JPH11231047A - Radar device - Google Patents
Radar deviceInfo
- Publication number
- JPH11231047A JPH11231047A JP10032997A JP3299798A JPH11231047A JP H11231047 A JPH11231047 A JP H11231047A JP 10032997 A JP10032997 A JP 10032997A JP 3299798 A JP3299798 A JP 3299798A JP H11231047 A JPH11231047 A JP H11231047A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- unit
- frequency
- phase
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、レーダの送信周
波数を広帯域にわたってステップ状に変化させ、距離分
解能を向上させる帯域合成処理を用いて、目標までの距
離とそのレンジプロフィールを取得するレーダ装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar apparatus for acquiring a distance to a target and a range profile thereof by using a band synthesis process for changing a radar transmission frequency in a wide band over a wide band and improving a distance resolution. Things.
【０００２】[0002]
【従来の技術】図３と図４は従来のレーダ装置と運用図
を示すものである。１はレーダ装置、２は目標、３は送
信信号を目標に向けて放射し、目標２からの反射波を受
けるアンテナ部、４は送受信切換信号により送信信号と
受信信号の切り換える送受信切換部、５は送信周波数信
号を増幅する送信部、６は送信周波数設定信号により送
信周波数信号とローカル信号を出力する発振部、７は受
信信号をローカル信号により周波数変換、増幅、位相検
波したビデオ信号を出力する距離系受信部、８はビデオ
信号をディジタル信号に変換するＡ／Ｄ変換部、９は送
受信切換信号と送信周波数設定信号を出力するタイミン
グ発生部、１０はディジタル信号を逆周波数解析し距離
方向に分解された目標のレンジプロフィールを演算する
帯域合成部、１１は目標までの距離と目標のレンジプロ
フィールを表示する表示部である。2. Description of the Related Art FIGS. 3 and 4 show a conventional radar apparatus and an operation diagram. 1 is a radar device, 2 is a target, 3 is an antenna unit that radiates a transmission signal toward the target and receives a reflected wave from the target 2, 4 is a transmission / reception switching unit that switches between a transmission signal and a reception signal by a transmission / reception switching signal, 5 Is a transmitting unit for amplifying a transmission frequency signal, 6 is an oscillating unit for outputting a transmission frequency signal and a local signal according to a transmission frequency setting signal, and 7 is a video signal obtained by frequency-converting, amplifying, and phase-detecting a received signal by a local signal. A distance system receiving unit, 8 is an A / D converting unit for converting a video signal into a digital signal, 9 is a timing generating unit for outputting a transmission / reception switching signal and a transmission frequency setting signal, and 10 is an inverse frequency analysis of the digital signal and is performed in a distance direction. A band synthesis unit 11 for calculating the decomposed target range profile is a display unit for displaying the distance to the target and the target range profile.
【０００３】この動作を図３と図４に基づいて説明す
る。図４の（ａ）は運用を示すもので、１はレーダ装
置、Ｔ１は固定目標、Ｔ２はレーダ装置に接近する移動
目標を示す。レーダ装置１のタイミング発生部９より送
信信号の周波数を発振部６に設定する。この送信信号を
送信部５で増幅し、送受信切換部４、アンテナ部３を経
て目標に向けて放射する。送信信号を図４（ｂ）に示
す。各々の送信周波数ｆ１〜ｆＮに設定された送信信号
パルス例の目標からの反射をアンテナ部３で受信する。
目標ＴＩ、Ｔ２の受信信号を図４（ｃ）に示す。受信信
号は、距離系受信部で周波数変換、増幅、位相検波し、
Ａ／Ｄ変換部でディジタル信号に変換する。ディジタル
信号を帯域合成部で逆周波数解析を行い、図４（ｄ）に
示すＳ１は目標Ｔ１の、Ｓ２２は目標Ｔ２の距離方向に
分解された目標のレンジプロフィールを表示する。The operation will be described with reference to FIGS. 3 and 4. FIG. 4 (a) shows the operation, wherein 1 is a radar device, T1 is a fixed target, and T2 is a moving target approaching the radar device. The frequency of the transmission signal is set in the oscillation unit 6 by the timing generation unit 9 of the radar device 1. The transmission signal is amplified by the transmission unit 5 and radiated toward the target via the transmission / reception switching unit 4 and the antenna unit 3. The transmission signal is shown in FIG. The antenna section 3 receives reflections of the transmission signal pulse examples set at the respective transmission frequencies f1 to fN from the target.
