A superconducting tape testing apparatus

Abstract

The utility model belongs to the field of strip testing, especially a kind of superconducting strip testing device, the existing testing device cannot be clamped different thickness strip and accurately control the clamping force and testing probe down pressure, also cannot be according to the thickness of strip flexible adjustment testing probe spacing, leading to the problem of reducing test effect and accuracy, present and propose following scheme, it includes device ontology and four testing probes, the top of device ontology is fixedly provided with support frame, the side of support frame is symmetrically rotatably provided with two reels;The top of device ontology is provided with clamping assembly, adjusting mechanism is provided on support frame.The utility model in this paper can not only control the clamping force and testing probe down pressure while adapting different thickness strip, but also ensure that superconducting strip is evenly pressed during testing process, and can flexibly adjust the distance between testing probes according to different thickness of superconducting strip.

Description

Technical Field

[0001] This utility model relates to the field of tape testing technology, and in particular to a superconducting tape testing device. Background Technology

[0002] In superconducting tape testing, the four-probe test has become a key technical means due to its unique advantages, mainly because of the high precision required for resistance measurement of superconducting materials and the excellent performance of the four-probe method in eliminating interference and adapting to the characteristics of the tape.

[0003] Currently, existing superconducting tape testing devices typically possess basic testing functions, but they have significant limitations when dealing with tapes of varying thicknesses. While they may offer simple fixation and testing operations for the tapes, they still suffer from the following drawbacks: 1. The inability to clamp strips of different thicknesses and control the clamping force and the downward pressure of the test probe leads to the superconducting strip bending and deformation under pressure, and reduces the fluctuation of contact resistance.

[0004] 2. The inability to flexibly adjust the test probe spacing according to the strip thickness, enhance the device's versatility and adaptability, ensure uniform and stable contact pressure, and improve the accuracy and reliability of test results, leads to a decrease in test effectiveness and accuracy when facing diverse test requirements. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the inability to clamp strips of different thicknesses and precisely control the clamping force and the downward pressure of the test probes, as well as the inability to flexibly adjust the spacing of the test probes according to the thickness of the strip, which leads to a reduction in test results and accuracy. Therefore, this invention proposes a superconducting strip testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A superconducting tape testing device, comprising: The device body consists of a main body and four test probes. A support frame is fixedly installed on the top of the main body, and two reels are symmetrically rotated on one side of the support frame. The top of the device body is provided with a clamping assembly for clamping superconducting tapes of different thicknesses. The support frame is provided with an adjustment mechanism for adjusting the spacing between the four test probes.

[0007] In one possible design, the clamping assembly includes two support columns symmetrically fixed to the top of the device body and located next to the support frame. The top of the two support columns is fixedly mounted on the same platform, and a strip pressure sensor is embedded in the top of the platform. A frame-shaped pressure frame is slidably mounted on the outer side of each of the two support columns. An electric push rod I is mounted inside each of the two support columns, and the output ends of the two electric push rods I are respectively fixedly connected to the bottom of the two pressure frames.

[0008] In one possible design, the adjustment mechanism includes a frame slidably disposed on one side of a support frame. Four evenly distributed movable seats are slidably disposed inside the frame. Four test probes are respectively mounted on the four movable seats, all located directly above the platform. A lead screw I and a lead screw II are longitudinally rotatably disposed inside the frame. Lead screw I is threadedly connected to two distant movable seats, and lead screw II is threadedly connected to two adjacent movable seats. The thread pitch of lead screw I is greater than that of lead screw II. A motor is fixedly disposed on one side of the frame, and the output shaft of the motor is fixedly connected to lead screw I. Rotary rods are fixedly disposed at one end of both lead screw I and lead screw II on the same side. Synchronous pulleys are fixedly disposed on the outside of both rotating rods, and the two synchronous pulleys are externally driven by the same synchronous belt.

[0009] In one possible design, connecting frames are fixedly installed on both sides of the platform, and guide rollers are rotatably installed on one side of each of the two connecting frames.

[0010] In one possible design, an electric actuator II is fixedly mounted on the top of the middle section of the support frame, and the output end of the electric actuator II is fixedly connected to the top of the frame.

