FR2413666A1 - Directional channels former in sonar system - has hydrophones controlled by sampling signals with A=D converter connected to interpolation circuit - Google Patents
Directional channels former in sonar system - has hydrophones controlled by sampling signals with A=D converter connected to interpolation circuitInfo
- Publication number
- FR2413666A1 FR2413666A1 FR7739487A FR7739487A FR2413666A1 FR 2413666 A1 FR2413666 A1 FR 2413666A1 FR 7739487 A FR7739487 A FR 7739487A FR 7739487 A FR7739487 A FR 7739487A FR 2413666 A1 FR2413666 A1 FR 2413666A1
- Authority
- FR
- France
- Prior art keywords
- signals
- hydrophones
- controlled
- interpolation circuit
- former
- 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.)
- Granted
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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/80—Direction-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
- G01S3/802—Systems for determining direction or deviation from predetermined direction
- G01S3/805—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristics of a transducer or transducer system to give a desired condition of signal derived from that transducer or transducer system, e.g. to give a maximum or minimum signal
-
- 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
- G10K11/346—Circuits therefor using phase variation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The receiving antennal for sonal equipment comprise several hydrophones arranged in geometrical patterns. Signals arriving from a particular direction are formed into channels by a sampling system. Several non-directional hydrophones (C) receiving sonar signals have gating circuits(P) at their outputs whose opening is controlled by sampling signals (E) from a time base or clock (11). An OR-gate (12) allows signals to pass to an analogue-to-digital convertor (13) which generates binary word for each sample. An interpolation circuit (35) processes binary words by adding further binary samples to form signals for the different channels.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7739487A FR2413666A1 (en) | 1977-12-28 | 1977-12-28 | Directional channels former in sonar system - has hydrophones controlled by sampling signals with A=D converter connected to interpolation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7739487A FR2413666A1 (en) | 1977-12-28 | 1977-12-28 | Directional channels former in sonar system - has hydrophones controlled by sampling signals with A=D converter connected to interpolation circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2413666A1 true FR2413666A1 (en) | 1979-07-27 |
FR2413666B1 FR2413666B1 (en) | 1982-12-17 |
Family
ID=9199439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7739487A Granted FR2413666A1 (en) | 1977-12-28 | 1977-12-28 | Directional channels former in sonar system - has hydrophones controlled by sampling signals with A=D converter connected to interpolation circuit |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2413666A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677132A1 (en) * | 1991-05-28 | 1992-12-04 | Thomson Csf | METHOD FOR FORMING A PLURALITY OF SONAR PATHWAYS AND DEVICE FOR CARRYING OUT SAID METHOD. |
EP0642032A2 (en) * | 1993-09-08 | 1995-03-08 | ISHIKAWA MANUFACTURING CO., Ltd. | Sound source determining system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1173365A (en) * | 1965-08-30 | 1969-12-10 | Magnavox Co | Improvements in or relating to beam forming apparatus |
-
1977
- 1977-12-28 FR FR7739487A patent/FR2413666A1/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1173365A (en) * | 1965-08-30 | 1969-12-10 | Magnavox Co | Improvements in or relating to beam forming apparatus |
Non-Patent Citations (1)
Title |
---|
NV8014/77 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677132A1 (en) * | 1991-05-28 | 1992-12-04 | Thomson Csf | METHOD FOR FORMING A PLURALITY OF SONAR PATHWAYS AND DEVICE FOR CARRYING OUT SAID METHOD. |
WO1992021991A1 (en) * | 1991-05-28 | 1992-12-10 | Thomson-Csf | Method for forming a plurality of sonar channels and device for implementing such method |
EP0642032A2 (en) * | 1993-09-08 | 1995-03-08 | ISHIKAWA MANUFACTURING CO., Ltd. | Sound source determining system |
EP0642032A3 (en) * | 1993-09-08 | 1995-11-22 | Ishikawa Manufacturing Co Ltd | Sound source determining system. |
Also Published As
Publication number | Publication date |
---|---|
FR2413666B1 (en) | 1982-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |