JPH02278177A - Passive sonar signal simulation apparatus - Google Patents
Passive sonar signal simulation apparatusInfo
- Publication number
- JPH02278177A JPH02278177A JP10049789A JP10049789A JPH02278177A JP H02278177 A JPH02278177 A JP H02278177A JP 10049789 A JP10049789 A JP 10049789A JP 10049789 A JP10049789 A JP 10049789A JP H02278177 A JPH02278177 A JP H02278177A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- spectrum distribution
- white noise
- passive sonar
- warship
- 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
- 238000004088 simulation Methods 0.000 title abstract description 3
- 230000003595 spectral effect Effects 0.000 claims description 24
- 238000001228 spectrum Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はパッシブソーナー信号模擬装置に関し、特にパ
ッシブソーナー装置の操作員の練度を向上させるため訓
練において必要な、艦船が発生する非スパイク性のブロ
ードバンドの音響信号を模擬的に発生するパッシブソー
ナー信号模擬装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a passive sonar signal simulating device, and in particular to a passive sonar signal simulating device, which is necessary for training to improve the skill of operators of passive sonar devices. The present invention relates to a passive sonar signal simulator that simulates a broadband acoustic signal.
従来、この種のパッシブソーナー信号模η装置において
は、艦船が発生する帯域を持ったブロードバンドを模擬
して発生するブロードバンド信り模擬回路は、単純な白
色雑音発生回路となっていた。Conventionally, in this type of passive sonar signal simulating device, the broadband signal simulating circuit that simulates the broadband signal generated by a ship has been a simple white noise generating circuit.
実際の艦船のブロードバンド信号は、艦船の運用状況に
よりレベル及び周波数スペクトル分布が変化するが、上
述した従来方式のブロードハンド信号模擬回路では、周
波数スペクトル分布を変化させることが出来ないため、
実態に即した訓練ができないという欠点がある。The level and frequency spectrum distribution of an actual ship's broadband signal change depending on the operational status of the ship, but the conventional broadband signal simulation circuit described above cannot change the frequency spectrum distribution.
The drawback is that training cannot be conducted in accordance with the actual situation.
本発明の目的は上述した欠点を除去し、周波数スペクト
ル分布を実際の艦船のブロードバンド信号に模擬的に対
応させたブロードバンド信号を発生し、著しく実態に即
した訓練ができるパッシブソーナー信号擬似装置を提供
することにある。An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a passive sonar signal simulating device that generates a broadband signal whose frequency spectrum distribution corresponds to that of an actual ship's broadband signal, and allows training to be carried out in a way that closely matches the actual situation. It's about doing.
本発明のパッシブソーナー信号擬似装置は、艦船が発生
する音響信号に関する任意のスペクトル分布を表現する
周波数領域のスペクトル分布信号を発生するスペクトル
分布発生回路と、白色雑音を発生する白色雑音発生回路
と、前記スペクトル分布信号を受けてその周波数特性に
対応した周波数特性を可変的に付与され前記白色雑音を
入力して艦船が発生する音響を模擬したパッシブソーナ
ー擬似信号を発生する特性可変フィルタと、を備えて構
成される。The passive sonar signal simulating device of the present invention includes: a spectral distribution generation circuit that generates a frequency domain spectral distribution signal representing an arbitrary spectral distribution of an acoustic signal generated by a ship; a white noise generation circuit that generates white noise; a characteristic variable filter that receives the spectrum distribution signal and is variably given a frequency characteristic corresponding to the frequency characteristic thereof, inputs the white noise, and generates a passive sonar pseudo signal that simulates the sound generated by a ship. It consists of
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明のパッシブソーナー信号擬似装置の一実
施例の構成図である。第１図の実施例は、艦船が発生す
る音響信号に関する任意のスペクトル分布を表現する周
波数領域のスペクトル分布信号を発生するスペクトル分
布発生回路１と、白色雑音を発生する白色雑音発生口Ｈ
２と、スペクトル分布発生回路の発生するスペクトル分
布信号を受けてその周波数特性に対応した周波数特性を
可変的に付与され白色雑音発生回路２の出力する白色雑
音を受けて艦船が発生する音響を模擬したパッシブソー
ナー擬似信号を発生する特性可変フィルタ３とを備えて
成る。FIG. 1 is a block diagram of an embodiment of a passive sonar signal simulating device according to the present invention. The embodiment shown in FIG. 1 includes a spectral distribution generation circuit 1 that generates a spectral distribution signal in the frequency domain that expresses an arbitrary spectral distribution regarding an acoustic signal generated by a ship, and a white noise generation port H that generates white noise.
2, which simulates the sound generated by a ship in response to the white noise output from the white noise generation circuit 2, which is variably given a frequency characteristic corresponding to the frequency characteristic of the spectral distribution signal generated by the spectral distribution generation circuit 2. and a characteristic variable filter 3 that generates a passive sonar pseudo signal.
次に、第１図の実施例の動作について説明する。Next, the operation of the embodiment shown in FIG. 1 will be explained.
スペクトル分布発生回路１は、擬似ぜんとする艦船の所
望のブロードバンド信号を設定し、このブロードバンド
信号をフーリエ変換によって周波数領域のスペクトル分
布信号１０１．とじて特性可変フィルタ３に供給する。The spectral distribution generation circuit 1 sets a desired broadband signal of a ship to be simulated, and transforms this broadband signal into a frequency domain spectral distribution signal 101. It is then supplied to the variable characteristic filter 3.
特性可変フィルタ３は、入力したスペクトル分布信号１
０１に逆フーリエ変換を施しインパルス応答信号３０１
を得る逆フーリエ変換回路３１と、インパルス応答信号
３０１に窓関数を乗算してフィルタ係数３０２として出
力するウィンドウ関数乗算回路３２と、フィルタ係数３
２を利用して形成され、白色雑音２１によって駆動され
る有限インパルス応答型フィルタ３３を備えて成る。The characteristic variable filter 3 receives the input spectrum distribution signal 1.
01 is subjected to inverse Fourier transform to produce an impulse response signal 301.
an inverse Fourier transform circuit 31 that obtains the filter coefficient 3; a window function multiplication circuit 32 that multiplies the impulse response signal 301 by a window function and outputs the result as a filter coefficient 302;
2 and includes a finite impulse response filter 33 driven by white noise 21.
スペクトル分布信号１０１は、ブロードバンド信号の周
波数スペクトル分布を表す周波領域のデータである。逆
フーリエ変換回路は、スペクトル分布信号１０１を逆フ
ーリエ変換し、時間領域のインパルスレスポンス信号３
０１を出力する。インパルスレスポンス信号３０１は、
フーリエ逆変換の原理により、スペクトル分布信号１０
１に等価な周波数持つフィルタのインパルスレスポンス
に等しい。The spectral distribution signal 101 is frequency domain data representing the frequency spectral distribution of a broadband signal. The inverse Fourier transform circuit performs inverse Fourier transform on the spectral distribution signal 101 and generates a time domain impulse response signal 3.
Outputs 01. The impulse response signal 301 is
According to the principle of inverse Fourier transform, the spectral distribution signal 10
It is equal to the impulse response of a filter with a frequency equivalent to 1.
ウィンドウ関数集積回路３２は、インパルスレスポンス
信号３０１にハニングウィンドウ関数等のウィンドウ関
数を乗算してリップルを抑圧した切り出しを行ない、フ
ィルタ係数３０２を出力する。The window function integrated circuit 32 multiplies the impulse response signal 301 by a window function such as a Hanning window function, performs cutting with ripples suppressed, and outputs a filter coefficient 302.
上述したウィンドウ関数の乗算は、特性可変フィルタ３
の周波数特性のリップルを抑圧するために必要な処理で
あり、リップル特性を重視しない場合には省略してもよ
い。The window function multiplication described above is performed using the variable characteristic filter 3.
This process is necessary to suppress ripples in the frequency characteristics of , and may be omitted if ripple characteristics are not important.
有限インパルス応答型フィルタ３３は、サンプルポイン
トに対応したフィルタ係数としてのウィンドウ関数乗算
回路３２の出力を受けてこれをフィルタ係数として形成
される有限インパルス応答型フィルタ（ＦＩＲフィルタ
）であり、スペクトル分布信号１０１に等しい周波数応
答特性を持つ。白色雑音信号２０１は、この有限インパ
ルス応答型フィルタ３３に供給され、その結果、艦船の
発生ずるブロードバンド信号の周波数スペクトル分布に
対応したスペクトル分布を有するパッシブソーナー擬似
信号３０１を発生する。The finite impulse response filter 33 is a finite impulse response filter (FIR filter) that receives the output of the window function multiplication circuit 32 as a filter coefficient corresponding to a sample point and is formed using this as a filter coefficient. It has a frequency response characteristic equal to 101. The white noise signal 201 is fed to this finite impulse response filter 33, which generates a passive sonar pseudo signal 301 having a spectral distribution corresponding to the frequency spectral distribution of the broadband signal generated by the ship.
