Lunar soil fine screening and enrichment mechanism based on spectrum selection design and lunar soil fine screening and enrichment method

Abstract

The present invention relates to a lunar soil fine screening and enrichment mechanism and a lunar soil fine screening and enrichment method based on spectral selection design. The lunar soil fine screening and enrichment mechanism includes a driving part, a spectral scanning part, a feeding shell, a bearing, a collecting shell, a turntable, a protective cover, a multi-channel conveying pipe and multiple collecting boxes. The upper end of the collecting shell is an open structure, and the lower end of the collecting shell is connected to the multi-channel conveying pipe. Multiple branch pipes of the multi-channel conveying pipe are connected to multiple collection boxes in a one-to-one correspondence; the feeding shell and the protective cover are respectively fixed at the open end of the collecting shell, the turntable is located in the collecting shell and a waste collection gap is reserved between the turntable and the peripheral side wall of the collecting shell; the driving end of the driving part is connected to the center position of the turntable and drives the turntable to rotate; a sample brush that contacts the turntable is provided at the lower end of the feeding shell and / or the protective cover; the scanning end of the spectral scanning part is located above the outside of the protective cover; a plurality of fine screening holes are provided on the turntable, a first valve is provided at the bottom of each fine screening hole, and a second valve is provided in the multi-channel conveying pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of lunar soil mineral sorting, and in particular to a lunar soil fine screening and enrichment mechanism and a lunar soil fine screening and enrichment method based on spectral selection design. Background Art

[0002] As one of humanity's most frequently explored celestial bodies, the Moon possesses a wealth of mineral resources and elements, including oxygen, silicon, iron, calcium, aluminum, magnesium, titanium, thorium, uranium, and helium, as well as new minerals not discovered on Earth, such as triclinic iron pyroxene and zircon. These resources are of great significance for future deep space exploration, supporting life in space, and addressing resource shortages on Earth.

[0003] Traditional terrestrial mineral separation technologies include vibrating screens, gravity separation, flotation, chemical separation, electrostatic separation, and magnetic separation. However, due to the unique lunar surface environmental factors such as microgravity, high vacuum, and temperature, and the lunar regolith's characteristic small particle size, wide particle span, and inclusions of large lunar rock particles, these mineral separation technologies cannot be effectively implemented on the lunar surface. For example, vibrating screens can be used for initial coarse particle size screening of lunar regolith minerals, but they cannot further refine and enrich lunar regolith particles, thus limiting their functionality. Gravity separation slows the settling rate of lunar regolith particles in the lunar microgravity environment, resulting in reduced separation efficiency. Flotation and chemical separation are difficult to implement because liquids cannot be used in the high vacuum conditions of the lunar surface. Electrostatic separation, however, cannot generate corona discharges due to the high vacuum environment of the lunar surface, and operating in a closed gas system would result in prohibitive operating and maintenance costs. However, triboelectric electrification screening is limited in scope and can only be used to separate insulating particles. Furthermore, 95% of lunar soil sample particles are smaller than 1 mm. In the vacuum and weak gravity of the lunar surface, some of these fine particles may not rub sufficiently, resulting in inefficient charging and affecting the separation effect. Magnetic separation is more suitable for the lunar environment than other mineral separation techniques. However, due to the vacuum environment, only dry separation can be used. For micron-sized particles such as lunar soil, the mutual adsorption between particles can form magnetic clusters or chains between magnetic and non-magnetic minerals, leading to severe inclusions, thereby reducing ore grade and separation efficiency. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the present invention provides a lunar soil fine screening and enrichment mechanism and a lunar soil fine screening and enrichment method based on spectral selection design.

[0005] The present invention solves the above-mentioned technical problems with the following technical solution: a lunar soil fine screening and enrichment mechanism based on spectral selection design includes a drive unit, a spectral scanning unit, a feed housing, a bearing, a collection housing, a turntable, a protective cover, a multi-channel delivery pipe, and multiple collection boxes. The upper end of the collection housing is an open structure, and the lower end of the collection housing is connected to the multi-channel delivery pipe. The multiple branch pipes of the multi-channel delivery pipe are connected to the multiple collection boxes in a one-to-one correspondence.

