Device and method for calibrating lineup of dragging linear array

Abstract

The invention discloses a device for calibrating the lineup of a dragging linear array. The hardware of the device mainly comprises a calibration sound source, a receiving hydrophone array, a signal acquisition transmission module array and a data processing module. The lineup calibration process mainly comprises the following steps: (1) calibrating a sound source to transmit a calibrated submarine sound signal in a system synchronous clock; (2) according to the system synchronous clock, enabling the signal acquisition transmission module array to start work while the sound signal is transmitted, that is, a timer starts timing and hydrophones acquires data; (3) recording the timing time of the timer while the signal acquisition transmission module array acquires the transmitted calibrated submarine sound signal, and transmitting the timing time to the data processing module; (4) estimating the distances between the hydrophones and the calibrated sound source according to the timing time; (5) estimating the coordinates of hydrophones through the data processing unit according to the estimation results in combination with depth sensor data, thereby realizing lineup calibration. By adopting the device and the method, position calibration of array elements of a dragging array can be conveniently achieved.

Description

technical field [0001] The invention relates to a towed linear array calibration device and method, belonging to the technical field of underwater acoustics. technical background [0002] The towed line array is not restricted by the space of the hull and the towed body. The number of hydrophones is large, the length of the sound array is long, and the aperture is large. It can accept low-frequency and even very low-frequency sound waves. Deep sonar has been widely used in military and non-military applications. But there are some inherent drawbacks in its application. For example, the acoustic section of the towed line array is flexible, and when it is towed underwater, it is easily affected by the maneuvering of the ship and ocean currents, causing formation distortion, resulting in a decrease in detection performance, or even failure to work. [0003] Some literature proposes that the plane wave signal received by the towed linear array can be used for formation measure...

AI Technical Summary

Problems solved by technology

If the acoustic section of the towed line array is flexible, it is easily affected by the maneuvering of the ship and ocean currents when it is towed underwater, causing formation distortion, resulting in a decrease in detection performance, or even failure to work

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