JPH05215831A - Azimuth measuring device - Google Patents
Azimuth measuring deviceInfo
- Publication number
- JPH05215831A JPH05215831A JP4623292A JP4623292A JPH05215831A JP H05215831 A JPH05215831 A JP H05215831A JP 4623292 A JP4623292 A JP 4623292A JP 4623292 A JP4623292 A JP 4623292A JP H05215831 A JPH05215831 A JP H05215831A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- pulse width
- time difference
- azimuth
- arrival
- 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.)
- Granted
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、レーダ波等のパルス
変調された高周波信号の到来方位を高精度に測定する方
位測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an azimuth measuring device for highly accurately measuring the arrival azimuth of a pulse-modulated high frequency signal such as a radar wave.
【０００２】[0002]
【従来の技術】図３(a) は従来の方位測定装置のブロッ
ク構成を示す図であり、図において、１ａ，１ｂはアン
テナ、２ａ，２ｂは検波器、８ａ，８ｂは立上り検出
器、９はクロック発生器、１０はカウンタである。2. Description of the Related Art FIG. 3 (a) is a block diagram of a conventional azimuth measuring apparatus. In the figure, 1a and 1b are antennas, 2a and 2b are detectors, 8a and 8b are rising detectors, and 9a. Is a clock generator, and 10 is a counter.
【０００３】次に動作について図３(b) の動作波形図を
用いて説明する。アンテナ１ａ，１ｂで受信した、パル
ス変調された高周波信号には、アンテナ間距離ｄと入射
角度θで表わされる時間差ＴNext, the operation will be described with reference to the operation waveform diagram of FIG. The pulse-modulated high-frequency signals received by the antennas 1a and 1b have a time difference T represented by an inter-antenna distance d and an incident angle θ.
【０００４】Ｔ＝ (ｄ／ｃ)sinθ （ｃ＝光速）T = (d / c) sin θ (c = speed of light)
【０００５】が生ずる。このアンテナ受信信号を検波器
２ａ，２ｂで検波すると、図３(b) に示す２ａ出力，２
ｂ出力が得られ、これを立上り検出器８ａ，８ｂでクロ
ック９に同期して立上り検出する。立上り検出器８ａ，
８ｂの各々の出力に生ずる時間差をカウンタ１０で計数
すると、アンテナ間の到来時間差Ｔが測定できたことに
なり、この結果を上式にあてはめることで到来方位を決
定できる。Occurs. When this antenna reception signal is detected by the detectors 2a and 2b, the outputs 2a and 2a shown in FIG.
The output b is obtained, and the rising detectors 8a and 8b detect the rising in synchronization with the clock 9. Rise detector 8a,
If the counter 10 counts the time difference generated in each output of 8b, it means that the arrival time difference T between the antennas can be measured, and the arrival direction can be determined by applying this result to the above formula.
【０００６】[0006]
【発明が解決しようとする課題】従来の方位測定装置は
以上のように構成されているので、クロックの１周期が
時間差測定の最小単位となるため、測定精度を向上する
にはクロック周期を非常に短くしなければならないこと
となった。また、立上り検出器８ａ，８ｂ同士の遅延時
間差が直接誤差として影響するなどの問題点があった。Since the conventional azimuth measuring device is constructed as described above, one cycle of the clock is the minimum unit of the time difference measurement, and therefore the clock cycle is extremely important to improve the measurement accuracy. It has to be shortened to. Further, there is a problem that the delay time difference between the rising detectors 8a and 8b directly affects as an error.
【０００７】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、クロック周期以下の分解能で
時間差を測定できるとともに、立上り検出器を用いずに
時間差を測定して方位を測定できる方位測定装置を得る
ことを目的とする。The present invention has been made in order to solve the above problems, and it is possible to measure a time difference with a resolution of a clock period or less and to measure a direction by measuring the time difference without using a rise detector. The purpose is to obtain a possible bearing measuring device.