[0006] The feed shell and the protective cover are respectively fixed to the open ends of the collection shell, the turntable is located in the collection shell and a waste collection gap is reserved between the turntable and the peripheral side wall of the collection shell; the driving end of the driving part is connected to the center position of the turntable and drives the turntable to rotate; a sample brush is provided at the lower end of the first side wall of the feed shell located above the turntable and / or the lower end of the second side wall of the protective cover located above the turntable, and the sample brush is in contact with the upper surface of the turntable;

[0007] The spectral scanning part is installed on the protective cover, and the scanning end of the spectral scanning part is located above the outside of the protective cover; a plurality of fine sieve holes are provided on the turntable, and a first valve for controlling the closing or opening of the fine sieve holes is installed at a position corresponding to each fine sieve hole on the bottom surface of the turntable, and a second valve for controlling the opening of different branch pipelines is provided in the multi-channel delivery pipe.

[0008] The beneficial effect of the present invention is that the lunar soil fine screening and enrichment mechanism of the present invention can realize non-destructive and efficient identification of lunar soil particles by utilizing the spectral scanning part to scan the fine screen holes on the turntable, thereby solving the problems of limited screening range and low screening accuracy of current mineral sorting technology.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, it also includes a bearing, which is installed above the center position of the turntable, the outer ring of the bearing is fixed on the collection shell and / or the protective cover, the inner ring of the bearing is fixedly connected to the center position of the turntable, and the inner ring of the bearing is also connected to the driving end of the driving part and drives the turntable to rotate under the drive of the driving part.

[0011] The beneficial effect of adopting the above further scheme is: by setting the bearing, it is convenient to use the driving part to drive the turntable to rotate, so that the sample brush can sweep the lunar soil sample into the fine sieve hole.

[0012] Furthermore, the size of the fine sieve holes is 1 to 2 times the size of the fine sieve lunar soil particles, and the distance between two adjacent fine sieve holes is more than twice the diameter of the fine sieve holes.

[0013] The beneficial effect of adopting the above further scheme is: ensuring that only one fine-screened lunar soil particle is retained in each fine-screen hole, facilitating the subsequent spectral scanning unit to perform precise scanning.

[0014] Furthermore, arc-shaped waste collection holes are provided around the center of the turntable.

[0015] The beneficial effect of adopting the above further scheme is that the lunar soil particles that are not collected in the fine sieve holes can be discharged through the waste collection holes.

[0016] Furthermore, the first valve is a memory alloy valve.

[0017] Furthermore, the upper end of the collection shell is a circular open structure;

[0018] The feed shell and the protective cover are both semicircular structures, the straight side wall of the feed shell is the first side wall, the straight side wall of the protective cover is the second side wall, the first side wall and the second side wall are integrally arranged or the first side wall and the second side wall are in contact with each other;

[0019] Alternatively, two of the feed shells and protective covers are provided, and both the feed shells and protective covers are 1 / 4 circular structures. The two feed shells are arranged opposite to each other, and the two protective covers are arranged opposite to each other. A protective cover is provided on each side of each feed shell. The two straight side walls of the feed shell are the first side walls, and the two straight side walls of the protective cover are the second side walls. The first side wall is integrally provided with the adjacent second side wall, or the first side wall is arranged in contact with the adjacent second side wall.

[0020] The beneficial effect of adopting the above further solution is that the feed shell and protective cover of different shapes can be provided according to needs.

[0021] Furthermore, the multi-channel delivery pipe also includes a main pipe, the upper end of the main pipe is connected and communicated with the center position of the lower end of the collection shell, and the lower end of the main pipe is respectively communicated with the upper ends of multiple branch pipes; the second valve is provided on the inner side of the lower end of the main pipe.

[0022] Furthermore, there are two branch pipes and two corresponding collection boxes; the second valve is a ball valve, and the main pipe and the branch pipe are respectively provided with long strip limiting holes extending along their own length directions, and one end of multiple limiting holes are connected, and the ball valve is provided with a limiting rod, and the limiting rod is passed through the limiting hole.

[0023] The beneficial effect of adopting the above further solution is that the provision of the limiting hole and the limiting rod prevents the second valve from moving excessively in each pipeline, thereby limiting the movement range of the ball valve.

