JPS5931464A - Sweeping and electronic cursor device of radar - Google Patents

Abstract

PURPOSE:To realize a small-sized and high reliability device capable of generating a sweep signal and an electronic cursor signal, by counting pulses generated corresponding to the specified direction of a radar by an azimuth counter, and obtaining a sine and a cosine values corresponding to the azimuth. CONSTITUTION:Pulses in a transmission and reception part 34 are radiated through a radar antenna 16, and the reflected wave is supplied to a radar display signal processing part 35, and to which such as a heading azimuth signal is applied, and supplied to a display device 27 as a radar display composite signal. For example, 3,600 azimuth pulses are generated in one rotation of the antenna 16 and counted by the counter 38. A selector 39 switches the contents of the counter 38 and a cursor counter 42 and supplies them to a sine and cosine conversion part 57. The output sine and cosine values of the conversion part 57 are supplied with D/A-conversion 58 and 59, respectively, to generate 61 and 62 saw-tooth wave signals having the amplitudes of the sine and cosine values, and those signals are supplied to the deflecting means 28 of the display device 27.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a restraint and 71Y child cursor device for generating a so-called cursor signal at an arbitrary angle jυ force direction when a shield in a PPI radar device is generated.

In the PPT display radar, as shown in FIG.
2 are sequentially formed, shifted by 1 blf, for example, so as to scan the entire pi plane. A reflective object or image 14 is formed. The distance and direction of the reflecting object a)'l is determined from the distance from the center 13 to the reflection f914 and the angle with respect to the reference direction on the display screen.

In order to correctly navigate the direction of the 420 reflected bodies, the center 13
, generate the electronic cursor 15 in the direction of Q, align the electronic cursor 15 in the direction of the reflective object, and then press the ? [By reading the set angle of the single child cursor 15, it can be read quickly and correctly.

In order to generate such electronic cursor 15 and scanning line 12, conventionally, for example, as shown in FIG. 15 drives the resolver 18, and each two outputs of the resolver 18 are converted into a DC signal by the AC/DC converter 21-22, and the sweep 1. i generator 25
．． 26. This swept bT signal generator 25.2
6 sweep signals are supplied to the two-phase coil 28 of the radar display 27, and the radial scanning line 12 shown in FIG. 1 is sequentially formed.

': In order to obtain the F child cursor 15, a cursor resolver 29 is provided, and this resolver 29 is operated by the operation knob 31.
The two outputs of the resolver 29 are converted into DC signals by the AC/DC converters 32 and 33, and the switch 23
．． At 24, it is switched to the output corresponding to the antenna orientation resolver 18 and supplied to sweep signal generators 25 and 26. When the switches 23 and 24 are switched to the output of the cursor resolver 29, the corresponding sweep is unblanked as a bright line on the display surface of the display tube 27, and the electronic cursor 15 is displayed.

The switches 23 and 24 are switched to the cursor resolver side, for example, once every multiple times of the scanning line 12.

Conventionally, in order to display the electronic cursor 15, a cursor resolver 29 is used. There were some drawbacks.

The object of the present invention is to generate a sweep signal in a compact and reliable manner and to generate 'i1? Radar sweep and can generate child cursor signals? (? Provides a child cursor device.

According to this invention, in order to generate a sweep signal, pulses generated corresponding to the pointing direction of the radar are counted by an azimuth counter, and the content of this azimuth counter is converted into the azimuth of the count 1+/4 by a sine/cosine converter. What are the corresponding sine and cosine values? U
, a sweep signal having an amplitude corresponding to the sine value and cosine i1^ is generated, and these sweep signals are supplied as a deflection signal to a radar display having a two-phase deflection means. On the other hand, when the cursor 1 for the Ichiko cursor is operated by the operation means so that the direction of the electronic cursor advances or rotates in the opposite direction, an advance pulse or a backward pulse is generated. The leading pulses are counted up by the cursor counter, and the backward pulses are counted down by the cursor counter. This cursor counter is periodically switched with respect to the previous azimuth counter and is supplied to one part of the sine, nasa, etc. Therefore, when the value of this cursor counter reaches 7 and is supplied to the string/cosine converter, an electronic cursor appears on the radar display.