【０００８】[0008]
【課題を解決するための手段】この発明に係る方位測定
装置は、高周波信号を異なる位置で受信する複数のアン
テナ手段を設け、これらのアンテナで受信した信号を検
波する複数の検波手段を設け、これらの検波手段より得
られたビデオ信号同士を差動増幅する差動増幅手段を設
け、この差動増幅手段の出力をＡ／Ｄ変換する手段を設
け、上記Ａ／Ｄ変換手段の出力のパルス幅を演算する手
段を設け、上記演算したパルス幅から前記アンテナ手段
間の到来時間差を計算し、到来方位を求める方位検出手
段を設けものである。An azimuth measuring apparatus according to the present invention is provided with a plurality of antenna means for receiving high frequency signals at different positions, and a plurality of detecting means for detecting signals received by these antennas. A differential amplifying means for differentially amplifying the video signals obtained by these detecting means is provided, a means for A / D converting the output of the differential amplifying means is provided, and a pulse of the output of the A / D converting means is provided. A means for calculating the width is provided, and an azimuth detecting means for calculating an arrival time difference between the antenna means by calculating the arrival time difference from the calculated pulse width is provided.
【０００９】また、この発明に係る方位測定装置は、高
周波信号を異なる位置で受信する複数のアンテナ手段を
設け、これらのアンテナで受信した信号を検波する複数
の検波手段を設け、これらの検波手段より得られたビデ
オ信号同士を差動増幅する差動増幅手段を設け、上記検
波手段より得られたビデオ信号のそれぞれのパルス幅を
検出する手段を設け、上記差動増幅手段の出力をＡ／Ｄ
変換する手段を設け、上記Ａ／Ｄ変換手段の出力のパル
ス幅を演算する，あるいは上記パルス幅検出手段の出力
の立ち上がりの時間差からパルス幅を演算する手段を設
け、上記演算したパルス幅から前記アンテナ手段間の到
来時間差を計算し、到来方位を求める方位検出手段を設
けたものである。Further, the azimuth measuring apparatus according to the present invention is provided with a plurality of antenna means for receiving high frequency signals at different positions, and a plurality of detecting means for detecting the signals received by these antennas. Differential amplification means for differentially amplifying the video signals obtained by the above is provided, means for detecting the pulse width of each of the video signals obtained by the detection means is provided, and the output of the differential amplification means is A / D
A means for converting is provided to calculate the pulse width of the output of the A / D converting means, or a means for calculating the pulse width from the time difference between the rising edges of the outputs of the pulse width detecting means is provided, and the pulse width is calculated from the calculated pulse width. An azimuth detecting means for calculating the arrival time difference between the antenna means and finding the arrival azimuth is provided.
【００１０】[0010]
【作用】この発明においては、差動増幅手段は、アンテ
ナで受信した信号同士が到来時間は異なるが、振幅は同
じであることを利用し、差動増幅により時間差に対応し
たパルスを発生させるとともに、このパルス幅を測定す
るために一度Ａ／Ｄ変換した上でそのパルス幅を測定す
ることにより、時間内挿が可能となり、高精度な時間差
測定が可能となる。In the present invention, the differential amplifying means uses the fact that the signals received by the antennas have different arrival times but the same amplitude, and the differential amplifying means generates a pulse corresponding to the time difference. By once A / D converting to measure the pulse width and then measuring the pulse width, time interpolation becomes possible and highly accurate time difference measurement becomes possible.
【００１１】また、この発明においては、検波手段の出
力同士を差動増幅手段で差動増幅して到来時間差に対応
したパルスを発生するとともに、このパルスをＡ／Ｄ変
換手段で振幅をサンプルするか、あるいは上記検波手段
の出力のパルス幅を検出する手段のパルスの立ち上がり
の時間差から時間差を演算する構成としたので、到来パ
ルスに依存することなく、より高精度な時間差測定が可
能となる。Further, according to the present invention, the outputs of the detecting means are differentially amplified by the differential amplifying means to generate a pulse corresponding to the arrival time difference, and the amplitude of this pulse is sampled by the A / D converting means. Alternatively, since the time difference is calculated from the time difference between the rising edges of the pulses of the means for detecting the pulse width of the output of the detecting means, more accurate time difference measurement can be performed without depending on the incoming pulse.
【００１２】[0012]
【実施例】以下、この発明の実施例を図について説明す
る。図１(a) は本発明の一実施例による方位測定装置の
ブロック構成を示す図であり、図において、１ａ，１ｂ
は受信用のアンテナ、２ａ，２ｂは検波器、３は差動増
幅器、４はＡ／Ｄ変換器、５はパルス幅演算器である。
図１(b) は上記検波器２ａ，２ｂ，差動増幅器３の出力
を示す波形図である。また図４(a),(b) は上記パルス幅
演算器５の動作を説明するための波形図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a diagram showing a block configuration of an azimuth measuring apparatus according to an embodiment of the present invention.
