JP2635679B2 - Weather radar system - Google Patents

Weather radar system

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JP2635679B2
JP2635679B2 JP63112269A JP11226988A JP2635679B2 JP 2635679 B2 JP2635679 B2 JP 2635679B2 JP 63112269 A JP63112269 A JP 63112269A JP 11226988 A JP11226988 A JP 11226988A JP 2635679 B2 JP2635679 B2 JP 2635679B2
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signal
polarization
trigger
circuit
horizontal
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JPH01282487A (en
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文彦 相川
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三菱電機株式会社
建設省土木研究所長
日本無線株式会社
株式会社東芝
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10Information and communication technologies [ICT] supporting adaptation to climate change.
    • Y02A90/12Specially adapted for meteorology, e.g. weather forecasting, climate modelling
    • Y02A90/17Weather surveillance systems using the reflection or reradiation of electromagnetic waves
    • Y02A90/18Radar-based

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) この発明は、気象観測に用いられる気象レーダ装置に関する。 DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (FIELD OF THE INVENTION) This invention relates to a weather radar system for use in weather observation.

(従来の技術) 従来の気象レーダ装置にあっては、水平偏波(H)の電波を送出してその反射波を受信し、その受信信号の受信電力から降雨量を算出している。 In the (prior art) conventional weather radar unit, receives the reflected waves by sending radio waves of the horizontal polarization (H), it calculates the rainfall from the received power of the received signal. ところが、最近ではより精度の良い降雨量の算出、及び降雪量の算出という点から、氷(雪)から雨になるブライトバンドの検出及び氷(雪)、雨の判別をも要求されるようになった。 However, more calculation of accurate rainfall recently, and from the viewpoint of calculation of snowfall, detection and ice (snow) Bright band of rain from the ice (snow), as is also required to determine the rain became. しかしながら、上記のような水平偏波による観測だけではブライトバンドを知ること及び雪、雨の判別を行なうことはできない。 However, only the observation by the horizontal polarized wave as described above can not be performed knowing the bright band and snow, the discrimination of rain.

すなわち、氷(雪)粒の落下時の形状はほぼ球状になっているが、雨粒になると空気抵抗によって水平方向に広がって楕円球状になる。 That is, ice (snow) at grain falling shapes has become almost spherical, an elliptical spherical shape spreads in the horizontal direction by the air resistance becomes a raindrop. このため、水平偏波の電波で垂直方向に走査すると、氷(雪)から雨になるにつれて電界強度が強くなっていく。 Therefore, when scanning in the vertical direction a radio wave of horizontally polarized wave, the electric field strength is getting stronger as will rain from the ice (snow). しかしながら、実際にはこの電界強度の変化には種々の要因が含まれており、氷(雪)か雨か特定することはできない。 However, this is the change in the electric field strength includes a variety of factors, ice can not be identified either (snow) or rain actually.

(発明が解決しようとする課題) 以上述べたように従来の気象レーダ装置にあっては、 As mentioned (invention will to challenge Solved) than in the conventional weather radar system,
水平偏波での観測によるため、ブライトバンドの検出や雪、雨の形状差の検出はできなかった。 For by the observation in the horizontal polarization, it could not detect the detection and snow, the shape difference between the rain of bright band.

この発明は上記事情を考慮してなされたもので、ブライトバンドや気象目標の形状差を容易にかつ効率よく検出することのできる気象レーダ装置を提供することを目的とする。 The present invention has been made in consideration of the above circumstances, and an object thereof is to provide a weather radar system that can be detected with ease and efficiently a shape difference of bright band and weather targets.