[0024] Furthermore, the main pipeline and the branch pipeline are both provided with vibration motors.

[0025] The beneficial effect of adopting the above further scheme is that the setting of the vibration motor can accelerate the falling of lunar soil particles and prevent small lunar soil particles from adhering to the inner wall during pipeline transportation.

[0026] Furthermore, it also includes a controller, which is electrically connected to the driving part, the spectrum scanning part, the first valve and the second valve respectively.

[0027] The beneficial effect of adopting the above further scheme is: by setting up a controller, automatic control of various electrical components can be achieved, and the automation of lunar soil fine screening and enrichment can be realized.

[0028] The lunar soil fine screening and enrichment method is implemented using the lunar soil fine screening and enrichment mechanism based on spectrum selection design, and includes the following steps:

[0029] S1: The lunar soil particles that have passed the initial particle size screening are transported to the turntable through the feed housing. The drive unit then drives the turntable to rotate by a set angle. During the rotation, the sample brush at the lower end of the first side wall and / or the sample brush at the lower end of the second side wall sweep the finely screened lunar soil particles that match the size of the fine sieve holes into the fine sieve holes. At this time, the first valve below the fine sieve holes is closed, and the remaining lunar soil particles are swept into the waste collection compartment and enter the corresponding collection box through the multi-channel delivery pipe.

[0030] S2: After the turntable rotates to a set angle under the drive of the driving unit, the turntable stops rotating, and the spectral scanning unit is activated to perform a surface scan of the fine sieve holes on the portion of the turntable rotated below the protective cover to obtain scanning data. The fine sieve lunar soil particles in the scanned fine sieve holes are classified based on the scanning data. Then, the first valves below the scanned fine sieve holes are opened in sequence according to the classification, so that the fine sieve lunar soil particles of the same classification are collected together, and the fine sieve lunar soil particles of different classifications are collected in batches into different collection boxes.

[0031] S3, after all the lunar soil particles in the scanned fine sieve holes are collected, the lunar soil fine sieve enrichment process is completed.

[0032] The beneficial effects of the present invention are: the lunar soil fine screening and enrichment method of the present invention can be applied to special environments such as high vacuum, microgravity, large temperature difference, and strong radiation on the lunar surface, and solves the shortcomings of traditional ground mineral sorting technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the three-dimensional structure of the lunar soil fine screening and enrichment mechanism designed based on spectral selection in the present invention;

[0034] Figure 2 This is a schematic diagram of the three-dimensional structure of the lunar soil fine screening and enrichment mechanism based on spectral selection design of the present invention, without the feed shell;

[0035] Figure 3 It is a structural schematic diagram of the turntable of the present invention;

[0036] Figure 4 Schematic diagram of the three-dimensional structure of the feed shell of the present invention;

[0037] Figure 5 Schematic diagram of the three-dimensional structure of the protective cover of the present invention;

[0038] Figure 6 This is a schematic diagram of the three-dimensional structure of the first valve of the present invention in a closed state;

[0039] Figure 7 This is a schematic diagram of the three-dimensional structure of the second valve of the present invention in an open state;

[0040] Figure 8 This is a schematic diagram of the main structure of the multi-channel delivery pipe of the present invention;

[0041] Figure 9 This is a schematic structural diagram of the multi-channel delivery pipe of the present invention in a closed state;

[0042] Figure 10 This is a schematic diagram of the structure of the multi-channel delivery pipe in the open state of the present invention Figure 1 ;

[0043] Figure 11 This is a schematic diagram of the structure of the multi-channel delivery pipe in the open state of the present invention Figure 2 ;

[0044] Figure 12 This is a schematic diagram of the structure of the lunar soil fine screening and enrichment mechanism based on spectrum selection design of the present invention that inputs lunar soil particles;

[0045] Figure 13 This is a structural diagram of the turntable rotation angle setting of the lunar soil fine screening and enrichment mechanism based on spectral selection design of the present invention;

[0046] Figure 14 This is a schematic diagram of the structure of the lunar soil fine screening and enrichment mechanism designed based on spectrum selection in the present invention for collecting finely screened lunar soil samples;

[0047] Figure 15 This is a schematic diagram of the structure of the lunar soil fine screening and enrichment mechanism designed based on spectral selection in the present invention for collecting residual lunar soil sample waste.

