Device, system and method for testing critical current of double-sided high-temperature superconducting strip

Abstract

The invention relates to the technical field of critical current testing of superconducting tapes, in particular to a critical current testing device, system and method for a double-sided high-temperature superconducting tape. A critical current testing device for a double-sided high-temperature superconducting tape comprises a low-temperature box body which is provided with an accommodating space, the accommodating space is internally provided with an unwinding roller and a winding roller, the unwinding roller and the winding roller are respectively suitable for winding the double-sided high-temperature superconducting tape to be tested, and the double-sided high-temperature superconducting tape to be tested is provided with a first surface and a second surface which are correspondingly arranged; the first measuring assembly is suitable for measuring critical current and voltage of the first surface of the to-be-measured double-sided high-temperature superconducting tape; and the second measuring assembly is suitable for measuring the critical current and voltage of the second surface of the to-be-measured double-sided high-temperature superconducting tape. The problem that when the double-sided superconducting tape is measured, the lead current of the YBCO1 superconducting layer does not pass through the resistance layer and cannot reach the YBCO2 superconducting layer, the quench of the voltage cannot be detected, and the measurement error of the critical current is caused is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting tape critical current testing, and in particular to a double-sided high-temperature superconducting tape critical current testing device, a testing system and a testing method. Background Art

[0002] In a single-layer superconducting tape structure, only one layer of YBCO (YBa2Cu3O7-δ) has superconductivity as the superconducting layer. There are resistors on both the upper and lower surfaces of the superconducting layer. In order to eliminate the measurement error caused by the resistance, the four-lead method is used. In the four-lead method measurement, the current given by the current source is Is, and the signal current measured by the voltage is Ig. Ig is very small and can be ignored. The current entering the superconducting layer is Is-Ig. The four-lead method can eliminate the measurement error caused by the surface resistance R1~R4 of the tape through this measurement method. The current applied by the current source and the current collected by the voltage are at the same position, the YBCO layer.

[0003] Double-sided superconducting tape has two superconducting layers (YBCO1 and YBCO2), with a resistor layer between the two superconducting layers, and a resistor on the surface packaging layer. When the current Is given by the current source is flowing through the YBCO1 superconducting layer, the signal current measured by the voltage is flowing through the YBCO2 superconducting layer. The currents of the current source and the voltage source are not in the same position, which will cause errors in the numerical measurement method of voltage and current, and thus affect the accuracy of the test results. If the current does not pass through the resistor layer between the two superconducting layers before the YBCO1 superconducting layer quenches and cannot reach the YBCO2 superconducting layer, the voltage will not detect the quench, which will cause errors in the critical current measurement. Summary of the invention

[0004] In view of this, the present invention provides a double-sided high-temperature superconducting tape critical current testing device, testing system and testing method to solve the problem that when measuring the double-sided superconducting tape, the current does not pass through the resistance layer before the YBCO1 superconducting layer quenches and cannot reach the YBCO2 superconducting layer, and the voltage cannot detect the quench, thereby causing critical current measurement errors.

[0005] In a first aspect, the present invention provides a double-sided high-temperature superconducting tape critical current testing device, comprising:

[0006] A low temperature box, wherein the low temperature box has a containing space, wherein an unwinding roller and a winding roller are arranged in the containing space, wherein the unwinding roller and the winding roller are respectively suitable for winding a double-sided high temperature superconducting tape to be tested;

[0007] A first measuring component, disposed in the low temperature box, the first measuring component being suitable for measuring the current and voltage of the first surface of the double-sided high temperature superconducting tape to be measured;

[0008] The second measuring component is arranged in the low temperature box, and the second measuring component is suitable for measuring the current and voltage of the second surface of the double-sided high temperature superconducting tape to be measured.

[0009] A first measuring component is arranged on the first surface of the double-sided high-temperature superconducting tape to be tested, and a second measuring component is arranged on the second surface, and the critical current and voltage of the first surface and the critical current and voltage of the second surface are measured respectively. The values ​​of the two surfaces are mutually verified to ensure that the measured critical current does not quench prematurely and cause a misjudgment of quench.

[0010] In some embodiments, the first measuring component includes a first current source electrode wheel and a second current source electrode wheel, the first current source electrode wheel and the second current source electrode wheel are suitable for respectively contacting the first surface of the double-sided high-temperature superconducting tape to be measured, and the first current source electrode wheel and the second current source electrode wheel are respectively connected to the ammeter through lines.

[0011] In some embodiments, the first measurement component includes a first voltage measuring electrode wheel and a second voltage measuring electrode wheel, the first voltage measuring electrode wheel and the second voltage measuring electrode wheel are suitable for respectively contacting the first surface of the double-sided high-temperature superconducting tape to be measured, and the first voltage measuring electrode wheel and the second voltage measuring electrode wheel are respectively connected to a voltmeter through lines.

[0012] In some embodiments, the first voltage measuring electrode wheel and the second voltage measuring electrode wheel are respectively disposed between the first current source electrode wheel and the second current source electrode wheel, and the first current source electrode wheel, the second current source electrode wheel, the first voltage measuring electrode wheel, and the second voltage measuring electrode wheel are all arranged at the same height.

[0013] In some embodiments, the second measurement component includes a third current source electrode wheel and a fourth current source electrode wheel, the third current source electrode wheel and the fourth current source electrode wheel are suitable for respectively contacting the second surface of the double-sided high-temperature superconducting tape to be measured, the third current source electrode wheel and the fourth current source electrode wheel are respectively connected to the ammeter through lines, the third current source electrode wheel is arranged between the first current source electrode wheel and the first voltage measurement electrode wheel, the fourth current source electrode wheel is arranged between the second voltage measurement electrode wheel and the second current source electrode wheel, and the heights of the third current source electrode wheel and the fourth current source electrode wheel are both higher than the first current source electrode wheel.

[0014] In some embodiments, the second measurement component includes a third voltage measuring electrode wheel and a fourth voltage measuring electrode wheel, the third voltage measuring electrode wheel and the fourth voltage measuring electrode wheel are suitable for respectively contacting the second surface of the double-sided high-temperature superconducting tape to be measured, the third voltage measuring electrode wheel and the fourth voltage measuring electrode wheel are respectively connected to the voltmeter through lines, the third voltage measuring electrode wheel and the fourth voltage measuring electrode wheel are both arranged between the first voltage measuring electrode wheel and the second voltage measuring electrode wheel, and the heights of the third voltage measuring electrode wheel and the fourth voltage measuring electrode wheel are both higher than the first voltage measuring electrode wheel.

[0015] In a second aspect, the present invention further provides a double-sided high-temperature superconducting tape critical current testing system, comprising the above-mentioned double-sided high-temperature superconducting tape critical current testing device.

[0016] In some embodiments, a cooling device is also included, which includes a cooling pipeline, a low-temperature fan, a liquid nitrogen heat exchanger and a refrigerator heat exchanger. The cooling pipeline is provided with a low-temperature fan, a liquid nitrogen heat exchanger and a refrigerator heat exchanger. The cooling inlet and the cooling outlet of the cooling pipeline are respectively arranged on both sides of the low-temperature box.

[0017] In some embodiments, helium is suitable for flowing in the cooling pipeline, the low-temperature fan provides power for the helium, the refrigerator heat exchanger is provided with a low-temperature refrigerator and a refrigeration box, the low-temperature refrigerator is connected to the refrigeration column of the refrigeration box, and a heating wire is provided at the cold air outlet of the refrigeration box.

[0018] In a third aspect, the present invention also provides a testing method for a double-sided high-temperature superconducting tape critical current testing device, wherein the double-sided high-temperature superconducting tape to be tested moves from a unwinding roller toward a winding roller, and a first measuring component measures the critical current and voltage of the first surface, and a second measuring component measures the critical current and voltage of the second surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a double-sided high-temperature superconducting tape critical current testing system according to an embodiment of the present invention;

[0021] Figure 2It is a schematic diagram of the first temperature measuring assembly, the second temperature measuring assembly, the double-sided high-temperature superconducting tape to be measured and the position of the guide wheel in the low-temperature box according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a liquid nitrogen heat exchanger according to an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a refrigerator heat exchanger according to an embodiment of the present invention;

[0024] Figure 5 This is a test principle diagram of a double-sided high-temperature superconducting tape to be tested according to an embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the connection between the first current source electrode wheel, the second current source electrode wheel, the third current source electrode wheel, the fourth current source electrode wheel and a data collector according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection between the first voltage measuring electrode wheel, the second voltage measuring electrode wheel, the third voltage measuring electrode wheel, the fourth voltage measuring electrode wheel and a data collector according to an embodiment of the present invention.

