Experimental system and experimental method for simulating complex weather environment for imaging detection

Abstract

The present invention discloses an experimental system for simulating complex weather environments for imaging detection, including a simulation chamber, a fog generating system, an airflow control system and a rain generating system. The simulation chamber is provided with infrared transparent glass, the top of the simulation chamber is provided with a rain hole, and the side wall of the simulation chamber is provided with a water outlet. The fog generating system includes a chassis, a water tank and an ultrasonic atomization generator for introducing fog into the simulation chamber. The airflow control system includes a housing, an air pipe and a valve for introducing airflow into the simulation chamber. The rain generating system includes a rain generating host, an outlet pipe and an inlet pipe for allowing water droplets to enter the simulation chamber, and the inlet pipe is connected to the outlet on the simulation chamber. The present invention simulates and controls the changes in weather environments such as rain, fog and airflow, and provides corresponding experimental conditions for imaging detection in visible light and infrared bands, so that imaging detection is no longer affected by natural weather, and complex weather environments can be regulated.

Description

Technical Field

[0001] The present invention belongs to the field of experimental instruments, and more specifically, relates to an experimental system and an experimental method for simulating complex weather environments for imaging detection. Background Art

[0002] At present, with the development of imaging detection technology, obtaining accurate image information and multi-mode and multi-dimensional optical information is a very important research direction. In the real natural environment, there are various factors that affect the imaging quality and the acquisition of optical information. Among them, the impact of weather factors on imaging detection is very common, including natural weather conditions such as fog, rain, and snow. In order to explore the extent to which weather factors in imaging detection affect the quality of imaging, the functionality and reliability tests of the imaging detection system need to be completed in different weather environments. However, weather changes are often relatively stable in a short period of time, and generally there will not be several drastic changes in the weather in a short period of time. Therefore, the experimental conditions of imaging detection research are often affected by the weather, and the test objectives cannot be achieved in a short period of time. Therefore, the experimental system that simulates the weather environment is particularly important.

[0003] Under the existing experimental equipment and technical conditions, it is often a single simulation of weather conditions such as rain, fog, and wind, and the simulated weather conditions cannot be well controlled, which cannot meet the experimental needs of imaging detection. Even if there is a simulation system that combines these factors, after the rainfall and airflow increase, the raindrops of heavy rain will also drag the fog droplets, causing the suspended fog droplets to settle quickly, and the fog will dissipate quickly. The strong wind formed by the airflow will also blow away the fog. Combined with the high temperature environment in the simulation chamber, the fog will evaporate in large quantities, forming a large amount of hot steam, and losing the effect of fog. Therefore, some existing simulation systems cannot produce the required fog environment in heavy rain, strong wind and high temperature environments, and cannot form a fog environment. Fog is the main factor affecting imaging detection. Simulating the fog environment under high temperature, strong wind or heavy rain, exploring the effects of extreme harsh environments and the superposition of high temperature, strong wind, heavy rain and fog conditions on imaging detection, is closer to the real environment or takes into account the effects of various complex environments on imaging detection. At present, rain, fog and airflow are generally formed under conventional experimental conditions for experiments, and imaging detection is not carried out under heavy rain, strong wind and high temperature experimental conditions. Summary of the invention

[0004] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides an experimental system and an experimental method for simulating complex weather environments for imaging detection. By simulating and controlling changes in weather environments such as rain, fog, and airflow, corresponding experimental conditions are provided for imaging detection in the visible light and infrared bands. This makes it possible for imaging detection to be no longer affected by the natural weather environment, and to control complex weather environments, and to complete relevant testing and research under laboratory conditions.

[0005] To achieve the above object, according to one aspect of the present invention, an experimental system for simulating complex weather environment for imaging detection is provided, characterized in that it includes a simulation chamber, a rain generation system, a fog generation system and an airflow control system, wherein:

[0006] Infrared-transmitting glass is installed on two opposite side walls of the simulation chamber, respectively, and wipers are installed at positions corresponding to the infrared-transmitting glass of the simulation chamber. A rain hole is provided on the top of the simulation chamber, and a water outlet is provided on the side wall of the simulation chamber;

[0007] The rain generating system comprises a rain generating main unit, a water outlet pipe and a water inlet pipe, wherein the water outlet pipe and the water inlet pipe are respectively connected to the rain generating main unit, and a nozzle is arranged on the water outlet pipe, and the nozzle is arranged at the rain hole on the top of the simulation chamber to allow water droplets to enter the simulation chamber, and the water inlet pipe is connected to the water outlet on the simulation chamber to allow water to circulate between the simulation chamber and the rain generating main unit;