FIG. 4C shows the reception signals of the targets TI and T2. The received signal is frequency-converted, amplified, and phase-detected by the distance-based receiver,
The signal is converted into a digital signal by an A / D converter. The digital signal is subjected to inverse frequency analysis by a band synthesis unit, and S1 shown in FIG. 4D shows the target T1 and S22 shows the target range profile decomposed in the distance direction of the target T2.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来のレ
ーダ装置では、図４に示すとおり、移動目標Ｔ２は
（ｄ）の帯域合成処理後のレンジプロフィールは、移動
によるドップラ周波数の影響により実際のＳ２１の距離
ではなく、移動速度分だけずれたＳ２２の距離に表示さ
れる。すなわち、固定目標Ｔ１の場合は、正しい距離Ｓ
１に目標Ｔ１のレンジプロフィールが得られるが、移動
目標Ｔ２の場合は実際の距離と違った距離に目標のレン
ジプロフィールが得られるという問題がある。In the conventional radar apparatus as described above, as shown in FIG. 4, the moving target T2 has a range profile after the band synthesis processing of (d) due to the effect of the Doppler frequency due to the movement. Is displayed not at the distance of S21 but at the distance of S22 shifted by the moving speed. That is, in the case of the fixed target T1, the correct distance S
1, the range profile of the target T1 is obtained, but in the case of the moving target T2, there is a problem that the target range profile is obtained at a distance different from the actual distance.
【０００５】この発明は、かかる問題点を解決するため
になされたものであり、レーダ装置が目標の距離とその
レンジプロフィールを取得する際に、固定、移動目標に
関わらず、目標の距離な位置のレンジプロフィールを取
得することができ、この結果を表示することに利用する
ものである。The present invention has been made to solve such a problem. When a radar apparatus obtains a target distance and a range profile thereof, the position of the target distance can be determined regardless of whether the target is fixed or moving. Can be obtained and used to display the result.
【０００６】[0006]
【課題を解決するための手段】第１の発明によるレーダ
装置は、速度計測モードと距離計測モードを切り換える
モード切換信号を出力するモード制御部と、モード切換
信号により送受信切換信号と送信周波数設定信号を出力
するタイミング発生部と、送受信切換信号と送信周波数
設定信号により送信周波数信号とローカル信号を出力す
る発振部と、送信周波数信号を増幅した送信信号を出力
する送信部と、送受信切換信号により送受信を切り換え
る送受信切換部と、送受信切換部から出力された送信信
号を送信波として空間に放射し、目標からの反射波を受
信するアンテナ部と、モード制御部からのモード切換信
号が速度計測モードの場合、アンテナ部で受けた反射波
の受信信号を周波数変換、増幅、位相検波したビデオ信
号を出力する速度系受信部と、モード制御部からのモー
ド切換信号が距離計測モードの場合、アンテナ部で受け
た反射波の受信信号を位相補償部から出力されたローカ
ル補正信号により周波数変換、増幅、位相検波したビデ
オ信号をＡ／Ｄ変換部に出力する距離系受信部と、速度
系受信部と距離系受信部からのビデオ信号をディジタル
信号に変換するＡ／Ｄ変換部と、ディジタル信号を逆周
波数解析し距離方向に分解された目標のレンジプロフィ
ールを演算する帯域合成部と、高距離分解されたレンジ
プロフィールを表示する表示部と、ディジタル信号を周
波数解析しドップラ周波数を演算するドップラ演算部
と、ドップラ演算部からのドップラ周波数により位相を
演算する位相演算部と、位相演算部からの位相によりロ
ーカル信号を補正する位相補正部を備えたレーダ装置
で、移動目標のドップラ周波数を速度計測モードで計測
し、ドップラ周波数に対する位相を演算する。この位相
を用いて距離計測モードで受信信号を補正することによ
り正確な距離とそのレンジプロフィールを取得する手段
を有する。According to a first aspect of the present invention, there is provided a radar apparatus which outputs a mode switching signal for switching between a speed measurement mode and a distance measurement mode, a transmission / reception switching signal and a transmission frequency setting signal based on the mode switching signal. A generator that outputs a transmission frequency signal and a local signal according to a transmission / reception switching signal and a transmission frequency setting signal; a transmission unit that outputs a transmission signal obtained by amplifying the transmission frequency signal; , A transmission signal output from the transmission / reception switching unit is radiated into space as a transmission wave, an antenna unit receives a reflected wave from the target, and a mode switching signal from the mode control unit is a speed measurement mode. In the case, the speed at which the video signal obtained by frequency conversion, amplification and phase detection of the received signal of the reflected wave received by the antenna unit is output When the mode switching signal from the receiving unit and the mode control unit is the distance measurement mode, the video signal obtained by frequency-converting, amplifying, and phase-detecting the received signal of the reflected wave received by the antenna unit using the local correction signal output from the phase compensating unit. A distance system receiving unit for outputting a signal to an A / D converter, an A / D converter for converting video signals from the speed system receiving unit and the distance system receiving unit into a digital signal, and an inverse frequency analysis of the digital signal to obtain a distance A band synthesis unit that calculates a target range profile resolved in a direction, a display unit that displays a range profile that has been resolved at a high distance, a Doppler calculation unit that analyzes the frequency of a digital signal and calculates a Doppler frequency, and a Doppler calculation unit A phase calculator that calculates the phase based on the Doppler frequency from the controller, and a phase corrector that corrects the local signal based on the phase from the phase calculator. In the radar apparatus, the Doppler frequency of the moving target measured by speed measurement mode, calculates the phase of Doppler frequency. There is provided a means for acquiring an accurate distance and its range profile by correcting the received signal in the distance measurement mode using this phase.
