CN208636237U - A kind of high temperature superconducting film critical current non-destructive detecting device - Google Patents
A kind of high temperature superconducting film critical current non-destructive detecting device Download PDFInfo
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- CN208636237U CN208636237U CN201821462236.7U CN201821462236U CN208636237U CN 208636237 U CN208636237 U CN 208636237U CN 201821462236 U CN201821462236 U CN 201821462236U CN 208636237 U CN208636237 U CN 208636237U
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- linear guide
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- displacement sensor
- laser displacement
- longitudinal
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Abstract
A kind of high temperature superconducting film critical current non-destructive detecting device, composition is mainly: vertically-mounted in the Dewar on lower plate to have teflon rod, circular ptfe sheet is fixed on teflon rod top；Cross bar is connected between four columns on lower plate；Longitudinal linear guide is fixed on the cross bar of left side, longitudinal linear guide end is fixed with longitudinal laser displacement sensor；Longitudinal slide rail is fixed on the cross bar of right side；Lateral linear guide both ends are fixed on the slide unit and sliding rail of longitudinal linear guide；Lateral linear guide end is fixed with lateral laser displacement sensor；Vertical lines guide rail middle and lower part is fixed on lateral linear guide slide unit, the fixed vertical laser displacement sensor in top；Vertical lines guide rail slide unit bottom thread connection: the vertical strut that bottom end has the strut of low temperature hall probe array or bottom to have Helmholtz coil.The device can accurately obtain the critical current inhomogeneities distributed data of high temperature superconducting film.
Description
Technical field
The utility model relates to a kind of high temperature superconducting film critical current detection devices.
Background technique
The superconductive device prepared using high-temperature superconducting thin film is widely used in person in electronics.High-temperature superconducting thin film faces
Fundamental characteristics one of of boundary's electric current as high-temperature superconducting thin film, stability and power termination energy to the working characteristics of superconductive device
Power has decisive significance.Therefore, it is necessary to the critical currents to high temperature superconducting film to detect.
There are two types of high temperature superconducting film critical current detection methods, and first method is direct transportation resources, i.e. four leads
Method, the method needs made by way of physical damage on high temperature superconducting film four electrodes be respectively used to connection current source and
Voltmeter, voltage while being increasing electric current between measurement voltage lead, until its voltage reaches 1 μ V/cm；It corresponds at this time
Current value be critical current value.Its defect is: the manufacturing process of four electrodes is not only cumbersome and can be to high temperature superconducting film
Generate irreversible physical damnification；Operate it is careless slightly, make current source apply electric current it is excessive, high temperature superconducting film will be burnt.
Second method is magnetic survey method, the main critical current using triple-frequency harmonics method measurement high temperature superconducting film, way
It is: by one group of magnet exciting coil and detection coil in close proximity to high temperature superconducting film, the alternation electricity constantly increased is passed through to magnet exciting coil
Stream magnetizes high temperature superconducting film, while the third harmonic voltage generated in observational record detection coil.Pass through the inspection observed
The alternating current curve being passed through in induct third harmonic voltage and magnet exciting coil in test coil, obtains the critical electricity of detection zone
Flow valuve.This method has rigors to detection coil, magnet exciting coil arrangement position: arranging respectively if will test coil and magnet exciting coil
Cloth is in the two sides of high temperature superconducting film, it will make the limitation of the fixed position of two coil Yin Duwa volumes and high temperature superconducting film and cannot
It is enough flexibly mobile, and then high temperature superconducting film whole surface critical current cannot completely be measured；And it will test coil and excitation
Coil configuration can be such that the magnetic field of magnet exciting coil directly has an impact to detection coil in the same side of high temperature superconducting film, to disappear
Except this influence, needs additionally to add bucking coil or the data of acquisition are calibrated with the reliability that just can ensure that data.
