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Sonar transducer housing

阅读:762发布:2024-02-27

专利汇可以提供Sonar transducer housing专利检索,专利查询,专利分析的服务。并且A solid block of material has an outer surface shaped to be streamlined, or otherwise present little flow resistance within a liquid medium; the block has a base, and an inner surface which surrounds the outer surface of transducer elements, the entire volume of the solid block and the material between the outer surface thereof and the inner surface of the transducer elements being homogeneous throughout and of a material which is permeable to sound waves created by the transducer element, the material having a specific gravity similar to that of the liquid medium and propagating sound waves therethrough at a velocity substantially similar to the velocity of propagation of sound waves through the liquid, the transducer being located within the block at a distance which is large with respect to the wave lengths of the waves propagated by the transducer through the block of material. To make this transducer, a mold is provided having a desired exterior outline and then the transducer, or a mold form is inserted therein and elastic material is poured into the mold and permitted to harden to form the housing.,下面是Sonar transducer housing专利的具体信息内容。

1. Sonar transducer housing, usable at great depths in a liquid medium and embodying a streamlined dome for mechanical protection and separation from said medium of associated electroacoustical transducer elements (1) when the housing is immersed, said housing comprising a large mass dome block (3) of a polymer material of poly isocyanate crosslinked with polyols having an outer surface coming in contact with said liquid medium (4), and inner surfaces provided for closely surrounding the outer surfaces of at least one said transducer element (1) and the corresponding electrical connections (2) therefor, said block (3) being mounted on an acoustically insulated support base (6), the entire internal volume of said dome, defined by the said block outer and inner surfaces, being solid and homogeneous throughout; said material being transparent to elastic longitudinal waves propagated therethrough and having the combination of features a. a shear modulus of substantially zero, b. a specific gravity substantially identical to that of the liquid medium, and c. the velocity of elastic wave propagation therethrough being substantially the same velocity as the velocity of propagation in said liquid medium; the space within said dome provided for the transducer operating on a given wave-band being such that the designed distance separating any of its surfaces from any said outer dome surfaces is substantially larger than the wave length of the propagated waves.
2. Sonar housing according to claim 1, wherein the poly-isocyanate comprises a polyether poly-isocyanate crosslinked by mixture with at least one of diols or triols.
3. Sonar housing according to claim 1, wherein the specific gravity of the dome block is approximately equal to that of sea water and the hardness of the polymer is in the range of 60A shores.
4. Sonar housing according to claim 1, wherein the outer surface of said block of material is streamlined into hydrodynamic form to reduce liquid flow noises upon relative movement of said block and said fluid medium.
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