JPH0421827B2 - - Google Patents
Info
- Publication number
- JPH0421827B2 JPH0421827B2 JP6356282A JP6356282A JPH0421827B2 JP H0421827 B2 JPH0421827 B2 JP H0421827B2 JP 6356282 A JP6356282 A JP 6356282A JP 6356282 A JP6356282 A JP 6356282A JP H0421827 B2 JPH0421827 B2 JP H0421827B2
- Authority
- JP
- Japan
- Prior art keywords
- azimuth
- waveform data
- display
- cursor
- line
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は到来電波の方位を測定する装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device for measuring the direction of incoming radio waves.
従来、到来電波の方位を測定するにはゴニオメ
ータの出力信号を受信機で復調し、この復調出力
信号を表示器に表示して操作者が方位を決定して
いた。即ち、受信機から出力される方位波形は例
えば第１図に一点破線１１で示すような信号とな
されており、この信号はアナログ／デイジタル変
換回路に供給されて所定方位角毎に量子化され
る。この量子化された信号は第１図に示す如く方
位角に対応した方位波形データ１２として表示器
上に表示される。また、このとき方位波形データ
１２が容易に目視可能となるよう方位波形データ
１２の電波到来方向に位置する部分（図示点線の
円印で示す部分）が数倍に拡大されて表示され
る。このとき方位波形データ１２の図示右側に拡
大率に対応した個数の同一レベルのデータが同時
に表示され、各方位波形データ１２自体も拡大表
示される。この方位波形データ１２は操作者によ
り表示器上で目視され、方位波形の最低レベルに
対応する方位角Ｄが読取られて電波の到来方向が
測定される。したがつて、このような従来の方法
では最終的な方位測定を操作者の目測に頼つてい
るため、混信等で信号の質が悪い場合には測定誤
差が大きく、また、迅速な測定を行なうことが困
難であるなどの欠点を有している。
Conventionally, in order to measure the direction of incoming radio waves, the output signal of a goniometer is demodulated by a receiver, and this demodulated output signal is displayed on a display so that an operator can determine the direction. That is, the azimuth waveform output from the receiver is, for example, a signal as shown by the dashed line 11 in FIG. 1, and this signal is supplied to an analog/digital conversion circuit and quantized for each predetermined azimuth angle. . This quantized signal is displayed on the display as azimuth waveform data 12 corresponding to the azimuth, as shown in FIG. Further, at this time, a portion of the azimuth waveform data 12 located in the radio wave arrival direction (the portion indicated by a dotted circle in the figure) is displayed enlarged several times so that the azimuth waveform data 12 can be easily viewed. At this time, on the right side of the azimuth waveform data 12 in the figure, a number of data of the same level corresponding to the magnification ratio are displayed simultaneously, and each azimuth waveform data 12 itself is also displayed in an enlarged manner. This azimuth waveform data 12 is visually viewed by the operator on a display, and the azimuth angle D corresponding to the lowest level of the azimuth waveform is read to measure the arrival direction of the radio wave. Therefore, these conventional methods rely on the operator's visual measurement for the final direction measurement, which can lead to large measurement errors if the signal quality is poor due to interference, etc., and it is difficult to perform quick measurements. It has the disadvantage that it is difficult to
この発明は上記事情に基づいてなされたもの
で、その目的とするところは電波の到来方向を操
作者の目測によらず計算によつて求めることによ
り、測定時間を短縮し得るとともに測定確度を向
上し得る方位測定装置を提供しようとするもので
ある。
This invention was made based on the above circumstances, and its purpose is to shorten measurement time and improve measurement accuracy by determining the direction of arrival of radio waves by calculation rather than by visual estimation by the operator. The aim is to provide a direction measuring device that can
この発明は表示器上に表示された方位波形デー
タの電波到来方向に隣接する両傾斜部にそれぞれ
沿う直線およびこれら直線の交点に位置したカー
ソル線を発生し、前記両直線を方位波形データに
一致した状態でカーソル線の位置を読取ることに
より自動的に電波の到来方向を求めるものであ
る。
This invention generates straight lines that respectively follow both slopes adjacent to the radio wave arrival direction of the azimuth waveform data displayed on the display and a cursor line located at the intersection of these straight lines, and aligns the two straight lines with the azimuth waveform data. By reading the position of the cursor line in this state, the direction of arrival of the radio waves is automatically determined.