Is a receiving antenna, 2a and 2b are detectors, 3 is a differential amplifier, 4 is an A / D converter, and 5 is a pulse width calculator.
FIG. 1 (b) is a waveform diagram showing the outputs of the detectors 2a and 2b and the differential amplifier 3. 4A and 4B are waveform charts for explaining the operation of the pulse width calculator 5.
【００１３】次に動作を図１(b) の波形図を用いて説明
する。アンテナ１ａ，１ｂで受信した信号は、検波器２
ａ，２ｂで検波されビデオ信号となる。このビデオ信号
を差動増幅器３で差動増幅すると、差動増幅器３の出力
として到来時間差と同じ幅のパルスが出力される。この
パルスをＡ／Ｄ変換器４でＡ／Ｄ変換し、パルス幅演算
器５で時間内挿を行いながらパルス幅を測定することで
到来時間差を測定できる。即ち図４(a),(b) に示すよう
に、パルス幅演算器５でＡ／Ｄ変換器４出力をもとにパ
ルス幅を演算するには、まず図４(a) のようにＡ／Ｄ変
換器４出力に対しＡ／Ｄサンプルポイント毎に時間内挿
し、該内挿値を用いて図４(b) に示すようにパルス幅を
演算するようにすればよい。Next, the operation will be described with reference to the waveform chart of FIG. The signals received by the antennas 1a and 1b are detected by the detector 2
The video signal is detected by a and 2b. When this video signal is differentially amplified by the differential amplifier 3, a pulse having the same width as the arrival time difference is output as the output of the differential amplifier 3. The arrival time difference can be measured by A / D converting this pulse by the A / D converter 4 and measuring the pulse width while performing the time interpolation by the pulse width calculator 5. That is, as shown in FIGS. 4 (a) and 4 (b), in order to calculate the pulse width by the pulse width calculator 5 based on the output of the A / D converter 4, first, as shown in FIG. The output of the / D converter 4 may be time-interpolated for each A / D sample point, and the interpolated value may be used to calculate the pulse width as shown in FIG. 4 (b).
【００１４】このように本実施例では、差動増幅手段
は、アンテナで受信した信号同士は到来時間は異なる
が、振幅は同じであることを利用し、差動増幅により時
間差に対応したパルスを発生させるとともに、このパル
ス幅を測定するために一度Ａ／Ｄ変換した上でそのパル
ス幅を測定することにより、時間内挿が可能となり、よ
り高精度な時間差測定が可能となる。As described above, in the present embodiment, the differential amplifying means utilizes the fact that the signals received by the antennas have different arrival times but have the same amplitude, so that a pulse corresponding to the time difference is generated by the differential amplification. When the pulse width is generated, A / D conversion is performed once to measure the pulse width, and then the pulse width is measured, whereby time interpolation can be performed, and more accurate time difference measurement can be performed.
【００１５】なお、上記実施例では到来時間差が到来パ
ルス幅より短い場合（図１(b) 参照）を例にとって説明
したが、図２(a) に示す、本発明の第２の実施例のよう
に、パルス幅検出器６ａ，６ｂで到来パルス幅を測定
し、到来時間差が到来パルス幅より短い場合には上記と
同じ方法で到来時間差を測定し、到来時間差が到来パル
ス幅より長い場合にはパルス幅検出器６ａ，６ｂの出力
から立上りのトリガ（図２(b) 参照）を受け、両者の時
間差を時間差演算器７で測定することで到来パルス幅に
依存せず到来時間差を測定できる構成を得ることが可能
となる。この場合のパルス幅検出器６ａ，６ｂの動作と
しては、パルスの立ち上がり，立ち下がりを容易に検出
するために、図５(a) に示す入力波形の立ち上がり，立
ち下がりでロジックレベルのLow とHighを切り換え、図
５(b) に示す出力波形が得られる装置構成とすればよ
い。In the above embodiment, the case where the arrival time difference is shorter than the arrival pulse width (see FIG. 1B) has been described as an example. However, in the second embodiment of the present invention shown in FIG. 2A. As described above, the arrival pulse width is measured by the pulse width detectors 6a and 6b, the arrival time difference is measured by the same method as above when the arrival time difference is shorter than the arrival pulse width, and the arrival time difference is longer than the arrival pulse width. Receives a rising trigger (see Fig. 2 (b)) from the outputs of the pulse width detectors 6a and 6b, and measures the time difference between the two with the time difference calculator 7 to measure the arrival time difference without depending on the arrival pulse width. The configuration can be obtained. The operation of the pulse width detectors 6a and 6b in this case is to detect the rising and falling edges of the pulse easily, in order to easily detect the rising and falling edges of the pulse. And the device configuration is such that the output waveform shown in FIG. 5 (b) is obtained.