[発明の構成] (課題を解決するための手段) 上記目的を達成するためにこの発明に係る気象レーダ装置は、水平偏波、垂直偏波の各電波をレーダ繰返し周期で交互に送出する送信手段と、この送信手段で送出される水平偏波、垂直偏波の各電波の反射波を受信する受信手段と、この受信手段で得られる水平偏波受信信号及び垂直偏波受信信号からそれぞれ不要信号成分を除去した後、平均化して水平偏波面信号強度情報及び垂直偏波面信号強度情報を求める偏波面信号処理手段と、この偏波面信号手段で得られる水平、垂直偏波面信号強度情報から各偏波面の平均信号強度の差を求める偏波面信号強度差演算手段と、前記偏波面信号処理手段で得られる水平、垂直偏波面信号強度情報の少なくともいずれか一方の情報に基づいて気象目標 Weather radar apparatus according to the present invention Configuration of the Invention] To achieve the (solutions for the problem) above object, transmission for transmitting horizontal polarization, each wave of the vertically polarized waves alternately by the radar repetition period means and a horizontal polarization that is transmitted by the transmitting means, receiving means for receiving a reflected wave of the radio wave of vertically polarized wave, respectively unwanted horizontal polarization reception signal and the vertical polarization received signal obtained by the receiving means after removal of the signal component, and the polarization signal processing means for determining the horizontal polarization signal strength information and the vertical polarization signal intensity information by averaging the horizontal obtained by this polarization signal means, each of the vertical polarization signal strength information a polarization signal intensity difference calculation means for calculating a difference between the average signal strength of the plane of polarization, horizontal obtained by the polarization signal processing unit, meteorological target based on at least one of the information of the vertical polarization signal strength information する雨及び氷または雪の量及び地域を識別表示し、前記偏波面信号強度差演算手段の演算結果に基づいて氷または雪から雨になるブライトバンド及び氷または雪と雨とを識別表示する表示手段とを具備して構成される。 Rain and ice or snow amount and area displays identification, for identifying and displaying the bright band and ice or snow and rain will rain from the ice or snow on the basis of the calculation result of the polarization signal intensity difference calculation means display for configured and means.

(作用) 上記構成による気象レーダ装置では、水平偏波、垂直偏波の各電波をレーダ繰返し周期で交互に送出し、その各電波の反射波を受信して水平偏波受信信号及び垂直偏波受信信号を得る。 (Operation) In the weather radar apparatus according to the arrangement, horizontal polarization, each wave of the vertically polarized wave sent alternately by the radar repetition period, the horizontal polarization received signal and the vertical polarization and receiving reflected waves thereof each radio obtaining a received signal. そして、水平偏波受信信号及び垂直偏波受信信号から不要信号成分を除去した後、各信号強度の平均値を求める。 Then, after removing the unnecessary signal component from a horizontal polarization reception signal and the vertical polarization received signal, obtains the average value of the signal strength. ここで、水平偏波信号の信号強度は氷(雪)と雨とで異なるが、垂直偏波信号の信号強度は氷も雨と変りないので、両平均値の差を演算することによりブライトバンド対応部分及び気象目標の形状差で信号が得られる。 Since although the signal strength of the horizontal polarization signal varies between rain and ice (snow), the signal strength of the vertical polarization signal is ice not change as rain, bright band by calculating the difference between the average value signal is obtained in the form difference corresponding portion and the weather targets. この差信号を表示器に入力することによって気象目標の形状差についての情報を表示する。 To view information about the shape differences of weather target by inputting the difference signal to the display unit.

(実施例) 以下、図面を参照してこの発明の一実施例を説明する。 (Example) Hereinafter, with reference to the drawings illustrating an embodiment of the present invention.

第1図はその構成を示すもので、11は水平(H)偏波信号発生回路、12は垂直(V)偏波信号発生回路である。 Figure 1 is shows the configuration, 11 horizontal (H) polarization signal generating circuit, 12 is a vertical (V) polarization signal generating circuit. 各信号発生回路11,12で発生されたH偏波信号及びV偏波信号は偏波信号切換器13に入力され、レーダ繰返しパルス発生器14からのパルスによって交互に導出される。 H polarization signal and the V polarization signal generated by the respective signal generating circuits 11 and 12 are input to a polarization signal switching device 13, are derived alternately by a pulse from the radar repetition pulse generator 14. 上記切換器13から導出された信号は送信回路15で電力増幅され、送受切換器16を通じてレーダアンテナ17から送出される。 Signal derived from the switcher 13 is power-amplified by the transmission circuit 15, is sent from the radar antenna 17 via duplexer 16.