It in addition, the limitation of detection coil and magnet exciting coil due to technique and material, cannot make too small, result in facing for measurement in this way
The region area of boundary's electric current is larger, and the accurate corresponding relationship of the position and critical current that cannot obtain high temperature superconducting film (namely faces
The inhomogeneities of boundary's electric current is distributed), and then the reason for showing that critical current is low cannot be analyzed, it also just can not be raising high-temperature superconductor
The preparation process amelioration for the critical current that film faces provides effective foundation.
Utility model content
The utility model provides a kind of high temperature superconducting film critical current non-destructive detecting device, which can be more accurate
It obtains the critical current inhomogeneities distributed data of high temperature superconducting film, obtains the low reason of critical current convenient for analysis, to improve
Technique provides more effective foundation with the critical current for improving high temperature superconducting film.
The utility model realizes its goal of the invention the technical scheme adopted is that a kind of high temperature superconducting film critical current is lossless
Detection device, composition is:
Fluted on lower plate, open Dewar is fixed in groove, vertically-mounted in Dewar to have teflon rod, circle
The connection handle that the ptfe sheet of shape is stretched out is fixed on teflon rod top；Four are further fixed on lower plate to stand
Column is connected with cross bar between column top；
Longitudinal linear guide is fixed on the cross bar in left side, the one end of longitudinal linear guide is fixed with longitudinal laser displacement
Sensor, and the working face of longitudinal laser displacement sensor is towards the slide unit of longitudinal linear guide；It is fixed on the cross bar on right side
Longitudinal sliding rail；The left end of lateral linear guide and right end are separately fixed at the slide unit of longitudinal linear guide and the sliding block of sliding rail
On；The one end of lateral linear guide is fixed with lateral laser displacement sensor, and the working face of lateral laser displacement sensor
Lateral laser displacement sensor towards lateral linear guide slide unit；The middle and lower part of vertical lines guide rail is fixed on lateral straight line and leads
The side of the slide unit of rail；Meanwhile the top of vertical lines guide rail is fixed with vertical laser displacement sensor, and vertical laser displacement
Slide unit of the working face of sensor towards vertical lines guide rail；The bottom of vertical lines guide rail slide unit, which is equipped with, connects vertical strut
Threaded connection hole；The vertical strut is two kinds, and one kind is top band connection screw thread, and bottom end is equipped with low temperature hall probe battle array
Column, another kind are top band connection screw thread, and bottom end is equipped with Helmholtz coil；The diameter of the Helmholtz coil is greater than poly-
The diameter of tetrafluoroethene thin slice；
The motor of longitudinal linear guide, the motor of lateral linear guide, the motor of vertical lines guide rail, longitudinal direction are swashed
Optical displacement sensor, lateral laser displacement sensor and vertical laser displacement sensor are electrically connected with the controller.
The course of work and application method of the utility model are:
A, cooling
High temperature superconducting film is placed in ptfe sheet center, liquid nitrogen is then filled into Dewar, until Dewar
Middle liquid nitrogen floods high temperature superconducting film completely, and liquid nitrogen stops boiling；
B, excitation
The threaded connection hole of the slide unit bottom of vertical lines guide rail and bottom end are equipped with to the vertical strut of Helmholtz coil
Connection；Longitudinal laser displacement sensor, lateral laser displacement sensor, vertical laser displacement sensor monitor longitudinal straight line respectively
The position of the slide unit of the slide unit of guide rail, the slide unit of lateral linear guide and vertical lines guide rail；And the position of these slide units is believed
Number as feedback signal transmission to controller；Controller controls longitudinal linear guide motor, lateral linear guide motor, vertical straight
The movement of the motor of line guide rail makes the center of the uniform magnetic field region of Helmholtz coil run to the centre bit of high temperature superconducting film
It sets, after liquid nitrogen in Dewar no longer acutely boils, controller controls Helmholtz coil again and moves in sustained height plane, makes
High temperature superconducting film is completely inswept by Helmholtz coil uniform magnetic field region, completes the excitation of high temperature superconducting film；Then, controller control
Make the movement of longitudinal linear guide motor, lateral linear guide motor, vertical lines guide rail motor so that Helmholtz coil from
High temperature superconducting film is opened, and rises to liquid nitrogen or more；
C, critical current is tested
Bottom end is unloaded from the threaded connection hole of the slide unit of vertical lines guide rail equipped with the vertical strut of Helmholtz coil
Under, then the vertical strut company by the threaded connection hole of the slide unit of vertical lines guide rail and bottom end equipped with low temperature hall probe array
It connects；The position signal of the slide unit for the vertical lines guide rail that controller is transmitted according to vertical laser displacement sensor controls vertical straight
The movement of line guide rail motor drives low temperature hall probe array to run to high-temperature superconductor by vertical lines guide rail, vertical strut
Above film at setting height；After liquid nitrogen not reboiling, controller controls the motor of longitudinal linear guide, lateral linear guide
The movement of motor makes the slide unit of lateral linear guide carry out the unidirectional intermittent movement of slide unit of back and forth movement, longitudinal linear guide, makes
Obtain the progressive scan detection that low temperature hall probe array completes high-temperature superconductor film surface；Under detecting low temperature hall probe array just
The magnetic induction intensity vertical component of high temperature superconducting film at side, controller are obtained accordingly and are recorded immediately below low temperature hall probe array
Locate the realtime critical electric current of high temperature superconducting film；
Meanwhile longitudinal linear guide that controller measures longitudinal laser displacement sensor and lateral laser displacement sensor
Slide unit position and lateral linear guide slide unit position real-time record, namely obtain the real-time of low temperature hall probe array
Two-dimensional coordinate position；
By the Real-time Two-dimensional coordinate position of low temperature hall probe array and realtime critical currents match, high temperature superconducting film is obtained
The position distribution relationship of upper critical current.
Compared with prior art, the utility model has the beneficial effects that
One, the utility model is vertical as acquisition high temperature superconducting film surface induction intensity using low temperature hall probe array
The device of component, small in size, the region area of single measurement critical current is small；Meanwhile passing through longitudinally, laterally three linear guides
Mould group drives low temperature hall probe array mobile, enables low temperature hall probe array flexibly accurate in sufficiently large space
It is mobile, therefore can adapt to the critical current test of different size, high temperature superconducting film of different shapes.
Two, the utility model carries out experimental data positioning by laser displacement sensor, realizes the critical of high temperature superconducting film
The matching of the plan-position coordinate of current value and high temperature superconducting film, can accurately obtain high temperature superconducting film critical current not
Uniform-distributed Data obtains the low reason of critical current convenient for analysis, to improve critical electricity of the technique to improve high temperature superconducting film
Stream provides more effective foundation.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of the utility model embodiment.
Fig. 2 is the overlooking structure diagram of the utility model embodiment.
Specific implementation method
Embodiment
Fig. 1, Fig. 2 shows a kind of specific embodiment of the utility model is that a kind of high temperature superconducting film critical current is lossless
Detection device, composition is:
Fluted on lower plate 1, open Dewar 4 is fixed in groove, vertically-mounted in Dewar 4 to have teflon rod
5, the connection handle 6a that circular ptfe sheet 6 is stretched out is fixed on 5 top of teflon rod；It is also fixed on lower plate 1
There are four columns 3, column is connected with cross bar 13 between 3 top；
Longitudinal linear guide 7 is fixed on the cross bar 13 in left side, the one end of longitudinal linear guide 7 is fixed with longitudinal laser
Displacement sensor 12a, and slide unit 7a of the working face towards longitudinal linear guide 7 of longitudinal laser displacement sensor 12a；Right side
Longitudinal sliding rail 10 is fixed on cross bar 13；The left end of lateral linear guide 8 and right end are separately fixed at longitudinal linear guide 7
On the sliding block 10a of slide unit 7a and sliding rail 10；The one end of lateral linear guide 8 is fixed with lateral laser displacement sensor 12b, and
Lateral laser displacement sensor 12b of the working face of lateral laser displacement sensor 12b towards lateral 8 slide unit 8a of linear guide；
The middle and lower part of vertical lines guide rail 9 is fixed on the side of the slide unit 8a of lateral linear guide 8；Meanwhile the top of vertical lines guide rail 9
End is fixed with vertical laser displacement sensor 12c, and the working face of vertical laser displacement sensor 12c is towards vertical lines guide rail
9 slide unit 9a；The bottom of 9 slide unit 9a of vertical lines guide rail is equipped with the threaded connection hole for connecting vertical strut 11；Described is vertical
Strut 11 is two kinds, and one kind is top band connection screw thread, and bottom end is equipped with low temperature hall probe array, and another kind is top band connection
Screw thread, bottom end are equipped with Helmholtz coil；The diameter of the Helmholtz coil is greater than the diameter of ptfe sheet 6；
The motor of longitudinal linear guide 7, the motor of lateral linear guide 8, vertical lines guide rail 9 motor, vertical
It is electric with controller to laser displacement sensor 12a, transverse direction laser displacement sensor 12b and vertical laser displacement sensor 12c
Connection.
