JPH0236087Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides an image receiving device at the output end of the navigation equipment, that is, a display whose display screen is scanned by horizontal scanning and vertical scanning, such as a cathode ray tube (hereinafter referred to as a cathode ray tube) such as a CRT display device. ), and draw a map, circles, lines, etc. on the surface of this CRT, and from the relationship with this map, etc., you can display the position of a mobile object equipped with navigation equipment moving on the sea or land, or indicate a warning position. This invention relates to an automatic position display device that allows users to know their location.

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, which 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. There is a drawback that it requires a lot of time, and it is not possible for anyone to quickly and easily determine the direction of radio waves or the position of their own moving object, and it is difficult to know how to read a map or conversion table or how to calculate it. Limited to those who are present. 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 inspectors to carry out monitoring, the personnel costs were considerable.

The present invention was developed to eliminate the above-mentioned drawbacks, and by simply connecting it to ordinary navigation equipment, it is possible to clearly determine the position, direction of movement, and dangerous situation of a moving object equipped with the equipment. The present invention provides an automatic position display device that enables

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 1, 1a, 1b, etc. are navigation equipment that is installed 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 output as a digital data signal on the output side. An A-D conversion circuit 2 is connected thereto. If the digital data signal is directly output from the navigation equipment 1a, 1b...
The D conversion circuit 2 is not required. 3 is device switching circuit 4
which navigation equipment 1a, 1b by the address signal of
This is a data selector circuit that determines whether to use data signals. The data signal output from this circuit 3 is supplied to a microcomputer or the like 6 (hereinafter referred to as a computer) via a subsequent input/output control circuit 5. Incidentally, the input/output control circuit 5 receives error correction data such as date, month, time, etc. that cannot be avoided in the navigation equipment 1a, 1b, etc. from a clock device (not shown).
This computer 6 is an input/output control circuit 5
It is determined whether or not the data signal has been converted into latitude and longitude, and if it has been converted, it is passed through as is, and if it has not been converted, it is passed through the navigation equipment 1.
In order to convert the output signals of a, 1b, . . The computer 6 also includes a gyro compass obtained through the input/output control circuit 5;
The moving direction of a moving object is calculated using data such as an agnetic compass. 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 of 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 (vertical synchronization signal) of the CRT display circuit 16 to generate a longitude line signal. . Similarly, the latitude frequency dividing circuits 15a, 15b... divide the output signal of the oscillation circuit 12, and synchronize with the horizontal synchronization signal H.SYNC (horizontal synchronization signal) of the CRT display circuit 16 to generate a latitude line signal. . These longitude frequency dividing circuits 14a, 14b... and latitude frequency dividing circuits 15a, 15
b... are individually switched by switches 17 and 18 to sequentially change the longitude line signal and the latitude line signal. Moreover, these switches 1
7 and 18 are designed to be switched in conjunction with a map changeover switch 19 that follows. Reference numeral 20 denotes a coincidence circuit that outputs a coincidence signal of a longitude 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 outputted 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/lighting switch. In other words, the characters, numbers, and
Symbols, etc. are put into the video control circuit 21 through the multi-circuit 28 so that they can be displayed blinking, and the switch 2
9 is closed and the switch 29 is turned on to enable lighting display. 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 warning means, 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 includes the unavoidable days, months, and days of navigation equipment 1a, 1b...
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..., it may be necessary to capture two different radio waves to determine the position, so in such cases, the previously measured value is stored in the memory circuit of the computer 6. , is executed only when another measurement value is input. In addition, when performing coordinate transformation, the data from the data selector circuit 3 is transferred to the computer 6.
The coordinate points are read and stored one by one while addressing the necessary data in the data memories 7a, 7b, . . . Furthermore, when measuring the arrival direction of radio waves by moving the receiving direction of the navigation equipment 1a, 1b... without moving, the navigation equipment 1a, 1b...
The reference pulse is generated based on the zero degree of ..., but in the case of a cathode ray tube display method or a meter display method, an oscillation circuit 1 with a phase difference of 90° is used.
2, so we use this to convert the analog signal into digital and create a reference zero pulse. If the navigation equipment 1a, 1b, etc. are digitally displayed, the signals are used as they are. An incoming radio wave is received using the reference pulse obtained in this manner, 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 peakon band is the main source of normally arriving radio waves that indicates one's own position, and transmitting stations in this frequency band have their own code (for example, an alphanumeric code), and constantly transmit that code to determine their own position. , so the code 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
A 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, etc. 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. Space, vertical blank (digit space)
It has a shape that 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 based on address designation to create a single map. The shape of this map is determined by the map memory 23a,
24b, . . .

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 a ROM board, and an address signal is applied to sequentially extract the patterns, etc., and combined to create a one-sided 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, horizontal
A method of mixing the vertical synchronization signal and video signal with a mixer circuit and supplying it to the cathode ray tube.
There is a method of modulating the high frequency with an RF modulation circuit and inputting it through the antenna of the television receiver.

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 the 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 generating 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 if 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.

[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, 9...Line data memory, 7a,
7b...data memory, 10...memory switch, 11...display control circuit, 12...oscillator circuit,
16... CRT display circuit, 14a, 14b... Longitude frequency dividing circuit, 15a, 15b... Latitude frequency dividing circuit,
21... Video control circuit, 26... Character generation circuit, 27... Pattern generation circuit, 32... Warning switch, 23a, 23b... Map memory, 24, 25
...Memory flash circuit, 33...Warning detection circuit, 35...Speaker, 36...Self-installed fault switch, 37...Self-installed range generation circuit.

Claims (1)

[Scope of utility model registration request] Navigation equipment is mounted on a mobile body at sea or land and outputs a signal based on its own position, and the signal from this navigation equipment is converted into latitude and longitude by taking in the necessary data from memory, compass, etc. (if latitude and longitude conversion is not performed) or coordinate conversion,
A data processing section that determines the deviation of incoming radio waves and converts it into position data, and a frequency dividing circuit of the oscillation circuit that divides the frequency and
means for obtaining latitude line and longitude line signals to be applied to the cathode ray tube in synchronization with the horizontal and vertical synchronizing signals of the CRT display circuit; a display control circuit that supplies position data to the CRT display circuit; and a display control circuit that stores patterns of characters, numbers, maps, lines, etc.
A character/pattern generation circuit generates a combination pattern that can be displayed on a cathode ray tube based on the position data and map data of the display circuit, and the display control circuit extracts circle or line data from the self-placement range generation circuit. An automatic position display device comprising means for determining a dangerous state of the movable body by associating signals of the position pattern and generating a warning.