Vertical towed linear array with elliptical cross section

Abstract

The invention provides a vertical towed linear array with an elliptical cross section. The array overcomes the defect that vortex base vibration is easily caused by water flow cutting when a traditional linear array with a circular cross section is vertically towed and used, can effectively reduce vortex base vibration and water flow noise generated in the use process, and improves the signal-to-noise ratio. A high-voltage transmission + DC / DC secondary voltage stabilization module power supply system and a modular distributed acquisition and transmission design are adopted, the aperture expansion of the linear array is realized, and the expansion mode comprises expansion in the same linear array or connection expansion of a plurality of linear arrays through a watertight connector; and an inclination angle sensor, a depth sensor and a three-axis accelerometer are installed on the head portion and the tail portion in the linear array, the working posture of the linear array can be fitted in real time through data fed back by the sensors, and the optimal dragging speed is determined.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic detection, in particular to a vertical towed linear array with an elliptical cross section. Background technique [0002] Line arrays are mainly divided into two types: horizontal line arrays and vertical line arrays. The horizontal line array measures the acoustic signal of the horizontal aperture, including the towed line array used for towing and the shore base line array fixedly deployed on the bottom of the water; Another method for measuring acoustic signals through vertical apertures is the vertical line array. The focus of the two is also different, in which the horizontal array is mainly used to detect the azimuth information of the target, while the vertical array detects the depth information of the target. [0003] The existing vertical line arrays are basically used in a fixed-point vertical arrangement, that is, the line array is submerged to a certain depth by a heavy o...

AI Technical Summary

Problems solved by technology

[0005] The traditional line arrays are all circular cross-sections. When the circular cross-section line arrays cut the water flow, the water flow tends to form turbulent flow on the back flow surface and generate vortex vibration, which will not only drive the line array to vibrate, but also improve the flow of water. flow noise, thereby reducing the signal-to-noise ratio and increasing the difficulty of detecting the target signal, so the circular cross-section line array is not suitable for vertical towing

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