FIG. 3 shows an example of an electronic cursor according to the present invention. The pointing direction of the radar antenna 16 is rotated by a motor 17, and the transmission/reception unit 34 of the radar antenna 16 transmits (1)
One pulse is emitted, and the reflected wave is received and detected by the transmitting/receiving section 34 and sent to the radar display (iJ processing section 35. Although not shown in the figure, the radar signal processing section 35 adds a heading signal etc. The radar display composite signal is used to modulate the brightness of the display surface of the radar display 27, in this example a CRT display.

A pulse generator 36 is driven by the motor 17 and generates, for example, 3,600 pulses per rotation of the antenna 16. This azimuth pulse is shaped by a waveform shaping circuit 37 and sent to an azimuth counter 38. Ru. This counter 38 is, for example, a 12-bit counter, and its iY location f1111 is supplied to the selector 39.

On the other hand, when the cursor T' It is formed. In this case, each time the operator 41 is operated, the cursor 71 is rotated forward or backward by a predetermined angle IΩ°, and the terminal U is further rotated.

This is a case in which if the operator is left connected to one side of D, the electronic cursor advances continuously in that direction, and the advancing speed becomes faster as time passes.

For this reason, the movable element of the 1V switch 41 is grounded, and the terminal IJ or D side is connected to the input side of the OR circuit 45 through chattering prevention circuits 43 and 44, respectively. ing. Depending on the output 1 of the OR circuit 46, the frequency dividing circuit 4
6 is cleared. For example l-! ) Y・Electronic 41
:ii When the J side terminal U is input (〆', H&j, +), a high level is input to the input side of the OR circuit 45, its output becomes a low level, and the clearing of the frequency dividing circuit 46 is canceled.

Therefore, the frequency dividing circuit 46 has a frequency of 80Hz from the terminal 47.
, and the frequency divided by 16 in the frequency dividing circuit 46 is supplied to the AND gate 48.
Ru. In other words, 04 seconds after the clear voltage of the frequency divider circuit 46 is divided by I.C, the output of the AND gate 481 is generated, and the counter 49 starts counting the 5 Hz clock to the output of the AND circuit 48. Depending on the four number states of 49, the selector 51 selects one of its input clocks.

For example, as shown in FIG.
0 Hz or yellow is selected, and 1.6 seconds after clearing, 80 Hz at terminal 47 becomes i1! ; Interpreted, clear 2
After 4 seconds, 320Hz from terminal 52 is selected,
When 28 seconds and 4 passed from the clear, tlllfllll Saiko's 640 fTz was selected. The clock selected in this way is supplied to the gate 54.55, and is connected to the 1ij leading side terminal U!J! , "1 goes through the gate 54 and connects to the reverse side!'+11. 1) Input terminals A and B.

C all become high level, this is detected, the AND circuit 48 is closed, and the counting of the counter 49 is stopped. Therefore, 640 H2 from the terminal 53 continues to be output. For example, when a clock of 40H2 is supplied, the j3 child cursor rotates 4.8 degrees between "111", 641γ rotation during a period when 80 FIz is supplied, and 128 degrees during a period when 320Hz is supplied. , set the controller 41 to 4? If you leave it on, the cursor will rotate faster.

The selector 39 is connected to the switching signal circuit 561 (9j)
The selector 39 switches the contents of the azimuth counter 38 and the cursor counter 42 and converts the end cosine converter 5.
01 salary on 7th. Sine, cosine 4chi ↓m (57 is the human power, and the antenna corresponding to the 11° mouth)
It outputs the sine value and cosine value corresponding to the azimuth angle in the l^1 direction, and can be configured with a read-only memory, for example. Ru(9 parts 57 output sine &+, remainder 4j
i is (analog 1 by t1DA converter 58.59
It is converted to No. 3, and further 1. j) Pull signal generator 61. fi
2), sweep signal generators 51, 62) etc.
Sanri Gename, sawtooth wave with amplitude of cosine value f11 force ≦ 1t, sono saw r! :+'+r'gr If593
Ha'A< 11・+! The additional wheel shaft circuit 63.64m (+f) is supplied to the deflection means 28 of the indicator 27.

