Three-dimensional sonar imaging system based on graph processor and three-dimensional image method thereof

Abstract

The invention discloses a three-dimensional sonar imaging system based on a graph processor and a three-dimensional image method thereof. The three-dimensional sonar imaging system comprises a signal down-sampling module and the like which are sequentially connected. The signal down-sampling module is used for transferring an underwater acoustic signal received by an underwater acoustic sensor from high frequency to low frequency and converting the underwater acoustic signal into a digital signal convenient to process by a computer. A high-speed buffer module is used for storing multi-channel sampling data received from the signal down-sampling module. A parallel beam forming module based on an image processor reads multi-channel echo data from the high-speed buffer module. A wideband pulse compression module based on the image processor processes frequency domain signals output by the parallel beam forming module in different spatial angle directions. A three-dimensional display module receives output information of a beam forming module based on the image processor and output information of the wideband pulse compression module based on the image processor. The system and the method have the advantages of being low in cost, high in performance, strong in expansibility and the like.

Description

technical field [0001] The invention belongs to the field of underwater acoustic detection, and in particular relates to a three-dimensional sonar imaging system based on a graphics processor (Graphics Processing Unit, GPU) and a three-dimensional imaging method thereof. Background technique [0002] Sonar is a device that uses underwater sound waves to detect and locate targets. At present, the main functions of general sonar systems are the detection of underwater targets and the two-dimensional positioning of targets in azimuth and distance. With the development of marine development and military application requirements, such as for offshore engineering implementation, submarine pipeline detection, frogman detection, underwater vehicle navigation, etc., the requirement for three-dimensional positioning of underwater targets was put forward, and three-dimensional sonar was born. . [0003] Three-dimensional sonar generally uses a two-dimensional array to receive sound w...

AI Technical Summary

Problems solved by technology

[0004] The existing 3D sonar imaging device is realized by multi-chip FPGA (Field-Programmable Gate Array, that is, Field Programmable Gate Array), the hardware structure is complicated, and the development is difficult and expensive

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