この場合、スペクトル分布信号１．０１に付与するスペ
クトル分布は任意に設定でき、かくして任意のスペクト
ル分布を有するパッシブソーナー擬似信号が得られる。In this case, the spectral distribution given to the spectral distribution signal 1.01 can be arbitrarily set, and thus a passive sonar pseudo signal having an arbitrary spectral distribution can be obtained.
以上説明したように本発明は、艦船の発生する音響信号
を擬似すべきパッシブソーナー擬似信号の周波数スペク
トル分布を艦船の運用状況に応じた内容に変更すること
によって、実態に即したパッシブソーナー信号を模擬す
ることが可能となり、著しく訓練効果を向上させること
ができる効果がある。As explained above, the present invention changes the frequency spectrum distribution of the passive sonar pseudo signal that simulates the acoustic signal generated by a ship to a content that corresponds to the operational status of the ship, thereby generating a passive sonar signal that matches the actual situation. It becomes possible to simulate the training, which has the effect of significantly improving the training effect.
第１図は本発明のパッシブソーナー信号模擬装置の一実
施例の構成図である。
１・・・スペクトル分布発生回路、２・・・白色雑音発
生回路、３・・・特性可変フィルタ、３１・・・逆フー
リエ変換回路、３２・・・ウィンドウ関数乗算回路、３
３・・・有限インパルス応答型フィルタ。FIG. 1 is a configuration diagram of an embodiment of a passive sonar signal simulating device of the present invention. DESCRIPTION OF SYMBOLS 1... Spectrum distribution generation circuit, 2... White noise generation circuit, 3... Characteristic variable filter, 31... Inverse Fourier transform circuit, 32... Window function multiplication circuit, 3
3...Finite impulse response filter.
Claims (1)
を表現する周波数領域のスペクトル分布信号を発生する
スペクトル分布発生回路と、白色雑音を発生する白色雑
音発生回路と、前記スペクトル分布信号を受けてその周
波数特性に対応した周波数特性を可変的に付与され前記
白色雑音を入力して艦船が発生する音響を模擬したパッ
シブソーナー擬似信号を発生する特性可変フィルタと、
を備えて成ることを特徴とするパッシブソーナー信号擬
似装置。a spectral distribution generation circuit that generates a spectral distribution signal in a frequency domain that represents an arbitrary spectral distribution of an acoustic signal generated by a ship; a white noise generation circuit that generates white noise; and a frequency characteristic of the spectral distribution signal that receives the spectral distribution signal. a characteristic variable filter that inputs the white noise and generates a passive sonar pseudo signal that simulates the sound generated by a ship;
A passive sonar signal simulating device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10049789A JP2867417B2 (en) | 1989-04-19 | 1989-04-19 | Passive sonar signal simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10049789A JP2867417B2 (en) | 1989-04-19 | 1989-04-19 | Passive sonar signal simulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02278177A true JPH02278177A (en) | 1990-11-14 |
| JP2867417B2 JP2867417B2 (en) | 1999-03-08 |
Family
ID=14275568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10049789A Expired - Lifetime JP2867417B2 (en) | 1989-04-19 | 1989-04-19 | Passive sonar signal simulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2867417B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100505327B1 (en) * | 2001-07-10 | 2005-08-30 | 에스티엑스엔진 주식회사 | Virtual Sound Source Generating Method for simulating a fish detector |
| CN113992299A (en) * | 2021-09-10 | 2022-01-28 | 中国船舶重工集团公司第七一九研究所 | Ship noise frequency spectrum modulation method and device |
-
1989
- 1989-04-19 JP JP10049789A patent/JP2867417B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100505327B1 (en) * | 2001-07-10 | 2005-08-30 | 에스티엑스엔진 주식회사 | Virtual Sound Source Generating Method for simulating a fish detector |
| CN113992299A (en) * | 2021-09-10 | 2022-01-28 | 中国船舶重工集团公司第七一九研究所 | Ship noise frequency spectrum modulation method and device |
| CN113992299B (en) * | 2021-09-10 | 2023-08-25 | 中国船舶重工集团公司第七一九研究所 | Ship noise spectrum modulation method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2867417B2 (en) | 1999-03-08 |
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