[0027] Description of reference numerals: 1. low temperature box; 101. unwinding roller; 102. winding roller; 103. current and voltage display screen; 104. guide wheel; 105. meter wheel; 106. length display screen; 107. data acquisition device; 108. vacuum port; 109. auxiliary wheel; 2. first measuring component; 201. first current source electrode wheel; 202. second current source electrode wheel; 203. first voltage measurement electrode wheel; 204. second voltage measurement electrode wheel; 3. second measuring component; 301. third current source electrode wheel; 302. fourth current source electrode wheel; 303. third voltage measurement electrode wheel; 304. fourth voltage measurement electrode wheel; 4. Cooling device; 401. Cooling pipeline; 402. Cryogenic fan; 403. Liquid nitrogen heat exchanger; 4031. Liquid nitrogen heat exchange shell; 4032. Liquid nitrogen outlet; 4033. Liquid nitrogen inlet; 404. Refrigeration machine heat exchanger; 4041. Cryogenic refrigerator; 4042. Refrigeration box; 4043. Refrigeration column; 4044. Heating wire; 4045. Cold air outlet; 5. Double-sided high-temperature superconducting tape to be tested; 501. First surface; 502. Second surface; 503. First packaging layer; 504. Second packaging layer; 505. First superconducting layer; 506. Second superconducting layer; 507. Baseband layer; 6. Ammeter; 7. Voltmeter; 8. Switch. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-6 As shown, the double-sided high-temperature superconducting tape critical current testing device provided in this embodiment mainly includes a low-temperature box 1, and a first measuring component 2 and a second measuring component 3 arranged in the low-temperature box 1.

[0030] Specifically, the low-temperature box 1 has a accommodating space, in which a reel 101 and a reel 102 are provided, the reel 101 and the reel 102 are respectively suitable for winding a double-sided high-temperature superconducting tape 5 to be tested, and the double-sided high-temperature superconducting tape 5 to be tested has a first surface 501 and a second surface 502 arranged correspondingly; a first measuring component 2 is arranged in the low-temperature box 1, and the first measuring component 2 is suitable for measuring the critical current and voltage of the first surface 501 of the double-sided high-temperature superconducting tape 5 to be tested; a second measuring component 3 is arranged in the low-temperature box 1, and the second measuring component 3 is suitable for measuring the critical current and voltage of the second surface 502 of the double-sided high-temperature superconducting tape 5 to be tested.

[0031] In this embodiment, a first measuring component 2 is arranged on the first surface 501 of the double-sided high-temperature superconducting tape 5 to be tested, and a second measuring component 3 is arranged on the second surface 502, and the critical current and voltage of the first surface 501 and the critical current and voltage of the second surface 502 are measured respectively, and the values ​​of the two surfaces are mutually verified to ensure that the measured critical current does not quench in advance and cause a misjudgment of quench. Even if the current does not pass through the resistance layer and cannot reach the YBCO2 superconducting layer before the YBCO1 superconducting layer quenches, the values ​​measured by the first surface 501 and the second surface 502 are compared, thereby avoiding the problem of incorrect critical current measurement.

[0032] like Figure 5 As shown, the double-sided high-temperature superconducting tape 5 to be tested in the present application is sequentially arranged from top to bottom along the height direction as a first packaging layer 503, a first superconducting layer 505, a base tape layer 507, a second superconducting layer 506, and a second packaging layer 504, wherein the first packaging layer 503 has a first surface 501, and the second packaging layer 504 has a second surface 502, wherein the first packaging layer 503, the base tape layer 507, and the second packaging layer 504 all have resistance. Specifically, the first surface 501 is the upper surface, the second surface 502 is the lower surface, and the base tape layer 507 has a relatively large resistance.

