JPS62263485A - Radar apparatus - Google Patents
Radar apparatusInfo
- Publication number
- JPS62263485A JPS62263485A JP61107210A JP10721086A JPS62263485A JP S62263485 A JPS62263485 A JP S62263485A JP 61107210 A JP61107210 A JP 61107210A JP 10721086 A JP10721086 A JP 10721086A JP S62263485 A JPS62263485 A JP S62263485A
- Authority
- JP
- Japan
- Prior art keywords
- range
- azimuth compression
- azimuth
- signal
- radar
- 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
Links
- 238000012937 correction Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000013508 migration Methods 0.000 abstract description 16
- 230000005012 migration Effects 0.000 abstract description 16
- 238000012545 processing Methods 0.000 abstract description 2
- 230000004304 visual acuity Effects 0.000 abstract 3
- 238000001228 spectrum Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 230000003595 spectral effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、地中に埋設された電気、ガス、水道１通信
等の管（パイプ）及びケーブルを探知するレーダ装置に
関するもの゛である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radar device for detecting pipes and cables for electricity, gas, water, communication, etc. buried underground.
従来のこの種のレーダ装置については、文献大西、他“
合成開口法をもちいた地中埋設物探知“昭６１．信学全
大、２９５１゜
に、また、合成開口によるアジマス圧縮の原理について
は、文献
Ｆ、 Ｔ、υ１ａｂｙ、 Ｒ，に、Ｍｏｏｒｅ、 Ａ、
に、Ｆａｎｇ″ＭｉｃｒｏｗａＶｅ Ｒｅｍｏｔｅ Ｓ
ｅｎｓｉｎｇ（Ａｃｔｉｖｅ ａｎｄ Ｐａ５ｓｉｖｅ
ど。Regarding conventional radar devices of this type, see the literature Onishi et al.
Detection of underground objects using the synthetic aperture method, 1981. IEICE University, 2951°, and the principle of azimuth compression using synthetic apertures, see References F, T, υ1aby, R, Moore, A. ,
,Fang″MicrowaVe Remote S
ensing(Active and Pa5sive
degree.
ｖｏｌ、 １． ＰＰ ５３Ｑ 〜７４５ Ａｄｄｉｓ
ｏｎ −Ｗｅｓｌｅｙ Ｐｕｂｌｅｓｈｉｎｇ Ｃｏｍ
ｐａｎｙ （１９８２） 。vol, 1. PP 53Q ~745 Addis
on -Wesley Publishing Com
pany (1982).
に、地中における電波伝搬等については、文献鈴木、他
“地中探索レーダシステム”。Regarding radio wave propagation underground, etc., see Suzuki et al.'s "Underground Search Radar System."
信学技報 ５ＡＮＥ ７９−４０ （１９７９）に詳細
に述べられている。It is described in detail in IEICE Technical Report 5ANE 79-40 (1979).
これらの文献より、従来のこの種のレーダ装置の構成を
示すならば、第一１４図で示すことができる。図中、１
１１は送信機、（２）は送信アンテナ、（３）は受信ア
ンテナ、（４１は受信機、（５１はレンジゲート手段、
（６１は記憶手段１．１８１はＦ Ｆ Ｔ （Ｆａｓｔ
ＦｏｕｒｉｅｒＴｒａｎｓｆｏｒｍ ）手段、（９１
は記憶手段２、（１（ｉ［レンジマイグレーション補正
手段、αυは記憶手段３、住り、住３は乗算手段、（１
４）ハＩ Ｐ Ｆ Ｔ （Ｉｎｖｅｒｓｅ Ｆａｓｔ
ＦＯｕｒｉｅｒ Ｔｒａｎｆｏｒｍ ）手段、（Ｉｓは
記憶手段４、＜１６１は表示手段、ｕ力は位置計測手段
、（１８１は距離計算手段、（Ｌ９は補正量−計算手段
、■はりファレシス信号発生手段、（２ＢはＦＦＴ手段
、■はスペクトルウィシドウ発生手段、のは、＋８＋
： ＋９１ 、α１．（１υ、ＣＩＬ仏謙。Based on these documents, the configuration of a conventional radar device of this type can be shown in FIG. 114. In the figure, 1
11 is a transmitter, (2) is a transmitting antenna, (3) is a receiving antenna, (41 is a receiver, (51 is a range gate means,
(61 is storage means 1.181 is F F T (Fast
FourierTransform) means, (91
is storage means 2, (1 (i [range migration correction means,
4) Inverse Fast
Fourier Transform) means, (Is is storage means 4, <161 is display means, u force is position measurement means, (181 is distance calculation means, (L9 is correction amount calculation means, ■ beam faresis signal generation means, (2B is FFT means, ■ is spectral wisdom generation means, and is +8+
: +91, α1. (1υ, CIL Buddha Ken.
