Method for preparing multi-condition multi-water content simulated water-ice lunar soil

Abstract

The application discloses a kind of multi-working condition multi-water content simulation water ice lunar soil preparation methods, specifically comprising the following steps: S1, raw material selection: select and real lunar soil similar mineral composition as the raw material of simulation lunar soil;S2, sample preparation before: the raw material in step S1 is placed in container and put into oven drying;S3, water-containing sample preparation: the raw material sample after drying of step S2 is sealed and transported to sample preparation environment, carries out water vapor adsorption, obtains water-containing sample;S4, water ice sample preparation: the water-containing sample in step S3 is transported to glove box by sealed bag, and after reaching temperature balance in glove box, it is placed in sample chamber refrigeration, and then the sealed bag is removed, it is simulation water ice lunar soil sample.Water-containing sample uses water vapor adsorption method, relies on the capillary effect of simulation lunar soil to let water diffuse freely, and then water vapor balance can be achieved, which can avoid the uneven water distribution of stirring water-containing sample.

Description

Technical Field

[0001] This patent application relates to the field of simulated water-ice-moon soil preparation technology, and in particular to a method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents. Background Technology

[0002] To address the issue that uneven water ice content in the lunar shadow region affects the success rate of water ice drilling by the spacecraft, a lunar soil water ice in-situ detection sensor was developed to obtain real-time trends in lunar soil water ice content and to make preliminary judgments on the surface frost layer of the sampling area and the lunar soil water ice content before sampling.

[0003] Verifying the water ice detection threshold is a crucial step in proving the sensor's adaptability. Therefore, it is necessary to prepare simulated water ice lunar soil with different operating conditions and moisture contents to complete ground-based verification experiments. The preparation of simulated water ice lunar soil with different operating conditions and moisture contents presents four main technical challenges: First, the homogeneity of the moist lunar soil samples cannot be guaranteed, and agglomeration during preparation is unavoidable, causing significant fluctuations in sensor test results; second, simulated lunar soil samples with ultra-low moisture content (less than 1 wt%) are highly unstable in air and easily absorb moisture from the atmosphere; third, samples with normal moisture content are volatile, differing from the overall moisture content and leading to errors in the results; and fourth, the liquid nitrogen cold trap exhibits strong hygroscopicity, affecting the calculation of water ice content. Therefore, we propose a multi-condition, multi-moisture-content simulated lunar soil preparation method. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this patent application is to provide a method for preparing simulated water ice lunar soil under multiple working conditions and with multiple moisture contents, so as to solve the problems of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for preparing simulated water ice lunar soil under multiple working conditions and with multiple moisture contents specifically includes the following steps:

[0007] S1. Raw material selection: Select mineral components similar to real lunar soil as raw materials for simulating lunar soil;

[0008] S2. Sample preparation: Place the raw materials from step S1 into a container;

[0009] S3. Sample drying: Place the sample from step S2 into an oven to dry.

[0010] S4. Preparation of water-containing samples: The dried sample from step S3 is sealed and transported to the sample preparation environment for water vapor adsorption to obtain a water-containing sample.

[0011] S5. Preparation of water ice sample: The water-containing sample from step S4 is transported to a glove box through a sealed bag and allowed to stand until the temperature inside the glove box reaches equilibrium. Then, it is placed in the sample chamber for cooling and the sealed bag is removed. This is the simulated water ice lunar soil sample.

[0012] S6: Sample re-drying: Take the simulated water ice and soil sample obtained in step S5 out of the glove box, open the lid and place it in the oven to dry again.

[0013] Furthermore, in steps S3 and S6, the oven temperature is set to 130-150℃, and the baking time is set to 6-10h.

[0014] Furthermore, in step S4, the sample preparation environment is as follows: water is placed in the middle, raw material samples are evenly placed around the perimeter, and the whole sample is covered with an acrylic cover. The ambient temperature is controlled at 25-30℃, the ambient humidity at 40-50%, and the water temperature inside the acrylic cover is kept at 40℃. The sample is left to stand for 24-48 hours to obtain a water-containing sample with a mass fraction of 0.8wt%-2.0wt%.

