A vibration-balanced low-noise deep-sea hydrophone and its manufacturing method
A technology of vibration balance and manufacturing method, applied to transducers, instruments, sensors, etc. used underwater, can solve the problems of poor anti-shock noise performance, low hydrostatic pressure resistance, etc., achieve low cost, ensure effectiveness, and avoid The effect of oil-filled process equipment
Active Publication Date: 2022-07-01
中国科学院声学研究所北海研究站
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Problems solved by technology
[0005] The object of the present invention is to provide a vibration-balanced low-noise deep-sea hydrophone and its manufacturing method, which solves the technical problems of poor anti-shock noise performance and low hydrostatic pressure resistance of existing hydrophones under dynamic use conditions , so that the anti-shock noise deep sea phone has the characteristics of high sensitivity, anti-shock noise and low cost, not only can maintain stable performance in a dynamic environment, but also can work under the special conditions of high hydrostatic pressure in the deep sea
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[0038] In order to more clearly illustrate the technical features of the solution, the solution will be described below through specific implementations.
[0039] see figure 1 , the present invention uses two piezoelectric ceramic tubes with dimensions of Φ25×Φ19×30 to be connected in parallel, and their size and quantity determine the final performance of the hydrophone. The oily medium (usually silicone oil) can freely enter and exit the inner and outer cavities of the piezoelectric ceramic tube 1 to achieve pressure balance; the middle metal block 3 is made of brass or stainless steel, and is symmetrically installed with the two piezoelectric ceramics at both ends. Pipe 1 together constitutes the key structure of the hydrophone. Among them, the sound-transmitting oil bag is required to have both watertight and sound-transmitting functions, and at the same time, it requires excellent oil resistance. , oil resistance, sound permeability are excellent;
[0040] like figure...
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The invention provides a vibration-balanced low-noise deep-sea hydrophone and a manufacturing method thereof, comprising a metal block, a piezoelectric ceramic tube symmetrically arranged on both sides of the metal block, an end cover, a sound-transmitting oil bag, and a sound-transmitting oil bag sealed in the sound-transmitting oil The base of the opening of the bag and the watertight connector connected to the outside of the base are also provided with oil injection holes; one end of the piezoelectric ceramic tube is perpendicular to the metal block, and the other end is connected to the end cover, which is provided with an oil inlet Holes and wire holes, metal blocks and piezoelectric ceramic tubes are all set in the sound-transmitting oil bag, which is also filled with oily medium, and the water-tight connector is connected to the positive and negative electrodes of the piezoelectric ceramic for signal transmission. The hydrophone of the invention adopts the structural symmetry design, uses the acceleration cancellation principle, greatly reduces the influence of the external vibration transmission on the acceleration sensitivity and the receiving sensitivity of the hydrophone, and has the advantages of strong anti-shock vibration noise and anti-hydrostatic pressure. Features of high and high sensitivity.
Description
technical field [0001] The invention belongs to the technical field of marine detection and sonar, in particular, the invention relates to a vibration-balanced low-noise hydrophone that can be used under high hydrostatic pressure and a manufacturing method thereof. Background technique [0002] The urgent need for the exploration and development of submarine geology and marine resources promotes the continuous development of deep-sea exploration and delivery equipment. As the main window for the sonar system to exchange information with the outside world, the underwater acoustic transducer determines the performance of the entire sonar system and even the entire detection equipment. performance indicators. In order to meet the requirements of high hydrostatic pressure conditions in the deep sea, underwater acoustic transducers usually adopt special structural designs, such as pressure relief mechanism, pressure compensation mechanism, oil-filled type, overflow type, etc. In...
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IPC IPC(8): H04R31/00H04R1/44H04R17/00G01H11/08G01S7/521
CPCH04R31/00H04R1/44H04R17/00G01H11/08G01S7/521
Inventor 褚广宇潘耀宗王帅司泽宇
Owner 中国科学院声学研究所北海研究站