High-frequency broadband underwater acoustic transducer based on acoustic impedance gradient matching layer
An underwater acoustic transducer and matching layer technology, which is applied to underwater transducers, piezoelectric/electrostrictive transducers, sensors, etc., can solve impedance mismatch, reduce transducer transmission efficiency, It is impossible to realize the problem of high frequency broadband signal transmission of the transducer, so as to solve the impedance mismatch and reduce the transmission loss.
Active Publication Date: 2020-12-04
上海船舶电子设备研究所
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Problems solved by technology
The shortcoming of the technical solution lies in the impedance mismatch between the piezoelectric composite sheet and the water, which reduces the transmission efficiency of the transducer in water, and cannot realize the high-frequency broadband signal transmission of the transducer in water
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[0053] Figure 1 ~ Figure 3 A schematic diagram of a high-frequency broadband underwater acoustic transducer based on an acoustic impedance gradient matching layer provided by the present invention.
[0054] The high-frequency broadband underwater acoustic transducer based on the acoustic impedance gradient matching layer provided by the present invention, such as figure 1 As shown, it includes a backing 1 , an active material layer 2 , a uniform matching layer 3 , a gradient matching layer 4 and a waterproof and sound-permeable layer 5 . The backing 1, the active material layer 2, the uniform matching layer 3, the gradient matching layer 4 and the waterproof and sound-permeable layer 5 are arranged in sequence. The backing 1 and the active material layer 2 are firmly bonded by conductive glue.
[0055] The uniform matching layer 3 is tightly connected to the active material layer 2, the gradient matching layer 4 is tightly connected to the uniform matching layer 3, the wate...
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The invention provides a high-frequency broadband underwater acoustic transducer based on an acoustic impedance gradient matching layer. The high-frequency broadband underwater acoustic transducer comprises a backing, an active material layer, a uniform matching layer, a gradient matching layer and a waterproof sound transmission layer; wherein the backing, the active material layer, the uniform matching layer, the gradient matching layer and the waterproof sound transmission layer are arranged in sequence; the backing is fixedly connected with the active material layer; the uniform matching layer is fixedly connected with the active material layer; the gradient matching layer is fixedly connected with the uniform matching layer; the waterproof sound transmission layer is fixedly connectedwith the gradient matching layer; the gradient matching layer comprises a gradient matching layer frame and a filling cone, and the characteristic impedance value of the gradient matching layer changes in an exponential attenuation mode in the sound propagation direction. The high-frequency broadband underwater acoustic transducer based on the acoustic impedance gradient matching layer provided by the invention solves the problem that the transducer cannot transmit a high-frequency broadband signal in water due to low transmission efficiency caused by impedance mismatch between a piezoelectric material and the water.
Description
technical field [0001] The invention relates to the field of underwater acoustic transducers, in particular to a high-frequency broadband underwater acoustic transducer based on an acoustic impedance gradient matching layer. Background technique [0002] With the continuous development of underwater acoustic signal processing technology in sonar systems and the deepening of ocean development, high-frequency sonar has been paid more and more attention. High-frequency sonar often requires broadband work. On the one hand, high-frequency broadband sonar can obtain more information characteristics of the target and improve the detection effect of the target; on the other hand, it can also work at selected frequencies to effectively avoid co-frequency interference during coordinated operations. The high-frequency broadband underwater acoustic transducer is the basis for the generation and acquisition of high-frequency broadband sonar signals. Therefore, the broadband characterist...
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IPC IPC(8): H04R17/00H04R1/44
CPCH04R1/44H04R17/00H04R2217/00
Inventor 卞加聪王艳沈明杰赵慧孙逸来
Owner 上海船舶电子设备研究所