Dual-frequency ultra-high-resolution bathymetric side-scan sonar system

Abstract

The invention provides a dual-frequency ultra-high-resolution sounding side-scan sonar system, which relates to the field of sonar technology and can realize dual-band operation of the sounding side-scan, which not only satisfies wide-coverage scanning tasks, but also satisfies ultra-high resolution Recognition requirements; the system includes: a dual-frequency sonar transducer array, which is used to transmit sonar signals with preset frequencies and receive echo signals; sonar electronic extensions, which generate broadband chirp signals meeting the Ping rate requirements, and transmit Convert and transmit signals to the dual-frequency sonar transducer array, and process the echo signal received by the dual-frequency sonar transducer array; the control module is used to control the work of the sonar electronic extension; the sensor is used to monitor the carrier Environmental data and provide clock signals for the sonar electronic extension; the dual-frequency sonar transducer array adopts multi-subarray broadband transducer arrays, and the data of different sub-arrays are selected for processing and calculation according to the needs during sounding and side-scanning signal processing . The technical scheme provided by the invention is applicable to the process of underwater measurement.

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

Images