A semi-analytical Monte Carlo simulation method for marine fluorescence detection

Abstract

The invention provides a semi-analytic Monte Carlo simulation method for marine fluorescence detection. The method is based on the vertical density distribution of fluorescent substances, and uses the Monte Carlo method to generate a fluorescent substance light source to simulate the transmission of fluorescent photons in seawater random media. The model considerations Scattering and absorption characteristics of seawater and suspended matter in water; combined with semi-analytical methods, quickly calculate the energy induced by the water detector during each scattering process, count the optical path of each photon and form a time-domain detection signal. The invention can be used to analyze the water color information of different water bodies, and also helps to carry out research on ocean optical scattering characteristics, saving a lot of cost, thereby providing reference for remote sensing detection and anti-jamming algorithm design, parameter selection, and performance evaluation.

Description

technical field [0001] The invention relates to the field of research on light scattering characteristics of marine environment, in particular to a simulation technology of marine fluorescence transmission characteristics using a semi-analytic Monte Carlo method. Background technique [0002] In the field of ocean optics, the underwater fluorescence effect is closely related to the characteristics of dissolved substances in the ocean. The fluorescence spectral characteristics can be used to invert rich water quality information. It can be used for water mass tracing from different sources, biological activity tracing, and water quality pollution classification. play a vital role. Ocean fluorescence detection simulation technology can provide a theoretical basis for ocean water color remote sensing and underwater detection data analysis, feature extraction, target recognition and other research. [0003] For the transmission of photons in the medium, some international resea...

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Problems solved by technology

Although these software can simulate particle transport problems, they all have some shortcomings. MCML is mainly used to simulate the transmission of photons emitted by an external collimated light source in a multi-layer flat 3D medium. The light source model and medium model used are simple. Classic model; MCNP can be used to simulate the transmission of various particles, such as neutrons, photons, and electrons in 3D media, but MCNP does not have the function of directly simulating the transmission of particles with random light source parameters in 2D media; EGS4 simulates the transmission of electrons and photons in 3D media. A software development kit for transport in different media, but also lacks the function of directly simulating particle transport in 2D media

Although these photon transport characteristic simulation techniques are widely used in bio-optics and other fields, they cannot quickly and effectively simulate the transport process of large-scale ocean fluorescence.

[0004] In the retrieved domestic and foreign open and limited published literature, the probability of photons received by the detector in the traditional Monte Carlo method is low, and the result is difficult to converge. For the analytical method of the static diffusion equation, the analytical solution of complex shape media usually hard to find

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