【０００７】また、第２の発明による誘導装置は、速度
計測モードと距離計測モードを切り換えるモード切換信
号を出力するモード制御部と、モード切換信号により送
受信切換信号と送信周波数設定信号を出力するタイミン
グ発生部と、送受信切換信号と送信周波数設定信号によ
り送信周波数信号とローカル信号を出力する発振部と、
送信周波数信号を増幅した送信信号を出力する送信部
と、送受信切換信号により送受信を切り換える送受信切
換部と、送受信切換部から出力された送信信号を送信波
として空間に放射し、目標からの反射波を受けるアンテ
ナ部と、モード制御部からのモード切換信号が速度計測
モードの場合、アンテナ部で受けた反射波の受信信号を
周波数変換、増幅、位相検波したビデオ信号を出力する
速度系受信部と、モード制御部からのモード切換信号が
距離計測モードの場合、アンテナ部で受けた反射波の受
信信号を発振部から出力されたローカル信号により周波
数変換、増幅、位相検波したビデオ信号をＡ／Ｄ変換部
に出力する距離系受信部と、速度系受信部と距離系受信
部からのビデオ信号をディジタル信号に変換するＡ／Ｄ
変換部と、ディジタル信号を逆周波数解析し距離方向に
分解された目標のレンジプロフィールを演算する帯域合
成部と、高距離分解されたレンジプロフィールを表示す
る表示部と、ディジタル信号を周波数解析しドップラ周
波数を演算するドップラ演算部と、ドップラ演算部から
のドップラ周波数により位相を演算する位相演算部と、
位相演算部からの位相によりディジタル信号を補正する
ディジタル位相補正部とを備えたレーダ装置で、移動目
標のドップラ周波数を速度計測モードで計測し、ドップ
ラ周波数に対する位相を演算する。この位相を用いて距
離計測モードで受信信号をディジタル信号に対して補正
することにより、目標の正確な距離とそのレンジプロフ
ィールを取得する手段を有する。The guidance device according to the second aspect of the present invention provides a mode control unit for outputting a mode switching signal for switching between a speed measurement mode and a distance measurement mode, and a timing for outputting a transmission / reception switching signal and a transmission frequency setting signal based on the mode switching signal. A generator, an oscillator that outputs a transmission frequency signal and a local signal according to a transmission / reception switching signal and a transmission frequency setting signal,
A transmission unit that outputs a transmission signal obtained by amplifying a transmission frequency signal, a transmission / reception switching unit that switches between transmission and reception by a transmission / reception switching signal, and a transmission signal output from the transmission / reception switching unit is radiated into space as a transmission wave and reflected from a target. An antenna unit for receiving, and a speed system receiving unit for outputting a video signal obtained by frequency-converting, amplifying, and phase-detecting the received signal of the reflected wave received by the antenna unit when the mode switching signal from the mode control unit is in the speed measurement mode. When the mode switching signal from the mode control unit is in the distance measurement mode, a video signal obtained by frequency-converting, amplifying, and phase-detecting a received signal of a reflected wave received by the antenna unit using a local signal output from the oscillation unit is A / D-converted. A distance system receiving unit that outputs to a conversion unit, and an A / D that converts video signals from the speed system receiving unit and the distance system receiving unit into digital signals.
A conversion unit, a band synthesis unit that performs inverse frequency analysis of the digital signal to calculate a target range profile decomposed in the distance direction, a display unit that displays the range profile decomposed at a high distance, and a Doppler that performs frequency analysis on the digital signal. A Doppler calculator for calculating a frequency, a phase calculator for calculating a phase based on the Doppler frequency from the Doppler calculator,
A radar apparatus having a digital phase correction unit for correcting a digital signal based on a phase from a phase calculation unit, measures a Doppler frequency of a moving target in a speed measurement mode, and calculates a phase with respect to the Doppler frequency. There is provided a means for acquiring an accurate target distance and its range profile by correcting the received signal with respect to the digital signal in the distance measurement mode using this phase.
