Vacuum environment shadowless lighting system
By using a vacuum environment shadowless lighting system in a vacuum environment, uniform illumination of the feather moon dust action area is achieved using spotlight arrays and refractive lenses, the problem of scattered light and shadow interference of moon dust is solved, and the reliability of the experiment is improved and repeatability.
Patent Information
- Application Number
- CN202411741368.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-02-07
AI Technical Summary
When conducting a simulation evolution experiment on the lunar erosion pit under vacuum, the scattered light of the lunar dust interferes with the imaging of the lunar surface, reduces visibility, and lighting directly from above the engine will form shadows that are difficult to eliminate, affecting the experimental results.
A vacuum ambient shadowless lighting system is adopted, which consists of an outer edge spotlight array and an integrated nozzle bracket light source, provides power supply through the spotlight array power rail, and adjusts the refractive light with refraction lens and lens angle adjustment knob Direction and illuminated area for uniform lighting and avoid shadows.
It realizes uniform illumination of the mound dust action area of the engine plume under vacuum environment, reduces scattered light interference, avoids shadow formation, and improves the reliability and repeatability of experimental results.
Smart Images
Figure CN119393713A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of shadowless lighting, in particular to a vacuum environment shadowless lighting system. Background Art
[0002] In the lunar crater simulation evolution experiment, a visible light camera is usually used to record the dynamic process of crater formation in real time when the engine is working. After the experiment, the depth and size of the crater are obtained by post-processing the crater image. However, when the plume interacts with the lunar dust, a large amount of lunar dust exists in the field of view, which significantly reduces the signal-to-noise ratio of the image. The main reason is that the evolution process of lunar erosion is extremely rapid, and a high-speed camera is required to observe at a frequency of more than 1,000 frames per second. Since the exposure time of a high-speed camera is less than 1 millisecond, the field of view must have a very high light intensity to ensure that the simulated lunar surface has sufficient imaging brightness. In industrial applications, spotlights arranged in a ring array are usually used. By adjusting the spacing and angles of the spotlights, a shadowless illumination light field in a specific area is achieved. In the circumferential area of the engine, the flow state of the plume field is easily affected by the vacuum back pressure and the wall surface, and the spotlight array is large. Therefore, in order to avoid interference with the rarefied flow field generated by the engine in a vacuum environment, a certain amount of free expansion space for the plume field is reserved, which results in a long distance between the installation position of the side spotlight and the target illumination area.
[0003] In this case, a large amount of lunar dust diffused in space is illuminated, forming strong scattered light. However, this lunar dust is not the target of the shooting. The real object of the shooting is the lunar surface located below the engine. Therefore, the scattered light of the lunar dust in space interferes with the imaging of the lunar surface and reduces the visibility of the lunar surface. In addition, due to the existence of the nozzle and its bracket, direct lighting from above the engine will form a shadow that is difficult to eliminate on the lunar soil surface, and this area is the core area of experimental research. This shadow effect has a significant impact on the analysis and processing of the experimental results, so a shadowless lighting device that can be used in a vacuum environment is needed to ensure the progress of the experiment.
[0004] It is necessary to make the lighting device evenly illuminate the area where the plume and lunar dust act directly below the nozzle to avoid strong light spots or shadows, and adjust the corresponding lighting area according to the plume action range of the engine at different working heights, and reduce the scattered light intensity generated by the diffuse lunar dust in the space to avoid the formation of redundant structures around the nozzle, thereby reducing the impact on the convection field. Summary of the invention
[0005] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a vacuum environment shadowless lighting system, which is composed of a spotlight light source array to form an outer edge lighting, and a surface light source and an adjustable angle transmission mirror assembled on an integrated nozzle bracket to form an inner ring lighting. The outer edge lighting and the inner ring lighting are independently regulated by control equipment outside the vacuum chamber, so as to achieve precise control of the lighting intensity of different flow field action areas, and provide power supply for the entire system through a spotlight array power rail, simplifying the cable connection, and allowing the spotlight array group to move and adjust in the rail according to the change of the measurement position, ensuring that the system can be quickly and conveniently adjusted according to specific needs, and the experimental nozzle is firmly connected to the structural frame through the nozzle fixing flange to ensure that the experimental nozzle remains fixed during operation, avoiding In order to avoid position displacement due to vibration or other factors, an independent lens angle adjustment knob is provided on each set of refracting lenses. After rotating the lens angle adjustment knob, the angle of the refracting lens can be changed independently, thereby changing the refraction direction and irradiation area of the light. When the height of the experimental nozzle changes, the adjustment knob can quickly adjust the refraction position of the light to ensure that the illumination area always covers the range of the experimental nozzle flow field, so that the system can be flexibly adjusted under different working conditions to meet the needs of different experiments and shooting. Moreover, by filling the simulated lunar dust inside the simulated lunar soil storage device and compacting it according to a specific compactness, the repeatability of the experiment and the reliability of the results are ensured. At this time, the plume generated by the experimental nozzle acts on the simulated lunar dust surface, simulating the dust reaction in the real lunar environment.