（１４）１１８１．（Ｉｌ、■、Ｑ凱のから構成される
いわゆるアジマス圧縮手段である。(14)1181. (This is a so-called azimuth compression means consisting of Il, ■, and Qkai.
また、第３図はレーダのジオメトリを表す図で、■はレ
ーダ装置全体を表し、（３１）はパイプ又はケーブル等
の目標物、（３２）はアンテナ・ビームを表す。Further, FIG. 3 is a diagram showing the geometry of the radar, where ■ represents the entire radar device, (31) represents a target such as a pipe or cable, and (32) represents an antenna beam.
以下図面に従って、この檀の装置の動作を藺単に説明す
る。送信機ｉｌ＋で発生した送信パルス信号は、送信ア
ンテナ（２）を介して、送信信号ピ）として地中へ放射
される。放射された送信信号（イ）は、目標物（３１）
で反射され、受信信号（ロ）として、受信アンテナ（３
■：よって受信される。受信信号は、受信機（４）で増
幅及び検波され、ベースバンドのビデオ信号に変換され
た後、レンジゲート手段（５１により送信パルス幅相当
の距離分解能で、レンジ方向について分離され、Ａ／Ｄ
（Ａｎａｌｏｇ ｔｏ Ｄｉｇｉｔａｌ ）変換され、
記憶手段１１６■：レンジ・ビ〉番号及び送信パルス番
号に応じて、２次元的に並べられ記憶される。このとき
、送信パルス幅をτとすると、レンジ分解能ΔＲτは
ΔＢτ＝−（１）
−（Ｃ：光速）で示される。記憶手段１上Ｃ：必要なデ
ータ（受信信号）がそろった時点で、アジマス圧縮手段
のによりアジマス方向すなわちレーダ装置の進行方向の
分解能を向上させるため、合成開口処理が行われる。合
成開口法Ｉ：よるアジマス圧縮は、以下の手順で行われ
る。記憶手段１；：記憶された受信信号を各レンジ・ビ
シ毎１：、時系列信号として取出し、ＦＦＴ手段１８１
１：、より周波数領域へ変換し、記憶手段２（９Ｉへ格
納する。第４図１：示すように、目標物からの反射波は
、複数の異なるレンジ・ビンに広がって受信されるため
、同一レンジ・ビンに受信信号のスペクトル成分がそろ
うように、し〉ジマイグレーショシ補正手段αθＩ：よ
ってデータの並べ換えを行い、補正後の受信信号スペク
トルを記憶手段１３＋ （１ｍ） ｌ：、格納する。こ
のとき、並べ換えのための補正量は、レーダ装置の位置
を計測する手段性ηの出力にもとづいて、目標までの距
離Ｒｊ、ｔｌを距離計算手段（１８） ｃより求め、補
正量計算手段住優により決定される。今、第３図に示す
ように、時刻ｔ＝Ｑのときのレーダ装置（至）と目標物
（３１）との相対距離なＲＯ，レーダ装置の移動速度を
Ｖとすると、任意の時刻ｔにおける相対距離り内は、
部） ＝ ＪＲｏ２＋ （％Ｐ２）２で与えられ、瞬
時ドツプラー周波数／Ｆｌは、地中での波長λを叩いて
ｖ２１
ｆ怪）＝−ス Ｒｏ １３１
で与えられるから、Ｒとｆとの間には
の関係が成立する。よって、レンジ・ビンの移動となる
。レンジＲｅは、ΔＲτで離散化されているから、ａし
′亦τはレンジ番号４（ニ一致する。記憶手段２（９Ｉ
の各レンジ・ビンにおけるスペクトルの各周波数成分な
ｍレンジ・ビン移動させることによって、レンジマイグ
レーション補正を行い、補正後のスペクトルを記憶手段
３Ｉに格納する。The operation of this device will be briefly explained below with reference to the drawings. The transmission pulse signal generated by the transmitter il+ is radiated underground as a transmission signal P via the transmission antenna (2). The emitted transmission signal (a) is transmitted to the target object (31)
It is reflected by the receiving antenna (3) as a received signal (b).