【０００８】[0008]
【発明の実施の形態】実施の形態１．図１はこの発明の
実施の形態１を示す構成図である。図１において、従来
の構成図である図３に対する新規部分として、モード制
御部１２と速度系受信部１３とドップラ計測部１４と位
相演算部１５と位相補正部１６である。１２は目標のド
ップラ周波数を計測する速度計測モードと目標のレンジ
プロフィールと距離を計測する距離計測モードを切り換
えるモード切換信号を生成するモード切換部、１３はモ
ード切換部から速度計測モードを指令された際に動作
し、周波数変換、増幅、位相検波し目標のドップラ情報
が信号処理後得られるビデオ信号を出力する速度系受信
部、１４は、Ａ／Ｄ変換部８からのディジタル信号を周
波数解析し、目標のドップラ周波数を演算するドップラ
演算部、１５はドップラ演算部１４からの出力である目
標のドップラ周波数から位相を演算する位相演算部、１
６は位相演算部１５の出力である位相補正量と送信設定
周波数の切り換わりによってローカル補正信号を発生す
る位相補正部である。その他の構成は従来と同等であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram showing Embodiment 1 of the present invention. In FIG. 1, a mode control unit 12, a speed system reception unit 13, a Doppler measurement unit 14, a phase calculation unit 15, and a phase correction unit 16 are new parts with respect to FIG. Reference numeral 12 denotes a mode switching unit for generating a mode switching signal for switching between a speed measurement mode for measuring a target Doppler frequency and a distance measurement mode for measuring a target range profile and a distance. Reference numeral 13 denotes a speed measurement mode from the mode switching unit. A speed system receiving unit that operates at the time and outputs a video signal in which frequency conversion, amplification, phase detection and target Doppler information are obtained after signal processing, a frequency analysis of a digital signal from the A / D conversion unit 8; , A Doppler calculator that calculates a target Doppler frequency, 15 is a phase calculator that calculates a phase from a target Doppler frequency output from the Doppler calculator 14,
Reference numeral 6 denotes a phase correction unit that generates a local correction signal by switching between the phase correction amount output from the phase calculation unit 15 and the transmission set frequency. Other configurations are the same as those of the related art.
【０００９】この動作を図１に基づき説明する。図１に
おいてモード制御部１２で速度計測モードに設定する。
速度計測モードで速度系受信部１３が動作する。タイミ
ング発生部９から発振部６へ送信周波数設定信号を出力
し、発振部６からの送信周波数信号を送信部５で増幅さ
れた送信信号が送受信切換部４を経て、アンテナ部３か
ら空間に送信する。空間に送信され目標２からの反射波
をアンテナ部３で受信し、送受信切換部４を経て速度系
受信部１３によって周波数変換、増幅、位相検波したビ
デオ信号を生成する。ビデオ信号をＡ／Ｄ変換部８によ
ってディジタル信号に変換し、ドップラ演算部におい
て、目標２のドップラ周波数を演算しそのドップラ周波
数から位相演算部１５で位相を演算する。目標２のドッ
プラ周波数を計測した後、モード制御部１２で距離計測
モードにモードを切り換える。距離計測モードで距離系
受信部が動作する。タイミング発生部９から発振部６へ
送信周波数を送信パルスごとに切り換える送信周波数設
定信号を出力し、発振部６からの送信周波数信号を送信
部５で増幅された送信信号が送受信切換部４を経て、ア
ンテナ部３から目標に向けて送信する。目標２からの反
射波をアンテナ部３で受信し、送受信切換部４を経て距
離系受信部７で周波数変換、増幅、位相検波したビデオ
信号を生成する。ビデオ信号をＡ／Ｄ変換部８によって
ディジタル信号に変換し、送信パルスごとに異なってい
る送信周波数に対応する受信信号を帯域合成部１０によ
って逆周波数解析することによりレンジプロフィールを
生成し、表示する。その際、前記速度計測モードであら
かじめ計測した目標２のドップラ周波数による位相を位
相補正部１６によって発振部６からのローカル信号を補
正する。位相補正部１６で補正されたローカル補正信号
を用いて距離系受信部７で周波数変換することにより、
移動目標のドップラ周波数を距離系受信部７で補正でき
るため、移動目標の正確な距離とそのレンジプロフィー
ルを表示することができる。This operation will be described with reference to FIG. In FIG. 1, the mode control unit 12 sets the speed measurement mode.
The speed system receiving unit 13 operates in the speed measurement mode. The transmission frequency setting signal is output from the timing generation section 9 to the oscillation section 6, and the transmission signal amplified by the transmission section 5 from the oscillation section 6 is transmitted to the space from the antenna section 3 via the transmission / reception switching section 4. I do. A reflected wave transmitted from the target 2 and transmitted from the target 2 is received by the antenna unit 3, passed through the transmission / reception switching unit 4, and subjected to frequency conversion, amplification, and phase detection by the speed system receiving unit 13 to generate a video signal. The video signal is converted into a digital signal by the A / D converter 8, the Doppler calculator calculates the Doppler frequency of the target 2, and the phase calculator 15 calculates the phase from the Doppler frequency. After measuring the Doppler frequency of the target 2, the mode control unit 12 switches the mode to the distance measurement mode. The distance receiving unit operates in the distance measurement mode. A transmission frequency setting signal for switching the transmission frequency for each transmission pulse is output from the timing generation section 9 to the oscillation section 6, and the transmission signal amplified by the transmission section 5 from the transmission frequency signal from the oscillation section 6 passes through the transmission / reception switching section 4. , From the antenna unit 3 toward the target. The reflected wave from the target 2 is received by the antenna unit 3, passed through the transmission / reception switching unit 4, and generated by the distance system receiving unit 7 by frequency conversion, amplification, and phase detection. The video signal is converted into a digital signal by the A / D converter 8, and a received signal corresponding to a different transmission frequency for each transmission pulse is subjected to inverse frequency analysis by the band synthesizer 10 to generate and display a range profile. . At that time, the local signal from the oscillation unit 6 is corrected by the phase correction unit 16 for the phase based on the Doppler frequency of the target 2 measured in advance in the speed measurement mode. By using the local correction signal corrected by the phase correction unit 16 to perform frequency conversion by the distance system reception unit 7,
Since the Doppler frequency of the moving target can be corrected by the distance receiving unit 7, the accurate distance of the moving target and its range profile can be displayed.
