Observation system applied in sealed experiment cavity

Abstract

The invention discloses an observation system applied to a sealed experiment cavity, the observation system comprises an observation window arranged above and / or on the side of the experiment cavity and observation equipment arranged outside the experiment cavity, the observation window is used for installing observation glass, and the observation equipment observes an experiment module in the experiment cavity through the observation glass and obtains image data; the arrangement position of the observation window is selected according to the experiment plane where the experiment module in the experiment cavity is located. The thickness of the sealing ring between the observation window and the observation glass is larger than the depth of the sealing groove, so that the circular boss on the experiment cavity is prevented from being in direct contact with the mirror surface of the observation window glass after being pressed. Through mutual cooperation of the closed observation window and observation equipment outside the experiment cavity, all experiment phenomena in the experiment cavity can be monitored from an optical angle, and meanwhile, the observation requirement for all experiment phenomena in a space science experiment and the safety requirement for preventing an experiment working medium from leaking into a cabin in the space are met.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to an observation system used in a sealed experimental chamber. Background Art

[0002] With the development of my country's aerospace technology, a large number of space science payload development tasks have followed. The biggest difference between space science experiments and ground science experiments is that the two are in different environments. Under microgravity conditions, the buoyancy convection, gravity sedimentation, liquid pressure gradient and other phenomena in the fluid caused by the original ground gravity effect basically disappear, and some secondary effects masked by the ground gravity effect become prominent. The fluid morphology and physical and chemical processes undergo significant changes, which will affect the flow and heat transfer mechanisms, related material processing and preparation processes. At the same time, since some basic physics experimental conditions are no longer affected by gravity, experiments can be carried out with higher indicators and precision, and important basic physics theories can be verified.

[0003] The above experiments require a closed experimental environment, and the entire experimental process must be recorded in detail. At the same time, in order to meet the space requirements on the space station, the design of the experimental equipment has spatial requirements and requires a higher volume ratio. Therefore, it is necessary to adopt modular processing of the experimental cavity, set up multiple experimental cavities for different experiments, and observe and record the experimental process inside each experimental cavity through external observation settings.

[0004] Therefore, an observation window needs to be set on the wall of the experimental chamber so that external observation equipment can observe and record the experimental process inside the experimental chamber; in the existing technology, optical window observation components are mainly used in ground experiments and cannot be applied to the sealed environment required for space experiments; and cannot meet the requirements of multi-channel and multi-type optical observations. Summary of the Invention

[0005] The purpose of the present invention is to provide an observation system for use in a sealed experimental chamber to ensure the sealing of the entire experimental chamber, prevent the gas and liquid working media in the experimental chamber from leaking into the external environment of the experimental device, and at the same time rationally arrange the observation windows to meet multi-channel and multi-type optical observations, thereby solving the technical problems existing in the prior art.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] An observation system for use in a sealed experimental chamber, comprising an observation window arranged above and / or to the side of the experimental chamber and an observation device arranged outside the experimental chamber, wherein the observation window is used to install an observation glass, and the observation device observes an experimental module inside the experimental chamber through the observation glass and obtains image data; the setting position of the observation window is selected according to the experimental plane where the experimental module in the experimental chamber is located; a sealed installation structure is formed between the observation window and the observation glass to ensure the sealing of the entire experimental chamber.

[0008] Furthermore, the observation window is a cylindrical countersunk hole opened on the wall of the experimental chamber, and the observation glass can be stuck in the large hole of the cylindrical countersunk hole. A cover plate is provided on the outside of the experimental chamber corresponding to the position of the observation window, and the cover plate can apply pressure to the observation glass to ensure the sealing between the observation glass and the observation window; and the cover plate has a through hole corresponding to the position of the observation glass, so that the observation equipment can obtain image data of the experimental module inside the experimental chamber through the observation glass.

[0009] Furthermore, the observation glass is a circular glass, and the diameter of the observation glass is consistent with the aperture of the large hole.