■: Therefore, it is received. The received signal is amplified and detected by the receiver (4), converted to a baseband video signal, and then separated in the range direction by the range gate means (51) with a distance resolution equivalent to the transmission pulse width.
(Analog to Digital) converted,
Storage means 116■: Two-dimensionally arranged and stored according to the range/b> number and the transmission pulse number. At this time, when the transmission pulse width is τ, the range resolution ΔRτ is expressed as ΔBτ=−(1)−(C: speed of light). Storage means 1, top C: When the necessary data (received signals) are collected, synthetic aperture processing is performed by the azimuth compression means in order to improve the resolution in the azimuth direction, that is, in the traveling direction of the radar device. Synthetic aperture method I: Azimuth compression is performed in the following steps. Storage means 1:: Takes out the stored received signals for each range/visi as a time series signal, and FFT means 181
1: Convert it to the frequency domain and store it in the storage means 2 (9I). As shown in FIG. Therefore, data is rearranged by the migration correction means αθI so that the spectral components of the received signal are aligned in the same range bin, and the corrected received signal spectrum is stored in the storage means 13+(1m)l:. At this time, the correction amount for rearrangement is determined by calculating the distance Rj, tl to the target from the distance calculation means (18) c based on the output of the means η for measuring the position of the radar device, and calculating the correction amount calculation means (18) c. As shown in Fig. 3, let RO be the relative distance between the radar device (to) and the target (31) at time t=Q, and let V be the moving speed of the radar device. , within the relative distance at any time t is given by JRo2+ (%P2)2, and the instantaneous Doppler frequency/Fl is given by the underground wavelength λ:
Since it is given by , the following relationship holds between R and f. Therefore, the range bin will be moved. Since the range Re is discretized by ΔRτ, a′ and τ match range number 4 (2). Storage means 2 (9I
Range migration correction is performed by moving each frequency component of the spectrum in each range bin by m range bins, and the corrected spectrum is stored in the storage means 3I.
−記憶手段３響二格納された補正後の受信信号は、第３
式６：示すように、その瞬時ドツプラー周波数が時刻χ
とともＣ：変化するチャープ信号となっている。このと
き、第３式中のλ、ＲＯ，，？は既知あるいは位置計測
手段Ｃ１？）で測定可能なパラメータであるから目標＠
（３１）のドツプラー周波数の時間変化の履歴すなわ
ちドツプラーヒストリーは、距離計算手段（１８及びリ
ファレンス信号発生手段■により計算で求めることがで
きる。従って、リフアレシス信号発生手段＠で発生させ
たリファレンス信号なＦＦＴ手段＋２１１により周波数
領域に変換し、乗算手段（１３を用いて、記憶手段３Ｑ
１）に格納された受信信号スペクトルと乗算を行い、さ
らに、サイドローブ抑圧のために、スペクトルウィンド
ウ発生手段ので発生したスペクトルの重み係数を乗算手
段ａ四を用いて乗算した後、ＩＦＦＴ手段α乃により再
び時間領域１：変換すること１：より、アジマス圧縮を
完了する。ＩＦＦＴ手段α４の出力は、記憶手段４α９
に格納され、その信号強度が輝度として表示手段（１６
１上に２次元レーダ映像として表示される。- The received signal after correction stored in storage means 3
Equation 6: As shown, the instantaneous Doppler frequency is at time χ
Tomo C: A chirp signal that changes. At this time, λ,RO,,? in the third equation? Is it known or is the position measuring means C1? ) because it is a measurable parameter.
