Underwater sub-wavelength resolution ratio three-dimensional imaging method

Abstract

The invention discloses an underwater sub-wavelength resolution ratio three-dimensional imaging method. The underwater sub-wavelength resolution ratio three-dimensional imaging method includes the following steps: (1) a sound signal is emitted; (2) acoustic lens wave beams are formed; (3) the sound signal is received and adjusted; (4) an image is processed and displayed. A two dimensional datum is obtained according to an imaging rule of an acoustic lens, a distance datum is obtained by utilizing an emission time and a receiving time, and a three dimensional underwater sound datum is obtained by combining with an electric signal received by a underwater sound sensor. The three dimensional underwater sound image datum undergoes image enhancement and image segmentation and a three dimensional image of a target is achieved by use of an open-sourcing visualization program library visualization toolkit (VTK). A reflected sound wave is focused through the acoustic lens and forms the wave beam. Hardware circuits of a normal imaging system are greatly reduced. A sub-wavelength image is achieved due to the characteristic of negative refraction of a phonon crystal. The novel underwater sound sensor with a mesoscopic pressure resistance is utilized, the underwater sound sensor responds to an underwater sound signal well, and a faint underwater signal can be effectively transformed.

Description

technical field [0001] The invention discloses an underwater three-dimensional acoustic imaging method, which belongs to the research field of underwater acoustic imaging systems, and in particular discloses a three-dimensional imaging method for underwater targets. Background technique [0002] In recent years, the research on underwater acoustic imaging system, especially the research on real-time three-dimensional underwater acoustic imaging system has attracted extensive attention from governments, institutions and scholars in various countries. In my country, due to the needs of marine resources development, environmental monitoring, and military defense, the research on three-dimensional acoustic imaging and underwater acoustic image processing technology has been paid more and more attention. [0003] Underwater acoustic imaging systems perform imaging by processing backscattered echoes from objects on the seafloor or in water. During the imaging process, two-dimensi...

AI Technical Summary

Problems solved by technology

However, the above-mentioned devices are usually mechanical devices with low flexibility, high power consumption and the need to use more digital or analog devices. High-speed sampling and signal processing circuits are required to form beams when working, and the volume is relatively large. Application High cost, relatively few practical applications, and great limitations in all aspects

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