CN103176145B - Block high-temperature superconductor Trapped field measurement mechanism and method - Google Patents
Block high-temperature superconductor Trapped field measurement mechanism and method Download PDFInfo
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- CN103176145B CN103176145B CN201110430384.7A CN201110430384A CN103176145B CN 103176145 B CN103176145 B CN 103176145B CN 201110430384 A CN201110430384 A CN 201110430384A CN 103176145 B CN103176145 B CN 103176145B
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Abstract
A kind of block high-temperature superconductor Trapped field measurement mechanism, comprises frame, vertical movement mechanism, two-dimensional level travel mechanism, drives and data acquisition system (DAS), cryogenic sample container and Hall element; Vertical movement mechanism is fixed in frame, and Hall element is fixed in vertical movement mechanism; Two-dimensional level travel mechanism is fixed in frame, and is positioned at the below of vertical movement mechanism, and cryogenic sample container is fixed in two-dimensional level travel mechanism; Vertical movement mechanism and two-dimensional level travel mechanism are connected with driving and data acquisition system (DAS) respectively.And application apparatus measures the method for high-temperature superconductor Trapped field, method is fixed in vertical movement mechanism by Hall element, by driving the distance between vertical movement mechanism determination Hall element and superconducting sample; Control two stepper motors, make sample relatively and Hall element do tangential movement; Gather the coordinate figure of horizontal direction and the measurement data of Hall element; Trapped Field data and the Distribution of Magnetic Field figure of superconducting sample can be obtained with the data collected mapping.
Description
Technical field
The present invention relates to the Simple measurement device of a kind of block high-temperature superconductor magnetic suspension force and Trapped field.
Background technology
Perfect diamagnetism and zero resistance effect are the principal characters of superconductor.When a superconductor is in external magnetic field, due to the effect of diamagnetism and flux pinning effect, will induce bucking current in superconductor inside, again caused by zero resistance effect, bucking current is decayed hardly in time.The magnetic field that the bucking current continuing flowing in superconducting sample produces and external magnetic field interact, thus produce super-conductive magnetic suspension phenomenon.Super-conductive magnetic suspension technology based on super-conductive magnetic suspension phenomenon has potential using value at numerous areas such as the energy (flywheel energy storage), traffic (magnetic floats car), mechanical industries (frictionless bearing).
Trapped field is the important parameter that superconductor is applied on magnetic levitation technology.Not only can judge superconduction block material whether single domain, also can calculate its magnetic buoyancy performance, even simply can infer the degree of the inherent vice of superconduction block material.
Magnetic buoyancy and Trapped field are the important parameters characterizing block Some Characteristics of Superconducting Material.Although the latter more can reflect the intrinsic property of material all sidedly, because test condition requires complicated, somewhat expensive and can not as material ground conventional sense means.
Summary of the invention
The object of this invention is to provide one Trapped field measurement mechanism simply and easily, for carrying out scanning survey when not destroying sample to bulk single domain and Trapped Field characteristic, thus the quality of bulk being differentiated.
For achieving the above object, the present invention includes following technical scheme:
A kind of block high-temperature superconductor Trapped field measurement mechanism, it comprises frame 1, vertical movement mechanism 2, two-dimensional level travel mechanism 3, drives and data acquisition system (DAS) 4, cryogenic sample container 5, magnetizes with magnet 6 and Hall element 7; Vertical movement mechanism 2 is fixed in frame 1, magnetizes and is fixed in this vertical movement mechanism 2 with magnet 6 or Hall element 7; Two-dimensional level travel mechanism 3 is fixed in frame 1, and is positioned at the below of vertical movement mechanism 2, and cryogenic sample container 5 is fixed in this two-dimensional level travel mechanism 3; Vertical movement mechanism 2 and two-dimensional level travel mechanism 3 are connected with driving and data acquisition system (DAS) 4 respectively.
Device as above, wherein, this vertical movement mechanism 2 is made up of stepper motor 21, precision ball screw 22 and the guide pillar 23 with slide-and-guide groove; This precision ball screw 22 one end connects stepper motor 21, and the other end connects this and magnetizes with magnet 6 or Hall element 7.
Device as above, wherein, this two-dimensional level travel mechanism 3 comprises a sample holder; This sample holder is made up of first guide pillar 36 and the second guide pillar 37 with slide-and-guide groove, and two guide pillars are mutually vertical; This first guide pillar 36 is arranged the first stepper motor 32 and the first precision ball screw 34; This second guide pillar 37 is arranged the second stepper motor 33 and the second precision ball screw 35; Cryogenic sample container 5 is fixed on the first guide pillar 36, be connected with the first precision ball screw 34, the other end of this precision ball screw 34 connects the first stepper motor 32, is drawn by this precision ball screw 34, and this cryogenic sample container 5 moves horizontally along this first guide pillar 36; This first guide pillar 36 connects the second precision ball screw 35, and the other end of this second precision ball screw 35 connects the second stepper motor 33, is drawn by this second precision ball screw 35, and the first guide pillar 36 moves horizontally along this second guide pillar 37.
Device as above, wherein, this driving and data acquisition system (DAS) 4 comprise driving and the control module of output signal collection and display unit and single unit system.
On the other hand, the present invention includes a kind of method applying the block high-temperature superconductor Trapped field of measurement device as above, comprise the steps:
A. first magnetized by superconductor, and be fixed on and fill in the cryogenic sample container 5 of liquid nitrogen, this cryogenic sample container 5 is fixed in two-dimensional level travel mechanism 3;
B. Hall element is fixed in vertical movement mechanism, determines the distance between Hall element and superconducting sample by the stepper motor 21 of driving vertical movement mechanism 2;
C. control two stepper motors 32,33, make sample relatively and Hall element do tangential movement;
D. the coordinate figure of horizontal direction and the measurement data of Hall element is gathered;
E. Trapped Field data and the Distribution of Magnetic Field figure of superconducting sample can be obtained with the data collected mapping.
Method as above, wherein, the operation of magnetizing of this steps A adopts external magnetic field, or drives magnet and superconductor close by described vertical movement mechanism 2, magnetizes after cooling superconductor to liquid nitrogen temperature to superconductor.
Method as above, wherein, the maximum horizontal sweep limit of this device is 150mm × 150mm, and vertical displacement is 100mm, and minimum stepper distances is 25 microns.
Again on the one hand, the present invention includes the method for application measurement device magnetic material Surface field as above and Distribution of Magnetic Field, comprise the steps:
A. first sample of magnetic material is fixed in two-dimensional level travel mechanism 3;
B. Hall element is fixed in vertical movement mechanism, determines the distance between Hall element and sample of magnetic material by the stepper motor 21 of driving vertical movement mechanism 2;
C. control two stepper motors 32,33, make sample relatively and Hall element do tangential movement;
D. the coordinate figure of horizontal direction and the measurement data of Hall element is gathered;
E. Surface field and the Distribution of Magnetic Field figure of sample of magnetic material can be obtained with the data collected mapping.
Beneficial effect of the present invention is: utilize apparatus and method of the present invention can realize measuring the Trapped field of high-temperature superconducting block and compare sample.The Trapped field measurement mechanism that the present invention provides can be given in the superconduction block material after being magnetized by externally-applied magnetic field quantitatively and utilize this device to carry Trapped Field numerical value and the distribution of magnet magnetized superconduction block material.
Accompanying drawing explanation
Fig. 1 is the front view of block high-temperature superconductor Trapped field measurement mechanism in embodiment 1.
Fig. 2 is the structural representation of two-dimensional level travel mechanism in embodiment 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1 block high-temperature superconductor Trapped field measurement mechanism
As depicted in figs. 1 and 2, it comprises frame 1 to the block high-temperature superconductor Trapped field measurement mechanism of a kind of preferred implementation of the present invention, vertical movement mechanism 2, two-dimensional level travel mechanism 3, drive and data acquisition system (DAS) 4, cryogenic sample container 5, magnetize with magnet 6 and Hall element 7.Vertical movement mechanism 2 is fixed in frame 1, magnetizes and is fixed in this vertical movement mechanism 2 with magnet 6 or Hall element 7; Two-dimensional level travel mechanism 3 is fixed in frame 1, and is positioned at the below of vertical movement mechanism 2, and cryogenic sample container 5 is positioned in this two-dimensional level travel mechanism 3; Vertical movement mechanism 2 and two-dimensional level travel mechanism 3 are connected with driving and data acquisition system (DAS) 4 respectively.
Vertical movement mechanism 2 is made up of stepper motor 21, precision ball screw 22 and the guide pillar 23 with slide-and-guide groove; This precision ball screw 22 one end connects stepper motor 21, and the other end connects this and magnetizes with magnet 6 or Hall element 7.
Two-dimensional level travel mechanism 3 comprises a sample holder; Sample holder is made up of first guide pillar 36 and the second guide pillar 37 with slide-and-guide groove, and two guide pillars are mutually vertical; First guide pillar 36 is arranged the first stepper motor 32 and the first precision ball screw 34; Second guide pillar 37 is arranged the second stepper motor 33 and the second precision ball screw 35; Cryogenic sample container 5 is fixed on the first guide pillar 36, is connected with the first precision ball screw 34, and the other end of precision ball screw 34 connects the first stepper motor 32, is drawn by precision ball screw 34, and cryogenic sample container 5 moves horizontally along the first guide pillar 36; The other end that first guide pillar 36 connects the second precision ball screw 35, second precision ball screw 35 connects the second stepper motor 33, and drawn by the second precision ball screw 35, the first guide pillar 36 moves horizontally along the second guide pillar 37.
The maximum horizontal sweep limit of this device is 150mm × 150mm, and vertical displacement is 100mm, and minimum stepper distances is 25 microns.
The block high-temperature superconductor Trapped field of embodiment 2 is measured
Device described in Application Example 1, measuring process is as follows:
A. first magnetized by superconductor, operation of magnetizing can adopt external magnetic field, drives to magnetize and uses magnet 6 and superconductor close, magnetize after cooling superconductor to liquid nitrogen temperature to superconductor in the present embodiment by vertical movement mechanism 2.Stepper motor 21 drives leading screw that charged magnet 6 is moved up and down, the distance between charged magnet and sample can be determined, (distance=screw lead of stepper motor every action one step is multiplied by motor stepping angle divided by 360 degree) according to the rotational angle of stepper motor and the helical pitch of screw mandrel.Temperature rising liquid nitrogen temperature will be kept, if can have an impact to measurement result after superconductor magnetizes always.
B. being replaced to magnetize by Hall element 7 is fixed in vertical movement mechanism 2 with magnet 6, determines the distance between Hall element 7 and superconducting sample by the stepper motor 21 of driving vertical movement mechanism 2.The minimum scanning area of Hall element is 0.01mm
2, magnetic-field measurement scope is ± 5T, working temperature 1.5-350K.
C. control two stepper motors 32,33, make sample relatively and Hall element 7 do tangential movement.
D. the coordinate figure of horizontal direction and the measurement data of Hall element is gathered.
E. Trapped Field data and the Distribution of Magnetic Field figure of superconducting sample can be obtained with the data collected mapping.
Claims (10)
1. apply the method that block high-temperature superconductor Trapped field measured by block high-temperature superconductor Trapped field measurement mechanism, it is characterized in that, the method comprises the steps:
A. first magnetized by superconductor, and be fixed on and fill in the cryogenic sample container (5) of liquid nitrogen, this cryogenic sample container (5) is fixed in two-dimensional level travel mechanism (3);
B. Hall element is fixed in vertical movement mechanism, determines the distance between Hall element and superconducting sample by the stepper motor (21) of driving vertical movement mechanism (2);
C. control two stepper motors (32,33), make sample relatively and Hall element do tangential movement;
D. the coordinate figure of horizontal direction and the measurement data of Hall element is gathered;
E. Trapped Field data and the Distribution of Magnetic Field figure of superconducting sample can be obtained with the data collected mapping;
This block high-temperature superconductor Trapped field measurement mechanism comprises frame (1), vertical movement mechanism (2), two-dimensional level travel mechanism (3), drive and data acquisition system (DAS) (4), cryogenic sample container (5), magnetizes with magnet (6) and Hall element (7);
This vertical movement mechanism (2) is fixed in frame (1), magnetizes and is fixed in this vertical movement mechanism (2) with magnet (6) or Hall element (7);
This two-dimensional level travel mechanism (3) is fixed in frame (1), and is positioned at the below of vertical movement mechanism (2), and cryogenic sample container (5) is fixed in this two-dimensional level travel mechanism (3);
This vertical movement mechanism (2) and two-dimensional level travel mechanism (3) are connected with driving and data acquisition system (DAS) (4) respectively.
2. the method for claim 1, is characterized in that, described vertical movement mechanism (2) is made up of stepper motor (21), precision ball screw (22) and the guide pillar (23) with slide-and-guide groove; This precision ball screw (22) one end connects stepper motor (21), and the other end connects this and magnetizes with magnet (6) or Hall element (7).
3. the method for claim 1, is characterized in that, described two-dimensional level travel mechanism (3) comprises a sample holder; This sample holder is made up of first guide pillar (36) and the second guide pillar (37) with slide-and-guide groove, and two guide pillars are mutually vertical; This first guide pillar (36) is arranged the first stepper motor (32) and the first precision ball screw (34); This second guide pillar (37) is arranged the second stepper motor (33) and the second precision ball screw (35); Cryogenic sample container (5) is fixed on the first guide pillar (36), be connected with the first precision ball screw (34), the other end of this precision ball screw (34) connects the first stepper motor (32), drawn by this precision ball screw (34), this cryogenic sample container (5) moves horizontally along this first guide pillar (36); This first guide pillar (36) connects the second precision ball screw (35), the other end of this second precision ball screw (35) connects the second stepper motor (33), drawn by this second precision ball screw (35), the first guide pillar (36) moves horizontally along this second guide pillar (37).
