CN105067790B - A kind of superconducting wire copper hypergeometric on-line testing equipment and its method of testing - Google Patents
A kind of superconducting wire copper hypergeometric on-line testing equipment and its method of testing Download PDFInfo
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Abstract
The invention discloses a kind of superconducting wire copper hypergeometric test equipment, including active paying out machine, on-line testing main frame and the active admission machine with winding displacement.The present invention has test equipment simple, during test the characteristics of completely lossless test, and the present invention can realize the uninterrupted test of superconducting wire copper hypergeometric, substantially increase superconducting wire copper hypergeometric detection efficiency；The invention also discloses the method that the said equipment tests superconducting line copper hypergeometric：Coiled tested superconducting wire is loaded into active paying out machine to be tested, and draws Cu/Sc test curves；Determine the copper hypergeometric of tested superconducting wire.On-line uninterruption test of the present invention, greatly improve testing efficiency, it is adapted to the production in enormous quantities of superconducting wire, and it can intuitively reflect the Cu/Sc tendencies of entire volume superconducting line, test result can as technological design, quality control parameter, can act also as the judgment basis of superconducting line Cu/Sc performance indications.
Description
Technical field
The invention belongs to superconductor technology field and technical field of nondestructive testing, it is related to a kind of superconducting wire copper hypergeometric and surveys online
Equipment is tried, the invention further relates to the detection method of the detection device.
Background technology
With the fast development of new energy technology and medical and health care system, such as International Thermonuclear project (ITER) and nuclear-magnetism
Resonance image-forming (MRI) is required for substantial amounts of superconducting wire, and country's superconductor technology industrialization at present is at the early-stage, in superconducting wire system
The method of being effectively tested is also lacked in copper hypergeometric (Cu/Sc) state modulator during standby.
Cu/Sc be superconducting wire as one of important parameter of finished product, Cu/Sc directly determines the design of superconducting line, and shadow
Superconducting line performance is rung, low copper ratio can increase superconduction area, improve superconducting line performance, but also increase the difficult processing of wire rod simultaneously
Degree, and high-copper but necessarily declines the volume ratio of superconducting phase than that can improve the stability of magnet operation, while superconducting line can be made
The dangerous increase of disconnected core, is unfavorable for improving Jc.
Current Cu/Sc test modes have chemical weight method and image analytical method.Chemical weight method is to take unit length to surpass
Wire material removes copper by chemical attack, then by remaining superconductor of weighing, the transversal of copper Cu and superconduction Sc is calculated according to density
Area ratio；Image method is to take superconducting wire section to be taken pictures by optics Electronic Speculum, then analyzes copper Cu and superconduction Sc cross-sectional area
Than, but both approaches are required for the sampling and testing on complete superconducting line, are to damage detection, and testing efficiency is very low, only
Suitable for the test of the seldom sample in laboratory.
The content of the invention
It is an object of the invention to provide a kind of superconducting wire copper hypergeometric test equipment, the equipment solves existing Cu/Sc and surveyed
Try the problem of can only carrying out damaging detection of equipment presence.
It is a further object of the present invention to provide the method for testing of above-mentioned test equipment, solve what existing detection method was present
Can not continuous on-line detection, the problem of detection can only be damaged.
The technical solution adopted in the present invention is, a kind of superconducting wire copper hypergeometric test equipment, including active paying out machine,
Line test main frame and the active admission machine with winding displacement.
The features of the present invention is also resided in,
Active paying out machine is provided with tension unit, and tension unit adjusts Tensity size by the way of regulation counterweight；Actively
Admission machine realizes the speed governing and commutation of unwrapping wire by the way of variable-frequency motor speed governing, and winding displacement is arranged using the polished rod of Serve Motor Control
Line mode.
On-line testing main frame includes servo-actuated testing jig and integrally disposed digital I/O modules, PXI controllers, GPIB are logical
News module, serial communication module, PXI high-accuracy data acquisitions module, temperature compensation module, programmable current source, programmable receive
Lie prostrate meter, K-type thermocouple, length measurement unit and encoder.
Servo-actuated test is placed in the space of a closing being made of clear material, and is servo-actuated testing jig vertically same by 4 groups
2 groups walked in the cylinder of motion and the cylinder composition of 1 group of horizontal movement, the cylinder of 4 groups of vertical synchronization campaigns are provided with test spy
There are two wires in head, each test probe respectively, two wires are connected respectively to programmable current source and programmable nanovolt meter
On, 2 groups of frictional force for being used to increase servo-actuated testing jig and tested superconducting wire contact surface in addition.
Digital I/O modules, PXI controllers, GPIB communication modules and serial communication module integrated installation are in a having electronic
The temperature of shielding is in 15 DEG C~25 DEG C of cabinet.
