CN113029528A - Range extending device for sea fog environment simulation system and testing method - Google Patents
Range extending device for sea fog environment simulation system and testing method Download PDFInfo
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- CN113029528A CN113029528A CN202110409951.4A CN202110409951A CN113029528A CN 113029528 A CN113029528 A CN 113029528A CN 202110409951 A CN202110409951 A CN 202110409951A CN 113029528 A CN113029528 A CN 113029528A
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Abstract
A range extending device and a testing method for a sea fog environment simulation system belong to the technical field of optical range extending, and comprise a laser emission subsystem, a salt fog/water fog generation and control subsystem and a laser receiving subsystem, wherein the laser emission subsystem, the salt fog/water fog generation and control subsystem and the laser receiving subsystem are arranged in parallel and are in optical connection; the invention is used for carrying out the test and evaluation of sea surface optical transmission characteristics in the simulated sea fog environment, provides an indoor simulated experimental environment for sea surface photoelectric detection, simulates the medium particles of sea fog, the sea fog concentration, the sea surface temperature and humidity and the like, can greatly improve the transmission distance, further carries out the test and evaluation of the sea surface optical transmission characteristics in the simulated sea fog environment, provides a numerical simulation basis and more theories and technical supports for the efficiency improvement of the sea surface photoelectric detection, improves the reliability of the test effect, and provides a better environment for the subsequent theoretical research.
Description
Technical Field
The invention belongs to the technical field of optical range extending, and particularly relates to a range extending device for a sea fog simulation system and an optical characteristic testing method thereof.
Background
The sea fog is the fog generated on the sea surface due to the action of air, and the sea fog has various types and difficult parameter measurement due to different formation reasons. Sea fog, as a disaster meteorological condition, seriously affects the development of activities such as sea surface observation and measurement, military investigation, marine construction operation, marine navigation and the like, and therefore, the research on the sea fog is widely regarded. In recent years, research on the sea fog is gradually deepened into the technical fields of theoretical simulation and engineering, but no report is found on the research on the light transmission characteristics in the environment simulating the sea fog. However, when the photoelectric detection device is used in a marine environment, adverse factors such as shortened detection distance, reduced signal-to-noise ratio, reduced imaging contrast, and severe clutter interference exist, and therefore a new technical scheme is urgently needed in the prior art to solve the technical problem.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the range extending device and the test method for the sea fog environment simulation system are provided, laser transmission in a sea fog environment can be simulated in an indoor environment, medium particles, sea fog concentration, sea surface temperature, humidity and the like of sea fog are simulated at the same time, multiple turns are formed by the range extending device for sea fog simulation, transmission distance can be increased, an indoor simulation experiment environment is provided for sea surface photoelectric detection, testing and evaluation of sea surface light transmission characteristics in the simulated sea fog environment are carried out, interference of sea fog is overcome for photoelectric detection, numerical simulation basis and more theories and technical supports are provided for efficiency improvement of sea surface photoelectric detection, reliability of a test effect is improved, a more real effect can be obtained in subsequent simulation, and a better environment is provided for subsequent theoretical research.
A range extending device for a sea fog environment simulation system is characterized in that: the system comprises a laser emission subsystem, a salt spray/water spray generation and control subsystem and a laser receiving subsystem, wherein the laser emission subsystem, the salt spray/water spray generation and control subsystem and the laser receiving subsystem are arranged in parallel and are in optical connection;
the laser emission subsystem comprises a laser, a spatial light modulator, an attenuation sheet, a polarizer, a lambda/4 glass slide and a beam shaper, wherein the spatial light modulator, the attenuation sheet, the polarizer, the lambda/4 glass slide and the beam shaper are sequentially arranged in the laser emission direction of the laser;
the salt fog/water fog generation and control subsystem comprises a salt fog box and a water fog box, wherein a transmission lens group is arranged between the salt fog box and the water fog box, a reflector I is arranged on the side wall of the salt fog box close to the laser emission subsystem, and two refraction lens groups I are arranged on the upper inner wall and the lower inner wall of a box body of the salt fog box; a reflecting mirror II is arranged on the side wall of the water mist box close to the laser receiving subsystem, and two refraction mirror groups II are arranged on the upper inner wall and the lower inner wall of a box body of the water mist box;
the laser receiving subsystem comprises a triangular prism, a beam splitter prism, a polarization probe, a polarization state measuring instrument, an optical power meter probe and an optical power meter, and the triangular prism is arranged in the transmission light direction of the reflector II; the beam splitting prism is arranged in the emergent light direction of the triangular prism; the polarization probe is arranged on the horizontal emergent light of the beam splitter prism and is connected with the polarization state measuring instrument; the optical power meter probe is arranged on the vertical emergent light line of the beam splitter prism and connected with the optical power meter.
The salt spray/water spray generation and control subsystem further comprises a control power supply, a salt spray console, a salt spray generating device, a water spray console and a water spray generating device, wherein the control power supply is respectively connected with the salt spray console and the water spray console; the salt spray console is connected with the salt spray generating device; the water mist console is connected with the water mist generating device.
The refraction lens group I comprises more than 2 refraction lenses which are sequentially and alternately arranged on the upper wall and the lower wall of the salt fog box, wherein the position of each refraction lens is aligned with the incident light transmission; the refraction lens group II comprises more than 2 refraction lenses which are sequentially and alternately arranged on the upper wall and the lower wall of the water fog tank; wherein each refractor is positioned in transmission alignment with the incident ray.
A method for testing optical transmission characteristics of a sea fog environment simulation system is characterized by comprising the following steps: the range extending device for the sea fog environment simulation system comprises the following steps which are sequentially carried out,
step one, preparing an experimental environment
Cleaning the interiors of the salt spray box body and the water spray box body, and adjusting the temperature and the humidity in the two box bodies; detecting and calibrating each instrument of the laser emission subsystem and the laser receiving subsystem;
step two, simulating salt spray/water spray generation
Starting a control power supply, setting the concentration of a medium of a salt spray generating device, pouring the prepared salt water into a salt spray console, starting a switch, and filling water spray particles taking salt crystal particles as cores into a salt spray box body through the salt spray generating device to serve as a transmission medium; setting the medium concentration of the water mist generating device, pouring water into the water mist console, starting a switch, and filling water mist particles into the water mist box body through the water mist generating device to serve as a transmission medium;
step three, adjusting the laser emission subsystem
Adjusting a laser to emit laser with a corresponding wave band, parallelly emitting the laser into a spatial light modulator, attenuating the emitted laser sequentially through an attenuation sheet, changing the laser into polarized light through a polarizer, changing the polarized light into circularly polarized light through a lambda/4 glass slide, and finally dividing the circularly polarized light into adjustable light beams through a light beam shaper;
step four, increasing the range of the salt spray/water spray box body
Laser is shot into a reflecting mirror I of the salt spray tank in parallel from a beam shaper, more than one turn-back is formed by reflection of light through a refraction mirror group I on the upper inner wall and the lower inner wall of the tank body, the distance is increased, the laser passes through a transmission mirror group between the two tank bodies and then is turned back more than one time on a refraction mirror group II on the upper inner wall and the lower inner wall of the water spray tank body, and finally the laser penetrates out of a reflecting mirror II on the right side;
step five, adjusting the laser receiving subsystem
The light beam transmitted from the water mist box is horizontally incident into the beam splitter prism through the triangular prism, the light beam is divided into two mutually vertical beams, and one beam is incident into the polarization probe and is used for measuring the test value of each polarization state on the polarization state measuring instrument; one beam of the laser beam enters the probe of the optical power meter and is used for recording the power on the optical power meter, and the experimental conclusion is obtained by carrying out comparative analysis after the numerical value is stored;
step six, ending the experiment
Turning off the laser, turning on the salt spray console and the water spray console switches to exhaust air, waiting for the console to display that the concentration is reduced to a normal value, turning off the two console switches, and turning off the control power supply;
so far, the optical transmission characteristic test of the sea fog environment simulation system is completed.
The adjustable light beam in the third step comprises Gaussian light, flat top light and annular light.
Through the design scheme, the invention can bring the following beneficial effects: a range extending device and a testing method for a sea fog environment simulation system are used for testing and evaluating sea surface optical transmission characteristics under a simulated sea fog environment, providing an indoor simulated experiment environment for sea surface photoelectric detection, simulating medium particles, sea fog concentration, sea surface temperature and humidity and the like of sea fog, greatly increasing transmission distance, further testing and evaluating the sea surface optical transmission characteristics under the simulated sea fog environment, providing a numerical simulation basis and more theories and technical supports for the efficiency improvement of the sea surface photoelectric detection, improving the reliability of a testing effect, obtaining a more real effect in subsequent simulation, and providing a better environment for subsequent theoretical research.
