CN100570380C - A kind of isolated plant of measuring superconducting line joint resistance - Google Patents
A kind of isolated plant of measuring superconducting line joint resistance Download PDFInfo
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- CN100570380C CN100570380C CNB2008101035318A CN200810103531A CN100570380C CN 100570380 C CN100570380 C CN 100570380C CN B2008101035318 A CNB2008101035318 A CN B2008101035318A CN 200810103531 A CN200810103531 A CN 200810103531A CN 100570380 C CN100570380 C CN 100570380C
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Abstract
A kind of isolated plant of measuring superconducting line joint resistance comprises critical pieces such as cooled cryostat unit, room temperature pipe unit, background magnet unit, excitation magnet unit, hitch unit, decay magnetic-field measurement unit.Only need when the advantage of this isolated plant is to change tested superconducting line joint sample loop the room temperature pipe is shifted out cooled cryostat by guide rail, reduced the volatile quantity of liquid helium in the experimentation; The background magnet is positioned at the Hall element side of measuring superconducting line joint sample loop decay magnetic field, compares with being placed on its below, has reduced background magnetic field is measured the decay magnetic field of superconducting line joint sample loop generation to Hall element influence; Adopt the room temperature Manifold technology, Hall element is placed in the room temperature pipe, promptly measure the decay magnetic field of superconducting line joint sample loop, reduce installation cost, and improved the measurement reliability with the normal temperature Hall element.
Description
Technical field
The invention belongs to the superconductor technology field, a kind of isolated plant of measuring superconducting line joint resistance.
Background technology
The resistance that is in the superconducting line of superconducting state approaches zero, can flow through bigger electric current than the normal temperature conductor, and its application is increasingly extensive.But in the manufacture process of big-and-middle-sized superconducting coil, the superconducting line consumption is a lot, is subjected to the superconducting line length that the manufacturer supplies or the requirement and the restriction of superconducting coil technique for coiling, is difficult to finish with a complete superconducting line coiling of coil.Therefore, all there is the superconducting joint of certain form in big-and-middle-sized superconducting coil in its structure, and at this moment, the current capacity of the superconducting line in the superconducting coil depends on the resistance value size at superconducting joint place to a great extent.Because superconducting joint resistance requires the order of magnitude that reaches very little, so it accurately measures also very difficult.By the accurate measurement of superconducting line joint resistance, can differentiate the quality of joint technology, give security for improving the superconducting line performance.
On the other hand, because the superconducting joint resistance measurement is carried out at low temperatures, and Measuring Time is very long, cooling medium liquid helium, the liquid nitrogen of Xiao Haoing is a lot of during this time, in order to make full use of cooling medium, the resistance of the several superconducting joints of continuous coverage often, to save the cooling medium consumption, it is easily convenient as far as possible that this requires in superconducting joint sample replacing process.In addition, need the background magnetic field of certain intensity in the superconducting joint resistance measurement process, if background magnet riding position is improper or shield effectiveness is bad, will influence the decay magnetic field that the superconducting joint sample is produced, thereby influence measuring accuracy.
Summary of the invention
The objective of the invention is at the requirement in the superconducting joint line resistance measuring process, it is easy to realize changing sample, the influence of saving the cooling medium consumption and reducing background magnetic field, a kind of isolated plant of measuring superconducting line joint resistance is provided, it is characterized in that, measure the isolated plant of superconducting line joint resistance and mainly form by cooled cryostat unit, room temperature pipe unit, background magnet unit, excitation magnet unit, hitch unit, decay magnetic-field measurement unit; The hitch unit is affixed with the cooled cryostat flange 2 of cooled cryostat unit by its three connecting links 28, is installed in the stainless steel cooled cryostat 1; Excitation magnet unit and background magnet unit are installed in the right and left on the base plate 27 of hitch unit respectively; The room temperature pipe flange 8 of room temperature pipe unit is contained on the cooled cryostat flange 2 of cooled cryostat unit, and pipe 6 and room temperature pipe outer tube 7 are in stainless steel cooled cryostat 1 in the room temperature pipe of room temperature pipe unit; Decay magnetic-field measurement unit is installed in the interior pipe 6 of room temperature of room temperature pipe unit.
