GB1125152A - Improvements in or relating to sub-aqueous pressure wave sonar systems - Google Patents

Improvements in or relating to sub-aqueous pressure wave sonar systems

Info

Publication number
GB1125152A
GB1125152A GB237565A GB237565A GB1125152A GB 1125152 A GB1125152 A GB 1125152A GB 237565 A GB237565 A GB 237565A GB 237565 A GB237565 A GB 237565A GB 1125152 A GB1125152 A GB 1125152A
Authority
GB
United Kingdom
Prior art keywords
array
raster
pulse
transducer
strictive
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
GB237565A
Inventor
John Arthur Glasgow
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB237565A priority Critical patent/GB1125152A/en
Publication of GB1125152A publication Critical patent/GB1125152A/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
    • G01S15/06—Systems determining the position data of a target
    • G01S15/42—Simultaneous measurement of distance and other co-ordinates
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/56—Display arrangements
    • G01S7/62—Cathode-ray tube displays
    • G01S7/6218—Cathode-ray tube displays providing two-dimensional coordinated display of distance and direction
    • G01S7/6227—Plan-position indicators, i.e. P.P.I.

Landscapes

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

Abstract

1,125,152. Sonar systems; magnetostrictive transducers. MARCONI CO. Ltd. 3 Dec., 1965 [19 Jan., 1965], No. 2375/65. Headings H4D and H4J. In a sonar system a sub-aqueous region is scanned rapidly in the azimuthal plane by periodically transmitting an extended pulse of pressure waves substantially isotropically and sweeping the direction of maxium received signal strength of a directional receiving transducer array over at least a fraction of the azimuthal plane during the transmission of the pulse. In the embodiment illustrated in Fig. 1 (provisional), a 50kc/s acoustic pulse is transmitted by a cylindrical magneto-strictive transducer 3 for every 8À1 revolutions of a magneto-strictive receiving array 15 about a vertical axis 5, the pulse duration (150ms) being approximately equal to the period of rotation of the array 15. Timebase generators 9 and 11, synchronized with the rotation of the array 15, provide deflection waveforms for a cathode ray tube 14 the beam of which is intensity-modulated by target echo signals received by the array 15, and produce a raster which comprises ten inter-leaved spirals of eight turns each, the start of each spiral corresponding to the initiation of a transmitted acoustic pulse. The use of such a "tenstart" raster enables a target range resolution (in the resulting P.P1 display) equivalent to that given by a raster comprising a single 80-turn spiral to be obtained at one-tenth the receiving array rotation rate that would be required for the single-spiral raster. Target range gating may be provided by gating an echo signal amplifier 16. Transducer construction:-The transmitting transducer (Fig. 2, provisional, not shown) comprises a toroidally-wound stack of annular magneto-strictive laminae (31). The receiving array (Fig. 3, provisional, not shown) comprises a 2 feet row of cores, each core comprising a stack of #-shaped laminae. A winding (153) is wound over the "legs" of the # and the array is polarised by a permanent magnet.
GB237565A 1965-01-19 1965-01-19 Improvements in or relating to sub-aqueous pressure wave sonar systems Expired GB1125152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB237565A GB1125152A (en) 1965-01-19 1965-01-19 Improvements in or relating to sub-aqueous pressure wave sonar systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB237565A GB1125152A (en) 1965-01-19 1965-01-19 Improvements in or relating to sub-aqueous pressure wave sonar systems

Publications (1)

Publication Number Publication Date
GB1125152A true GB1125152A (en) 1968-08-28

Family

ID=9738445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB237565A Expired GB1125152A (en) 1965-01-19 1965-01-19 Improvements in or relating to sub-aqueous pressure wave sonar systems

Country Status (1)

Country Link
GB (1) GB1125152A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3236209A1 (en) * 1982-09-30 1984-04-05 Fried. Krupp Gmbh, 4300 Essen ACOUSTIC UNDERWATER ANTENNA WITH SYNTHETIC APERTURE
GB2133151A (en) * 1983-01-05 1984-07-18 Shell Int Research Surveying positions of mooring lines
DE3828151A1 (en) * 1988-08-19 1990-02-22 Honeywell Elac Nautik Gmbh UNDERWATER ARROW DEVICE
CN105989205A (en) * 2015-02-13 2016-10-05 北京机电工程研究所 Method for determining aircraft surface pulsating pressure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3236209A1 (en) * 1982-09-30 1984-04-05 Fried. Krupp Gmbh, 4300 Essen ACOUSTIC UNDERWATER ANTENNA WITH SYNTHETIC APERTURE
GB2133151A (en) * 1983-01-05 1984-07-18 Shell Int Research Surveying positions of mooring lines
DE3828151A1 (en) * 1988-08-19 1990-02-22 Honeywell Elac Nautik Gmbh UNDERWATER ARROW DEVICE
CN105989205A (en) * 2015-02-13 2016-10-05 北京机电工程研究所 Method for determining aircraft surface pulsating pressure
CN105989205B (en) * 2015-02-13 2019-04-23 北京机电工程研究所 The determination method of aircraft surface fluctuation pressure

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