Furthermore, the sea fog distance increasing simulation device with the transmission lens group, the refraction lens group and the transmission lens can greatly increase the transmission distance of the sea fog simulation device, better simulate the real sea fog environment and follow-up simulation, and provide enough experimental conditions for the follow-up theoretical research;
the sea fog simulator is provided with a salt fog console, a salt fog generating device, a water fog console and a water fog generating device, has the functions of configuring salt water with corresponding concentration, controlling the fog output of salt fog/water fog and the like, and is used for being matched with a sea fog simulating device;
the spatial light modulator added at the transmitting end can be separated to obtain completely coherent light and partially coherent light, and the light beam shaper can meet the effect of testing various lights such as Gaussian light, flat-top light, annular light and the like respectively so as to achieve the maximization of a simulation control environment.
Drawings
The invention is further described with reference to the following figures and detailed description:
fig. 1 is a schematic block diagram of a range extending device for a sea fog environment simulation system according to the present invention.
In the figure, 1-a laser emission subsystem, 2-a salt spray/water spray generation and control subsystem, 3-a laser receiving subsystem, 4-a salt spray tank, 5-a water spray tank, 6-a laser, 7-a spatial light modulator, 8-an attenuation sheet, 9-a polarizer, 10-lambda/4 glass slide, 11-a light beam shaper, 12-a reflector I, 13-a refractor set I, 14-a transmission lens set, 15-a refractor set II, 16-a reflector II, 17-a salt spray control console, 18-a salt spray generating device, 19-a water spray control console, 20-a water spray generating device, 21-a control power supply, 22-a triangular prism, 23-a beam splitter prism, 24-a polarization probe, 25-a polarization state measuring instrument, 26-an optical power meter probe, 27-optical power meter.
Detailed Description
A range extending device for a sea fog environment simulation system is shown in figure 1 and comprises a laser emission subsystem 1, a salt fog/water fog generation and control subsystem 2 and a laser receiving subsystem 3, wherein the salt fog/water fog generation and control subsystem 2 is provided with a salt fog generation device 18, a salt fog control console 17, a water fog generation device 20, a water fog control console 19, a reflector I12, a refractor set I13, a transmission lens set 14, a refractor set II 15 and a reflector II 16, and water fog particles which can be set to have different concentrations and take salt crystal particles as cores are generated in the salt fog generation device 18 and serve as transmission media; a water mist generating device 20 and a reflector are arranged in the water mist box 5, and water particles with different set concentrations are generated in the water mist generating device 20 and serve as a transmission medium; the laser emission subsystem 1 comprises a laser 6, a spatial light modulator 7, an attenuation sheet 8, a polarizer 9 and a lambda/4 glass slide 10, s-p completely coherent light and partially coherent light are emitted from the spatial light modulator 7, and laser emitted into the salt fog box from a light beam shaper 11 has various adjustable light beams such as Gaussian light, flat-top light, annular light and the like; the laser receiving subsystem 3 comprises a triangular prism 22, a beam splitter prism 23, an optical power meter 27, an optical power meter probe 26, a polarization probe 24 and a polarization state measuring instrument 25, wherein the beam splitter prism 23 can split beams emitted from the sea fog simulation device, one beam of light is received by the optical power meter probe 26, the other beam of light is received by the polarization probe 24, real-time testing can be achieved, and a simulated sea fog environment can be simulated;
the refraction mirror group I13 comprises n refraction mirrors which are sequentially and alternately arranged on the upper wall and the lower wall of the salt fog box, wherein the upper refraction mirror and the lower refraction mirror in the box body can be arbitrarily dragged to adapt to different incident light rays for transmission and alignment, so that the transmission distance of a system capable of simulating the sea fog environment is greatly increased, the reliability of an experimental result is increased, and the robustness of the experimental result is obviously improved; each refractor has the function of increasing laser threads so as to simulate the scene of long-distance light transmission, light rays are parallelly injected from the reflector I12 and enter the water mist box 5 after being repeatedly refracted by the refractors in the salt mist box 4; the refraction lens group II comprises n refraction lenses which are sequentially and alternately arranged on the upper wall and the lower wall of the water fog tank 5; wherein, every refractor has played and has increased the laser thread and then has simulated the scene of remote light transmission, and light penetrates from the parallel incidence of transmission mirror group 14, wears out after the refractor in the water smoke box refracts repeatedly.
The specific range-extending formula of the invention is as follows: Δ l ═ 1+ Ni) L, the required effect can be achieved by adding corresponding transmission mirrors and reflection mirrors required by the experiment.
