1-3Piezoelectric Composites Vector Hydrophone

The21st century is the century of ocean, the ocean not only contain rich naturalresources, but also has important strategic position. At present, many countries are increasingexploration of ocean dynamics, as an indispensable part of ocean detection system,hydrophone research is of great significance.Vector hydrophone is a new type of hydrophone, it can not only measure the acousticpressure information in the sound field, also can measure the vector information (particlevibration velocity). At present, the vector hydrophone using PZT ceramic materials as asensitive element, and with the deepening of the research of composite materials,1-3typepiezoelectric composite materials are applied to the hydrophone.This article first analyzes the factors affecting receive pressure sensitivity of the vectorhydrophone, and the theory basis for making a diameter of φ170mm vector hydrophone, itsworking frequency band is20Hz-1000Hz, its internal is four accelerometer with differentsensitive element and different mass. Through the test found that: compared with the PZTceramic materials,1-3piezoelectric composite is more suitable for the production of vectorhydrophone. At the same time, use high density block can significantly improve the receivingperformance of hydrophone.