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CN113253361A - Testing device for extreme low-temperature physical properties of lunar soil water ice - Google Patents

Testing device for extreme low-temperature physical properties of lunar soil water ice Download PDF

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CN113253361A
CN113253361A CN202110410705.0A CN202110410705A CN113253361A CN 113253361 A CN113253361 A CN 113253361A CN 202110410705 A CN202110410705 A CN 202110410705A CN 113253361 A CN113253361 A CN 113253361A
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vacuum
low temperature
water ice
temperature
experimental chamber
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CN113253361B (en
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李丽芳
张伟伟
王双雨
姜生元
陈化智
刘君巍
邓宗全
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Harbin Institute of Technology Shenzhen
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Abstract

本发明提出一种月壤水冰极端低温物性测试装置,该测试装置包括制冷系统、真空系统和真空低温实验舱,真空低温实验舱位于真空系统内部,制冷系统与真空低温实验舱连接;真空低温实验舱的导冷样品台放置在实验舱舱体中,所述导冷样品台与多级冷头相连,密封样本盒和温控加热片放置在导冷样品台上,温控加热片上设置有被测传感器,密封样本盒被分为若干个独立单元,每个独立单元中放置水冰样本和被测传感器;解决现有技术没有能实现月球极端低温真空环境的实验装置的技术问题。本发明能够模拟如此苛刻的月球环境,是国内第一次对水冰探测的传感器件进行测试,填补了国内对于水冰探测的空白,对于我国追赶国际太空探索水平有着重大意义。

Figure 202110410705

The invention provides a test device for the extreme low temperature physical properties of lunar soil water ice. The test device includes a refrigeration system, a vacuum system and a vacuum low temperature experimental chamber. The vacuum low temperature experimental chamber is located inside the vacuum system, and the refrigeration system is connected with the vacuum low temperature experimental chamber; The cooling-conducting sample stage of the experimental cabin is placed in the experimental cabin, and the cooling-conducting sample stage is connected with the multi-stage cold head. The tested sensor, the sealed sample box is divided into several independent units, and the water ice sample and the tested sensor are placed in each independent unit; it solves the technical problem that the existing technology does not have an experimental device that can realize the extreme low temperature vacuum environment of the moon. The invention can simulate such harsh lunar environment, is the first time in China to test the sensor device for water ice detection, fills the blank of water ice detection in China, and has great significance for my country to catch up with the international space exploration level.

