Underwater acoustics and pressure combined ship detection device and detection method thereof

Abstract

The invention discloses an underwater acoustics and pressure combined ship detection device and a detection method thereof. The existing methods of ship detection mainly include video surveillance, active acoustic detection, passive acoustic detection, and AIS automatic identification system and synthetic aperture radar remote sensing detection. The underwater acoustics and pressure combined ship detection device comprises an integrated control unit and m detection devices. Each node information processing unit comprises a hydrophone, a second AD conversion module, a sound signal processing module, a first storage module, a first decoding module, a second encoding module, a second communication module, a pressure signal processing module, an equipment self-check module, a wave power generation module, a second battery, and a second power control module. Underwater sound is detected preliminarily through the hydrophones. When an abnormal signal is found, pressure sensors are activated to detect the surface wave and identify ship wave from the surface wave. The energy consumption for detection is reduced, and the service time is increased.

Description

technical field [0001] The invention belongs to the technical field of ship detection, and in particular relates to a ship detection device with underwater acoustics and pressure coordination and a detection method thereof. Background technique [0002] The existing ship detection methods mainly include video surveillance, active acoustic detection, passive acoustic detection, AIS automatic identification system and synthetic aperture radar remote sensing detection. [0003] Video surveillance uses cameras to shoot the monitored area, and uses methods such as manual monitoring or machine vision to determine whether there is a ship. The active acoustic detection method uses a sound wave generator to emit sound waves within a certain range, and receives and calculates the reflected sound waves to determine whether there is a target ship. The AIS automatic identification system is an automatic tracking system installed on ships. It exchanges electronic data with neighboring sh...

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Problems solved by technology

[0004] All of the above methods have some shortcomings. Video surveillance has high requirements on lighting and weather conditions; active acoustic detection needs to continuously emit sound waves to the detection area, and sound waves within a certain frequency range will cause damage to aquatic organisms; passive acoustic detection is less affected by environmental noise. Large, and the signal processing is relatively complex, and the detection accuracy is low; the AIS automatic identification system needs to actively install communication equipment on the ship, which is not suitable for detection purposes; the synthetic aperture radar remote sensing detection cost is high, and certain conditions are required for implementation

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