EP0317052A2 - Réseau de transducteurs - Google Patents
Réseau de transducteurs Download PDFInfo
- Publication number
- EP0317052A2 EP0317052A2 EP88307808A EP88307808A EP0317052A2 EP 0317052 A2 EP0317052 A2 EP 0317052A2 EP 88307808 A EP88307808 A EP 88307808A EP 88307808 A EP88307808 A EP 88307808A EP 0317052 A2 EP0317052 A2 EP 0317052A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- transducer
- elements
- array
- panel member
- transducer elements
- 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
Images
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
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
- G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys
- G10K11/008—Arrays of transducers
Definitions
- This invention relates to an acoustic transducer. It relates particularly to a transducer capable of being used in a passive sonar system.
- transducer for detecting a transducer wave
- the transducer comprising an array of transducer elements, each transducer element having a spatial transducer response and a working aperture for receiving the acoustic wave, at least one transducer element of the array having a non-uniform spatial filter response across its working aperture thereby to attenuate the response of the transducer to spatial noise lying outside the spectrum of an acoustic wave to be detected by the transducer.
- the array is rectangular in form and the transducer elements elliptical in shape, with elements closer to the centre of the array being larger in size. Such an array is preferred in order to reject noise arising from water flow in the horizontal direction while being highly sensitive to acoustic signals in directions other than horizontal.
- transducer elements Whilst such an arrangement has been found to be effective in operation, a problem has been found in that the elliptical transducer elements may be difficult to construct from the ceramic material which is normally used for such elements (PZT ceramic is commonly used). Furthermore the different sizes of elements required produce further difficulties in fabrication and assembly. Use of a simpler shape of transducer element, such as circular or rectangular would bring about a significant savings in cost of fabrication and assembly. However, such transducer being of a simple shape would not be suitable in a rectangular array of elements, since the response of the array to acoustic signals would be similar to that of a diffraction grating, being highly sensitive to certain wavenumbers ( k , having magnitude and direction) and relatively insensitive to other wavenumbers.
- a further problem which has been found with an arrangement as claimed in our copending application 8611573 (F13438) is that a hydrophone formed in the shape of a tile to be affixed to the hull of as vessel may have any orientation, particularly when a large array of tiles are to be affixed to a hull.
- a tile having a highly directional sensitivity is therefore disadvantageous if it is not possible to affix the tile in its intended orientation for use.
- transducer for detecting an acoustic wave
- the transducer being in the form of a tile and comprising a flexible panel memeber for affixing to the hull of a vessel, the panel member having an array of apertures into which are inserted an array of transducer elements, the array being wholly or partially random, or pseudo-random in regard to the spacing and relative direction between the elements so as to provide a response of intensity v. wavenumber which is generally uniform or not significantly non-uniform for acoustic waves received from any direction.
- the desired filter reponse is provided by introducing a degree of randomness or psseudorandomness is in the spacing and relative directions of the transducer elements.
- a directionally uniform response will enable the tile to be positioned in any orientation on a vessel hull without affecting the intended filter response.
- each transducer element may be circular or rectangular for simplicity in production.
- a completely random array would be preferred this is impossible to achieve given the requirement for a relatively large number of transucer elements within a small surface area of tile. It is therefore necessary to effect a compromise between the various factors involved so as to generate a degree of randomness which provides the desired uniformity of direcitonal response, whilst maintining a sufficient aperture, sensitivity etc.
- the precise configuration may be determined on a trial-and-error basis and/or by application of computer modelling techniques.
- a preferred configuration is to provide the transucer elements in a series of concentric rings which are circular or polygonal but the elements being so disposed so as to create the appearance of randomness to received acoustic waves.
- FIG. 1 a sheet of polyurethane 2 into which is punched a series of holes 4 whose accuracy is controlled by a computer generated template.
- a ceramic thin disc of lead titanate is cemented into each aperture, leaving the flat surfaces flush with the polyurethane sheet.
- the ceramic discs have one terminal on each flat face, which are electrically connected to a matrix of wires 8 (See Figure 2), each side being treated separately, with a flying lead being brought from each side to electronics module 10 a , 10 b , 10 c , 10 d .
- the matrix of wires are arranged in a series of rings 8′ with diagonal wires 8 ⁇ .