[0033] like Figure 1, Figure 2 and Figure 5 As shown, in some embodiments, the first measuring component 2 includes a first current source electrode wheel 201 and a second current source electrode wheel 202, and the first current source electrode wheel 201 and the second current source electrode wheel 202 are suitable for respectively contacting the first surface 501 of the double-sided high-temperature superconducting tape 5 to be measured, and the first current source electrode wheel 201 and the second current source electrode wheel 202 are respectively connected to the ammeter 6 through lines.

[0034] In this embodiment, the first current source electrode wheel 201 and the second current source electrode wheel 202 serve as the positive and negative electrodes of the current source contacting the first surface 501 of the double-sided high-temperature superconducting tape 5 to be tested, and are then connected to the ammeter 6 through a line, thereby forming a Figure 5 The measuring circuit shown is used to measure the current value of the first surface 501.

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the first measuring component 2 includes a first voltage measuring electrode wheel 203 and a second voltage measuring electrode wheel 204, and the first voltage measuring electrode wheel 203 and the second voltage measuring electrode wheel 204 are suitable for respectively contacting the first surface 501 of the double-sided high-temperature superconducting tape 5 to be measured, and the first voltage measuring electrode wheel 203 and the second voltage measuring electrode wheel 204 are respectively connected to the voltmeter 7 through lines.

[0036] In this embodiment, the first voltage measuring electrode wheel 203 and the second voltage measuring electrode wheel 204 serve as the positive and negative electrodes of the power source contacting the first surface 501 of the double-sided high-temperature superconducting tape 5 to be measured, and are then connected to the voltmeter 7 through a line, thereby forming a Figure 5 The measuring circuit shown is used to measure the voltage value of the first surface 501.

[0037] like Figure 1 , Figure 2 As shown, in some embodiments, a first voltage measuring electrode wheel 203 and a second voltage measuring electrode wheel 204 are respectively provided between the first current source electrode wheel 201 and the second current source electrode wheel 202, and the first current source electrode wheel 201, the second current source electrode wheel 202, the first voltage measuring electrode wheel 203, and the second voltage measuring electrode wheel 204 are all arranged at the same height.

[0038] In this embodiment, the positions of the current source electrode wheel and the voltage measurement electrode wheel are set to form a circuit for measuring current and voltage. The first current source electrode wheel 201, the second current source electrode wheel 202, the first voltage measurement electrode wheel 203, and the second voltage measurement electrode wheel 204 are all set at the same height to ensure that the electrode wheels of the first measurement component 2 are in contact with the first surface 501 of the double-sided high-temperature superconducting tape 5 to be measured.

[0039] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the second measuring component 3 includes a third current source electrode wheel 301 and a fourth current source electrode wheel 302, and the third current source electrode wheel 301 and the fourth current source electrode wheel 302 are suitable for respectively contacting the second surface 502 of the double-sided high-temperature superconducting tape 5 to be measured, and the third current source electrode wheel 301 and the fourth current source electrode wheel 302 are respectively connected to the ammeter 6 through lines, and the third current source electrode wheel 301 is arranged between the first current source electrode wheel 201 and the first voltage measuring electrode wheel 203, and the fourth current source electrode wheel 302 is arranged between the second voltage measuring electrode wheel and the second current source electrode wheel 202, and the heights of the third current source electrode wheel 301 and the fourth current source electrode wheel 302 are both higher than the first current source electrode wheel 201.

[0040] In this embodiment, the third current source electrode wheel 301 and the fourth current source electrode wheel 302 serve as the positive and negative electrodes of the current source contacting the second surface 502 of the double-sided high-temperature superconducting tape 5 to be tested, and are then connected to the ammeter 6 through a line, thereby forming a Figure 5 The measuring circuit shown is used to measure the current value of the second surface 502. The heights of the third current source electrode wheel 301 and the fourth current source electrode wheel 302 are both higher than the first current source electrode wheel 201, so that the third current source electrode wheel 301 and the fourth current source electrode wheel 302 can contact the second surface 502 of the double-sided high-temperature superconducting tape 5 to be measured.