以下、この発明の一実施例について図面を参照
して説明する。
An embodiment of the present invention will be described below with reference to the drawings.
第２図において、従来と同様に、ゴニオメータ
により受信された電波から方位角対レベルの信号
を取り出す。この方位角対レベルの信号を量子化
して得た量子化方位波形データ２１は表示画面の
位置座標（方位角対レベル：通常ゴニオメーター
出力には和ビームと差ビームがあり、和ビームで
はビーム指向方向でレベルがピークとなり、差ビ
ームではビーム指向方向で第１図に示すようにヌ
ルとなる）に対応して表示メモリ２２に記憶され
る。この記憶された方位波形データは順次読出さ
れ、所望の倍率に拡大されて表示器２３に表示さ
れる。この表示器２３には第３図に示す如く方位
波形データ２１が表示される。尚、説明の便宜上
方位波形データ２１を直線として示す。 In FIG. 2, as in the prior art, an azimuth versus level signal is extracted from radio waves received by a goniometer. The quantized azimuth waveform data 21 obtained by quantizing this azimuth versus level signal is the position coordinate of the display screen (azimuth versus level: Normally, the goniometer output has a sum beam and a difference beam, and the sum beam has a beam direction. The level is stored in the display memory 22 in correspondence to the direction in which the level peaks in the beam direction, and in the case of a difference beam, the level becomes null in the beam direction direction as shown in FIG. This stored azimuth waveform data is sequentially read out, enlarged to a desired magnification, and displayed on the display 23. The display 23 displays azimuth waveform data 21 as shown in FIG. Note that for convenience of explanation, the azimuth waveform data 21 is shown as a straight line.
一方、２４はカーソル発生回路である。このカ
ーソル発生回路２４は表示器２３の画面上に第３
図に示す如く直線l1，l2およびこの直線l1，l2の交
点に位置し方位角方向に直交するカーソル線Ｃを
発生するものである。前記直線l1，l2は方位波形
データ２１の電波到来方向（最低レベル）に隣接
する両傾斜部に沿うものである。この直線l1，l2
の傾斜角θ1，θ2は到来電波の周波数情報に対応し
てほぼ一義的に定まることが明らかとされてい
る。すなわち、枠形空中線２組を直交配置して回
転させる方式の一般的なゴニオメーターを考える
と、枠形空中線の縦方向の長さをｌ、横方向の長
さをＳ、電界強度をＥ、枠形成面と空中線への電
波到来方向とのなす角θとすれば、電波到来方向
に対する受信レベルVθは、
Vθ＝２√２ lE sin｛（πS cosθ）／λ｝ ……(1)
と表される。(1)式において、πS／λは受信周波
数ｆに比例する。 On the other hand, 24 is a cursor generation circuit. This cursor generation circuit 24 displays a third cursor on the screen of the display 23.
As shown in the figure, straight lines l 1 and l 2 and a cursor line C located at the intersection of these lines l 1 and l 2 and perpendicular to the azimuth direction are generated. The straight lines l 1 and l 2 are along both slopes adjacent to the radio wave arrival direction (lowest level) of the azimuth waveform data 21. This straight line l 1 , l 2
It is clear that the inclination angles θ 1 and θ 2 are almost uniquely determined in accordance with the frequency information of the arriving radio waves. In other words, considering a general goniometer in which two pairs of frame-shaped antennas are arranged orthogonally and rotated, the length of the frame-shaped antenna in the vertical direction is l, the length in the horizontal direction is S, and the electric field strength is E. If the angle between the frame forming surface and the direction of arrival of radio waves to the antenna is θ, then the reception level Vθ with respect to the direction of arrival of radio waves is expressed as Vθ=2√2 lE sin {(πS cosθ)/λ} ...(1) be done. In equation (1), πS/λ is proportional to the reception frequency f.
したがつて、上記方式のゴニオメーターの出力
指向特性は、一般に次式のように表される。 Therefore, the output directivity characteristic of the goniometer of the above type is generally expressed as the following equation.
Ｖ＝Ａ｜sin（ｆ×Ｂ）｜ ……(2)
Ｖは受信レベル、Ａは定数、ｆは受信周波数、Ｂ
は方位角の関数（cosθ）である。(2)式において、
測定する方位近傍では、θ90゜ゆえＢ０とな
る。 V = A | sin (f x B) | ...(2) V is the reception level, A is a constant, f is the reception frequency, B
is a function of azimuth (cosθ). In equation (2),
Near the direction of measurement, θ90° is therefore B0.
このため、｜ｆ×Ｂ｜≪１となるので、測定す
る方位近傍では、(2)式の受信レベルＶはＡ・（ｆ
×Ｂ）にほぼ等しくなる。よつて、レベル対方位
角信号は傾きが周波数に比例する直線に近似する
ことができる。このように、電波到来方位の近傍
を直線表示させると、その傾きは周波数によつて
一義的に近似することができる。 Therefore, |f×B|≪1, so near the direction of measurement, the reception level V in equation (2) is A・(f
xB). Thus, the level versus azimuth signal can be approximated by a straight line whose slope is proportional to frequency. In this way, when the vicinity of the radio wave arrival direction is displayed as a straight line, the slope can be uniquely approximated by the frequency.
したがつて、傾斜角演算器２５では図示せぬ受
信機より到来電波の周波数情報２６が供給される
と、これに対応した傾斜角情報が例えばROM
（リード・オンリ・メモリ）より読出され、前記
カーソル発生器２４に供給されるようになされて
いる。しかして、このカーソル発生器２４により
発生された直線l1，l2をカーソル発生器２４に設
けられた操作子によつて、表示された方位波形デ
ータ２１に第３図に示す如く合わせると、カーソ
ル線Ｃの画面上の位置がカーソル位置読取器２７
によつて読み取られる。このカーソル線Ｃの位置
は例えば表示器２３の画面左端の方位角が既知で
あれば拡大表示されていても即く方位角情報に変
換可能である。即ち、例えばカーソル線の位置に
よりアドレス指定されたROMに、このアドレス
に対応して方位角文字データを記憶しておき、こ
の方位角文字データをカーソル線の位置に応じて
読出せばよい。このようにして求められた到来電
波の方位角文字データは前記表示器２３に供給さ
れ、例えば画面の隅部に文字として表示される。 Therefore, when the inclination angle calculator 25 receives frequency information 26 of an incoming radio wave from a receiver (not shown), the inclination angle information corresponding to this is stored in the ROM, for example.
(read-only memory) and is supplied to the cursor generator 24. Then, when the straight lines l 1 and l 2 generated by the cursor generator 24 are matched with the displayed azimuth waveform data 21 as shown in FIG. 3 using the operator provided on the cursor generator 24, The position of cursor line C on the screen is determined by the cursor position reader 27.
read by. If the azimuth angle of the left end of the screen of the display 23 is known, the position of the cursor line C can be immediately converted into azimuth information even if the display is enlarged. That is, for example, azimuth character data may be stored in a ROM designated by the position of the cursor line in correspondence with this address, and this azimuth character data may be read out in accordance with the position of the cursor line. The azimuth character data of the incoming radio wave thus determined is supplied to the display 23 and displayed as characters, for example, in the corner of the screen.
上記構成によれば、量子化されて表示器２３に
表示された方位波形データの最低レベルに隣接す
る両傾斜部と一致する２本の直線を表示するとと
もに、これら直線の交点の位置にカーソル線を表
示し、前記両直線を方位波形データに合わせた状
態でカーソル線を読取ることにより自動的に電波
の到来方向を求めている。したがつて、従来のよ
うに操作者が目測により到来方向を測定する場合
に比べて、測定の確度を向上することができる。 According to the above configuration, two straight lines that coincide with both slopes adjacent to the lowest level of the azimuth waveform data quantized and displayed on the display 23 are displayed, and a cursor line is placed at the intersection of these straight lines. is displayed, and the direction of arrival of the radio wave is automatically determined by reading the cursor line with both of the straight lines aligned with the azimuth waveform data. Therefore, the accuracy of measurement can be improved compared to the conventional case in which the direction of arrival is visually measured by an operator.
また、表示器上に発生された２本の直線を方位
波形データに合わせるだけで即く、到来方向が求
められるため、測定時間を短縮することが可能で
ある。 Furthermore, since the direction of arrival can be immediately determined by simply matching two straight lines generated on the display to the azimuth waveform data, it is possible to shorten the measurement time.
