JPS6348485A - Scan converting device for radar - Google Patents

Scan converting device for radar

Info

Publication number
JPS6348485A
JPS6348485A JP61194236A JP19423686A JPS6348485A JP S6348485 A JPS6348485 A JP S6348485A JP 61194236 A JP61194236 A JP 61194236A JP 19423686 A JP19423686 A JP 19423686A JP S6348485 A JPS6348485 A JP S6348485A
Authority
JP
Japan
Prior art keywords
center
radar
frame memory
display
address generator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP61194236A
Other languages
Japanese (ja)
Inventor
Kenichi Oki
健一 大木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP61194236A priority Critical patent/JPS6348485A/en
Publication of JPS6348485A publication Critical patent/JPS6348485A/en
Pending legal-status Critical Current

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  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To vary an off-center quantity irrelevantly to the rotation of a radar and instantaneously to make a correct display by providing a frame memory larger than the display area of the radar and reading data in some area of the frame memory out according to the off-center quantity. CONSTITUTION:When the off-center quantity is 0, the center of the display area 14 meets the center of the frame memory 15 and a read address generator 7 generates addresses so that the display area 14 is cut from the frame memory 15. Then when a radar target 13 is displayed, the off-center quantity is varied and the address generator 7 generates cutting address so that the upper side of the frame memory 15 is the display area 14. This is equivalent to the addition or subtraction of a constant value to or from addresses by the address generator 7.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は走査変換装置のオフセンタ表示、すなわちレ
ーダースキャンの中心を表示装置の中心から移動し、よ
り広い領域を表示しようとする機能に関するものである
[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an off-center display of a scan conversion device, that is, a function of moving the center of a radar scan from the center of a display device to display a wider area. be.

〔従来の技術〕[Conventional technology]

第5図は従来の走査変換装置を示す構成図であり、図に
おいて、(11はレーダービデオ信号、(2)はレーダ
ー角度信号、(3)はオフセンタ量、(4)はA/1)
変換器、(5)は書込アドレス発生器、(61はフレー
ムメモリ、(7)は続出アドレス発生器、(8)はD/
A変換器、(91はTVビデオ信号、αCはTV同期信
号である。また第6.7図は従来のオフセンタ表示の原
理を示す原理図であり、(11)はスキャン中心、俣の
はレーダーターゲット、μ四は圓より遠方にあるレーダ
ーターゲラ)、(14)は表示装置の表示領域である。
FIG. 5 is a configuration diagram showing a conventional scan conversion device. In the figure, (11 is a radar video signal, (2) is a radar angle signal, (3) is an off-center amount, and (4) is A/1).
converter, (5) is a write address generator, (61 is a frame memory, (7) is a continuous address generator, (8) is a D/
A converter, (91 is the TV video signal, αC is the TV synchronization signal. Also, Figure 6.7 is a principle diagram showing the principle of conventional off-center display, (11) is the scan center, and the one in the middle is the radar (14) is the display area of the display device.

次に動作について説明する。レーダーからビデオ信号1
1+を受け、A/b変換器(4)でデジタル量へ変換し
これをフレームメモリ(61へ書込アドレス発生器+5
1のアドレス指定で書込む。書込アドレス発生器+51
では(2)の角度信号から極座標から直交座標への変換
をおこなってからフレームメモリアドレスを作成する。
Next, the operation will be explained. Video signal 1 from radar
1+ is received, converted into a digital quantity by the A/b converter (4), and written to the frame memory (61).Address generator +5
Write by specifying address 1. Write address generator +51
In step (2), the angle signal is converted from polar coordinates to orthogonal coordinates, and then a frame memory address is created.

このとき(3)のオフセンタ量にもとづき、レーダース
キャン中心を表示装置の中心から移動し、フレームメモ
リへの書込のアドレスをかえてオフセンタ表示を実現す
る。フレームメモリ(6)のデータは、続出アドレス発
生器(7)のアドレス指定で読み出され、D/A変換器
(8)でアナログ信号に変換され、TVビデオ信号(9
1としてTV同同期信号α色ともに表示装置へ送られる
。このようにしてレーダーのビデオはレーダ走査よりは
るかにすフレッシュレートの高いTV走査に変換され、
昼光下での視認が可能となる。
At this time, based on the off-center amount in (3), the center of the radar scan is moved from the center of the display device, and the address for writing to the frame memory is changed to realize off-center display. The data in the frame memory (6) is read out by addressing the successive address generator (7), is converted into an analog signal by the D/A converter (8), and is converted into an analog signal by the TV video signal (9).
1, both the TV synchronization signal α and the color are sent to the display device. In this way the radar video is converted to a TV scan with a much higher refresh rate than the radar scan.
Visibility under daylight is possible.