[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a vacuum environment shadowless lighting system, comprising an outer edge spotlight array lighting system, an integrated nozzle bracket light source system is arranged at the bottom of the outer edge spotlight array lighting system, an experimental nozzle is arranged inside the integrated nozzle bracket light source system, and a simulated lunar soil storage is arranged at the bottom of the experimental nozzle;
[0007] The outer edge spotlight array lighting system includes a spotlight array bracket, a spotlight array group and a spotlight array power rail. The spotlight array bracket is arranged at the top end of the experimental nozzle. The spotlight array power rail is fixed to the bottom end of the spotlight array bracket, and the spotlight array group is arranged inside the spotlight array power rail. Preferably, the spotlight array bracket is in the shape of a square surround structure, and the spotlight array power rail is provided with a plurality of groups, and the spotlight array power rails are distributed at equal intervals about the central axis of the spotlight array bracket. Preferably, the spotlight array group includes high-efficiency spotlights and a connecting base plate, and the connecting base plate is slidably connected to the inner wall of the spotlight array power rail, and the high-efficiency spotlights are rotatably connected to the bottom end of the connecting base plate. Preferably, the high-efficiency spotlights are provided with a plurality of groups, and the high-efficiency spotlights are symmetrically distributed about the central axis of the connecting base plate.
[0008] Preferably, the integrated nozzle bracket light source system includes a structural frame, a nozzle fixing flange, an annular surface light source, a refracting lens and a lens angle adjustment knob, the structural frame is arranged at the bottom end of the spotlight array bracket, the nozzle fixing flange is installed inside the structural frame, the annular surface light source is installed at the top of the structural frame, the refracting lens is installed at the bottom end of the structural frame, and the top of the refracting lens is provided with a lens angle adjustment knob.
[0009] Preferably, a through hole is provided inside the nozzle fixing flange, and the diameter of the through hole is smaller than the diameter of the annular surface light source.
[0010] Preferably, the refractive lenses are arranged in a plurality of groups, and the refractive lenses are distributed at equal intervals about the central axis of the nozzle fixing flange.
[0011] Preferably, the lens angle adjustment knobs are provided in a plurality of groups, and the lens angle adjustment knobs are distributed at equal intervals about the central axis of the nozzle fixing flange.
[0012] Preferably, the inner diameter of the nozzle fixing flange is equal to the outer diameter of the experimental nozzle, the top end of the experimental nozzle is connected to the gas cylinder outside the vacuum chamber through a delivery pipeline, and the outer diameter of the structural frame is smaller than the inner diameter of the spotlight array bracket.
[0013] Preferably, the simulated lunar soil storage is square in shape, and the interior of the simulated lunar soil storage is filled with simulated lunar dust.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] The present invention arranges the coordination of structures such as the spotlight array bracket, the spotlight array group, and the spotlight array power rail, so that the device can provide power supply to the entire system through the spotlight array power rail, simplifies cable connection, and allows the spotlight array group to move and adjust in the rail according to changes in the measurement position, ensuring that the system can be quickly and conveniently adjusted according to specific needs.
[0016] The present invention sets a structural frame, a nozzle fixing flange, an annular surface light source and other structures, so that the device can firmly connect the experimental nozzle to the structural frame through the nozzle fixing flange to ensure that the experimental nozzle remains fixed during operation and avoids position displacement due to vibration or other factors. The annular design of the annular surface light source not only provides a large area of lighting coverage, but also avoids the shadow and light spot problems that may occur in traditional point light sources, thereby providing a more uniform lighting effect. By equipping each group of refracting lenses with an independent lens angle adjustment knob, the angle of the refracting lens can be independently changed after rotating the lens angle adjustment knob, and the refraction direction and irradiation area of the light can be changed. When the height of the experimental nozzle changes, the adjustment knob can quickly adjust the refraction position of the light to ensure that the illumination area always covers the range of action of the experimental nozzle flow field, so that the system can be flexibly adjusted under different working conditions to meet the needs of different experiments and shooting.