[0048] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0049] 101. Driving unit; 102. Driving gear set; 103. Spectral scanning unit; 104. Feed shell; 105. Feed port; 106. Bearing; 107. Collection shell; 108. Turntable; 109. Protective cover; 110. Main pipeline; 111. Branch pipeline; 112. Recovery box; 113. Fine screening enrichment box; 114. Waste collection interval; 115. First side wall; 116. Second side wall; 117. Sample brush; 118. Memory alloy; 119. Second valve; 120. Fine screening hole; 121. Waste collection hole; 122. Vibration motor; 123. Power module; 124. Limit hole; 125. Limit rod; 126. First bearing mounting half hole; 127. Second bearing mounting half hole. DETAILED DESCRIPTION

[0050] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0051] like Figures 1 to 15 As shown, a lunar soil fine screening and enrichment mechanism based on spectral selection design in this embodiment includes a drive unit 101, a spectral scanning unit 103, a feed housing 104, a bearing 106, a collection housing 107, a turntable 108, a protective cover 109, a multi-channel delivery pipe, and multiple collection boxes. The upper end of the collection housing 107 is an open structure, and the lower end of the collection housing 107 is connected to the multi-channel delivery pipe. Multiple branch pipes 111 of the multi-channel delivery pipe are connected to the multiple collection boxes in a one-to-one correspondence.

[0052] The feed shell 104 and the protective cover 109 are respectively fixed to the open ends of the collection shell 107. The turntable 108 is located in the collection shell 107 and a waste collection gap 114 is reserved between the turntable 108 and the peripheral side wall of the collection shell 107. The driving end of the driving unit 101 is connected to the center of the turntable 108 and drives the turntable 108 to rotate. A sample brush 117 is provided at the lower end of the first side wall 115 of the feed shell 104 located above the turntable 108 and / or the lower end of the second side wall 116 of the protective cover 109 located above the turntable 108. The sample brush 117 is in contact with the upper surface of the turntable 108.

[0053] The spectral scanning unit 103 is installed on the protective cover 109, and the scanning end of the spectral scanning unit 103 is located above the outside of the protective cover 109 and does not enter the protective cover; a plurality of fine sieve holes 120 are provided on the turntable 108, and a first valve for controlling the closing or opening of the fine sieve hole 120 is installed at a position corresponding to each fine sieve hole 120 on the bottom surface of the turntable 108, and a second valve 119 for controlling the opening of different branch pipes 111 is provided in the multi-channel conveying pipe.

[0054] The spectral scanning unit 103 of this embodiment can utilize a micro-Raman spectroscopy scanning system, which can address the limitations of current mineral sorting technologies, including limited screening range and low screening accuracy. The micro-Raman spectroscopy scanning system utilizes a micro-laser Raman spectrometer (Raman), which can perform single-point spectral analysis, line scanning, and rapid confocal 2D and 3D mapping, identifying phase distribution through Raman peaks. Raman point analysis or mapping can be performed at different depths within the sample surface or interior (for transparent materials).

[0055] like Figure 2 and Figure 3 As shown, the lunar soil fine screening and enrichment mechanism based on spectrum selection design in this embodiment also includes a bearing 106, which is mounted above the center of the turntable 108. The outer ring of the bearing 106 is fixed to the collection housing 107 and / or the protective cover 109, and the inner ring of the bearing 106 is fixedly connected to the center of the turntable 108. The inner ring of the bearing 106 is also connected to the driving end of the driving unit 101 and drives the turntable 108 to rotate under the drive of the driving unit 101. The provision of the bearing facilitates the use of the driving unit to drive the turntable to rotate, thereby enabling the sample brush to sweep the lunar soil sample into the fine screening holes.

[0056] Specifically, the inner ring of the bearing 106 of this embodiment is connected to the driving end of the driving unit 101 through a driving gear set 102. The driving gear set 102 may include a driving gear and a driven gear. The driving gear is connected to the driving end of the driving unit 101, and the driven gear is connected to the inner ring of the bearing 106. Power can be transmitted by directly meshing the driving gear and the driven gear, or a gear set can be provided between the driving gear and the driven gear to transmit power between the driving gear and the driven gear through the gear set. The driving unit 101 can adopt a stepping motor.