【００１０】このような構成をとることによって、図４
の運用図の（ａ）に示す移動目標のレンジプロフィール
を取得する際の距離ずれが生じる問題が、図４の（ｄ）
に示すように移動目標の正確な距離のレンジプロフィー
ルを取得することが可能となる。よって、移動目標のレ
ンジプロフィールを取得する際の距離ずれを補正するこ
とができ、移動目標の正確な距離のレンジプロフィール
を表示することが可能になる。By adopting such a configuration, FIG.
The problem that the distance shift occurs when acquiring the range profile of the moving target shown in FIG.
It is possible to acquire a range profile of an accurate distance of the moving target as shown in FIG. Therefore, it is possible to correct the distance deviation when acquiring the range profile of the moving target, and it is possible to display the range profile of the accurate distance of the moving target.
【００１１】実施の形態２．図２はこの発明の実施の形
態２を示す構成図である。図２において、従来の構成で
ある図３に対する新規部分として、モード制御部１２と
速度系受信部１３とドップラ計測部１４と位相演算部１
５とディジタル位相補正部１７である。１２は目標のド
ップラ周波数を計測する速度計測モードと目標のレンジ
プロフィールと距離を計測する距離計測モードを切り換
えるモード切換信号を生成するモード切換部、１３はモ
ード切換部から速度計測モードを指令された際に動作
し、周波数変換、増幅、位相検波し目標のドップラ情報
が信号処理後得られるビデオ信号を出力する速度系受信
部、１４は、Ａ／Ｄ変換部８からのディジタル信号を周
波数解析し、目標のドップラ周波数を演算するドップラ
演算部、１５はドップラ演算部１４からの出力である目
標のドップラ周波数から位相を演算する位相演算部、１
７は位相演算部１５の出力である位相補正量を距離計測
モードの際に受信信号に対して補正する位相補正部であ
る。その他の構成は従来と同等である。Embodiment 2 FIG. 2 is a configuration diagram showing a second embodiment of the present invention. 2, a mode control unit 12, a speed system reception unit 13, a Doppler measurement unit 14, and a phase calculation unit 1 are added to FIG.
5 and a digital phase correction unit 17. Reference numeral 12 denotes a mode switching unit for generating a mode switching signal for switching between a speed measurement mode for measuring a target Doppler frequency and a distance measurement mode for measuring a target range profile and a distance, and 13 denotes a speed measurement mode from the mode switching unit. A speed system receiving unit that operates at the time and outputs a video signal in which frequency conversion, amplification, phase detection and target Doppler information are obtained after signal processing, a frequency analysis of a digital signal from the A / D conversion unit 8; , A Doppler calculator that calculates a target Doppler frequency, 15 is a phase calculator that calculates a phase from a target Doppler frequency output from the Doppler calculator 14,
Reference numeral 7 denotes a phase correction unit that corrects a phase correction amount output from the phase calculation unit 15 with respect to a received signal in the distance measurement mode. Other configurations are the same as those of the related art.
【００１２】この動作を図２に基づき説明する。図２に
おいてモード制御部１２で速度計測モードに設定する。
速度計測モードで速度系受信部１３が動作する。タイミ
ング発生部９から発振部６へ送信周波数設定信号を出力
し、発振部６からの送信周波数信号を送信部５で増幅さ
れた送信信号が送受信切換部４を経て、アンテナ部３か
ら目標に向けて送信する。目標２からの反射波をアンテ
ナ部３で受信し、送受信切換部４を経て速度系受信部１
３によって周波数変換、増幅、位相検波したビデオ信号
を生成する。ビデオ信号をＡ／Ｄ変換部８によってディ
ジタル信号に変換し、ドップラ演算部において、目標２
のドップラ周波数を演算しそのドップラ周波数から位相
演算部１５で位相を演算する。目標２のドップラ周波数
を計測した後、モード制御部１２で距離計測モードにモ
ードを切り換える。距離計測モードで距離系受信部が動
作する。タイミング発生部９から発振部６ヘ送信周波数
を送信パルスごとに切り換える送信周波数設定信号を出
力し、発振部６からの送信周波数信号を送信部５で増幅
された送信信号が送受信切換部４を経て、アンテナ部３
から目標に向けて送信する。目標２からの反射波をアン
テナ部３で受信し、送受信切換部４を経て距離系受信部
７で周波数変換、増幅、位相検波したビデオ信号を生成
する。ビデオ信号をＡ／Ｄ変換部８によってディジタル
信号に変換し、送信パルスごとに異なっている送信周波
数に対応する受信信号を帯域合成部１０によって逆周波
数解析することによりレンジプロフィールを生成し、表
示する。その際、前記速度計測モードであらかじめ計測
した目標２のドップラ周波数による位相を帯域合成部１
０で逆周波数解析する前にディジタル位相補正部１７に
よって各送信周波数に対応する受信信号をあらかじめデ
ィジタル位相補正部１７内に保持しているドップラ周波
数に対応する受信信号の補正データと加算することによ
り補正する。従って、移動目標のドップラ周波数をＡ／
Ｄ変換後の受信信号に補正することにより、目標との距
離とそのレンジプロフィールを正確な距離に表示するこ
とができる。This operation will be described with reference to FIG. In FIG. 2, the mode control unit 12 sets the speed measurement mode.