Like this 11. The counter 38 counts (i) as the antenna orientation direction advances.
+"i steps forward, and each time the count content corresponds to the azimuth angle in the direction of the antenna finger [t11, a sawtooth ηji signal with the amplitude 111fri of the sine value and cosine value is created,
The length of the sawtooth signal corresponds to the scanning time of the scanning line 12 of the display, and the scanning line 12 as shown in FIG. It is formed without being oriented in that direction, so a radial scan is performed. For example, the selector 39 switches the culm degree λ once every 10 times.
During this time, the sine value and cosine value according to the contents set in the cursor force outputter 42 are generated. is the signal processing circuit 35
Also (If, please put 'ih child cursor 1 on display 27.
il so that 5 appears, that is, brightness occurs.
l: To be lj'l. Therefore, the electronic car is set to 15 or 11 in the direction corresponding to the argument content of the cursor counter 42.
) to be destroyed. To change the direction of this 1' (r child cursor 15), the angle can be advanced or delayed by making the operator 41 by 7%, and in this example, the angle can be changed significantly. L) j14. If the operator is held down, the rotation speed IQ of the electronic cursor becomes faster, and therefore the electronic cursor becomes thicker (can be easily changed).This cursor counter 42
The penetration 1f value is converted into a binary coded decimal number by the conversion unit 65,
It is displayed on the display 66 as an azimuth angle.

As described above, according to the sweep and electronic cursor LQ If"t according to the present invention, it is possible to generate "iJ, i-child cursor transmissions" purely electronically without providing a resolver for electronic cursors as in the past. , such a circuit is I
By converting it to C, it can be constructed to be extremely compact and highly reliable. Moreover, as shown in the previous example, in order to use the electronic circuit, if you push the electrons to the +jf advance side or to the sewing forward side, the rotation speed of the electronic cursor will increase. It is easy to configure and works well as a 76-child cursor.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the display rlj11 of the radar display for explaining the year child cursor; FIG. 4 is a block diagram showing an example of a sweep and rectangular cursor device, and FIG. 4 is a diagram showing an example of a change in clock frequency when the cursor operation is continued. : Motor, 15: Electronic cursor,
12: Scanning line, 27: Display device, 28: Deflection means, 38:
Azimuth counter, 41; Cursor (1 - electron, 42: Cursor counter, 39; Selector, 57: Sine, cosine converter, 58, 59: AD converter, 6], 62: Sweep signal generator, 56: 177 Replacement generator. Patent applicant Hikari'ichi Seisakusho Co., Ltd. Agent Kusano
It's a table! > Ikei d Procedural Kamichisho (spontaneous) December 17, 1981 [1 Commissioner of the Patent Office, 1,! Displaying 1t- items Tokuwa 111ff57 141
81. Name of the invention Relation to tenant ownership of radar sweep and electronic cursor device Target of the detailed description of the invention in the specification and column 6 of the brief description of the drawings, contents of amendment (1) "Motor 15" in lines 2-3 on page 3 of the specification is corrected to "motor 17" . (2) Same book, page 10, line 6 [Cursor counter 42]
It overlaps directly with the cursor counter 42-1. (3) Correct ``A1) converter'' in line 12 of the same book to ``1) A converter''. [Procedure Sleeves]) - (Spontaneous) July 1982 251-1 Mr. Yu, Director of the Patent Office 1, Indication of Tenancy! l'4i 17H (H 57-1
4.181, Title of the invention L/-da sweep and electronic cursor device: 1 difference from the person who corrects the error. 19-chome 4 Agent 4-2-21 Kakujuku 14 Shinjuku, Tokyo
, I'la building 5 sleeves 11 contracts) Karu! th deficiency light pii
Details of the invention in the lap (+1 twilight 11 d (j, contents of the oil stop (1) page 4 line 16 of the specification "counter at number")
``Count with a counter'' and i\]''+l-. (2) Change ``cursor counter'' to
Cursor counter" and hard IF.

Claims (1)

[Claims] (1) An azimuth counter that counts azimuth pulses generated each time the pointing direction of the radar antenna rotates by a unit angle, and an azimuth counter that counts azimuth pulses generated each time the pointing direction of the radar antenna rotates by a unit angle, and a azimuth pulse that generates an advance pulse or a retreat pulse that corresponds to the advancing direction of the cursor in response to the operation of the operator. A horn operating means for outputting, a cursor counter that counts up the kneading when the advance pulse is not given, and counts down the kneading when the backward pulse is given, and the counting contents of the direction counter and the cursor counter. A selector to select, a sine and cosine conversion section that outputs the sine and cosine values of the azimuth corresponding to the output of the selector, and a +P, value) and cosine values each having a width of 414, first and second sweep signal generators that generate first and second sweep signals, and these first and second sweep signals are sent to the two-phase sweep means. A radar sweep and electronic cursor equipped with a radar display that sweeps the display screen in a radial manner.
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