Underwater particle vibration rate vibration pickup

Abstract

The invention provides an underwater particle vibration rate vibration pickup. The underwater particle vibration rate vibration pickup is characterized by comprising a vibration sensor, a shell, a suspension mounting piece, elastic materials, a base and a cable head. The shell is a sphere composed of a first polyurethane hemispheric shell body and a second polyurethane hemispheric shell body, the elastic materials are poured into the sphere, positioning holes are formed in the lower plane of the first polyurethane hemispheric shell body, the upper plane of the second polyurethane hemispheric shell body and the spherical face of the second polyurethane hemispheric shell body, the suspension mounting piece is fixedly arranged in the sphere through the positioning holes, the vibration sensor is fixedly arranged in the centre of the sphere, threaded holes are formed in the spherical face of the first polyurethane hemispheric shell body, the base is connected with the first polyurethane hemispheric shell body through the threaded holes, and the cable head is arranged on the base. The frequency band is wide, the vector information of the underwater acoustic field can be obtained within the range to 20 Hz to 20,000 Hz with the high quality, and the structural size can be adjusted according to the actual engineering needs.

Description

technical field [0001] The invention relates to an underwater acoustic signal receiver. Background technique [0002] Underwater receivers, commonly called hydrophones, can receive acoustic signals propagating in an underwater sound field. According to the received acoustic signal, it can be divided into sound pressure hydrophone and vector hydrophone. The sound pressure hydrophone can obtain the sound pressure signal transmitted in the underwater sound field; the vector hydrophone can obtain the sound pressure signal transmitted in the underwater sound field. Vector signals, including signals such as particle displacement, acceleration, velocity, and sound pressure gradient. [0003] Traditional vector hydrophones are divided into pressure difference type and co-vibration type according to different working mechanisms. The history of its research in the field of underwater acoustics at home and abroad has been decades, and there have been many successful applications. A c...

AI Technical Summary

Problems solved by technology

The differential pressure vector hydrophone itself has its inherent disadvantages and shortcomings: because its structural size is fixed, its measured frequency range is relatively narrow; at the same time, its sensitivity is relatively low

Although these designs have improved in structure, in order to satisfy its working mechanism, the density of its overall structure must be controlled to be the same as that of water, and the hydrophone itself must meet the acoustic rigidity conditions, otherwise it will affect the accuracy of its measurement signal. The accuracy of the amplitude and phase will affect the

Images