The optical transmission characteristic testing method for the sea fog environment simulation system comprises the following steps of sequentially carrying out the following steps,
step one, preparing an experimental environment
Cleaning the interior of the box bodies of the salt fog box 4 and the water fog box 5, and detecting and calibrating each instrument of the transmitting and receiving subsystem 1; the temperature and the humidity in the two boxes are adjusted to reach proper conditions.
Step two, simulating the generation of salt fog/water fog
Starting a control power supply 21, setting the medium concentration of a salt spray generating device 18, pouring the prepared salt water into a salt spray console 17, starting a switch, and filling water spray particles taking salt crystal particles as cores into a salt spray box body through the salt spray generating device 18 to serve as a transmission medium; setting the concentration of the medium of the water mist generating device 20, pouring water into the water mist console 19, starting a switch, and filling water mist particles into the water mist box body through the water mist generating device 20 to be used as a transmission medium.
Step three, adjusting the laser emission subsystem 1
The laser 6 is adjusted to emit laser with corresponding wave bands, the laser is parallelly emitted into the spatial light modulator 7, in order to avoid damaging a receiving device, the laser needs to be attenuated, the laser passes through the attenuation sheet 8, then the light beam is changed into polarized light through the polarizer 9, then the polarized light is changed into circularly polarized light through the lambda/4 glass slide 10, and finally the laser can be divided into various adjustable light beams such as Gaussian light, flat light and annular light through the light beam shaper 11.
Step four, completing the reflector group building of the salt spray/water spray box body
The laser beam is shot into a reflecting mirror I12 of the salt fog tank from a beam shaper 11 in parallel, then forms multiple turning back through a refracting mirror group I13 on the upper inner wall and the lower inner wall of the tank body by utilizing the reflection of the light, increases the distance, passes through a transmission mirror group 14 between the two tank bodies, then turns back again through a refracting mirror group II 15 on the upper inner wall and the lower inner wall of the water fog tank body, and finally passes out of a reflecting mirror II 16 on the right side of the water fog tank.
Step five, adjusting the laser receiving subsystem
The light beam transmitted from the water mist box horizontally enters a beam splitter prism 23 through a triangular prism 22, the light beam is divided into two mutually vertical beams, and one beam enters a polarization probe 24 for measuring the test value of each polarization state on a polarization state measuring instrument 25; a beam is transmitted into the probe 26 of the optical power meter to record the power on the optical power meter 27, and the experimental conclusion is obtained by comparing and analyzing the stored values.
Step six, ending the experiment
And (3) turning off the laser 6, turning on switches of the salt fog console 17 and the water fog console 19 to exhaust air, waiting for the concentration displayed by the two consoles to be reduced to a normal value, turning off the switches of the two consoles, and turning off the control power supply 21.
Claims (5)
1. A range extending device for a sea fog environment simulation system is characterized in that: the system comprises a laser emission subsystem (1), a salt spray/water spray generation and control subsystem (2) and a laser receiving subsystem (3), wherein the laser emission subsystem (1), the salt spray/water spray generation and control subsystem (2) and the laser receiving subsystem (3) are arranged in parallel and are in optical connection;
the laser emission subsystem (1) comprises a laser (6), a spatial light modulator (7), an attenuation sheet (8), a polarizer (9), a lambda/4 glass slide (10) and a beam shaper (11), wherein the spatial light modulator (7), the attenuation sheet (8), the polarizer (9), the lambda/4 glass slide (10) and the beam shaper (11) are sequentially arranged in the laser emission direction of the laser (6);
the salt fog/water fog generation and control subsystem (2) comprises a salt fog box (4) and a water fog box (5), a transmission lens group (14) is arranged between the salt fog box (4) and the water fog box (5), a reflector I (12) is arranged on the side wall of the salt fog box (4) close to the laser emission subsystem (1), and more than two refraction lens groups I (13) are arranged on the upper inner wall and the lower inner wall of the box body of the salt fog box (4); a reflecting mirror II (16) is arranged on the side wall of the water mist box (5) close to the laser receiving subsystem (3), and more than two refracting mirror groups II (15) are arranged on the upper and lower inner walls of the box body of the water mist box (5);
the laser receiving subsystem (3) comprises a triangular prism (22), a beam splitter prism (23), a polarization probe (24), a polarization state measuring instrument (25), an optical power meter probe (26) and an optical power meter (27), wherein the triangular prism (22) is arranged in the transmission light direction of the reflector II (16); the beam splitter prism (23) is arranged in the emergent light direction of the triangular prism (22); the polarization probe (24) is arranged on the horizontal emergent light of the beam splitter prism (23) and is connected with the polarization state measuring instrument (25); the optical power meter probe (26) is arranged on a vertical emergent light of the beam splitter prism (23) and is connected with the optical power meter (27).