[0015] Furthermore, in step S4, the sample preparation environment is as follows: water is placed in the middle, raw material samples are evenly placed around the perimeter, and the whole sample is covered inside an acrylic cover. The ambient temperature is controlled at 20-25℃, the ambient humidity at 40-50%, and the water temperature inside the acrylic cover is kept at room temperature. The sample is left to stand for 6-24 hours to obtain a water-containing sample with a mass fraction of 0.4wt%-0.8wt%.

[0016] Furthermore, in step S4, the sample preparation environment is controlled at an ambient temperature of 20-25℃ and an ambient humidity of 40-50%. The raw material sample is exposed to the external environment and left to stand for 5-30 minutes to obtain a water-containing sample with a mass fraction of 0.2wt%-0.4wt%.

[0017] Furthermore, the equipment for preparing water-ice-moon soil in step S5 includes a non-standard liquid nitrogen tank, a glove box, a glass cover, and a nitrogen cylinder. The non-standard liquid nitrogen tank includes a sample chamber, a liquid nitrogen chamber, a low-pressure liquid nitrogen cylinder, and a controller. The nitrogen cylinder is connected to the sample chamber and the inner cavity of the glove box through pipes. The sample chamber and the glove box are spatially isolated by the glass cover. The liquid nitrogen chamber is fitted onto the sample chamber. The low-pressure liquid nitrogen cylinder is connected to the liquid nitrogen chamber through another pipe. The controller automatically controls the liquid level height in the liquid nitrogen chamber.

[0018] Furthermore, the glove box is also equipped with a thermometer, hygrometer, and analytical balance.

[0019] Furthermore, a temperature monitor is provided inside the sample chamber to monitor the temperature inside the sample chamber in real time. The temperature monitor displays the temperature inside the sample chamber in real time through a controller.

[0020] Furthermore, in step S5, before sending the water-containing sample to the glove box, the sample chamber and the glove box are continuously filled with 99.999% industrial high-purity nitrogen. After the air in the sample chamber is exhausted, the nitrogen filling of the sample chamber is stopped, and liquid nitrogen is injected into the liquid nitrogen chamber to maintain a low-temperature stable environment in the sample chamber. After the sample preparation conditions are met, the glass cover of the liquid nitrogen chamber is closed, and the water-containing sample is transported to the glove box and left to stand for 4-6 minutes. After the sample temperature reaches equilibrium with the temperature inside the glove box, the sealing bag is removed, and the sample is weighed on an analytical balance. The sample is then resealed with a sealing bag and placed in the sample chamber to cool for 4-6 minutes. The sealing bag is removed again. This sample is the simulated water-ice lunar soil sample with a specific mass fraction range.

[0021] Furthermore, the specific operation for the specific mass fraction range of the water ice sample is as follows:

[0022] The container in step S2 is a covered container. The raw material simulating lunar soil is weighed and recorded as M0 before being put into the container.

[0023] After the drying process in step S3 is completed, cover the container, weigh it quickly, and record the weight as M1.

[0024] After the sample temperature and the glove box temperature reach equilibrium in step S5, the sample is placed on the analytical balance inside the glove box and weighed, and recorded as M2.

[0025] After the sample is dried again in step S6, cover it and weigh it quickly to get M3.

[0026] The calculation formula is as follows:

[0027]

[0028] V1=min(P1,P2), V2=max(P1,P2)

[0029] V = [V1, V2]

[0030] Wherein, P1 is the mass fraction calculated based on the first drying as the background, P2 is the mass fraction calculated based on the second drying as the background, V1 is the minimum water ice content of the sample, V2 is the maximum water ice content of the sample, and V is the mass fraction range of the prepared water-containing simulated sample.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. The water-containing sample adopts the water vapor adsorption method, which relies on the capillary effect of the simulated lunar soil to allow water to diffuse freely, thereby achieving water vapor balance and avoiding the uneven distribution of water in the water-containing sample caused by stirring.

[0033] 2. A low-humidity environment is created using high-purity nitrogen, forming zones of varying temperatures. This facilitates sample handling and condition maintenance, preventing the sample from adsorbing moisture from the environment during preparation and thus altering the water ice content.

[0034] 3. The analytical balance is built-in, avoiding interference caused by weight changes when the sample enters and exits the nitrogen environment;

[0035] 4. This technical solution can effectively simulate the water ice content in craters within the effective shadowed region of the moon, verify the sensor detection threshold, and has beneficial technical effects. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the equipment structure during the water ice sample preparation process of the present invention. Detailed Implementation

[0037] The following specific examples illustrate the implementation of this patent application. Those skilled in the art can easily understand other advantages and effects of this patent application from the content disclosed in this specification. This patent application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this patent application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0038] This invention provides the following technical solution:

[0039] A method for preparing simulated water ice lunar soil under multiple working conditions and with multiple moisture contents specifically includes the following steps:

[0040] S1. Raw material selection: Select mineral components similar to real lunar soil as raw materials for simulating lunar soil;

[0041] S2. Sample preparation: Place the raw materials from step S1 into a container;

[0042] S3. Sample drying: Place the sample from step S2 into an oven for drying; set the oven temperature to 130-150℃ and the drying time to 6-10h.

[0043] S4. Preparation of water-containing samples: The dried samples from step S3 are sealed and transported to the sample preparation environment for water vapor adsorption to obtain water-containing samples. The sample preparation environment consists of water in the middle, raw material samples evenly placed around the perimeter, and the whole sample is covered with an acrylic cover. The ambient temperature is controlled at 25-30℃, the ambient humidity at 40-50%, and the water temperature inside the acrylic cover is kept at 40℃. The sample is left to stand for 24-48 hours to obtain water-containing samples with a mass fraction of 0.8wt%-2.0wt%.

[0044] The environment for preparing water-containing samples can also be as follows: water is placed in the middle, raw material samples are evenly placed around the perimeter, the whole sample is covered in an acrylic cover, the ambient temperature is controlled at 20-25℃, the ambient humidity is controlled at 40-50%, the water temperature inside the acrylic cover is kept at room temperature, and the sample is left to stand for 6-24 hours to obtain a water-containing sample with a mass fraction of 0.4wt%-0.8wt%.

[0045] The environment for preparing water-containing samples can also be: ambient temperature 20-25℃, ambient humidity 40-50%, raw material sample exposed to the external environment, left to stand for 5-30 minutes, to obtain water-containing samples with a mass fraction of 0.2wt%-0.4wt%.

[0046] S5. Water Ice Sample Preparation: The water-containing sample from step S4 is transported to a glove box via a sealed bag and left to stand. Before placing the water-containing sample into the glove box, the sample chamber and the glove box are continuously filled with 99.999% industrial high-purity nitrogen. After the air in the sample chamber is exhausted, the nitrogen filling of the sample chamber is stopped, and liquid nitrogen is injected into the liquid nitrogen chamber to maintain a low-temperature stable environment in the sample chamber. After the sample preparation conditions are met, the glass cover of the liquid nitrogen chamber is closed, and the water-containing sample is transported to the glove box and left to stand for 4-6 minutes. After the sample temperature reaches equilibrium with the temperature inside the glove box, the sealed bag is removed, and the sample is weighed on an analytical balance. The sample is then resealed with a sealed bag and placed in the sample chamber for cooling for 4-6 minutes. The sealed bag is removed again, and the sample is now a simulated water ice lunar soil sample.

[0047] S6: Sample re-drying: Take the simulated water ice lunar soil sample obtained in step S5 out of the glove box, open the lid and place it in the oven to dry again. Set the oven temperature to 130-150℃ and the drying time to 6-10h. After calculation, the specific mass fraction range of the water ice lunar soil sample can be determined.

[0048] The specific procedures for determining the specific mass fraction range of water ice lunar soil samples are as follows:

[0049] In step S2, the container is a covered container. Before the simulated lunar soil raw material is put into the container, it is covered and weighed, and recorded as M0. After drying in step S3, it is covered and weighed quickly, and recorded as M1. After the sample temperature reaches equilibrium with the glove box temperature in step S5, the sample is placed on the analytical balance in the glove box and weighed, and recorded as M2. After the sample is dried again in step S6, it is covered and weighed quickly, and recorded as M3.