【００１６】このように第２の実施例では、検波器２
ａ，２ｂの出力同士を差動増幅器３で差動増幅して到来
時間差に対応したパルスを発生するとともに、このパル
スをＡ／Ｄ変換器４で振幅をサンプルするか、あるいは
上記両検波器２ａ，２ｂの出力のパルス幅をそれぞれ検
出するパルス幅検出器６ａ，６ｂの２つのパルスの立ち
上がりの時間差から到来時間差を演算する構成としたの
で、到来パルスに依存することなく、より高精度な時間
差測定が可能となる。As described above, in the second embodiment, the detector 2
The outputs of a and 2b are differentially amplified by the differential amplifier 3 to generate a pulse corresponding to the arrival time difference, and the amplitude of this pulse is sampled by the A / D converter 4, or both the detectors 2a , 2b, the pulse width detectors 6a and 6b for detecting the pulse widths of the outputs respectively, calculate the arrival time difference from the time difference between the rising edges of the two pulses, so that a more accurate time difference can be obtained without depending on the arrival pulse. It becomes possible to measure.
【００１７】[0017]
【発明の効果】以上のように、この発明に係る方位測定
装置によれば、差動増幅手段で到来時間差と同じ幅のパ
ルスを発生し、Ａ／Ｄ変換手段を用い、時間内挿しなが
らそのパルス幅を演算することで、パルス幅測定精度を
向上するように構成したので、精度の高い方位測定が行
える効果がある。As described above, according to the azimuth measuring apparatus of the present invention, the differential amplifying means generates the pulse having the same width as the arrival time difference, and the A / D converting means is used to perform the time interpolation. Since the pulse width measurement accuracy is improved by calculating the pulse width, the azimuth measurement with high accuracy can be performed.
【００１８】また、この発明に係る方位測定装置によれ
ば、検波手段の出力同士を差動増幅手段で差動増幅して
到来時間差に対応したパルスを発生するとともに、この
パルスをＡ／Ｄ変換手段で振幅をサンプルするか、ある
いは上記検波手段の出力のパルス幅を検出する手段のパ
ルスの立ち上がりの時間差から到来時間差を演算する構
成としたので、到来パルスに依存することなく、より高
精度な時間差測定が行える効果がある。According to the azimuth measuring device of the present invention, the outputs of the detecting means are differentially amplified by the differential amplifying means to generate a pulse corresponding to the arrival time difference, and the pulse is A / D converted. Since the arrival time difference is calculated from the time difference between the rising edges of the pulses of the means for detecting the pulse width of the output of the detection means or the amplitude is sampled by the means, it is possible to achieve higher accuracy without depending on the arrival pulse. There is an effect that time difference measurement can be performed.
【図１】この発明の一実施例による方位測定装置のブロ
ック構成及びその動作波形図である。FIG. 1 is a block configuration of an azimuth measuring device according to an embodiment of the present invention and an operation waveform diagram thereof.
【図２】この発明の他の実施例による方位測定装置のブ
ロック構成及びその動作波形図である。FIG. 2 is a block diagram of an azimuth measuring apparatus according to another embodiment of the present invention and an operation waveform diagram thereof.
【図３】従来の方位測定装置のブロック構成を示すブロ
ック構成図である。FIG. 3 is a block configuration diagram showing a block configuration of a conventional azimuth measuring device.
【図４】図１のパルス幅演算器の動作を説明する説明図
である。FIG. 4 is an explanatory diagram illustrating an operation of the pulse width calculator of FIG. 1.
【図５】図２のパルス幅検出器の動作を説明する説明図
である。5 is an explanatory diagram illustrating an operation of the pulse width detector of FIG. 2. FIG.
