Underwater high-resolution side-looking acoustic imaging system and method thereof

Abstract

The invention provides an underwater high-resolution side-looking acoustic imaging system. The system comprises a transmitting array, a receiving array and a receiver, wherein the receiver comprises a signal conditioning and acquisition functional module, a data transmission module and a data processing module, the signal conditioning and acquisition functional module is used for filtering and amplifying underwater acoustic signals and converting analog signals into digital signals, the data processing module also comprises a memory module, an image reconstruction module, a movement error estimation and compensation processing module and an image display module. The system is characterized in that: the transmitting array is a transmitting array group which consists of two transmitting arrays, and is used for transmitting acoustic signals with different frequency bands, and each transmitting array is driven by a transmitter. The invention also puts forward a method for utilizing the transmitting array group to carry out underwater high-resolution side-looking acoustic imaging. The invention has the advantages that: the limitation of the length of a plurality of sub-arrays of a sonar array on the moving speed is reduced, and thereby the surveying efficiency of the imaging system is increased.

Description

technical field [0001] The invention relates to the field of underwater acoustic imaging, in particular to an underwater high-resolution side-view acoustic imaging system and method. Background technique [0002] Since the propagation loss of sound waves in water is much smaller than that of light and electromagnetic waves, the use of sound waves is the main means of underwater environment detection. Resolution is an important assessment index for underwater acoustic imaging equipment. For traditional side-scan sonars, the range resolution can be obtained by using broadband signals, while the azimuth resolution is related to factors such as the length of the acoustic transducer array, the frequency of the acoustic signal, and the target distance. The longer the length of the acoustic transducer, the higher the azimuth resolution; the farther the imaging target is, the lower the azimuth resolution; the higher the frequency of the acoustic signal used, the higher the azimuth ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, such as the limitation of the moving speed of the sonar array by the length of multiple sub-arrays, and the low mapping efficiency of the imaging system, the present invention provides an underwater high-resolution side-view Acoustic imaging system and method

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