In the described cooled cryostat unit, cooled cryostat flange 2 is by the bottleneck that is bolted to stainless steel cooled cryostat 1, the cooling medium liquid helium is housed in the stainless steel cooled cryostat 1, liquid level meter seat 3, woven hose base 4, background magnet and field coil current feed base 5 are installed above the cooled cryostat flange 2, connect with low temperature is gluing between they and the cooled cryostat flange 2.
The room temperature pipe unit by manage 6 in the room temperature pipe, room temperature pipe outer tube 7, room temperature pipe flange 8, sample ring stand 9, test bracket 10, suspension rod 11 and soft iron shielding box cover 12 form; Pipe 6 and room temperature pipe outer tube 7 coaxial welding are in the bottom surface of room temperature pipe flange 8 in the room temperature pipe, and the outer wall of the interior pipe 6 of room temperature pipe is surrounded by metallized film 13 in the intermediate course; Pipe 6 passes room temperature pipe flange 8 in the room temperature pipe, the upper end of pipe 6 and Hall test base 40 welding in the room temperature pipe, the top welded and installed of room temperature pipe flange 8 has two hangers 16 of heater strip lead frames 14, vacuum-pumping tube 15 and lifting usefulness, and the interlayer in vacuum-pumping tube 15 and the room temperature pipe between pipe 6 and the room temperature pipe outer tube 7 is connected; The upper end of suspension rod 11 is fixed in the bottom surface of room temperature pipe flange 8, and the central vertical of the soft iron shielding box cover 12 of suspension rod 11 bottoms and background magnet is affixed, and an aperture is arranged near the center of soft iron shielding box cover 12, reaches in the background magnet for superconducting line joint sample 23; Test bracket 10 two ends are fixed in the tube wall and suspension rod 11 bottoms of room temperature pipe outer tube 7 respectively; The gathering sill at test bracket 10 middle parts and the guide rail 29 of hitch unit are slidingly connected; Sample ring stand 9 is fixed on the bottom of room temperature pipe outer tube 7, and superconducting line joint sample loop 17 is around being placed on the sample ring stand 9 and fixing on test bracket 10; The heater strip of sample is on superconducting line joint sample loop 17, and heater strip lead-in wire 18 is placed along suspension rod 11 and is connected to heater strip lead frames 14; Suspension rod 11 and room temperature pipe flange 8 affixed, suspension rod 11 and soft iron shielding box cover 12 affixed, test bracket 10 two ends are affixed with the tube wall and the suspension rod 11 of room temperature pipe outer tube 7 respectively, and sample ring stand 9 and room temperature pipe outer tube 7 are fixing all to adopt the low temperature glue bond affixed.The material of pipe 6, room temperature pipe outer tube 7 and room temperature pipe flange 8 is a stainless steel in the room temperature pipe.
The background magnet unit is made up of background magnet coil 19, background magnet coil skeleton 20 and soft iron shielding box 21; Background magnet coil 19 is wound on and constitutes the background magnet on the background magnet coil skeleton 20, provide 23 tests of superconducting line joint sample required background magnetic field intensity, produce the precision in magnetic fields in order to make it not influence measurement superconducting line joint sample loop 17, the background magnet is installed in the soft iron shielding box 21, soft iron shielding box cover 12 covers on soft iron shielding box 21, and background magnet coil lead-in wire 22 is connected to background magnet and field coil current feed base 5 along connecting link 28; Superconducting line joint sample 23 places the center of background magnet coil 19 from the aperture on the soft iron shielding box cover 12 through test bracket 10 and suspension rod 11.
The excitation magnet unit is made up of field coil 24 and field coil skeleton 25, field coil 24 is wound on the field coil skeleton 25, field coil lead-in wire 26 is connected to background magnet and field coil current feed base 5, and the input pulse electric current is used for providing magnetic field excitation for tested superconducting line joint sample loop 17.
The hitch unit is made up of base plate 27, guide rail 29, three connecting links 28 and three radiation proof boards 30, and base plate 27 is epoxy resin circular slabs, and excitation magnet unit and background magnet unit are fixed on the base plate 27 with the epoxy screw; Guide rail 29 usefulness low temperature glue upper end and cooled cryostat flange 2 are affixed, and lower end and base plate 27 are affixed; Three connecting links 28 adopt screw thread to add the low temperature glue bond and fix, and the lower end is connected with base plate 27, and the upper end is connected with cooled cryostat flange 2; Guide rail 29 is epoxy resin convex tracks, and when changing superconducting line joint sample loop 17, the room temperature pipe unit slides along guide rail 29, guarantees that superconducting line joint sample 23 accurately places the center of background magnet coil 19; Three radiation proof boards 30 are to be made by copper plate, equidistantly be fixed on the top of the connecting link 28 of hitch, the manhole appendix of room temperature pipe unit and the through wires hole of field coil lead-in wire 26, background magnet coil lead-in wire 22 and heater strip lead-in wire 18 are arranged above the radiation proof board 30 with low temperature glue.
Decay magnetic-field measurement unit is made of normal temperature Hall element 31, temperature detecting resistance 32 and peripheral circuit thereof; Peripheral circuit comprises first stabilized voltage supply 34, filtering circuit 35, second stabilized voltage supply 36,1mA current source 37, amplification filtering circuit 38; The 8V DC voltage that first source of stable pressure 34 is supplied with the outside converts the 5V DC voltage to, gives the normal temperature Hall element 31 power supplies, and the signal that Hall element 31 produces is output magnetic-field measurement signal after filtering circuit 35 is handled; Another part is in the peripheral circuit, the 8V DC voltage that second source of stable pressure 36 is supplied with the outside converts the 5V DC voltage to, give 1mA current source 37 and 38 power supplies of amplification filtering circuit, the output current of 1mA current source 37 is at the output temperature measuring-signal after amplification filtering circuit 38 amplification filtering of the pressure drop on the temperature detecting resistance 32; Magnetic-field measurement signal and temperature measurement signal are exported from Hall test base 40 through output signal line 39; Normal temperature Hall element 31, temperature detecting resistance 32 and peripheral circuit thereof all are installed on the metering circuit plate 33, and metering circuit plate 33 places the bottom of pipe 6 in the room temperature pipe, and wherein normal temperature Hall element 31 and superconducting line joint sample loop 17 place in the same surface level; The 8V power supply is outside at this device, powers to peripheral circuit through Hall test base 40.
The material of described cooled cryostat flange 2, test bracket 10, base plate 27 and guide rail 29 is an epoxy resin board, and the material of suspension rod 11 and connecting link 28 is the epoxy resin rod, and the material of background magnet coil skeleton 20 and field coil skeleton 25 is an epoxy resin.Described low temperature glue is epoxide-resin glue.
Beneficial effect of the present invention: only need the room temperature pipe unit is shifted out the cooled cryostat unit by guide rail, the superconducting line joint sample loop can be changed easily, has reduced the volatile quantity of liquid helium in the test process; The background magnet is positioned at the side of normal temperature Hall element, compares with being placed on its below, has reduced background magnetic field is measured superconducting line joint sample loop magnetic field to Hall element influence; Adopt the room temperature Manifold technology, Hall element is placed in the room temperature pipe, the decay magnetic field with normal temperature Hall element measurement superconducting line joint sample loop reduces installation cost, and has improved the measurement reliability.
Description of drawings
Figure 1A is that the general structure of embodiment is faced diagrammatic cross-section;
Figure 1B is the vertical view of embodiment
Fig. 2 is a superconducting line joint sample loop decay magnetic-field measurement circuit block diagram among the embodiment
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and concrete embodiment are described once.Figure 1A faces diagrammatic cross-section for a kind of general structure of measuring the isolated plant embodiment of superconducting line joint resistance, as shown in the figure, device mainly is made of cooled cryostat unit, room temperature pipe unit, background magnet unit, excitation magnet unit, hitch unit and decay magnetic-field measurement unit.
Installing each unit assembles as follows:
(1) be separately fixed at background magnet unit and excitation magnet unit on the base plate 27 of hitch unit with the epoxy screw;
(2) whole hitch unit is connected with cooled cryostat flange 2, integral body is put into stainless steel cooled cryostat 1 afterwards, and is with bolt that cooled cryostat flange 2 and stainless steel cooled cryostat 1 is suitable for reading fixing;
(3) will the decay metering circuit plate 33 of magnetic-field measurement unit is put into room temperature pipe pipe 6 bottoms of room temperature pipe unit, and normal temperature Hall element 31 places the center of sample ring stand 9;
(4) superconducting line joint sample loop 17 is enclosed within on the sample ring stand 9, and it is fixing on test bracket 10, superconducting line joint sample 23 stretches out soft iron shielding box cover 12 through the lower end of test bracket 10 and suspension rod 11 by aperture on the soft iron shielding box cover 12, and maintenance places it in the superconducting line length of the center of background magnet coil 19;
(5) track 29 of room temperature pipe unit along the hitch unit slipped in the stainless steel cooled cryostat 1, and fixing with cooled cryostat flange 2.
Figure 1B is the vertical view of embodiment.During the work of this device shown in the figure and each connector of peripherals.Insert the liquid level meter of measuring the liquid helium liquid level from liquid level meter seat 3, inserting the liquid helium woven hose from woven hose base 4 carries liquid helium for stainless steel cooled cryostat 1, background magnet power supply and excitation magnet power supply are given background magnet coil 19 and field coil 24 power supplies from background magnet and field coil current feed base 5, heater strip lead frames 14 is connected to the heater strip power supply, vacuum-pumping tube 15 is received vacuum pump and is vacuumized to the interlayer of room temperature pipe, gives the metering circuit plate 33 power supplies from the decay magnetic-field measurement signal and the temperature measurement signal of Hall test base 40 output superconducting line joint sample loops 17 to peripheral metering circuit and from the 8V power supply of periphery.
In this device, the room temperature pipe unit separates with the cooled cryostat flange 2 of cooled cryostat unit, the superconducting line joint specimen is taken out at every turn or when putting into cooled cryostat, is only needed room temperature pipe unit and sample ring stand 9 fixed thereon are taken out, and needn't open cooled cryostat flange 2.Room temperature pipe unit and sample ring stand 9 take out to be changed when putting into the resistance of stainless steel cooled cryostat 1 measurement superconducting line joint sample 23 again behind the superconducting line joint sample loop 17, is that the guide rail 29 in the cooled cryostat unit moves, and has guaranteed the accuracy of position.The background magnet unit is placed on the side of superconducting line joint sample loop 17, rather than the below, has reduced the influence of the magnetic field of background magnet to the decay magnetic-field measurement of superconducting line joint sample loop 17.The metering circuit plate 33 that is used to measure the decay magnetic field that superconducting line joint sample loop 17 produces is to be made of normal temperature Hall element 31, temperature detecting resistance 32 and peripheral circuit thereof, is transferred to peripheral metering circuit from the magnetic-field measurement signal of metering circuit plate 33 outputs and temperature measurement signal and obtains measurement data.
Claims (22)
1. an isolated plant of measuring superconducting line joint resistance is characterized in that, isolated plant mainly is made up of cooled cryostat unit, room temperature pipe unit, background magnet unit, excitation magnet unit, hitch unit, decay magnetic-field measurement unit; The hitch unit is affixed with the cooled cryostat flange (2) of cooled cryostat unit by three connecting links (28), is installed in the stainless steel cooled cryostat (1); Excitation magnet unit and background magnet unit are installed in the base plate (27) of hitch unit respectively and go up the right and left; The room temperature pipe flange (8) of room temperature pipe unit is contained on the cooled cryostat flange (2) of cooled cryostat unit, and pipe (6) and room temperature pipe outer tube (7) are in stainless steel cooled cryostat (1) in the room temperature pipe of room temperature pipe unit; Decay magnetic-field measurement unit is installed in the interior pipe of room temperature pipe (6) of room temperature pipe unit; Test bracket (10) two ends are fixed in the tube wall and suspension rod (11) bottom of room temperature pipe outer tube (7) respectively; The gathering sill at test bracket (10) middle part and the guide rail (29) of hitch unit are slidingly connected, guide rail (29) is the convex track, when changing superconducting line joint sample loop (17), the room temperature pipe unit slips in the stainless steel cooled cryostat (1) along guide rail (29), and fixing with cooled cryostat flange (2).
2. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1, it is characterized in that, in the described cooled cryostat unit, cooled cryostat flange (2) is by the bottleneck that is bolted to stainless steel cooled cryostat (1), the top affixed liquid level meter seat (3) of cooled cryostat flange (2), woven hose base (4), background magnet and field coil current feed base (5);
Connect with low temperature is gluing between liquid level meter seat (3), woven hose base (4), background magnet and field coil current feed base (5) and the cooled cryostat flange (2).
3. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1, it is characterized in that described room temperature pipe unit is made up of pipe (6), room temperature pipe outer tube (7), room temperature pipe flange (8), sample ring stand (9), test bracket (10), suspension rod (11) and soft iron shielding box cover (12) in the room temperature pipe; Pipe (6) and room temperature pipe outer tube (7) coaxial welding are in the bottom surface of room temperature pipe flange (8) in the room temperature pipe, and the outer wall of managing (6) in the intermediate course in the room temperature pipe is surrounded by metallized film (13); Pipe (6) passes room temperature pipe flange (8) in the room temperature pipe, the upper end of pipe (6) and Hall test base (40) welding in the room temperature pipe, the top welded and installed of room temperature pipe flange (8) has heater strip lead frames (14), vacuum-pumping tube (15) and two hangers (16), and the interlayer in vacuum-pumping tube (15) and the room temperature pipe between pipe (6) and the room temperature pipe outer tube (7) is connected; The upper end of suspension rod (11) is fixed in the bottom surface of room temperature pipe flange (8), and the central vertical of the soft iron shielding box cover (12) of suspension rod (11) bottom and background magnet is affixed, near the center of soft iron shielding box cover (12) aperture is arranged; Sample ring stand (9) is fixed on the bottom of room temperature pipe outer tube (7), and go up and go up fixing at test bracket (10) by sample ring stand (9) around being placed on for superconducting line joint sample loop (17); The heater strip of sample is on superconducting line joint sample loop (17), and heater strip lead-in wire (18) is placed along suspension rod (11), is connected to heater strip lead frames (14);
Suspension rod (11) and room temperature pipe flange (8) affixed, suspension rod (11) and soft iron shielding box cover (12) affixed, test bracket (10) two ends are affixed with the tube wall of room temperature pipe outer tube (7) and suspension rod (11) respectively, and sample ring stand (9) and room temperature pipe outer tube (7) be fixing to adopt all that low temperature is gluing to be connect.
4. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1 is characterized in that, described background magnet unit is made up of background magnet coil (19), background magnet coil skeleton (20) and soft iron shielding box (21); Background magnet coil (19) is wound on background magnet coil skeleton (20) and goes up formation background magnet, and the background magnet is installed in the soft iron shielding box (21), and soft iron shielding box cover (12) covers on soft iron shielding box (21); Background magnet coil lead-in wire (22) is connected to background magnet and field coil current feed base (5) along connecting link (28); Superconducting line joint sample (23) places the center of background magnet coil (19) from the aperture on the soft iron shielding box cover (12) through test bracket (10) and suspension rod (11).
5. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1, it is characterized in that, described excitation magnet unit is made up of field coil (24) and field coil skeleton (25), field coil (24) is wound on the field coil skeleton (25), and field coil lead-in wire (26) is connected to background magnet and field coil current feed base (5).
6. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1 is characterized in that, described hitch unit is made up of base plate (27), guide rail (29), three connecting links (28) and three radiation proof boards (30); Excitation magnet unit and background magnet unit are fixed on the base plate (27) with the epoxy screw; Guide rail (29) is affixed with low temperature glue upper end and cooled cryostat flange (2), and lower end and base plate (27) are affixed; Three connecting links (28) adopt screw thread to add the low temperature glue bond and fix, and the lower end is connected with base plate (27), and the upper end is connected with cooled cryostat flange (2); Three radiation proof boards (30) equidistantly are fixed on the top of the connecting link (28) of hitch with low temperature glue.
7. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1 is characterized in that, described decay magnetic-field measurement unit is made of normal temperature Hall element (31), temperature detecting resistance (32) and peripheral circuit thereof; Peripheral circuit comprises first stabilized voltage supply (34), filtering circuit (35), second stabilized voltage supply (36), 1mA current source (37), amplification filtering circuit (38); The 8V DC voltage that first source of stable pressure (34) is supplied with outside 8V power supply converts the 5V DC voltage to, gives normal temperature Hall element (31) power supply, and the signal that normal temperature Hall element (31) produces is output magnetic-field measurement signal after filtering circuit (35) is handled; The 8V DC voltage that second source of stable pressure (36) is supplied with outside 8V power supply converts the 5V DC voltage to, give the power supply of 1mA current source (37) and amplification filtering circuit (38), the output current of 1mA current source (37) is at the output temperature measuring-signal after amplification filtering circuit (38) amplification filtering of the voltage drop on the temperature detecting resistance (32); Magnetic-field measurement signal and temperature measurement signal are exported from Hall test base (40) through output signal line (39).
8. according to claim 1 or 7 described a kind of isolated plants of measuring superconducting line joint resistance, it is characterized in that, described decay magnetic-field measurement unit, its normal temperature Hall element (31), temperature detecting resistance (32) and peripheral circuit thereof all are installed on the metering circuit plate (33), metering circuit plate (33) is placed on the bottom of pipe (6) in the room temperature pipe, and wherein normal temperature Hall element (31) and superconducting line joint sample loop (17) place in the same surface level; The 8V power supply is outside at this device, powers to peripheral circuit through Hall test base (40).
9. according to claim 1 or 6 described a kind of isolated plants of measuring superconducting line joint resistance, it is characterized in that the material of described guide rail (29) is an epoxy resin board.
10. a kind of isolated plant of measuring superconducting line joint resistance according to claim 6, it is characterized in that the manhole appendix of room temperature pipe unit and the through wires hole of field coil lead-in wire (26), background magnet coil lead-in wire (22) and heater strip lead-in wire (18) are arranged above the described radiation proof board (30).
11. a kind of isolated plant of measuring superconducting line joint resistance according to claim 1 and 2 is characterized in that the material of described cooled cryostat flange (2) is an epoxy resin board.
12., it is characterized in that the material of described test bracket (10) is an epoxy resin board according to claim 1 or 3 described a kind of isolated plants of measuring superconducting line joint resistance.
13. a kind of isolated plant of measuring superconducting line joint resistance according to claim 6 is characterized in that the material of described base plate (27) is an epoxy resin board.
14., it is characterized in that the material of described suspension rod (11) is the epoxy resin rod according to claim 1 or 3 described a kind of isolated plants of measuring superconducting line joint resistance.
15., it is characterized in that the material of described connecting link (28) is the epoxy resin rod according to claim 1 or 6 described a kind of isolated plants of measuring superconducting line joint resistance.
16. a kind of isolated plant of measuring superconducting line joint resistance according to claim 2 is characterized in that described low temperature glue is epoxide-resin glue.
17. a kind of isolated plant of measuring superconducting line joint resistance according to claim 3 is characterized in that described low temperature glue is epoxide-resin glue.
18. a kind of isolated plant of measuring superconducting line joint resistance according to claim 6 is characterized in that described low temperature glue is epoxide-resin glue.
19., it is characterized in that the material of pipe (6), room temperature pipe outer tube (7) and room temperature pipe flange (8) is a stainless steel in the described room temperature pipe according to claim 1 or 3 described a kind of isolated plants of measuring superconducting line joint resistance.
20., it is characterized in that the material of described radiation proof board (30) is a copper plate according to claim 6 or 10 described a kind of isolated plants of measuring superconducting line joint resistance.
21. a kind of isolated plant of measuring superconducting line joint resistance according to claim 4 is characterized in that the material of described background magnet coil skeleton (20) is an epoxy resin.
22. a kind of isolated plant of measuring superconducting line joint resistance according to claim 5 is characterized in that the material of described field coil skeleton (25) is an epoxy resin.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008101035318A CN100570380C (en) | 2008-04-08 | 2008-04-08 | A kind of isolated plant of measuring superconducting line joint resistance |
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| CNB2008101035318A CN100570380C (en) | 2008-04-08 | 2008-04-08 | A kind of isolated plant of measuring superconducting line joint resistance |
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| CN101251558A CN101251558A (en) | 2008-08-27 |
| CN100570380C true CN100570380C (en) | 2009-12-16 |
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| CNB2008101035318A Expired - Fee Related CN100570380C (en) | 2008-04-08 | 2008-04-08 | A kind of isolated plant of measuring superconducting line joint resistance |
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| CN101839943B (en) * | 2010-05-19 | 2012-12-12 | 中国科学院电工研究所 | Resistance measurement device of conduction cooling type superconduction adapter |
| CN102243273B (en) * | 2011-04-13 | 2013-09-18 | 中国科学院电工研究所 | Interpolation type device for measuring resistance of superconducting joint |
| CN103336179B (en) * | 2013-06-21 | 2016-12-28 | 中国科学院合肥物质科学研究院 | The low-temperature resistance of CICC superconducting joint measures making and the measuring method of system |
| CN104698409B (en) * | 2015-02-04 | 2017-11-10 | 江苏多维科技有限公司 | A kind of single-chip has the high-intensity magnetic field X-axis linear magnetoresistance sensor of alignment coil/replacement coil |
| CN108051646B (en) * | 2017-11-08 | 2020-08-14 | 中国计量科学研究院 | Non-liquid helium quantum Hall resistance transfer device |
| CN108107385B (en) * | 2017-12-22 | 2020-07-24 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-temperature superconducting magnet performance detection system and detection method |
| CN108680791A (en) * | 2018-05-15 | 2018-10-19 | 吴振永 | A kind of 0 resistance of superconducting cable or negative value resistance value use test method |
| CN111681848B (en) * | 2020-06-11 | 2022-03-08 | 中国科学院电工研究所 | Iron-based superconducting coil, preparation method thereof and method for measuring resistance of iron-based superconducting joint |
| CN111983533B (en) * | 2020-08-02 | 2023-03-14 | 南京大学 | Superconducting testing device applied to various low-temperature platforms |
| CN113884062A (en) * | 2021-09-24 | 2022-01-04 | 中国科学院电工研究所 | Large-temperature-difference temperature keeping device for liquid helium at temperature |
| CN116027112B (en) * | 2023-03-30 | 2023-07-04 | 中国科学院合肥物质科学研究院 | Superconducting joint back field-free testing device and testing method thereof |
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