High frequency broadband underwater acoustic transducer based on acoustic impedance gradient matching layer
A technology for underwater acoustic transducers and matching layers, applied to transducers used underwater, piezoelectric/electrostrictive transducers, sensors, etc., can solve impedance mismatch, reduce transducer transmission efficiency, Problems such as high-frequency broadband signal transmission of the transducer cannot be realized, and the effect of solving impedance mismatch and reducing transmission loss can be achieved
Active Publication Date: 2021-07-30
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, comprising a backing, an active material layer, a uniform matching layer, a gradient matching layer and a waterproof sound-permeable layer; the backing, the active material The layer, the uniform matching layer, the gradient matching layer and the waterproof and sound-permeable layer are arranged in sequence; the backing is firmly connected to the active material layer; the uniform matching layer is firmly connected to the active material layer; the gradient matching layer is firmly connected to the uniform matching layer The waterproof sound-permeable layer is firmly connected with the gradient matching layer; the gradient matching layer includes a gradient matching layer frame and a filling cone, and the characteristic impedance value of the gradient matching layer decays exponentially in the sound propagation direction. The high-frequency broadband underwater acoustic transducer based on the acoustic impedance gradient matching layer provided by the present invention solves the problem that the impedance mismatch between the piezoelectric material and water leads to low transmission efficiency and the transducer cannot transmit high-frequency broadband signals in 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