Co-vibrating vector hydrophone

Abstract

The invention relates to a non-contact diamagnetic suspension-mounted vector hydrophone. The vector hydrophone comprises two permanent magnets, an acceleration sensor, an output cable and a graphite spherical shell. The vector hydrophone is characterized in that the magnetic poles of the two permanent magnets are uniform in direction; the two permanent magnets are mounted on the upper and lower ends of the acceleration sensor in the sensitive axis direction, and suspend in the graphite spherical shell filled with a paramagnetic metal ion solution; the graphite spherical shell is wrapped with a polyurethane acoustically transparent layer; and the output cable of the acceleration sensor is led out from the graphite spherical shell. The co-vibrating vector hydrophone provided by the invention has attitude self-correction function so as to obviate the need of a compass for locating the vector hydrophone; the vector hydrophone can suspend freely and stably by use of the coercive force between the permanent magnets and the graphite spherical shell, and the non-contact suspension can obviate the influences on the vector hydrophone caused by using an elastic suspension element, thereby realizing simpler and more convenient engineering application of the vector hydrophone.

Description

technical field [0001] The invention relates to a non-contact antimagnetic suspension installation vector hydrophone. Background technique [0002] As a new type of underwater acoustic receiver, the vector hydrophone can obtain vector signals in the underwater sound field, including signals such as particle displacement, velocity, acceleration, and sound pressure gradient. Together with the sound pressure hydrophone, it forms a composite vector hydrophone, which can simultaneously obtain the scalar information and vector information of the underwater sound field (that is, include amplitude information and phase information). The product of sound pressure and particle velocity is the sound energy flow density (sound intensity) at the measurement point of the sound field. It is a vector, which can not only reflect the amount of energy carried by the sound wave in water, but also reflect the direction "trajectory" of the sound wave energy flow when it is transmitted. , can als...

AI Technical Summary

Problems solved by technology

Nevertheless, this invention patent has the following disadvantages: the antimagnetic force between the permanent magnet and metal bismuth is small, and the installation method is difficult to ensure the symmetry of the antimagnetic force; the operating frequency range of the vector hydrophone is narrow, only limited to very low frequencies; Using a cylindrical end face as the receiving face, this method is only available in a very narrow frequency band

Although this can directly improve the accuracy of the underwater target azimuth measurement, it also increases the complexity of the system and increases the workload of the measurement.

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