[0050] The calculation formula is as follows:

[0051]

[0052] V1=min(P1,P2), V2=max(P1,P2)

[0053] V = [V1, V2]

[0054] Wherein, P1 is the mass fraction calculated based on the first drying as the background, P2 is the mass fraction calculated based on the second drying as the background, V1 is the minimum water ice content of the sample, V2 is the maximum water ice content of the sample, and V is the mass fraction range of the prepared water-containing simulated sample.

[0055] In addition, such as Figure 1 As shown, the equipment for preparing water-ice lunar soil in step S5 includes a non-standard liquid nitrogen tank, a glove box 3, a glass cover 2, and a nitrogen cylinder 10. The non-standard liquid nitrogen tank includes a sample chamber 8, a liquid nitrogen chamber 9, a low-pressure liquid nitrogen cylinder 11, and a controller 5. The nitrogen cylinder 10 is connected to the inner cavity of the sample chamber 8 and the glove box 3 via pipes. The sample chamber 8 and the glove box 3 are spatially isolated by the glass cover 2 to prevent the environment inside the glove box from affecting the sample when it is being cooled. The liquid nitrogen chamber 9 is fitted onto the sample chamber 8. The low-pressure liquid nitrogen cylinder 11 is connected to the liquid nitrogen chamber 9 via another pipe. The controller 5 automatically controls the liquid level in the liquid nitrogen chamber 9. The glove box 3 is also equipped with a thermometer and hygrometer 1 and an analytical balance 4. The thermometer and hygrometer 1 monitors the environment inside the glove box 3, and the analytical balance 4 is built-in to prevent interference caused by weight changes after the sample enters the nitrogen environment. The sample chamber 8 is equipped with a temperature monitor 6 that monitors the temperature inside the sample chamber 8 in real time. The temperature monitor 6 displays the temperature inside the sample chamber 8 in real time via the controller 5.

[0056] Example 1

[0057] S1. Raw material selection: Select mineral components similar to real lunar soil as raw materials for simulating lunar soil;

[0058] S2. Sample preparation: Place the raw materials from step S1 into a container;

[0059] S3. Sample drying: Open the sample from step S2 and place it in an oven to dry; set the oven temperature to 140℃ and the drying time to 8h.

[0060] S4. Preparation of water-containing samples: The dried sample from step S3 is sealed and transported to the sample preparation environment for water vapor adsorption to obtain a water-containing sample. The sample preparation environment consists of water in the middle, raw material samples evenly placed around the edges, and the whole sample is covered with an acrylic cover. The ambient temperature is 30℃, the ambient humidity is 45%, and the water temperature inside the acrylic cover is kept at 40℃. After standing for 36 hours, a water-containing sample of approximately 1.7wt% is obtained.

[0061] S5. Water Ice Sample Preparation: The water-containing sample from step S4 is transported to a glove box via a sealed bag and left to stand. Before placing the water-containing sample into the glove box, the sample chamber and the glove box are continuously filled with 99.999% industrial high-purity nitrogen. After the air in the sample chamber is exhausted, the nitrogen filling of the sample chamber is stopped, and liquid nitrogen is injected into the liquid nitrogen chamber to maintain a low-temperature stable environment in the sample chamber. After the sample preparation conditions are met, the glass cover of the liquid nitrogen chamber is closed, and the water-containing sample is transported to the glove box and left to stand for 5 minutes. After the sample temperature reaches equilibrium with the temperature inside the glove box, the sealed bag is removed, and the sample is weighed on an analytical balance. The sample is then resealed with a sealed bag and placed in the sample chamber for cooling for 5 minutes. The sealed bag is removed again, and the sample is now a simulated water ice lunar soil sample.

[0062] S6: Sample Re-drying: Remove the simulated water-ice lunar soil sample obtained in step S5 from the glove box, open the lid, and place it in an oven for re-drying. Set the oven temperature to 140℃ and the drying time to 8 hours. According to calculations, this sample is the simulated water-ice lunar soil sample with a specific mass fraction range. The specific operation for the specific mass fraction range of the water-ice lunar soil sample is as follows:

[0063] In step S2, the container is a covered container. Before placing the simulated lunar soil material into the container, the container is covered and weighed, recorded as M0 = 51.879g. After drying in step S3, the container is covered and weighed quickly, recorded as M1 = 92.811g. In step S5, after the sample temperature reaches equilibrium with the glove box temperature, the sample is placed on the analytical balance inside the glove box and weighed, recorded as M2 = 93.51g. In step S6, after the sample is dried again, the container is covered and weighed quickly, recorded as M3 = 92.828g.