Programmable current source is by the way of GPIB general purpose interface bus and computer communication；The output of programmable current source
Constant dc current scope is 1~10 ampere；Programmable nanovolt meter is using GPIB general purpose interface bus by the way of and computer communication, survey
It is 10E-9 volts to try precision.
Test probe selects yellow gold material, and test probe is using elastic plagiodont structure.
Another technical scheme of the present invention is that a kind of superconducting wire copper hypergeometric on-line testing method specifically includes following step
Suddenly：
Step 1, coiled superconducting line is loaded into online test main frame tested, and draw Cu/Sc test curves；
Step 2, the copper hypergeometric for determining superconducting line.
The characteristics of another technical scheme of the invention, also resides in,
Step 1 is specifically implemented according to following steps：
Step 1.1, coiled superconducting line loaded into active paying out machine, pass through superconducting line according to the coiling route of determination
Line test main frame, reaches active admission machine；
Step 1.2, by two test probes abut superconducting line, adjust Cu/Sc sample rate；
Step 1.3, programmable current source may be programmed nanovolt meter test two and test according to the numerical value output current pre-set
The voltage of superconducting line between probe；
Step 1.4, K-type thermocouple is arranged in the superconducting line near surface between two test probes, measures superconducting line temperature；
According to superconducting line temperature, temperature compensation module compensates the electric conductivity difference of material between different temperatures；
The length of step 1.5, the superconducting line flowed through with length measurement unit and encoder record；
Step 1.6, the electric conductivity difference according to superconducting line Cu and Sc at room temperature, each measurement point is calculated with below equation
Copper hypergeometric, Cu/Sc=Beta：
The actual parameter of symbology is in formula：
a：A values are equal to 234.4 at constant under different temperatures, such as 20 DEG C of room temperature；
b：B=a+k, k value 20；
t：The real-time Celsius temperature of tested superconducting line, unit DEG C；
s：Tested superconducting line cross-sectional area,
Rh0：The resistivity of copper, such as oxygen-free copper Rh0=0.0169 at 20 DEG C of room temperature；
Rm：The aggregate resistance value of superconducting line, Rm=Um/Is；
Lg：Superconduction line length, Lg >=12 meter are tested between two test probes；
X：Resistivity multiple of the superconduction core filaments with respect to Rh0, such as Nb-47Ti, X=42；
Step 1.7, flow through length using the superconducting line recorded in step 1.5 and do plane right-angle coordinate abscissa, take same
One moment Cu/Sc does ordinate, by the discrete patterns of computer drawing Cu/Sc-L, is connected each point with " least square fitting method "
Connect to form Cu/Sc-L full curve figures, treat that entire volume superconducting line flows through and just form entire volume line on the Cu/Sc tests on length coordinate
Curve.
In step 1.2, the specific method for adjusting Cu/Sc sample rate is：Adjust active paying out machine, active admission machine
The frequency of retractable linear velocity or test probe Contact Superconducting line, so as to obtain the different measurement point of gap length.
The specific implementation method of step 2 is：By reading on the Cu/Sc test curves drawn through step 1 at correspondence length
Cu/Sc values, determine copper hypergeometric of the superconducting line in corresponding position.
The beneficial effects of the invention are as follows：
1) a kind of superconducting wire copper hypergeometric on-line testing equipment, can be in detection superconduction by setting online test main frame
Non-Destructive Testing is carried out during wire rod copper hypergeometric, and uninterrupted test can be carried out, the detection of superconducting wire copper hypergeometric is substantially increased
Efficiency；
2) a kind of method of testing of superconducting wire copper hypergeometric on-line testing equipment, complete harmless, pollution-free test, keeps away
The waste and the pollution to environment of measured material are exempted from；On-line uninterruption is tested, and greatly improves testing efficiency, particularly with
The production in enormous quantities of superconducting wire is rather important；The Cu/Sc tendencies of entire volume superconducting line can intuitively be reflected, test result can conduct
Technological design, the parameter of quality control, can act also as the judgment basis of superconducting line Cu/Sc performance indications.
Brief description of the drawings：
Fig. 1 is a kind of structural representation of superconducting wire copper hypergeometric test equipment of the invention；
Fig. 2 is the cross-sectional view of test probe in the present invention；
Fig. 3 is that a kind of method of testing test NbTi/Cu of superconducting wire copper hypergeometric on-line testing equipment of the invention is compound super
The test result curve map of wire copper hypergeometric；
Fig. 4 is the copper hypergeometric data acquisition figure of method of testing of the present invention.
In figure, 1. active paying out machines, 2. active admission machines, 3. servo-actuated testing jigs, 4. numeral I/O modules, 5.PXI controls
Device, 6.GPIB communication modules, 7. serial communication modules, 8.PXI high-accuracy data acquisition modules, 9. temperature compensation modules, 10. can
Program current source, 11. programmable nanovolt meters, 12. tested superconducting wires, 13.K type thermocouples, 14. length measurement units, 15. compile
Code device, 16. on-line testing main frames, 17. test probes.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, a kind of superconducting wire copper hypergeometric test equipment of the invention, including active paying out machine 1, on-line testing master
Machine 16 and the active admission machine 2 with winding displacement, on-line testing main frame 16 are arranged between active paying out machine 1 and active admission machine 2.
Wherein, active paying out machine 1 is provided with tension unit, and it is big that tension unit adjusts tension force by the way of regulation counterweight
It is small；Active admission machine 2 realizes the speed governing and commutation of unwrapping wire by the way of variable-frequency motor speed governing, and winding displacement uses Serve Motor Control
Polished rod winding displacement mode；On-line testing main frame 16 includes servo-actuated testing jig 3 and integrally disposed digital I/O modules 4, PXI controls
It is device 5 processed, GPIB communication modules 6, serial communication module 7, PXI high-accuracy data acquisitions module 8, temperature compensation module 9, programmable
Current source 10, programmable nanovolt meter 11, K-type thermocouple 13, length measurement unit 14 and encoder 15.Wherein, it is servo-actuated testing jig 3
In the space for being placed in a closing being made of clear material, testing jig 3 is servo-actuated by the cylinder of 4 groups of vertical synchronization campaigns and 1 group
2 groups in the cylinder composition of horizontal movement, the cylinder of 4 groups of vertical synchronization campaigns are mounted on test probe 17, and each test is visited
There are two wires on first 17 respectively, two wires are connected respectively on programmable current source 10 and programmable nanovolt meter 11；Other 2
Group is used for the frictional force for increasing servo-actuated testing jig 3 and the tested contact surface of superconducting wire 12, makes test by the motion of synchronizing cylinder
Probe 17 is synchronous to contact or is located away from tested superconducting wire 12, in addition, tested superconducting wire 12 is between the two ends guide wheel of arbitrary-movement articulator 3
Length stays constant, ensures that tested superconducting wire length during test every time between test probe 17 also ensures identical according to this；Numeral
I/O modules 4, PXI controllers 5, GPIB communication modules 6 and the integrated installation of serial communication module 7 are 15 DEG C~25 in a temperature
DEG C having electronic shielding cabinet in；Programmable current source 10 by the way of GPIB general purpose interface bus and computer communication,
It is 1~10 ampere that it, which exports constant dc current scope,；Programmable nanovolt meter 11 is also by the way of GPIB general purpose interface bus and meter
Calculation machine is communicated, and measuring accuracy is 10E-9 volts.
As shown in Fig. 2 test probe 17 selects yellow gold material, and using elastic plagiodont structure, to increase probe
The reliability contacted with superconducting wire.
A kind of superconducting wire copper hypergeometric on-line testing method of the present invention, specifically implements according to following steps：
Step 1, coiled superconducting line is loaded into online test main frame 16 tested, and draw Cu/Sc test curves：
Step 1.1, tested superconducting wire 12 loaded into active paying out machine 1, wear superconducting line according to the coiling route of determination
On-line testing main frame 16 is crossed, active admission machine 2 is reached；
Step 1.2, two test probes 17 are abutted into superconducting line, by adjusting active paying out machine 1, active admission machine 2
Retractable linear velocity or the frequency of the Contact Superconducting line of test probe 17 adjust Cu/Sc sample rate；
Step 1.3, programmable current source 10 may be programmed the test of nanovolt meter 11 two according to the numerical value output current pre-set
The voltage of superconducting line between test probe 17；
Step 1.4, K-type thermocouple 13 is arranged in the superconducting line near surface between two test probes, measures superconducting line temperature
Degree；According to superconducting line temperature, temperature compensation module 9 compensates the electric conductivity difference of material between different temperatures；
The length of step 1.5, the superconducting line flowed through with length measurement unit 14 and the record of encoder 15；
Step 1.6, the electric conductivity difference according to superconducting line Cu and Sc at room temperature, each measurement point is calculated with below equation
Copper hypergeometric, Cu/Sc=Beta：
The actual parameter of symbology is in formula：
a：A values are equal to 234.4 at constant under different temperatures, such as 20 DEG C of room temperature；
b：B=a+k, k value 20；
t：The real-time Celsius temperature of tested superconducting line, unit DEG C；
s：Tested superconducting line cross-sectional area,
Rh0：The resistivity of copper, such as oxygen-free copper Rh0=0.0169 at 20 DEG C of room temperature；
Rm：The aggregate resistance value of superconducting line, Rm=Um/Is；
Lg：Superconduction line length, Lg >=12 meter are tested between two test probes；
X：Resistivity multiple of the superconduction core filaments with respect to Rh0, such as Nb-47Ti, X=42；
Step 1.7, flow through length using the superconducting line recorded in step 1.5 and do plane right-angle coordinate abscissa, take same
One moment Cu/Sc does ordinate, by the discrete patterns of computer drawing Cu/Sc-L, is connected each point with " least square fitting method "
Connect to form Cu/Sc-L full curve figures, treat that entire volume superconducting line flows through and just form entire volume line on the Cu/Sc tests on length coordinate
Curve.
Step 2, by read through step 1 draw Cu/Sc test curves on correspondence length at Cu/Sc values, it is determined that surpass
Copper hypergeometric of the wire in corresponding position.
As shown in figure 3, NbTi/Cu complex superconducting linear diametersDesign copper hypergeometric Beta=2.2；Use
The curve that this method test is obtained may be directly applied to choose the superconducting line for meeting certain copper hypergeometric requirement, such as require that copper hypergeometric is public
Poor scope is ± 6%Beta, then can determine that wire rod head clips 340 meters, it is satisfaction that afterbody, which clips 150 meters, i.e. center section,
It is required that superconduction line segment.
As shown in figure 4, the data and curve that are measured according to online equipment, depict that " * 1013-*1204# superconducting lines copper surpasses
Sampled than on-line testing curve and 9 points " figure, upper diagram data and the contrast of conventional chemical methods measurement result are as shown in table 1, it is seen that this
Invention method of testing is compared with conventional chemical methods, and the test result of 1-9 points is almost identical, illustrates that method of testing of the present invention can be
Do not destroy the lossless copper hypergeometric for testing out superconducting wire in the case of superconducting wire, test effect and existing chemical method almost without
It is different.
Table 1*1013-*1204# superconducting lines on-line testing and 9 sampling rates pair of chemical method test result
Claims (1)
1. a kind of superconducting wire copper hypergeometric method of testing, used test equipment includes active paying out machine (1), on-line testing main frame
(16) the active admission machine (2) and with winding displacement, it is characterised in that the method for testing specifically includes following steps：
Step 1, coiled tested superconducting wire (12) is loaded into active paying out machine (1) tested, and draw Cu/Sc test songs
Line；
Step 1.1, tested superconducting wire (12) loaded into active paying out machine (1), according to the coiling route of determination by tested superconduction
Wire rod (12) passes through on-line testing main frame (16), reaches active admission machine (2)；
Step 1.2, by two test probes (17) abut superconducting line, by adjusting active paying out machine (1), active admission machine (2)
Retractable linear velocity or test probe (17) Contact Superconducting line frequency, so that the different measurement point of gap length is obtained, with this
Adjust Cu/Sc sample rate；
Step 1.3, programmable current source (10) may be programmed nanovolt meter (11) test two according to the numerical value output current pre-set
The voltage of superconducting line between test probe；
Step 1.4, K-type thermocouple (13) is arranged in the superconducting line near surface between two test probes (17), measures superconducting line
Temperature；According to superconducting line temperature, temperature compensation module (9) compensates the electric conductivity difference of material between different temperatures；
The length of step 1.5, the superconducting line flowed through with length measurement unit (14) and encoder (15) record；
Step 1.6, the electric conductivity difference according to superconducting line Cu and Sc at room temperature, calculate the copper hypergeometric of each measurement point, Cu/Sc；
The calculating of copper hypergeometric uses formula (1), wherein Cu/Sc=Beta：
The actual parameter of symbology is in formula (1)：
a：A values are equal to 234.4；
b：B=a+k, k value 20；
t：The real-time Celsius temperature of tested superconducting line, unit DEG C；
s：Tested superconducting line cross-sectional area,
Rh0：The resistivity of copper at 20 DEG C of room temperature；
Rm：The aggregate resistance value of superconducting line, Rm=Um/Is；
Lg：Superconduction line length, Lg >=12 meter are tested between two test probes；
X：Resistivity multiple of the superconduction core filaments with respect to Rh0, superconduction core filaments are Nb-47Ti, X=42；
Step 1.7, flow through length using the superconducting line recorded in step 1.5 and do plane right-angle coordinate abscissa, take with for the moment
Carve Cu/Sc and do ordinate, by the discrete patterns of computer drawing Cu/Sc-L, each point is connected into shape with " least square fitting method "
Into Cu/Sc-L full curve figures, treat that entire volume superconducting line flows through and just form entire volume line on the Cu/Sc test songs on length coordinate
Line；
Step 2, the copper hypergeometric for determining tested superconducting wire (12)；
By reading the Cu/Sc values on the Cu/Sc test curves drawn through step 1 at correspondence length, tested superconducting wire is determined
(12) in the copper hypergeometric of corresponding position.
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| CN110823747B (en) * | 2019-10-30 | 2022-02-22 | 西部超导材料科技股份有限公司 | Method for measuring copper-to-over ratio of WIC (wire in wire) inlaid superconducting wire by mass-resistance method |
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