CN110927071B - Verification method for testing and simulating polarization transmission characteristics of sea fog environment under influence of illumination - Google Patents

Abstract

A verification method for testing and simulating the polarization transmission characteristics of a sea fog environment under the influence of illumination belongs to the field of polarization transmission detection. The invention aims at the complex marine environment of atmospheric-sea fog, uses a simplified double-layer structure of the atmosphere and sea fog to simulate the complex marine environment, and adopts Monte Carlo The Luohe RT3 program simulates the polarization transmission process of the sea fog environment and the polarization distribution of the descending radiation under the influence of sunlight. Experiment verification and simulation, improve the problem of changing sea fog environment and high cost of the test process when performing simulation verification outdoors, so that the accuracy of the experimental test results can be improved, and the accuracy can be verified by theory and experiment.

Description

Verification method of test and simulation of polarization transmission characteristics in sea fog environment under the influence of illumination

technical field

The invention belongs to the field of polarization transmission detection, and particularly relates to a verification method for testing and simulating polarization transmission characteristics of a sea fog environment under the influence of illumination.

Background technique

Fog is an aerosol system composed of slowly falling water droplets or ice crystal particles suspended in the near-surface air, and sea fog is an aerosol formed and maintained under specific marine environments and weather conditions. Due to the existence of the atmosphere-sea fog multi-layer medium environment, the unpolarized natural light has polarization characteristics after being scattered by atmospheric molecules and sea fog particles, which affects the active polarization detection in the vertical direction. Therefore, it is of great significance to study the active polarization characteristics of complex marine environments under the influence of illumination for the fields of transportation, sea surface detection, and ocean development.

At present, most of the research on the polarization transmission characteristics in the vertical direction stays in the research of the all-sky polarization mode in the atmospheric medium environment. The RT3 method based on the vector radiation transmission equation proposed by Evans K.F. et al. One of the most widely used methods, this method uses a multiply-accumulate method to solve the radiation and transmission properties between two layers based on an intuitive physical process, and then obtains the entire sky polarization distribution pattern. Zhang Ying et al. of Beihang University used this method to solve the Stokes parameter of the simplified double-layer atmospheric light wave, and simulated the polarization information of the whole sky in sunny, cloudy and cloudy conditions, respectively. Wang Hongxia et al. of Beijing Institute of Technology used the radiative transfer model based on the doubling-accumulating method to study the sky polarization model for various weather conditions from the visible light band to the near-infrared band. However, the above methods are limited to simulate the transmission of the atmospheric environment polarized in the vertical direction. Regarding the active laser emission situation, there is no report on the research on the polarization transmission characteristics of the vertical direction through the atmosphere and sea fog in the multi-layer marine environment, and when the simulation verification is carried out outdoors, the sea fog environment is changeable, and the vertical direction test requires airborne, Shipboard and other test guarantees make the cost of the test process too high and increase the difficulty of experimental verification.

Therefore, in order to study the active polarization transmission characteristics under the influence of vertical observation of sunlight in complex marine environments, a verification method for the test and simulation of polarization transmission characteristics in sea fog environment under the influence of illumination is urgently needed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to study the polarization transmission characteristics of the multi-layer sea fog environment in the vertical direction under the influence of sunlight, and to verify it jointly under the experimental test and computer simulation method, and to have high test accuracy, and propose a light influence Verification method for testing and simulation of polarization transmission characteristics under sea fog environment.

In order to achieve the above object, the present invention adopts the following technical scheme: a verification method for testing and simulating the polarization transmission characteristics of sea fog environment under the influence of illumination, it is characterized in that: the system adopted by the method comprises a multi-layer sea fog environment simulation system, a solar simulation system system, polarization transmitting system, polarization receiving system, sea fog particle generator, atmospheric aerosol generator, laser and optical power meter,

The multi-layer sea fog environment simulation system is a hemispherical closed structure, a second glass window is opened at the top center of the multi-layer sea fog environment simulation system, and a first glass window is opened at the bottom center position. There is a glass partition inside the system; the glass partition separates the multi-layer sea fog environment simulation system into two layers, the upper layer is the atmospheric environment simulation layer, and the lower layer is the sea fog environment simulation layer. Circular guide rails arranged coaxially; circular arc guide rails are installed on the circular ring guide rails to slide and cooperate with them; The arc of the upper layer is consistent;