Figure 202110410705

Description

Testing device for extreme low-temperature physical properties of lunar soil water ice
Technical Field
The invention relates to a testing device for extreme low-temperature physical properties of lunar soil water ice, and belongs to the technical field of lunar soil testing devices.
Background
The exploration of the moon water ice is bound to face extreme environments such as vacuum and extremely low temperature, and in order to guarantee the performance of the sensor used for the exploration, the performance of the sensor under the extreme environments needs to be verified on the ground by a performance verification device, and the performance of the sensor under different conditions needs to be verified. However, because the required extreme environment is too harsh, no experimental device capable of realizing such an extremely low-temperature vacuum environment exists at present.
Disclosure of Invention
The invention provides a testing device for extreme low-temperature physical properties of lunar soil water ice, aiming at solving the technical problem that no experimental device capable of realizing an extreme low-temperature vacuum environment of a moon exists in the prior art.
The invention provides a testing device for extreme low-temperature physical properties of lunar soil water ice, which comprises a refrigerating system, a vacuum system and a vacuum low-temperature experiment chamber, wherein the vacuum low-temperature experiment chamber is positioned in the vacuum system, and the refrigerating system is connected with the vacuum low-temperature experiment chamber and used for refrigerating the vacuum low-temperature experiment chamber;
the refrigeration system mainly comprises a low-temperature refrigerator and a multi-stage cold head, wherein the low-temperature refrigerator is connected with the vacuum low-temperature experiment chamber through the multi-stage cold head;
the vacuum low-temperature experiment cabin comprises an experiment cabin body, a cold guide sample table, a sealed sample box and a temperature control heating sheet, wherein the cold guide sample table is placed in the experiment cabin body, the cold guide sample table is connected with a multi-stage cold head, the sealed sample box and the temperature control heating sheet are placed on the cold guide sample table, a sensor to be tested is arranged on the temperature control heating sheet, the sealed sample box is divided into a plurality of independent units, and a water ice sample and a sensor to be tested are placed in each independent unit;
the vacuum system comprises a vacuum cover and a cold screen, wherein the cold screen is arranged in the vacuum cover, an experiment cabin body is arranged in the cold screen, and a sensor measuring interface is arranged on the vacuum cover.
Preferably, a base is connected below the vacuum cover through a vacuum cover flange.
Preferably, the outer surfaces of the cold screen and the vacuum low-temperature experiment cabin are subjected to gold plating treatment, and the inner surfaces of the cold screen and the vacuum low-temperature experiment cabin are coated with heat sink black paint.
Preferably, the multistage cold head cools down step by step, finally transmits extreme low temperature to the vacuum low temperature experiment cabin.
Preferably, a cold conducting copper block is arranged below the cold conducting sample table and connected with the multistage cold head.
The testing device for extreme low-temperature physical properties of the lunar soil water ice has the beneficial effects that:
1. the sealed sample box comprises five layers of independent units, so that position decoupling and distribution decoupling are facilitated.
2. The invention can simulate the harsh lunar environment, is a first time of testing the sensing device for water ice detection in China, fills the blank of water ice detection in China, and has great significance for pursuing the international space exploration level in China.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic diagram of an internal structure of a testing device for extreme low-temperature physical properties of lunar soil water ice according to the present invention;
FIG. 2 is a schematic diagram of an external structure of a testing device for extreme low-temperature physical properties of lunar soil water ice according to the present invention;
wherein, 1-cold shielding; 2-an experiment cabin body; 3-sealing the sample box; 4-a sensor measurement interface; 5-a base; 6-a cryogenic refrigerator; 7-multi-stage cold head; 8-vacuum hood flange; 9-cold conducting copper blocks; 10-temperature control heating sheet; 11-a sensor under test; 12-vacuum hood.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