The speed system receiving unit 13 operates in the speed measurement mode. A transmission frequency setting signal is output from the timing generation section 9 to the oscillation section 6, and the transmission signal obtained by amplifying the transmission frequency signal from the oscillation section 6 by the transmission section 5 is transmitted from the antenna section 3 to the target via the transmission / reception switching section 4. To send. The reflected wave from the target 2 is received by the antenna unit 3 and passed through the transmission / reception switching unit 4 to the speed system receiving unit 1
3 generates a video signal subjected to frequency conversion, amplification, and phase detection. The video signal is converted into a digital signal by the A / D converter 8 and the target 2
Is calculated, and the phase calculator 15 calculates the phase from the Doppler frequency. After measuring the Doppler frequency of the target 2, the mode control unit 12 switches the mode to the distance measurement mode. The distance receiving unit operates in the distance measurement mode. A transmission frequency setting signal for switching the transmission frequency for each transmission pulse is output from the timing generation section 9 to the oscillation section 6, and the transmission signal amplified by the transmission section 5 from the transmission frequency signal from the oscillation section 6 passes through the transmission / reception switching section 4. , Antenna part 3
To send to the goal. The reflected wave from the target 2 is received by the antenna unit 3, passed through the transmission / reception switching unit 4, and generated by the distance system receiving unit 7 by frequency conversion, amplification, and phase detection. The video signal is converted into a digital signal by the A / D converter 8, and a received signal corresponding to a different transmission frequency for each transmission pulse is subjected to inverse frequency analysis by the band synthesizer 10 to generate and display a range profile. . At this time, the phase based on the Doppler frequency of the target 2 measured in advance in the speed measurement mode is compared with the band synthesis unit 1.
Before the inverse frequency analysis at 0, the digital phase corrector 17 adds the received signal corresponding to each transmission frequency to the correction data of the received signal corresponding to the Doppler frequency held in the digital phase corrector 17 in advance. to correct. Therefore, the Doppler frequency of the moving target is set to A /
By correcting the received signal after the D conversion, the distance to the target and the range profile thereof can be displayed at an accurate distance.
【００１３】[0013]
【発明の効果】第１、２の発明によれば、レーダ装置で
目標のレンジプロフィールを取得するために目標が固
定、移動に関係なく、距離計測モードと速度計測モード
の切換により目標の移動速度に対応するドップラ周波数
を計測し、距離計測モードでドップラ周波数を補正する
ことにより移動目標の正確な距離とそのレンジプロフィ
ールを表示することができる。According to the first and second aspects of the present invention, the target moving speed can be obtained by switching between the distance measurement mode and the speed measurement mode regardless of whether the target is fixed or moving in order to obtain the target range profile with the radar device. By measuring the Doppler frequency corresponding to the distance and correcting the Doppler frequency in the distance measurement mode, the accurate distance of the moving target and its range profile can be displayed.
【００１４】また、第１の発明によれば、従来に比べ
て、移動目標の正確な距離とそのレンジプロフィールを
表示することが可能になる。Further, according to the first aspect, it is possible to display an accurate distance of a moving target and a range profile thereof as compared with the related art.
【００１５】また、第２の発明によれば、第１の発明に
比べて、ディジタル信号をソフトウェア処理により補正
が可能なため移動目標のレンジプロフィールをレーダ装
置内の温度の影響を受けず、より正確な距離とそのレン
ジプロフィールを表示することが可能になる。Further, according to the second invention, the digital signal can be corrected by software processing as compared with the first invention, so that the range profile of the moving target is not affected by the temperature in the radar device. It will be possible to display the exact distance and its range profile.
【図１】 この発明による誘導装置の実施の形態１を示
す図である。FIG. 1 is a diagram showing Embodiment 1 of a guidance device according to the present invention.
【図２】 この発明による誘導装置の実施の形態２を示
す図である。FIG. 2 is a diagram showing Embodiment 2 of the guidance device according to the present invention.
【図３】 従来のレーダ装置を示す図である。FIG. 3 is a diagram showing a conventional radar device.
【図４】 レーダ装置の運用図である。FIG. 4 is an operation diagram of the radar device.