The sun simulation system is placed on the arc-shaped guide rail, and is slidably matched with the arc-shaped guide rail;

The polarization emission system is placed above the second glass window of the multi-layer sea fog environment simulation system, and the polarization emission system is used to emit polarized light;

The polarization receiving system is placed under the first glass window of the multi-layer sea fog environment simulation system, and the polarization receiving system is used to measure the polarization state of the received polarized light and analyze the transmission characteristics of the polarized light;

The sea fog particle generator is connected with the sea fog environment simulation layer, and the sea fog particle generator is used to generate sea fog particles;

The atmospheric aerosol generator is communicated with the atmospheric environment simulation layer, and the atmospheric aerosol generator is used to generate atmospheric aerosol particles;

The laser and the optical power meter are arranged facing each other, and when used to obtain the optical thickness of the atmospheric environment simulation layer, the laser is placed above the second glass window of the multi-layer sea fog environment simulation system, and the optical power meter is placed on the lower surface of the glass partition; When obtaining the optical thickness of the sea fog environment simulation layer, the laser is placed on the upper surface of the glass compartment of the multi-layer sea fog environment simulation system, and the optical power meter is placed under the first glass window of the multi-layer sea fog environment simulation system;

The specific method includes the following steps:

Step 1. Place a laser above the second glass window of the multi-layer sea fog environment simulation system, place an optical power meter under the glass partition, start the laser and the optical power meter, and the optical power meter begins to record the intensity of the outgoing light; turn on the atmosphere The sol generator, the atmospheric aerosol generator, fills the atmospheric environment simulation layer of the multi-layer sea fog environment simulation system with atmospheric aerosol particles, and calculates the optical thickness of the atmospheric environment simulation layer from the light intensity values before and after filling the atmospheric aerosol particles, Until the required optical thickness is met, stop charging atmospheric aerosol particles, and record the charging time of atmospheric aerosol particles;

Step 2: Discharge the atmospheric aerosol particles charged in Step 1, place a laser on the upper surface of the glass compartment of the multi-layer sea fog environment simulation system, and place an optical power under the first glass window of the multi-layer sea fog environment simulation system. meter, turn on the laser and the optical power meter, and the optical power meter starts to record the intensity of the outgoing light; turn on the sea fog particle generator, and fill the sea fog particles into the sea fog environment simulation layer of the multi-layer sea fog environment simulation system. Calculate the optical thickness of the sea fog environment simulation layer with the light intensity values before and after, until the required optical thickness is met, stop filling the sea fog particles, and record the filling time of the sea fog particles;

Step 3: Discharge the sea fog particles charged in Step 2, and charge the atmospheric aerosol particles into the atmospheric environment simulation layer from the atmospheric aerosol generator according to the atmospheric aerosol charging time recorded in Step 1, and follow the steps 2. The sea fog particles are charged into the sea fog environment simulation layer by the sea fog particle generator;

Step 4, adjusting the polarization information in the polarization transmitting system, and recording the data measured in the polarization receiving system, and measuring the active polarization transmission characteristics without the influence of light, and the polarization information includes the wavelength and polarization state of the polarized light;

Step 5. According to the composition of the sea fog particles generated by the sea fog particle generator, find the parameters of refractive index and particle size, and calculate the wavelength of the polarized light emitted by the polarized emission system, the polarization state of the polarized light, the refractive index of the sea fog particles, and the sea fog particles. The optical thickness values measured in the trail and sea fog environment simulation layer are sequentially input into the Monte Carlo simulation program for computer simulation of the polarization degree value under the influence of no light environment;

Step 6: Discharge the atmospheric aerosol particles and sea fog particles charged in step 3, adjust the position of the solar simulation system relative to the horizontally placed circular guide rail and the vertically placed circular arc guide rail, and determine the sun altitude angle and The azimuth of the sun, re-fill the atmospheric aerosol particles in the atmospheric environment simulation layer according to the atmospheric aerosol filling time recorded in step 1, and refill the sea fog particle filling time in the sea fog environment simulation layer according to the filling time of sea fog particles recorded in step 2. Refill with sea fog particles;