the first embodiment is as follows: the present embodiment is explained with reference to fig. 1-2. The testing device for extreme low-temperature physical properties of lunar soil water ice in the embodiment comprises a refrigerating system, a vacuum system and a vacuum low-temperature experiment chamber, wherein the vacuum low-temperature experiment chamber is positioned in the vacuum system, the refrigerating system is connected with the vacuum low-temperature experiment chamber and used for refrigerating the vacuum low-temperature experiment chamber, and a thermal control system is positioned outside the vacuum low-temperature experiment chamber;
the refrigerating system mainly comprises a low-temperature refrigerator 6 and a multi-stage cold head 7, wherein the low-temperature refrigerator 6 is connected with the vacuum low-temperature experiment chamber through the multi-stage cold head 7;
the vacuum low-temperature experiment chamber comprises an experiment chamber body, a cold guide sample table, a sealed sample box 3 and a temperature control heating sheet 10, wherein the cold guide sample table is placed in the experiment chamber body, the cold guide sample table is connected with a multistage cold head 7, the sealed sample box 3 and the temperature control heating sheet 10 are placed on the cold guide sample table, a sensor 11 to be tested is arranged on the temperature control heating sheet 10, the sealed sample box 3 is divided into a plurality of independent units, and a water ice sample and the sensor 11 to be tested are placed in each independent unit;
the vacuum system comprises a vacuum cover 12 and a cold screen 1, wherein the cold screen 1 is arranged in the vacuum cover 12, an experimental cabin body is arranged in the cold screen 1, and a sensor measuring interface is arranged on the vacuum cover 12.
A base 5 is connected below the vacuum cover 12 through a vacuum cover flange 8.
The measured sensor 11 can be replaced by different sensors according to different experiments.
The multistage cold head 7 cools down step by step, and finally extremely low temperature is transmitted to the vacuum low temperature experiment cabin.
And a cold guide copper block 4 is arranged below the cold guide sample table, and the cold guide copper block 4 is connected with a multistage cold head 7.
The outer surfaces of the cold screen 1 and the vacuum low-temperature experiment chamber are plated with gold to reduce heat leakage, the inner surfaces of the cold screen 1 are coated with heat sink black paint, and the cold screen 1 is used for keeping vacuum and low temperature.
Wherein, the inside of the upper vacuum hood 2 is a cold shield 1, and the inner side of the cold shield 1 is an experiment chamber 10. The inner and outer layer mechanisms are adopted to simulate an extremely low temperature environment as much as possible, wherein the thermodynamic temperature in the cold shield 1 can reach 40K, and the thermodynamic temperature in the hot vacuum chamber can reach 50K. The junction of vacuum cup 2 is provided with the sealing ring, and the effect of vacuum cup 2 and sealing ring is for keeping the condition of vacuum, and vacuum cup 2 links to each other with the molecular pump, can be with the air in the extraction vacuum cup 2 when the experiment begins, and vacuum cup 2 inside can reach certain vacuum degree when the guarantee experiment.
The sample and the detected sensing device required by the experiment are placed on the cold guide sample table, the cold guide sample table is characterized in that the cold guide sample table is connected with a cold guide copper block 9, the cold guide copper block 9 is connected with a multistage cold head 7, in order to ensure the working efficiency, each device is tightly attached to the cold guide sample table, and meanwhile, the instrument is connected with the experimental device through a sensor measurer interface 4, so that the temperature of each cabin can be monitored in real time.
In order to verify the performance of the measured sensor 11, two types of experiments need to be completed, namely the experiment for directly verifying the tolerance of the sensor in a vacuum, low-temperature and anhydrous environment, and the experiment for verifying the tolerance of an instrument in lunar soil with different water contents.
In order to verify the performance of the sensor 11 under different conditions, a sample library is established, lunar soil water ice samples with different water contents and mean values of compactness are configured, low-temperature freezing treatment is performed, then a calibrated sensor device is used for performing comprehensive physical property test, and the water contents, the freezing temperature and the compactness are continuously changed for performing the test, so that the mapping relation between the temperature, the water contents, the compactness and the comprehensive physical property can be obtained.