[0008] The mist generating system comprises a water tank and an ultrasonic atomizing generator, wherein the inlet of the ultrasonic atomizing generator is connected to the water tank, and the outlet of the ultrasonic atomizing generator is connected to the simulation chamber through a mist guiding pipe, so as to guide the mist into the simulation chamber;

[0009] The airflow control system includes a shell, an air pipe and a valve. The air pipe is installed on the shell. The air inlet of the air pipe is connected to the air source and the air outlet is connected to the simulation chamber to introduce the airflow into the simulation chamber. The valve is installed on the air pipe.

[0010] Preferably, the mist generating system further comprises a fan arranged in the chassis for blowing the generated mist toward the mist guide pipe.

[0011] Preferably, the air flow control system further comprises a gas temperature control module for controlling the gas temperature at the gas outlet of the air pipe.

[0012] Preferably, the air flow regulation system further comprises a gas flow control module, the gas flow control module is mounted on the air pipe, and the valve is located between the gas flow control module and the air inlet of the air pipe.

[0013] Preferably, the airflow control system also includes a gas temperature control module and a gas flow control module, the gas temperature control module is used to control the gas temperature at the air outlet of the air pipe, the valve is located between the gas flow control module and the air inlet of the air pipe, and the airflow control system also includes a gas output analysis module for obtaining the flow and temperature of the current output gas and feeding it back to the control system, so that the control system can control the gas temperature and flow through the gas temperature control module and the gas flow control module, thereby realizing closed-loop control.

[0014] Preferably, the rain generating host has a rain flow regulating knob for adjusting the water flow of the nozzle; the ultrasonic atomization generator has a mist volume regulating knob for adjusting the mist flow.

[0015] Preferably, the simulation chamber has a breathable gap to connect the inside and outside of the simulation chamber.

[0016] According to another aspect of the present invention, an experimental method of the environmental experimental system simulating complex weather is also provided, which is characterized by comprising the following steps:

[0017] 1) The internal volume of the simulation chamber is 100L to 150L;

[0018] A non-self-luminous target is placed at a position corresponding to the infrared-transmitting glass in the simulation chamber, and then a light source and an imaging detector are arranged at positions corresponding to the target outside the simulation chamber, and the light source and the imaging detector are located on the same side of the simulation chamber. The light source emits light to illuminate the target, and the target reflects the light, so that the imaging detector performs imaging detection on the target;

[0019] Alternatively, a self-luminous target is placed at a position corresponding to the infrared-transmitting glass in the simulation chamber, and then an imaging detector is arranged at a position corresponding to the target outside the simulation chamber, so that the imaging detector 104 performs imaging detection on the target;

[0020] Alternatively, a light source and a beam quality analyzer are arranged at positions corresponding to the infrared-transmitting glass of the simulation chamber, and the simulation chamber is between the light source and the beam quality analyzer. The light emitted by the light source passes through the infrared-transmitting glass and enters the beam quality analyzer, so as to observe the influence of different weather environments on the beam quality through the beam quality analyzer.

[0021] 2) Initially, the temperature in the simulation chamber is T = room temperature ~ 100 °C, and:

[0022] The air flow is formed by introducing gas into the simulation chamber through the air flow control system, and the flow rate of the air flow in the simulation chamber is G = 0.01m 3 / min~0.05m 3 / min;

[0023] The rain generating system sprays water droplets into the simulation chamber to simulate rainfall, and the flow rate of rain in the simulation chamber is R = 0.5L / min ~ 2L / min;

[0024] The fog is introduced into the simulation chamber through the fog generating system, and the flow rate of the fog in the simulation chamber is F = 0.1L / h ~ 0.3L / h;

[0025] 3) When G>0.05m 3 / min, T>100℃, 2L / min<R<6L / min, and the diameter of the water droplets sprayed by the nozzle is D=1mm~2mm, the mist generation system controls the flow rate of the mist entering the simulation chamber to be F'=1.2F~1.4F;

[0026] 4) When G>0.05m 3 / min, T>100℃, R=6L / min, and the diameter of the water droplets sprayed by the nozzle is D=4mm, the fog generating system controls the amount of fog entering the simulation chamber F″=1.6F~2F to offset the dissipation of fog caused by the dragging effect of raindrops.

