Article Contents

Chinese Optics> 2023> Accepted Manuscript

ZONG Si-guang, YANG Shao-peng, ZHANG Xin, PENG Dan, DUAN Zi-ke, CHEN Bao. Simulation and experiment of weak multi-target laser detection in complex hydrology[J]. Chinese Optics. doi: 10.37188/CO.2023-0141

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Simulation and experiment of weak multi-target laser detection in complex hydrology

doi:10.37188/CO.2023-0141

1.
College of Electronic Engineering, Naval University of Engineering, Wuhan 430034, China
2.
Qingdao Branch, Naval Aeronautical University, Qingdao 266041, China

Funds:Supported by The National Defense Foundation of China (No. 2019-JCJQ-JJ-056)

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Corresponding author:1714308601@qq.com
Available Online:05 Dec 2023

Abstract

Abstract

Objective
Investigating the impact of water quality, target characteristics, and target distance is crucial to assessing the effectiveness of laser detection for weak targets in complex coastal water bodies. This study examines the theoretical and practical significance of understanding these factors in underwater laser detection.

Method
In this study, we establish a laser detection model for detecting weak underwater targets. To verify the detection of weak multi-target laser ranging under different turbidity, we use Monte Carlo simulation. We simulate laser backscattering echo signals of small targets at different distances and analyze the backscattering echo characteristics of multiple targets with various reflection coefficients. Additionally, a smart and portable laser detection system for detecting weak underwater targets has been designed and developed. Laboratory and field lake environment tests were conducted to detect and range multi-target.

Result
In a near-shore lake with a turbidity of 12.87 NTU, the system can effectively detect 3−4 mixed small target groups. These groups have different low reflection coefficients and diameters varying from 80 to 400 μm, all within a range of 10 meters. The average measurement error is ±0.11 m, which is consistent with the theoretical simulation.

Conclusion
The research results serve as a guide for computing links, designing systems, and optimizing parameters for detecting multi-weak underwater targets using blue and green lasers. Furthermore, the results assist in the engineering practice of detecting underwater obstacles in offshore turbid waters.
- laser detection and ranging,
- weak multi-objective,
- complex waters,
- Monte Carlo

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References (25)

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