[0011] In one possible design, the test probe includes a tube with a probe slidably disposed through the bottom end of the tube. A spring is disposed inside the tube, and the two ends of the spring are respectively fixedly connected to one end of the probe and the inner wall of the tube through spring seats. A threaded groove is formed on the outside of the tube, and a nut is threadedly connected to the outside of the tube at the threaded groove.

[0012] In one possible design, the bottom of the device body is rectangularly fixed with four suction cups, and each of the four suction cups has a rubber puller fixed on one side.

[0013] In one possible design, the top of the device body is covered with a box cover, one side of the box cover is hinged to a door, one side of the door is provided with an observation window, and the box cover and the door are locked together by a buckle.

[0014] In this application, when starting to use the device, first place the device body on a stable workbench, then press the device to make the suction cup adhere to the workbench, ensuring the device is stable. If it is necessary to move the device, pull the rubber puller on one side of the suction cup to separate the suction cup from the workbench. Next, connect the device body to the power supply and turn it on. Then, open the door on the box cover on the top of the device body, install the reel with the superconducting tape to be tested on the support frame, then pull one end of the superconducting tape to lead out one end of the superconducting tape, pass around the guide roller and extend to the platform, so that the superconducting tape passes over the platform, then passes around and pulls out from another guide roller, and then winds the pulled-out superconducting tape onto another reel (this reel can be equipped with an electric rotating roller to drive it to rotate). Then, set the parameters on the device body according to the thickness of the superconducting tape. Then, the electric actuator I inside the two support columns is activated by the device body. The output end of the electric actuator I retracts and pulls the pressure frame downward until the pressure frame clamps the superconducting tape on the platform. During the clamping process, the strip pressure sensor can sense the pressure on the superconducting tape. When the clamping pressure is too high, the electric actuator I stops moving to ensure that the superconducting tape is evenly compressed during clamping. After the superconducting tape is clamped, first remove the container filled with liquid nitrogen (such as an insulated tank), then place the container inside the enclosure. During the container placement process, immerse the clamped superconducting tape in liquid nitrogen in the detection area. Then, adjust the spacing between the four test probes according to the thickness of the superconducting tape. At this point, the motor starts, and the motor's output shaft drives lead screw I to rotate. Lead screw I and lead screw II both have rotating rods fixed to one end on the same side. Synchronous pulleys are fixed to the outside of both rotating rods, and the same synchronous belt is fitted onto the external transmission sleeves of the two synchronous pulleys. Therefore, the rotation of lead screw I will drive lead screw II to rotate via the synchronous belt. Lead screw I is threadedly connected to two far-away moving seats, and lead screw II is threadedly connected to two near-away moving seats. The thread pitch of lead screw I is greater than that of lead screw II. This allows lead screw I and lead screw II to drive their respective moving seats to move within the frame as they rotate. When the four moving seats move, the far-away... The two movable seats that are far apart move faster than the two movable seats that are close together, thereby adjusting the spacing between the four test probes mounted on the four movable seats to accommodate tests of superconducting tapes of different thicknesses. (Because superconducting tapes of different thicknesses have different physical properties, if the probe spacing is fixed, too large a spacing will prevent the probes from effectively contacting thinner superconducting tapes, resulting in weak test signals and inaccurate data. On the other hand, too small a spacing may deform the tapes due to compression when testing thicker superconducting tapes, affecting their electrical properties and potentially damaging the probes. Adjusting the probe spacing according to the thickness of the superconducting tape ensures good contact between the probes and the tapes, makes the pressure uniform during testing, reduces contact resistance fluctuations, and thus obtains accurate and reliable test data, ensuring the accuracy and validity of the test results.) After adjusting the four test probes to the appropriate spacing, the motor is stopped to accommodate tests of superconducting tapes of different thicknesses. After completing the above preparations, control the four test probes to descend synchronously, start the support frame electric push rod II, the output end of electric push rod II pushes the frame to move downward, the frame drives the four moving seats and the test probes installed on the moving seats to descend synchronously, so that the probes on the test probes are pressed down onto the superconducting tape. The tube of the test probe is equipped with a spring, and the two ends of the spring are fixedly connected to one end of the probe and the inner wall of the tube through spring seats. During the pressing process, the spring plays a buffering role to ensure that the pressure of the probe pressing down onto the superconducting tape is uniform. At the same time, the strip pressure sensor can sense the pressure on the superconducting tape to ensure that the superconducting tape is pressed evenly when the probe is pressed down, so as not to cause the superconducting tape to bend and deform, reduce contact resistance fluctuations, and ensure the accuracy of the test. At this time, the probe pressed on the superconducting tape is also in liquid nitrogen. During the test, the operator can observe the test situation through the observation window set on one side of the cover, and finally obtain the test data through the device body connected to the test probe to complete the test of the superconducting tape.

