CN1580763A - Transparent down pipe for analogue micro gravity experiment - Google Patents
Transparent down pipe for analogue micro gravity experiment Download PDFInfo
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- CN1580763A CN1580763A CN 03133621 CN03133621A CN1580763A CN 1580763 A CN1580763 A CN 1580763A CN 03133621 CN03133621 CN 03133621 CN 03133621 A CN03133621 A CN 03133621A CN 1580763 A CN1580763 A CN 1580763A
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- pipe
- falling tube
- simulated microgravity
- experiment
- microgravity experiment
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Abstract
The present invention provides a transparent falling tube for simulation microgravity experiment. It is characterized by that said falling tube is formed from the components of melting chamber, tube body, sample collection chamber, vacuum system and temperature-controlling and temperature-measuring system. The falling tube tube-body adopts transparent quartz glass tube, the melting chamber is positioned in the top portion of falling tube, and sample collection chamber is positioned in the bottom portion of falling tube, and the vacuum system is composed of upper and lower two portions, and the temperature-measuring system is formed from two portions of its intenal temperature-measuring system and external temperature-measuring system. The provided microgravity condition can be up to the microgravity level of 10 to minus sixth gO under the condition of high vacuum level.
Description
Technical field:
The present invention relates to carry out the device of material science simulated experiment, be specially the device that is used for the experiment of virtual space metal alloy.
Background technology:
Material science research under space that is the microgravity condition starts from sixties end.Along with deepening continuously of research, people clearly recognize: the space material preparation may be the important means that improves material property, especially has more key for the advanced person with substantial progress strategic technology.Must possess some basic research technique and conditions yet carry out this type of research, at first need to solve microgravity environment of construction.
The source of microgravity environment can be divided into ground simulation system, flight test system and track experiment system three classes at present.Wherein the ground simulation experiment is to study the preliminary work of doing with materials processing on space orbit, and its final purpose is to realize suitability for industrialized production in the space.Track experiment then is to the groping on the spot of space industry, therefore industrialized only way, implementation space just.For effectively utilizing the chance of expensive space experiment, must carry out beforehand research work in advance on ground, utilization ground simulation system can estimate many spaces experiment parameter, thereby makes space work more effective.The pipe that falls is the main laboratory facilities that the simulated microgravity experiment is carried out on ground.The microgravity condition that the pipe that falls provides can reach 10 under higher vacuum
-6g
0The microgravity level, in the pipe that falls even not existing movable caused disturbance in the space station because of the cosmonaut; Easily-controlled experimental conditions in the pipe falls in addition, the simulated experiment cycle is also short, can carry out once in one day or experiment for several times, therefore, the pipe that falls becomes the important means of carrying out the material science simulated experiment, and its scientific value just is that it is the laboratory facilities of glitch-free no container processes under a kind of simulated microgravity condition.
Summary of the invention:
The invention provides a kind of simulated microgravity experiment and use transparent falling tube, it is characterized in that: the pipe that falls partly is made of working chamber (1), body, sample collection room (1), vacuum system and temperature control, temp measuring system etc.; The body that falls adopts transparent tube, and working chamber (1) is positioned at the pipe top, and sample collection room is positioned at the pipe bottom, and vacuum system is made of upper and lower two parts, and temp measuring system is made up of thermometric (11) in the pipe and pipe outer thermometric (12) two parts.
Described simulated microgravity experiment is a tungsten filament with the heater (2) of the working chamber (1) of transparent falling tube, and sample hangs in the middle of the spiral heater (2), and after the sample fusing, its weight will overcome surface tension and free falling.
The experiment of described simulated microgravity has a stainless steel sample reception dish (13) with collecting chamber (14) lining of transparent falling tube, fills a small amount of silicone oil in the dish, after being convenient to solidify the quick cooling of product.
Described simulated microgravity experiment is made of upper and lower two parts with the vacuum system of transparent falling tube, two A-3 turbomolecular pumps, two mechanical pumps and a titanium sublimation pump are arranged at top (3), an A-3 turbomolecular pump and a mechanical pump are arranged at bottom (15), constituted the whole pumped vacuum systems of the pipe that falls, this vacuum system can make pipe vacuum tightness to reach 10
-4Pa.
