Superconducting strip critical current anisotropy test sample rod

Abstract

The invention belongs to the field of superconducting material measurement, and discloses a sample rod for testing the anisotropy of a critical current of a superconducting strip. The sample rod comprises a mechanical transmission device, a sample mounting platform, a Hall sensor and an electric signal transmission device, the mechanical transmission device comprises a worm and worm wheel transmission set, a straight gear set and a transmission shaft, and the transmission shaft is vertically connected between a worm wheel and the straight gear set. The sample mounting platform comprises a sample table and a copper current terminal, the sample table is arranged in the middle of the copper current terminal, and the copper current terminal is fixedly connected with the straight gear set; the Hall sensor is arranged on the back of the sample table and electrically connected with the electric signal transmission device. According to the invention, the sample mounting platform is driven to complete continuous rotation based on a dual transmission mechanism of the worm and worm gear transmission group and the straight gear group, and meanwhile, the Hall sensor is combined to realize critical current measurement of the superconducting tape under low-temperature, large-current, different-size and angle magnetic fields.

Description

Technical Field

[0001] The present invention belongs to the technical field of superconducting material measurement, and more specifically, relates to a test sample rod for measuring the critical current anisotropy of a superconducting tape. Background Art

[0002] High-temperature superconductors usually present a laminated structure of superconducting copper oxide and non-conductive layers. This unique layered structure results in different values of the coherence length (ξ) and penetration depth (λ) in different directions; in addition, the layered structure of high-temperature superconductors and the weak connection effect between high-temperature superconducting grains further exacerbate the anisotropic characteristics of the material, making the electromagnetic properties of high-temperature superconductors highly complex. Specifically, in terms of macroscopic electromagnetic properties, the superconducting tape exhibits different critical current characteristics under magnetic fields with different amplitudes and angles. Therefore, the study of the anisotropy of the critical current characteristics of high-temperature superconductors is very important for the practical applications of high-temperature superconductors, such as providing theoretical guidance and data support for magnet design.

[0003] Among the sample rods reported and put into use currently, those that can change the angle of the tape under a magnetic field often have the following problems: The first type of sample rod welds the tape to the sample rod and changes the angle between the tape and the magnetic field by directly rotating the sample rod with the welded tape. The mechanical structure of this sample rod is too simple, and it is applicable to split magnets that can provide a horizontal magnetic field with a relatively high cost. It cannot convert the vertical power input into horizontal rotation and cannot meet the requirements of experiments in a vertical magnetic field. The second type of sample rod changes the angle between the superconducting tape and the magnetic field by replacing the skeleton for fixing the superconducting tape with different shapes. This sample rod lacks a rotatable transmission device and can only measure the critical current of the superconducting tape at one magnetic field angle each time. If the angle needs to be changed, the sample rod needs to be lifted out of the cryostat, the tape needs to be welded and the skeleton needs to be installed, and then the cryogenic liquid needs to be re-introduced, which increases the test workload and also exacerbates the loss of liquid nitrogen or liquid helium. The third type of sample rod judges the magnetic field angle by observing the relative position of the mechanical dial and the pointer. This sample rod cannot arbitrarily adjust the angle between the superconducting tape and the magnetic field and cannot adjust to an angle within the scale accuracy. At the same time, the mechanical rotating structure with the welded tape is immersed in the cryogenic liquid, and there is a certain error between the actual angle between the tape and the magnetic field during rotation and the angle displayed by the mechanical dial at the room temperature end due to the temperature difference. Summary of the Invention

[0004] In view of the above deficiencies or improvement requirements of the prior art, the present invention provides a test sample rod for the critical current anisotropy of superconducting tapes, aiming to drive the sample mounting platform to complete continuous rotation based on the dual transmission mechanism of optimizing the worm and worm gear transmission group and the spur gear group in the mechanical transmission device, and at the same time, combining a Hall sensor to measure the anisotropy of the critical current of the superconducting tape in background magnetic fields of different magnitudes and angles, thereby solving the technical problem in the prior art that it is difficult to complete the high-precision measurement of the critical current of the superconducting tape at continuously rotating angles.

[0005] To achieve the above object, the present invention provides a test sample rod for the critical current anisotropy of superconducting tapes, including a mechanical transmission device, a sample mounting platform, a Hall sensor, and an electrical signal transmission device;

[0006] The mechanical transmission device includes a worm and worm gear transmission group, a spur gear group, and a transmission shaft. The worm and the worm gear in the worm and worm gear transmission group are meshed with each other. The worm is parallel to the spur gear group, and the transmission shaft is vertically connected between the worm gear and the spur gear group. The sample mounting platform includes a sample stage and copper current terminals. The sample stage is arranged in the middle part of the copper current terminals, and the copper current terminals are fixedly connected to the spur gear group. The Hall sensor is arranged on the back of the sample stage and is electrically connected to the electrical signal transmission device.

[0007] As a preference of the present invention, the mechanical transmission device further includes an angle adjustment knob and a connecting rod. One end of the connecting rod is fixedly connected to the angle adjustment knob, and the other end is connected to the worm in the worm and worm gear transmission group through internal threads.

[0008] As a preference of the present invention, the spur gear group is two pairs of spur gears symmetrically arranged with respect to the worm and worm gear transmission group. One pair is the first spur gear and the second spur gear meshed, and the other pair is the third spur gear and the fourth spur gear meshed. The first spur gear and the third spur gear are respectively connected to it through the transmission shafts fixed on both sides of the worm gear, and the second spur gear and the fourth spur gear are connected to the sample mounting platform through the copper current terminals.

[0009] As a preference of the present invention, the transmission ratio of the spur gear group is (3 - 6):1.

[0010] As a preference of the present invention, the sample mounting platform further includes a pressing plate for covering the superconducting tape to be tested welded to the copper current terminals at both ends and fixing the position with the sample stage.

[0011] As a preference of the present invention, the Hall sensor is arranged on the back of the sample stage and is parallel to the sample stage, so that it is parallel to the superconducting tape to be tested on the sample stage.

[0012] Preferably, the electrical signal transmission device includes an aviation plug, a first copper terminal, a first copper lead column, a second copper terminal, a second copper lead column, a first welding column, a second welding column, a silver-plated copper braid, and a twisted pair wire;

[0013] The upper end of the first copper lead column is connected to the first copper terminal, and the lower end is connected to the first welding column. The first welding column is welded to the side of the copper current terminal that does not cover the sample stage through a silver-plated copper braid; the upper end of the second copper lead column is connected to the second copper terminal, and the lower end is connected to the second welding column. The second welding column is welded to the other side of the copper current terminal that does not cover the sample stage through a silver-plated copper braid; one end of the twisted pair wire is connected to the Hall sensor through a current lead and a voltage lead, and is used to connect to the superconducting strip to be measured on the sample stage through the voltage lead, and the other end is connected to the aviation plug.

[0014] Preferably, the electrical signal transmission device further includes a gas return interface and a hollow pipe; the hollow pipe is connected to the gas return interface; the signal wire welding strip passes through the hollow pipe and is connected to the aviation plug.

[0015] Preferably, the silver-plated copper braid is welded to the copper current terminal with solder having a melting point of 180-200 °C.

[0016] Preferably, the sample stage is made of G10 material.

[0017] Generally speaking, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:

[0018] 1. The present invention drives the sample mounting stage to complete continuous rotation through the double transmission mechanism of the worm and worm gear transmission group and the spur gear group in the mechanical transmission device, and at the same time combines the Hall sensor to measure the anisotropy of the critical current of the superconducting strip in different magnitudes and angular background magnetic fields. Specifically, the transmission shaft fixed on the worm gear is connected to the spur gear group, and the spur gear group is connected to the sample mounting stage through the copper current terminal. During the test, the superconducting strip is welded to the horizontal sample stage connected to the worm gear, which can realize the continuous conversion of mechanical power from the vertical direction to the horizontal direction, meet the requirement of changing the angle of the strip in the vertical magnetic field, and can continuously change the angle between the superconducting strip and the magnetic field without removing the sample rod from the cryostat, simplifying the experimental process and reducing the consumption of liquid nitrogen and liquid helium; further, based on the Hall sensor, a more precise measurement of the angle between the superconducting strip and the magnetic field is carried out.

[0019] 2. Through the dual transmission mechanism of the worm gear and the spur gear set in the present invention, the rotation angle can reach 0-180° during the process of adjusting the angle of the strip, with stable and reliable transmission, and relatively high transmission efficiency and accuracy. Due to the mechanical self-locking property of the worm gear transmission group, only the worm 18 can drive the worm wheel 19 to rotate, and the worm wheel 19 cannot drive the worm 18 to move. Therefore, only by rotating the angle adjustment knob 1 to make the sample stage 21 reach the predetermined angle can the measurement of the critical current be carried out, without constantly fixing the knob, and the applicable rotation angle is 0-180°.

