The Study Of Three-Dimensional Vector Hydrophone And Array Technology

The pressure and particle velocity could be measured vector hydrophone at the same location and the same time in underwater sound field, then, the message of sound field could be described briefly. The vector hydrophone of resonant-column type was widely used in underwater acoustic projects in virtue of its strong-points, such as the high sensitivity, the smooth response in the frequency band of interest, the fine symmetry in direction performance, and the high resolution.In the thesis, a kind of 3-D cylindrical vector hydrophone was designed for the project's requirements. The vector hydrophone was combined with pressure channels and vector channels. The theory of acoustic reception under the case of rigid cylinder and elastic cylinder was researched in this thesis. The hanging model of column receptor was founded and researched via experimentation. Thepressure channels and vector channels of the designed vector hydrophone wasresearched via simulation by using ANSYS. The 3-D vector hydrophone designedbased on the result of simulation with the sizeφ44×84 (mm), and the essentially flat response between 5-8kHz.The vector hydrophone has high sensitivities, be convenience in hanging and smaller volume. Its performance was measured both in standing wave pipe and anechoic lab. The result of experimentation indicated: The pressure sensitivity of vector channels was -184dB (measure frequency: 1000Hz,0dB re 1V/μPa) with direction performance of cosine, and the pressure sensitivity of pressure channels was -198dB (0dB re 1V/μPa).The line array was composed with 8 vector hydrophones based on the design of the thesis. At last, the experimentation was put up successfully on the lake.