Double-frequency ultrahigh-resolution depth-sounding side-scan sonar system

Abstract

The invention provides a double-frequency ultrahigh-resolution depth-sounding side-scan sonar system, which relates to the technical field of sonar, can realize depth-sounding side-scan double-frequency-band work, and not only meets a wide-coverage scanning task, but also meets an ultrahigh-resolution identification requirement. The system comprises a double-frequency sonar transducer array used for transmitting a sonar signal with a preset frequency and receiving an echo signal; a sonar electronic extension which generates broadband linear frequency modulation signals meeting the Ping rate requirement, transmits the broadband linear frequency modulation signals to the double-frequency sonar transducer array for signal conversion and emission, and processes echo signals received by the double-frequency sonar transducer array; a control module used for controlling the sonar electronic extension set to work; and a sensor used for monitoring carrier environment data and providing a clock signal for the sonar electronic extension set. The double-frequency sonar transducer array adopts a multi-subarray broadband transducer array, and data of different subarrays are selected for processing and calculation according to needs during depth measurement and side scanning signal processing. The technical scheme provided by the invention is suitable for the underwater measurement process.

Description

technical field [0001] The invention relates to the technical field of sonar, in particular to a dual-frequency ultra-high resolution sounding side-scan sonar system. Background technique [0002] In recent years, with the development of the global economy, human consumption of resources has been increasing, and the original land resources can no longer meet the needs of human economic and social development. Therefore, countries have turned their attention to the vast ocean, and the development and exploration of marine resources has become a reality. It has become the goal pursued by all countries. [0003] Our country also puts ocean exploration in an extremely important position. Since acoustic signals are the only form of energy that can travel long distances in the ocean, active detection sonar is usually used for ocean detection. One of the more common sonars is called side-scan acoustics. Early side-scan sonar usually used a single receiving array element, which onl...

AI Technical Summary

Problems solved by technology

Among them, the side-scan sonar is mainly developed in the direction of dual-frequency and multi-frequency, and generally has a high operating frequency (≥400KHz), which can provide high-resolution side-scan data, but generally does not provide sounding functions, and cannot obtain three-dimensional topographic data of the seabed ; Depth-scanning side-scan sonar generally works in single-frequency mode (≤500KHz), which can provide higher-resolution side-scan data and higher-precision bathymetric data, but the resolution of side-scan data provided is slightly worse than that of dual-frequency side scan sonar

[0005] At present, there is no depth-scanning side-scan sonar product that satisfies both ultra-high side-scan resolution and high sounding accuracy

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