Step 7: Keep the polarization information in the polarization transmitting system consistent with that in step 4, record the data measured in the polarization receiving system, and measure the transmission characteristics of active polarization under the influence of sunlight;

Step 8. Input the Legendre series parameters of polarized light wavelength, solar altitude angle, solar azimuth angle, solar flux of the solar simulation system, radiation intensity of the solar simulation system, atmospheric aerosol particles and sea fog particles into the In the RT3 program, the degree of polarization of the solar descending radiation at the position of the polarization receiving system under the influence of sunlight is simulated by computer;

Step 9: Compare the degree of polarization value of active polarization under the influence of no light measured in step 4 with the degree of polarization value of active polarization under the influence of computer simulation in step 5 without the influence of light, and verify the experimental test of active polarization when there is no influence of light. and the correctness of the simulation; then the polarization degree value measured in step 7 under the influence of sunlight, the polarization degree value of the sun's descending radiation at the position of the polarization receiving system simulated by the computer in step 8, and the computer-simulated no-illumination value in step 5 The polarization degree values of the active polarization under the influence of the environment are compared to verify the effect of sunlight on the transmission of active polarization.

Further, the sun simulation system is composed of a xenon lamp, which is placed on a circular arc-shaped guide rail, and the sun simulation system slides arbitrarily on the circular arc-shaped guide rail except for the position of the second glass window.

Through the above-mentioned design scheme, the present invention can bring the following beneficial effects: the present invention provides a verification method for testing and simulating the polarization transmission characteristics of sea fog environment under the influence of illumination. The double-layer structure simulates the complex marine environment, and the Monte Carlo and RT3 programs are used to simulate the polarization transmission process of the sea fog environment and the downward radiation polarization distribution under the influence of sunlight. The experimental verification and simulation of the active polarization transmission characteristics of the sea fog multi-layer marine environment improves the problem of the changeable sea fog environment and the high cost of the test process when the outdoor simulation verification is carried out. It is verified by theory and experiment.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

FIG. 1 is a schematic diagram of the system structure adopted in the verification method of the polarization transmission characteristic test and simulation of the sea fog environment under the influence of illumination according to the present invention.

Figure 2 is a structural diagram of the optical thickness test of the atmospheric environment simulation layer.

Figure 3 is a structural diagram of the optical thickness test of the sea fog environment simulation layer.

In the picture: 1-Multi-layer sea fog environment simulation system, 11-Sea fog environment simulation layer, 12-Atmospheric environment simulation layer, 13-Glass compartment, 14-Circular guide rail, 15-Arc guide rail, 16- 1st glass window, 17-2nd glass window, 2-sun simulation system, 3-polarization transmitting system, 4-polarization receiving system, 5-sea fog particle generator, 6-atmospheric aerosol generator, 7-laser, 8- Optical power meter.

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below with reference to the preferred embodiments and accompanying drawings. It should be understood by those skilled in the art. The content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention. Unless otherwise defined, technical or scientific terms used herein should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and the features defined with "first" and "second" do not indicate any order, quantity or importance. sex, but only to distinguish the different components.

The verification method for the test and simulation of the polarization transmission characteristics of the sea fog environment under the influence of light is shown in Figure 1, Figure 2 and Figure 3. The system used in this method includes a multi-layer sea fog environment simulation system 1, a solar simulation system 2, and a polarization emission system. 3. Polarization receiving system 4, sea fog particle generator 5, atmospheric aerosol generator 6, laser 7 and optical power meter 8,