[0064] The calculation formula is as follows:

[0065]

[0066] V1=min(P1,P2), V2=max(P1,P2)

[0067] V = [V1, V2]

[0068] Wherein, P1 is the mass fraction calculated based on the first drying as the background, P2 is the mass fraction calculated based on the second drying as the background, V1 is the minimum water ice content of the sample, V2 is the maximum water ice content of the sample, and V is the mass fraction range of the prepared water-containing simulated sample, which is 1.67%-1.71%.

[0069] Example 2

[0070] S1. Raw material selection: Select mineral components similar to real lunar soil as raw materials for simulating lunar soil;

[0071] S2. Sample preparation: Place the raw materials from step S1 into a container;

[0072] S3. Sample drying: Open the sample from step S2 and place it in an oven to dry; set the oven temperature to 140℃ and the drying time to 8h.

[0073] S4. Preparation of water-containing samples: The dried sample from step S3 is sealed and transported to the sample preparation environment for water vapor adsorption to obtain a water-containing sample. The sample preparation environment is a water-filled environment with the raw material sample evenly placed around the perimeter and the whole sample covered with an acrylic cover. The ambient temperature is 25℃ and the humidity is 45%. The sample is left to stand for 12 hours to obtain a water-containing sample of about 0.48wt%.

[0074] S5. Water Ice Sample Preparation: The water-containing sample from step S4 is transported to a glove box via a sealed bag and left to stand. Before placing the water-containing sample into the glove box, the sample chamber and the glove box are continuously filled with 99.999% industrial high-purity nitrogen. After the air in the sample chamber is exhausted, the nitrogen filling of the sample chamber is stopped, and liquid nitrogen is injected into the liquid nitrogen chamber to maintain a low-temperature stable environment in the sample chamber. After the sample preparation conditions are met, the glass cover of the liquid nitrogen chamber is closed, and the water-containing sample is transported to the glove box and left to stand for 5 minutes. After the sample temperature reaches equilibrium with the temperature inside the glove box, the sealed bag is removed, and the sample is weighed on an analytical balance. The sample is then resealed with a sealed bag and placed in the sample chamber for cooling for 5 minutes. The sealed bag is removed again, and the sample is now a simulated water ice lunar soil sample.

[0075] S6: Sample Re-drying: Remove the simulated water-ice lunar soil sample obtained in step S5 from the glove box, open the lid, and place it in an oven for re-drying. Set the oven temperature to 140℃ and the drying time to 8 hours. According to calculations, this sample is the simulated water-ice lunar soil sample with a specific mass fraction range. The specific operation for the specific mass fraction range of the water-ice lunar soil sample is as follows:

[0076] In step S2, the container is a covered container. Before placing the simulated lunar soil raw material into the container, the container is covered and weighed, recorded as M0 = 49.273g. After drying in step S3, the container is covered and weighed quickly, recorded as M1 = 99.904g. In step S5, after the temperature of the water-containing sample reaches equilibrium with the temperature of the glove box, the sample is placed on the analytical balance inside the glove box and weighed, recorded as M2 = 100.146g. In step S6, after the sample is dried again, the container is covered and weighed quickly, recorded as M3 = 99.850g.

[0077] The calculation formula is as follows:

[0078]

[0079] V1=min(P1,P2), V2=max(P1,P2)

[0080] V = [V1, V2]

[0081] Wherein, P1 is the mass fraction calculated based on the first drying as the background, P2 is the mass fraction calculated based on the second drying as the background, V1 is the minimum water ice content of the sample, V2 is the maximum water ice content of the sample, and V is the mass fraction range of the prepared water-containing simulated sample, which is 0.48%-0.60%.

[0082] Example 3

[0083] S1. Raw material selection: Select mineral components similar to real lunar soil as raw materials for simulating lunar soil;

[0084] S2. Sample preparation: Place the raw materials from step S1 into a container;

[0085] S3. Sample drying: Open the sample from step S2 and place it in an oven to dry; set the oven temperature to 140℃ and the drying time to 8h.

