Laser forward and backward scattering characteristics and experimental study of bubbles in ship wake

Zong, Siguang; Chen, Bao; Zhang, Xin; Duan, Zike; Yang, Shaopeng; Xionghui, Li

doi:10.1364/ao.512295

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…The laser transmission distance of 532 nm is set to be far, and the water scattering is smaller than other wavelengths. Setting the water attenuation coefficient to 0.151 m −1 can approximately simulate the offshore seawater quality [23].…”

Section: Simulation Of Laser Backscattering Detection Of Ship's Wakementioning

confidence: 99%

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Zong,

Zhang,

Duan

et al. 2024

Applied Sciences

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Addressing the issues of weak echo signals and strong background interference in the laser detection of ships’ wakes, an analysis of the laser backscatter detection characteristics of ships’ wakes has been conducted. Based on the Monte Carlo method, a simulation model for the dual-mode fusion detection of ship wake bubbles using laser technology was constructed under different target characteristics. A dual-mode fusion detection system for ships’ wakes was designed, and an indoor experimental platform for the dual-mode fusion detection of ship wake bubbles using laser technology was established. To address problems such as a wide range of echo signal intensity changes, severe signal fluctuations, low resolution, poor image contrast, and blurred target edge information, an algorithm based on multi-timescale hierarchical fusion signal processing and temporal difference accumulation image processing was proposed. Verification experiments for ship wake detection were conducted, which revealed that the dual-mode fusion detection method for ship wake bubbles using laser technology can effectively enhance the detection signal-to-background ratio and counter the maneuvering evasion of underwater weapons by ships. It achieved high sensitivity, large dynamic range, high resolution, and a wide field of view detection and real-time signal processing of ship wake bubble targets of different magnitudes against a strong reverberation background. The effectiveness of the dual-mode fusion detection mode was validated, providing theoretical support for the overall system design and parameter settings.

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Section: Simulation Of Laser Backscattering Detection Of Ship's Wakementioning

confidence: 99%

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Zong,

Zhang,

Duan

et al. 2024

Applied Sciences

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Laser detection of ship bubble wakes based on multi-timescale classification

Siguang,

Bao,

Zike

et al. 2024

Ocean Engineering

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Method for Detecting Underwater Microbubbles Using Dual-Mode Fusion of Laser Polarization

Zong,

Yang,

Liang

2024

Applied Sciences

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Bubble detection in water plays important roles in human exploration and management of the ocean. This research presents a detection technique based on laser polarization dual-mode fusion, aiming at solving the difficulties of light scattering intensity characteristics that are hard to extract and the small particle size of underwater bubbles that are hard to detect. To increase the precision of bubble identification, an image fusion technique based on bubble polarization degree is first presented. Second, we quantitatively investigate the grayscale undulation of bubbles with different size and number distributions in the image from both statistical and experimental aspects, introduce image grayscale fluctuation (GF) to fuse two modes of laser polarization and the image, establish an a posteriori distribution probability model of discriminating features such as the size and number of bubbles, and realize the bubble small-sample, multi-source data fitting. The findings demonstrate that dynamic bubble detection in the 50–1000 μm and 100–2000 cm−3 ranges can achieve more than 95%, as well as more than a 93%, accuracy in quantity distribution and bubble size change. This technique achieves the continuous perception of bubble features in complicated underwater environments, and offers a possible application scheme for the detection of marine bubble environments.

show abstract

Laser forward and backward scattering characteristics and experimental study of bubbles in ship wake

Cited by 3 publications

References 24 publications

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Laser detection of ship bubble wakes based on multi-timescale classification

Method for Detecting Underwater Microbubbles Using Dual-Mode Fusion of Laser Polarization

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