[0027] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0028] 1) The fog generating system, airflow control system and rain generating system of the present invention can simulate the conditions of fog, wind and rain in the simulation chamber. In one experimental equipment body, the changes of multiple weather environments can be simulated simultaneously, rather than just a single one such as fog or rain, thereby reducing the required experimental equipment and integrating multiple functions in a single experiment.

[0029] 2) Imaging detection experiments are not restricted by natural weather environments. Experimental requirements in various weather environments can be completed under laboratory conditions, saving the time required for experiments.

[0030] 3) Simulation of complex weather conditions such as fog, rain and airflow can be continuously regulated with fast response speed and high control accuracy.

[0031] 4) Wide application range and wide coverage band. Imaging detection can be carried out using the system of the present invention for qualitative or quantitative experimental testing and evaluation, including static or dynamic simulation of wavefront imaging, polarization imaging, light field imaging, spectral imaging, compound eye imaging, synthetic aperture imaging and composite imaging under complex aerodynamic optical environments or conditions. At the same time, imaging detection experiments can be carried out from the visible light band to the far infrared band. The infrared-transmitting glass has a high transmittance, and can still reach a transmittance of 90% at a wavelength of 11μm, covering a wide band.

[0032] 5) Easy to use. The present invention packages each system component, which is easy to use, disassemble and maintain. After each generating system and control system are powered on, the operation is performed according to the prompts of the buttons, with no learning cost and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention under one viewing angle;

[0034] Figure 2 It is a schematic diagram of the structure of the present invention from another viewing angle;

[0035] Figure 3 is a schematic diagram of a simulation chamber in the present invention;

[0036] Figure 4 is a schematic diagram of a rain generating system in the present invention;

[0037] Figure 5 is a schematic diagram of a fog generating system in the present invention;

[0038] Figure 6 It is a schematic diagram of the airflow control process in the present invention;

[0039] Figure 7 Schematic diagram of the airflow control system of the present invention.

[0040] Figure 8 Schematic diagram of light beam evaluation of the experimental method of the present invention.

[0041] Fig. 9 It is a schematic diagram of the transmission imaging mode of the experimental method of the present invention.

[0042] Fig.10 It is a schematic diagram of the reflective imaging mode of the experimental method of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] like Figure 1 to Figure 7 As shown, an experimental system for simulating complex weather environment for imaging detection comprises a simulation chamber 1, a rain generating system 2, a fog generating system 3 and an airflow control system 4, wherein:

[0045] Infrared transparent glass 6 is installed on two opposite side walls of the simulation chamber 1 to ensure the transmission of visible light and infrared light. Figure 3As shown, the front and rear of the simulation chamber 1 are both provided with infrared-transmitting glass 6, which can reach a transmittance of more than 90% from the visible light band to the far infrared band (at 11 μm). A wiper 7 is provided inside the infrared-transmitting glass 6 to ensure that no water droplets remain on the infrared-transmitting glass 6 in the simulated rainy and foggy weather environment. The simulation chamber 1 is provided with wipers 7 at positions corresponding to each infrared-transmitting glass 6, a rain hole 8 is provided on the top of the simulation chamber 1, and a water outlet 9 is provided on the side wall of the simulation chamber 1.

[0046] The rain generating system 2 includes a rain generating main unit, a water outlet pipe 19 and a water inlet pipe 18, wherein the water outlet pipe 19 and the water inlet pipe 18 are respectively connected to the rain generating main unit, and a nozzle 20 is arranged on the water outlet pipe 19, and the nozzle 20 is arranged at the rain hole 8 on the top of the simulation chamber 1, so as to allow the sprayed water droplets to enter the simulation chamber 1 to simulate raindrops. In the simulation chamber 1, the water droplets sprayed by the nozzle 20 form "raindrops", and the water outlet flow of the nozzle 20 is adjustable, so as to adjust the diameter of the water droplets entering the simulation chamber 1. The water inlet pipe 18 can be connected to the water outlet 9 on the simulation chamber 1, so as to allow water to circulate between the simulation chamber 1 and the rain generating main unit, thereby saving water resources; in addition, the water inlet pipe 18 can also be connected to other water sources.

[0047] The mist generating system 3 includes a water tank and an ultrasonic atomizer. The inlet of the ultrasonic atomizer is connected to the water tank, and the outlet of the ultrasonic atomizer is connected to the simulation chamber 1 through a mist guide pipe 24 for introducing mist into the simulation chamber 1.

[0048] The airflow control system 4 includes a shell, an air pipe and a valve 35. The air pipe is installed on the shell. The air inlet of the air pipe is connected to the air source and the air outlet is connected to the simulation chamber 1 for introducing the airflow into the simulation chamber 1. The valve 35 is installed on the air pipe.

[0049] Furthermore, the mist generating system 3 also includes a fan disposed in the chassis for blowing the generated mist toward the mist guide pipe 24 .

[0050] Furthermore, the air pipe includes an inner tube arranged in the outer shell 31 and an outer tube 38 arranged outside the outer shell 31, the outer tube 38 is connected to the simulation chamber 1, the valve 35 is arranged on the inner tube, and the inner tube and the outer tube 38 are connected through an air outlet interface 33 arranged on the side wall of the outer shell 31.

[0051] Furthermore, the inner tube includes multiple branch tubes and a main gas converging tube, the air inlet of each branch tube is connected to a gas source respectively, the gas stored in each gas source is different, the air outlet of each branch tube is connected to the main gas converging tube respectively, the air outlet of the main gas converging tube is connected to the outer tube 38, and a valve 35 and a gas flow control module 36 are provided on each branch tube.

[0052] Furthermore, the air flow control system 4 also includes a gas temperature control module for controlling the gas temperature at the gas outlet of the air pipe.

[0053] Furthermore, the air flow control system 4 further comprises a gas flow control module 36 , the gas flow control module 36 is mounted on the air pipe, and the valve 35 is located between the gas flow control module 36 and the air inlet of the air pipe.

[0054] Furthermore, the airflow control system 4 also includes a gas temperature control module and a gas flow control module 36. The gas temperature control module is used to control the gas temperature at the air outlet of the air pipe. The valve 35 is located between the gas flow control module 36 and the air inlet of the air pipe. The airflow control system 4 also includes an airflow output analysis module 39, which is used to obtain the flow and temperature of the current output gas and feed it back to the control system, so that the control system can control the gas temperature and flow through the gas temperature control module and the gas flow control module 36, thereby realizing closed-loop control.

[0055] Furthermore, the simulation chamber 1 has a breathable gap to connect the inside and outside of the simulation chamber 1.

[0056] Reference Figure 3 The left side of the simulation chamber 1 is provided with an airflow interface 5 for connecting to an airflow control system 4, and the right side is provided with a water outlet 9 for connecting to a rain generating system and a fog interface 10 for connecting to a fog generating system. The fog generating system is connected to the fog interface 10 via a fog guide pipe 24, and the rain generating system is connected to the water outlet 9 of the simulation chamber 1 via a water inlet pipe 18, and is connected to the rainfall hole 8 of the simulation chamber 1 via a nozzle 20 on the water outlet pipe 19. The airflow control system 4 is connected to the airflow interface 5 of the simulation chamber 1 via an external pipe 38.

[0057] Reference Figure 4The rain generating host has a water outlet interface 11, a water inlet interface 12, a display screen 13, a rain flow adjustment knob 14, a power button 15, a start button 16 and a stop button 17. When in use, turn on the power of the rain generating system, press the power button 15, then press the start button 16, adjust the rain flow adjustment knob 14, the water flow of the nozzle 20 can be adjusted to simulate the size of the rain, and the display screen 13 shows the current flow size. Before turning on the rain generating system 2, connect the water outlet interface 11 with the water outlet pipe 19, and the water inlet interface 12 with the water inlet pipe 18. A certain amount of water should be filled into the simulation chamber 1, and the depth of the water should be higher than the height of the main body water outlet 9 to ensure that the rain generating system 2 can work normally. The normal working process of the rain generating system is as follows: the water in the simulation chamber 1 enters the rain generating system 2 through the water outlet pipe 18, and the water flow is adjusted by adjusting the flow adjustment knob 14, thereby realizing a continuous regulation of the rainfall. Then the water passes through the rain generating system 2, and is connected to the rain hole 8 on the top of the water tank through the water inlet pipe 19 and the nozzle 20, and falls from the top of the simulation chamber 1 to complete the rain simulation. In addition, by changing the aperture of the nozzle 20, the size of the raindrops can be changed to simulate raindrops of different sizes. At the same time, in this process, the water enters the rain generating system 2 from the water outlet 9 at the bottom of the simulation chamber 1, and then falls from the top and returns to the bottom. There is no loss or waste of water, thereby ensuring the recycling of water, which brings convenience to the experiment.