The history of the time change of the Doppler frequency in (31), that is, the Doppler history, can be calculated by the distance calculation means (18) and the reference signal generation means (■). Therefore, the reference signal generated by the reflex signal generation means @ It is converted into the frequency domain by the FFT means +211, and then stored in the storage means 3Q using the multiplication means (13).
1) is multiplied with the received signal spectrum stored in 1), and further, for sidelobe suppression, the weighting coefficient of the spectrum generated by the spectrum window generation means is multiplied using the multiplication means a4, and then the IFFT means αno Converting the time domain 1 again by 1: completes the azimuth compression. The output of the IFFT means α4 is stored in the storage means 4α9.
The signal strength is displayed as luminance on the display means (16
1 as a two-dimensional radar image.
従来のレーダ装置では、以上のよう−６：構成されてお
り、合成開口によるアジマス圧縮に、いわゆる合成開口
レーダ（人工衛星又は航空機等の飛しよう体に搭載され
、地上あるいは海面を観測する）を利用しているため次
のような問題点があった。Conventional radar equipment is configured as shown above, and a so-called synthetic aperture radar (mounted on a flying body such as an artificial satellite or aircraft to observe the ground or sea surface) is used for azimuth compression by synthetic aperture. I encountered the following problems while using it:
すなわち、この種のレーダ装置では、地中を観測対象と
するため、地上あるいは海面な観測する場合と比較して
信号の減衰が大きく、観測範囲が地中数ｍ程度であり、
パルス幅が数ｎｓと非常１：狭いため、レンジマイグレ
ーショシによるレンジ移動が大きい。レンジマイグレー
ション補正後た後のスペクトル成分の高周波成分が、上
記減衰によって失われるため、アジマス圧縮効果（圧縮
比）が低下するという問題点があった。In other words, since this type of radar equipment observes underground, the signal attenuation is greater than when observing on the ground or at the sea surface, and the observation range is approximately several meters underground.
1: Very narrow pulse width of several ns, so range movement due to range migration is large. Since the high frequency components of the spectral components after range migration correction are lost due to the above-mentioned attenuation, there is a problem that the azimuth compression effect (compression ratio) is reduced.
この発明は、上記の問題点を解消するためになされたも
ので、上記減衰による損失を補正すること舊：よって、
アジマス圧縮に寄与する周波数帯域を確保し、圧縮比を
改善することを目的とする。This invention was made in order to solve the above problems, and it is necessary to correct the loss due to the above attenuation.
The purpose is to secure a frequency band that contributes to azimuth compression and improve the compression ratio.
この発明１：係るレーダ装置は、アジマス圧縮に寄与す
る信号帯域を確保するために、レンジマイグレーション
による信号の減衰を補正する手段を付加したもので、特
許請求の範囲第１項のレーダ装置においては、時間領域
において補正を行うため、アジマス圧縮手段の前Ｉ：利
得制御手段を付加することにより、上記減衰を補正して
いる。濠だ特許請求の範囲第２項のレーダ装置じおいて
は、減衰の補正を周波数領域で行うため、スペクトルウ
ィンドウ発生手段に代えて、スペクトルウイシドウによ
る血み付けと減衰補正を同時に行うための加重係数計算
手段を付加したものである。Invention 1: The radar device according to claim 1 is provided with means for correcting signal attenuation due to range migration in order to secure a signal band contributing to azimuth compression. In order to perform correction in the time domain, the above attenuation is corrected by adding gain control means before the azimuth compression means. In the radar device according to claim 2 of the Horada patent, since the attenuation is corrected in the frequency domain, instead of the spectral window generation means, there is provided a system for simultaneously performing blood staining and attenuation correction using the spectral window generation means. A weighting coefficient calculation means is added.