The multi-layer sea fog environment simulation system 1 is a hemispherical closed structure with a radius of 2.4m. A second glass window 17 with a diameter of 50mm is opened at the top central position of the multi-layer sea fog environment simulation system 1. The second glass window 17. The light used for the polarized emission system 3 is incident on the multi-layer sea fog environment simulation system 1. A first glass window 16 with a diameter of 50mm is opened at the bottom center of the multi-layer sea fog environment simulation system 1. The first glass window 16 It is used for the polarization receiving system 4 to receive the light information emitted from the multi-layer sea fog environment simulation system 1. The multi-layer sea fog environment simulation system 1 is provided with a glass partition 13; It is divided into upper and lower layers. The upper layer is the atmospheric environment simulation layer 12 with a height of 1.6m, and the lower layer is the sea fog environment simulation layer 11 with a height of 0.8m. The upper surface edge of the glass partition layer 13 is fixed with a circular ring arranged coaxially with it. Circular guide rail 14; circular arc guide rail 15 is installed on the circular ring guide rail 14; the circular arc guide rail 15 is vertically arranged with the circular circular guide rail 14, and the circular arc guide rail 15 is connected to the multi-layer sea fog environment simulation system The upper arc of 1 is the same;

The solar simulation system 2 is composed of a xenon lamp with a power of 100W, and is placed on the arc-shaped guide rail 15. The solar simulation system 2 can slide arbitrarily on the arc-shaped guide rail 15 except for the second glass window 17 to simulate the sun. The altitude angle ranges from 20 degrees to 89.4 degrees, and from 90.4 degrees to 160 degrees; the arc-shaped guide rail 15 can slide arbitrarily on the circular ring guide rail 14 to simulate the azimuth angle of the sun from 0 to 360 degrees.

The polarized emission system 3 is placed above the second glass window 17 of the multi-layer sea fog environment simulation system 1, and the polarized emission system 3 is used to emit polarized light, and the polarized light is linearly polarized light and circularly polarized light; linearly polarized light can be Linearly polarized light in the visible light region with a wavelength of 450nm, 532nm or 671nm, or linearly polarized light in the near-infrared region with a wavelength of 808nm or 1064nm, but not limited to this; circularly polarized light with a wavelength of 450nm, 532nm or Circularly polarized light in the visible light region at 671 nm, or circularly polarized light in the near-infrared region with a wavelength of 808 nm or 1064 nm, but not limited to this;

The polarization receiving system 4 is placed under the first glass window 16 of the multi-layer sea fog environment simulation system 1, and the polarization receiving system 4 is used to measure the polarization state of the polarized light it receives, and to analyze the transmission characteristics of the polarized light;

The sea fog particle generator 5 is communicated with the sea fog environment simulation layer 11, and the sea fog particle generator 5 is used to generate sea fog particles;

The atmospheric aerosol generator 6 is communicated with the atmospheric environment simulation layer 12, and the atmospheric aerosol generator 6 is used to generate atmospheric aerosol particles;

The laser 7 and the optical power meter 8 are arranged facing each other, and when used to obtain the optical thickness of the atmospheric environment simulation layer 12, the laser 7 is placed above the second glass window 17 of the multi-layer sea fog environment simulation system 1, and the optical power meter 8 is placed at the top of the second glass window 17. The lower surface of the glass partition 13; when used to obtain the optical thickness of the sea fog environment simulation layer 11, the laser 7 is placed on the upper surface of the glass partition 13 of the multi-layer sea fog environment simulation system 1, and the optical power meter 8 is placed on the multi-layer sea fog. Below the first glass window 16 of the environment simulation system 1;

The equipment required for the verification method for the test and simulation of the polarization transmission characteristics of the sea fog environment under the influence of light also includes: a computer system with VC++ installed;

The specific method includes the following steps:

Step 1. Place the laser 7 above the second glass window 17 of the multi-layer sea fog environment simulation system 1, place the optical power meter 8 under the glass partition 13, start the laser 7 and the optical power meter 8, and start the optical power meter 8 Record the intensity of the outgoing light; turn on the atmospheric aerosol generator 6, and the atmospheric aerosol generator 6 fills the atmospheric environment simulation layer 12 of the multi-layer sea fog environment simulation system 1 with atmospheric aerosol particles. The light intensity value of the atmospheric environment simulation layer 12 optical thickness τ1 is calculated,

