JPS6144376A - Frequency analyser - Google Patents

Frequency analyser

Info

Publication number
JPS6144376A
JPS6144376A JP16530484A JP16530484A JPS6144376A JP S6144376 A JPS6144376 A JP S6144376A JP 16530484 A JP16530484 A JP 16530484A JP 16530484 A JP16530484 A JP 16530484A JP S6144376 A JPS6144376 A JP S6144376A
Authority
JP
Japan
Prior art keywords
spectrum
signal
azimuth
sound generating
generating body
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
JP16530484A
Other languages
Japanese (ja)
Inventor
Isao Kaneko
功 金子
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 Corp
Original Assignee
NEC Corp
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 Corp filed Critical NEC Corp
Priority to JP16530484A priority Critical patent/JPS6144376A/en
Publication of JPS6144376A publication Critical patent/JPS6144376A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/80Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
    • G01S3/801Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/86Combinations of radar systems with non-radar systems, e.g. sonar, direction finder

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To confirm the spectrum of a sound generating body indistinct in its presence, by detecting the azimuth of the sound generating body at a known position by a radar apparatus and removing the spectrum of the sound generating body detected from an arrival acoustic signal. CONSTITUTION:The acoustic signal 100 from a sounding body is received by a receiver 1 and resolved into spectrum signals 102, 103 by a frequency analysis part 2 and phase information is also contained in the spectrum signal 103 and an azimuth signal 104 is obtained from an azimuth detection circuit 3. The signals 102, 104 are inputted to a selection circuit 5 and the removal signal showing the azimuth alpha of a known sound generating body is further applied to the selection circuit 5 as a control signal from a radar apparatus 6. The spectrum of the known sound generating body is removed by the selection circuit 5 and the spectrum of an unknown sound generating body is displayed on a display part 4.

Description

【発明の詳細な説明】 (産業上の利用分封ン 本発明は、水中にある発音物体から到来する音響信号の
周波数を分析し、その音響信号のスペクトラムを表示す
る周波数分析装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application) The present invention relates to a frequency analysis device that analyzes the frequency of an acoustic signal coming from a sounding object in water and displays the spectrum of the acoustic signal.

(従来の技術) 従来のこのイ」(の周波数分析装置は、第3図にブロッ
ク図で示す構成をしており、水中にある発音物体から到
来する音響信号100を指向性を有した受波器1で受信
して受信信号101を生じ、周波数分析部2において受
信信号101の周波数分析をしてスペクトラム信号10
2 、103を生じ、方位検出回路3においてスペクト
ラム信号103の各スペクトラム要素毎に受波器の指向
性を利用して音響信号100の到来方位を検出し、表示
部4に周波数スペクトラムと各スペクトラム要素毎の方
位を表示する。第4図(a) 、 fb) 、 (e)
は発音物体が281@存在するときにおける第1図実施
例の表示例を示す図である。A1.A2.A、 は発音
物体Aのスペクトラムであり、B1.B2.B3  は
発音物体Bのスペクトラムである。又、&1,82.&
3 はスペクトラムA1.A2.A3  の方位を示す
点(方位点)であり、又、bl、b2.b3  はスペ
クトラムB、 、 B2. B3  の方位点である。
(Prior Art) A conventional frequency analyzer of this type has a configuration shown in the block diagram in FIG. A frequency analyzer 2 analyzes the frequency of the received signal 101 to generate a spectrum signal 10.
2, 103, the direction detection circuit 3 detects the arrival direction of the acoustic signal 100 using the directivity of the receiver for each spectrum element of the spectrum signal 103, and displays the frequency spectrum and each spectrum element on the display unit 4. Display the direction for each direction. Figure 4 (a), fb), (e)
1 is a diagram showing a display example of the embodiment of FIG. 1 when a sounding object 281@ exists. A1. A2. A, is the spectrum of the sounding object A, and B1. B2. B3 is the spectrum of the sounding object B. Also, &1,82. &
3 is spectrum A1. A2. It is a point (azimuth point) indicating the direction of A3, and also bl, b2. b3 is spectrum B, , B2. This is the bearing point of B3.

(発明が解決しようとする問題点) 従来の周波数分析装置における表示では、第4図に示す
如く、スペクトラムA、 、 A2. A3. B、。
(Problems to be Solved by the Invention) In the display of a conventional frequency analyzer, as shown in FIG. 4, the spectrum A, , A2 . A3. B.

