Bent piezoelectric-ceramic low-frequency underwater acoustic transducer

Abstract

The invention discloses a bent piezoelectric-ceramic low-frequency underwater acoustic transducer comprising a front radiation head, a tail mass block, a front curved beam, a rear curved beam, a front piezoelectric crystal pile, a rear piezoelectric crystal pile, a middle opposite-phase piezoelectric crystal pile, a shell and an output cable, wherein the front curved beam, the rear curved beam, the front radiation head and the tail mass block are respectively stuck on two ends of the piezoelectric crystal piles in a certain mode, and thus the piezoelectric crystal piles are in a 'Z'-shaped bending structure of a zigzag rule shape. The shell is combined with a seal ring to realize underwater sealing. The output cable is characterized in that the leads of the piezoelectric crystal piles are connected to an outer driving source by the tail mass block. In the bent piezoelectric-ceramic low-frequency underwater acoustic transducer, the volume space of the transducer is fully utilized, and the sounding power volume of the transducer is increased; and the longitudinal stretching vibration mode of the piezoelectric crystal piles and the bending vibration mode of the curved beams are fully combined to realize the characteristics of low frequency, light weight and small volume of the underwater acoustic transducer to coexist. The bent piezoelectric-ceramic low-frequency underwater acoustic transducer has the advantages of simple structure, low construction cost and wide application, and is convenient to manufacture and convenient to disassemble.

Description

technical field [0001] The invention relates to an underwater sound transducer, in particular to a folding piezoelectric ceramic low-frequency underwater sound transducer. The utility model belongs to the field of acoustic sensors, and is suitable for low-frequency underwater acoustic transducers used in water to realize mutual conversion of electro-acoustic energy and combined with sending and receiving. Background technique [0002] So far, using sound waves as information carriers is the most effective means of underwater detection, and underwater acoustic transducers are its indispensable key components. With the rapid development of modern sonar technology and the continuous improvement of application requirements, the low-frequency and light-weight miniaturization of underwater acoustic transducers has become an important trend in its development. At present, the widely used low-frequency transducers include: giant magnetostrictive low-frequency underwater acoustic tr...

AI Technical Summary

Problems solved by technology

[0007] In summary, the above-mentioned underwater acoustic transducers can easily realize low-frequency electro-acoustic conversion of 1-3kHz, but they have some common shortcomings and deficiencies in practical applications: (1). kilograms or even tens of kilograms); (2). Large volume; (3). Limited application (especially not conducive to array deployment); (4). High cost

Therefore, strictly speaking, although the above-mentioned transducers all have the characteristics of low frequency, they do not have absolute advantages in terms of lightness and small size.

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