１ レーダ装置、２ 目標、３ アンテナ部、４ 送受
信切換部、５ 送信部、６ 発振部、７ 距離系受信
部、８ Ａ／Ｄ変換部、９ タイミング発生部、１０
帯域合成部、１１ 表示部、１２ モード制御部、１３
速度系受信部、１４ ドップラ演算部、１５ 位相演
算部、１６ 位相補正部、１７ ディジタル位相補正
部。Reference Signs List 1 radar device, 2 target, 3 antenna unit, 4 transmission / reception switching unit, 5 transmission unit, 6 oscillation unit, 7 distance system reception unit, 8 A / D conversion unit, 9 timing generation unit, 10
Band synthesis unit, 11 display unit, 12 mode control unit, 13
Speed system receiver, 14 Doppler calculator, 15 phase calculator, 16 phase corrector, 17 digital phase corrector.
Claims (2)
換えるモード切換信号を出力するモード制御部と、前記
モード切換信号により送受信切換信号と送信周波数設定
信号を出力するタイミング発生部と、前記送受信切換信
号と前記送信周波数設定信号により送信周波数信号及び
ローカル信号を出力する発振部と、前記送信周波数信号
を増幅した送信信号を出力する送信部と、前記送受信切
換信号により送受信を切り換える送受信切換部と、この
送受信切換部から出力された送信信号を送信波として目
標に向けて放射し、目標からの反射波を受けるアンテナ
部と、前記モード制御部からのモード切換信号が速度計
測モードの時には、前記アンテナ部で受けた反射波の受
信信号を周波数変換、増幅、位相検波したビデオ信号を
出力する速度系受信部と、前記モード制御部からのモー
ド切換信号が距離計測モードの時には、前記アンテナ部
で受けた反射波の受信信号を位相補正部から出力された
ローカル補正信号により周波数変換、増幅、位相検波し
たビデオ信号をＡ／Ｄ変換部に出力する距離系受信部
と、前記速度系受信部と前記距離系受信部からビデオ信
号をディジタル信号に変換するＡ／Ｄ変換部と、前記デ
ィジタル信号を逆周波数解析し距離方向に分解された目
標のレンジプロフィールを演算する帯域合成部と、前記
レンジプロフィールを表示する表示部と、前記ディジタ
ル信号を周波数解析しドップラ周波数を演算するドップ
ラ演算部と、このドップラ演算部からのドップラ周波数
により位相を演算する位相演算部と、この位相演算部か
らの位相によりローカル信号を補正する位相補正部とを
備えたことを特徴とするレーダ装置。A mode control unit for outputting a mode switching signal for switching between a speed measurement mode and a distance measurement mode; a timing generation unit for outputting a transmission / reception switching signal and a transmission frequency setting signal in accordance with the mode switching signal; An oscillation unit that outputs a transmission frequency signal and a local signal according to the transmission frequency setting signal, a transmission unit that outputs a transmission signal obtained by amplifying the transmission frequency signal, and a transmission / reception switching unit that switches transmission and reception by the transmission / reception switching signal. An antenna section that radiates a transmission signal output from the transmission / reception switching section toward a target as a transmission wave and receives a reflected wave from the target; and an antenna section when a mode switching signal from the mode control section is in a speed measurement mode. Speed reception that outputs a video signal obtained by frequency-converting, amplifying, and phase-detecting the received signal of the reflected wave received by Unit, when the mode switching signal from the mode control unit is in the distance measurement mode, the received signal of the reflected wave received by the antenna unit is subjected to frequency conversion, amplification, and phase detection by the local correction signal output from the phase correction unit. A distance system receiving unit that outputs a video signal to an A / D converter, an A / D converter that converts a video signal from the speed system receiving unit and the distance system receiving unit into a digital signal, A band synthesis unit that calculates a target range profile that is analyzed and decomposed in a distance direction; a display unit that displays the range profile; a Doppler calculation unit that analyzes the frequency of the digital signal and calculates a Doppler frequency; Phase calculating section for calculating the phase based on the Doppler frequency from the section, and correcting the local signal based on the phase from the phase calculating section Radar apparatus is characterized in that a phase correction unit.