Use the body middle part of transparent falling tube to also have a getter pump (8) in described simulated microgravity experiment, keep system as vacuum, it is used for keeping falling to managing inner vacuum after vacuum system quits work up and down, make and to recover vacuum rapidly when testing once more, increase work efficiency.
Described simulated microgravity experiment is formed by connecting with the method that is flexible coupling by the transparent quartz glass tube of more piece (6) with the body of transparent falling tube, and quartz glass so just can be realized the outer thermometric of infrared tube and analyze molten drop temperature field distribution situation ultrared transmissivity height; Employing is flexible coupling in order to avoid quartz glass tube (6) is subjected to external force such as temperature variation, vibrations to produce stress and damages.
Described simulated microgravity experiment is formed by connecting with the method that is flexible coupling by more piece quartz ampoule (6) and more piece stainless-steel tube (7) with the body of transparent falling tube, uses stainless steel can save funds as the part body.
Described simulated microgravity experiment has aerating device with transparent falling tube, charges into argon, nitrogen or other inert gas in the pipe in the past, improves the degree of supercooling of material, accelerates the setting rate of sample in dropping process.
Described simulated microgravity experiment comprises trigger, signal sensor, computer control system and data acquisition system (DAS) with temperature measurement fraction (11) in the pipe of transparent falling tube; Manage outer temperature measurement fraction (12) and adopt thermal infrared imager.
Described simulated microgravity experiment is made up of PbS detector and Computer signal identification circuit with the trigger of temperature measurement fraction in the transparent falling tube pipe; Signal sensor is two PbS probes that lay respectively at different parts in the pipe.
The advantage of transparent falling tube provided by the present invention is: the microgravity condition that provides can reach 10 under higher vacuum
-6g
0The microgravity level; In the pipe that falls not in the space station because of cosmonaut's movable caused disturbance; In addition fall easily-controlled experimental conditions in the pipe, the simulated experiment cycle is also short, can carry out once in one day or experiment for several times.
Description of drawings:
Fig. 1 is the transparent falling tube synoptic diagram;
Fig. 2 is the connector synoptic diagram of quartz glass tube and quartz glass tube;
Fig. 3 is the connector synoptic diagram of quartz glass tube and metal tube;
Fig. 4 is a Cu molten drop natural cooling curve in a vacuum;
Fig. 5 is the radiation curve in the Cu molten drop dropping process that records of PbS detector;
Fig. 6 is the infrared image of Ag-Cu molten drop dropping process;
Fig. 7 is an Ag-Cu molten drop temperature three-dimensional distribution map;
Fig. 8 is an Ag-Cu molten drop temperature flat distribution map;
Fig. 9 falls to managing gravity test gained Ag-Cu alloy microstructure overall picture.
Embodiment:
The important technological parameters of pipe of falling is as follows:
Highly: 19.9m
Internal diameter: 150mm
Heating-up temperature :～1300 ℃
Vacuum tightness :～10
-4Pa
The microgravity time: 2sec
Microgravity level :～10
-6g
0
The pipe that falls partly is made of working chamber (1), body, sample collection room (14), vacuum system and temperature control, temp measuring system etc.
Working chamber (1) is positioned at the pipe top, and its major function is heat fused and release test sample.Working chamber (1) adopts high current resistance heating mode, and (50V, 110A), heater (2) is a diameter phi 0.8mm tungsten filament.Sample hangs in the middle of the spiral heater (2) during heating, adopts low-voltage, big electric current, can be rapidly heated 1300 ℃ within about 15 seconds, will sample surfaces be polluted like this.After the sample fusing, its weight will overcome surface tension and free falling.
