Ultra-low frequency underwater acoustic transducer
An underwater acoustic transducer and ultra-low frequency technology, applied in the direction of sound-producing equipment, instruments, etc., can solve problems such as large performance impact, and achieve the effect of improving radiation capacity and realizing ultra-low frequency.
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Embodiment 1
[0026] With reference to Fig. 1, make an ultra-low frequency underwater acoustic transducer of the present invention, the shell of this underwater acoustic transducer is made up of primary curved beam 4, secondary curved beam 11, T-shaped mass yoke 9 and first protrusion 1, All are made of stainless steel. The first-level bending beam 4 and the second-level bending beam 11 form a composite bending beam, whose cross-sectional shape is similar to a "bow" shape, and the bending-tension shell of the composite beam is a translational body with a "bow"-shaped section, and the two ends of the translational body are not closed . The thickness of the T-shaped mass yoke in this embodiment is 40 mm. In this embodiment, the primary bending beam 4 and the secondary bending beam 11 adopt the same wall thickness, which is 15 mm.
[0027] The first protrusion 1 is connected to the primary bending beam 4. The surface of the first protrusion 1 is in the shape of a convex arc. The surface of 2...
Embodiment 2
[0034] As shown in FIG. 2 , in this embodiment, a piezoelectric ceramic stack 7 is used as a driving element. The piezoelectric ceramic stack 7 is formed by bonding rectangular piezoelectric ceramic sheets, and the ceramic sheets are connected in parallel in circuit form. The prestressing method of the piezoelectric ceramic stack 7 is the same as that of the first embodiment.
[0035] Other parts of this embodiment are identical to Embodiment 1.
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