- the modules 10 a - d are mounted on PCBs on the edge of the sheet and include signal processing and filter circuits (these are not relevant to the present invention and will not be described).
- the electronics modules are encapsulated in a suitable plastics material and are clipped by means of lugs 12 to the edge of the polythene sheet, the flying leads from the ceramic disc being soldered to posts on sections 14 a - d of the printed circuit board protruding from the encapsulation.
- a main cable 16 is attached to the posts on the printed circuit board and the whole assembly is located in a mould tool with suitable spacers to enable a uniform thickness of polyurethane overmoulding to be maintained.
- the main cable is clamped in position in the mould tool sides during the encapsulation process.
- the ceramic elements 6 are circular in shape and therefore have individually a directionally uniform filter response.
- the entire array of transducer elements produces a response which is shown in Figres 3, 4 and 5 as intensity vs. wavenumber for various directions of incoming acoustic waves.
- the precise array chosen comprises a series of rings having a common centre, a transducer 6 a being located at the centre.
- An inner ring is formed of 5 transducer elements 6 b located approximately in a circle, a central ring is provided by ceramic elements 6 c arranged in a ring having the approximate shape of a hexagon, and an outer ring comprising elements 6 d is formed in the approximate shape of an octagon.
- the overall configuration of elements has a large degree of randomness of spacing and direction between the individual elements. It has been found through experiment that such a configuration provides a desired spatial filter response.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8726987 | 1987-11-18 | ||
GB8726987A GB2212693B (en) | 1987-11-18 | 1987-11-18 | Transducer array |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0317052A2 true EP0317052A2 (fr) | 1989-05-24 |
EP0317052A3 EP0317052A3 (en) | 1989-08-30 |
EP0317052B1 EP0317052B1 (fr) | 1992-05-06 |
Family
ID=10627153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880307808 Expired EP0317052B1 (fr) | 1987-11-18 | 1988-08-24 | Réseau de transducteurs |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0317052B1 (fr) |
DE (1) | DE3870814D1 (fr) |
GB (1) | GB2212693B (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2691596A1 (fr) * | 1992-05-22 | 1993-11-26 | Thomson Csf | Antenne acoustique sous-marine à capteur surfacique. |
EP0718640A3 (fr) * | 1994-12-20 | 1998-01-07 | STN ATLAS Elektronik GmbH | Antenne remorquée |
WO2001042815A1 (fr) * | 1999-12-10 | 2001-06-14 | Board Of Trustees Operating Michigan State University | Reseau de capteurs sismiques |
US7339521B2 (en) * | 2002-02-20 | 2008-03-04 | Univ Washington | Analytical instruments using a pseudorandom array of sources, such as a micro-machined mass spectrometer or monochromator |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB641346A (en) * | 1941-11-07 | 1950-08-09 | Raytheon Mfg Co | Improvements in or relating to piezoelectric transducer |
US2911484A (en) * | 1954-06-28 | 1959-11-03 | Gen Electric | Electro-acoustic transducer |
FR2350758A1 (fr) * | 1976-05-03 | 1977-12-02 | Anvar | Capteurs piezoelectriques et appareils equipes de ces capteurs pour etalonner des generateurs d'ondes acoustiques |
WO1987007069A1 (fr) * | 1986-05-12 | 1987-11-19 | Plessey Overseas Limited | Transducteur acoustique |
-
1987
- 1987-11-18 GB GB8726987A patent/GB2212693B/en not_active Expired - Lifetime
-
1988
- 1988-08-24 EP EP19880307808 patent/EP0317052B1/fr not_active Expired
- 1988-08-24 DE DE8888307808T patent/DE3870814D1/de not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB641346A (en) * | 1941-11-07 | 1950-08-09 | Raytheon Mfg Co | Improvements in or relating to piezoelectric transducer |
US2911484A (en) * | 1954-06-28 | 1959-11-03 | Gen Electric | Electro-acoustic transducer |
FR2350758A1 (fr) * | 1976-05-03 | 1977-12-02 | Anvar | Capteurs piezoelectriques et appareils equipes de ces capteurs pour etalonner des generateurs d'ondes acoustiques |
WO1987007069A1 (fr) * | 1986-05-12 | 1987-11-19 | Plessey Overseas Limited | Transducteur acoustique |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2691596A1 (fr) * | 1992-05-22 | 1993-11-26 | Thomson Csf | Antenne acoustique sous-marine à capteur surfacique. |