The body that falls is formed by connecting with connector (5,9,12) by quartz ampoule (6) and stainless-steel tube (7).Connector (5) is made of gland (22), Connection Block (25) and connecting screw rod (21) as shown in Figure 2, is lined with fluorine O shape rubber ring (23) between gland (22) and quartz ampoule (6), is lined with beam (24) between Connection Block (25) and quartz ampoule (6).Connector (9) as shown in Figure 3, Connection Block (25) and connecting screw rod (21) by gland (22), band wedge angle (26) constitute, between gland (22) and quartz ampoule (6), be lined with fluorine O shape rubber ring (23), between Connection Block (25) and quartz ampoule (6), be lined with beam (24), between Connection Block (25) and metal tube (7), be lined with oxygen-free copper O-ring seal (27).Being flexible coupling has both guaranteed condition of high vacuum degree, plays effects such as antidetonation again.Originally the maximum characteristics of pipe of falling also just are to have used in right amount transparent quartz glass tube (6), at distance top 1.4m and 12.2m place 3m and the long quartz ampoule (6) of 7m have been installed respectively.Why select for use quartz glass tube (6) to be because quartz glass to the transmissivity height of red place line, so just can be realized the outer thermometric of infrared tube and analyze molten drop temperature field distribution situation.Using stainless-steel tube (7) is for saving funds and some other technical reason as the main cause of part body.
Sample collection room (14) is positioned at pipe bottom one big vacuum chamber, and a stainless steel sample reception dish (13) is arranged in the cavity, fills a small amount of silicone oil in the dish, and the sample after being convenient to solidify cools off fast.After the off-test, open the vacuum chamber valve gap sample reception dish is outwards pulled out via guide rail, sample can be taken out.
Fall pipe vacuum system by last (3), in (8), down (15) three parts constitute.Two A-3 turbomolecular pumps, two mechanical pumps and a titanium sublimation pump are arranged at top (3), and bottom (15) have an A-3 turbomolecular pump and a mechanical pump.They have constituted the whole pumped vacuum systems of the pipe that falls.Also have a getter pump (8) at the middle part of the pipe that falls, keep system as vacuum, it is used for keeping falling to managing inner vacuum after vacuum system (3,15) quits work up and down, make and can recover vacuum rapidly when testing once more, increases work efficiency.Whole vacuum system can make pipe vacuum tightness to reach 10
-4Pa.In addition, for improving the degree of supercooling of material, quicken the setting rate of sample in dropping process, the pipe that falls also has aerating device, can charge into gases such as argon, nitrogen in pipe, to satisfy various testing requirementss.
Falling to managing temp measuring system is made up of two parts (11,12).
The fundamental purpose of thermometric is to determine the solidifying point of sample in the pipe.Usually because the release of latent heat will cause heat radiation to increase, this phenomenon is called " recalescence " again to sample when solidifying.Thermometric realizes that based on this point it mainly comprises parts such as triggering, acquisition of signal, computer control and data acquisition in the pipe.
Since thermometric to as if aloft sample, thereby adopt non-contacting thermometric mode, this mode to require detector to have high resolution and fast speed responsive.Native system adopts PbS film light photoconductive detector, and its spectral range is 2.45 μ m～3.2 μ m, and time constant is 400 μ s, and working area is 1 * 1mm
2
The triggering part of thermometric is made up of PbS detector and Computer signal identification circuit in the pipe.Except a PbS pops one's head in as the trigger, also different parts has settled two PbS probes as signal sensor respectively in the pipe that falls.Data acquisition system (DAS) is made up of corresponding hardware and software kit.During test, when sample is heated to proper temperature when prepare, start capture program, in case computing machine receives sample light trigger pip, it is acquired signal exactly at a certain time interval just.The data that collect can instant playback on computer screen, also can deposit and carry out aftertreatment.
The Cu molten drop that records natural cooling curve is in a vacuum seen Fig. 3, and the radiation curve in the Cu molten drop dropping process that records is seen Fig. 4.Utilize this radiation curve can determine easily that the time of recalescence appears in molten drop, find corresponding temperature then on cooling curve, this promptly is the freezing point temperature of molten drop.
Managing outer thermometric is to realize with the Model760 thermal infrared imager that American I nframetrics makes.Its main performance index is as follows:
Bands of a spectrum detector minimum detectable temperature difference precision
8-12 μ m, 3-5 μ m or 0.1 ℃ ± 2 ℃ of 3-12 μ m HfCdTe or ± 2%
Horizontal resolution sweep speed temperature-measuring range
256Pixels/Line level: 7812Hz, vertically: it can dynamically write down the infrared image of sample whereabouts and process of setting during 50Hz-20-+1500 ℃ of test, utilize the supporting ThermaGram heat picture analysis process system just can analytic sample warm field distribution situation at any one time subsequently, the infrared image of Ag-Cu molten drop dropping process be seen Fig. 6.Not only can obtain the warm field distribution situation of molten drop by analysis, see Fig. 7 and Fig. 8, through calculating molten drop whereabouts and cooling velocity and the microgravity level or the like of also can obtaining them.The Ag-Cu alloy microstructure overall picture that drop tube test obtained is seen Fig. 9.
Claims (10)
1, transparent falling tube is used in a kind of simulated microgravity experiment, and it is characterized in that: the pipe that falls partly is made of working chamber (1), body, sample collection room (14), vacuum system and temperature control, temp measuring system etc.; The body that falls adopts transparent tube, and working chamber (1) is positioned at the pipe top, and sample collection room (14) is positioned at the pipe bottom, and vacuum system is made of upper and lower two parts, and temp measuring system is made up of thermometric (11) in the pipe and pipe outer thermometric (12) two parts.
2, use transparent falling tube according to the described simulated microgravity experiment of claim 1, it is characterized in that: the heater (2) of described working chamber (1) is a tungsten filament, and sample hangs in the middle of the spiral heater (2).
3, use transparent falling tube according to the described simulated microgravity experiment of claim 1, it is characterized in that: the receiving plate (13) that fills silicone oil is arranged in described collecting chamber (14) lining.
4, according to the described simulated microgravity experiment of claim 1 transparent falling tube, it is characterized in that: described vacuum system is made of upper and lower two parts, two A-3 turbomolecular pumps, two mechanical pumps and a titanium sublimation pump are arranged at top (3), and bottom (15) collect part an A-3 turbomolecular pump and a mechanical pump.
5, use transparent falling tube according to the described simulated microgravity experiment of claim 4, it is characterized in that: there is a getter pump (8) at the middle part.
6, use transparent falling tube according to the described simulated microgravity experiment of claim 1, it is characterized in that: described body is formed by connecting with the method that is flexible coupling by the transparent quartz glass tube of more piece (6).
7, use transparent falling tube according to the described simulated microgravity experiment of claim 1, it is characterized in that: described body is formed by connecting with the method that is flexible coupling by more piece quartz ampoule (6) and more piece stainless-steel tube (7).
8, use transparent falling tube according to the described simulated microgravity experiment of claim 1, it is characterized in that: have aerating device at described body.
9, use transparent falling tube according to the described simulated microgravity experiment of claim 1, it is characterized in that: temperature measurement fraction in described pipe (11) comprises trigger, signal sensor, computer control system and data acquisition system (DAS); Manage outer temperature measurement fraction (12) and adopt thermal infrared imager.
10, use transparent falling tube according to the described simulated microgravity experiment of claim 9, it is characterized in that: described trigger is made up of PbS detector and Computer signal identification circuit; Signal sensor is two PbS probes that lay respectively at different parts in the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031336213A CN1306275C (en) | 2003-08-01 | 2003-08-01 | Transparent down pipe for analogue micro gravity experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031336213A CN1306275C (en) | 2003-08-01 | 2003-08-01 | Transparent down pipe for analogue micro gravity experiment |