換えるモード切換信号を出力するモード制御部と、前記
モード切換信号により送受信切換信号と送信周波数設定
信号を出力するタイミング発生部と、前記送受信切換信
号と前記送信周波数設定信号により送信周波数信号とロ
ーカル信号を出力する発振部と、前記送信周波数信号を
増幅した送信信号を出力する送信部と、前記送受信切換
信号により送受信を切り換える送受信切換部と、この送
受信切換部から出力された送信信号を送信波として目標
に向けて放射し、目標からの反射波を受けるアンテナ部
と、前記モード制御部からのモード切換信号が速度計測
モードの時には、前記アンテナ部で受けた反射波の受信
信号を周波数変換、増幅、位相検波したビデオ信号を出
力する速度系受信部と、前記モード制御部からのモード
切換信号が距離計測モードの時には、前記アンテナ部で
受けた反射波の受信信号を前記発振部から出力されたロ
ーカル信号により周波数変換、増幅、位相検波したビデ
オ信号をＡ／Ｄ変換部に出力する距離系受信部と、前記
速度系受信部と前記距離系受信部からのビデオ信号をデ
ィジタル信号に変換するＡ／Ｄ変換部と、前記ディジタ
ル信号を逆周波数解析し距離方向に分解された目標のレ
ンジプロフィールを演算する帯域合成部と、前記レンジ
プロフィールを表示する表示部と、前記ディジタル信号
を周波数解析しドップラ周波数を演算するドップラ演算
部と、このドップラ演算部からのドップラ周波数により
位相を演算する位相演算部と、この位相演算部からの位
相によりＡ／Ｄ変換後のディジタル信号を補正するディ
ジタル位相補正部とを備えたことを特徴とするレーダ装
置。2. A mode control section for outputting a mode switching signal for switching between a speed measurement mode and a distance measurement mode; a timing generation section for outputting a transmission / reception switching signal and a transmission frequency setting signal in accordance with the mode switching signal; An oscillation unit that outputs a transmission frequency signal and a local signal according to the transmission frequency setting signal; a transmission unit that outputs a transmission signal obtained by amplifying the transmission frequency signal; and a transmission / reception switching unit that switches between transmission and reception by the transmission / reception switching signal. An antenna section that radiates a transmission signal output from the transmission / reception switching section toward a target as a transmission wave and receives a reflected wave from the target; and an antenna section when a mode switching signal from the mode control section is in a speed measurement mode. Velocity-system receiver that outputs a video signal obtained by frequency-converting, amplifying, and phase-detecting the received signal of the reflected wave received by And when the mode switching signal from the mode control unit is in the distance measurement mode, a video signal obtained by frequency-converting, amplifying, and phase-detecting a received signal of a reflected wave received by the antenna unit using a local signal output from the oscillation unit. To an A / D converter, an A / D converter for converting video signals from the speed-system receiver and the distance-system receiver into digital signals, and inverse frequency analysis of the digital signals. A band synthesis unit that calculates a target range profile decomposed in the distance direction; a display unit that displays the range profile; a Doppler calculation unit that analyzes the frequency of the digital signal to calculate a Doppler frequency; and a Doppler calculation unit. Phase calculation unit for calculating the phase based on the Doppler frequency from the digital signal and digital signal after A / D conversion based on the phase from the phase calculation unit Radar apparatus is characterized in that a digital phase corrector for correcting a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03299798A JP3709698B2 (en) | 1998-02-16 | 1998-02-16 | Radar equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03299798A JP3709698B2 (en) | 1998-02-16 | 1998-02-16 | Radar equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11231047A true JPH11231047A (en) | 1999-08-27 |
| JP3709698B2 JP3709698B2 (en) | 2005-10-26 |
Family
ID=12374503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03299798A Expired - Fee Related JP3709698B2 (en) | 1998-02-16 | 1998-02-16 | Radar equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3709698B2 (en) |
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| JP2005214755A (en) * | 2004-01-29 | 2005-08-11 | Mitsubishi Electric Corp | Radar device |
| JP2006177907A (en) * | 2004-12-24 | 2006-07-06 | Nec Corp | Interference-type radar |
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| JP2011179882A (en) * | 2010-02-26 | 2011-09-15 | Mitsubishi Electric Corp | Method of detecting target, passive radar system, and radar system |
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| JP2005214755A (en) * | 2004-01-29 | 2005-08-11 | Mitsubishi Electric Corp | Radar device |
| JP2006177907A (en) * | 2004-12-24 | 2006-07-06 | Nec Corp | Interference-type radar |
| JP4496954B2 (en) * | 2004-12-24 | 2010-07-07 | 日本電気株式会社 | Interferometric radar |
| JP2007240485A (en) * | 2006-03-13 | 2007-09-20 | Mitsubishi Electric Corp | Pulse radar system and distance measuring method |
| JP4702117B2 (en) * | 2006-03-13 | 2011-06-15 | 三菱電機株式会社 | Pulse radar apparatus and distance measuring method |
| JP2008215842A (en) * | 2007-02-28 | 2008-09-18 | Toyota Motor Corp | Target discrimination device |
| JP2012533748A (en) * | 2009-07-22 | 2012-12-27 | ファロ テクノロジーズ インコーポレーテッド | Method for optically scanning and measuring an object |
| US9113023B2 (en) | 2009-11-20 | 2015-08-18 | Faro Technologies, Inc. | Three-dimensional scanner with spectroscopic energy detector |
| US9210288B2 (en) | 2009-11-20 | 2015-12-08 | Faro Technologies, Inc. | Three-dimensional scanner with dichroic beam splitters to capture a variety of signals |
| US9529083B2 (en) | 2009-11-20 | 2016-12-27 | Faro Technologies, Inc. | Three-dimensional scanner with enhanced spectroscopic energy detector |
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| JP2011179882A (en) * | 2010-02-26 | 2011-09-15 | Mitsubishi Electric Corp | Method of detecting target, passive radar system, and radar system |
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