[0020] 3. In the present invention, the transmission ratio of the preferred spur gear set in the spur gear group is 3. When the worm wheel drives the spur gear to rotate through the transmission shaft, the other spur gear achieves a deceleration effect through the meshing relationship of the gears, and the angle can be adjusted more precisely.

[0021] 4. The Hall sensor in the present invention is located on the back of the sample stage, preferably parallel to the sample stage, so that it is parallel to the superconducting strip to be measured on the sample stage. The Hall sensor is parallel to the superconducting strip, and the angle between the Hall sensor and the magnetic field is equal to the angle between the superconducting strip and the magnetic field. That is, by reading the Hall voltage of the Hall sensor, the angle between the superconducting strip and the magnetic field can be calculated, and the rotation angle can be controlled steplessly without being limited by the accuracy of the angle scale, providing more selectable angles for the critical current anisotropy experiment of the superconducting strip. Based on the test sample rod of the present application, the test accuracy reaches 0.5°. Compared with the existing test sample rod, it not only realizes the ability to directly rotate and adjust the angle during the test, but also has higher test accuracy.

[0022] 5. The solder between the silver-plated copper braided tape and the copper current terminal in the present invention preferably uses ordinary solder 60Sn / 40Pb with a melting point of 180°C to reduce the heating temperature during the welding of the superconducting strip (the solder between the copper current terminal and the superconducting strip uses low-temperature solder 50Sn / 32Pb / 18Cd with a melting point of 145°C), which can effectively reduce the critical current degradation caused by the welding temperature, is applicable to different types of superconducting strips, and is convenient for disassembly and replacement of a new superconducting strip after the test.

[0023] 6. The pressing plate 20 in the present invention is made of G10 and is used to fix the welded superconducting strip to prevent the superconducting strip from being displaced and deformed by the Lorentz force in the magnetic field after passing through the current. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the test sample rod for the critical current anisotropy of the superconducting strip exemplified in the present invention;

[0025] Figure 2 It is a schematic diagram of the partial structure of the test sample rod for the critical current anisotropy of the superconducting strip exemplified in the present invention;

[0026] Figure 3Schematic diagram of the local structure of the superconducting tape critical current anisotropy test sample rod exemplified in the present invention;

[0027] Figure 4 In the present invention Figure 3 Schematic diagram of another perspective.

[0028] In all the drawings, the same reference numerals are used to represent the same elements or structures, where: 1 - Angle adjustment knob, 2 - Return air interface, 3 - Epoxy fixing plate, 4 - Hollow pipe, 5 - Copper current terminal, 6 - Aviation plug, 7 - First copper terminal, 8 - Cover plate, 9 - First copper lead post, 10 - Second copper terminal, 11 - Second copper lead post, 12 - First welding post, 13 - First spur gear, 14 - Second spur gear, 15 - Signal wire welding strip, 16 - Second welding post, 17 - Connecting rod, 18 - Worm, 19 - Worm gear, 20 - Pressure plate, 21 - Sample stage, 22 - Third spur gear, 23 - Fourth spur gear, 24 - Hall sensor, 25 - Transmission shaft. Detailed implementation manners

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] As Figures 1 to 4 shown, in this embodiment, a superconducting tape critical current anisotropy test sample rod includes a mechanical transmission device, a sample mounting platform, a Hall sensor, and an electrical signal transmission device; wherein, the mechanical transmission device includes a worm and worm gear transmission group, a spur gear group, and a transmission shaft. The worm and worm gear in the worm and worm gear transmission group mesh with each other. The worm is parallel to the spur gear group, and the transmission shaft is vertically connected between the worm gear and the spur gear group, so that the worm gear is parallel to the spur gear group and rotates in the same direction; the sample mounting platform includes a sample stage and a copper current terminal. The sample stage is arranged in the middle part of the copper current terminal, and the copper current terminal is connected to the spur gear group; and the Hall sensor is arranged on the back of the sample stage and is electrically connected to the electrical signal transmission device. Thus, based on the mutual coupling of the above mechanical transmission device, sample mounting platform, electrical signal transmission device, and Hall sensor, the sample stage is driven to continuously rotate to a specific angle under the dual transmission mechanism of the worm and worm gear transmission group and the spur gear group. At the same time, the measurement of the angle between the superconducting tape and the magnetic field is completed in combination with the Hall sensor, and the critical current measurement experiment of the superconducting tape under low temperature, large current, and magnetic fields of different magnitudes and angles is realized.

[0031] In some embodiment modes, such as Figures 2 to 4As shown, the mechanical transmission device includes an angle adjustment knob 1, a connecting rod 17, a transmission shaft 25, a worm 18, a worm gear 19, a first spur gear 13, a second spur gear 14, a third spur gear 22, and a fourth spur gear 23; the angle adjustment knob 1 is fixed to one end of the connecting rod 17, and the other end of the connecting rod 17 is threadedly connected to the worm 18; the worm 18 meshes with the worm gear 19, and the worm gear 19 is fixedly connected to the first spur gear 13 and the third spur gear 22 respectively through the transmission shafts 25 fixed on both sides. The transmission shaft 25 is vertically connected between the worm gear 19 of the worm and worm gear transmission group and the spur gear group. The worm gear 19 and the spur gear group are arranged in parallel, and the first spur gear 13 and the third spur gear 22 are symmetrically arranged on both sides of the worm gear 19; the first spur gear 13 meshes with the second spur gear 14, and the third spur gear 22 meshes with the fourth spur gear 23. The rotation directions of the worm gear 19 and the spur gear group are the same, enabling the continuous conversion of mechanical power from the vertical direction to the horizontal direction. The second spur gear 14 and the fourth spur gear 23 are vertically and fixedly connected through a copper current terminal 5, and the sample stage 21 is fixedly arranged on the copper current terminal 5. In the cooperation of the various structures of the above mechanical transmission device, by rotating the angle adjustment knob 1, the connecting rod 17 is driven to rotate. The other end of the connecting rod 17 drives the worm 18 to rotate. The worm gear 19 rotates due to meshing with the worm 18, and drives the first spur gear 13 and the third spur gear 22 to rotate, and drives the second spur gear 14 and the fourth spur gear 23 to rotate by the same angle, thereby driving the sample stage 21 to rotate. Due to the mechanical self-locking property of the worm and worm gear transmission group, only the worm 18 can drive the worm gear 19 to rotate, and the worm gear 19 cannot drive the worm 18 to move. Therefore, only by rotating the angle adjustment knob 1 to make the sample stage 21 reach the predetermined angle can the measurement of the critical current be carried out, without constantly fixing the knob. The applicable rotation angle is 0 - 180°.

[0032] In some embodiments, the transmission ratio of the spur gear group is (3 - 6):1. When the worm gear drives the spur gear to rotate through the transmission shaft, the other spur gear achieves a deceleration effect through the meshing relationship of the gears, more precisely adjusting the angle to ensure a fine adjustment accuracy of 0.5°. For example, the module of the worm gear 19 is 0.8, the number of teeth is 50, the transmission ratio of the spur gear group is 3:1, and when the worm gear rotates 3°, the sample stage rotates 1° through the spur gear group.

[0033] In some embodiments, such as Figure 3As shown, the sample mounting platform includes a copper current terminal 5 and a sample stage 21; the copper current terminal 5 is fixedly arranged between the second spur gear 14 and the fourth spur gear 23, the sample stage 21 is arranged on the copper current terminal 5, and the plane of the sample stage 21 for fixing the superconducting tape and the plane of the copper current terminal 5 for welding the superconducting tape are in the same plane to avoid stress concentration of the superconducting tape. At the same time, neither the sample stage 21 and the second spur gear 14 nor the sample stage 21 and the fourth spur gear 23 are covered by the sample stage 21, and the exposed part of the copper current terminal 5 is used for welding the superconducting tape and the silver-plated copper braid.

[0034] In some embodiments, the sample mounting platform further includes a pressing plate 20 for covering the superconducting tape welded to the copper current terminal 5 at both ends and fixing the position with the sample stage 21. Specifically, when measuring the tape, both ends of the superconducting tape are fixed to the copper current terminal 5 by soldering, and then the pressing plate 20 is used to fix the whole superconducting tape and the sample stage 21 to avoid displacement deformation of the superconducting tape due to the Lorentz force in the magnetic field after passing current.

[0035] In some embodiments, as Figures 2 to 4 shown, the electrical signal transmission device includes a return air interface 2, an aviation plug 6, a first copper terminal 7, a first copper lead column 9, a second copper terminal 10, a second copper lead column 11, a hollow pipe 4, a first welding column 12, a second welding column 16, a silver-plated copper braid, a signal wire welding strip 15 and a twisted pair; both the first copper terminal 7 and the second copper terminal 10 are treated with insulating paint and are insulated from the cover plate 8; the first copper lead column 9 and the second copper lead column 11 pass through the epoxy fixing plate 3 to keep the direction vertical, and their upper ends pass through the cover plate 8 and are respectively connected to the first copper terminal 7 and the second copper terminal 10, and their lower ends are respectively connected to the first welding column 12 and the second welding column 16; the first welding column 12 and the second welding column 16 are welded to the copper current terminal 5 through the silver-plated copper braid; the Hall sensor 24 is fixed on the back of the tape welding surface of the sample stage 21 by Kapton tape; the signal wire welding strip 15 is fixed on the sample stage 21; two current leads and two voltage leads of the Hall sensor 24 and two voltage leads of the superconducting tape are all welded to one end of the signal wire welding strip 15, and the other end of the signal wire welding strip 15 is welded to the twisted pair, and the twisted pair passes through the hollow pipe 4 and is connected to the aviation plug 6; the helium gas volatilized in the experiment passes through the hollow pipe 4 and is recovered through the helium recovery pipe connected to the return air interface 2; the first copper terminal 7 and the second copper terminal 10 are externally connected to a DC current source for applying current to the superconducting tape; an external digital source meter and a nanovoltmeter are connected to the aviation plug 6 for passing a working current to the Hall sensor 24 and measuring the voltage of the superconducting tape and the voltage of the Hall sensor 24.

[0036] In some embodiments, the solder between the copper current terminal 5 and the superconducting tape is a low-temperature solder 50Sn / 32Pb / 18Cd with a melting point of 145 °C, while the solder between the silver-plated copper braid and the copper current terminal 5 is a solder with a melting point of 180 - 200 °C. For example, a common solder 60Sn / 40Pb with a melting point of 180 °C is selected to reduce the heating temperature during the welding of the superconducting tape, minimize the degradation of the critical current of the superconducting tape caused by welding, and at the same time prevent the silver-plated copper braid from falling off due to heat during the replacement of the superconducting tape.

[0037] In some embodiments, the Hall sensor is located on the back of the sample stage and is parallel to the sample stage, so that it is parallel to the superconducting tape to be measured on the sample stage. The Hall sensor 24 generates a Hall voltage in the magnetic field, and the value is proportional to the perpendicular component magnetic field passing through the Hall sensor 24. When the angle between the Hall sensor 24 and the magnetic field changes, the Hall voltage also changes accordingly. By measuring the Hall voltage of the Hall sensor 24 in the external magnetic field, the angle is calculated inversely. The Hall sensor is parallel to the superconducting tape, that is, the angle between the Hall sensor and the magnetic field is equal to the angle between the superconducting tape and the magnetic field.

[0038] In some embodiments, the sample stage 21 is made of G10 material, and its thermal shrinkage at low temperature is similar to that of the tape sample, which can reduce the strain generated by different thermal shrinkages of the tape. At the same time, the good insulation of G10 avoids the current shunting situation during current conduction. In addition, the copper current terminal 5 and the sample stage 21 are in the same plane to avoid stress concentration of the superconducting tape.

[0039] In an alternative embodiment, the method for specifically testing the critical current anisotropy of the superconducting tape is as follows: The two ends of the superconducting tape are welded to the copper current terminal 5 with a low-temperature solder 50Sn / 32Pb / 18Cd, and the plane where the copper current terminal 5 welds the superconducting tape is in the same plane as the plane where the sample stage 21 fixes the superconducting tape; a voltage lead is welded along the central axis in the length direction of the superconducting tape and is located in the middle of the tape; the superconducting tape is connected to the electrical signal transmission device through the voltage lead, and the Hall sensor 24 is connected to the electrical signal transmission device through the voltage lead and the current lead; the sample rod is lifted into the cryostat, the gas is replaced and the cryogenic liquid is introduced; a background magnetic field is applied, a working current is applied to the Hall sensor 24, and by rotating the angle adjustment knob 1 to drive the connecting rod 17 to rotate, the worm gear and worm and the spur gear set rotate, and finally drive the sample stage 21 to rotate in the range of 0 - 180°, and the Hall voltage of the Hall sensor 24 is measured to calculate the angle between the tape and the magnetic field; the superconducting tape is energized, and the critical current of the superconducting tape in the background magnetic field at a specific angle is determined according to the voltage value of the superconducting tape. Moreover, based on the sample rod for testing the critical current anisotropy of the superconducting tape of the present invention, the accuracy measured by the above usage method can reach 0.5°.

[0040] It should be noted that, in combination with the magnetic field measurement scenario of the present invention, the structures in the mechanical transmission device and the electrical signal transmission device in the present invention are insulated. The relevant components of the electrical signal transmission device in the present invention are made of conductive materials, such as brass; and the three parts of the device are coupled and associated with each other, thereby realizing the critical current measurement experiment of the superconducting tape under low temperature, large current, and magnetic fields of different magnitudes and angles.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the protection of the present invention and the scope of equivalent technologies, the present invention also intends to include these changes and modifications. The above-described embodiments are only preferred embodiments given to fully illustrate the present invention, and the scope of protection is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are within the scope of protection of the present invention.

Claims

1. A superconducting tape critical current anisotropy test sample rod, characterized in that: It includes a mechanical transmission device, a sample mounting platform, a Hall sensor and an electrical signal transmission device; The mechanical transmission device includes a worm and worm gear transmission group, a spur gear group and a transmission shaft, the worm and worm wheel in the worm and worm gear transmission group are meshed with each other, the worm and the spur gear group are parallel to each other, and the transmission shaft is vertically connected between the worm wheel and the spur gear group; the sample mounting platform includes a sample table and a copper current terminal, the sample table is arranged in the middle part of the copper current terminal, and the copper current terminal is fixedly connected to the spur gear group; the Hall sensor is arranged on the back of the sample table and is electrically connected to the electrical signal transmission device.

2. The superconducting tape critical current anisotropy test sample rod according to claim 1, characterized in that: The mechanical transmission device also includes an angle adjustment knob and a connecting rod; one end of the connecting rod is fixedly connected to the angle adjustment knob, and the other end is connected to the worm in the worm gear transmission group through an internal thread.

3. The superconducting tape critical current anisotropy test sample rod according to claim 1, characterized in that: The spur gear set is two pairs of spur gears symmetrically arranged about the worm gear transmission group, one pair is a first spur gear meshing with a second spur gear, and the other pair is a third spur gear meshing with a fourth spur gear, and the first spur gear and the third spur gear are respectively connected to the worm gear through transmission shafts fixed on both sides of the worm gear, and the second spur gear and the fourth spur gear are connected to the sample mounting platform through the copper current terminal.

4. The superconducting tape critical current anisotropy test sample rod according to claim 3, characterized in that: The transmission ratio of the spur gear set is (3-6):

1.

5. The superconducting tape critical current anisotropy test sample rod according to claim 1, characterized in that: The sample mounting platform also includes a pressing plate, which is used to cover the superconducting tape to be tested and is welded at both ends to the copper current terminals, and is fixed in position with the sample stage.

6. The superconducting tape critical current anisotropy test sample rod according to claim 1, characterized in that: The Hall sensor is arranged on the back of the sample stage and is parallel to the sample stage, so that the Hall sensor is arranged in parallel with the superconducting tape to be tested on the sample stage.

7. The superconducting tape critical current anisotropy test sample rod according to claim 1, characterized in that: The electrical signal transmission device comprises an aviation plug, a first copper terminal, a first copper lead terminal, a second copper terminal, a second copper lead terminal, a first welding terminal, a second welding terminal, a silver-plated copper braid and a twisted pair; The upper end of the first copper lead column is connected to the first copper terminal, and the lower end is connected to the first welding column. The first welding column is welded to the side of the copper current terminal that does not cover the sample stage through a silver-plated copper braid; the upper end of the second copper lead column is connected to the second copper terminal, and the lower end is connected to the second welding column. The second welding column is welded to the other side of the copper current terminal that does not cover the sample stage through a silver-plated copper braid; one end of the twisted pair cable is connected to the Hall sensor through a current lead and a voltage lead, and is used to connect to the superconducting tape to be tested on the sample stage through a voltage lead, and the other end is connected to the aviation plug.

8. The superconducting tape critical current anisotropy test sample rod according to claim 7, characterized in that: The electrical signal transmission device also includes a return air interface and a hollow pipe; the hollow pipe is connected to the return air interface; the signal line welding strip passes through the hollow pipe and is connected to the aviation plug.

9. The superconducting tape critical current anisotropy test sample rod according to claim 7, characterized in that: The silver-plated copper braided belt and the copper current terminal are welded by soldering tin with a melting point of 180-200°C.

10. The superconducting tape critical current anisotropy test sample rod according to claim 8, characterized in that: The sample stage is made of G10 material.

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