[0041] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the second measurement component 3 includes a third voltage measurement electrode wheel 303 and a fourth voltage measurement electrode wheel 304, the third voltage measurement electrode wheel 303 and the fourth voltage measurement electrode wheel 304 are suitable for respectively contacting the second surface 502 of the double-sided high-temperature superconducting tape 5 to be measured, the third voltage measurement electrode wheel 303 and the fourth voltage measurement electrode wheel 304 are respectively connected to the voltmeter 7 through lines, the third voltage measurement electrode wheel 303 and the fourth voltage measurement electrode wheel 304 are both arranged between the first voltage measurement electrode wheel 203 and the second voltage measurement electrode wheel 204, and the heights of the third voltage measurement electrode wheel 303 and the fourth voltage measurement electrode wheel 304 are both higher than the first voltage measurement electrode wheel 203.

[0042] In this embodiment, the third voltage measuring electrode wheel 303 and the fourth voltage measuring electrode wheel 304 serve as the positive and negative electrodes of the power source contacting the second surface 502 of the double-sided high-temperature superconducting tape 5 to be tested, and are then connected to the voltmeter 7 through a line, thereby forming a Figure 5The measuring circuit shown is used to measure the voltage value of the second surface 502. The height of the third voltage measuring electrode wheel 303 and the fourth voltage measuring electrode wheel 304 are both higher than the first voltage measuring electrode wheel 203 to ensure contact with the second surface 502. In the present application, the measuring electrode wheel is connected to the ammeter 6 or the voltmeter 7, and each line is provided with a switch 8, which controls the opening and closing of the line.

[0043] like Figure 1 , Figure 2 As shown, in some embodiments, a guide wheel 104 is further included. The guide wheel 104 is arranged between the third voltage measurement electrode wheel 303 and the fourth voltage measurement electrode wheel 304, and the height of the guide wheel 104 is set at the same height as the first current source electrode wheel 201. The guide wheel 104 plays a guiding role. It should be noted that the third current source electrode wheel 301, the fourth current source electrode wheel 302, the third voltage measurement electrode wheel 303 and the fourth voltage measurement electrode wheel 304 are arranged at the same height. Figure 1 , Figure 2 As shown, it also includes a meter wheel 105 and an auxiliary wheel 109. The meter wheel 105 is used to calculate the length of the double-sided high-temperature superconducting tape 5 to be tested. The double-sided high-temperature superconducting tape 5 to be tested extending from the unwinding roller 101 contacts the first current source electrode wheel 201 after passing through the meter wheel 105. The double-sided high-temperature superconducting tape 5 to be tested extending from the second current source electrode wheel 202 reaches the winding roller 102 after passing through the auxiliary wheel 109. The movement direction of the double-sided high-temperature superconducting tape to be tested is from the unwinding roller 101 to the winding roller 102, and passes through the first current source electrode wheel 201, the third current source electrode wheel 301, the first voltage measurement electrode wheel 203, the third voltage measurement electrode wheel 303, the guide wheel 104, the fourth voltage measurement electrode wheel 304, the second voltage measurement electrode wheel 204, the fourth current source electrode wheel 302, and the second current source electrode wheel 202 in sequence.

[0044] like Figure 1 , Figure 6 and Figure 7 As shown, in some embodiments, the low temperature box 1 is further provided with a current and voltage display screen 103, a length display screen 106 and a data collector 107, wherein the data collector 107 collects the values ​​of the ammeter 6 and the voltmeter 7 respectively, and displays them on the current and voltage display screen 103, and the meter wheel 105 displays the measured length of the double-sided high-temperature superconducting tape 5 to be measured on the length display screen 106. Figure 1As shown, a vacuum port 108 is also provided on the side of the cryogenic box 1, and the vacuum port 108 is connected to the vacuum pump. In order to drive the winding roller 102 to rotate, a power piece is also included, and the power piece is connected to the winding roller 102 to drive the winding roller 102 to rotate. In this application, only pure helium can be used in the measurement environment. If mixed with air, the air will condense into frost at low temperatures, thereby affecting the measurement accuracy. Before the double-sided high-temperature superconducting tape 5 to be tested is ready to be cooled, a vacuum pump is required to evacuate the cryogenic box 1 through the vacuum port 108, and then inject pure helium.

[0045] According to an embodiment of the present invention, on the other hand, a double-sided high-temperature superconducting tape critical current testing system is provided, comprising the above-mentioned double-sided high-temperature superconducting tape critical current testing device, and also comprising a cooling device 4 .

