs synchronous scanning using a horizontal synchronizing signal H.SYNC and a vertical synchronizing signal V.SYNC. In order to display the track of the moving object on the display screen, for example, by blinking, in other words, to display the current track so that one's current position can be known, the first
C, for example, a map data memory 23a, 23b...
A second memory for storing map data for displaying a map corresponding to the current track display, as shown in FIG. Output signal is horizontal synchronization signal H・SYNC and vertical synchronization signal V・SYNC
A signal for displaying the latitude and longitude lines corresponding to the current track display by displaying the latitude and longitude lines in synchronization with the horizontal and vertical scanning of the display screen. The latitude and longitude line signal means is synchronized with the signal, and the navigation equipment is a plurality of different navigation equipment, such as 1a, 1b, etc., for example, the data selector circuit 3 and the equipment switching circuit 4. like,
By having a configuration including position signal selection means for selecting any of the signals obtained from these navigation devices to obtain the position signal, it is possible to determine one's own position and to obtain various information related thereto. Along with the display,
It is possible to provide an automatic position display device that allows the user to clearly know the position, and has the feature that it can be constructed relatively easily and at low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an automatic position display device according to the present invention. FIG. 2 is a diagram showing an example of a pattern generation pattern when creating a map or the like using the apparatus shown in FIG. 1, and FIG. 3 is a block diagram showing an example of a configuration for obtaining a color video signal. FIG. 4 is an operational waveform diagram of FIG. 3, FIG. 5 is another block diagram for similarly obtaining a color video signal, and FIGS. 6 and 7 are other embodiments for generating character and pattern signals. FIG. 1a, 1b...Navigation equipment, 3...Data selector, 5...Input/output control circuit, 6...Computer, 7a, 7b...Data memory, 9...
Line data memory, 10... memory switch, 11... display control circuit, 12... oscillation circuit,
14a, 14b... Longitude frequency dividing circuit, 15a, 15
b...Latitude dividing circuit, 16...CRT display circuit,
21...Video control circuit, 23a, 23b...Map memory, 24, 25...Memory flash circuit, 26...Character generation circuit, 27...Pattern generation circuit, 32...Warning switch, 33...Warning detection Circuit, 35...Speaker, 36...Self-installed fault switch, 37...Self-installed range generation circuit.

Claims (1)

[Claims for Utility Model Registration] In an automatic position display device that displays images of the track and other information of a moving object on a display having a display screen using horizontal scanning and vertical scanning, a. a first memory that stores the obtained position signal as data in latitude and longitude (hereinafter referred to as absolute position); b. display of the absolute position corresponding to the own position of the mobile body obtained from the position signal; The first point is displayed on the display screen to display the track (hereinafter referred to as current track display).
track display means for providing a signal obtained by reading out the memory contents of the memory to the display; c) a second memory for storing map data for displaying a map corresponding to the current track display; d latitude and longitude line signal means for obtaining signals for displaying latitude lines and longitude lines corresponding to the current track display in synchronization with respective synchronization signals of the horizontal scanning and the vertical scanning; e. a plurality of different navigation devices; A display device comprising position signal selection means for obtaining the position signal by selecting any one of the signals obtained from the above.