[0017] The present invention arranges the cooperation of structures such as the experimental nozzle and the simulated lunar soil storage device so that during the experiment, the gas in the device is accelerated through the experimental nozzle, and the jet rapidly expands in a vacuum environment, thereby simulating the plume field distribution under real conditions, and fills the interior of the simulated lunar soil storage device with simulated lunar dust, which is compacted according to a specific compactness to ensure the repeatability of the experiment and the reliability of the results. At this time, the plume generated by the experimental nozzle acts on the surface of the simulated lunar dust, simulating the dust reaction in the real lunar environment, so that the device can record the illumination intensity of the device in different flow field action areas in the laboratory by filling the interior of the simulated lunar soil storage device with lunar dust of different compactness. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0019] Figure 2 is a schematic diagram of an edge lighting system of the present invention;
[0020] Figure 3 It is a schematic diagram of the inner circle lighting system of the present invention;
[0021] Figure 4 It is a bottom view schematic diagram of the inner ring lighting system of the present invention.
[0022] In the figure: 1. Outer edge spotlight array lighting system; 101. Spotlight array bracket; 102. Spotlight array group; 103. Spotlight array power rail; 2. Integrated nozzle bracket light source system; 201. Structural frame; 202. Nozzle fixing flange; 203. Annular surface light source; 204. Refractive lens; 205. Lens angle adjustment knob; 3. Experimental nozzle; 4. Simulated lunar soil storage device. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] like Figures 1 to 4 As shown, the present invention provides a vacuum environment shadowless lighting system, including an edge spotlight array lighting system 1, an integrated nozzle bracket light source system 2 is arranged at the bottom of the edge spotlight array lighting system 1, an experimental nozzle 3 is arranged inside the integrated nozzle bracket light source system 2, and a simulated lunar soil storage 4 is arranged at the bottom of the experimental nozzle 3. The simulated lunar soil storage 4 is square in shape, and the interior of the simulated lunar soil storage 4 is filled with simulated lunar dust.
[0025] The above scheme is adopted: during the experiment, the gas can be accelerated through the experimental nozzle 3 through the device, and the jet quickly expands in a vacuum environment, thereby simulating the plume field distribution under real conditions, and the simulated lunar dust is filled inside the simulated lunar soil storage 4 and compacted according to a specific compactness to ensure the repeatability of the experiment and the reliability of the results. At this time, the plume generated by the experimental nozzle 3 acts on the surface of the simulated lunar dust, simulating the dust reaction in the real lunar environment.
[0026] like Figures 1 to 4 As shown, the outer edge spotlight array lighting system 1 includes a spotlight array bracket 101, a spotlight array group 102 and a spotlight array power rail 103. The spotlight array bracket 101 is arranged at the top end of the experimental nozzle 3. The spotlight array power rail 103 is fixed to the bottom end of the spotlight array bracket 101. The spotlight array group 102 is arranged inside the spotlight array power rail 103. The spotlight array bracket 101 is shaped like a square surrounding structure. The spotlight array power rail 103 is provided with a plurality of groups. The spotlight array power rails 103 are evenly spaced about the central axis of the spotlight array bracket 101.
[0027] like Figures 1 to 4As shown, the spotlight array group 102 includes high-efficiency spotlights and a connecting base plate. The connecting base plate is slidably connected to the inner wall of the spotlight array power rail 103, and the high-efficiency spotlights are rotatably connected to the bottom end of the connecting base plate. Several groups of high-efficiency spotlights are arranged, and the high-efficiency spotlights are symmetrically distributed about the central axis of the connecting base plate. The above scheme is adopted: the power supply for the entire system is provided by the spotlight array power rail 103, which simplifies the cable connection and allows the spotlight array group 102 to move and adjust in the rail according to the change of the measurement position, ensuring that the system can be quickly and conveniently adjusted according to specific needs. When using a high-speed camera to capture images, if the light source is an LED lamp, stroboscopic phenomenon may be encountered. This stroboscopic phenomenon mainly depends on the driving method of the LED lamp. LED lamps driven by a DC power supply usually do not have stroboscopic problems, while LED lamps driven by an AC power supply may produce stroboscopic problems during shooting. If the shooting frame rate of the high-speed camera does not match the stroboscopic frequency of the LED lamp, stripes or fluctuations of light and dark changes may appear in the captured image. To solve this problem, an external synchronization controller can be used to synchronize the switching frequency of the LED lamp with the frame rate of the camera to ensure the stability of the light source during exposure.
