JPH04184285A - Processing signal - Google Patents
Processing signalInfo
- Publication number
- JPH04184285A JPH04184285A JP31362590A JP31362590A JPH04184285A JP H04184285 A JPH04184285 A JP H04184285A JP 31362590 A JP31362590 A JP 31362590A JP 31362590 A JP31362590 A JP 31362590A JP H04184285 A JPH04184285 A JP H04184285A
- Authority
- JP
- Japan
- Prior art keywords
- signal processing
- sensors
- circuits
- noises
- sensor
- 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
- 238000003672 processing method Methods 0.000 claims description 8
- 230000010363 phase shift Effects 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005311 autocorrelation function Methods 0.000 description 1
- 239000000470 constituent Substances 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〕
本発明は信号処理方式、特に、センサアレイを有するソ
ーナーの信号処理方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a signal processing system, and in particular to a signal processing system for a sonar having a sensor array.
従来の信号処理方式は、複数個のセンサ出力より作成し
た出力(以下ビーム出力という)について、雑音を抑制
し、あるいは信号を強調する信号処理を行なっていた。Conventional signal processing methods perform signal processing to suppress noise or enhance signals on outputs (hereinafter referred to as beam outputs) created from a plurality of sensor outputs.
ビーム出力は、多数の待ち受はビームを構成するソーナ
ーにおいては、センサの数を越えることがある。Beam power can exceed the number of sensors in sonar systems where multiple antennas make up the beam.
上述した従来の信号処理方式は、センサ数に比してビー
ム出力数が多い場合、信号処理回路数が多くなり、また
特定の限られたセンサに特にノイズが重畳し、そのセン
サのノイズを抑制すれば足りるときにもビーム出力全数
に対して信号処理を行なうので、コストが増加するとい
う欠点があった。In the conventional signal processing method described above, when the number of beam outputs is large compared to the number of sensors, the number of signal processing circuits increases, and noise is particularly superimposed on a specific limited sensor, making it difficult to suppress the noise of that sensor. Since signal processing is performed on all beam outputs even when it would be sufficient to do so, there is a drawback that the cost increases.
更に、特定の限られたセンサに特にノイズが重畳してい
ると、センサ出力によりビーム出力を作成する過程で、
その構成回路の非直線性のため所期の効果を得ることが
できないという欠点があった。Furthermore, if noise is superimposed on a specific limited number of sensors, in the process of creating a beam output from the sensor output,
There was a drawback that the desired effect could not be obtained due to the non-linearity of its constituent circuits.
第1の発明の信号処理方式は、複数個のセンサのアレイ
よりなるソーナーにおいて、前記センサの出力段階でS
/N比を向上させる信号処理を行なう手段を含んで構成
される。The signal processing method of the first invention is such that, in a sonar comprising an array of a plurality of sensors, S
The device includes means for performing signal processing to improve the /N ratio.
第2の発明の信号処理方式は、全数のセンサに満たない
一部の前記センサについてのみ前記センサの出力段階で
S/N比を向上させる信号処理を行なう手段を含んで構
成される。The signal processing method of the second invention includes means for performing signal processing for improving the S/N ratio at the output stage of the sensors only for some of the sensors that are less than the total number of sensors.
次に、本発明について図面を参照して詳細に説明する。 Next, the present invention will be explained in detail with reference to the drawings.
第1図は本発明の第1の実施例を示すブロック図である
。FIG. 1 is a block diagram showing a first embodiment of the present invention.
第1図に示す信号処理方式は、音響信号10〜Snをセ
ンサ1a〜1nで電気信号に変換し、信号処理回路2a
〜2nで電気信号中に混在するノイズを低減させ、整相
回路3a〜3nで各センサ出力の移相を行ない、加算回
路4a〜4nで全センサ出力を加算し、ビーム出力10
1〜Bnを得る。The signal processing method shown in FIG. 1 converts acoustic signals 10 to Sn into electrical signals by sensors 1a to 1n, and
~2n reduces the noise mixed in the electric signal, phasing circuits 3a to 3n shift the phase of each sensor output, adder circuits 4a to 4n add all the sensor outputs, and the beam output is 10.
1 to obtain Bn.
第2図は本発明の第2の実施例を示すブロック図である
。FIG. 2 is a block diagram showing a second embodiment of the invention.
ここでは、センサ1a〜1n−xについてのみ信号処理
を行なっている。Here, signal processing is performed only for the sensors 1a to 1n-x.
一般に、アレイを構成するセンサのノイズが均一である
ことは少なく、振動する船底板に近いセンサ等のノイズ
が高いので、この対策だけでよい場合には信号処理回路
の数を節減できる。Generally, the noise of the sensors that make up the array is rarely uniform, and the noise of sensors near the vibrating bottom plate is high, so if this measure is all that is needed, the number of signal processing circuits can be reduced.
信号処理回路には、自己相関関数を求める等の技術が使
用される。Techniques such as determining an autocorrelation function are used in the signal processing circuit.
本発明の信号処理方式は、信号処理回路の数を低減でき
、また非直線歪を低下できるという効果がある。The signal processing method of the present invention has the effect of reducing the number of signal processing circuits and reducing nonlinear distortion.
第1図は本発明の第1の実施例を示すブロック図、第2
図は本発明の第2の実施例を示すブロック図である。
1・・・・・・センサ、2・・・・・・信号処理回路、
3・・−・・・整相回路、4・・・・・・加算回路。
代理人 弁理士 内 原 晋FIG. 1 is a block diagram showing a first embodiment of the present invention;
The figure is a block diagram showing a second embodiment of the present invention. 1...Sensor, 2...Signal processing circuit,
3...--phasing circuit, 4...addition circuit. Agent Patent Attorney Susumu Uchihara
Claims (2)
記センサの出力段階でS/N比を向上させる信号処理を
行なう手段を備えることを特徴とする信号処理方式。(1) A signal processing method, in a sonar comprising an array of a plurality of sensors, comprising means for performing signal processing to improve the S/N ratio at the output stage of the sensor.
前記センサの出力段階でS/N比を向上させる信号処理
を行なう手段を備える請求項(1)記載の信号処理方式
。(2) The signal processing method according to claim (1), further comprising means for performing signal processing to improve the S/N ratio at the output stage of the sensors only for some of the sensors that are less than the total number of sensors.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31362590A JPH04184285A (en) | 1990-11-19 | 1990-11-19 | Processing signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31362590A JPH04184285A (en) | 1990-11-19 | 1990-11-19 | Processing signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04184285A true JPH04184285A (en) | 1992-07-01 |
Family
ID=18043576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31362590A Pending JPH04184285A (en) | 1990-11-19 | 1990-11-19 | Processing signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04184285A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006242620A (en) * | 2005-03-01 | 2006-09-14 | Proassist:Kk | Ultrasonic sensor signal processing system |
-
1990
- 1990-11-19 JP JP31362590A patent/JPH04184285A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006242620A (en) * | 2005-03-01 | 2006-09-14 | Proassist:Kk | Ultrasonic sensor signal processing system |
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