この発明によるレーダ装置では、レンジマイグレーショ
ンによる高周波成分の減衰を補正しているので、アジマ
ス分解能が向上するため、地中埋設物の探知能力が向上
する。In the radar device according to the present invention, since the attenuation of high frequency components due to range migration is corrected, the azimuth resolution is improved, and the ability to detect underground objects is improved.
以下、この発明の一実施例を第１図及び第２図１：示し
、その動作を第４図から第１４図までの図面を用いて、
詳細に説明する。第′１図の（７）及び第２図のｃ！滲
は、この発明において新たに付加された利得補正手段及
び加重係数計算手段である。図中のその他の装置又は手
段は従来の装置と同等であるので、新たに付加された手
段（７）及びＣ２４）の動作を中心に、この発Ｆｆ４＋
：よるアジマス圧縮比の改善効果について述べる。Hereinafter, one embodiment of the present invention will be shown in FIGS. 1 and 2, and its operation will be explained using the drawings from FIGS. 4 to 14.
Explain in detail. (7) in Figure '1 and c! in Figure 2! A gain correction means and a weighting coefficient calculation means are newly added in this invention. Since the other devices or means in the figure are equivalent to conventional devices, we will focus on the operation of the newly added means (7) and C24) for this Ff4+
: The effect of improving the azimuth compression ratio will be described.
〔従来の技術〕で述べたように、周波数ｆと距離Ｒの間
には第４式６：示す関係が成立し、この関係を図で示す
と、第５図が得られる。地中１：おける電波伝搬を考え
た場合、ｆｉ６図に示すように受信信号パワーは、Ｒρ
に比例する。このときαは、地中の導電率σ、地中
の誘電率ε及び地中の透磁率声を用いて
α＝！！Ｊ １６１ｇ
で表現できる。よって、レンジマイグレーション補正後
のパワースペクトルは、第７図に示すよう薯二高周波成
分程パワーが低下する。そこで、利得制御手段（７）に
より、第８図に示すように、利得Ｇを、
ａ ＝ Ｒ’ｆＲ１７１
とすれば、受信信号パワーは第９図鴫二示すようにＲと
は無関係にできるから、レンジマイグレーション補正後
のパワースペクトルは第１０図に示すようにパルス繰返
し周波数で決まる帯域内全体で一定値を取り、高周波成
分の減衰が補正されたこと蛎：なる。このとき、帯域幅
をＢとすれば、アジマス方向の分解能Δｒは
Δｒ＝ 二 （８）となる。As described in [Prior Art], the relationship shown in Equation 4 (6) holds between the frequency f and the distance R, and when this relationship is illustrated in a diagram, FIG. 5 is obtained. When considering radio wave propagation underground 1:, the received signal power is Rρ as shown in figure fi6.
is proportional to. At this time, α can be calculated using the underground conductivity σ, the underground permittivity ε, and the underground magnetic permeability. ! It can be expressed as J 161g. Therefore, in the power spectrum after range migration correction, as shown in FIG. 7, the power decreases as the frequency component increases. Therefore, if the gain control means (7) is used to set the gain G to a = R'fR171 as shown in Fig. 8, the received signal power can be made independent of R as shown in Fig. 9. As shown in FIG. 10, the power spectrum after range migration correction takes a constant value throughout the band determined by the pulse repetition frequency, indicating that the attenuation of high frequency components has been corrected. At this time, if the bandwidth is B, the resolution Δr in the azimuth direction is Δr=2 (8).
但し、第１０図のスペクトルをＩＦＦ’Ｔにより時間領
域へ変換すると、サイドロープが発生し、儀像の原因と
なるので、通常第１１図（二示すようにスペクトルウィ
ンドウと呼ばれる重み付けがなされた後、ＩＦＦＴを行
い、アジマス圧縮を完了する。However, when the spectrum in Figure 10 is converted to the time domain using IFF'T, side lobes will occur, causing artifacts. , IFFT is performed and azimuth compression is completed.
以上のｇＱ明では、レンジマイグレーション１：よる受
信信号の高周波成分の減衰を利得補正手段（７）゛
を用いて、時間領域で行う方法について述べたが、同
様の補正を周波数領域で行うこともできる。In the above gQ method, range migration 1: Attenuates the high frequency components of the received signal by the gain correction means (7).
Although we have described a method performed in the time domain using , similar correction can also be performed in the frequency domain.
利得補正を行わない場合、そのスペクトルは％７図に示
すように高周波成分の損失が大きい。そこで、通常のス
ペクトルウィンドウとは逆に第１２図のように為周波成
分を強調するような加重係数を加重係数計算手段（２４
により求め、受信信号（二乗算することにより、第１３
図に示すよう！＝利得補正を行った場合と同等のスペク
トルが得られる。When gain correction is not performed, the spectrum has a large loss in high frequency components as shown in the %7 diagram. Therefore, contrary to the normal spectral window, a weighting coefficient that emphasizes the frequency component as shown in FIG.
and the received signal (by multiplying by square, the 13th
As shown in the diagram! = A spectrum equivalent to that obtained when gain correction is performed.
周波数領域で補正を行うことにより、レンジマイグレー
ションによる高周波成分の減衰補正とスペクトルウィン
ドウによる重み付けとを同時（；行うことができる。。By performing correction in the frequency domain, attenuation correction of high frequency components by range migration and weighting by spectral window can be performed simultaneously.
以上のように、この発明１：よれば、レンジマイグレー
ションによる受信信号の高周波成分の減衰を補正するこ
とにより、アジマス圧縮！＝寄与する信号帯域を確保し
、アジマス分解能を向上させることができる。As described above, according to the present invention 1, azimuth compression is achieved by correcting the attenuation of high frequency components of the received signal due to range migration! = It is possible to secure a contributing signal band and improve azimuth resolution.
第１図及び第２図はこの発明の一実施例にょるレーダ装
置の構成図、第３図はレーダ装置のジオメトリ、第４図
及び第５図はレンジマイグレーションの説明図、第６図
はレーダ装置から目標物までの相対距離Ｒと受信信号の
パワーとの関係を示す図、′ｉ４７図から第１３図まで
はこの発明のレーダ装置によるアジマス圧縮比の改善を
説明するための図、％１４図は従来のレーダ装置の構成
図である。
図中、（１１は送信機、（２；は送信アンテナ、に３１
は受信アンテナ、（４）は受信機、１５１はレンジゲー
ト手段、（６）は記憶手段１ 、１７１は利得補正手段
、（８１はＦＦ’Ｔ手段、１９１は記憶手段２、凹はレ
ンジマイグレーション補正手段、Ｕυは記憶手段３．（
ＩＬ（１３は乗算手段、（ｌ滲はＩＦＦＴ手段、ＣＩＳ
は記憶手段４、霞は表示手段、（Ｉ７）は位置計測手段
、鰻は距離計算手段、（ＩＩは補正量計算手段、■はリ
ファレンス信号発生手段、砺はＦＦＴ手段、のはスペク
トルウィンドウ発生手段、（２３はアジマス圧縮手段、
＠は加重係数計算手段、（イ）は送信信号、（ロ）は受
信信号である。
なお、図中同一符号は同−又は相当部分な示す。1 and 2 are configuration diagrams of a radar device according to an embodiment of the present invention, FIG. 3 is a geometry of the radar device, FIGS. 4 and 5 are illustrations of range migration, and FIG. 6 is a diagram of the radar device. A diagram showing the relationship between the relative distance R from the device to the target and the power of the received signal, 'i47 to 13 are diagrams for explaining the improvement of the azimuth compression ratio by the radar device of the present invention, %14 The figure is a configuration diagram of a conventional radar device. In the figure, (11 is a transmitter, (2; is a transmitting antenna, and 31
is the receiving antenna, (4) is the receiver, 151 is the range gate means, (6) is the storage means 1, 171 is the gain correction means, (81 is the FF'T means, 191 is the storage means 2, and the concave is the range migration correction means, Uυ is storage means 3.(
IL (13 is a multiplication means, (1 is an IFFT means, CIS
