JP2969875B2 - Direction measurement device - Google Patents
Direction measurement deviceInfo
- Publication number
- JP2969875B2 JP2969875B2 JP24658690A JP24658690A JP2969875B2 JP 2969875 B2 JP2969875 B2 JP 2969875B2 JP 24658690 A JP24658690 A JP 24658690A JP 24658690 A JP24658690 A JP 24658690A JP 2969875 B2 JP2969875 B2 JP 2969875B2
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- amplitude
- circuit
- repetition interval
- azimuth
- 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 - Lifetime
Links
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- Radar Systems Or Details Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、外来のパルス状の電波を受信し、受信して
いる電波の到来方向を測定する方位測定装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an azimuth measuring device that receives an external pulsed radio wave and measures the arrival direction of the received radio wave.
従来、この種の方位測定装置は、第２図に示すよう
に、回転空中線１で受信した受信信号のレベルを振幅比
較回路２においてあらかじめ定めたレベルと比較し、あ
らかじめ定めたレベル以上の振幅をもつパルス信号のみ
が検出され、方位算出回路３において回転空中線１から
の回転角度信号を基に検出されたパルス列ごとに到来方
位が算出される方式となっていた。2. Description of the Related Art Conventionally, as shown in FIG. 2, this type of azimuth measuring apparatus compares the level of a received signal received by a rotating antenna 1 with a predetermined level in an amplitude comparison circuit 2 and determines an amplitude equal to or higher than a predetermined level. Only the pulse signal having the rotation angle is detected, and the direction calculation circuit 3 calculates the arrival direction for each pulse train detected based on the rotation angle signal from the rotating antenna 1.
上述した従来の方位測定装置は、目標とする電波発射
源からの直接波のほかに自己の周辺に存在する建造物，
山などによる反射波が存在する場合、これら反射波の到
来方位も直接波と同様に計測してしまい、目標とする電
波発射源の方位の区別がつかないという欠点がある。The conventional azimuth measuring device described above includes a direct wave from a target radio wave emitting source, a building existing around itself,
When there are reflected waves due to mountains or the like, the arrival directions of these reflected waves are measured in the same manner as the direct waves, and there is a disadvantage that the direction of the target radio wave emission source cannot be distinguished.
本発明の方位測定装置は、指向方向を回転させながら
外来電波を受信し受信信号及び回転角信号を出力する回
転空中線と、前記受信信号のうちあらかじめ定めたレベ
ル以上の振幅をもつ受信パルスを検出してパルス列を出
力する振幅比較回路と、前記パルス列のパルス繰り返し
間隔を測定するパルス繰返し間隔測定回路と、前記受信
パルスの振幅を計測する振幅計測回路と、前記パルス列
及び対応する前記回転角信号の値から電波到来方位を求
め前記回転空中線の１回転の間に複数の前記パルス列が
存在する場合には前記パルス繰り返し間隔測定回路が計
測したパルス繰り返し間隔と前記振幅計測回路が出力し
た振幅に基づき前記パルス列のそれぞれの間のパルス繰
り返し間隔が等しいときに振幅の最も大きい前記パルス
列の到来方位のみを出力する方位算出回路とを有してい
る。The azimuth measuring device of the present invention detects a rotating antenna that receives an external radio wave while rotating a directional direction and outputs a reception signal and a rotation angle signal, and a reception pulse having an amplitude equal to or greater than a predetermined level among the reception signals. An amplitude comparison circuit that outputs a pulse train, a pulse repetition interval measurement circuit that measures the pulse repetition interval of the pulse train, an amplitude measurement circuit that measures the amplitude of the received pulse, and the pulse train and the corresponding rotation angle signal. When a plurality of the pulse trains are found during one rotation of the rotating antenna, the direction of arrival of the radio wave is determined from the value, and based on the pulse repetition interval measured by the pulse repetition interval measurement circuit and the amplitude output by the amplitude measurement circuit, When the pulse repetition intervals between each of the pulse trains are equal, only the arrival direction of the pulse train having the largest amplitude is determined. And a bearing calculation circuit for force.
前記振幅計測回路は前記受信信号を入力するA/D変換
回路であってもよい。The amplitude measurement circuit may be an A / D conversion circuit that inputs the reception signal.
次に本発明について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図、第２図
は第１図の実施例の動作のタイミングチャートである。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart of the operation of the embodiment of FIG.