[0057] A preferred solution of this embodiment is to have the size of the fine sieve holes 120 be 1-2 times the size of the finely sieved lunar soil particles, and the distance between two adjacent fine sieve holes 120 be at least twice the diameter of the fine sieve holes 120. (The size of the fine sieve holes includes both the inner diameter and height; the size of the finely sieved lunar soil particles refers to their particle size.) This ensures that only one finely sieved lunar soil particle remains within each fine sieve hole, facilitating subsequent accurate scanning by the spectral scanning unit.

[0058] like Figure 2 As shown, a preferred solution of this embodiment is that arc-shaped waste collection holes 121 are provided around the center of the turntable 108. The lunar soil particles that are not collected in the fine sieve holes can be discharged through the waste collection holes.

[0059] A preferred solution of this embodiment is as follows: Figure 6 and Figure 7 As shown, the first valve is a memory alloy valve. The memory alloy valve includes a memory alloy 118 and a power module (DC / DC power module) 123. The DC / DC power module can be used to drive the memory alloy 118 to move, thereby realizing the opening and closing of the fine sieve hole. The power module 123 can control the opening and closing of the memory alloy valve by an electric / magnetic / thermal system. One end of the memory alloy 118 is connected to the power module 123 and is driven by the power module 123 to move, and the other end of the memory alloy 118 is placed at the bottom of the fine sieve hole. When the micro-Raman spectroscopy scanning system converts the spectral imaging information of the fine sieve lunar soil particles in the scanned fine sieve hole into a control signal and transmits it to the DC / DC power module, the power supply outputs a specific voltage and current value to control the deformation of the memory alloy 118 to realize the opening and closing of the valve. The closed and open states of the memory alloy 118 are shown as follows. Figure 6 and Figure 7 As shown. Furthermore, to ensure that control components such as the power module in each fine screen hole operate independently and do not interfere with each other, each fine screen hole is separated by at least twice the hole diameter, and the blank areas of the turntable are made of insulating and heat-insulating material. Shape memory alloys are special alloy materials that can deform when connected to a power source and heated, such as by contraction, elongation, and bending. Nickel-titanium shape memory alloys are preferred. The working principle of magnetic shape memory alloys is to use the Zeeman static magnetostrictive force of a magnetic field on unfavorably oriented martensitic variants in the shape memory alloy, causing the favorable oriented martensitic variants to grow and engulf the unfavorably oriented variants (manifested by the movement of twin boundaries), thereby producing macroscopic deformation. When the magnetic field intensity is reduced or removed, the twin boundaries return to their initial positions. The working principle of electrically driven / thermally driven shape memory alloys is that after plastic deformation in the martensitic state, the alloy is heated above the Af temperature and automatically returns to the parent phase state. If it is cooled again below the Mf temperature, it automatically returns to its original plastically deformed or martensitic shape.

[0060] like Figures 1 to 3 As shown, the upper end of the collecting shell 107 of this embodiment is a circular open structure; wherein the arrangement of the feeding shell 104 and the protective cover 109 can have the following two optional solutions:

[0061] Optional Option 1: The feed shell 104 and the protective cover 109 are both semicircular structures, the straight side wall of the feed shell 104 is the first side wall 115, and the straight side wall of the protective cover 109 is the second side wall 116. The first side wall 115 and the second side wall 116 are arranged as one body or the first side wall 115 and the second side wall 116 are arranged in contact with each other; in this embodiment, the first side wall 115 of the feed shell 104 and the second side wall 116 of the protective cover 109 are separated and arranged in contact with each other, a first bearing mounting half hole 126 is provided on the first side wall 115, and a second bearing mounting half hole 127 is provided on the second side wall 116, and the outer ring of the bearing 106 can be assembled in the bearing mounting hole formed by the first bearing mounting half hole 126 and the second bearing mounting half hole 127.