１ａ，１ｂ アンテナ ２ａ，２ｂ 検波器 ３ 差動増幅器 ４ Ａ／Ｄ変換器 ５ パルス幅演算器 ６ａ，６ｂ パルス幅検出器 ７ 時間差演算器 ８ａ，８ｂ 立上り検出器 ９ クロック １０ カウンタ 1a, 1b Antenna 2a, 2b Detector 3 Differential amplifier 4 A / D converter 5 Pulse width calculator 6a, 6b Pulse width detector 7 Time difference calculator 8a, 8b Rise detector 9 Clock 10 Counter
Claims (2)
を測定する方位測定装置において、 高周波信号を異なる位置で受信する複数のアンテナ手段
と、 これらのアンテナで受信した信号を検波する複数の検波
手段と、 これらの検波手段より得られたビデオ信号同士を差動増
幅する差動増幅手段と、 この差動増幅手段の出力をＡ／Ｄ変換する手段と、 上記Ａ／Ｄ変換手段の出力のパルス幅を演算する手段
と、 上記演算したパルス幅から前記アンテナ手段間の到来時
間差を計算し、到来方位を求める方位検出手段とを備え
たことを特徴とする方位測定装置。1. An azimuth measuring device for measuring the arrival azimuth of a pulse-modulated high-frequency signal, comprising: a plurality of antenna means for receiving the high-frequency signal at different positions; and a plurality of detection means for detecting the signals received by these antennas. A differential amplification means for differentially amplifying the video signals obtained by these detection means, a means for A / D converting the output of the differential amplification means, and a pulse for the output of the A / D conversion means. An azimuth measuring apparatus comprising: a means for calculating a width; and an azimuth detecting means for calculating an arrival time difference between the antenna means based on the calculated pulse width to obtain an arrival azimuth.
を測定する方位測定装置において、 高周波信号を異なる位置で受信する複数のアンテナ手段
と、 これらのアンテナで受信した信号を検波する複数の検波
手段と、 これらの検波手段より得られたビデオ信号同士を差動増
幅する差動増幅手段と、 上記検波手段より得られたビデオ信号のそれぞれのパル
ス幅を検出する手段と、 上記差動増幅手段の出力をＡ／Ｄ変換する手段と、 上記Ａ／Ｄ変換手段の出力のパルス幅を演算する，ある
いは上記パルス幅検出手段の出力の立ち上がりの時間差
からパルス幅を演算する手段と、 上記演算したパルス幅から前記アンテナ手段間の到来時
間差を計算し、到来方位を求める方位検出手段とを備え
たことを特徴とする方位測定装置。2. An azimuth measuring apparatus for measuring the arrival azimuth of a pulse-modulated high frequency signal, comprising: a plurality of antenna means for receiving the high frequency signal at different positions; and a plurality of detection means for detecting the signals received by these antennas. A differential amplification means for differentially amplifying the video signals obtained by these detection means, a means for detecting the pulse width of each of the video signals obtained by the detection means, and a differential amplification means for the differential amplification means. Means for A / D converting the output, means for calculating the pulse width of the output of the A / D converting means, or means for calculating the pulse width from the time difference between the rising edges of the outputs of the pulse width detecting means, and the calculated pulse An azimuth measuring device comprising: an azimuth detecting means for calculating an arrival time difference between the antenna means from the width and obtaining an arrival azimuth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4623292A JP2839406B2 (en) | 1992-01-31 | 1992-01-31 | Direction measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4623292A JP2839406B2 (en) | 1992-01-31 | 1992-01-31 | Direction measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05215831A true JPH05215831A (en) | 1993-08-27 |
| JP2839406B2 JP2839406B2 (en) | 1998-12-16 |
Family
ID=12741375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4623292A Expired - Fee Related JP2839406B2 (en) | 1992-01-31 | 1992-01-31 | Direction measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2839406B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990054189A (en) * | 1997-12-26 | 1999-07-15 | 전주범 | Azimuth detector |
| JP2007127503A (en) * | 2005-11-02 | 2007-05-24 | Nippon Soken Inc | Object location detection apparatus |
-
1992
- 1992-01-31 JP JP4623292A patent/JP2839406B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990054189A (en) * | 1997-12-26 | 1999-07-15 | 전주범 | Azimuth detector |
| JP2007127503A (en) * | 2005-11-02 | 2007-05-24 | Nippon Soken Inc | Object location detection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2839406B2 (en) | 1998-12-16 |
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