オフセンタ表示の原理を第6.7図で説明すると、第6
図は例えばオフセンタ量が0の場合で、側のレーダータ
ーゲットは表示されているが、遠方のレーダーターゲッ
トα階は表示されていない。
The principle of off-center display is explained in Figure 6.7.
The figure shows, for example, a case where the amount of off-center is 0, and the radar target on the side is displayed, but the distant radar target on the α floor is not displayed.

第7図のように一定のオフセンタ量を与えてαυのスキ
ャ〉中心を移動させ、両方のレーダーターゲットα2.
α9を表示することが可能である。これがオフセンタ表
示である。
As shown in FIG. 7, the center of the scan of αυ is moved by giving a certain amount of off-center, and both radar targets α2.
It is possible to display α9. This is an off-center display.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の走査変換装置は以上のように構成されているので
、オフセンタ量の変更をおこなう場合、レーダーが1回
転して(61のフレームメモリのデータをすべて更新す
るまで正常な表示は詔こなわれないという問題点があっ
た。
Conventional scan conversion devices are configured as described above, so when changing the off-center amount, normal display is not possible until the radar rotates once (all data in the 61 frame memories are updated). The problem was that there was no.

この発明は上記のような問題点を解消するためになされ
たもので、オフセンタ量の変更がレーダーの回転と無関
係におこなえて、瞬時に正しい表示を行なうことのでき
る走査変換装置を得ることを目的とする。
This invention was made to solve the above-mentioned problems, and its purpose is to provide a scan conversion device that can change the amount of off-center independently of the rotation of the radar and can instantly display the correct information. shall be.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る走査変換装置は、表示領域よシ大きなフ
レームメモリをもち、最大のオフセンタ量に対してもフ
レームメモリへの書込みではなく、読み出しでオフセン
タ表示をおこなうようにしたものである。
The scan converter according to the present invention has a frame memory larger than the display area, and performs off-center display by reading out rather than writing to the frame memory even for the maximum amount of off-center.

〔作用〕[Effect]

この発明に詔ける表示領域よシ大きなフレームメモリは
、(7)の読み出しアドレス発生器によりオフセ〉り量
に応じたアドレスのデータを読み出され、表示装置に表
示をおこなう。
In the frame memory larger than the display area according to the present invention, data at an address corresponding to the offset amount is read out by the read address generator (7) and displayed on the display device.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第1
図において、(1:はレーダービデオ信号、(2)はレ
ーダー角度信号、(31はオフセンタ量、(41はA/
D変換器、(51は書込アドレス発生器、(61はフレ
ームメモリ、(7)は続出アドレス発生器、(8)はD
/A変換器、(9)はTVビデオ信号、q9は゛rV同
期信号である。また第2図にこの実施例における表示領
域とフレームメモリの領域の関係を示す。
An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1: is a radar video signal, (2) is a radar angle signal, (31 is an off-center amount, (41 is an A/
D converter, (51 is write address generator, (61 is frame memory, (7) is successive address generator, (8) is D
/A converter, (9) is a TV video signal, and q9 is a rV synchronization signal. Further, FIG. 2 shows the relationship between the display area and the frame memory area in this embodiment.

次に動作について説明するっこの実施例ではオフセンタ
表示を読出しアドレス発生器(7)でおこなっている。
In this embodiment, the operation of which will be described next, off-center display is performed by the read address generator (7).

例えばオフセンタ量が0の場合、表示領域の中心とフレ
ームメモリの中心とが一致しておシ、読出しアドレス発
生器(7)では、フレームメモリから表示領域を切シ取
るようにアドレスを発生させていく。ここで第3図のよ
うに住りのレーダーターゲットは表示されているが、α
Jの遠方のレーダーターゲットは表示されていないもの
とする。
For example, if the off-center amount is 0, the center of the display area and the center of the frame memory are aligned, and the read address generator (7) generates an address to cut out the display area from the frame memory. go. Here, as shown in Figure 3, the radar target of the residence is displayed, but α
It is assumed that the distant radar target of J is not displayed.

しかし、C10のレーダーターゲットもフレームメモリ
の領域内にあり、データは書込まれている。次に(1′
5のレーダーターゲットを表示するようにするには、オ
フセンタ量を与えて読出しアドレス発生器で、もつとフ
レームメモリの上側を表示領域とするような切り取りの
アドレスを発生させる。これはアドレス発生器で、一定
の値をアドレスに加算又は減算することに相当する。ハ
ードウェア又はソフトウェアで簡単に実現可能である。
However, the C10 radar target is also within the frame memory area and data has been written. Then (1'
In order to display the radar target No. 5, an off-center amount is given and a read address generator generates an address for cutting so that the upper side of the frame memory becomes the display area. This corresponds to adding or subtracting a certain value to or from an address in an address generator. It can be easily realized with hardware or software.