[0062] Option 2: Two of the feed shells 104 and protective covers 109 are provided, and both the feed shells 104 and protective covers 109 are 1 / 4 circular structures. The two feed shells 104 are arranged opposite to each other, and the two protective covers 109 are arranged opposite to each other. A protective cover 109 is provided on each side of each feed shell 104. The two straight side walls of the feed shell 104 are the first side walls 115, and the two straight side walls of the protective cover 109 are the second side walls 116. The first side wall 115 and the adjacent second side wall 116 are arranged as one piece or the first side wall 115 and the adjacent second side wall 116 are arranged in contact with each other.

[0063] In addition to the above two optional solutions, other solutions can be adopted for the arrangement of the feed shell 104 and the protective cover 109, for example, three or four feed shells 104 and four protective covers 109 are arranged respectively.

[0064] Specifically, such as Figure 4 As shown, the feed opening 105 of the feed housing 104 of this embodiment is designed to take into account the rectangular structure of most excavation wheel delivery ports. Furthermore, since the collection housing 107 and turntable 108 need to coordinate the loading and scanning and sorting cycles, the main structural design of the feed housing 104 can refer to the two alternatives described above. Furthermore, to ensure a relatively uniform distribution of the incoming lunar soil on the turntable and a relatively synchronized and slow particle descent, the inner wall of the feed opening is designed with a spiral funnel-shaped structure based on kinematic calculations. Furthermore, to ensure that lunar soil particles quickly enter the fine sieve holes on the turntable, all lunar soil particles on the turntable must be removed before the entire device begins operation. A protective cover 109 is located adjacent to the feed housing 104. Its function is to prevent dust or scattering of lunar soil during the cleaning and collection process, which could cause contamination and interfere with the normal operation of the detection system and electronic equipment. The protective cover and the sample brush at the bottom of the feed housing ensure that lunar soil particles quickly enter the fine sieve holes and keep the turntable clean.

[0065] To ensure clear imaging for the Raman microscopic spectroscopy system, sample brushes at the feed port 105 and the bottom of the protective cover 109 ensure that each fine-screen hole contains at most one lunar soil particle, referred to as a fine-screen lunar soil particle. (Because all lunar soil particles entering the feed housing have undergone preliminary screening, the lunar soil particles entering the housing are within a fixed size range.) Excess lunar soil particles are swept by the sample brushes into the waste collection compartment and waste collection hole, ultimately falling into the recovery chamber.

[0066] like Figure 1 、 Figure 2 、 Figures 8 to 15 As shown, the multi-channel conveying pipe in this embodiment also includes a main pipe 110, the upper end of the main pipe 110 is connected and communicated with the center position of the lower end of the collecting shell 107, and the lower end of the main pipe 110 is respectively communicated with the upper ends of multiple branch pipes 111; the second valve 119 is provided on the inner side of the lower end of the main pipe 110.

[0067] like Figure 1 、 Figure 2 、 Figures 8 to 15 As shown, in this embodiment, there are two branch pipes 111, and two corresponding collection boxes, namely a recovery box 112 and a fine screening and enrichment box 113. The recovery box 112 is used to recover excess lunar soil particles that have not entered the fine screening holes, and the fine screening and enrichment box 113 is used to receive finely screened lunar soil particles of the same classification selected by the spectral scanning unit within the fine screening holes. The second valve 119 is a ball valve. The main pipe 110 and the branch pipe 111 are each provided with a long, rectangular limiting hole 124 extending along their length. One end of the plurality of limiting holes 124 is connected. The ball valve is provided with a limiting rod 125, which is inserted into the limiting hole 124. The provision of the limiting hole and limiting rod prevents the second valve from excessive movement within each pipe, thereby limiting the range of motion of the ball valve.

[0068] like Figure 1 、 Figure 2 、 Figures 8 to 15 As shown, in this embodiment, the main pipe 110 and the branch pipe 111 are both provided with a vibration motor 122. The provision of the vibration motor can accelerate the falling of lunar soil particles and prevent small lunar soil particles from adhering to the inner wall during pipeline transportation.

[0069] A preferred embodiment of this embodiment is that the spectral-selection-based lunar soil screening and enrichment mechanism further includes a controller electrically connected to the drive unit 101, the spectral scanning unit 103, and the first and second valves 119. The controller enables automatic control of the various electrical components, thus automating the lunar soil screening and enrichment process.