B2. B、 が混在しているから、発音物体毎に第4
図(b)又は(c)のスペクトラムを分離し認識するた
めには、これらのスペクトラムを同図(、)の方位点&
1. B2 、 B5 、 bl、 b2 r b5 
 と対応させなければならない。そこで、未だ存在が明
確には判明していない発音物体を表示されたスペクトラ
ムから検出したい場合は、既に存在が判明している発音
物体が多数存在すると、従来の周波数分析装置ではその
スペクトラムも同時に表示されるので、その検出は容易
でない。
B2. Since B and are mixed, the fourth
In order to separate and recognize the spectra in figure (b) or (c), these spectra must be separated from the azimuth points &
1. B2, B5, bl, b2 r b5
must be matched with. Therefore, if you want to detect a sounding object whose existence is not yet clearly known from the displayed spectrum, if there are many sounding objects whose existence is already known, conventional frequency analyzers will display their spectra at the same time. Therefore, its detection is not easy.

従って、本発明の目的は、上記欠点を解決し、発音物体
のスペクトラムの中から未だ存在が明確には判明してい
ない発音物体のスペクト2ムを分心し認識することが容
易な周波数分析装置の提供にある。
Therefore, an object of the present invention is to provide a frequency analyzer which solves the above-mentioned drawbacks and is capable of easily segmenting and recognizing the spectrum 2m of a sounding object whose existence has not yet been clearly determined from the spectrum of the sounding object. It is provided by.

(問題点tps決するための手段) 本発明は、水中にある発音物体から到来する音alざ号
の周波数を分析しその音響信号のスペクトラムの表示を
する周波数分析装置において、一定範囲内の方位から到
来した前記音響信号のスペクトラムを選択的に除去する
手段が備えである構成である。
(Means for resolving the problem TPS) The present invention provides a frequency analyzer that analyzes the frequency of a sound signal coming from a sounding object underwater and displays the spectrum of the sound signal. The configuration includes means for selectively removing the spectrum of the arriving acoustic signal.

(作用) 本発明では、音響信号の各スペクトラムについて到来方
位を検出し、その到来方位が成る範囲にあるスペクトラ
ムを除去してスペクトラムの表示を行う。このようにし
て、表示されるスペクトラム金少数に限定し、存在が未
だ明確になっていない発音物体のスペクトラムの認識を
容易にしている。
(Operation) In the present invention, the direction of arrival of each spectrum of an acoustic signal is detected, and the spectrum within the range of the direction of arrival is removed to display the spectrum. In this way, the displayed spectrum is limited to a small number, making it easy to recognize the spectrum of a sounding object whose existence is not yet clear.

(実施例) 次に本発明の実施例について図面を参照して説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.

第1図は本発明の一実施例を示すブロック図である。本
実施例では、水中にある発音物体から到来する音響信号
100は受波器lで受信される。周波数分析部2は、受
信信号1010周波数分析を行いスペクトラム信号10
2及び103を出力する。スペクトラム信号102及び
103は受信信号101のスペクトラムを現す。スペク
トラム信号103には受信信号100の位相情報も含ま
れており、この信号103を受けた方位検出回路3は各
スペクトラム要素ごとに方位を検出し、方位信号104
を出力する。
FIG. 1 is a block diagram showing one embodiment of the present invention. In this embodiment, an acoustic signal 100 arriving from a sounding object located underwater is received by a receiver l. The frequency analysis section 2 performs frequency analysis on the received signal 1010 and generates a spectrum signal 1010.
2 and 103 are output. Spectrum signals 102 and 103 represent the spectrum of received signal 101. The spectrum signal 103 also includes phase information of the received signal 100, and the direction detection circuit 3 that receives this signal 103 detects the direction for each spectrum element, and generates the direction signal 104.
Output.

表示部4は第1図に示した従来の装置と同じである。本
実施例には、表示部4で表示する周波数スペクトラム及
び方位を選択する選択回路5が従来の装置に付加しであ
る。6は、水上船舶等の既知位置の発音物体の方位を本
実施例に与えるレーダー装置である。
The display section 4 is the same as the conventional device shown in FIG. In this embodiment, a selection circuit 5 for selecting the frequency spectrum and direction to be displayed on the display section 4 is added to the conventional device. Reference numeral 6 denotes a radar device that provides the present embodiment with the direction of a sounding object at a known position such as a watercraft.