レーダ目標で反射された送信電波はレーダアンテナ17 Transmitting radio wave reflected by the radar target radar antenna 17
で捕捉され、送受切換器16を介して受信回路18に入力される。 In is captured and input to the receiving circuit 18 via the duplexer 16. この受信回路18は入力信号からH偏波面の成分及びV偏波面の成分を検波するもので、ここで得られた検波信号はアナログ/デジタル(A/D)変換回路19でデジタル信号に変換された後、分配回路20に送られる。 The receiver circuit 18 is intended for detecting the component of the component of the H-polarized wave surface from the input signal and the V-polarized wave surface, the detection signal obtained here is converted into a digital signal by an analog / digital (A / D) conversion circuit 19 after it sent to the distribution circuit 20.

この分配回路20はトリガ信号発生回路21で発生される第1のトリガ信号aによってレーダ繰返し周期毎に入力信号を振分けてH偏波面信号とV偏波面信号に分離するもので、H偏波面信号はH偏波面信号処理回路22に送られ、V偏波面信号はV偏波面信号処理回路23に送られる。 The distribution circuit 20 is intended to separate distributing an input signal to each radar repetition period by the first trigger signal a generated by the trigger signal generating circuit 21 to the H-polarized wave surface signal and the V-polarized wave surface signal, the H-polarized wave surface signals is sent to the H-polarized wave surface signal processing circuit 22, the V-polarized wave surface signals are sent to the V-polarized wave surface signal processing circuit 23. 各偏波面信号処理回路22,23にはそれぞれトリガ信号発生回路21で発生される信号処理に必要な第2、第3 Each polarization signal processing circuits 22 and 23 second required for each signal processing generated by the trigger signal generating circuit 21, the third
のトリガ信号b,cが供給される。 Trigger signal b, c are supplied.

上記H偏波面信号処理回路22、V偏波面信号処理回路 The H-polarized wave surface signal processing circuit 22, V-polarized wave surface signal processing circuit
23は共に同一構成であり、例えばH偏波面信号処理回路 23 are both the same configuration, for example, H-polarized wave surface signal processing circuit
22は第2図に示すように構成される。 22 is configured as shown in Figure 2.

第2図において、H偏波面信号は対数−直線変換回路 In FIG. 2, H-polarized wave surface signals logarithmic - linear conversion circuit
221で対数特性から直線特性の信号に変換された後、消去フィルタ222に入力される。 Converted to a signal of the linear characteristic from the logarithmic characteristic 221, is input to the cancellation filter 222. この消去フィルタ222は第2のトリガ信号bを入力する毎に入力信号からグランドクラッタ等の固定目標成分を消去して変動成分(移動目標成分)を抽出するもので、この消去フィルタ222の出力信号は平均化回路223に入力される。 The cancellation filter 222 extracts a Erase and fluctuation component (movement target component) to the fixed target components of ground clutter or the like from the input signal to each input of the second trigger signal b, the output signal of the cancellation filter 222 is input to the averaging circuit 223. この平均化回路2 The averaging circuit 2
23は第2のトリガ信号bを入力する毎に消去フィルタ22 23 cancellation filter 22 to each input of the second trigger signal b
2で得られた直線特性信号の変動成分を平均化する、つまり入力信号の複数サンプル分(サンプル数は可変)のレベルを平均してその平均レベル信号を出力するものである。 Averaging the fluctuation component of the resulting linear characteristic signals at 2, that is, multiple samples of the input signal (the number of samples is variable) are those with average levels and outputs the average level signal. 平均化回路223の出力信号は直線−対数変換回路2 The output signal of the averaging circuit 223 linear - logarithmic converter 2
24によって対数特性の信号に変換され、H偏波面処理信号として出力される。 Is converted into a signal of the logarithmic characteristic by 24, it is outputted as the H-polarized wave surface processed signal.

