JPS6246361Y2 - - Google Patents

Description

[Detailed description of the invention] This invention receives, by facsimile, track image information from a track display device that is connected to a Loran receiver and displays the moving position of a moving object, that is, the track as well as the latitude and longitude of the vicinity. The idea is to convert image signals so that they can be received and recorded by a receiver.

For example, as shown in Japanese Patent Laid-Open No. 56-31602, a track display device displays position information, latitude, and longitude information received from a Loran receiver on a display screen of a scanning type display such as a cathode ray tube display. Track image information corresponding to each pixel above is stored in a memory, and the memory is read out in synchronization with the scanning display to display latitude and longitude lines on the display screen of the display. A device that displays the wake of a moving object is known. However, although this track display device displayed information, it did not have a means for recording.

This invention provides a conversion device for converting track image information into facsimile signals so that images displayed on conventional track display devices can be recorded by existing facsimile receivers.

The track image signal conversion device according to this invention will be explained below with reference to the drawings. Reference numeral 11 in FIG. 1 indicates a track display device, in which a scanning display 12 such as a cathode ray tube display is provided, and a track image is displayed corresponding to each pixel of the display screen. Information is stored in memory 13. By reading out the memory 13 in synchronization with the scanning of the display screen of the display device 12, the trajectory of the movement of the moving object is displayed on the display screen 14 of the display device 12 along with latitude lines 15 and longitude lines 16, as shown in FIG. A so-called wake 17 is displayed. Therefore, the information in the memory 13 is converted and stored in the memory 13 so that every time position information of a moving object is obtained from a navigation receiving device such as a Loran receiver, the position information is recorded at a corresponding position on the display screen. Contents can be rewritten.

This invention transmits the track image information obtained in the track display device 11 to the facsimile receiver 1.
This converts the facsimile signal into a facsimile signal for recording.

In this invention, a facsimile synchronization signal corresponding to the facsimile receiver is sent from the terminal 21 of the reference signal generator 19. In response to this synchronization signal, the track display device 11 outputs 1 track image information.
Only the scanning line is taken out and stored in the memory 22. Since the number of scanning lines of the display image on the track display device 11 is generally about half the number of pixels of the scanning line, the facsimile signal is created by converting the image signal on one scanning line on the track display device 11 into two scans. This is a case where it is processed as a line image signal.

Therefore, the frequency of the facsimile synchronization signal from the terminal 21 is divided by half by the frequency divider 20, and the frequency-divided synchronization signal is sent to the facsimile scanning counter 23.
given to. The reset of the scanning counter 23 is canceled by the operation start signal from the terminal 24.
On the other hand, the terminal 25 of the indicator 12 of the track display device 11,
A plane synchronization signal and a line synchronization signal are respectively taken out from 26, and these are sent to the scanning line counter 2 for displaying the track.
7 is input. The scanning line counter 27 is reset by the surface synchronization signal and counts the line synchronization signal at the terminal 26. The count values of the scanning counters 23 and 27 are provided to a coincidence detection circuit 28 to detect coincidence between the two.

In this way, when a corresponding scanning line in the track display device is detected for one scanning line of the facsimile signal, track image information for that scanning line is stored in the memory 22 for one scanning line.
Therefore, when a match is detected in the match detection circuit 28, the match detection signal is input to the control circuit 29. The control circuit 29 receives the coincidence detection signal and updates the address of the address generation circuit 31. A clock corresponding to the scanning of each pixel of the scanning type display is input from the terminal 32 of the track display device 11 to the control circuit 29, and in this example, the track image information is stored in the memory 22 every 8 bits. In this case, the track image information read out from the memory 13 of the track display device 11 is input to the serial/parallel converter circuit 34 through the terminal 33, where it is converted into 8-bit parallel information, which is then latched. 35, and the 8-bit parallel information is written into the memory 22 with the address specified by the address signal from the address generation circuit 31. The address of address generation circuit 31 is incremented each time this bit is written. In this way 8
Track image information for one scanning line is written to the memory 22 in the form of bit parallel information.

When the writing is completed, the memory 22 is almost continuously read between the next two facsimile synchronization signals.
is read out. That is, when the writing to the memory 22 is completed and the current facsimile synchronization signal ends, the memory 22 enters the read state, the address of the address generator 31 is also reset to the initial state at the time of writing, and the clock of the facsimile signal is set to the reference generation circuit. The signal is applied to the control circuit 29 from the terminal 36 of 19. From this, reading from the memory 22 is performed in synchronization with the clock of this facsimile signal, and the read information is converted into a serial signal by the parallel-to-serial conversion circuit 37 and supplied to the combining circuit 38.
In the synthesis circuit 38, it is synthesized with the facsimile synchronization signal from the terminal 21 to obtain a facsimile signal,
It is sent to the facsimile receiver 18 from the output terminal 39.

For example, as shown in FIG. 3, when the activation signal is applied to the terminal 24 at time _t1 and becomes low level, the facsimile scanning counter 23 is reset and the output of the frequency divider 20 is counted from this. As shown in FIG. 3B, the synchronization signal at terminal 11 has a period T ₁ of, for example,
0.5 seconds, and the width T ₂ of the synchronization signal is selected to be 17 milliseconds or more, that is, slightly longer than the surface scanning period of the display 12 in the track display device 11 . Therefore, during one facsimile synchronization signal, all scanning lines on the display 12 are always 1.
times occur. This facsimile synchronization signal is also given to the coincidence detection circuit 28, and when a coincidence is detected in the coincidence detection circuit 28, that is, when the counter 23 counts 1 with the first facsimile synchronization signal, the display 12 The track display scanning line counter 27 is 1 at the first scanning line of
When counted, the coincidence detection circuit 28 generates a coincidence detection signal as shown in FIG. 3C.