[0015] This utility model has the following beneficial effects: This invention, through the design of the clamping component, can adapt to strips of different thicknesses while controlling the clamping force and the pressure of the test probe, ensuring that the superconducting strip is subjected to uniform pressure during the test, effectively avoiding bending and deformation of the superconducting strip due to uneven pressure, reducing contact resistance fluctuations, and thus providing a reliable guarantee for subsequent accurate testing of the superconducting strip performance.

[0016] This invention, through the setting of the adjustment mechanism, can flexibly adjust the test probe spacing according to the superconducting tape of different thicknesses. This enhances the versatility and adaptability of the device, meeting diverse testing needs without requiring equipment replacement or complex modifications due to changes in the thickness of the superconducting tape. Furthermore, the precise spacing adjustment ensures good contact between the test probe and the superconducting tape, resulting in uniform and stable contact pressure. This effectively avoids data errors caused by poor contact or uneven pressure, thereby improving the accuracy and reliability of the test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a superconducting tape testing device proposed in this utility model; Figure 2 This is a schematic diagram of the overall door opening structure of a superconducting tape testing device proposed in this utility model; Figure 3 This is a schematic diagram of the overall enclosure removal and partially enlarged structure of a superconducting tape testing device proposed in this utility model. Figure 4 This is a cross-sectional view of the frame structure of a superconducting tape testing device proposed in this utility model; Figure 5This is a cross-sectional view of the test probe of a superconducting tape testing device proposed in this utility model.

[0018] In the diagram: 1. Device body; 2. Cover; 3. Door; 4. Support column; 5. Platform; 6. Strip pressure sensor; 7. Pressure frame; 8. Electric actuator I; 9. Support frame; 10. Reel; 11. Electric actuator II; 12. Frame; 13. Moving seat; 14. Test probe; 1401. Tube; 1402. Probe; 1403. Spring; 1404. Threaded groove; 1405. Nut; 15. Lead screw I; 16. Lead screw II; 17. Synchronous pulley; 18. Synchronous belt; 19. Motor; 20. Connecting frame; 21. Guide roller; 22. Suction cup. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] In one embodiment Reference Figure 1-5 A testing apparatus, comprising: The device body 1 and four test probes 14 are included. The device body 1 serves as the basic support structure of the entire testing device. Four suction cups 22 are fixedly installed on the bottom in a rectangular shape. The device body 1 can be attached to the worktable by the suction cups 22, thereby fixing the device body 1 firmly and preventing the device from moving during the test and affecting the test results. Each suction cup 22 has a rubber puller fixed on one side. By operating the rubber puller, the suction cup 22 can be detached from the worktable, so that the device body 1 can be moved and transported.

[0021] The top of the device body 1 is covered by a box cover 2. A door 3 is installed on one side of the box cover 2 via a hinge. The door 3 is equipped with an observation window to facilitate the operator to observe the internal situation during the test. The box cover 2 and the door 3 are locked together by a buckle to ensure that a relatively closed space is formed inside the box cover 2 during the test, reducing the interference of external factors on the test. At the same time, the top of the device body 1 is equipped with a container (such as a heat preservation tank) inside the box cover 2. The shape and size of the container can be selected according to actual needs. During the superconducting tape test, the fixed superconducting tape and the probe 1402 pressed on it are both in liquid nitrogen.

[0022] A support frame 9 is fixedly installed on the top of the device body 1. An electric push rod II 11 is fixedly installed on the top of the middle section of the support frame 9. Two reels 10 are symmetrically rotated on one side of the support frame 9. These two reels 10 are used to wind the superconducting tape, which facilitates the transportation and storage of the superconducting tape during testing.