[0070] The lunar soil fine screening and enrichment mechanism of this embodiment can realize non-destructive and efficient identification of lunar soil particles by using the spectral scanning part to scan the fine screen holes on the turntable, thereby solving the problems of limited screening range and low screening accuracy of current mineral sorting technology.

[0071] This embodiment also provides a lunar soil fine screening and enrichment method, which is implemented using the above-mentioned lunar soil fine screening and enrichment mechanism based on spectral selection design, and includes the following steps:

[0072] S1: The lunar soil particles that have passed the initial particle size screening are transported to the turntable 108 through the feed housing 104. Then, the drive unit 101 drives the turntable 108 to rotate the set angle. During the rotation, the sample brush 117 at the lower end of the first side wall 115 and / or the sample brush 117 at the lower end of the second side wall 116 sweep the finely screened lunar soil particles that match the size of the fine sieve holes 120 into the fine sieve holes 120. At this time, the first valve below the fine sieve holes 120 is closed (to ensure that there is only one finely screened lunar soil particle in each fine sieve hole). At the same time, the remaining lunar soil particles are swept into the waste collection compartment 114 and enter the corresponding collection box through the multi-channel conveying pipe.

[0073] S2, when the turntable 108 rotates to the set angle under the drive of the driving unit 101, the turntable 108 stops rotating, and the spectrum scanning unit 103 is started to perform a surface scan on the fine sieve holes 120 on the part of the turntable 108 that rotates to the bottom of the protective cover 109 to obtain Raman imaging data. The fine sieve lunar soil particles in the scanned fine sieve holes 120 are classified by spectral information (each lunar soil particle is enriched with a relatively large proportion of minerals, and each mineral has its own spectral information, which can be matched with the atlas in the system library for classification. Since the scanning unit performs a surface scan, all the scanned lunar soil particles in the fine sieve holes can be classified). The lunar soil particles are uniformly classified and processed; Raman spectroscopy is a unique chemical fingerprint for specific molecules or materials, which can be used to quickly confirm the type of mineral or distinguish different mineral particles. The Raman spectroscopy database contains thousands of spectra. By quickly searching and finding the spectral data that matches the substance being analyzed, the analyzed substance can be identified. Then, the first valve under the scanned fine sieve hole 120 is opened in sequence according to the classification (all valves of the same classification are opened together), so that the fine sieve lunar soil particles of the same classification are collected together, and the fine sieve lunar soil particles of different classifications are collected in batches into different collection boxes;

[0074] S3, after all the lunar soil particles in the scanned fine screening holes 120 are collected, the lunar soil fine screening and enrichment process is completed.

[0075] The lunar soil fine screening and enrichment method of this embodiment can be applied to special environments such as high vacuum, microgravity, large temperature differences, and strong radiation on the lunar surface, and solves the shortcomings of traditional ground mineral sorting technology.