[0058] Reference Figure 5 The mist generating system 3 also has a mist guide interface 21 and a water tank cover 25, and the ultrasonic atomizer has a mist flow adjustment knob 22 and a power button 23. The normal working process of the mist generating system 3 is as follows: before starting, open the water tank cover 25 to add an appropriate amount of water into the water tank, cover the water tank cover, turn on the power, press the power button 23, and after the mist generating system 3 is turned on, the water built in the water tank is broken up into water mist particles with a diameter of about 5μm by the high-frequency oscillation of the atomizer sheet of the ultrasonic atomizer generator, which is basically consistent with the particle size of natural water mist. Through the internal fan, the water mist is blown into the simulation chamber 1 through the mist guide pipe 24 to complete the simulation of the mist. At the same time, by adjusting the mist flow adjustment knob 22, the amount of mist output per unit time can be adjusted, and then the concentration of the mist in the simulation chamber 1 can be adjusted.

[0059] Reference Figure 6 , which is a flow chart of the airflow control system 4, the inner tube has four branches, from the four gas inputs, the output gas type is selected, the flow rate and temperature of the output gas are controlled, and an overall process of airflow control is clearly pointed out.

[0060] Reference Figure 7, the air flow control system 4 also has a support foot 32, an air outlet interface 33 and an air inlet interface 34. The support foot 32 is arranged at the bottom of the shell 31. When the gas control system 4 is in use, the air inlet interface 34 at one end of the inner tube is connected to the gas pipeline on the gas source or the compressed gas cylinder as the gas source, and the air outlet interface 33 is connected to the outer tube 38. Because the air flow control system 4 can select and output four-way gas, when connecting, pay attention to the type of gas connected to each pipeline, mark it well, and consider other situations that may occur when the gas is mixed. After the gas circuit is connected, turn on the power of the air flow control system 4, select one of the valves 35 to open, adjust the opening of the valve 35 and the gas flow control module 36 to adjust the flow of the output gas, and the pressure of the output gas is 0.1MPa~0.5MPa. Through the gas temperature control module 37, adjust the temperature of the gas at the outlet, and the current flow and temperature of the output gas will be displayed on the display screen. At the same time, the air flow output analysis module 39 can analyze the current actual output gas flow and temperature, so as to achieve a feedback control purpose and improve the accuracy of regulation. By outputting the temperature and flow rate of different gases, we can simulate the weather environment of strong winds and high temperatures and explore the effects of different gases and different temperatures on imaging detection experiments.

[0061] The simulated complex weather environment test system for imaging detection of the present invention provides an experimental environment for imaging detection experiments, breaks the limitations of weather and time conditions, simulates various weather changes, and has the characteristics of integration, convenient adjustment, and easy use.

[0062] According to another aspect of the present invention, an experimental method of the environmental experimental system simulating complex weather is also provided, comprising the following steps:

[0063] 1) The internal volume of the simulation chamber is 100L to 150L;

[0064] A non-self-luminous target 102 is placed at a position corresponding to the infrared-transmitting glass in the simulation chamber, and then a light source 101 and an imaging detector 104 are arranged at a position corresponding to the target 102 outside the simulation chamber 1, and the light source 101 and the imaging detector 104 are located on the same side of the simulation chamber. The light source 101 emits light to irradiate the target 102, so that the target 102 reflects the light and the imaging detector 104 performs imaging detection on the target 102;

[0065] Alternatively, the self-luminous target 102 is placed at a position corresponding to the infrared-transmitting glass 6 in the simulation chamber 1, and then an imaging detector 104 is arranged at a position corresponding to the target 102 outside the simulation chamber, so that the imaging detector 104 performs imaging detection on the target 102;

[0066] Alternatively, the light source 101 and the beam quality analyzer 103 are respectively arranged at the position corresponding to the infrared transparent glass 6 of the simulation chamber 1, and the simulation chamber 1 is between the light source 101 and the beam quality analyzer 103, and the light emitted by the light source 101 passes through the infrared transparent glass 6 and then enters the beam quality analyzer 103.