A kind of high temperature superconducting film critical current non-destructive detecting device progress high temperature superconducting film critical current inspection using this example
The method of survey, specific practice are:
A, cooling
High temperature superconducting film is placed in 6 center of ptfe sheet, then fills liquid nitrogen into Dewar 4, until Du
Liquid nitrogen floods high temperature superconducting film completely in watts 4, and liquid nitrogen stops boiling；
B, excitation
The threaded connection hole of the bottom slide unit 9a of vertical lines guide rail 9 and bottom end are equipped with to the vertical branch of Helmholtz coil
Bar 11 connects；Longitudinal laser displacement sensor 12a, lateral laser displacement sensor 12b, vertical laser displacement sensor 12c points
Not Jian Ce the slide unit 7a of longitudinal linear guide 7, the slide unit 8a of lateral linear guide 8 and vertical lines guide rail 9 slide unit 9a position
It sets；And using the position signal of these slide units as feedback signal transmission to controller；Controller controls longitudinal 7 electricity of linear guide
Machine, lateral 8 motor of linear guide, vertical lines guide rail 9 motor movement, make in the uniform magnetic field region of Helmholtz coil
The heart runs to the center of high temperature superconducting film, and after liquid nitrogen in Dewar 4 no longer acutely boils, controller controls Helmholtz again
Coil moves in sustained height plane, keeps high temperature superconducting film completely inswept by Helmholtz coil uniform magnetic field region, completes high
The excitation of temperature superconductive film；Then, controller controls 7 motor of longitudinal linear guide, 8 motor of lateral linear guide, vertical lines and leads
The movement of 9 motor of rail, so that Helmholtz coil leaves high temperature superconducting film, and rises to liquid nitrogen or more；
C, critical current is tested
The threaded connection hole of vertical strut 11 by bottom end equipped with Helmholtz coil from the slide unit 9a of vertical lines guide rail 9
In unload, then by the threaded connection hole of the slide unit 9a of vertical lines guide rail 9 and bottom end equipped with the vertical of low temperature hall probe array
Strut 11 connects；Controller is believed according to the position of the slide unit 9a of the vertical laser displacement sensor 12c vertical lines guide rail 9 transmitted
Number, the movement of 9 motor of vertical lines guide rail is controlled, low temperature hall probe battle array is driven by vertical lines guide rail 9, vertical strut 11
At column operation to setting height above high temperature superconducting film；After liquid nitrogen not reboiling, controller controls the electricity of longitudinal linear guide 7
Machine, lateral linear guide 8 motor movement, so that the slide unit of lateral linear guide 8 is carried out back and forth movement, longitudinal linear guide 7
The unidirectional intermittent movement of slide unit so that low temperature hall probe array complete high-temperature superconductor film surface progressive scan detection；Detection
Out immediately below low temperature hall probe array at high temperature superconducting film magnetic induction intensity vertical component, controller obtains and records accordingly
The realtime critical electric current of high temperature superconducting film at immediately below low temperature hall probe array；
Meanwhile the longitudinal direction that controller measures longitudinal laser displacement sensor 12a and transverse direction laser displacement sensor 12b is straight
The real-time record of the position of the slide unit 7a of line guide rail 7 and the position slide unit 8a of lateral linear guide 8, namely obtain the spy of low temperature Hall
The Real-time Two-dimensional coordinate position of head array；
By the Real-time Two-dimensional coordinate position of low temperature hall probe array and realtime critical currents match, high temperature superconducting film is obtained
The position distribution relationship of upper critical current.
