Low-noise vector hydrophone

Abstract

The invention provides a low-noise vector hydrophone. The low-noise vector hydrophone comprises an underwater sensitive probe (1), a lead wire (3), a sealing housing (4), an installation pedestal (6), a conditioning chamber (7), a conditioning circuit (8) and a cable (9), wherein the underwater sensitive probe (1) is connected with the sealing housing (4) through an internal vibration damping structure (2), a first sealing ring (5) is arranged between the sealing housing (4) and the installation pedestal (6), the conditioning circuit (8) is installed in the conditioning chamber (7), a second sealing ring is arranged between the conditioning chamber (7) and the installation pedestal (6), and signals subjected to amplification filtering conditioning through the conditioning circuit are transmitted via the cable (9). According to the invention, self-noise from the inside of the vector hydrophone is effectively reduced, the capability of resisting interference from external vibration and electricity, electromagnetism and sound is improved, the equivalent self-noise acceleration spectrum level is of the low-noise vector hydrophone is enabled to reach lowest level, and the pick-up demand of underwater sound field weak signals can be satisfied.

Description

technical field [0001] The invention relates to a vector hydrophone, in particular to a low-noise vector hydrophone. Background technique [0002] In recent years, with the reduction of the radiation noise of underwater targets, some even below the zero-order sea state, the long-range detection of targets has become more difficult. Although a certain signal-to-noise ratio can be obtained by means of weak signal processing, the signal submerged in the marine environment can be detected, but if the self-noise of the hydrophone is higher than the magnitude of the received signal, the signal will be completely submerged in the device in the noise. As of now, there is no reliable way to detect a signal under this condition. Therefore, the self-noise of the hydrophone is particularly important for the sonar system, and it is a key indicator to determine the performance of the sonar system. [0003] For sound pressure hydrophones, as early as 1962, American R.S.Woollett analyzed...

AI Technical Summary

Problems solved by technology

However, in terms of low-noise design and production of vector hydrophones, no corresponding content has been found after consulting domestic and foreign literature, and there have been no reports on low-noise vector hydrophones.

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