[0028] like Figures 1 to 4 As shown, the integrated nozzle bracket light source system 2 includes a structural frame 201, a nozzle fixing flange 202, an annular surface light source 203, a refractive lens 204 and a lens angle adjustment knob 205. The structural frame 201 is arranged at the bottom end of the spotlight array bracket 101. The nozzle fixing flange 202 is installed inside the structural frame 201. The inner diameter of the nozzle fixing flange 202 is equal to the outer diameter of the experimental nozzle 3. The top of the experimental nozzle 3 is connected to the gas cylinder outside the vacuum chamber through a conveying pipeline. The outer diameter of the structural frame 201 is smaller than the inner diameter of the spotlight array bracket 101. A through hole is opened inside the nozzle fixing flange 202. The diameter of the through hole is smaller than the diameter of the annular surface light source 203.
[0029] like Figures 1 to 4 As shown, a ring-shaped surface light source 203 is installed at the top of the structural frame 201, and a refractive lens 204 is installed at the bottom of the structural frame 201. The refractive lens 204 is provided in several groups, and the refractive lenses 204 are evenly spaced about the central axis of the nozzle fixing flange 202. The top of the refractive lens 204 is provided with a lens angle adjustment knob 205, and the lens angle adjustment knob 205 is provided in several groups. The lens angle adjustment knob 205 is evenly spaced about the central axis of the nozzle fixing flange 202.
[0030] The above scheme is adopted: the structural frame 201 can provide a stable installation platform, and the nozzle fixing flange 202 firmly connects the experimental nozzle 3 to the structural frame 201 to ensure that the experimental nozzle 3 remains fixed during operation to avoid position displacement due to vibration or other factors. The annular design of the annular surface light source 203 not only provides a large area of lighting coverage, but also avoids the shadow and light spot problems that may occur in traditional point light sources, and ensures that the light can evenly cover a wide area below the experimental nozzle 3, thereby providing a more uniform lighting effect. By refraction of light, the light energy of the surface light source can be effectively concentrated to the area that needs to be illuminated, thereby improving the lighting efficiency and lighting effect. By equipping each group of refractive lenses 204 with an independent lens angle adjustment knob 205, and rotating the lens angle adjustment knob 205, the angle of the refractive lens 204 can be independently changed to change the refraction direction and irradiation area of the light. When the height of the experimental nozzle 3 changes, the adjustment knob can quickly adjust the refraction position of the light to ensure that the illumination area always covers the range of action of the flow field of the experimental nozzle 3, so that the system can be flexibly adjusted under different working conditions to meet the needs of different experiments and shooting.
[0031] The working principle and use process of the present invention are as follows: during the experiment, the gas can be accelerated through the experimental nozzle 3, and the jet can expand rapidly in a vacuum environment, thereby simulating the plume field distribution under real conditions, and the simulated lunar dust is filled in the simulated lunar soil storage 4, and compacted according to a specific compactness to ensure the repeatability of the experiment and the reliability of the results. At this time, the plume generated by the experimental nozzle 3 acts on the surface of the simulated lunar dust, simulating the dust reaction in the real lunar environment, and the power supply for the entire system is provided through the spotlight array power rail 103, which simplifies the cable connection and allows the spotlight array group 102 to be adjusted according to the measurement position. The system can be moved and adjusted in the rails according to the changes, ensuring that the system can be quickly and easily adjusted according to specific needs. When using a high-speed camera to capture images, if the light source is an LED lamp, you may encounter stroboscopic phenomena. This stroboscopic phenomenon mainly depends on the driving method of the LED lamp. LED lamps driven by DC power supply usually do not have stroboscopic problems, while LED lamps driven by AC power supply may produce stroboscopic problems during shooting. If the shooting frame rate of the high-speed camera does not match the stroboscopic frequency of the LED lamp, stripes or fluctuations of light and dark changes may appear in the captured image. To solve this problem, an external synchronization controller can be used To synchronize the switching frequency of the LED light with the frame rate of the camera, ensure the stability of the light source during exposure, and provide a stable installation platform through the structural frame 201. The nozzle fixing flange 202 firmly connects the experimental nozzle 3 to the structural frame 201 to ensure that the experimental nozzle 3 remains fixed during operation to avoid position displacement due to vibration or other factors. The annular design of the annular surface light source 203 not only provides a large area of lighting coverage, but also avoids the shadow and light spot problems that may occur