[0067] When conducting imaging detection experiments, including wavefront imaging, polarization imaging, light field imaging, spectral imaging, compound eye imaging, synthetic aperture imaging, and composite imaging, selecting the required imaging band, setting up the experimental environment, and starting the entire experimental system can achieve better experimental results. Figure 8 Beam evaluation is also a type of imaging detection experiment. When performing beam evaluation, the target object 102 is not required. The light source 101, the center of the infrared-transmitting glass of the simulation chamber, and the beam quality analyzer 103 are basically placed at the same height. The light source 101 and the beam quality analyzer 103 are placed on the front and back sides of the simulation chamber 1 to observe the impact of different complex weather environments on the beam quality (such as air turbulence, rain and fog on the wavefront disturbance).

[0068] Alternatively, the position of different targets 102 and whether the light source 101 is needed are selected according to whether the observed target 102 can emit light by itself and the light source 101 for imaging detection is different. Fig. 9 For the self-luminous target 102, the target 102 can be placed in the simulation chamber 1, and the height of the target 102 is kept basically aligned with the center of the infrared transparent glass. The light path of the experiment includes the experimental system of the present invention, the target 102, the light source 101 and the imaging detector 104. The imaging detector 104 is placed in the front of the simulation chamber 1, and the target 102 is placed in the simulation chamber 1. The light source 101 ensures that there is a suitable output in the imaging detector 104. This method corresponds to a transmission imaging mode. Fig.10For the target object 102 that cannot emit light by itself, an external light source 101 is used to form a reflective imaging mode, and the target object 102 is placed in the simulation chamber 1, and the height of the target object 102 is kept basically aligned with the center of the infrared transparent glass. The optical path of the experiment includes the experimental system described in the present invention, the target object 102, the light source 101 (if the light source 101 adopts the laser emission method, the light source 101 includes a laser and a beam expander), and an imaging detector 104. According to the different bands required for the imaging experiment, a light source 101 of the corresponding band (visible light band, near infrared, mid-infrared, far infrared band) is selected or a wide-spectrum light source 101 is selected for the experiment. The wide-spectrum light source 101 covers one or more bands of visible light, short-wave infrared, mid-wave infrared, and long-wave infrared. The external light source 101 can also include natural light, such as the sun, the earth, the moon, and starlight. The imaging detector 104 is placed in the front of the simulation chamber 1, the target object 102 is placed in the simulation chamber 1 of the imaging detector 104, the light source 101 and the imaging detector 104 are placed on the same side. If a light source 101 containing a laser is selected, the beam expander is placed between the laser and the simulation chamber to ensure that the laser passes through the beam expander and the center of the light beam is kept on the same horizontal line with the center of the infrared-transmitting glass, thereby ensuring that the imaging detector 104 receives a suitable signal and has a suitable output response.

[0069] 2) Turn on the experimental system described in the present invention, adjust the rain generation system, fog generation system and airflow control system, and adjust the three systems to observe the output changes of the imaging detector 104, so as to explore the influence of single rain, fog, airflow and temperature change conditions on imaging detection. Because complex weather conditions are not a single type of weather, they are often coupled together, so simulating complex weather conditions requires the control system described in the present invention to work together. Therefore, the system shown in the present invention can not only simulate normal weather environments, but also simulate and further demonstrate extremely harsh or complex environments. (Such as extreme high temperatures, heavy rains, dense fog, etc. or complex and multiple weather environments).

[0070] Initially, the temperature in the simulation chamber 1 is T = room temperature ~ 100 ° C, and:

[0071] The air flow is introduced into the simulation chamber 1 by the air flow control system 4 to form an air flow, and the flow rate of the air flow in the simulation chamber 1 is G = 0.01m 3 / min~0.05m 3 / min;

[0072] The rain generating system 2 sprays water droplets into the simulation chamber 1 through the nozzle 20 to simulate rainfall, and the flow rate of rain in the simulation chamber 1 is R = 0.5L / min ~ 2L / min;

[0073] The mist is introduced into the simulation chamber 1 through the mist generating system 3, and the flow rate of the mist in the simulation chamber 1 is F = 0.1 L / h ~ 0.3 L / h;

[0074] When the system of the present invention starts to run, there is no fog in the simulation chamber 1. Under the same output of the fog generating system 3, the air flow temperature of the air flow control system is adjusted to be below 40°C and the gas flow rate is 0.01m 3 / min~0.05m 3 / min, and the fog generating system and the airflow control system are turned on at the same time. The low temperature and small flow of airflow help the water mist to quickly and evenly fill the entire box, which can correspondingly reduce the time required to fill the entire box by 20% to 40%. At the same time, when maintaining a stable fog concentration, the airflow control system 4 is adjusted to output a lower temperature and a smaller flow, so that the fog is evenly distributed in the simulation chamber 1, which can reduce the output of the fog generating system 3.