[0086] S4. Preparation of water-containing samples: The dried sample from step S3 is sealed and transported to the sample preparation environment for water vapor adsorption to obtain a water-containing sample. The sample preparation environment is a laboratory environment with an ambient temperature of 25℃ and a humidity of 45%. After standing for 10 minutes, a water-containing sample of approximately 0.27wt% is obtained.

[0087] S5. Water Ice Sample Preparation: The water-containing sample from step S4 is transported to a glove box via a sealed bag and left to stand. Before placing the water-containing sample into the glove box, the sample chamber and the glove box are continuously filled with 99.999% industrial high-purity nitrogen. After the air in the sample chamber is exhausted, the nitrogen filling of the sample chamber is stopped, and liquid nitrogen is injected into the liquid nitrogen chamber to maintain a low-temperature stable environment in the sample chamber. After the sample preparation conditions are met, the glass cover of the liquid nitrogen chamber is closed, and the water-containing sample is transported to the glove box and left to stand for 5 minutes. After the sample temperature reaches equilibrium with the temperature inside the glove box, the sealed bag is removed, and the sample is weighed on an analytical balance. The sample is then resealed with a sealed bag and placed in the sample chamber for cooling for 5 minutes. The sealed bag is removed again, and the sample is now a simulated water ice lunar soil sample.

[0088] S6: Sample Re-drying: Remove the simulated water-ice lunar soil sample obtained in step S5 from the glove box, open the lid, and place it in an oven for re-drying. Set the oven temperature to 140℃ and the drying time to 8 hours. According to calculations, this sample is the simulated water-ice lunar soil sample with a specific mass fraction range. The specific operation for the specific mass fraction range of the water-ice lunar soil sample is as follows:

[0089] In step S2, the container is a covered container. Before placing the simulated lunar soil raw material into the container, the container is covered and weighed, recorded as M0 = 50.22g. After drying in step S3, the container is covered and weighed quickly, recorded as M1 = 87.82g. In step S5, after the temperature of the water-containing sample reaches equilibrium with the temperature of the glove box, the sample is placed on the analytical balance inside the glove box and weighed, recorded as M2 = 87.92g. After drying the sample again in step S6, the container is covered and weighed quickly, recorded as M3 = 87.81g.

[0090] The calculation formula is as follows:

[0091]

[0092] V1=min(P1,P2), V2=max(P1,P2)

[0093] V = [V1, V2]

[0094] Wherein, P1 is the mass fraction calculated based on the first drying as the background, P2 is the mass fraction calculated based on the second drying as the background, V1 is the minimum water ice content of the sample, V2 is the maximum water ice content of the sample, and V is the mass fraction range of the prepared water-containing simulated sample, which is 0.27%-0.28%.

[0095] The present invention proposes a method for preparing simulated water ice lunar soil under multiple working conditions and with different water contents. After preparing water ice lunar soil with different water contents using this method, the detection threshold of the lunar soil water ice in-situ detection sensor is verified to achieve detection threshold verification under different working conditions.

[0096] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A method for preparing simulated water-ice lunar soil under multiple working conditions and with multiple moisture contents, characterized in that, Specifically, the following steps are included: S1. Raw material selection: Select mineral components similar to real lunar soil as raw materials for simulating lunar soil; S2. Sample preparation: Place the raw materials from step S1 into a container; S3. Sample drying: Place the sample from step S2 into an oven to dry. S4. Preparation of water-containing samples: The dried sample from step S3 is sealed and transported to the sample preparation environment for water vapor adsorption to obtain a water-containing sample. S5. Preparation of water ice sample: The water-containing sample from step S4 is transported to a glove box through a sealed bag and allowed to stand until the temperature inside the glove box reaches equilibrium. Then, it is placed in the sample chamber for cooling and the sealed bag is removed. This is the simulated water ice lunar soil sample. The equipment for preparing the simulated water ice lunar soil sample includes a non-standard liquid nitrogen tank, a glove box, a glass cover, and a nitrogen cylinder. The non-standard liquid nitrogen tank includes a sample chamber, a liquid nitrogen chamber, a low-pressure liquid nitrogen cylinder, and a controller. The nitrogen cylinder is connected to the sample chamber and the inner cavity of the glove box through pipes. The sample chamber and the glove box are spatially isolated by the glass cover. The liquid nitrogen chamber is fitted onto the sample chamber. The low-pressure liquid nitrogen cylinder is connected to the liquid nitrogen chamber through another pipe. The controller automatically controls the liquid level height in the liquid nitrogen chamber. S6: Sample re-drying: Take the simulated water ice and soil sample obtained in step S5 out of the glove box, open the lid and place it in the oven to dry again.

