Towed array calibration device and calibration method thereof

Abstract

The invention provides a towed array formation calibration device and a calibration method. The towed array formation calibration device comprises an inverted-T transmission array, a receiver and a formation calibration computing unit, wherein the inverted-T transmission array is mounted on a carrier platform or a towed platform, which comprises two horizontal transmission energy exchangers and a depth detection transmission energy exchanger; the depth detection transmission energy exchanger is arranged on the perpendicular bisector of the connecting line between the two horizontal transmission energy exchangers; the three transmission energy exchangers are used to transmit test signals orthogonal to each other; the receiver is arranged in multiple positions in the towed array for receiving the orthogonal test signals at each position and transmitting the signals to the formation calibration computing unit; and the formation calibration computing unit calculates the relative positions among the receivers, to obtain the formation of the towed array. The invention further provides a relative calibration method. The invention has the advantages that the towed array formation calibration device and the calibration method overcome the effect of on-array calibrator the size of towed-array and confirm the time delay accuracy of calibration.

Description

technical field [0001] The invention belongs to the field of array signal processing, and in particular, the invention particularly relates to a device and method for array calibration of a towed array. Background technique [0002] In the field of sonar, towed array sonar is a very important detection sonar system. Since the towed array sonar is far away from the towed platform, it is less affected by the noise of the own ship, so it is the main sonar equipment for long-range target detection. However, since the towed array is generally flexible, its formation is greatly affected by water flow and drag. At present, some foreign related equipment (such as ATLAS towed line array) is connected to the line array through underwater tow fish, so as to reduce the influence of the underwater environment on the towed array. This approach does reduce the formation distortion of the towed array to a certain extent. However, since the actual formation of the towed array cannot achiev...

AI Technical Summary

Problems solved by technology

However, at present, the special formation calibration equipment and methods for towed arrays are on-array calibrators. This type of on-array calibrator needs to install the launching device on the array, resulting in an increase in the diameter of the towed array (generally the diameter is the original towed array 2 to 3 times that of the array), which causes considerable difficulties for the retraction and deployment of the drag array and the realization of the project, which is not conducive to practical application

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