[0075] 3) When G>0.05m 3 / min, T>100℃, 2L / min<R<6L / min, and the diameter of the water droplets sprayed by the nozzle 20 is D=1mm~2mm, the mist generating system 3 controls the flow rate of the mist entering the simulation chamber 1 to be F'=1.2F~1.4F;

[0076] When G>0.05m 3 / min, T>100℃, R=6L / min, and the diameter of the water droplets sprayed by the nozzle 20 is D=4mm, the fog generating system 3 controls the amount of fog F″=1.6F~2F entering the simulation chamber 1 to offset the dissipation of fog caused by the dragging effect of raindrops.

[0077] When the output flow of the air flow control system is greater than 0.05m 3 / min, when the air flow temperature in the simulation chamber 1 is greater than 100°C, the regulation of the fog generation system will be drastically weakened, and the regulation of the rain generation system will also be weakened accordingly, because the fog will evaporate in large quantities, forming a large amount of hot steam, and losing the effect of the fog. Because the simulation chamber 1 takes into account the need for air intake and fog, to prevent the situation of excessive pressure in the simulation chamber 1, it is not sealed, but there is a breathable gap to allow gas and fog to escape. When hot steam is generated, there is a breathable gap to dissipate, which improves the reliability and availability of the experimental environment and reduces the impact on the experiment. Therefore, the present invention can be closer to a natural fog environment. The present invention generates dense fog while having a breathable gap to allow the fog to dissipate slowly. The factors affecting the fog concentration in the simulation chamber 1 of the present invention mainly include the influence of the high-temperature gas mentioned above, the natural dissipation from the breathable gap, and the dissipation caused by falling into the water surface in the lower part of the simulation chamber 1. In addition, raindrops will also drag the fog droplets, causing the suspended fog droplets to settle quickly, so that the fog dissipates quickly. In order to ensure the concentration of fog in the experiment, on the basis of the original output of the fog generating system, the fog flow adjustment knob makes the output of the fog generating system according to the size of the rainfall and the size of the raindrop particle size, so as to ensure that the fog concentration meets the requirements of the experiment. When the output flow of the rain generating system is 2L / min<R<6L / min, and the diameter range of the raindrops sprayed by the nozzle 20 (the aperture size of the nozzle) is 1mm~2mm, the fog needs to maintain the original concentration, and the fog flow needs to be increased by 20%~40% on the basis of the original output to offset the dissipation of fog caused by the drag effect of raindrops. When the output flow of the rain generating system reaches the maximum of 6L, and the diameter range of the raindrops sprayed by the nozzle 20 (the aperture size of the nozzle) is adjusted to the maximum of 4mm, the fog generating system needs to increase the fog flow by 60%~100% on the basis of the original output to offset the dissipation of fog caused by the drag effect of raindrops.

[0078] During the design, the fog generation system can produce fog concentration far beyond the range of these influences, so it can meet the control needs in the experiment. During the experiment, it is necessary to coordinate and control the output of related systems to ensure the effect of the experiment.

[0079] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An experimental system for simulating complex weather environments for imaging detection, characterized in that: It includes a simulation chamber, a rain generating system, a fog generating system and an airflow control system, among which: Infrared-transmitting glass is installed on two opposite side walls of the simulation chamber, respectively, and wipers are installed at positions corresponding to the infrared-transmitting glass of the simulation chamber. A rain hole is provided on the top of the simulation chamber, and a water outlet is provided on the side wall of the simulation chamber; The rain generating system comprises a rain generating main unit, a water outlet pipe and a water inlet pipe, wherein the water outlet pipe and the water inlet pipe are respectively connected to the rain generating main unit, and a nozzle is arranged on the water outlet pipe, and the nozzle is arranged at the rain hole on the top of the simulation chamber to allow water droplets to enter the simulation chamber, and the water inlet pipe is connected to the water outlet on the simulation chamber to allow water to circulate between the simulation chamber and the rain generating main unit; The mist generating system comprises a water tank and an ultrasonic atomizing generator, wherein the inlet of the ultrasonic atomizing generator is connected to the water tank, and the outlet of the ultrasonic atomizing generator is connected to the simulation chamber through a mist guiding pipe, so as to guide the mist into the simulation chamber; The airflow control system includes a shell, an air pipe and a valve. The air pipe is installed on the shell. The air inlet of the air pipe is connected to the air source and the air outlet is connected to the simulation chamber to introduce the airflow into the simulation chamber. The valve is installed on the air pipe.