上記構成によるH偏波面信号処理回路22、V偏波面信号処理回路23の各処理信号は、第1図に示すように、それぞれ減算回路24に入力されると共にモード切換器25に送られる。 Each processing signals H-polarized wave surface signal processing circuit 22, V-polarized wave surface signal processing circuit 23 according to the above configuration, as shown in Figure 1, it is sent to the mode shifter 25 is inputted to each of the subtraction circuit 24. 減算回路24はH偏波面の処理信号とV偏波面の処理信号との差を演算するもので、ここで得られた差信号はモード切換器25に入力される。 Subtraction circuit 24 intended for calculating a difference between the processed signal of the processed signal and the V-polarized wave surface of the H-polarized wave surface, the difference signal obtained here is inputted to the mode switching unit 25. このモード切換器 This mode switcher
25は選択信号を与えることにより入力信号のいずれかを選択出力するもので、その出力信号は例えばPPI等の表示器26に入力され、気象目標として表示される。 25 intended for selecting and outputting one of the input signals by providing a selection signal, the output signal is input to the display device 26, for example, PPI and the like, are displayed as weather targets.

上記構成による気象レーダ装置において、以下第3図を参照してその動作について説明する。 In weather radar apparatus according to the above configuration, with reference to FIG. 3 will be described below the operation.

送信系において、H偏波信号及びV偏波信号がレーダ繰返し周期で交互に送信される。 In the transmission system, H-polarization signal and the V polarization signal are transmitted alternately by the radar repetition period. この送信電波は雲、 The transmission radio wave clouds,
雨、地表で反射され、変化を受けてレーダアンテナ17に戻る。 Rain, is reflected by the surface of the earth, back to the radar antenna 17 in response to the change. 受信回路18はこれを受信してH偏波面成分、V偏波面成分を検波する。 Receiving circuit 18 is the H-polarized wave surface component receives this, detects the V-polarized wave surface components. ここで検波された各偏波面成分は Each polarization component is detected here
A/D変換回路19によってデジタル信号に変換され、分配回路20に入力される。 The A / D converter circuit 19 is converted into a digital signal, is inputted to the distribution circuit 20.

一方、トリガ信号発生回路21は、第3図(a)、 On the other hand, the trigger signal generating circuit 21, FIG. 3 (a),
(c)、(f)に示すように、レーダ繰返し周期と同周期の第1のトリガ信号a、この第1のトリガ信号aの2 (C), (f), the first trigger signal a radar repetition period with the same period, 2 of the first trigger signal a
倍の周期の第2のトリガ信号b及び第2のトリガ信号b The second trigger signal multiple of the period b and a second trigger signal b
と同じ周期であって90゜位相の異なる第3のトリガ信号cを発生する。 It is the same period as to generate a third trigger signal c having different phase by 90 degrees.

ここで、第1のトリガ信号aについて、第3図(a) Here, the first trigger signal a, FIG. 3 (a)
に示すようにA/D変換回路19で得られるH偏波面信号及びV偏波面信号(第3図(b)にその波形を示す。但し、理解を容易にするため、アナログ波形で示す。第3 The H-polarized wave surface signal obtained by the A / D conversion circuit 19 as shown in and V polarization signal (FIG. 3 (b) shows the waveform. However, for ease of understanding, an analog waveform. The 3
図(d)、(g)も同様である。 Figure (d), is the same (g). )の各入力タイミング、つまりレーダ繰返し周期に一致するよう同期をとる。 Each input timing of), i.e. synchronized to match the radar repetition period. そして、この第1のトリガ信号aを分配回路20に入力し、このトリガ信号aのタイミングでH偏波面信号及びV偏波面信号を振分けてそれぞれH偏波面信号処理回路22、V偏波面信号処理回路23に入力する。 Then, the first trigger signal a inputted to the distributing circuit 20, respectively H-polarized wave surface signal processing circuit 22, the V-polarized wave surface signal processing distributing the H-polarized wave surface signals and the V-polarized wave surface signal at the timing of the trigger signal a is input to the circuit 23. 各偏波面信号処理回路22,23の入力波形は第3図(d),(g)に示すようになる。 Input waveform of each polarization signal processing circuits 22 and 23 FIG. 3 (d), as shown in (g).