本実施例は、受信信号ａ及び回転角信号ｂを出力する
空中線１と、受信信号ａを入力してパルス列ｃを出力す
る振幅比較回路２と、パルス列ｃを入力してデータｄを
出力するパルス繰返し間隔測定回路４と、受信信号ａを
入力するA/D変換回路５と、回転角信号b,パルス列c,デ
ータｄ及びA/D変換回路５からの信号を入力する方位算
出回路３とを備えて構成されている。In this embodiment, an antenna 1 that outputs a reception signal a and a rotation angle signal b, an amplitude comparison circuit 2 that inputs a reception signal a and outputs a pulse train c, and a pulse that inputs a pulse train c and outputs data d A repetition interval measurement circuit 4, an A / D conversion circuit 5 for inputting a received signal a, and a direction calculation circuit 3 for inputting a rotation angle signal b, a pulse train c, data d, and a signal from the A / D conversion circuit 5 It is provided with.
次に、本実施例の動作について説明する。 Next, the operation of the present embodiment will be described.
回転空中線１はその指向方向を回転させながら外来の
電波を受信し、受信信号ａと回転角信号ｂとを出力して
いる。振幅比較回路２は、あらかじめ定めたレベルと受
信信号ａのレベルとの比較を行い、あらかじめ定めたレ
ベル以上の振幅をもつ受信パルスを検出し、パルス列ｃ
として出力する。パルス繰返し間隔測定回路４は、パル
ス列ｃのパルス繰返し周波数を計測し、データｄとして
方位算出回路３に出力する。また、A/D変換回路５は、
受信信号ａ中の各受信パルス列毎（例えば、第３図のパ
ルス列ｃ中のパルス列c1,c2,c3毎）にパルス振幅を計測
し、計測結果を方位算出回路３に出力する。The rotating antenna 1 receives an external radio wave while rotating its directional direction, and outputs a reception signal a and a rotation angle signal b. The amplitude comparison circuit 2 compares a predetermined level with the level of the reception signal a, detects a reception pulse having an amplitude equal to or higher than the predetermined level, and generates a pulse train c.
Output as The pulse repetition interval measuring circuit 4 measures the pulse repetition frequency of the pulse train c and outputs it to the bearing calculation circuit 3 as data d. Also, the A / D conversion circuit 5
The pulse amplitude is measured for each of the received pulse trains in the received signal a (for example, for each of the pulse trains c1, c2, and c3 in the pulse train c in FIG. 3), and the measurement result is output to the azimuth calculation circuit 3.
方位算出回路３は演算素子及びレジスタから構成さ
れ、以下に説明する処理を行なう。The azimuth calculation circuit 3 includes an arithmetic element and a register, and performs processing described below.
振幅比較回路２からのパルス列ｃと回転空中線１から
の回転角信号ｂの値から各パルス列の中心の方位角を求
める。回転空中線１の１回転の間にパルス列が１つしか
ない場合には、上述したようにして求めた方位角を電波
の到来方向として出力する。The azimuth of the center of each pulse train is obtained from the pulse train c from the amplitude comparison circuit 2 and the value of the rotation angle signal b from the rotating antenna 1. When there is only one pulse train during one rotation of the rotating antenna 1, the azimuth angle obtained as described above is output as the direction of arrival of the radio wave.
また目標とする電波源からの直接波以外に自己の周辺
の建造物，山などからの反射波があり回転空中線１の１
回転の間に複数のパルス列が存在する場合には、データ
ｄを参照して各パルス列ごとのパルス繰返し間隔を比較
し、等しいパルス繰返し間隔のパルス列が存在する場
合、A/D変換回路５で測定したパルス振幅の一番大きな
パルス列以外のパルス列は除去し、残ったパルス列の方
位角を電波到来方位として出力する。In addition to the direct wave from the target radio wave source, there are reflected waves from buildings, mountains, etc. in the vicinity of the radio wave source.
When there are a plurality of pulse trains during the rotation, the pulse repetition interval of each pulse train is compared with reference to the data d, and if there is a pulse train with the same pulse repetition interval, measurement is performed by the A / D conversion circuit 5 Pulse trains other than the pulse train having the largest pulse amplitude are removed, and the azimuth of the remaining pulse train is output as the radio wave arrival direction.