2. The experimental system for simulating complex weather environment for imaging detection according to claim 1, characterized in that: The mist generating system further comprises a fan arranged in the water tank for blowing the generated mist toward the mist guiding pipe.

3. The experimental system for simulating complex weather environment for imaging detection according to claim 1, characterized in that: The air flow control system further comprises a gas temperature control module for controlling the gas temperature at the gas outlet of the gas pipe.

4. The experimental system for simulating complex weather environment for imaging detection according to claim 1, characterized in that: The airflow regulation system further comprises a gas flow control module, which is mounted on the air pipe, and the valve is located between the gas flow control module and the air inlet of the air pipe.

5. The experimental system for simulating complex weather environment for imaging detection according to claim 1, characterized in that: The airflow control system also includes a gas temperature control module and a gas flow control module. The gas temperature control module is used to control the gas temperature at the air outlet of the air pipe. The valve is located between the gas flow control module and the air inlet of the air pipe. The airflow control system also includes a gas output analysis module to obtain the flow and temperature of the current output gas and feed it back to the control system, so that the control system can control the gas temperature and flow through the gas temperature control module and the gas flow control module, thereby realizing closed-loop control.

6. The experimental system for simulating complex weather environment for imaging detection according to claim 1, characterized in that: The rain generating main unit has a rain flow regulating knob for regulating the water flow of the nozzle; the ultrasonic atomizing generator has a mist volume regulating knob for regulating the mist flow.

7. The experimental system for simulating complex weather environment for imaging detection according to claim 1, characterized in that: The simulation chamber has a breathable gap to connect the inside and outside of the simulation chamber.

8. The experimental method of the environmental experimental system simulating complex weather according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) The internal volume of the simulation warehouse is 100L~150L; A non-self-luminous target is placed at a position corresponding to the infrared-transmitting glass in the simulation chamber, and then a light source and an imaging detector are arranged at positions corresponding to the target outside the simulation chamber, and the light source and the imaging detector are located on the same side of the simulation chamber. The light source emits light to illuminate the target, and the target reflects the light, so that the imaging detector performs imaging detection on the target; Alternatively, a self-luminous target is placed at a position corresponding to the infrared-transmitting glass in the simulation chamber, and then an imaging detector is arranged at a position corresponding to the target outside the simulation chamber, so that the imaging detector performs imaging detection on the target; Alternatively, a light source and a beam quality analyzer are arranged at positions corresponding to the infrared-transmitting glass of the simulation chamber, and the simulation chamber is between the light source and the beam quality analyzer. The light emitted by the light source passes through the infrared-transmitting glass and enters the beam quality analyzer, so as to observe the influence of different weather environments on the beam quality through the beam quality analyzer. 2) Initially, the temperature in the simulation chamber is T = room temperature ~ 100 °C, and: The air flow is formed by introducing gas into the simulation chamber through the air flow control system, and the flow rate of the air flow in the simulation chamber is G=0.01m 3 / min ~0.05m 3 / min; The rain generating system sprays water droplets into the simulation chamber to simulate rainfall, and the flow rate of rain in the simulation chamber is R=0.5 L / min~2L / min; The fog is introduced into the simulation chamber through the fog generating system, and the flow rate of the fog in the simulation chamber is F=0.1 L / h ~0.3L / h; 3) When 0.05 m 3 / min<G≤0.1m 3 / min, T>100℃, 2L / min<R<6L / min, and the diameter of the water droplets sprayed by the nozzle is D=1mm~2mm, the fog generation system controls the flow rate of the fog entering the simulation chamber to F'=1.2F~1.4F to offset the dissipation of the fog caused by evaporation; 4) When 0.05 m 3 / min<G≤0.1m 3 / min, T>100℃, R=6L / min, and the diameter of the water droplets sprayed by the nozzle is D=4mm, the fog generating system controls the amount of fog entering the simulation chamber to be F''=1.6F~2F to offset the dissipation of fog caused by the dragging effect of raindrops.

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