Wherein I ₁ is the light intensity value when the atmospheric aerosol particles are charged, I ₂ is the light intensity value when the atmospheric aerosol particles are not charged, until the required optical thickness is met, stop charging the atmospheric aerosol particles, and record the atmosphere Aerosol particle charging time;

Step 2: Discharge the atmospheric aerosol particles charged in Step 1, place the laser 7 on the upper surface of the glass partition 13 of the multi-layer sea fog environment simulation system 1, and place the laser 7 on the first glass window of the multi-layer sea fog environment simulation system 1. Place the optical power meter 8 under 16, turn on the laser 7 and the optical power meter 8, and the optical power meter 8 starts to record the intensity of the outgoing light; 11 is filled with sea fog particles, and the optical thickness τ ₂ of the sea fog environment simulation layer 11 is calculated from the light intensity values before and after filling the sea fog particles,

Wherein _I3 is the intensity value of the emitted light when the sea fog particles are charged, and _I4 is the value of the emitted light intensity when the sea fog particles are not charged, until the required optical thickness is met, stop charging the sea fog particles, and record the sea fog particles charging time;

Step 3, discharging the sea fog particles charged in step 2, and charging the atmospheric aerosol particles into the atmospheric environment simulation layer 12 from the atmospheric aerosol generator 6 according to the atmospheric aerosol charging time recorded in the step 1 respectively, and According to the sea fog particle filling time recorded in step 2, the sea fog particles are filled into the sea fog environment simulation layer 11 by the sea fog particle generator 5;

Step 4, adjust the polarization polarization information in the polarization transmitting system 3, and record the data measured in the polarization receiving system 4, measure the active polarization transmission characteristics without the influence of light, and the polarization polarization information includes the wavelength and polarization of the polarized light state;

Step 5. According to the composition of the sea fog particles generated by the sea fog particle generator 5, find the refractive index and particle size parameters, and use the polarized light wavelength, the polarization state of the polarized light, the refractive index of the sea fog particles, and the sea fog emitted by the polarized emission system 3. The particle size and the optical thickness measured in the sea fog environment simulation layer 11 are sequentially input into the Monte Carlo simulation program for computer simulation of the polarization degree value under the influence of no light environment;

Step 6: Discharge the atmospheric aerosol particles and sea fog particles charged in Step 3, adjust the position of the solar simulation system 2 relative to the horizontally placed circular ring guide 14 and the vertically placed circular arc guide 15, and determine the position of the sun. The altitude angle and the solar azimuth angle are re-filled with atmospheric aerosol particles in the atmospheric environment simulation layer 12 according to the atmospheric aerosol filling time recorded in step 1, and the sea fog particles are filled in the sea according to the filling time recorded in step 2. The fog environment simulation layer 11 is refilled with sea fog particles;

Step 7. Keep the polarization information in the polarization transmitting system 3 consistent with that in the fourth step, record the data measured in the polarization receiving system 4, and measure the active polarization transmission characteristics under the influence of sunlight;

Step 8: Calculate the Legendre series parameters of polarized light wavelength, solar altitude angle, solar azimuth angle, solar flux of solar simulation system 2, radiation intensity of solar simulation system 2, atmospheric aerosol particles and sea fog particles scattering characteristics Input into the RT3 program, the degree of polarization of the descending solar radiation at the position of the polarization receiving system 4 under the influence of sunlight is simulated by computer;

Step 9: Compare the degree of polarization value of active polarization under the influence of no light measured in step 4 with the degree of polarization value of active polarization under the influence of computer simulation in step 5 without the influence of light, and verify the experimental test of active polarization when there is no influence of light. And the correctness of the simulation; then the polarization degree value measured in step 7 under the influence of sunlight and the polarization degree value of the sun descending radiation at the position of the polarization receiving system 4 simulated by the computer in step 8, and the computer simulation in step 5. The polarization degree values of the active polarization under the influence of the lighting environment are compared to verify the effect of sunlight on the transmission of active polarization.

The Monte Carlo simulation program in the fifth step is a simulation program for simulating and calculating uniform spherical particles.

The RT3 program in the eighth step is a simulation program for simulating and calculating the polarized radiation between each layer of media under the influence of sunlight; the Legendre series of the scattering characteristics of atmospheric aerosols and sea fog particles are calculated by Rayleigh and Mie scattering methods, respectively.