[0010] Furthermore, a circular boss is provided on the side of the cover plate facing the observation glass, and the diameter of the circular boss is consistent with the aperture of the large hole, so that the circular boss can be stuck in the large hole, and the through hole extends toward the circular boss and passes through the circular boss; the height of the circular boss is consistent with the hole depth of the large hole, and the cover plate and the cavity wall of the experimental cavity are fixed by bolts, and by tightening the bolts, the circular boss can apply pressure to the observation glass.

[0011] Furthermore, a first groove is provided along the edge of the surface of the large hole that contacts the mirror surface of the observation glass, and a second groove is provided along the edge of the surface of the circular boss that contacts the mirror surface of the observation glass. Sealing rings are built into the first groove and the second groove; and the thickness of the sealing ring is greater than the depth of the first groove and the second groove, so that when the circular boss applies pressure to the observation glass, the large hole and the circular boss do not contact the mirror surface of the observation glass.

[0012] Furthermore, when the experimental plane where the experimental module in the experimental chamber is located is parallel to the horizontal plane, the observation windows are provided with at least two groups, which are respectively located on the top plate and the side plate of the experimental chamber; and a background light source is provided inside the experimental chamber at a position facing the observation windows located on the side plate of the experimental chamber.

[0013] Furthermore, when the experimental plane where the experimental module in the experimental chamber is located is perpendicular to the horizontal plane, at least one group of observation windows is provided, which is located on the top plate of the experimental chamber; a reflector is provided inside the experimental chamber for reflecting the image of the experimental module into the lens of the observation device arranged on the top of the experimental chamber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The observation system provided by the present invention is applied to a sealed experimental chamber. Through the cooperation between the sealed observation window and the observation equipment outside the experimental chamber, all experimental phenomena inside the experimental chamber can be monitored from an optical perspective, meeting the observation requirements of all experimental phenomena in space science experiments. The sealed multifunctional observation window has a simple structure and low manufacturing cost, and has strong sealing and pressure resistance, and realizes multi-angle observation through reasonable layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0017] Figure 1 This is a schematic diagram of the structure of the observation window set on the sealed experimental chamber;

[0018] Figure 2 This is an exploded view of the assembly at the observation window;

[0019] Figure 3 It is a partial cross-sectional view of the observation window;

[0020] Figure 4 This is a schematic diagram of the structure of the entire observation system when the experimental plane where the experimental module is located in the experimental chamber is parallel to the horizontal plane;

[0021] Figure 5 This is a structural diagram of the entire observation system when the experimental plane where the experimental module is located in the experimental chamber is perpendicular to the horizontal plane.

[0022] The numbers in the figure represent the following:

[0023] 1-Experimental chamber, 2-Observation window, 3-Cylindrical countersunk hole, 31-Large hole, 32-Small hole, 4-Cavity wall, 5-Observation glass, 6-Cover, 7-Through hole, 8-Circular boss, 9-Bolt, 10-First groove, 11-Second groove, 12-Sealing ring, 13-Top plate, 14-Side plate, 15-Reflector, 17-Experimental module, 18-Temperature sensor. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0025] The present invention provides a specific embodiment of an observation system applied in a sealed experimental chamber, including an observation window 2 arranged on the cavity wall 4 of the experimental chamber 1, and an observation device (not marked in the figure) arranged outside the experimental chamber 1 corresponding to the observation window 2. The observation device is an existing conventional optical observation device. Therefore, this application does not limit the specific structure of the observation device.

[0026] Among them, the position of the observation window 2 can be above the experimental chamber 1, or be set on the side of the experimental chamber 1, or be set at the same time above and on the side of the experimental chamber 1; specifically, the setting of the position of the observation window 2 needs to be selected according to the experimental plane where the experimental module 17 in the experimental chamber 1 is located.