選択回路5に既知の発音物体の方位αを現す除去方位信
号105がレーダー装置6から入力されると、選択口s
!+55は、方位信号104が現すスペクトラム要素毎
の方位βとαとを比較し、その差が一定値C未満の方位
のスペクトラム及びその方位の情報を除去し、差かC以
上の方位のスペクトラム及びその方位の情報をそれぞれ
スペクトラム信号106及び方位信号107として表示
部14に送る。表示部14は、スペクトラム信号106
が現すスペクトラム及び方位信号107が現す方位点を
表示する。
When the removal direction signal 105 representing the known direction α of the sounding object is inputted from the radar device 6 to the selection circuit 5, the selection port s
! +55 compares the azimuths β and α for each spectrum element expressed by the azimuth signal 104, removes the spectrum of azimuths where the difference is less than a certain value C and the information on that azimuth, and calculates the spectrum and the azimuths of the azimuths where the difference is C or more. The azimuth information is sent to the display section 14 as a spectrum signal 106 and an azimuth signal 107, respectively. The display unit 14 displays the spectrum signal 106
The spectrum represented by the azimuth signal 107 and the azimuth point represented by the azimuth signal 107 are displayed.

Cは、周波数分析装置の方位検出誤差Δβ及びαの誤差
△αから決定されるものであり、本実施例では1例とし
てはC=Δβ+Δαにしである。
C is determined from the direction detection error Δβ of the frequency analyzer and the error Δα of α, and in this embodiment, as an example, C=Δβ+Δα.

尚、選択回路5においてスペクトラムが除去されると、
そのままでは表示部4における表示が0レベルになり、
表示されるスペクトラム要素間のレベルの差が大キつて
、スペクトラム全体が児すら(なるから、本実施例では
、その対策の1例として除去されたスペクトラムが表示
されるべき場所に背景雑音と同等のレベルの疑似スペク
トラムを表示することにより、スペクトラム全体を見や
すくしである。
Note that when the spectrum is removed in the selection circuit 5,
If left as is, the display on the display section 4 will be at 0 level,
The difference in level between the displayed spectrum elements becomes so large that the entire spectrum becomes invisible (so in this embodiment, as an example of a countermeasure, the removed spectrum is placed in the place where it should be displayed, equivalent to background noise). By displaying a pseudo spectrum at the level of , it is easier to see the entire spectrum.

第3図の従来装置により処理されたとき第4図の如く表
示される音響信号100が第1図実施例に入力された場
合を考える。第4図において既知の目標のスペクトラム
要素をB、 、 B2. B、  とし、その方位をb
としたとき、 1b1−bl 、 1b2−bl 、 1b5−bl<
cla、−bl 、 1a2−bl 、 +a5−b+
≧Cであれば、本実施例の表示部4には第2図(a) 
、 tb) 。
Consider the case where an audio signal 100, which when processed by the conventional apparatus of FIG. 3 is displayed as shown in FIG. 4, is input to the embodiment of FIG. In FIG. 4, the spectral elements of the known target are denoted as B, , B2. B, and its direction is b
When 1b1-bl, 1b2-bl, 1b5-bl<
cla, -bl, 1a2-bl, +a5-b+
If ≧C, the display unit 4 of this embodiment will display the image shown in FIG. 2(a).
, tb).

(c)に示す如くに表示され、スペクトラムB1.B2
゜B3及び方位点す、 、 b2. b3は表示から除
去される。
The spectrum is displayed as shown in (c), and the spectrum B1. B2
゜B3 and the bearing point, , b2. b3 is removed from the display.

このように、本実施例では、レーダー装置6が検知した
発音物体(水上船舶等)の方位αを中心とする一定方位
範+711(±C)の発音物体のスペクトラム及び方位
点が表示部4に表示されないから、存在か未知な発音物
体のスペクトラムA、 、 A2. A5及び方位点&
1 、712 、 A5  が容易に認識できる。
As described above, in this embodiment, the spectrum and azimuth points of the sounding object (water vessel, etc.) detected by the radar device 6 are displayed on the display unit 4 in a fixed azimuth range +711 (±C) centered on the azimuth α of the sounding object (water vessel, etc.). Spectrum of a sounding object whose existence is unknown because it is not displayed A, , A2. A5 and bearing point &
1, 712, and A5 are easily recognized.

