JPH0228466Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a reflection detection device that displays a received signal obtained by reflection detection using radar, sonar, etc. on a color display in PPI. [Prior Art] This type of device has a configuration that displays the PPI by color-coding the received signal strength based on the signal obtained by identifying the received signal of the radar according to its strength.
11911 and others. Further, a configuration for classifying and displaying detected targets by identifying the continuity of a radar reception signal is disclosed in Japanese Patent Application Laid-Open No. 40091/1983.

[The problem that the idea aims to solve]

In the above-mentioned display that is color-coded according to intensity,
The target object can be identified by the difference in reflectance of the detection target, and in continuous gender sorting display, the target target can be identified by the difference in the size of the detection target. could be identified, and each was provided for a different purpose.

From the user's perspective, it would be extremely convenient if something were provided that had both of these functions and also allowed them to be used separately.

However, by simply combining both of these functions, it is difficult to tell which function state the current display screen is detecting by using a separate display that shows the position of the operating knob or the position of the control knob. The inconvenience of having to check each time is unavoidable.

For this reason, there is a problem in that it is desired to provide something that can be used to determine in which functional state the detection is being performed simply by looking at the display screen.

[Means to solve the problem]

The present invention provides a color-coded display based on the strength of received signals obtained by reflection detection such as radar or sonar, and a color-coded display based on the strength of the received signals. It is a reflection detection color display device that identifies and displays on a color display device, which displays the continuous gender in color according to the continuous gender signal obtained by the above-mentioned continuous gender identification, as well as a continuous gender color-coded display that displays the continuous gender in a color-coded manner. Continuity identification color means for displaying the gender color-coding display in a different color tone from the above-mentioned intensity color-coding display; switching for operating the above-mentioned intensity color-coding display and the continuous gender color-coding display in parallel; and the above-mentioned intensity color-coding display The above problem can be solved by providing a switching circuit having a switching circuit for operating the different color-coded display and the continuous color-coded display separately.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of the present invention, and in FIG. 1, an intensity-based identification circuit 7 has an intensity level identification circuit 7 similar to that of an A/D conversion means when a conventional received signal is used for color-coded display according to intensity. This is a circuit that identifies and outputs.

When the switching circuit 8 is connected to the position, it is color-coded by the intensity discrimination means, when it is connected to the position, it is color-coded by continuity discrimination, and when it is connected to the position, it is color-coded by the intensity discrimination means. This is a color-coded display in which both the sex identification means and the sex identification means are operated in parallel.

FIG. 2 is a block diagram showing only the operating circuit portion when the switching circuit 8 in FIG. 1 is switched to the operating state by the continuity identifying means.

In FIG. 2, the signal received by receiver 1 is
In radar or sonar, the signal is generally a polar coordinate signal, so it is converted to rectangular coordinates through a scan converter 2, etc., converted to a digital signal by an AD converter 3, and recorded in a storage device 4.

On the other hand, in synchronization with the scanning of the color display, records of the corresponding point and its surroundings are constantly read out from the storage device 4, the degree of continuity is checked in the continuity identification circuit 5, the corresponding color is determined, and the record is displayed on the color display 6. indicate.

FIG. 3 shows an example of the recorded contents of the storage device.

Here, the shaded area represents a recording of "1", ie, that a received signal was received, and the white area represents a recording of "0", that is, that there was no received signal.

A is a record corresponding to land, and B and C are records corresponding to a ship.

The means for identifying continuity in the continuity identifying circuit 5 uses the same means as the above-mentioned conventional technique, and the record as shown in FIG. 3 recorded in the storage device 4 is scanned by the display 6. It reads out and displays it sequentially from the left end according to the
When performing a display corresponding to a point, the continuity identification circuit 5
Now, sequentially read and count the records at point a in the storage device 4 and the records connected to it over a certain range to find out how many are consecutive. For example, if there are 8 or more consecutive, the color is brown, 4 to 4. Yellow if there are 7 in a row,
The color display 6 shows 3 or fewer pieces in red.
Display in .

Such a continuity identification circuit can be constructed using a computer or the like.

Therefore, when the record shown in FIG. 3 is displayed on the color display 6, the land area A is displayed in brown, and the ship areas B and C are displayed in red, so that the land area and the ship area are clearly separated.