[0027] The observation window 2 is used to install the observation glass 5. The observation equipment observes the experimental module 17 inside the experimental chamber 1 through the observation glass 5 and obtains image data. The observation window 2 and the observation glass 5 are sealed to ensure the sealing of the entire experimental chamber 1.

[0028] This embodiment provides the following embodiments for the sealing structure between the observation window 2 and the observation glass 5, such as Figure 2 and Figure 3 As shown:

[0029] The observation window 2 is a cylindrical countersunk hole 3 opened on the wall 4 of the experimental chamber 1. The observation glass 5 can be stuck in the large hole 31 of the cylindrical countersunk hole 3. A cover plate 6 is provided on the outside of the experimental chamber 1 at the position corresponding to the observation window 2. The cover plate 6 can apply pressure to the observation glass 5 to ensure the sealing between the observation glass 5 and the observation window 2.

[0030] A through hole 7 is formed on the cover plate 6 at a position corresponding to the observation glass 5, so that the observation equipment can obtain image data of the experimental module 17 inside the experimental chamber 1 through the observation glass 5; the diameter of the through hole 7 is greater than or equal to the diameter of the small hole 32 of the cylindrical countersunk hole 3, and the two are coaxially arranged, thereby avoiding the size of the through hole 7 from blocking the field of view at the observation window 2.

[0031] The observation glass 5 is a circular glass, and the diameter of the observation glass 5 is consistent with the aperture of the large hole 31, so that the observation glass 5 can be stuck in the large hole 31 of the cylindrical countersunk hole 3, preventing the observation glass 5 from moving relative to the observation window 2, thereby ensuring the stability of the observation glass 5 during the observation process.

[0032] Furthermore, a circular boss 8 is provided on the side of the cover plate 6 facing the observation glass 5. The diameter of the circular boss 8 is consistent with the aperture of the large hole 31, so that the circular boss 8 can be stuck in the large hole 31 and apply pressure to the observation glass 5; the through hole 7 on the cover plate 6 extends toward the circular boss 8 and passes through the circular boss 8; in order to ensure that there is an effective contact surface between the circular boss 8 and the observation glass 5, the diameter of the through hole 7 is preferably consistent with the diameter of the small hole 32 of the cylindrical countersunk hole 3

[0033] The height of the circular boss 8 is set to be consistent with the depth of the large hole 31. The cover plate 6 and the cavity wall 4 of the experimental cavity 1 are fixed by bolts 9. By tightening the bolts 9, the circular boss 8 can apply pressure to the observation glass 5.

[0034] Specifically, a plurality of threaded holes are provided at equal intervals around the cylindrical countersunk hole 3 on the cavity wall 4, and a plurality of mounting holes are provided at positions corresponding to the threaded holes on the cover plate 6. The mounting holes and the threaded holes correspond one to one, and the bolts 9 pass through the mounting holes and are threadedly connected to the threaded holes.

[0035] The experimental chamber 1, the cover plate 6 and the circular boss 8 are made of metal, and the metal material includes but is not limited to aluminum-magnesium alloy or aluminum alloy. Aluminum-magnesium alloy has the advantages of light weight, high tensile strength, good load-bearing capacity and high dimensional stability. Aluminum alloy has the advantages of light weight, high strength, good corrosion resistance, good processing performance and easy regeneration. The materials that can be selected for the experimental chamber 1, the cover plate 6 and the circular boss 8 include but are not limited to these, and can be adaptively adjusted according to actual conditions, and are not limited here.

[0036] Furthermore, since the observation glass 5 itself has thickness, the relationship between the height of the circular boss 8 is d1, the depth of the large hole 31 is D, and the thickness of the observation glass 5 is d2, is d1+d2=D; so that when the circular boss 8 is against the observation glass 5, the cover plate 6 can just fit with the outer side of the cavity wall 4 of the experimental cavity 1, so as to avoid the circular boss 8 applying excessive pressure on the observation glass 5 during the process of tightening the bolt 9, causing the observation glass 5 to shatter.