in traditional point light sources, and ensures that the light can evenly cover a wide area under the experimental nozzle 3, thereby providing more uniform lighting. Effect, by refraction of light, the light energy of the surface light source can be effectively concentrated to the area that needs to be illuminated, thereby improving the lighting efficiency and lighting effect, by equipping each set of refractive lenses 204 with an independent lens angle adjustment knob 205, and by rotating the lens angle adjustment knob 205, the angle of the refractive lens 204 can be independently changed to change the refraction direction and irradiation area of the light, when the height of the experimental nozzle 3 changes, the adjustment knob can quickly adjust the refraction position of the light to ensure that the illumination area always covers the range of action of the flow field of the experimental nozzle 3, so that the system can be flexibly adjusted under different working conditions to meet the needs of different experiments and shooting. It should be noted that in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A vacuum environment shadowless lighting system, comprising an edge spotlight array lighting system (1), characterized in that: An integrated nozzle support light source system (2) is arranged at the bottom of the outer edge spotlight array lighting system (1), an experimental nozzle (3) is arranged inside the integrated nozzle support light source system (2), and a simulated lunar soil storage (4) is arranged at the bottom of the experimental nozzle (3); The outer edge spotlight array lighting system (1) comprises a spotlight array bracket (101), a spotlight array group (102) and a spotlight array power rail (103); the spotlight array bracket (101) is arranged at the top end of the experimental nozzle (3); the spotlight array power rail (103) is fixed to the bottom end of the spotlight array bracket (101); and the spotlight array group (102) is arranged inside the spotlight array power rail (103).
2. The vacuum environment shadowless lighting system according to claim 1, characterized in that: The spotlight array support (101) is in the shape of a square surrounding structure, and a plurality of spotlight array power rails (103) are provided, and the spotlight array power rails (103) are distributed at equal intervals about the central axis of the spotlight array support (101).
3. The vacuum environment shadowless lighting system according to claim 1, characterized in that: The spotlight array group (102) comprises high-efficiency spotlights and a connecting base plate, wherein the connecting base plate is slidably connected to the inner wall of the spotlight array power supply rail (103), and the high-efficiency spotlights are rotatably connected to the bottom end of the connecting base plate.
4. The vacuum environment shadowless lighting system according to claim 3, characterized in that: The high-efficiency spotlights are arranged in a plurality of groups, and the high-efficiency spotlights are symmetrically distributed about a central axis connected to the bottom plate.
5. The vacuum environment shadowless lighting system according to claim 1, characterized in that: The integrated nozzle support light source system (2) comprises a structural frame (201), a nozzle fixing flange (202), an annular surface light source (203), a refractive lens (204) and a lens angle adjustment knob (205); the structural frame (201) is arranged at the bottom end of the spotlight array support (101); the nozzle fixing flange (202) is installed inside the structural frame (201); the annular surface light source (203) is installed at the top end of the structural frame (201); the refractive lens (204) is installed at the bottom end of the structural frame (201); and the lens angle adjustment knob (205) is arranged at the top end of the refractive lens (204).
6. The vacuum environment shadowless lighting system according to claim 5, characterized in that: A through hole is provided inside the nozzle fixing flange (202), and the diameter of the through hole is smaller than the diameter of the annular surface light source (203).
7. The vacuum environment shadowless lighting system according to claim 5, characterized in that: The refractive lenses (204) are arranged in a plurality of groups, and the refractive lenses (204) are distributed at equal intervals about the central axis of the nozzle fixing flange (202).
8. The vacuum environment shadowless lighting system according to claim 5, characterized in that: The lens angle adjustment knobs (205) are provided in a plurality of groups, and the lens angle adjustment knobs (205) are distributed at equal intervals about the central axis of the nozzle fixing flange (202).
9. The vacuum environment shadowless lighting system according to claim 5, characterized in that: The inner diameter of the nozzle fixing flange (202) is equal to the outer diameter of the experimental nozzle (3), the top end of the experimental nozzle (3) is connected to the gas cylinder outside the vacuum chamber through a delivery pipeline, and the outer diameter of the structural frame (201) is smaller than the inner diameter of the spotlight array bracket (101).
10. The vacuum environment shadowless lighting system according to claim 1, characterized in that: The simulated lunar soil storage (4) is square in shape, and the interior of the simulated lunar soil storage (4) is filled with simulated lunar dust.