反射波のパルス繰返し間隔は直接波のそれと等しく、
また、反射波のパルス振幅は直接波のそれと比較して小
さいという特徴があるため、上述した処理を行うことに
より、反射波の影響を除去することができる。The pulse repetition interval of the reflected wave is equal to that of the direct wave,
In addition, since the pulse amplitude of the reflected wave is smaller than that of the direct wave, the influence of the reflected wave can be removed by performing the above-described processing.
以上説明したように本発明、別方位と計測される信号
の中でパルス繰返し間隔が等しいものについては、パル
ス振幅の一番大きなもの以外の方位は除去することによ
り、周辺の建造物，山などからの反射波の影響を除去し
た正しい方位測定ができるという効果がある。As described above, according to the present invention, among signals measured in different directions, those having the same pulse repetition interval are removed by removing directions other than the one having the largest pulse amplitude, so that surrounding buildings, mountains, and the like are removed. There is an effect that correct azimuth measurement can be performed without the influence of the reflected wave from the camera.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図の実施例の動作のタイミングチャート、第３図は
従来の方位測定装置の一例のブロック図である。 １……回転空中線、２……振幅比較回路、３……方位算
出回路、４……パルス繰返し間隔測定回路。５……A/D
変換回路。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a timing chart of the operation of the embodiment of FIG. 1, and FIG. 3 is a block diagram of an example of a conventional direction measuring device. 1 ... rotating antenna, 2 ... amplitude comparison circuit, 3 ... azimuth calculation circuit, 4 ... pulse repetition interval measurement circuit. 5 ... A / D
Conversion circuit.
Claims (2)
し受信信号及び回転角信号を出力する回転空中線と、前
記受信信号のうちあらかじめ定めたレベル以上の振幅を
もつ受信パルスを検出してパルス列を出力する振幅比較
回路と、前記パルス列のパルス繰り返し間隔を測定する
パルス繰返し間隔測定回路と、前記受信パルスの振幅を
計測する振幅計測回路と、前記パルス列及び対応する前
記回転角信号の値から電波到来方位を求め前記回転空中
線の１回転の間に複数の前記パルス列が存在する場合に
は前記パルス繰り返し間隔測定回路が計測したパルス繰
り返し間隔と前記振幅計測回路が出力した振幅に基づき
前記パルス列のそれぞれの間のパルス繰り返し間隔が等
しいときに振幅の最も大きい前記パルス列の到来方位の
みを出力する方位算出回路とを有することを特徴とする
方位測定装置。1. A rotating antenna for receiving an external radio wave while rotating a directional direction and outputting a reception signal and a rotation angle signal, and a reception pulse having an amplitude of a predetermined level or more among the reception signals is detected. An amplitude comparison circuit, a pulse repetition interval measurement circuit for measuring the pulse repetition interval of the pulse train, an amplitude measurement circuit for measuring the amplitude of the received pulse, and a radio wave from the pulse train and the value of the corresponding rotation angle signal. When there are a plurality of the pulse trains during one rotation of the rotating antenna, the direction of arrival is determined, and each of the pulse trains is based on the pulse repetition interval measured by the pulse repetition interval measurement circuit and the amplitude output by the amplitude measurement circuit. Azimuth that outputs only the azimuth of arrival of the pulse train with the largest amplitude when the pulse repetition intervals between are equal Direction measuring apparatus characterized by having a circuit output.
るA/D変換回路であることを特徴とする請求項１記載の
方位測定装置。2. The azimuth measuring device according to claim 1, wherein said amplitude measuring circuit is an A / D conversion circuit for inputting said received signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24658690A JP2969875B2 (en) | 1990-09-17 | 1990-09-17 | Direction measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24658690A JP2969875B2 (en) | 1990-09-17 | 1990-09-17 | Direction measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04125481A JPH04125481A (en) | 1992-04-24 |
| JP2969875B2 true JP2969875B2 (en) | 1999-11-02 |
Family
ID=17150622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24658690A Expired - Lifetime JP2969875B2 (en) | 1990-09-17 | 1990-09-17 | Direction measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2969875B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5978623B2 (en) * | 2011-12-28 | 2016-08-24 | 三菱電機株式会社 | Direction measuring device |
-
1990
- 1990-09-17 JP JP24658690A patent/JP2969875B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04125481A (en) | 1992-04-24 |
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