[0037] Furthermore, a first groove 10 is provided along the edge of the surface of the cylindrical countersunk hole 3 that contacts the mirror surface of the observation glass 5, and a second groove 11 is provided along the edge of the surface of the circular boss 8 that contacts the mirror surface of the observation glass 5. A sealing ring 12 is built into the first groove 10 and the second groove 11; and the thickness of the sealing ring 12 is greater than the depth of the first groove 10 and the second groove 11, so that the sealing ring 12 can contact the observation glass 5 before the cylindrical countersunk hole 3 and the circular boss 8. The fit between the sealing ring 12 and the observation glass 5 is better than the direct contact between the cylindrical countersunk hole 3 and the circular boss 8 and the observation glass 5, thereby improving the sealing between the observation window 2 and the observation glass 5.

[0038] Moreover, the thickness of the sealing ring 12 can ensure that when the circular boss 8 applies pressure to the observation glass 5, the cylindrical countersunk hole 3 and the circular boss 8 do not contact the mirror surface of the observation glass 5, thereby avoiding direct contact between the cylindrical countersunk hole 3 and the circular boss 8 made of metal and the observation glass 5, thereby avoiding causing the observation glass 5 to break.

[0039] The observation glass 5 is made of glass, and the glass can be optical grade glass such as germanium glass with chemical formula Ge or zinc sulfide glass with chemical formula ZnS. These optical grade glasses have the advantages of good refractive index uniformity and consistency, high transmittance in the mid-infrared band, high hardness, and strong resistance to harsh environments. The materials that can be selected for the observation glass 5 include but are not limited to the above, and can be adaptively adjusted according to actual conditions, and are not limited here. The color of the observation glass 5 can be colorless, red or other colors, and the color of the observation glass 5 can also be adaptively adjusted according to actual conditions, and are not limited here.

[0040] The following is a detailed description of selecting and setting the position of the observation window 2 based on the experimental plane where the experimental module 17 in the experimental chamber 1 is located.

[0041] like Figure 4 As shown, when the experimental plane where the experimental module 17 in the experimental chamber 1 is located is parallel to the horizontal plane, the experimental module 17 is an evaporation table for conducting droplet / liquid layer evaporation phase change heat transfer research, and there are at least two groups of observation windows 2, which are respectively located on the top plate 13 of the experimental chamber 1 and the side plate 14 of the experimental chamber 1.

[0042] Among them, the upper observation window 2 corresponds to the infrared thermal imager, which is used for infrared observation to obtain the heat changes of the droplets and the liquid layer during the evaporation experiment.

[0043] The side observation window 2 corresponds to a high-definition camera CCD or an optical densitometer, which can be used to obtain the morphological changes of droplets and liquid layers during the evaporation experiment.

[0044] Furthermore, the focal length and position of the optical densitometer are fixed. In order to save space, the distance between the optical densitometer and the evaporation table needs to be shortened, resulting in the focal length of the optical densitometer being greater than the distance between the optical densitometer and the evaporation table. Therefore, Figure 4 As shown:

[0045] A reflector 15 is provided inside the experimental chamber 1 , and the lens of the optical densitometer, the experimental module 17 and the reflector 15 are coaxially arranged in sequence so that the focal length of the optical densitometer can fall on the reflector 15 , which is used to shorten the distance between the optical densitometer and the experimental module 17 .

[0046] A background light source can be provided inside the experimental chamber 1 at a position facing the observation window 2 located on the side panel 14 of the experimental chamber 1 to ensure that the light emitted by the background light source can pass through the observation window 2, thereby enhancing the observation effect of the observation window 2.

[0047] like Figure 5 As shown, when the experimental plane where the experimental module 17 in the experimental chamber 1 is located is perpendicular to the horizontal plane, the experimental module 17 is an evaporation table for conducting research on the non-equilibrium effect of the evaporation droplet / liquid layer phase change interface. There is at least one set of observation windows 2 located on the top plate 13 of the experimental chamber 1.