The sealed sample box 3 is divided into five independent units, and a water ice sample with known comprehensive physical properties and a calibrated sensing device are placed on each layer so as to carry out position decoupling and distribution decoupling. The tested sensor 11 is kept in full contact with the water ice sample during the experiment, and the performance of the sensing device in the extreme environment can be judged whether to meet the index or not by comparing and analyzing the measured data and the known physical property parameters of the sample after the experiment is finished.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1.一种月壤水冰极端低温物性测试装置,其特征在于,包括制冷系统、真空系统和真空低温实验舱,所述真空低温实验舱位于真空系统内部,所述制冷系统与真空低温实验舱连接,为其制冷,1. a lunar soil water ice extreme low temperature physical property testing device, is characterized in that, comprises refrigeration system, vacuum system and vacuum low temperature experimental chamber, described vacuum low temperature experimental chamber is located inside vacuum system, described refrigeration system and vacuum low temperature experimental chamber connected, to cool it, 所述制冷系统主要包括低温制冷机(6)和多级冷头(7),所述低温制冷机(6)通过多级冷头(7)与真空低温实验舱连接;The refrigeration system mainly includes a low-temperature refrigerator (6) and a multi-stage cold head (7), and the low-temperature refrigerator (6) is connected to the vacuum low-temperature experimental chamber through the multi-stage cold head (7); 所述真空低温实验舱包括实验舱舱体、导冷样品台、密封样本盒(3)和温控加热片(10),所述导冷样品台放置在实验舱舱体中,所述导冷样品台与多级冷头(7)相连,密封样本盒(3)和温控加热片(10)放置在导冷样品台上,所述温控加热片(10)上设置有被测传感器(11),所述密封样本盒(3)被分为若干个独立单元,每个独立单元中放置水冰样本和被测传感器(11);The vacuum and low temperature experimental chamber comprises an experimental chamber body, a cooling-conducting sample stage, a sealed sample box (3) and a temperature-controlled heating sheet (10), the cooling-conducting sample stage is placed in the experimental chamber body, and the cooling-conducting sample stage is placed in the experimental chamber body. The sample stage is connected to the multi-stage cold head (7), the sealed sample box (3) and the temperature-controlled heating sheet (10) are placed on the cooling-conducting sample stage, and the temperature-controlled heating sheet (10) is provided with a tested sensor ( 11), the sealed sample box (3) is divided into several independent units, and the water ice sample and the measured sensor (11) are placed in each independent unit; 所述真空系统包括真空罩(12)和冷屏(1),所述真空罩(12)内设置有冷屏(1),所述冷屏(1)内设置有实验舱舱体,所述真空罩(12)上设置有传感器测量接口。The vacuum system comprises a vacuum cover (12) and a cold shield (1), a cold shield (1) is arranged in the vacuum shield (12), an experimental cabin body is arranged in the cold shield (1), and the A sensor measurement interface is arranged on the vacuum cover (12). 2.根据权利要求1所述的月壤水冰极端低温物性测试装置,其特征在于,所述真空罩(12)下方通过真空罩法兰(8)连接有基座(5)。2 . The device for testing extreme low temperature physical properties of lunar soil water ice according to claim 1 , wherein a base ( 5 ) is connected under the vacuum cover ( 12 ) through a vacuum cover flange ( 8 ). 3 . 3.根据权利要求1所述的月壤水冰极端低温物性测试装置,其特征在于,所述冷屏(1)和真空低温实验舱的外表面进行镀金处理,内表面均涂热沉黑漆。3. lunar soil water ice extreme low temperature physical property testing device according to claim 1, is characterized in that, the outer surface of described cold shield (1) and vacuum low temperature experimental chamber is carried out gold plating treatment, and inner surface is all coated with heat sink black paint . 4.根据权利要求1所述的月壤水冰极端低温物性测试装置,其特征在于,所述多级冷头(7)逐级降温,最终将极端低温传递到真空低温实验舱内。4. The lunar soil water ice extreme low temperature physical property testing device according to claim 1, characterized in that, the multi-stage cold head (7) cools down step by step, and finally transfers the extreme low temperature into the vacuum low temperature experimental chamber. 5.根据权利要求1所述的月壤水冰极端低温物性测试装置,其特征在于,所述导冷样品台的下方设置有导冷铜块(4),所述导冷铜块(4)与多级冷头(7)相连。5. The lunar soil water ice extreme low temperature physical property testing device according to claim 1, characterized in that a cooling-conducting copper block (4) is provided below the cooling-conducting sample stage, and the cooling-conducting copper block (4) Connected to the multi-stage cold head (7).
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CN113624063A (en) * 2021-08-17 2021-11-09 中国科学院合肥物质科学研究院 A kind of manufacturing method of low temperature helium chamber with large heat exchange and low flow resistance
CN113920804A (en) * 2021-09-26 2022-01-11 哈尔滨工业大学 A large-scale multi-factor space irradiation environment integrated simulation device and simulation method
CN115343326A (en) * 2022-07-01 2022-11-15 哈尔滨工业大学 Device and method for measuring thermal characteristics of low-temperature vacuum ice-containing soil simulant
CN115876971A (en) * 2022-12-30 2023-03-31 中国科学院地质与地球物理研究所 A method for online calibration of water ice sample analyzer in vacuum low temperature environment

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