Piezoelectric cylindrical tube hydrophone with small size and high receiving sensitivity
A technology of receiving sensitivity and piezoelectric circular tube is applied in the field of piezoelectric circular tube hydrophone, which can solve the problems of low sensitivity and large volume, and achieve the effects of high receiving sensitivity, improved receiving sensitivity, and easy production.
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[0018] The present invention provides a piezoelectric circular tube hydrophone with small volume and high receiving sensitivity, such as figure 1 shown. The piezoelectric circular tube hydrophone includes a plurality of circular tubes 1 , and the end faces in the vertical direction are glued between every two circular tubes through a decoupling element 2 . Specifically, according to the simulation and actual test results, the number of the circular tubes is optimally determined, so that the receiving sensitivity of the hydrophone meets the requirements, and at the same time, the output impedance of the hydrophone can be satisfied to facilitate the input matching of the back-end preamplifier.
[0019] see figure 2 , the circular tube 1 includes a piezoelectric ceramic 11, a wedge-shaped strip 12 and an electrode sheet 13, and the piezoelectric ceramic 11, the wedge-shaped strip 12 and the electrode sheet 13 are glued together by a polymer adhesive Form a round tube on the mo...
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