[0046] like Figure 1 As shown, the cooling device 4 includes a cooling pipeline 401, a low-temperature fan 402, a liquid nitrogen heat exchanger 403 and a refrigerator heat exchanger 404. The cooling pipeline 401 is provided with a low-temperature fan 402, a liquid nitrogen heat exchanger 403 and a refrigerator heat exchanger 404. The cooling inlet and the cooling outlet of the cooling pipeline 401 are respectively arranged on both sides of the low-temperature box 1.

[0047] In this embodiment, the liquid nitrogen heat exchanger 403 cools the gas in the cooling pipeline 401, and the refrigerator heat exchanger 404 further controls the temperature of the gas in the cooling pipeline 401, so that the temperature of the gas flowing from the refrigerator heat exchanger 404 into the low-temperature box 1 remains stable. The cooling inlet and the cooling outlet of the cooling pipeline 401 are respectively arranged on both sides of the low-temperature box 1, so that the cooling gas in the cooling pipeline 401 fills the entire low-temperature box 1.

[0048] like Figure 1 , Figure 4 As shown, the cooling pipeline 401 is suitable for helium to flow, the low-temperature fan 402 provides power for the flow of helium, the refrigerator heat exchanger 404 is provided with a low-temperature refrigerator 4041 and a refrigeration box 4042, the low-temperature refrigerator 4041 is connected to the refrigeration column 4043 of the refrigeration box 4042, and a heating wire 4044 is provided at the cold air outlet 4045 of the refrigeration box 4042.

[0049] In this embodiment, helium is an inert gas, which ensures the safety of the entire cooling pipeline 401 and the low-temperature box 1. The low-temperature refrigerator 4041 is connected to the refrigeration column 4043 of the refrigeration box 4042. Through the cooperation of the refrigeration column 4043 and the heating wire 4044, the temperature at the cold air outlet 4045 of the refrigeration box 4042 can be adjusted, thereby ensuring that the temperature of the gas entering the low-temperature box 1 remains stable.

[0050] like Figure 3As shown, the liquid nitrogen heat exchanger 403 is provided with a liquid nitrogen heat exchange shell 4031, and the cooling pipeline 401 is arranged in a serpentine shape inside the liquid nitrogen heat exchange shell 4031. A liquid nitrogen inlet 4033 and a liquid nitrogen outlet 4032 are provided on the side wall of the liquid nitrogen heat exchange shell 4031. The liquid nitrogen inlet 4033 is suitable for passing liquid nitrogen to exchange heat with the cooling gas in the cooling pipeline 401, thereby reducing the temperature of the cooling gas.

[0051] In order to realize automatic control, a controller is also included, which is respectively connected to the power parts, meter wheel 105, data collector 107, length display screen 106, current and voltage display screen 103, low temperature fan 402, low temperature refrigerator 4041 and other circuits.

[0052] A testing method for a double-sided high-temperature superconducting tape critical current testing device comprises the following steps:

[0053] 1) The vacuum pump extracts air from the cryogenic box 1 through the vacuum port 108. After the air is completely extracted, pure helium is injected into the cryogenic box 1. The cryogenic fan 402 rotates to drive the helium in the cooling pipeline 401 to circulate, so that the temperature in the cryogenic box 1 is higher than or equal to 77K;

[0054] 2) When the temperature in the cryogenic box 1 needs to be lower than 77K, liquid nitrogen is filled into the liquid nitrogen inlet 4033 so that the temperature of the helium after flowing out of the liquid nitrogen heat exchanger 403 of the cooling pipeline 401 is a certain temperature (lower than 77K). When the helium entering the refrigerator heat exchanger 404 needs to be further cooled, the cryogenic refrigerator 4041 is started so that the refrigeration column 4043 further cools the helium in the refrigeration box 4042;

[0055] 3) When it is necessary to heat the helium gas entering the refrigerator heat exchanger 404, the temperature of the helium gas at the cold air outlet 4045 is increased by the heating wire 4044, so that the temperature of the helium gas at the cold air outlet 4045 is at a certain temperature within the range of "20K-77K", thereby measuring the critical current value of the superconducting tape in the low temperature box 1 at this temperature;

[0056] 4) The above steps enable the temperature in the low-temperature box 1 to reach the test temperature. During the measurement process, the power part is started, and the winding roller 102 is wound, so that the double-sided high-temperature superconducting tape 5 to be tested moves from the unwinding roller 101 to the winding roller 102, and passes through the meter wheel 105, the first current source electrode wheel 201, the third current source electrode wheel 301, the first voltage measurement electrode wheel 203, the third voltage measurement electrode wheel 303, the guide wheel 104, the fourth voltage measurement electrode wheel 304, the second voltage measurement electrode wheel 204, the fourth current source electrode wheel 302, the second current source electrode wheel 202, and the auxiliary wheel 109 in sequence, and finally reaches the winding wheel. At the same time, the meter wheel 105 feeds back the signal to the controller, which is then displayed on the length display screen 106 by the controller. After the winding roller 102 rotates a certain distance and stops, the critical voltage and critical current at a certain temperature are measured. When the first When the current and voltage of the surface 501 are measured, the switch 8 on the first surface 501 circuit connected to the ammeter 6 and the voltmeter 7 is opened, and the switch 8 on the second surface 502 circuit connected to the ammeter 6 and the voltmeter 7 is closed to carry out the test; when the current and voltage of the second surface 502 need to be tested, the switch 8 on the second surface 502 circuit connected to the ammeter 6 and the voltmeter 7 is opened, and the switch 8 on the first surface 501 circuit connected to the ammeter 6 and the voltmeter 7 is closed to carry out the test. After the test is completed, the winding roller 102 rotates a distance again to start the next measurement. The ammeter 6 and the voltmeter 7 respectively transmit the signal to the data acquisition device 107, which is fed back to the controller by the data acquisition device 107, and then displayed on the current and voltage display screen 103 by the controller, so that the on-site personnel can observe the data of the first measurement component 2 and the second measurement component 3 on-site, and cross-check and verify the data.

[0057] It should be noted that the measured temperature in step 4) refers to any temperature value in the range of "20K-77K".

[0058] The double-sided high-temperature superconducting tape critical current test device, test system and test method provided in the present application have the following advantages: (1) by setting a first measuring component 2 and a second measuring component 3, the critical current and voltage of the first surface 501 and the critical current and voltage of the second surface 502 are measured respectively, and the values ​​of the two surfaces are mutually verified to ensure that the measured critical current does not quench prematurely and cause quench misjudgment; (2) the temperature in the low-temperature box 1 can be at any temperature value in the range of "20K-77K", and the critical current of the double-sided high-temperature superconducting tape at any temperature value of "20K-77K" can be measured, and the measurement range is wider.

[0059] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A double-sided high-temperature superconducting tape critical current test device, characterized in that: include: A low temperature box (1), the low temperature box (1) having a storage space, wherein a reel (101) and a reel (102) are arranged in the storage space, the reel (101) and the reel (102) being respectively suitable for winding a double-sided high temperature superconducting tape (5) to be tested, the double-sided high temperature superconducting tape (5) to be tested having a first surface (501) and a second surface (502) arranged correspondingly; A first measuring component (2) is arranged in the low temperature box (1), and the first measuring component (2) is suitable for measuring the critical current and voltage of the first surface (501) of the double-sided high temperature superconducting tape (5) to be measured; The second measuring component (3) is arranged in the low temperature box (1), and the second measuring component (3) is suitable for measuring the critical current and voltage of the second surface (502) of the double-sided high temperature superconducting tape (5) to be measured.

2. The double-sided high-temperature superconducting tape critical current testing device according to claim 1, characterized in that: The first measuring component (2) comprises a first current source electrode wheel (201) and a second current source electrode wheel (202), the first current source electrode wheel (201) and the second current source electrode wheel (202) being adapted to respectively contact with a first surface (501) of the double-sided high-temperature superconducting tape (5) to be measured, and the first current source electrode wheel (201) and the second current source electrode wheel (202) being respectively connected to an ammeter (6) via a line.

3. The double-sided high-temperature superconducting tape critical current testing device according to claim 2, characterized in that: The first measurement component (2) comprises a first voltage measurement electrode wheel (203) and a second voltage measurement electrode wheel (204); the first voltage measurement electrode wheel (203) and the second voltage measurement electrode wheel (204) are respectively adapted to contact with a first surface (501) of the double-sided high-temperature superconducting tape (5) to be measured; the first voltage measurement electrode wheel (203) and the second voltage measurement electrode wheel (204) are respectively connected to a voltmeter (7) via lines.

4. The double-sided high-temperature superconducting tape critical current testing device according to claim 3, characterized in that: The first voltage measurement electrode wheel (203) and the second voltage measurement electrode wheel (204) are respectively arranged between the first current source electrode wheel (201) and the second current source electrode wheel (202); the first current source electrode wheel (201), the second current source electrode wheel (202), the first voltage measurement electrode wheel (203), and the second voltage measurement electrode wheel (204) are all arranged at the same height.

5. The double-sided high-temperature superconducting tape critical current testing device according to claim 3, characterized in that: The second measuring component (3) comprises a third current source electrode wheel (301) and a fourth current source electrode wheel (302), the third current source electrode wheel (301) and the fourth current source electrode wheel (302) being adapted to respectively contact the second surface (502) of the double-sided high-temperature superconducting tape (5) to be measured, the third current source electrode wheel (301) and the fourth current source electrode wheel (302) being respectively connected to an ammeter (6) via lines, the third current source electrode wheel (301) being arranged between the first current source electrode wheel (201) and the first voltage measuring electrode wheel (203), the fourth current source electrode wheel (302) being arranged between the second voltage measuring electrode wheel and the second current source electrode wheel (202), the third current source electrode wheel (301) and the fourth current source electrode wheel (302) both being higher than the first current source electrode wheel (201).

6. The double-sided high-temperature superconducting tape critical current testing device according to claim 5, characterized in that: The second measurement assembly (3) comprises a third voltage measurement electrode wheel (303) and a fourth voltage measurement electrode wheel (304), the third voltage measurement electrode wheel (303) and the fourth voltage measurement electrode wheel (304) being adapted to respectively contact the second surface (502) of the double-sided high-temperature superconducting tape (5) to be measured, the third voltage measurement electrode wheel (303) and the fourth voltage measurement electrode wheel (304) being respectively connected to a voltmeter (7) via a line, the third voltage measurement electrode wheel (303) and the fourth voltage measurement electrode wheel (304) being both arranged between the first voltage measurement electrode wheel (203) and the second voltage measurement electrode wheel (204), and the heights of the third voltage measurement electrode wheel (303) and the fourth voltage measurement electrode wheel (304) being both higher than the first voltage measurement electrode wheel (203).

7. A double-sided high-temperature superconducting tape critical current test system, characterized in that: A double-sided high-temperature superconducting tape critical current testing device comprising the device described in any one of claims 1-6.

8. The double-sided high-temperature superconducting tape critical current testing system according to claim 7, characterized in that: The invention also comprises a cooling device (4), wherein the cooling device (4) comprises a cooling pipeline (401), a low-temperature fan (402), a liquid nitrogen heat exchanger (403) and a refrigerator heat exchanger (404); the cooling pipeline (401) is provided with the low-temperature fan (402), the liquid nitrogen heat exchanger (403) and the refrigerator heat exchanger (404); and the cooling inlet and the cooling outlet of the cooling pipeline (401) are respectively arranged on two sides of the low-temperature box (1).

9. The double-sided high-temperature superconducting tape critical current testing system according to claim 8, characterized in that: The cooling pipeline (401) is suitable for helium to flow, the low-temperature fan (402) provides power for the helium, the refrigerator heat exchanger (404) is provided with a low-temperature refrigerator (4041) and a refrigeration box (4042), the low-temperature refrigerator (4041) is connected to the refrigeration column (4043) of the refrigeration box (4042), and a heating wire (4044) is provided at the cold air outlet (4045) of the refrigeration box (4042).

10. A method for testing a double-sided high-temperature superconducting tape critical current testing device, used for using the double-sided high-temperature superconducting tape critical current testing device according to claim 1, characterized in that: The double-sided high-temperature superconducting tape (5) to be measured moves from an unwinding roller (101) toward a winding roller (102), a first measuring component (2) measures the critical current and voltage of a first surface (501), and a second measuring component (3) measures the critical current and voltage of a second surface (502).

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