Claims (1)

1. A verification method for testing and simulating the polarization transmission characteristics of sea fog environment under the influence of illumination, characterized in that: the system adopted by the method comprises a multi-layer sea fog environment simulation system (1), a solar simulation system (2), and a polarization emission system (3) ), polarization receiving system (4), sea fog particle generator (5), atmospheric aerosol generator (6), laser (7) and optical power meter (8), The multi-layer sea fog environment simulation system (1) is a hemispherical closed structure, a second glass window (17) is opened at the top center of the multi-layer sea fog environment simulation system (1), and a first glass window (17) is opened at the bottom center position. The glass window (16), the multi-layer sea fog environment simulation system (1) is provided with a glass partition (13) inside; the glass partition (13) separates the multi-layer sea fog environment simulation system (1) into upper and lower layers, the upper layer is It is the atmospheric environment simulation layer (12), the lower layer is the sea fog environment simulation layer (11), and the upper surface edge of the glass partition (13) is fixed with a circular ring guide (14) coaxially arranged with it; 14) is installed with a circular arc guide (15) which is slidingly matched with it; the circular arc guide (15) and the circular ring guide (14) are arranged vertically, and the circular arc guide (15) simulates the multi-layer sea fog environment The upper arc of system (1) is consistent; The multi-layer sea fog environment simulation system (1) is a hemispherical closed structure with a radius of 2.4m; the diameter of the second glass window (17) is 50mm, the diameter of the first glass window (16) is 50mm, and the atmospheric environment simulation layer The height of (12) is 1.6m, and the height of the sea fog environment simulation layer (11) is 0.8m; The sun simulation system (2) is placed on the arc-shaped guide rail (15), and the sun simulation system (2) can slide arbitrarily on the arc-shaped guide rail (15) except for the position of the second glass window (17). Simulated sun altitude angle range of 20 degrees to 89.4 degrees, and 90.4 degrees to 160 degrees; The polarization emission system (3) is placed above the second glass window (17) of the multi-layer sea fog environment simulation system (1), and the polarization emission system (3) is used to emit polarized light; The polarization receiving system (4) is placed under the first glass window (16) of the multi-layer sea fog environment simulation system (1), and the polarization receiving system (4) is used to measure the polarization state of the polarized light received by the polarization receiving system (4), and determine the polarization state of the received polarized light. Analyze the transmission characteristics of polarized light; The sea fog particle generator (5) is communicated with the sea fog environment simulation layer (11), and the sea fog particle generator (5) is used for generating sea fog particles; The atmospheric aerosol generator (6) is communicated with the atmospheric environment simulation layer (12), and the atmospheric aerosol generator (6) is used for generating atmospheric aerosol particles; The laser (7) and the optical power meter (8) are arranged facing each other, and when the optical thickness of the atmospheric environment simulation layer (12) is obtained, the laser (7) is placed on the second glass of the multi-layer sea fog environment simulation system (1). Above the window (17), the optical power meter (8) is placed on the lower surface of the glass partition (13); when used to obtain the optical thickness of the sea fog environment simulation layer (11), the laser (7) is placed on the multi-layer sea fog environment simulation layer On the upper surface of the glass partition (13) of the system (1), the optical power meter (8) is placed under the first glass window (16) of the multi-layer sea fog environment simulation system (1); The specific method includes the following steps: Step 1. Place the laser (7) above the second glass window (17) of the multi-layer sea fog environment simulation system (1), place the optical power meter (8) under the glass partition (13), and turn on the laser (7). ) and the optical power meter (8), the optical power meter (8) starts to record the intensity of the outgoing light; turn on the atmospheric aerosol generator (6), and the atmospheric aerosol generator (6) sends the multi-layer sea fog environment simulation system (1) The atmospheric environment simulation layer (12) is filled with atmospheric aerosol particles, and the optical thickness of the atmospheric environment simulation layer (12) is calculated from the light intensity values before and after filling the atmospheric aerosol particles, until the required optical thickness is satisfied, and the filling into the atmosphere is stopped. Aerosol particles, and record the filling time of atmospheric aerosol particles; Step 2: Discharge the atmospheric aerosol particles charged in Step 1, place a laser (7) on the upper surface of the glass