Method for obtaining sonar operating distance index in practical use environment

Abstract

The invention relates to a method for obtaining a sonar operating distance index in a practical use environment. The method comprises the steps of calculating acoustic condition parameters such as sea area sound velocity, sea depth and sea bottom, the depth of an objective sound source and the depth of a sonar array by a sound field propagation model, wherein the acoustic condition parameters such as the sea area sound velocity, the sea depth and the sea bottom, the depth of the objective sound source and the depth of the sonar array are described in an original sonar operating distance index condition, obtaining an acoustic propagation attenuation curve TL0 under the original index condition, bringing a sonar operating distance index value R0 into the acoustic propagation attenuation curve TL0, correspondingly obtaining a high-quality factor FOM0 under the index condition, calculating a difference value between a practically measured objective radiation noise lever SL1 and an objective radiation noise level SL0 described in the original index, and a difference value between a practically measured background noise level NL1 and a background noise level NL0 described in the original index, obtaining a sonar high-quality factor FOM1 under a practical use condition, wherein the FOM1 is the sum of FOM0, delta SL and delta NL, bringing the sonar high-quality factor FOM1 into an acoustic propagation attenuation curve TL1 in the practical environment, and correspondingly obtaining a sonar operating distance index value R1 under the practical use condition.

Description

technical field [0001] The invention relates to a calculation method for a sonar action distance index, which belongs to the fields of underwater acoustic engineering, marine engineering, sonar technology, etc., and in particular relates to a method for obtaining a sonar action distance index in an actual use environment. Background technique [0002] The sonar range is an important indicator to measure the performance of sonar equipment, especially for the detection sonar installed on submarines, surface ships and anti-submarine aircraft, the sonar range directly reflects the underwater detection capability of sonar equipment At the same time, it will also affect the sonar's detection accuracy, azimuth resolution and other indicators. The sonar range not only depends on the sonar equipment’s array size, signal processing capability and other technical conditions, but also is closely related to the actual working ocean hydrological conditions, seabed and installation platfor...

AI Technical Summary

Problems solved by technology

[0021] However, at present, when the sonar equipment is finalized and accepted at sea or the sonar detection range is evaluated in specific sea areas and other conditions, although the sonar range index is already known, due to the actual environmental conditions of the sonar and the The environmental conditions described by the original sonar indicators are inconsistent, so the original sonar range indicators cannot be used directly, and the sonar range indicators under the existing conditions must be recalculated

Since the uncertain error caused by sonar detection and sound field propagation considered in the determination of the original index is difficult to be accurate, there is an urgent need for a method to evaluate and calculate the sonar range index in the actual use environment

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