4. the method for claim 1, is characterized in that, described driving and data acquisition system (DAS) (4) comprise driving and the control module of output signal collection and display unit and single unit system.
5. the method according to any one of claim 1-4, it is characterized in that, the operation of magnetizing of described steps A adopts external magnetic field, or by described vertical movement mechanism (2) drive magnet and superconductor close, cool after superconductor to liquid nitrogen temperature and superconductor magnetized.
6. the method according to any one of claim 1-4, is characterized in that, the maximum horizontal sweep limit of described device is 150mm × 150mm, and vertical displacement is 100mm, and minimum stepper distances is 25 microns.
7. apply the method that block high-temperature superconductor Trapped field measurement mechanism measures magnetic material Surface field and Distribution of Magnetic Field, it is characterized in that, the method comprises the steps:
A. first sample of magnetic material is fixed in two-dimensional level travel mechanism (3);
B. Hall element is fixed in vertical movement mechanism, determines the distance between Hall element and sample of magnetic material by the stepper motor (21) of driving vertical movement mechanism (2);
C. control two stepper motors (32,33), make sample relatively and Hall element do tangential movement;
D. the coordinate figure of horizontal direction and the measurement data of Hall element is gathered;
E. Surface field and the Distribution of Magnetic Field figure of sample of magnetic material can be obtained with the data collected mapping;
This block high-temperature superconductor Trapped field measurement mechanism comprises frame (1), vertical movement mechanism (2), two-dimensional level travel mechanism (3), drive and data acquisition system (DAS) (4), cryogenic sample container (5), magnetizes with magnet (6) and Hall element (7);
This vertical movement mechanism (2) is fixed in frame (1), magnetizes and is fixed in this vertical movement mechanism (2) with magnet (6) or Hall element (7);
This two-dimensional level travel mechanism (3) is fixed in frame (1), and is positioned at the below of vertical movement mechanism (2), and cryogenic sample container (5) is fixed in this two-dimensional level travel mechanism (3);
This vertical movement mechanism (2) and two-dimensional level travel mechanism (3) are connected with driving and data acquisition system (DAS) (4) respectively.
8. method as claimed in claim 7, is characterized in that, described vertical movement mechanism (2) is made up of stepper motor (21), precision ball screw (22) and the guide pillar (23) with slide-and-guide groove; This precision ball screw (22) one end connects stepper motor (21), and the other end connects this and magnetizes with magnet (6) or Hall element (7).
9. method as claimed in claim 7, it is characterized in that, described two-dimensional level travel mechanism (3) comprises a sample holder; This sample holder is made up of first guide pillar (36) and the second guide pillar (37) with slide-and-guide groove, and two guide pillars are mutually vertical; This first guide pillar (36) is arranged the first stepper motor (32) and the first precision ball screw (34); This second guide pillar (37) is arranged the second stepper motor (33) and the second precision ball screw (35); Cryogenic sample container (5) is fixed on the first guide pillar (36), be connected with the first precision ball screw (34), the other end of this precision ball screw (34) connects the first stepper motor (32), drawn by this precision ball screw (34), this cryogenic sample container (5) moves horizontally along this first guide pillar (36); This first guide pillar (36) connects the second precision ball screw (35), the other end of this second precision ball screw (35) connects the second stepper motor (33), drawn by this second precision ball screw (35), the first guide pillar (36) moves horizontally along this second guide pillar (37).
10. method as claimed in claim 7, is characterized in that, described driving and data acquisition system (DAS) (4) comprise driving and the control module of output signal collection and display unit and single unit system.
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| WO2015156883A2 (en) * | 2014-01-22 | 2015-10-15 | National Oilwell Varco, L.P. | Systems and methods for activation of trapped field magnets |
| CN109841372B (en) * | 2019-03-06 | 2021-01-01 | 上海交通大学 | High-temperature superconducting stacked strip excitation device |
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| CN1619268A (en) * | 2003-11-21 | 2005-05-25 | 北京有色金属研究总院 | Measuring device of block high temperature superconductor magnetic suspension floating force and its testing method |
| CN1963555A (en) * | 2006-12-08 | 2007-05-16 | 哈尔滨工业大学 | Three-dimension measuring apparatus and method for space magnetic field of minitype permanent-magnet |
| JP2008165874A (en) * | 2006-12-27 | 2008-07-17 | Funai Electric Co Ltd | Magnetic field distribution measuring device, temperature distribution measuring device, magnetic field distribution measuring method, and temperature distribution measuring method |
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