GB1486068A - Echo sounder systems utilizing non-linear acoustic signal interaction - Google Patents

Echo sounder systems utilizing non-linear acoustic signal interaction

Info

Publication number
GB1486068A
GB1486068A GB1271975A GB1271975A GB1486068A GB 1486068 A GB1486068 A GB 1486068A GB 1271975 A GB1271975 A GB 1271975A GB 1271975 A GB1271975 A GB 1271975A GB 1486068 A GB1486068 A GB 1486068A
Authority
GB
United Kingdom
Prior art keywords
acoustic signal
array
towed
signal interaction
utilizing non
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.)
Expired
Application number
GB1271975A
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.)
Simrad AS
Original Assignee
Simrad AS
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 Simrad AS filed Critical Simrad AS
Publication of GB1486068A publication Critical patent/GB1486068A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves

Abstract

1486068 Echo-sounding systems SIMRAD AS 26 March 1975 [28 March 1974] 12719/75 Heading G1G An echo-sounder utilizing non-linear acoustic signal interaction includes a transmitter transducer 4 mounted in a towed body 2, and a receiving transducer array 6 towed in the vicinity of the body 2. A transmit/receive unit 7 in the towing vessel 1, or in the body 2, energizes transducer 4 at two frequencies simultaneously to give a directional beam at the difference frequency. By tilting the transmission beam, or by introducing time delays between the respective signals from hydrophones 5 of array 6, the transmission and reception beams are made to overlap, thus avoiding reception of noise from outside the area insonified by the transmission beam. Array 6 may be one, two or three-dimensional and towed directly from body 2 or from cable 3 or in conjunction with a sinker.
GB1271975A 1974-03-28 1975-03-26 Echo sounder systems utilizing non-linear acoustic signal interaction Expired GB1486068A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO741106 1974-03-28

Publications (1)

Publication Number Publication Date
GB1486068A true GB1486068A (en) 1977-09-14

Family

ID=19881539

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1271975A Expired GB1486068A (en) 1974-03-28 1975-03-26 Echo sounder systems utilizing non-linear acoustic signal interaction

Country Status (1)

Country Link
GB (1) GB1486068A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920330A1 (en) * 1979-05-19 1980-11-20 Krupp Gmbh Echo sounder with two transmission frequencies
FR2538124A1 (en) * 1982-12-17 1984-06-22 Thomson Csf ACOUSTIC SYSTEM WITH MULTIFACEAL PARAMETRIC ANTENNAS
FR2675587A1 (en) * 1991-04-16 1992-10-23 Thomson Csf METHOD OF COMPENSATING THE MOTION OF THE ANTENNA FOR A SONAR.
WO2007122267A1 (en) * 2006-04-26 2007-11-01 Thales Method for optimising the power supply to a linear transmitting aerial towed so as to transmit in omnidirectional mode

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920330A1 (en) * 1979-05-19 1980-11-20 Krupp Gmbh Echo sounder with two transmission frequencies
FR2538124A1 (en) * 1982-12-17 1984-06-22 Thomson Csf ACOUSTIC SYSTEM WITH MULTIFACEAL PARAMETRIC ANTENNAS
EP0114547A2 (en) * 1982-12-17 1984-08-01 Thomson-Csf Acoustic system with parametric multi-bundle antennas
EP0114547A3 (en) * 1982-12-17 1984-08-08 Thomson-Csf Acoustic system with parametric multi-bundle antennas
FR2675587A1 (en) * 1991-04-16 1992-10-23 Thomson Csf METHOD OF COMPENSATING THE MOTION OF THE ANTENNA FOR A SONAR.
WO1992018878A1 (en) * 1991-04-16 1992-10-29 Thomson-Csf Movement compensation method for a sonar antenna
AU658622B2 (en) * 1991-04-16 1995-04-27 Thomson-Csf Movement compensation method for a sonar antenna
US5428581A (en) * 1991-04-16 1995-06-27 Thomson - Csf Method for compensating for the movement of the antenna for a sonar
WO2007122267A1 (en) * 2006-04-26 2007-11-01 Thales Method for optimising the power supply to a linear transmitting aerial towed so as to transmit in omnidirectional mode
FR2900504A1 (en) * 2006-04-26 2007-11-02 Thales Sa METHOD FOR OPTIMIZING THE POWER SUPPLY OF A LINEAR TRANSMITTED TRANSMITTER ANTENNA FOR TRANSMITTING IN OMNIDIRECTIONAL MODE.
US7649809B2 (en) 2006-04-26 2010-01-19 Thales Method for optimizing the power supply for a towed linear transmit antenna for transmitting in omnidirectional mode

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee