CN102359905B - Multi-point testing system for dynamic surface magnetic field and thermal distribution of superconductor - Google Patents
Multi-point testing system for dynamic surface magnetic field and thermal distribution of superconductor Download PDFInfo
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- CN102359905B CN102359905B CN201110289973.8A CN201110289973A CN102359905B CN 102359905 B CN102359905 B CN 102359905B CN 201110289973 A CN201110289973 A CN 201110289973A CN 102359905 B CN102359905 B CN 102359905B
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Abstract
The invention discloses a multi-point testing system for the dynamic surface magnetic field and thermal distribution of a superconductor, which comprises a bracket consisting of a horizontally-arranged copper support plate and a vertically-arranged copper support bar; a vibration exciter, an aluminum tray and a superconductor testing device are sequentially arranged on the copper support plate in a bottom-top mode; and a height-adjustable aluminium beam, a permanent magnet hung on the aluminum beam and a permanent magnet fixed bolt for fixing the permanent magnet on the aluminium beam are horizontally arranged on the copper support bar. By using the multi-point testing system for the dynamic surface magnetic field and thermal distribution of a superconductor disclosed by the invention, the defects in the prior art that a deformation measuring sensor is poor in adaptability, poor in validity of measured data, poor in measurement accuracy, low in detection precision and the like can be overcome, thereby achieving the advantages that a deformation measuring sensor is good in adaptability, good in validity of measured data, good in measurement accuracy and high in detection precision.
Description
Technical field
The present invention relates to superconductor Performance Testing Technology, particularly, relate to the multi-point test system of a kind of superconductor dynamic surface magnetic field and heat distribution.
Background technology
Superconducting phenomenon is not strange to us, and the landmark breakthrough each time of superconductor field all can attract almost all people's sight, all because its unique physical property and tempting application prospect.In fact, Superconductor Physics and material scholar respectively with regard to Superconductor Physics mechanism, how to improve superconducting critical parameters and seek new superconductor etc. and be separately close to for it a century.The low temperature superconducting material of development and application be accompanied by to(for) the research of superconductor and Problems of Structural Mechanics are opened, the normal need of work utmost point of superconductor low temperature environment (low-temperature superconducting 4.2K, liquid helium cooler environment; High-temperature superconductor-77K, cooled with liquid nitrogen environment), the mechanical characteristic of superconductor under this low temperature environment is as Young modulus, thermal conductivity, and fracture toughnesses etc. and the dependence rule for temperature, magnetic field thereof, be the basic mechanical problem of superconductor and structural mechanics.
At present, domestic superconducting experiment mainly concentrates on the suspending power measurement aspect of high-temperature superconductor suspension system, in the world in the experiment aspect superconductor malformation test also very limited (domesticly almost development, become keeping in check of the domestic ITER of development correlative study), its main difficulty be the pick-up unit in the finite space under low temperature environment install with utmost point low temperature and strong magnetic field circumstance under deformation measurement sensor adaptability; And almost also there is no the good test experience ways and means of precision in superconductor quench magnetic heat distribution rule and effective context of detection.
Realizing in process of the present invention, inventor finds, in prior art, at least have that deformation measurement sensor bad adaptability, measurement data validity are poor, measurement accuracy poor with the defect such as accuracy of detection is low.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose the multi-point test system of a kind of superconductor dynamic surface magnetic field and heat distribution, to realize the advantage that deformation measurement sensor adaptability is good, measurement data validity is good, measurement accuracy is good and accuracy of detection is high.
For achieving the above object, the technical solution used in the present invention is: the multi-point test system of a kind of superconductor dynamic surface magnetic field and heat distribution, comprises the support being made up of horizontally disposed copper back up pad and the copper support bar vertically arranging; In described copper back up pad, bottom-up vibrator, aluminum pallet and the superconductor proving installation of being provided with successively; On described copper support bar, be horizontally disposed with adjustable for height aluminium beam, be suspended on the permanent magnet on described aluminium beam, and for described permanent magnet being fixed on to the permanent magnet set bolt on aluminium beam.
Further, described superconductor proving installation comprises the polystyrene foam container and the vibration-testing sensor that are arranged on aluminum pallet; Inside at described polystyrene foam container is loaded with liquid nitrogen, the superconductor probe gripper that is placed with high-temperature superconductor and is equipped with described high-temperature superconductor and is connected with superconductor seamless surface for low-temperature test assembly in liquid nitrogen; Add and be stamped epoxy resin cover plate at the top of polystyrene foam container.
Further, described superconductor probe gripper is fixedly pasted the bottom at polystyrene foam container with low temperature glue, comprise upper " recessed " type skeleton of being symmetrical arranged up and down and there is recessed cavity with under " recessed " type skeleton, and be arranged on described upper " recessed " type skeleton and under low-temperature test assembly between " recessed " type skeleton.
Further, described upper " recessed " type skeleton with under " recessed " type skeleton, be for making superconductor part exposed to adjust the grid structure of position.
Further, described upper " recessed " type skeleton with under the recess of " recessed " type skeleton be oppositely arranged and there is internal thread, described low-temperature test assembly comprises copper pipe, be encapsulated in low temperature hall probe and temperature sensor in described copper pipe, be placed on down the superconductor in the internal cavities of " recessed " type skeleton and be attached to the lip-deep low temperature foil gauge of described superconductor; With described upper " recessed " type skeleton and under the internal thread of " recessed " type skeleton match, at the outer external thread that is arranged with of described copper pipe.
Further, described low temperature hall probe comprises probe bearing, and the multiple probe points that arrange according to the number of test point; Corresponding with each probe point, be provided with the probe wire surplus and the wire fastener that stretch out copper pipe; Corresponding probe wire surplus, by corresponding wire fastener, is connected on the top board of " recessed " type skeleton away from recess.
Further, described superconductor is the superconducting block of right cylinder or positive hexa-prism.
The superconductor dynamic surface magnetic field of various embodiments of the present invention and the multi-point test system of heat distribution, owing to comprising the support being made up of horizontally disposed copper back up pad and the copper support bar vertically arranging; In copper back up pad, bottom-up vibrator, aluminum pallet and the superconductor proving installation of being provided with successively; On copper support bar, be horizontally disposed with adjustable for height aluminium beam, be suspended on the permanent magnet on aluminium beam, and for described permanent magnet being fixed on to the permanent magnet set bolt on aluminium beam; Can measure the experiment test platform of the mechanical deformation of superconductor under dynamic case, Distribution of Magnetic Field, thermal conductivity law etc., solve the basic key issue at the experimental measurement method of the characterisitic parameters such as extreme environment superconductor electromagnetism and mechanics; Means that can be by experiment, disclose the dependence rule of its physical characteristics parameter of superconductor to utmost point low temperature and magnetic field environment, for the application of superconductor provides effective and reliable master data; Thereby can overcome, deformation measurement sensor bad adaptability in prior art, measurement data validity are poor, the poor defect low with accuracy of detection of measurement accuracy, to realize the advantage that deformation measurement sensor adaptability is good, measurement data validity is good, measurement accuracy is good and accuracy of detection is high.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in write instructions, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the multi-point test system of superconductor dynamic surface magnetic field and heat distribution according to the present invention;
Fig. 2 is the assembly structure schematic diagram of cryogenic probe in the multi-point test system of superconductor dynamic surface magnetic field and heat distribution according to the present invention, superconductor and fixture;
Fig. 2 a is the structural representation of vertical view of cryogenic probe and probe bearing in Fig. 2;
Fig. 2 b and Fig. 2 c are the cross sectional representation of superconductor in Fig. 2.
By reference to the accompanying drawings, in the embodiment of the present invention, Reference numeral is as follows:
The copper support bar of 1-; 2-aluminium beam; 3-permanent magnet; 4-permanent magnet set bolt; 5-epoxy resin cover plate; 6-polystyrene foam container; 7-liquid nitrogen; 8-superconductor probe gripper; 9-high-temperature superconductor; 10-vibration-testing sensor; 11-aluminum pallet; 12-vibrator; 13-wire fastener; 14-probe wire surplus; 15-internal thread; 16-external thread; 17-low temperature Hall (hall) probe and temperature sensor; 18-superconducting block; 19-low temperature foil gauge.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
According to the embodiment of the present invention, provide the multi-point test system of a kind of superconductor dynamic surface magnetic field and heat distribution.As shown in Fig. 1-Fig. 2 c, the present embodiment comprises the support being made up of horizontally disposed copper back up pad and the copper support bar 1 vertically arranging; In copper back up pad, bottom-up vibrator 12, the aluminum pallet 11 and superconductor proving installation of being provided with successively; On copper support bar 1, be horizontally disposed with adjustable for height aluminium beam 2, be suspended on the permanent magnet 3 on aluminium beam 2, and for permanent magnet 3 being fixed on to the permanent magnet set bolt 4 on aluminium beam 2.
In the above-described embodiments, superconductor proving installation comprises the polystyrene foam container 6 and vibration-testing sensor 10 that are arranged on aluminum pallet 11; Be loaded with liquid nitrogen 7(77K in the inside of polystyrene foam container 6), the superconductor probe gripper 8 that is placed with high-temperature superconductor 9 and is equipped with high-temperature superconductor 9 and is connected with superconductor seamless surface for low-temperature test assembly in liquid nitrogen 7; Add and be stamped epoxy resin cover plate 5 at the top of polystyrene foam container 6.
In the above-described embodiments, superconductor probe gripper 8 use low temperature glue are fixedly pasted the bottom at polystyrene foam container 6, comprise upper " recessed " type skeleton of being symmetrical arranged up and down and there is recessed cavity with under " recessed " type skeleton, and be arranged on " recessed " type skeleton and under low-temperature test assembly between " recessed " type skeleton.Wherein, upper " recessed " type skeleton with under " recessed " type skeleton, be for making superconductor part exposed to adjust the grid structure of position.Here, upper " recessed " type skeleton with under the material of " recessed " type skeleton can adopt aluminium or copper.
In the above-described embodiments, upper " recessed " type skeleton with under the recess of " recessed " type skeleton be oppositely arranged and there is internal thread 15, low-temperature test assembly comprises copper pipe (directly for 2mm), be encapsulated in low temperature Hall (hall) probe (Applicable temperature 77K-400K is of a size of diameter 2mm) and temperature sensor (precision 0.1K) in copper pipe, be placed on down the superconductor in the internal cavities of " recessed " type skeleton and be attached to the lip-deep low temperature foil gauge 19 of superconductor; With upper " recessed " type skeleton and under the internal thread 15 of " recessed " type skeleton match, at the outer external thread 16 that is arranged with of copper pipe.Here, superconductor is the superconducting block 18 of right cylinder or positive hexa-prism.
In the above-described embodiments, low temperature hall probe comprises probe bearing, and the multiple probe points that arrange according to the number of test point; Corresponding with each probe point, be provided with the probe wire surplus 14 and wire fastener 13 of stretching out copper pipe, and on the top board away from recess, be provided with chuck at upper " recessed " type skeleton; Corresponding probe wire surplus 14, by corresponding wire fastener 13, is connected to the chuck place of " recessed " type skeleton, and the material of chuck is aluminium or copper.
When concrete operations, in the superconductor probe gripper 8 that superconductor is positioned over, low temperature hall probe and temperature sensor 17(temperature sensor with some measuring magnetic field intensity are placed in one with low temperature hall probe), then the bottom that superconductor probe gripper 8 entirety is attached to polystyrene foam container 6 with low temperature gluing, is fixed together with polystyrene foam container 6; The polystyrene foam container 6 that will test is fixed on the aluminum pallet 11 of vibrator 12, and on aluminum pallet 11, places the Dynamic Signal of vibration-testing sensor 10; Fix after polystyrene foam container 6 and vibrator 12, liquid nitrogen 7 is poured in polystyrene foam container 6, and cover the opening of polystyrene foam container 6 with epoxy resin cover plate 5, on aluminium beam 2, lay permanent magnet 3, with permanent magnet set bolt 4 fixed permanent magnets 3, experimental requirement simultaneously can increase or reduce the height of aluminium beam 2, thereby reaches requirement and the object of experiment.
Must be noted that superconductor is when dynamic, have characteristics different when static, i.e. magnetic heat distribution rule has very large difference, and the magnetic heat on superconductor surface has different features, and for difference measurement, this just seems particularly important.Simultaneously, domestic, foreign technology at present, its structure of the superconductor of producing is all smaller, its diameter is about 30mm, is highly about right cylinder or six prisms of 20mm, for this reason, all very little of the size of the superconductor probe gripper 8 of above-described embodiment and the low temperature hall probe that adopts, and, superconductor probe gripper 8 can be fixed according to the position of the vibration-testing sensor 10 of maximum 25 points of size realization of institute's test sample product, can comparatively comprehensively test superconductor superconductor surface magnetic, heat distribution rule under dynamic case and carry out multi-point sampler.
For the mechanics deform in same pace of superconductor, adopt at superconductor cylinder and paste low temperature foil gauge 19(Applicable temperature 4-400K), the mechanical deformation characteristic of test superconductor, thus realize the synchronism detection of mechanical deformation and magnetic, hot characteristic quantity.
Wherein, for superconductor surface is contacted with low temperature hall probe and the seamless of temperature sensor 17, above-described embodiment has designed superconductor probe gripper 8; The skeleton of wherein fixing superconductor is reticulate texture, only need play the effect of fixing superconductor and the seamless link of probe bearing, and convenient its position in skeleton the inside of adjusting.Probe bearing adopts alumina based material, its diameter is 2mm, structure is honeycomb, low temperature hall probe and temperature sensor 17 can be inserted in the hole, and contacts with superconductor cross section is seamless, again by upper " recessed " type skeleton, fix low temperature hall probe and temperature sensor 17 wire in addition, in order to avoid produce and swing in vibration, and affect experiment test, and allow wire can not be subject to tension force, wire is produced and destroyed; Thereby whole superconductor probe gripper 8 can make the low temperature hall probe of superconductor and test and temperature sensor 17 in one, guarantees accuracy and the precision of dynamic experimental test.
The superconductor dynamic surface magnetic field of above-described embodiment and the multi-point test system of heat distribution, initiative, be conducive to set up a set of reliable, accurately, the mechanical deformation of the high measurement superconductor of automaticity under dynamic case, Distribution of Magnetic Field, the experiment test platform of thermal conductivity law etc., solve at extreme environment, the basic key issue of the experimental measurement method of the characterisitic parameters such as superconductor electromagnetism and mechanics, means that can be by experiment, disclose the dependence rule of its physical characteristics parameter of superconductor to utmost point low temperature and magnetic field environment, for the application of superconductor provides effective, master data reliably, for further development and application is laid a good foundation, the multi-point test system of this superconductor dynamic surface magnetic field and heat distribution, is applicable to extreme environment, superconductor under dynamic case, the experimental measurement system of the characterisitic parameters such as electromagnetism and mechanics, can realize the association test between superconductor magnetic field, temperature field and the stress field not applying under impressed current situation, fill up effective detection of superconduction quench magnetic heat distribution rule.
In sum, the superconductor dynamic surface magnetic field of various embodiments of the present invention and the multi-point test system of heat distribution, owing to comprising the support being made up of horizontally disposed copper back up pad and the copper support bar vertically arranging; In copper back up pad, bottom-up vibrator, aluminum pallet and the superconductor proving installation of being provided with successively; On copper support bar, be horizontally disposed with adjustable for height aluminium beam, be suspended on the permanent magnet on aluminium beam, and for described permanent magnet being fixed on to the permanent magnet set bolt on aluminium beam; Can measure the experiment test platform of the mechanical deformation of superconductor under dynamic case, Distribution of Magnetic Field, thermal conductivity law etc., solve the basic key issue at the experimental measurement method of the characterisitic parameters such as extreme environment superconductor electromagnetism and mechanics; Means that can be by experiment, disclose the dependence rule of its physical characteristics parameter of superconductor to utmost point low temperature and magnetic field environment, for the application of superconductor provides effective and reliable master data; Thereby can overcome, deformation measurement sensor bad adaptability in prior art, measurement data validity are poor, the poor defect low with accuracy of detection of measurement accuracy, to realize the advantage that deformation measurement sensor adaptability is good, measurement data validity is good, measurement accuracy is good and accuracy of detection is high.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a multi-point test system for superconductor dynamic surface magnetic field and heat distribution, is characterized in that, comprises the support being made up of horizontally disposed copper back up pad and the copper support bar vertically arranging; In described copper back up pad, bottom-up vibrator, aluminum pallet and the superconductor proving installation of being provided with successively; On described copper support bar, be horizontally disposed with adjustable for height aluminium beam, be suspended on the permanent magnet on described aluminium beam, and for described permanent magnet being fixed on to the permanent magnet set bolt on aluminium beam;
Described superconductor proving installation comprises the polystyrene foam container and the vibration-testing sensor that are arranged on aluminum pallet; Inside at described polystyrene foam container is loaded with liquid nitrogen, the superconductor probe gripper that is placed with high-temperature superconductor and is equipped with described high-temperature superconductor and is connected with superconductor seamless surface for low-temperature test assembly in liquid nitrogen; Add and be stamped epoxy resin cover plate at the top of polystyrene foam container;
Described superconductor probe gripper is fixedly pasted the bottom at polystyrene foam container with low temperature glue, comprise upper " recessed " type skeleton of being symmetrical arranged up and down and there is recessed cavity with under " recessed " type skeleton, and be arranged on described upper " recessed " type skeleton and under low-temperature test assembly between " recessed " type skeleton;
Described upper " recessed " type skeleton with under " recessed " type skeleton, be for making superconductor part exposed to adjust the grid structure of position;
Described upper " recessed " type skeleton with under the recess of " recessed " type skeleton be oppositely arranged and there is internal thread, described low-temperature test assembly comprises copper pipe, be encapsulated in low temperature hall probe and temperature sensor in described copper pipe, be placed on down the superconductor in the internal cavities of " recessed " type skeleton and be attached to the lip-deep low temperature foil gauge of described superconductor; With described upper " recessed " type skeleton and under the internal thread of " recessed " type skeleton match, at the outer external thread that is arranged with of described copper pipe;
Described low temperature hall probe comprises probe bearing, and the multiple probe points that arrange according to the number of test point; Corresponding with each probe point, be provided with the probe wire surplus and the wire fastener that stretch out copper pipe; Corresponding probe wire surplus, by corresponding wire fastener, is connected on the top board of " recessed " type skeleton away from recess;
Described superconductor is the superconducting block of right cylinder or positive hexa-prism.
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| CN201110289973.8A CN102359905B (en) | 2011-09-28 | 2011-09-28 | Multi-point testing system for dynamic surface magnetic field and thermal distribution of superconductor |
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| CN201110289973.8A CN102359905B (en) | 2011-09-28 | 2011-09-28 | Multi-point testing system for dynamic surface magnetic field and thermal distribution of superconductor |
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| CN102359905B true CN102359905B (en) | 2014-06-18 |
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| CN102706378B (en) * | 2012-04-28 | 2015-05-27 | 深圳光启高等理工研究院 | Metamaterial testing fixture device |
| CN105301461A (en) * | 2015-11-27 | 2016-02-03 | 云南电网有限责任公司电力科学研究院 | Test device for insulation performance of wrapped superconductor and test method thereof |
| CN107505493B (en) * | 2016-11-04 | 2023-09-26 | 洛阳理工学院 | Tension-controllable superconducting strip critical current measuring device |
| CN107144720B (en) * | 2017-05-11 | 2023-06-13 | 西南交通大学 | Device and method for testing critical current of superconducting strip under cyclic load |
| CN111175677A (en) * | 2020-01-13 | 2020-05-19 | 合肥工业大学 | Dynamic superconducting magnetic force tester and testing method for simulating vibration working condition |
| CN113495238A (en) * | 2020-04-07 | 2021-10-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Dynamic superconducting magnet thermal load test system with background magnetic field |
| CN113495237A (en) * | 2020-04-07 | 2021-10-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Dynamic superconducting magnet thermal load testing method with background magnetic field |
| CN113495236A (en) * | 2020-04-07 | 2021-10-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Superconducting magnet vibration test system with background magnetic field |
| CN112556870A (en) * | 2020-12-02 | 2021-03-26 | 云南电网有限责任公司电力科学研究院 | Method and system for measuring dynamic temperature of superconducting strip |
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| CN2173981Y (en) * | 1993-11-12 | 1994-08-10 | 清华大学 | High critical temp. superconductor magnetic suspension train demonstration apparatus |
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