A fiber optic vector hydrophone with attitude self-correction function

Abstract

The invention belongs to the technical field of optical fiber sensing, and in particular relates to a fiber optic vector hydrophone with a posture self-correcting function. The vector hydrophone is special for a towed sonar array, and can realize the posture self-correcting in a roll direction of the vector hydrophone, so as to reach the aim that all vector hydrophone element postures in the array are automatically kept consistent. The invention specifically designs a suspension support system with a bias center of gravity, the system is fixedly connected with the vector hydrophone and can freely rotate. According to a principle of dynamics, the vector hydrophone can automatically keep a state of lowest center of gravity, so as to ensure that all elements of the array are kept in the same posture. The fiber optic vector hydrophone provided by the invention is applicable to the control on the posture of a towed vector array vector hydrophone, and also applicable to the control on the posture of a towed array posture sensor, and can ensure that the posture sensor in the towed array is kept in a horizontal state all the time, so as to improve the measuring accuracy of the posture sensor.

Description

Technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an optical fiber vector hydrophone with posture self-correction function. The optical fiber vector hydrophone is specially designed for towing sonar arrays. The posture of the hydrophone is automatically corrected by the eccentricity of the inner suspension frame that can rotate freely in the outer support frame, so that the sensor axis direction of each hydrophone element in the array is maintained Consistent. Background technique [0002] The vector hydrophone is an important sensor in the field of underwater acoustic detection. A single element can obtain the vector information of the movement of the medium particle, so it can accurately measure the propagation direction of the sound pressure signal. Especially in the application direction of towed hydrophone sonar array, compared with scalar hydrophone, it has the ability to distinguish the ambiguity of the port and...

AI Technical Summary

Problems solved by technology

[0004] In sonar systems with unlimited space such as submersible buoys and buoys, the vector hydrophone can be suspended symmetrically in a larger suspension frame by three pairs of elastic bodies orthogonal to each other, while using a large weight block and three-dimensional The free rotation mechanism keeps the vector hydrophone primitives in the same direction, but the disadvantage is that the vector hydrophone structure is very large

In the towed vector hydrophone array, in order to reduce the volume of the sonar, the outer diameter of the array must be controlled; at the same time, in order to ensure that the vector hydrophone is suspended in the liquid medium and improve the sensitivity, the outer diameter of the vector hydrophone should be larger The bigger the better, so in a limited space, the attitude self-correcting device composed of a three-dimensional suspension frame, a large weight block and a three-dimensional free rotation device is difficult to meet the requirements of the towed array application

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