[0048] Because in this experimental state, the entire experimental plane is perpendicular to the horizontal plane, and therefore, the temperature changes of the droplets and the liquid layer are preferably obtained by the temperature sensor 18 on the side. However, due to the placement of the evaporation table, it is impossible to set up an observation device on the side to obtain the morphological changes of the droplets and the liquid layer. The observation device can only be set up above the experimental chamber 1 to obtain the morphological changes of the droplets and the liquid layer.

[0049] Furthermore, as long as the observation equipment can cooperate with the sealed observation window 2 provided in this embodiment to monitor various experimental phenomena inside the experimental chamber 1, the optional observation equipment includes but is not limited to the above-mentioned equipment, which is not limited here.

[0050] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. An observation system used in a sealed experimental chamber, characterized in that: The invention comprises an observation window (2) arranged above and / or on the side of the experimental chamber (1) and an observation device arranged outside the experimental chamber (1), wherein the observation window (2) is used to install an observation glass (5), and a sealed installation structure is formed between the observation window (2) and the observation glass (5) to ensure the sealing of the entire experimental chamber (1), and the observation device observes the experimental module (17) inside the experimental chamber (1) through the observation glass (5) and obtains image data; The setting position of the observation window (2) is selected according to the experimental plane where the experimental module (17) in the experimental chamber (1) is located.

2. The observation system for use in a sealed experimental chamber according to claim 1, characterized in that: The observation window (2) is a cylindrical countersunk hole (3) opened on the wall (4) of the experimental chamber (1); the observation glass (5) can be stuck in the large hole (31) of the cylindrical countersunk hole (3); a cover plate (6) is provided outside the experimental chamber (1) at a position corresponding to the observation window (2); the cover plate (6) can apply pressure to the observation glass (5) to ensure the sealing between the observation glass (5) and the observation window (2); The cover plate (6) is provided with a through hole (7) at a position corresponding to the observation glass (5), so that the observation device can obtain image data of the experimental module (17) inside the experimental chamber (1) through the observation glass (5).

3. The observation system for use in a sealed experimental chamber according to claim 2, characterized in that: The observation glass (5) is a circular glass, and the diameter of the observation glass (5) is consistent with the aperture of the large hole (31).

4. The observation system for use in a sealed experimental chamber according to claim 3, characterized in that: A circular boss (8) is provided on one side of the cover plate (6) facing the observation glass (5); the diameter of the circular boss (8) is consistent with the diameter of the large hole (31), so that the circular boss (8) can be stuck in the large hole (31); and the through hole (7) extends toward the circular boss (8) and passes through the circular boss (8); The height of the circular boss (8) is consistent with the depth of the large hole (31), and the cover plate (6) and the cavity wall (4) of the experimental cavity (1) are fixed by bolts (9). By tightening the bolts (9), the circular boss (8) can apply pressure to the observation glass (5).

5. The observation system for use in a sealed experimental chamber according to claim 4, characterized in that: A first groove (10) is provided along the edge of the surface of the cylindrical countersunk hole (3) that contacts the mirror surface of the observation glass (5), and a second groove (11) is provided along the edge of the surface of the circular boss (8) that contacts the mirror surface of the observation glass (5), and sealing rings (12) are built into both the first groove (10) and the second groove (11); The thickness of the sealing ring (12) is greater than the depth of the first groove (10) and the second groove (11), so that when the circular boss (8) applies pressure to the observation glass (5), the large hole (31) and the circular boss (8) do not contact the mirror surface of the observation glass (5).

6. The observation system for use in a sealed experimental chamber according to claim 1 or 5, characterized in that: The observation device is an optical densitometer, a reflector (15) is provided inside the experimental chamber (1), and a lens of the optical densitometer, the experimental module (17) and the reflector (15) are coaxially arranged in sequence so that the focal length of the optical densitometer can fall on the reflector (15), thereby shortening the distance between the optical densitometer and the experimental module (17).

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