2. The method for preparing simulated water-ice lunar soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, In steps S3 and S6, the oven temperature is set to 130-150℃ and the baking time is set to 6-10h.

3. The method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, In step S4, the sample preparation environment is as follows: water is placed in the middle, raw material samples are evenly placed around the perimeter, and the whole sample is covered with an acrylic cover. The ambient temperature is controlled at 25-30℃, the ambient humidity at 40-50%, and the water temperature inside the acrylic cover is kept at 40℃. The sample is left to stand for 24-48 hours to obtain a water content sample with a mass fraction of 0.8wt%-2.0wt%.

4. The method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, In step S4, the sample preparation environment is as follows: water is placed in the middle, raw material samples are evenly placed around the perimeter, and the whole sample is covered with an acrylic cover. The ambient temperature is controlled at 20-25℃, the ambient humidity at 40-50%, and the water temperature inside the acrylic cover is kept at room temperature. The sample is left to stand for 6-24 hours to obtain a water content sample with a mass fraction of 0.4wt%-0.8wt%.

5. The method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, In step S4, the sample preparation environment is controlled at an ambient temperature of 20-25℃ and an ambient humidity of 40-50%. The raw material sample is exposed to the external environment and left to stand for 5-30 minutes to obtain a water-containing sample with a mass fraction of 0.2wt%-0.4wt%.

6. The method for preparing simulated water-ice lunar soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, The glove box is also equipped with a thermometer, hygrometer and an analytical balance.

7. The method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, The sample chamber is equipped with a temperature monitor that monitors the temperature inside the sample chamber in real time. The temperature monitor displays the temperature inside the sample chamber in real time through a controller.

8. The method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents according to claim 1, characterized in that, In step S5, before sending the water-containing sample to the glove box, the sample chamber and the glove box are continuously filled with 99.999% industrial high-purity nitrogen. After the air in the sample chamber is exhausted, the nitrogen filling of the sample chamber is stopped, and liquid nitrogen is injected into the liquid nitrogen chamber to maintain a low-temperature stable environment in the sample chamber. After the sample preparation conditions are met, the glass cover of the liquid nitrogen chamber is closed, and the water-containing sample is transported to the glove box and left to stand for 4-6 minutes. After the sample temperature reaches equilibrium with the temperature inside the glove box, the sealing bag is removed, and the sample is weighed on an analytical balance. The sample is then resealed with a sealing bag and placed in the sample chamber to cool for 4-6 minutes. The sealing bag is removed again. This sample is the simulated water-ice lunar soil sample with a specific mass fraction range.

9. The method for preparing simulated water-ice-moon soil under multiple working conditions and with multiple moisture contents according to claim 8, characterized in that, The specific procedures for handling the specific mass fraction range of the water ice lunar soil sample are as follows: The container in step S2 is a covered container. The raw material simulating lunar soil is weighed and recorded as M0 before being put into the container. After the drying process in step S3 is completed, cover the container, weigh it quickly, and record the weight as M1. After the sample temperature and the glove box temperature reach equilibrium in step S5, the sample is placed on the analytical balance inside the glove box and weighed, and recorded as M2. After the sample is dried again in step S6, cover it and weigh it quickly to get M3. The calculation formula is as follows: Wherein, P1 is the mass fraction calculated based on the first drying as the background, P2 is the mass fraction calculated based on the second drying as the background, V1 is the minimum water ice content of the sample, V2 is the maximum water ice content of the sample, and V is the mass fraction range of the prepared water-containing simulated sample.

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