H偏波面信号処理回路22は第2のトリガ信号bの入力と同時に入力されるH偏波面信号の信号処理を行ない、 H-polarized wave surface signal processing circuit 22 performs signal processing of the H-polarized wave surface signal inputted simultaneously with the input of the second trigger signal b,
V偏波面信号処理回路23は第3のトリガ信号cの入力と同時に入力されるV偏波面信号の信号処理を行なう。 V-polarized wave surface signal processing circuit 23 performs signal processing of the V-polarized wave surface signal inputted simultaneously with the input of the third trigger signal c. 各信号処理回路22,23の出力タイミングは第3図(e), Output timing of each signal processing circuits 22 and 23 FIG. 3 (e),
(h)に示すようになり、それぞれ入力信号からグランドクラッタ等の不要信号成分を除去し、平均化して各偏波面の信号強度情報を得る。 Becomes as shown in (h), the unnecessary signal component of the ground clutter and the like from each input signal is removed to obtain signal strength information of each polarization are averaged.

各信号処理回路22,23で得られたH,V偏波面信号強度情報はモード切換器25に入力されると共に減算回路24に入力され、この減算回路24で両情報の差成分が演算されてモード切換器245に入力される。 Was H, V-polarized wave surface signal intensity information acquired by the signal processing circuits 22 and 23 are input to the subtraction circuit 24 is inputted to the mode switching unit 25, the difference component of the two information In the subtraction circuit 24 is computed It is input to the mode switching unit 245. このモード切換器25で In this mode switcher 25
H,V偏波面信号強度情報及び差成分情報のいずれかを選択して表示器26に入力すれば、表示器26には気象目標が表示される。 H, if the input to the display device 26 by selecting one of the V-polarized wave surface signal strength information and the difference component information, weather target is displayed on the display unit 26. ここで、H,V偏波面信号強度情報を少なくともいずれか一方を選択して表示器26に入力すれば、従来と同等に気象目標とする雨及び氷(雪)の量及び地域の識別表示が可能となる。 Here, H, if the input to the V-polarized wave surface signal strength information display 26 by selecting at least one of the amount and identity of regional conventional equally rain and ice to weather targets (snow) is It can become. また、減算回路24から出力される偏波面信号強度差の演算結果を選択して表示器26に入力すれば、氷(雪)から雨になるブライトバンド及び氷(雪)と雨との識別表示が可能となる。 Further, if the input to the display device 26 to select an operation result of the polarization signal intensity difference output from the subtracting circuit 24, the ice identification of rain and bright band and ice consisting rain (snow) (snow) it is possible.

ところで、上記H偏波面信号処理回路22、V偏波面信号処理回路23は同一に構成でき、また各信号処理は互いに異なるタイミングで実行されることから、両信号を一つの偏波面信号処理回路で処理することができる。 Meanwhile, the H polarization signal processing circuit 22, V-polarized wave surface signal processing circuit 23 can be configured the same, also from being performed at different times each signal processing together with polarization signal processing circuit of one of both signals it can be processed. 第4 4th
図にその構成を示す。 Figure shows the configuration. 但し、第4図において第1図と同一部分には同一符号を付して示し、ここでは異なる部分について述べる。 However, in FIG. 1, the same parts in FIG. 4 are denoted by the same reference numerals, describes different portions here.