is the storage means 4, Kasumi is the display means, (I7) is the position measurement means, Eel is the distance calculation means, (II is the correction amount calculation means, ■ is the reference signal generation means, Toko is the FFT means, and is the spectrum window generation means) , (23 is azimuth compression means,
@ is a weighting coefficient calculation means, (a) is a transmitted signal, and (b) is a received signal. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (2)
ス、水道、通信等の管及びケーブルを探知するレーダ装
置において、送信機及び送信アンテナと受信機及び受信
アンテナとレンジゲート手段とレンジゲート手段によつ
て送信パルス幅で決まるレンジ分解能で分解された受信
信号を送信パルス番号順に２次元的に記憶する記憶手段
と、合成開口によりアジマス圧縮を行うアジマス圧縮手
段と、記憶手段とアジマス圧縮手段の間にあつてアジマ
ス圧縮比を改善する利得補正手段と、アジマス圧縮後の
レーダ映像を記憶する記憶手段と記憶手段の内容を表示
する表示手段と位置計測手段を具備したことを特徴とす
るレーダ装置。(1) In a radar device that uses the synthetic aperture method to detect underground electricity, gas, water, communication, etc. pipes and cables, a transmitter, a transmitting antenna, a receiver, a receiving antenna, and a range gate means. storage means for two-dimensionally storing the received signal resolved by the range gate means with a range resolution determined by the transmission pulse width in the order of transmission pulse numbers; azimuth compression means for performing azimuth compression using a synthetic aperture; It is characterized by comprising a gain correction means for improving the azimuth compression ratio between the azimuth compression means, a storage means for storing the radar image after azimuth compression, a display means for displaying the contents of the storage means, and a position measuring means. radar equipment.
代えて、同等の機能をアジマス圧縮手段内の加重係数計
算手段によつて実現することを特徴とするレーダ装置。(2) A radar apparatus according to item 1, characterized in that, in place of the gain correction means, an equivalent function is realized by weighting coefficient calculation means in the azimuth compression means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61107210A JPS62263485A (en) | 1986-05-09 | 1986-05-09 | Radar apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61107210A JPS62263485A (en) | 1986-05-09 | 1986-05-09 | Radar apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62263485A true JPS62263485A (en) | 1987-11-16 |
Family
ID=14453273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61107210A Pending JPS62263485A (en) | 1986-05-09 | 1986-05-09 | Radar apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62263485A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01113685A (en) * | 1987-10-28 | 1989-05-02 | Nippon Telegr & Teleph Corp <Ntt> | Object detecting method and apparatus |
| JP2011169869A (en) * | 2010-02-22 | 2011-09-01 | Mitsubishi Electric Corp | Apparatus for processing radar signal |
| WO2023089713A1 (en) * | 2021-11-18 | 2023-05-25 | 三菱電機株式会社 | Radar signal processing device, radar signal processing method, and target observation system |
-
1986
- 1986-05-09 JP JP61107210A patent/JPS62263485A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01113685A (en) * | 1987-10-28 | 1989-05-02 | Nippon Telegr & Teleph Corp <Ntt> | Object detecting method and apparatus |
| JP2011169869A (en) * | 2010-02-22 | 2011-09-01 | Mitsubishi Electric Corp | Apparatus for processing radar signal |
| WO2023089713A1 (en) * | 2021-11-18 | 2023-05-25 | 三菱電機株式会社 | Radar signal processing device, radar signal processing method, and target observation system |
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