WO1993024244A1 (fr) * | 1992-05-22 | 1993-12-09 | Thomson-Csf | Antenne acoustique sous-marine a capteur surfacique |
US5517467A (en) * | 1992-05-22 | 1996-05-14 | Thomson-Csf | Undersea acoustic antenna with surface sensor |
EP0718640A3 (fr) * | 1994-12-20 | 1998-01-07 | STN ATLAS Elektronik GmbH | Antenne remorquée |
WO2001042815A1 (fr) * | 1999-12-10 | 2001-06-14 | Board Of Trustees Operating Michigan State University | Reseau de capteurs sismiques |
US6532190B2 (en) | 1999-12-10 | 2003-03-11 | Board Of Trustees Operating Michigan State University | Seismic sensor array |
US7339521B2 (en) * | 2002-02-20 | 2008-03-04 | Univ Washington | Analytical instruments using a pseudorandom array of sources, such as a micro-machined mass spectrometer or monochromator |
Also Published As
Publication number | Publication date |
---|---|
GB2212693B (en) | 1991-08-14 |
EP0317052A3 (en) | 1989-08-30 |
EP0317052B1 (fr) | 1992-05-06 |
GB8726987D0 (en) | 1988-02-17 |
GB2212693A (en) | 1989-07-26 |
DE3870814D1 (de) | 1992-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4104550B2 (ja) | 超音波プリント回路基板トランスデューサ | |
US4910840A (en) | Electroacoustic transducer of the so-called "electret" type, and a method of making such a transducer | |
US6909354B2 (en) | Electronic pressure sensitive transducer apparatus and method for manufacturing same | |
US5655276A (en) | Method of manufacturing two-dimensional array ultrasonic transducers | |
US3833825A (en) | Wide-band electroacoustic transducer | |
US4371805A (en) | Ultrasonic transducer arrangement and method for fabricating same | |
CA2117931A1 (fr) | Reseau de microphones adaptatif | |
EP0317052B1 (fr) | Réseau de transducteurs | |
WO2006076512A1 (fr) | Plaque perforee a graphique encastre | |
WO2008108894A2 (fr) | Agencement de réseau de transducteurs et fonctionnement pour les applications de sodar | |
US3638052A (en) | Electroacoustic transducers of the bilaminar flexural vibrating type | |
US20040047239A1 (en) | Shaped piezoelectric composite array | |
US3393400A (en) | Calibration method using transducer array with constant pressure plane wave near-field | |
US7176602B2 (en) | Method and device for ensuring trandsducer bond line thickness | |
US9286418B1 (en) | Method for designing an acoustic array | |
GB1457297A (en) | Grouping of electro-acoustic transducers particularly for use in underwater detection systems | |
JP2940110B2 (ja) | 超音波探触子 | |
US3364461A (en) | Transducer array with constant pressure, plane wave near-field | |
KR20240000518A (ko) | 마이크 어레이 | |
AU2021224835B2 (en) | Waterborne sound transducer | |
US6661739B1 (en) | Filigree electrode pattern apparatus for steering parametric mode acoustic beams | |
JPH03120747A (ja) | フィルムキャリア製造用のフィルム材およびフィルムキャリアの製造方法 | |
US6561034B2 (en) | Ultrasonic sparse imaging array | |
JP3459136B2 (ja) | 音響トランスデューサー | |
WO1987007069A1 (fr) | Transducteur acoustique |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): BE DE ES FR GR IT NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE DE ES FR GR IT NL SE |
|
17P | Request for examination filed |
Effective date: 19900125 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GEC-MARCONI LIMITED |
|
17Q | First examination report despatched |
Effective date: 19910709 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE ES FR GR IT NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19920506 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19920506 Ref country code: BE Effective date: 19920506 |
|
REF | Corresponds to: |
Ref document number: 3870814 Country of ref document: DE Date of ref document: 19920611 |
|
ET | Fr: translation filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19920807 Year of fee payment: 5 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19920817 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19920817 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19920824 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19920831 Year of fee payment: 5 Ref country code: NL Payment date: 19920831 Year of fee payment: 5 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19930825 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19940301 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19940429 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19940503 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 88307808.1 Effective date: 19940310 |