第4図において、トリガ信号発生回路28は前記第1及び第2のトリガ信号を生成する。 In Figure 4, the trigger signal generating circuit 28 generates the first and second trigger signals. また、前記A/D変換回路19の出力信号はH,V偏波面信号処理回路27に入力される。 The output signal of the A / D conversion circuit 19 is input H, the V-polarized wave surface signal processing circuit 27.

このH,V偏波面信号処理回路27は、第5図に示すように、対数−直線変換回路271、消去フィルタ272、平均化回路273及び直線−対数変換回路274で構成される。 The H, V-polarized wave surface signal processing circuit 27, as shown in FIG. 5, the logarithmic - linear conversion circuit 271, cancellation filter 272, an averaging circuit 273 and the straight - constituted by the logarithmic converter circuit 274. 第5 Fifth
図から明らかなように、このH,V偏波面信号処理回路27 As can be seen, the H, V-polarized wave surface signal processing circuit 27
は第2図に示した信号処理回路22あるいは23回路と基本的に同構成である。 Is a signal processing circuit 22 or 23 circuits basically the same configuration shown in Figure 2. 但し、消去フィルタ272はレーダトリガの2倍の繰返し周期の第2のトリガb(第6図(a))を入力し、1対のH,V偏波面信号毎(第6図(b))にMTIをかける。 However, cancellation filter 272 inputs the second trigger b twice repetition period of the Redatoriga (FIG. 6 (a)), a pair of H, V-polarized wave surface signals each (FIG. 6 (b)) multiplying the MTI. 平均化回路273は第1のトリガ信号a(第6図(c))を入力し、該第1のトリガ信号の入力毎に分割して、つまりH偏波面信号、V偏波面信号毎に平均化処理する。 Mean averaging circuit 273 receives the first trigger signal a (FIG. 6 (c)), is divided into each input of the first trigger signal, i.e. the H-polarized wave surface signals, each V-polarized wave surface signals the processing of. このため、H,V偏波面信号処理回路27はH,Vの両信号強度情報をペアで出力するようになる(第6図(d))。 Therefore, H, is the V-polarized wave surface signal processing circuit 27 comes to output H, both the signal strength information of the V pairs (FIG. 6 (d)). そこで、信号処理回路27の出力信号を分配回路29に入力し、第1のトリガ信号aで振り分けて、H,Vの両信号強度情報として前記モード切換器2 Therefore, the output signal of the signal processing circuit 27 to the distribution circuit 29, are distributed in a first trigger signal a, the mode shifter 2 H, both as signal strength information of the V
5及び減算回路24に入力する。 5 and inputted to the subtraction circuit 24.

すなわち、上記構成による気象レーダ装置では、第2 That is, in the weather radar system according to the above configuration, the second
のトリガ信号に基づいてH,V偏波面信号をペアで入力して信号処理し、第2のトリガ信号に基づいて信号処理によって得られたH,V信号強度情報を振分けるようにしたもので、これによれば、第1図に示したH,V偏波面信号処理回路22,23を兼用することができるので、装置の構成を簡略化かつ小型化することができる。 Those of Type H, a V-polarized wave surface signals in pairs to the signal processing based on the trigger signal, H obtained by the signal processing based on the second trigger signal, and so distributes the V signal strength information According to this, H shown in FIG. 1, it is possible to alternate the V-polarized wave surface signal processing circuits 22 and 23, can be simplified and miniaturized structure of the apparatus.