The edge of the land near point b may turn yellow depending on the method used to identify continuity.

When displaying point a, it is ideal to check continuity in a certain area centered on point a, but
It is generally satisfactory to check the continuity of both or one of the columns and rows that include point a.

Now, if we read out the records in the storage device 4 sequentially from left to right in FIG. Gender identification can be configured relatively easily as shown in FIG.

In FIG. 4, signals read from the storage device 4 are sequentially input into an 8-bit shift register 51.

It is assumed that the signal is shifted to the right every time a new signal is read out, and is shifted out from the right end and disappears.

There are an 8-bit consecutive detection circuit 53 and a 4-bit consecutive detection circuit 52 connected to the output of each digit of the shift register 51, which detect 8 consecutive bits and 4 bits consecutively, respectively, and connect a flip-flop 55 for detecting 8 bits or more and a flip-flop for detecting 4 bits or more. 54
Set.

Furthermore, if the flip-flops 54 and 55 are reset when the right end of the shift register 51 becomes "0", the flip-flop 55 will be reset to 8.
When more than one bit of signal "1" continues, it is set and becomes "1" when the head reaches the right end of shift register 51, and when the continuous signal passes and the right end of shift register 51 becomes "0". It is reset to "0".

Similarly, when a continuous signal of 4 bits or more is received, the flip-flop 54 becomes "1" while the signal continues.

The rightmost outputs of the flip-flops 54 and 55 and the shift register 51 are put into a color-coded circuit 56 consisting of a simple AND circuit, and when 8 bits or more are consecutive, the output is from terminal B and brown is displayed.
Consecutive bits to 7 bits are output from the Y terminal and are displayed in yellow, and 3 bits or less are output from the R terminal.
The output from the terminal is displayed in red to identify continuity.

Two other examples of continuity identification circuits are shown in FIGS. 5 and 6.

The example in FIG. 5 is an example configured with a one-shot multivibrator, and the one-shot multivibrator 510 is triggered at the rising edge of the signal (T
terminal) outputs a pulse with a pulse width of, for example, 4 consecutive bits. If the signal becomes “0” during the process, the one-shot multivibrator 5
10 is reset and the pulse disappears. If the NOT output of the multivibrator 510 and the input signal are ANDed by the AND circuit 511, we get
This output becomes "1" when the input signal is 4 bits or more consecutively.

This detects 4 or more consecutive bits, but has the disadvantage that the first 4 bits are multiplied, but it has an extremely simple circuit configuration.

The example in FIG. 6 is an example composed of counters, where the counter 520 is an up-down counter,
It is assumed that a positive count is performed for a signal "1" and a negative count is performed for a signal "0".

Also, the maximum count value is, for example, up to "4",
It is assumed that even if the signal “1” is received any more, it remains at “4”, and the minimum count value is “0”.
Even if the signal "0" is received any more, it is assumed that the signal remains at "0".

When the counter 520 reaches "4", the flip-flop 521 is set, and when it reaches "0", it is reset.

In this way, when the signal "1" is substantially continuous for 4 bits or more, the output becomes "1", and when the signal "0" is substantially continuous for 4 bits or more after that, the output becomes "0".

In this case, the signal is integrated by a counter, so it is resistant to noise.

In the example shown in Fig. 2, the scan converter 2 converts the received signal from polar coordinates to rectangular coordinates, stores and displays it, but if the display scans radially or spirally from the center, the scan converter 2 It becomes unnecessary.

FIG. 7 shows an example in which the present invention is applied to a radar to perform the above operation, and the display device performs spiral scanning.

The received signal of the radar is a signal in a radial direction, and when it is input into a recording device and read out, it is read out in the direction perpendicular to the writing, that is, in the circumferential direction, and displayed on a spirally scanned display. In this example, the continuity of the signal in the radial direction before being written into the storage device and the continuity of the signal in the circumferential direction after being read from the storage device are distinguished.

That is, the signal from the receiver 1 is converted into a digital signal by the AD converter 3 and recorded in the storage device 4, and the continuity is checked by the radial direction continuity identification circuit 530 and stored in the storage circuit 410.

On the other hand, in synchronization with the spiral scanning of the display 6, the corresponding record is read out from the storage device 4, and the continuity is checked by the circumferential continuity identification circuit 540 and displayed on the color display 6.