なお、本実14例では既知発音物体の方位αを現す除去
方位(1号105はレーダー装置6から供給されるが、
本信号105は聴音装置、方位設定装置等から入力して
も差支えない。方位設定装置は、操作者が方位ダイヤル
やスイッチで設定した方位を選択回路5に入力する装置
である。また、本実施例では、選択回路5で除去したス
ペクトラムの周波数位置に背景龜曾と同等レベルの疑似
スペクトラムを表示したが、本発明では必らずしもその
盛会はなく、その周仮数位置は0レベルのままで表示し
ても差支えない。
In this 14th example, the removal direction (No. 1 105 is supplied from the radar device 6,
This signal 105 may be input from a listening device, a direction setting device, etc. The azimuth setting device is a device for inputting the azimuth set by the operator using a azimuth dial or switch into the selection circuit 5. In addition, in this embodiment, a pseudo spectrum of the same level as the background spectrum is displayed at the frequency position of the spectrum removed by the selection circuit 5, but in the present invention, this is not necessarily the case, and the period mantissa position is There is no problem even if it is displayed at the 0 level.

(発明の効果) 以上説明したように、本発明によれば、発音物体のスペ
クトラムの中から未だ存在が明確には判明していない発
音物体のスペクトラムを分離し認識することが容易な周
波数分析1tttが提供できる。
(Effects of the Invention) As explained above, according to the present invention, frequency analysis 1ttt makes it easy to separate and recognize the spectrum of a sounding object whose existence is not clearly known from among the spectrum of sounding objects. can be provided.

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

示す図である。 1・・・指間性を有した受波器、2・・・周波数分析部
、3・・・方位検出回路、4・・・表示部、5・・・選
択回路、6・・・レーダー装置。 ゛、−一ン′ 拓1図 第2図 M濱軟 肩及収 第3図 第4I211 用′J、?ス 用謹執 用人数
FIG. DESCRIPTION OF SYMBOLS 1... Receiver with interdigital property, 2... Frequency analysis section, 3... Direction detection circuit, 4... Display section, 5... Selection circuit, 6... Radar device .゛, -1in' Taku 1 Figure 2 M Hama Soft Shoulder and Collection Figure 3 Figure 4 I211 Use'J,? Number of employees

Claims (1)

【特許請求の範囲】[Claims]  水中にある発音物体から到来する音響信号の周波数を
分析し前記音響信号のスペクトラムの表示をする周波数
分析装置において、限られた範囲内の方位から到来した
前記音響信号の前記スペクトラムを選択的に除去して前
記表示をする手段が備えてあることを特徴とする周波数
分析装置。
In a frequency analysis device that analyzes the frequency of an acoustic signal arriving from a sounding object in water and displays the spectrum of the acoustic signal, selectively removing the spectrum of the acoustic signal arriving from a direction within a limited range. A frequency analysis device characterized by comprising means for displaying the above-mentioned information.
JP16530484A 1984-08-07 1984-08-07 Frequency analyser Pending JPS6144376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16530484A JPS6144376A (en) 1984-08-07 1984-08-07 Frequency analyser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16530484A JPS6144376A (en) 1984-08-07 1984-08-07 Frequency analyser

Publications (1)

Publication Number Publication Date
JPS6144376A true JPS6144376A (en) 1986-03-04

Family

ID=15809785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16530484A Pending JPS6144376A (en) 1984-08-07 1984-08-07 Frequency analyser

Country Status (1)

Country Link
JP (1) JPS6144376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8113321B2 (en) 2006-05-06 2012-02-14 Lord Corporation Helicopter reduced vibration isolator axial support strut
CN102678806A (en) * 2002-09-24 2012-09-19 贝尔直升机泰克斯特龙公司 Method for controlling sound radiation of ship

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102678806A (en) * 2002-09-24 2012-09-19 贝尔直升机泰克斯特龙公司 Method for controlling sound radiation of ship
US8113321B2 (en) 2006-05-06 2012-02-14 Lord Corporation Helicopter reduced vibration isolator axial support strut

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