Two-dimensional airfoil coseismic vector hydrophone and its process
A vector hydrophone, two-dimensional airfoil technology, applied in the direction of transducers used underwater, vibration measurement in fluids, instruments, etc., can solve the problems of limited application, many demands, large geometric size, etc. Good sensitivity and phase characteristics, good cosine directivity, and small geometric size
Inactive Publication Date: 2009-03-18
HARBIN ENG UNIV
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Problems solved by technology
Although the vector hydrophone has high sensitivity, its large geometric size, heavy weight, and high density severely limit its application in engineering
As we all know, the field of underwater acoustic engineering pays more attention to the array technology, and there are more demands. If the low-frequency vector hydrophone imitating Russia is used to study the array technology, the aperture of the array will increase and the weight will be too heavy, which is extremely inconvenient for engineering use.
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[0017] First, the low-density composite material mixed with epoxy resin and glass beads is added to the curing agent, poured into the mold, dried and demoulded to form a rectangular outer shell with wire holes [3][4] Next, place the double laminations in it respectively, then place the four rectangular outer shells [4] symmetrically in airfoil shape on both sides of the cylindrical base [5], and finally mix epoxy resin and glass beads The low-density composite material is integrally potted to form a hydrophone, and its cable output end [6] is placed on the upper end surface of the cylindrical base [5], and the upper and lower end surfaces of the rectangular outer casing [4] of the hydrophone are respectively reserved symmetrically. There are 8 hanging holes [7]. Among them, the double laminations are generally made of piezoelectric ceramic discs or rectangular plates and aluminum alloy materials. At present, the overall shell diameter of the hydrophone sample is 80mm, the wei...
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Hydrophone is composed of quadrate external case, dual pieces of lamination inside case, cylindrical base for placing quadrate external cases in wing profile type. Using mould, the technique prepares the quadrate external case from admixture of epoxy resin in low density and micro glass bead. Comparing with vectorial hydrophone in low frequency in other structure, the disclosed hydrophone possesses advantages of small size, lightweight, good directivity, sensitivity of channels and phase characteristics so as to solve issue of designing sonar array. The invention can widely applicable to each area of hydroacoustics such as sonobuoy, navigation for torpedo, submarine communication system to execute high-frequency measurement task.
Description
technical field [0001] The invention relates to a two-dimensional airfoil co-vibration vector hydrophone using double laminations as sensitive elements and its technology. Background technique [0002] At the beginning of this century, one of the most promising research directions in the field of underwater acoustic technology in my country is vector hydrophone technology. Vector hydrophone (vector hydrophone) is usually also called vector sensor (vector sensor), which can measure the sound pressure and particle vibration velocity, or sound pressure and particle acceleration, or sound Scalar and vector information in the underwater sound field such as pressure and sound pressure gradient. [0003] According to different working principles, vector hydrophones can be divided into two categories: differential pressure vector hydrophones (also known as double sound pressure vector hydrophones) and co-vibration vector hydrophones. According to the different materials of sensiti...
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IPC IPC(8): G01H3/00H04R1/44
Inventor 陈洪娟洪连进
Owner HARBIN ENG UNIV