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| Publication Number | Publication Date |
|---|---|
| CN1580763A true CN1580763A (en) | 2005-02-16 |
| CN1306275C CN1306275C (en) | 2007-03-21 |
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Cited By (8)
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| CN103323568A (en) * | 2013-06-26 | 2013-09-25 | 哈尔滨工业大学 | Material smelting and welding experimental apparatus under ground microgravity and methods for smelting and welding material under microgravity based on device |
| CN104303057A (en) * | 2012-03-03 | 2015-01-21 | 阿斯特里姆有限责任公司 | Method for performing immunoassays under weightless conditions |
| CN107966467A (en) * | 2017-11-24 | 2018-04-27 | 中国科学院金属研究所 | The experimental provision and experimental method of material solidification under a kind of research microgravity condition |
| CN109633194A (en) * | 2018-12-17 | 2019-04-16 | 北京卫星制造厂有限公司 | A kind of low gravitation sample container transmission accuracy test system and method |
| CN111272509A (en) * | 2020-03-02 | 2020-06-12 | 西北工业大学 | Electromagnetic suspension coupling free-fall metal material solidification forming device and method |
| CN114177652A (en) * | 2021-12-15 | 2022-03-15 | 成都瑞奇智造科技股份有限公司 | Sectional type adsorption column |
| CN114787893A (en) * | 2019-08-30 | 2022-07-22 | 亚利桑那州立大学董事会 | Universal ground weightlessness system |
| CN116129719A (en) * | 2023-01-09 | 2023-05-16 | 中国科学院国家空间科学中心 | System and method for performing microgravity capillary experiment by using facility with height drop |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0819495B2 (en) * | 1992-09-30 | 1996-02-28 | 工業技術院長 | Method and apparatus for melting and solidifying metallic material in microgravity field |
| US5702182A (en) * | 1996-07-24 | 1997-12-30 | Instrumentation Technology Associates, Inc. | Apparatus for mixing selected volumes of liquids |
| CN1058536C (en) * | 1996-12-27 | 2000-11-15 | 西北工业大学 | Ground simulation method and experiment equipment for spatial fast solidification |
| CN2334067Y (en) * | 1998-07-15 | 1999-08-18 | 李俊伦 | Microgravity experiment instrument |
| CN2387033Y (en) * | 1999-08-09 | 2000-07-12 | 中国科学院生物物理研究所 | Multifunctional clinostat for simulating micro-gravity biological effect |
| US6244113B1 (en) * | 1999-10-29 | 2001-06-12 | University Of Alabama In Huntsville | Method and apparatus for measuring microgravity acceleration |
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2003
- 2003-08-01 CN CNB031336213A patent/CN1306275C/en not_active Expired - Fee Related
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| CN104303057A (en) * | 2012-03-03 | 2015-01-21 | 阿斯特里姆有限责任公司 | Method for performing immunoassays under weightless conditions |
| CN104303057B (en) * | 2012-03-03 | 2016-03-09 | 空中客车Ds有限责任公司 | For carrying out the method for immunoassays in weightlessness |
| US9933340B2 (en) | 2012-03-03 | 2018-04-03 | Airbus Ds Gmbh | Method for performing immunoassays under weightlessness |
| CN103323568A (en) * | 2013-06-26 | 2013-09-25 | 哈尔滨工业大学 | Material smelting and welding experimental apparatus under ground microgravity and methods for smelting and welding material under microgravity based on device |
| CN107966467A (en) * | 2017-11-24 | 2018-04-27 | 中国科学院金属研究所 | The experimental provision and experimental method of material solidification under a kind of research microgravity condition |
| CN109633194A (en) * | 2018-12-17 | 2019-04-16 | 北京卫星制造厂有限公司 | A kind of low gravitation sample container transmission accuracy test system and method |
| CN114787893A (en) * | 2019-08-30 | 2022-07-22 | 亚利桑那州立大学董事会 | Universal ground weightlessness system |
| CN114787893B (en) * | 2019-08-30 | 2024-03-26 | 亚利桑那州立大学董事会 | Universal ground weightlessness system |
| CN111272509A (en) * | 2020-03-02 | 2020-06-12 | 西北工业大学 | Electromagnetic suspension coupling free-fall metal material solidification forming device and method |
| CN114177652B (en) * | 2021-12-15 | 2022-11-15 | 成都瑞奇智造科技股份有限公司 | Sectional type adsorption column |
| CN114177652A (en) * | 2021-12-15 | 2022-03-15 | 成都瑞奇智造科技股份有限公司 | Sectional type adsorption column |
| CN116129719A (en) * | 2023-01-09 | 2023-05-16 | 中国科学院国家空间科学中心 | System and method for performing microgravity capillary experiment by using facility with height drop |
| CN116129719B (en) * | 2023-01-09 | 2024-01-26 | 中国科学院国家空间科学中心 | System and method for performing microgravity capillary experiment by using facility with height drop |
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