2. The range extender for a sea fog environment simulation system as claimed in claim 1, wherein: the salt spray/water spray generation and control subsystem (2) further comprises a control power supply (21), a salt spray console (17), a salt spray generating device (18), a water spray console (19) and a water spray generating device (20), wherein the control power supply is respectively connected with the salt spray console (17) and the water spray console (19); the salt spray console (17) is connected with a salt spray generating device (18); the water mist console (19) is connected with a water mist generating device (20).
3. The range extender for a sea fog environment simulation system as claimed in claim 1, wherein: the refractor set I (13) comprises more than 2 refractors, and the refractors are sequentially and alternately arranged on the upper wall and the lower wall of the salt fog box (4), wherein the position of each refractor is aligned with the transmission of incident light; the refractor set II (15) comprises more than 2 refractors which are alternately arranged on the upper wall and the lower wall of the water mist box (5) in sequence; wherein each refractor is positioned in transmission alignment with the incident ray.
4. A method for testing optical transmission characteristics of a sea fog environment simulation system is characterized by comprising the following steps: the range extending device for the sea fog environment simulation system of the application claims 1-3 comprises the following steps which are carried out in sequence,
step one, preparing an experimental environment
Cleaning the interiors of the salt fog box (4) and the water fog box (5), and adjusting the temperature and the humidity in the two boxes; detecting and calibrating each instrument of the laser emission subsystem (1) and the laser receiving subsystem (3);
step two, simulating salt spray/water spray generation
Starting a control power supply (21), setting the medium concentration of a salt spray generating device (18), pouring the prepared salt water into a salt spray console (17), starting a switch, and filling water spray particles taking salt crystal particles as cores into a salt spray box body through the salt spray generating device (18) to serve as a transmission medium; setting the medium concentration of a water mist generating device (20), pouring water into a water mist console (19), starting a switch, and filling water mist particles into a water mist box body through the water mist generating device (20) to be used as a transmission medium;
step three, adjusting the laser emission subsystem (1)
The adjustable laser (6) emits laser with a corresponding wave band, the laser is parallelly emitted into the spatial light modulator (7), the emitted laser is sequentially attenuated by the attenuation sheet (8), is changed into polarized light by the polarizer (9), is changed into circularly polarized light by the lambda/4 glass slide (10), and is finally divided into adjustable light beams by the light beam shaper (11);
step four, increasing the range of the salt spray/water spray box body
Laser is shot into a reflecting mirror I (12) of the salt spray box in parallel from a light beam shaper (11), the reflection of the light forms more than one turn-back through a refracting mirror group I (13) on the upper inner wall and the lower inner wall of the box body, the distance is increased, the laser passes through a transmitting mirror group (14) between the two box bodies and then is subjected to more than one turn-back on a refracting mirror group II (15) on the upper inner wall and the lower inner wall of the water spray box body, and finally the laser penetrates out of a reflecting mirror II (16) on the;
step five, adjusting the laser receiving subsystem
The light beam transmitted from the water mist box horizontally enters a beam splitter prism (23) through a triangular prism (22), the light beam is split into two mutually perpendicular beams, and one beam enters a polarization probe (24) for measuring the test value of each polarization state on a polarization state measuring instrument (25); a beam of probe (26) which is transmitted into the optical power meter and is used for recording the power on the optical power meter (27), and comparing and analyzing the values after the values are stored to obtain an experimental conclusion;
step six, ending the experiment
Turning off the laser (6), turning on switches of a salt fog console (17) and a water fog console (19) to exhaust air, waiting for the console to display that the concentration is reduced to a normal value, turning off the switches of the two consoles, and turning off a control power supply (21);
so far, the optical transmission characteristic test of the sea fog environment simulation system is completed.
5. The method for testing the optical transmission characteristics of the sea fog environment simulation system as claimed in claim 4, wherein: the adjustable light beam in the third step comprises Gaussian light, flat top light and annular light.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113758568A (en) * | 2021-08-26 | 2021-12-07 | 长春理工大学 | Simulation device for sea fog polarization transmission and test method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113758568A (en) * | 2021-08-26 | 2021-12-07 | 长春理工大学 | Simulation device for sea fog polarization transmission and test method thereof |
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