JPH04184285A - Processing signal - Google Patents

Processing signal

Info

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
Application number
JP31362590A
Other languages
Japanese (ja)
Inventor
Yoshitada Tominaga
富永 美忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Engineering Ltd
Original Assignee
NEC Engineering Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Engineering Ltd filed Critical NEC Engineering Ltd
Priority to JP31362590A priority Critical patent/JPH04184285A/en
Publication of JPH04184285A publication Critical patent/JPH04184285A/en
Pending legal-status Critical Current

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  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To reduce nonlinear distortion while reducing the number of signal processing circuits by making the signal processing to improve S/N in the output stage of a sensor, in the, sonar consisting of an array of plural sensors. CONSTITUTION:Sound signals 10 to Sn are converted into electric signals by sensors 1a to 1n, noises mixing in electric signals are reduced by signal processing circuits 2a to 2n, phase shifts of several sensor outputs are made by phasing circuits 3a to 3n, all sensor outputs are added by adding circuits 4a to 4n and beam outputs 101 to Bn are obtained. Signal processing may be made only for sensors 1a to 1n-x. The number of signal processing circuits can be made small where this corrective action alone is good enough because it is seldom that noises of sensors to compose an array are uniform, and noises of sensors, etc., near the vibrating bottom plate are loud.

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.

〔従来の技術〕[Conventional technology]

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.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

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.

〔課題を解決するための手段〕[Means to solve the problem]

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.

〔実施例〕〔Example〕

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.

〔発明の効果〕〔Effect of the invention〕

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.

【図面の簡単な説明】[Brief explanation of the drawing]

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)

【特許請求の範囲】[Claims] (1) 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.
(2) 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.
JP31362590A 1990-11-19 1990-11-19 Processing signal Pending JPH04184285A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242620A (en) * 2005-03-01 2006-09-14 Proassist:Kk Ultrasonic sensor signal processing system

Cited By (1)

* Cited by examiner, † Cited by third party
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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