partition (13) of the multi-layer sea fog environment simulation system (1), and place a laser (7) on the upper surface of the glass partition (13) of the multi-layer sea fog environment simulation system (1). (1) An optical power meter (8) is placed under the first glass window (16), the laser (7) and the optical power meter (8) are turned on, and the optical power meter (8) starts to record the intensity of the outgoing light; turn on the generation of sea fog particles device (5), fill sea fog particles into the sea fog environment simulation layer (11) of the multi-layer sea fog environment simulation system (1), and calculate the sea fog environment simulation layer (11) from the light intensity values before and after filling the sea fog particles Optical thickness, until the required optical thickness is met, stop charging sea fog particles, and record the charging time of sea fog particles; Step 3: Discharge the sea fog particles filled in Step 2, and fill the atmospheric aerosol generator (6) into the atmospheric environment simulation layer (12) according to the filling time of the atmospheric aerosol recorded in Step 1 respectively. The sol particles and the sea fog particles are charged into the sea fog environment simulation layer (11) from the sea fog particle generator (5) according to the sea fog particle charging time recorded in step 2; Step 4: Adjust the polarization information in the polarization transmitting system (3), record the data measured in the polarization receiving system (4), and measure the transmission characteristics of active polarization without the influence of light, and the polarization information includes polarized light wavelength and polarization state; Step 5: According to the composition of the sea fog particles generated by the sea fog particle generator (5), find the refractive index and particle size parameters, and calculate the wavelength of the polarized light, the polarization state of the polarized light, and the refraction of the sea fog particles emitted by the polarized emission system (3). The rate, particle size of sea fog particles, and the optical thickness values measured in the sea fog environment simulation layer (11) are sequentially input into the Monte Carlo simulation program for computer simulation of the polarization degree value under the influence of a non-illuminated environment; Step 6. Discharge the atmospheric aerosol particles and sea fog particles charged in step 3, and adjust the solar simulation system (2) relative to the horizontally placed circular guide rail (14) and the vertically placed circular arc guide (15). ) position, determine the solar altitude angle and the solar azimuth angle, re-fill the atmospheric aerosol particles in the atmospheric environment simulation layer (12) according to the atmospheric aerosol filling time recorded in step 1, and refill the atmospheric aerosol particles according to the atmospheric aerosol filling time recorded in step 2. Sea fog particle filling time Recharge sea fog particles in the sea fog environment simulation layer (11); Step 7: Keep the polarization information in the polarization transmitting system (3) consistent with that in step 4, record the data measured in the polarization receiving system (4), and measure the active polarization transmission characteristics under the influence of sunlight; Step 8. Restrict the wavelength of polarized light, the solar altitude angle, the solar azimuth angle, the solar flux of the solar simulation system (2), the radiation intensity of the solar simulation system (2), and the scattering characteristics of atmospheric aerosol particles and sea fog particles. The German series parameters are input into the RT3 program, and the polarization degree of the solar descending radiation at the position of the polarization receiving system (4) under the influence of sunlight is simulated by the computer; Step 9: Compare the degree of polarization value of active polarization under the influence of no light measured in step 4 with the degree of polarization value of active polarization under the influence of computer simulation in step 5 without the influence of light, and verify the experimental test of active polarization when there is no influence of light. and the correctness of the simulation; then the polarization degree value under the influence of sunlight measured in step 7 and the polarization degree value of the sun descending radiation at the position of the polarization receiving system (4) simulated by the computer in step 8, and the computer simulation in step 5. The polarization degree values of the active polarization under the influence of the unilluminated environment are compared to verify the influence of sunlight on the transmission of active polarization; The RT3 program in the eighth step is a simulation program for simulating and calculating the polarized radiation between each layer of media under the influence of sunlight; the Legendre series of the scattering characteristics of atmospheric aerosols and sea fog particles are calculated by Rayleigh and Mie scattering methods, respectively.

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