The period of this coincidence detection signal is set to be the same as the period of one scanning line of the display 12. This period coincides with the period during which the information for the first scanning line in the track image information is read out from the memory 13, and the track image information for that one scanning line is stored in the memory 22. When this storage is completed, the track image information for the first scanning line is read out almost continuously (uniformly) from the memory 22 during the period _T8 from the trailing edge of the current facsimile synchronization signal to the next facsimile synchronization signal. Ru. This readout is performed at such a speed that the trail image signal for one scanning line fills the period _T8 almost uniformly. The facsimile signal clock period at terminal 36 is selected accordingly.

In this example, as mentioned earlier, the facsimile synchronization signal is supplied to the facsimile scanning line counter 23 once every two times, so when writing to the memory 22 is completed, the memory 22 starts from the trailing edge of the facsimile synchronization signal is read out, and the same information is read out again from the memory 22 from the trailing edge of the next facsimile synchronization signal. When two readings are completed in this manner, the facsimile scanning line counter 23 is incremented by one. Therefore, image information corresponding to the second scanning line in the track image information is written into the memory 22 during the period of the third facsimile synchronization signal. This is read out twice in the same manner as described above. The same process is repeated below.

In this manner, a facsimile signal is generated, and therefore, when the facsimile signal at the terminal 39 is supplied to the facsimile receiver 18, the displayed image on the display screen of the track display device is recorded in the facsimile receiver. Note that the terminal 41 of the control circuit 29 is connected to the memory 22.
This is a synchronous control signal terminal for.

In the control circuit 29, for example, as shown in FIG.
The gates 43 and 44 are supplied with a coincidence signal from the coincidence detection circuit 28, that is, the signal shown in FIG. 3C, and are controlled in opposite ways. The outputs of these gates 43 and 44 are given to the address counter 31 through the OR gate 45, and each time this clock is input, the address counter 31 is incremented, and the output of the coincidence detection circuit 28 and the facsimile synchronization signal of the terminal 21 are incremented. The mismatch with circuit 4
7 and the address counter 31 is reset during the mismatch. In other words, in FIG. 3, during the synchronization signal period _T2 , the portion excluding the coincidence detection signal in FIG. 3C is the address counter 31.
is reset. The output of the coincidence detection circuit 28 is applied to the read/write control terminal of the memory 22 at a terminal 41, and is kept in the write state only while the coincidence detection signal is obtained. Further, while the output of the serial-to-parallel conversion circuit 35 is provided with a coincidence detection signal, the output is supplied to the memory 22, but in a state where no coincidence detection signal is obtained, the output of the serial-to-parallel conversion circuit 35 is in a high impedance state. The data read out from the memory 22 is supplied to the parallel-to-serial conversion circuit 37. In this way, writing and reading from the memory 22 are performed sequentially starting from the same address. Note that when a memory that operates at high speed is used as the memory 22, the serial-to-parallel conversion circuit 35 and the parallel-to-serial conversion circuit 37 are omitted, and the data is directly written to the memory 22 and the read data is directly supplied to the synthesis circuit 38. Good too.

As described above, according to the track image signal converting device according to this invention, the display image signal of the track display device can be converted into a facsimile signal and recorded in a facsimile receiver. Therefore, it becomes possible to save the navigation state of the mobile object as a so-called hard copy and view the record later if necessary.
Furthermore, as in the previous embodiment, the number of scanning lines of the track display device may be generally small, and in this case, the track image can be easily seen as a recorded facsimile image by repeating the same scanning line image information multiple times as in this example. can be taken as a thing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a track image signal conversion device according to this invention, FIG. 2 is a diagram showing an example of a display image of a track display device, and FIG. 3 is a block diagram showing an example of the display image of the track display device. The waveform diagram in FIG. 4 is a block diagram showing an example of the control circuit 29 in FIG. 11: Track display device, 12: Scanning display device, 1
3: Track information memory, 18: Facsimile receiver, 19: Reference generator for facsimile synchronization signal generation, 21: Facsimile synchronization signal output terminal, 2
3: Facsimile scanning line counter, 27: Track image scanning line counter, 28: Coincidence detection circuit, 2
9: control circuit, 22: memory, 31: address counter, 38: synthesis circuit.

Claims (1)

[Scope of utility model registration request] The memory in which the track image information is stored is read out and supplied to the scanning display, and the display image of the track display device that displays the latitude, longitude, and mobile object position information on the display screen is recorded as an image on the facsimile receiver. A track image signal converting device for the purpose of the present invention, comprising a synchronizing signal generating means for generating a synchronizing signal of a facsimile signal, and extracting the corresponding one scanning line of the track image information from the track display device in synchronization with the synchronizing signal. a memory for storing one scanning line of track image information stored in the memory, a means for continuously reading out one scanning line worth of track image information stored in the memory between adjacent synchronization signals of the facsimile, and a means for reading out track image information for one scanning line stored in the memory between adjacent synchronization signals of the facsimile; A track image signal converting device comprising: a synthesizing means for synthesizing the facsimile signals to obtain a facsimile signal.