尚、上記実施例では電波の到来方向が最低レベ
ルとなるように方位波形データを表示したが、こ
れに限らず電波到来方向が最高レベルとなるよう
に方位波形データを表示した場合においても同様
に実施することが可能である。 In the above embodiment, the azimuth waveform data is displayed so that the direction of arrival of the radio wave is at the lowest level, but this is not limited to this, and the same applies even when the azimuth waveform data is displayed so that the direction of arrival of the radio wave is at the highest level. It is possible to implement it.
その他、この発明の要旨を変えない範囲におい
て、種々変形実施可能なことは勿論である。 It goes without saying that various other modifications can be made without departing from the gist of the invention.
以上、詳述したようにこの発明によれば、電波
到来方向を操作者の目測によらず、計算によつて
求めることにより、測定時間を短縮し得るととも
に測定確度を向上し得る方位測定装置を提供でき
る。
As described in detail above, according to the present invention, there is provided an azimuth measuring device that can shorten measurement time and improve measurement accuracy by determining the direction of arrival of radio waves through calculation rather than visual measurement by the operator. Can be provided.
第１図は従来の方位測定方法を説明するために
示す図、第２図はこの発明に係わる方位測定装置
の一実施例を示す構成図、第３図は第２図の動作
を説明するために示す図である。
２１……方位波形データ、２３……表示メモ
リ、２３……表示器、２４……カーソル発生器、
２５……傾斜角演算器、２６……周波数情報、２
７……カーソル位置読取器、l1，l2……直線、Ｃ
……カーソル線。
FIG. 1 is a diagram for explaining a conventional direction measuring method, FIG. 2 is a configuration diagram showing an embodiment of a direction measuring device according to the present invention, and FIG. 3 is a diagram for explaining the operation of FIG. 2. FIG. 21...Azimuth waveform data, 23...Display memory, 23...Display device, 24...Cursor generator,
25... Tilt angle calculator, 26... Frequency information, 2
7... Cursor position reader, l 1 , l 2 ... Straight line, C
...Cursor line.
Claims (1)
角対レベルの信号を取り出すと共にその周波数情
報を出力する手段と、 この手段で取り出された方位角対レベル信号を
量子化して方位波形データとして出力する回路
と、 この方位波形データを記憶するメモリと、 このメモリより読出された方位波形データを表
示する表示器と、 前記周波数情報から前記方位波形データの到来
電波方向に隣接する両傾斜部に沿つた各直線の傾
斜角を導出する回路と、 前記表示器にカーソル線及び前記傾斜角を有す
る直線を発生する回路と、 前記表示器に表示される各直線を表示データの
前記傾斜部に合致させる手段と、 この手段で合致された各直線の交点に前記カー
ソル線を合致させる手段と、 この手段で合致されたカーソル線の位置を読取
り電波到来方向を求める回路とを具備したことを
特徴とする方位測定装置。[Claims] 1. Means for extracting an azimuth versus level signal from radio waves received by a goniometer and outputting its frequency information; and quantizing the azimuth versus level signal extracted by this means to generate azimuth waveform data. a circuit for outputting the azimuth waveform data, a memory for storing the azimuth waveform data, a display for displaying the azimuth waveform data read from the memory, and a double inclined portion adjacent to the direction of the arrival radio wave of the azimuth waveform data from the frequency information. a circuit that derives the slope angle of each straight line along the slope; a circuit that generates a cursor line and a straight line having the slope angle on the display; and a circuit that generates a cursor line on the display and a straight line having the slope, The present invention is characterized by comprising means for matching, means for matching the cursor line with the intersection of each line matched by this means, and a circuit for reading the position of the cursor line matched by this means to determine the direction of arrival of radio waves. Direction measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6356282A JPS58180965A (en) | 1982-04-16 | 1982-04-16 | Bearing measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6356282A JPS58180965A (en) | 1982-04-16 | 1982-04-16 | Bearing measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58180965A JPS58180965A (en) | 1983-10-22 |
| JPH0421827B2 true JPH0421827B2 (en) | 1992-04-14 |
Family
ID=13232785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6356282A Granted JPS58180965A (en) | 1982-04-16 | 1982-04-16 | Bearing measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58180965A (en) |
-
1982
- 1982-04-16 JP JP6356282A patent/JPS58180965A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58180965A (en) | 1983-10-22 |
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