Furthermore, the records in the storage device 410 are also read out in synchronization with the storage device 4 and displayed on the color display 6.

The color tone output from the radial continuity identification circuit 530 and the circumferential continuity identification circuit 540 may be the same color, or may be different colors.

Furthermore, the color may be changed when both overlap.

Further, in some cases, one of the identification circuits can be omitted.

The present invention allows the above-described means for color-coding and displaying received signals based on continuity identification and means for color-coding and color-displaying received signals according to intensity to operate in parallel, and also allows these to be operated separately. Continuity is identified when the received signal is at a certain intensity level or above, but when the intensity is below this level or below the set number of consecutive bits for continuity identification, It will be color coded according to intensity.

Then, by setting the color tone when the continuity is identified to be different from the color tone when the intensity is determined, the current display screen allows the intensity-based discrimination and the continuous gender discrimination to operate in parallel. whether it is operating only intensity-based discrimination or continuous gender discrimination.
This makes it easy to judge just by looking at the display screen.

The continuity identification circuit can be used in cases such as distinguishing between land and ships if it is identified in one stage, as illustrated in Figures 5 and 6, but if necessary, it can be identified in three stages as illustrated in Figure 4. Alternatively, the identification may be performed in more stages, and the number of consecutive bits may be determined as appropriate depending on the size of the object, the roughness of the screen, etc.

Further, the color tone may be appropriately selected so that the contrast object can be intuitively recognized.

[Effect of idea]

According to the present invention, as described above, the color-coded display based on intensity discrimination and the color-coded display based on continuity discrimination are displayed in different tones, and the color-coded display based on intensity and the display based on continuity discrimination are displayed in parallel. When activated, a composite color-coded display of these different tones is displayed, so you can judge just by looking at the color-coded state of the image displayed on the display screen, so it is not necessary to keep it dark at night. Even in a certain cabin, it is possible to accurately and easily determine at a glance which position the switching circuit 8 is switched to by checking each time.

Furthermore, since there is no need to provide an indicator or the like to indicate which identification state is in place, there is an advantage that the device can be provided in a small size and at low cost.

[Brief explanation of the drawing]

The drawings show an example. Fig. 1 is a block configuration diagram, Fig. 2 is an example of the configuration of a component that performs color-coded display based on continuity identification, Fig. 3 is an example of the recorded content of the storage device, and Fig. 4 is a continuous block diagram. An example of the configuration of the gender discrimination circuit,
FIGS. 5 and 6 show other configuration examples of the continuity identification circuit,
FIG. 7 shows a configuration example when the present invention is applied to a spiral scanning display radar. 1...Receiver, 2...Scan converter, 3...
...AD converter, 4...Storage device, 410...Storage circuit, 5...Continuity identification circuit, 51...Shift register, 52...4-bit continuity detection circuit, 53...
...8-bit continuous detection circuit, 54...Flip-flop for detecting 4 bits or more, 55...Flip-flop for detecting 8 bits or more, 56...Color-specific circuit, 510
...One-shot multi-vibrator, 511
...Logic product circuit, 520 ...Counter, 521
... Flip-flop, 530 ... Radial direction continuity identification circuit, 540 ... Circumferential direction continuity identification circuit, 6 ... Color display, A ... Record corresponding to land, B and C ... Corresponding to ship Record, a/b...
Recording point in storage device, 7... Intensity identification circuit, 8...
...Switching circuit.

Claims (1)

[Claims for Utility Model Registration] Received signals obtained by reflection detection using radar or sonar, etc. are identified by intensity and displayed in colors according to the intensity (hereinafter referred to as color-coded display by intensity). and a reflection detection color display device for identifying the continuity of the received signal and displaying it on a color display, comprising: (a) color-coded and displaying the continuity gender according to the continuity gender signal obtained by identifying the continuity; (hereinafter referred to as continuous gender color-coded display), and a continuity identification color means for displaying the continuous gender color-coded display in a different color tone from the intensity-based color-coded display; b. parallel to the intensity-based color-coded display and the continuous gender color-coded display; 1. A reflection detection color display device comprising: a switching circuit for operating the color-coded display according to intensity and a switch for operating the color-coded display according to intensity and the continuous color-coded display separately.