第4図のようにqりとCL31のレーダーターゲットが
同時に表示される訳であるが、以上の処理を読み出しで
おこなっているため表示装置のリフレッシュレート(通
常数十分の1秒)で画面を更新でき、従来数秒〜数十秒
に比べ非常に高速である。
As shown in Figure 4, the radar targets of QRI and CL31 are displayed at the same time, but since the above processing is performed by reading, the screen is displayed at the refresh rate of the display device (usually a few tenths of a second). Updates can be made much faster than conventional methods, which take several seconds to tens of seconds.

また、上記実施例では走査変換装置の場合について説明
したが、メモリビットマツプ方式のディスプレイであっ
てもよく、非常に高速な縦、横両方向のスクロールが可
能となる。
Further, in the above embodiment, the case of a scan conversion device has been described, but a memory bitmap type display may also be used, and very high speed scrolling in both vertical and horizontal directions is possible.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によればオフセンタ表示方式を
フレームメモリの一部領域のデータ読出しでおこなった
ので、オフセンタ量の変更でおこなったので非常に高速
(100〜10000倍)におこなえ、オフセンタ時の
観測不能時間を無視できるまでに短くし、走査変換装置
の操作性を大幅に向上できる効果がちる。
As described above, according to the present invention, since the off-center display method is performed by reading data from a partial area of the frame memory, it is performed by changing the amount of off-center, so it can be performed at a very high speed (100 to 10,000 times), and when off-center This has the effect of shortening the unobservable time to a negligible value and greatly improving the operability of the scan conversion device.

【図面の簡単な説明】[Brief explanation of drawings]

第1図シまこの発明の一実施例による走査変換装置を示
す構成図、第2図はこの発明の実施例における表示領域
とフレームメモリの領域の関係を示す原理図、第3.4
図はこの発明の実施例におけるオフセンタ表示の゛原理
図、第5図は従来の走査変換装置を示す構成図、第6.
7図は従来の走査変換装置のオフセンタ表示の原理図で
ある。 図において、(1)はレーダビデオ信号、(2)はレー
ダ角度信号、(3)はオフセ〉り量、+41 、181
はA/D変換器、(5)は書込アドレス発生器、(61
はフレームメモリ、(7)は読出しアドレス発生器、+
91はTVビデオ信号、αOはTV同期信号である。 各図中の同一符号は同−又は相当部分を示す。
Fig. 1 is a block diagram showing a scan conversion device according to an embodiment of the present invention, Fig. 2 is a principle diagram showing the relationship between the display area and the frame memory area in the embodiment of the invention, and Fig. 3.4.
The figures are a principle diagram of off-center display in an embodiment of the present invention, FIG. 5 is a block diagram showing a conventional scan conversion device, and FIG.
FIG. 7 is a diagram showing the principle of off-center display in a conventional scan converter. In the figure, (1) is the radar video signal, (2) is the radar angle signal, and (3) is the offset amount, +41, 181
is an A/D converter, (5) is a write address generator, (61
is frame memory, (7) is read address generator, +
91 is a TV video signal, and αO is a TV synchronization signal. The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] レーダの表示領域より大きなフレームメモリをもち、こ
のフレームメモリの一部の領域のデータをオフセンタ量
に応じて読み出すことを特徴としたレーダの走査変換装
置。
1. A radar scan conversion device characterized by having a frame memory larger than a display area of the radar and reading data from a part of the frame memory according to an amount of off-center.
JP61194236A 1986-08-19 1986-08-19 Scan converting device for radar Pending JPS6348485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61194236A JPS6348485A (en) 1986-08-19 1986-08-19 Scan converting device for radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61194236A JPS6348485A (en) 1986-08-19 1986-08-19 Scan converting device for radar

Publications (1)

Publication Number Publication Date
JPS6348485A true JPS6348485A (en) 1988-03-01

Family

ID=16321237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61194236A Pending JPS6348485A (en) 1986-08-19 1986-08-19 Scan converting device for radar

Country Status (1)

Country Link
JP (1) JPS6348485A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527009A (en) * 1991-07-17 1993-02-05 Mitsubishi Electric Corp Display device
JP2007198906A (en) * 2006-01-26 2007-08-09 Japan Radio Co Ltd Display

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527009A (en) * 1991-07-17 1993-02-05 Mitsubishi Electric Corp Display device
JP2007198906A (en) * 2006-01-26 2007-08-09 Japan Radio Co Ltd Display

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