Claims (1)
1. a kind of high temperature superconducting film critical current non-destructive detecting device, composition is:
Fluted on lower plate (1), open Dewar (4) is fixed in groove, vertically-mounted in Dewar (4) to have polytetrafluoroethylene (PTFE)
Bar (5), the connection handle (6a) that circular ptfe sheet (6) is stretched out are fixed on teflon rod (5) top；Lower plate
(1) it is further fixed on four columns (3), is connected with cross bar (13) between column (3) top；
It is fixed with longitudinal linear guide (7) on the cross bar (13) in left side, the one end of longitudinal linear guide (7) is fixed with longitudinal sharp
Optical displacement sensor (12a), and slide unit of the working face towards longitudinal linear guide (7) of longitudinal laser displacement sensor (12a)
(7a)；Longitudinal sliding rail (10) are fixed on the cross bar (13) on right side；The left end of lateral linear guide (8) and right end are fixed respectively
On the slide unit (7a) of longitudinal linear guide (7) and the sliding block (10a) of sliding rail (10)；The one end of lateral linear guide (8) is solid
Surely have lateral laser displacement sensor (12b), and the working face of lateral laser displacement sensor (12b) is towards lateral linear guide
(8) the lateral laser displacement sensor (12b) of slide unit (8a)；The middle and lower part of vertical lines guide rail (9) is fixed on lateral straight line and leads
The side of the slide unit (8a) of rail (8)；Meanwhile the top of vertical lines guide rail (9) is fixed with vertical laser displacement sensor
(12c), and slide unit (9a) of the working face towards vertical lines guide rail (9) of vertical laser displacement sensor (12c)；Vertical lines
The bottom of guide rail (9) slide unit (9a) is equipped with the threaded connection hole for connecting vertical strut (11)；The vertical strut (11) is two
Kind, one kind is top band connection screw thread, and bottom end is equipped with low temperature hall probe array, and another kind is top band connection screw thread, bottom end
Equipped with Helmholtz coil；The diameter of the Helmholtz coil is greater than the diameter of ptfe sheet (6)；
The motor of longitudinal linear guide (7), the motor of lateral linear guide (8), vertical lines guide rail (9) motor,
Longitudinal laser displacement sensor (12a), lateral laser displacement sensor (12b) and vertical laser displacement sensor (12c) with
Controller electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821462236.7U CN208636237U (en) | 2018-09-07 | 2018-09-07 | A kind of high temperature superconducting film critical current non-destructive detecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821462236.7U CN208636237U (en) | 2018-09-07 | 2018-09-07 | A kind of high temperature superconducting film critical current non-destructive detecting device |
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| Publication Number | Publication Date |
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| CN208636237U true CN208636237U (en) | 2019-03-22 |
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|---|---|---|---|
| CN201821462236.7U Expired - Fee Related CN208636237U (en) | 2018-09-07 | 2018-09-07 | A kind of high temperature superconducting film critical current non-destructive detecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030568A (en) * | 2018-09-07 | 2018-12-18 | 西南交通大学 | A kind of high temperature superconducting film critical current non-destructive testing device and its detection method |
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2018
- 2018-09-07 CN CN201821462236.7U patent/CN208636237U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030568A (en) * | 2018-09-07 | 2018-12-18 | 西南交通大学 | A kind of high temperature superconducting film critical current non-destructive testing device and its detection method |
| CN109030568B (en) * | 2018-09-07 | 2023-09-19 | 西南交通大学 | Nondestructive testing device and method for critical current of high-temperature superconducting film |
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| GR01 | Patent grant | ||
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Granted publication date: 20190322 Termination date: 20210907 |