[0076] The lunar soil fine screening and enrichment mechanism and method of this embodiment innovatively uses memory alloy to replace the complex mechanical servo mechanism, solves the problem of micron-level servo system control, improves the accuracy and durability of the mineral sorting device, and reduces the subsequent maintenance cost of the device.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0080] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0081] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0082] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A lunar soil fine screening and enrichment method, characterized in that: The system is realized by adopting a lunar soil fine screening and enrichment mechanism based on spectral selection design, which includes a drive unit, a spectral scanning unit, a feed shell, a bearing, a collection shell, a turntable, a protective cover, a multi-channel delivery pipe and multiple collection boxes. The upper end of the collection shell is an open structure, and the lower end of the collection shell is connected to the multi-channel delivery pipe. The multiple branch pipes of the multi-channel delivery pipe are connected to the multiple collection boxes in a one-to-one correspondence; the spectral scanning unit adopts a micro-Raman spectroscopy scanning system; The feed shell and the protective cover are respectively fixed to the open ends of the collection shell, the turntable is located in the collection shell and a waste collection gap is reserved between the turntable and the peripheral side wall of the collection shell; the driving end of the driving part is connected to the center position of the turntable and drives the turntable to rotate; a sample brush is provided at the lower end of the first side wall of the feed shell located above the turntable and / or the lower end of the second side wall of the protective cover located above the turntable, and the sample brush is in contact with the upper surface of the turntable; The spectrum scanning unit is mounted on the protective cover, with the scanning end of the spectrum scanning unit located above the exterior of the protective cover; a plurality of fine sieve holes are formed on the turntable, and a first valve for controlling the closing or opening of each fine sieve hole is mounted on the bottom surface of the turntable at a position corresponding to each fine sieve hole; a second valve for controlling the opening of different branch pipes is disposed in the multi-channel delivery pipe; the first valve is a memory alloy valve; The lunar soil fine screening and enrichment method comprises the following steps: S1: The lunar soil particles that have passed the initial particle size screening are transported to the turntable through the feed housing. The drive unit then drives the turntable to rotate by a set angle. During the rotation, the sample brush at the lower end of the first side wall and / or the sample brush at the lower end of the second side wall sweep the finely screened lunar soil particles that match the size of the fine sieve holes into the fine sieve holes. At this time, the first valve below the fine sieve holes is closed, and the remaining lunar soil particles are swept into the waste collection compartment and enter the corresponding collection box through the multi-channel delivery pipe. S2: After the turntable rotates to a set angle under the drive of the driving unit, the turntable stops rotating, and the spectral scanning unit is activated to perform a surface scan of the fine sieve holes on the portion of the turntable rotated below the protective cover to obtain scanning data. The fine sieve lunar soil particles in the scanned fine sieve holes are classified based on the scanning data. Then, the first valves below the scanned fine sieve holes are opened in sequence according to the classification, so that the fine sieve lunar soil particles of the same classification are collected together, and the fine sieve lunar soil particles of different classifications are collected in batches into different collection boxes. S3, after all the lunar soil particles in the scanned fine sieve holes are collected, the lunar soil fine sieve enrichment process is completed.

2. The lunar soil fine screening and enrichment method according to claim 1, characterized in that: It also includes a bearing, which is installed above the center position of the turntable. The outer ring of the bearing is fixed on the collection shell and / or the protective cover, and the inner ring of the bearing is fixedly connected to the center position of the turntable. The inner ring of the bearing is also connected to the driving end of the driving part and drives the turntable to rotate under the drive of the driving part.

3. The method for fine screening and enrichment of lunar soil according to claim 1, characterized in that: The size of the fine sieve holes is 1 to 2 times the size of the fine sieve lunar soil particles, and the distance between two adjacent fine sieve holes is more than twice the diameter of the fine sieve holes.

4. The lunar soil fine screening and enrichment method according to claim 1, characterized in that: Arc-shaped waste collection holes are also provided around the center of the turntable.

5. The method for fine screening and enrichment of lunar soil according to claim 1, characterized in that: The upper end of the collecting shell is a circular open structure; The feed shell and the protective cover are both semicircular structures, the straight side wall of the feed shell is the first side wall, the straight side wall of the protective cover is the second side wall, the first side wall and the second side wall are integrally arranged or the first side wall and the second side wall are in contact with each other; Alternatively, two of the feed shells and protective covers are provided, and both the feed shells and protective covers are 1 / 4 circular structures. The two feed shells are arranged opposite to each other, and the two protective covers are arranged opposite to each other. A protective cover is provided on each side of each feed shell. The two straight side walls of the feed shell are the first side walls, and the two straight side walls of the protective cover are the second side walls. The first side wall is integrally provided with the adjacent second side wall, or the first side wall is arranged in contact with the adjacent second side wall.

6. The lunar soil fine screening and enrichment method according to claim 1, characterized in that: The multi-channel delivery pipe also includes a main pipe, the upper end of which is connected and communicated with the center position of the lower end of the collection shell, and the lower end of the main pipe is respectively communicated with the upper ends of multiple branch pipes; the second valve is provided on the inner side of the lower end of the main pipe.

7. The lunar soil fine screening and enrichment method according to claim 6, characterized in that: There are two branch pipes and two corresponding collection boxes; the second valve is a ball valve, and the main pipe and the branch pipe are respectively provided with long strip limiting holes extending along their own length directions, and one end of multiple limiting holes is connected, and the ball valve is provided with a limiting rod, and the limiting rod is passed through the limiting hole; the main pipe and the branch pipe are both provided with a vibration motor.

8. The method for fine screening and enrichment of lunar soil according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the driving part, the spectrum scanning part, the first valve and the second valve respectively.

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