[発明の効果] 以上のようにこの発明によれば、ブライトバンドや気象目標の形状差を容易にかつ効率よく検出することのできる気象レーダ装置を提供することができる。 According as more [Effect of the Invention] This invention can provide a weather radar apparatus which can be detected with ease and efficiently a shape difference of bright band and weather targets.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

第1図はこの発明に係る気象レーダ装置の一実施例を示すブロック回路図、第2図は同実施例の偏波面信号処理回路の構成を示すブロック回路図、第3図は同実施例の動作を説明するためのタイミング図、第4図はこの発明に係る他の実施例を示すブロック回路図、第5図は同実施例の偏波面処理回路の構成を示すブロック回路図、第6図は同実施例の動作を説明するためのタイミング図である。 Block circuit diagram showing an embodiment of FIG. 1 is a weather radar apparatus according to the present invention, Figure 2 is a block circuit diagram showing a configuration of a polarization signal processing circuit of the embodiment, FIG. 3 is the same embodiment timing chart for explaining the operation, Figure 4 is a block circuit diagram showing another embodiment according to the present invention, FIG. 5 is a block circuit diagram showing a configuration of a polarization processing circuit of the embodiment, Fig. 6 is a timing diagram for explaining the operation of the embodiment. 11……H偏波信号発生回路、12……V偏波信号発生回路、13……偏波信号切換器、14……レーダ繰返しパルス発生器、15……送信回路、16……送受切換器、17……レーダアンテナ、18……受信回路、19……A/D変換回路、2 11 ...... H polarization signal generating circuit, 12 ...... V polarization signal generating circuit, 13 ...... polarization signal switching unit, 14 ...... radar repetitive pulse generator, 15 ...... transmitting circuit, 16 ...... duplexer , 17 ...... radar antenna, 18 ...... receiving circuit, 19 ...... A / D conversion circuit, 2
0……分配回路、21……トリガ信号発生回路、22……H 0 ...... distribution circuit, 21 ...... trigger signal generating circuit, 22 ...... H
偏波面信号処理回路、23……V偏波面信号処理回路、24 Polarization signal processing circuit, 23 ...... V-polarized wave surface signal processing circuit, 24
……減算回路、25……モード切換器、26……表示器、27 ...... subtraction circuit, 25 ...... mode shifter, 26 ...... Display, 27
……H,V偏波面信号処理回路、29……分配回路。 ...... H, V-polarized wave surface signal processing circuit, 29 ...... distribution circuit.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 相川 文彦 神奈川県川崎市幸区小向東芝町1番地 株式会社東芝小向工場内 (56)参考文献 特開 昭53−80194(JP,A) ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Fumihiko Aikawa Kawasaki-shi, Kanagawa-ku, Saiwai Komukaitoshiba-cho, address 1 Toshiba Corporation Komukai in the factory (56) reference Patent Sho 53-80194 (JP, a)

Claims (3)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】水平偏波、垂直偏波の各電波をレーダ繰返し周期で交互に送出する送信手段と、 この送信手段で送出される水平偏波、垂直偏波の各電波の反射波を受信する受信手段と、 この受信手段で得られる水平偏波受信信号及び垂直偏波受信信号からそれぞれ不要信号成分を除去した後、平均化して水平偏波面信号強度情報及び垂直偏波面信号強度情報を求める偏波面信号処理手段と、 この偏波面信号手段で得られる水平、垂直偏波面信号強度情報から各偏波面の平均信号強度の差を求める偏波面信号強度差演算手段と、 前記偏波面信号処理手段で得られる水平、垂直偏波面信号強度情報の少なくともいずれか一方の情報に基づいて気象目標とする雨及び氷または雪の量及び地域を識別表示し、前記偏波面信号強度差演算手段の演算結果 1. A horizontal polarized wave, the receiving and transmitting means for sending alternating each wave of vertically polarized waves in the radar repetition period, horizontal polarization is transmitted by the transmission means, the reflected waves of the respective radio wave of the vertical polarization finding a receiving means, after removal of the unwanted signal components from each horizontal polarization reception signal and the vertical polarization received signal obtained by the receiving means, a horizontal polarization signal strength information and the vertical polarization signal intensity information by averaging the a polarization signal processing means, horizontal obtained in this polarization signal means, and the polarization signal intensity difference calculating means from the vertical polarization signal strength information obtaining the difference between the average signal strength of each polarization, the polarization signal processing means horizontal obtained by, rain and ice or snow amount and area of ​​the weather target display identified based on at least one of the information of the vertical polarization signal strength information, the calculation result of the polarization signal intensity difference calculation means に基づいて氷または雪から雨になるブライトバンド及び氷または雪と雨とを識別表示する表示手段とを具備する気象レーダ装置。 Weather radar apparatus and a display means for identification and bright band and ice or snow and rain will rain from the ice or snow on the basis of.
  2. 【請求項2】前記偏波面信号処理手段は、 前記レーダ繰返し周期と同周期の第1のトリガ信号、この第1のトリガ信号の2倍の周期の第2のトリガ信号及び第2のトリガ信号と同じ周期であって90゜位相の異なる第3のトリガ信号を発生するトリガ信号発生回路と、 このトリガ信号発生回路で得られる第1のトリガし号に基づいて前記受信手段で得られる水平偏波受信信号及び垂直偏波受信信号を偏波毎に分配する分配回路と、 この分配回路から出力される水平偏波受信信号を入力し、前記第2のトリガ信号に基づいて入力信号から不要信号成分を除去した後、平均化して水平偏波面信号強度情報を求める水平偏波信号処理回路と、 この分配回路から出力される垂直偏波受信信号を入力し、前記第3のトリガ信号に基づいて入力信号から不 Wherein said polarization signal processing means, a first trigger signal of the radar repetition period with the same period, the second trigger signal and the second trigger signal 2 times the period of the first trigger signal same period in a by a trigger signal generating circuit for generating a different third trigger signals 90 ° out of phase, the horizontally polarized obtained by the receiving means based on the first trigger and No. obtained in the trigger signal generating circuit and a distribution circuit for distributing the wave reception signal and the vertical polarization received signal for each polarization, enter the horizontal polarization reception signal output from the distribution circuit, the unnecessary signal from the input signal based on the second trigger signal after removal of the component, and the horizontal polarization signal processing circuit for obtaining a horizontal polarization signal intensity information by averaging, enter the vertical polarization reception signal output from the distribution circuit, based on said third trigger signal from the input signal not 信号成分を除去した後、平均化して垂直偏波面信号強度情報を求める垂直偏波信号処理回路とを備えることを特徴とする請求項(1)記載の気象レーダ装置。 After removal of the signal component, claims, characterized in that it comprises a vertical polarization signal processing circuit for obtaining a vertical polarization signal intensity information by averaging (1) the weather radar system in accordance.
  3. 【請求項3】前記偏波面信号処理手段は、 レーダ繰返し周期と同周期の第1のトリガ信号及び第1 Wherein the polarization signal processing means, a first trigger signal and the first radar repetition period and the same cycle
    のトリガ信号の2倍の周期の第2のトリガ信号を発生するトリガ信号発生回路と、 このトリガ信号発生回路で得られる第2のトリガ信号に基づいて前記受信手段で得られる水平偏波受信信号及び垂直偏波受信信号を入力し、入力信号から不要信号成分を除去した後、前記第1のトリガ信号に基づいて両信号をそれぞれ平均化して信号強度情報を求める信号処理回路と、 前記第1のトリガ信号に基づいて前記信号処理回路で得られる信号強度情報を偏波面毎に分配出力する分配回路とを備えることを特徴とする請求項(1)記載の気象レーダ装置。 The second and the trigger signal generating circuit for generating a trigger signal, the horizontal polarization received signal obtained by the receiving means based on a second trigger signal obtained by the trigger signal generating circuit of twice the cycle of the trigger signal and enter the vertical polarization received signal, after removal of the unnecessary signal component from the input signal, a signal processing circuit for obtaining the signal strength information to respectively average the two signals based on the first trigger signal, the first claim (1) weather radar system, wherein a and a distribution circuit for distributing a signal strength information obtained by the signal processing circuit for each polarization based on the trigger signal.
JP63112269A 1988-05-09 1988-05-09 Weather radar system Expired - Lifetime JP2635679B2 (en)

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