GB1257836A - - Google Patents
Info
- Publication number
- GB1257836A GB1257836A GB1257836DA GB1257836A GB 1257836 A GB1257836 A GB 1257836A GB 1257836D A GB1257836D A GB 1257836DA GB 1257836 A GB1257836 A GB 1257836A
- Authority
- GB
- United Kingdom
- Prior art keywords
- inertia loading
- loading mass
- transducer
- sea water
- mass
- 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
Links
- 239000013535 sea water Substances 0.000 abstract 4
- 239000004411 aluminium Substances 0.000 abstract 3
- 229910052782 aluminium Inorganic materials 0.000 abstract 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 3
- 239000011358 absorbing material Substances 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 2
- 239000011133 lead Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 229920005549 butyl rubber Polymers 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
- B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
- B06B1/0674—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface and a low impedance backing, e.g. air
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
1,257,836. Subaqueous transducers. WESTINGHOUSE ELECTRIC CORP. 13 March, 1969 [13 March, 1968], No. 13256/69. Heading H4J. A pressure compensated transducer for subaqueous use at great depths comprises a piezoelectric transducer element 10 having its side and rear faces spaced by a distance d from an inertia loading mass 12, e.g. of aluminium, lead, brass or gold. A sound-absorbing material 14 such as butyl rubber in which is embedded aluminium powder or flake acts as a pressuretransmitting means. Its specific acoustic impedance approximately equals that of sea water. The distance d is n#/4 where n is an odd number and # is the wavelength of a wave in material 14 at the operating frequency or at a slightly different frequency. Inertia loading masses 20, 21 decouple unwanted radiation in the material 14 from the surrounding sea water. A cover 24 and transducer fluid 26 both have acoustic transmission characteristics similar to that of sea water. Preferably the inertia loading mass 12 is of aluminium one inch thick and the transducer operates at 60 kHz, whereby the impedance of the mass 12 is approximately twenty times that of sea water. In a second arrangement (Fig. 5, not shown) the inertia loading mass is of lead. A second outer inertia loading mass (42) is spaced a distance d<SP>1</SP> from the first, the intervening space being filled with further sound-absorbing material. In a further arrangement (Fig. 8, not shown) a single inertia loading mass is provided, but the intervening space is filled with silicone fluid, the transducer element being resiliently held by corrugated metal between the element and inertia loading mass. A disc-shaped transducer element is also envisaged. In all embodiments the transducers are operative at frequencies below 100 kHz and sound energy radiated from the rear and sides of the transducer element is substantially absorbed while a forward beam is obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71282968A | 1968-03-13 | 1968-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1257836A true GB1257836A (en) | 1971-12-22 |
Family
ID=24863718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1257836D Expired GB1257836A (en) | 1968-03-13 | 1969-03-13 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3480906A (en) |
| JP (1) | JPS4930743B1 (en) |
| FR (1) | FR2003837A1 (en) |
| GB (1) | GB1257836A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2290812A1 (en) * | 1974-11-08 | 1976-06-04 | Thomson Csf | ELECTROACOUSTIC TRANSDUCER FOR DEEP IMMERSION |
| JPS5920234B2 (en) * | 1979-09-27 | 1984-05-11 | 沖電気工業株式会社 | Ultrasonic transducer |
| US4380808A (en) * | 1981-02-06 | 1983-04-19 | Canadian Patents & Development Limited | Thinned array transducer for sonar |
| US5047996A (en) * | 1989-11-22 | 1991-09-10 | Westinghouse Electric Corp. | Sonar transducer |
| US5335209A (en) * | 1993-05-06 | 1994-08-02 | Westinghouse Electric Corp. | Acoustic sensor and projector module having an active baffle structure |
| US5532980A (en) * | 1994-11-14 | 1996-07-02 | Sciencetech Inc. | Vibrational anti-fouling system |
| DE19957125A1 (en) * | 1999-11-26 | 2001-06-21 | Siemens Ag | Ultrasound transducer |
| JP2012015680A (en) * | 2010-06-30 | 2012-01-19 | Toshiba Corp | Ultrasonic probe and ultrasonic diagnosis apparatus |
| JP2012205726A (en) | 2011-03-29 | 2012-10-25 | Toshiba Corp | Ultrasonic probe and ultrasonic probe manufacturing method |
| DE102011076224B4 (en) * | 2011-05-20 | 2021-09-30 | Ge Sensing & Inspection Technologies Gmbh | Ultrasonic probe and ultrasonic testing device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2534918A (en) * | 1948-12-11 | 1950-12-19 | Westinghouse Electric Corp | Apparatus for balancing rotors |
| US2761117A (en) * | 1952-01-16 | 1956-08-28 | Charles E Green | Directional transducer |
| US2753543A (en) * | 1952-08-28 | 1956-07-03 | Raytheon Mfg Co | Transducers |
| US2894317A (en) * | 1954-06-07 | 1959-07-14 | Spence T Marks | Method for constructing a barium titanate blast velocity gauge |
| US2925582A (en) * | 1956-02-22 | 1960-02-16 | Oflice Nat D Etudes Et De Rech | Acoustical firing indicator |
| US2956278A (en) * | 1957-10-22 | 1960-10-11 | Branchu Paul Joseph | Aircraft-guidance system |
| US3396286A (en) * | 1965-01-21 | 1968-08-06 | Linden Lab Inc | Transducer assembly for producing ultrasonic vibrations |
-
1968
- 1968-03-13 US US712829A patent/US3480906A/en not_active Expired - Lifetime
-
1969
- 1969-03-13 FR FR6907184A patent/FR2003837A1/fr not_active Withdrawn
- 1969-03-13 JP JP44018616A patent/JPS4930743B1/ja active Pending
- 1969-03-13 GB GB1257836D patent/GB1257836A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3480906A (en) | 1969-11-25 |
| JPS4930743B1 (en) | 1974-08-15 |
| FR2003837A1 (en) | 1969-11-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |