Device and method for measuring sound scattering intensity of marine pipeline in shallow sea

Abstract

The invention provides a device and method for measuring sound scattering intensity of a marine pipeline in shallow sea, and the device comprises a transmitting transducer, a cylindrical frame, a first hydrophone, a special-shaped support, and a second hydrophone, the transmitting transducer is located at the center of the cylindrical frame, the first hydrophone is located at the outer side of the cylindrical frame, the special-shaped support is placed on the surface of the marine pipeline, the second hydrophone is placed on the outer side of the special-shaped bracket; the invention also discloses a device and a method for measuring the sound scattering intensity of the marine pipeline in the shallow sea. According to the device and the method for measuring the sound scattering intensity of the marine pipeline in the shallow sea, the influence of reverberation from the sea surface and the sea bottom in sound scattering signals of the marine pipeline is reduced, low-frequency interference caused by large vortex pulsation of ocean current is weakened, and the device and the method are suitable for measuring the sound scattering intensity of the marine pipeline in ocean current environments such as the shallow sea, the problems of sound beam focusing and alignment of the directional transducer are avoided, and the method has a good engineering application prospect.

Description

technical field [0001] The invention relates to a device and method for measuring the sound scattering intensity of ocean pipelines in shallow seas, belonging to the field of acoustic measurement. Background technique [0002] In the past, the research on marine pipelines mostly focused on the state of wax deposition and corrosion resistance, and paid little attention to the acoustic characteristics of marine pipelines. Underwater vehicles often come close to the ocean pipeline to detect the surface state of the pipeline and its demand for acoustic detection requires an accurate understanding of the acoustic scattering characteristics of the ocean pipeline. The ocean pipeline is a multi-layer composite structure, the structural parameters of each layer are not uniform, and there is an anisotropic state, so there is a big difference between the acoustic scattering intensity of the ocean pipeline calculated by the theoretical method and the experimental measurement results . ...

AI Technical Summary

Problems solved by technology

[0003]First, the outer diameter of the ocean pipeline is small, generally 230mm, and it is wrapped with multi-layer rubber structure, so the scattering signal is weak, that is, the signal-to-noise ratio is very low Low, if the measuring hydrophone is placed at a long distance, the acoustic scattering signal of the ocean pipeline cannot be measured;

[0004]Second, the acoustic scattering intensity of marine pipelines in shallow seas is easily affected by the reverberation of the seabed and sea surface. If the processing method is not appropriate, the measured acoustic scattering intensity of marine pipelines will Too big;

[0005]Third, under the action of ocean currents, the hydrophone attached to the surface of the ocean pipeline will be blocked and backed by the ocean pipeline during the process of receiving acoustic signals. The lining effect makes the scattering signal weaker, resulting in a smaller sound scattering intensity;

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