NO970678L - Linear acoustic antenna with apparatus for unambiguous directional determination - Google Patents

Linear acoustic antenna with apparatus for unambiguous directional determination

Info

Publication number
NO970678L
NO970678L NO970678A NO970678A NO970678L NO 970678 L NO970678 L NO 970678L NO 970678 A NO970678 A NO 970678A NO 970678 A NO970678 A NO 970678A NO 970678 L NO970678 L NO 970678L
Authority
NO
Norway
Prior art keywords
antenna
hydrophones
linear acoustic
acoustic antenna
directional determination
Prior art date
Application number
NO970678A
Other languages
Norwegian (no)
Other versions
NO970678D0 (en
Inventor
Jean Marc Cortambert
Original Assignee
France Etat
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 France Etat filed Critical France Etat
Publication of NO970678D0 publication Critical patent/NO970678D0/en
Publication of NO970678L publication Critical patent/NO970678L/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/20—Arrangements of receiving elements, e.g. geophone pattern

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Multimedia (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Lineær akustisk antenne (10) med en rekke hydrofoner (H^ - H¿) og beregnet for nedføring av en undervannsbåt eller et overflatefartøy. Antennen (10) omfatter en hoveddel med N hydrofoner (Hj - H¿) med omnidirek- sjonell karakteristikk, og en tilleggsdel A med to hydrofoner AG, AD med retnings- karakteristikk som en kardioide. Tilleggs- delen A brukes for å utelukke tvetydighet ved retningsbestemmelse (høyre/venstre). I en beregningskrets (34) beregnes kohe- rens mellom de signaler som kommer inn til hoveddelen, og to signaler D(t) og G(t) for hhv en høyre og en venstre kanal, mottatt av tilleggsdelen A, og ved en sanunenlikning mellom koherensverdiene finner man den største og kan derved slutte seg til hvilken side en kilde (22) ligger på i forhold til antennens midtakse (12). Anvendelse særlig for slepeantenner.Linear acoustic antenna (10) with a series of hydrophones (H ^ - H¿) and intended for the downstream of a submarine or surface craft. The antenna (10) comprises a main part with N hydrophones (Hj - H¿) with omnidirectional characteristics, and an additional part A with two hydrophones AG, AD with directional characteristics as a cardioid. Appendix A is used to exclude ambiguity in directional determination (right / left). In a calculation circuit (34), the coherence between the signals coming in to the body is calculated and two signals D (t) and G (t) for a right and a left channel, respectively, received by the additional part A, and by a zone equation between the coherence values are found to be the largest and can thereby conclude on which side a source (22) lies relative to the center axis of the antenna (12). Use especially for tow antennas.

NO970678A 1996-02-15 1997-02-14 Linear acoustic antenna with apparatus for unambiguous directional determination NO970678L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9601844A FR2745145B1 (en) 1996-02-15 1996-02-15 ACOUSTIC LINEAR ANTENNA WITH AMBIGUITY LIFTING DEVICE

Publications (2)

Publication Number Publication Date
NO970678D0 NO970678D0 (en) 1997-02-14
NO970678L true NO970678L (en) 1997-08-18

Family

ID=9489209

Family Applications (1)

Application Number Title Priority Date Filing Date
NO970678A NO970678L (en) 1996-02-15 1997-02-14 Linear acoustic antenna with apparatus for unambiguous directional determination

Country Status (7)

Country Link
EP (1) EP0790506B1 (en)
AU (1) AU1472897A (en)
CA (1) CA2197703A1 (en)
DE (1) DE69705136T2 (en)
ES (1) ES2158456T3 (en)
FR (1) FR2745145B1 (en)
NO (1) NO970678L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10237761A1 (en) * 2002-08-17 2004-03-04 Stn Atlas Elektronik Gmbh Method for estimating the antenna geometry of an acoustic linear antenna
FR2862439B1 (en) * 2003-11-17 2006-02-10 Jean Marc Cortambert LINEAR SUB-ANTENNA CRUCIFORM ANTENNA AND ASSOCIATED TREATMENT
FR2909457B1 (en) * 2006-12-01 2009-01-23 Thales Sa METHOD FOR REMOVING POTENTIAL SOURCES FOR PASSIVE SONAR COMPRISING MULTIPLE LINEAR ANTENNAS
US20140152503A1 (en) * 2012-12-03 2014-06-05 Qualcomm Incorporated Direction of arrival estimation using linear array

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4129874A (en) * 1977-09-19 1978-12-12 The United States Of America As Represented By The Field Operations Bureau Of The Federal Communications Commission Antenna pattern combiner
US4187490A (en) * 1978-08-03 1980-02-05 Sanders Associates, Inc. Range determining system
DE3537759A1 (en) * 1985-10-24 1987-04-30 Krupp Gmbh Method for eliminating the directional ambiguity of linear antennas
FR2685848B1 (en) * 1991-12-26 1994-02-25 Thomson Csf LINEAR ACOUSTIC ANTENNA.

Also Published As

Publication number Publication date
EP0790506A1 (en) 1997-08-20
EP0790506B1 (en) 2001-06-13
CA2197703A1 (en) 1997-08-16
FR2745145A1 (en) 1997-08-22
DE69705136T2 (en) 2002-03-07
DE69705136D1 (en) 2001-07-19
FR2745145B1 (en) 1998-06-12
ES2158456T3 (en) 2001-09-01
AU1472897A (en) 1997-08-21
NO970678D0 (en) 1997-02-14

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