[0023] A clamping assembly is provided on the top of the device body 1. This clamping assembly includes two support columns 4 symmetrically fixed on the top of the device body 1 and located next to the support frame 9. The top of the two support columns 4 is fixedly mounted on the same platform 5. Connecting frames 20 are fixedly provided on both sides of the platform 5. Guide rollers 21 are rotatably provided on one side of each of the two connecting frames 20. The guide rollers 21 can guide the superconducting tape during the conveying process, so that the superconducting tape can be placed stably on the platform 5. A strip pressure sensor 6 is embedded in the top of the platform 5. The strip pressure sensor 6 can sense the pressure on the superconducting tape when clamping the superconducting tape and when the probe 1402 is pressed down, ensuring the superconducting tape is clamped. When the probe 1402 is pressed down, the superconducting tape is subjected to uniform pressure. Frame-shaped pressure frames 7 are slidably installed on the outer sides of both support columns 4. The frame-shaped pressure frames 7 can accommodate superconducting tapes of different thicknesses. Electric actuators I8 are installed inside both support columns 4. The output ends of the two electric actuators I8 are fixedly connected to the bottom of the two pressure frames 7 respectively. When it is necessary to clamp superconducting tapes of different thicknesses, the electric actuators I8 are activated. The output ends of the electric actuators I8 extend and retract, driving the frame-shaped pressure frames 7 to move up and down, thereby accommodating tapes of different thicknesses and ensuring uniform pressure from the probe 1402. This prevents the superconducting tape from bending and deforming, reduces contact resistance fluctuations, and ensures that the accuracy of the test is not affected.

[0024] An adjustment mechanism is provided on the support frame 9. This mechanism includes a frame 12 slidably mounted on one side of the support frame 9. Four evenly distributed movable seats 13 are slidably mounted inside the frame 12. Four test probes 14 are respectively mounted on the four movable seats 13, and all four test probes 14 are located directly above the platform 5. A lead screw I 15 and a lead screw II 16 are longitudinally rotatably mounted inside the frame 12. Lead screw I 15 is threadedly connected to two distant movable seats 13, and lead screw II 16 is threadedly connected to two adjacent movable seats 13. The thread pitch of lead screw I 15 is greater than that of lead screw II 16. A motor 19 is fixedly mounted on one side of the frame 12. The output shaft of the motor 19 is fixedly connected to lead screw I 15. Rotary rods are fixedly mounted on one end of both lead screw I 15 and lead screw II 16 on the same side. Synchronous pulleys 17 are fixedly mounted on the outside of both rotating rods. The outer transmission sleeves of the two synchronous pulleys 17 are equipped with the same... When the spacing between test probes 14 needs to be adjusted according to the different thicknesses of superconducting tapes, the synchronous belt 18 is used. The motor 19 is started, and the output shaft of the motor 19 drives the lead screw I 15 to rotate. When the lead screw I 15 rotates, it drives the lead screw II 16 to rotate synchronously through the transmission action of the synchronous pulley 17 and the synchronous belt 18. Since the lead screw I 15 is threadedly connected to two far-away moving seats 13, and the lead screw II 16 is threadedly connected to two close-away moving seats 13, and the thread pitch of the lead screw I 15 is greater than that of the lead screw II 16, when the lead screw I 15 and the lead screw II 16 rotate, the moving seats 13 located on different lead screws will move at different speeds. The two far-away moving seats 13 move relatively faster, and the two close-away moving seats 13 move relatively slower. Thus, the spacing between test probes 14 can be flexibly adjusted according to the different thicknesses of superconducting tapes to adapt to the testing of superconducting tapes of different thicknesses.

[0025] This application can be used in the field of superconducting tape testing equipment technology, and can also be used in other fields applicable to this application.

[0026] In another embodiment Reference Figure 5 A superconducting tape testing device is disclosed, which is applied to the technical field of superconducting tape testing devices. The test probe 14 includes a tube 1401, with a probe 1402 slidably disposed through the bottom end of the tube 1401. A spring 1403 is disposed inside the tube 1401, and the two ends of the spring 1403 are respectively fixedly connected to one end of the probe 1402 and the inner wall of the tube 1401 through spring seats. A threaded groove 1404 is opened on the outside of the tube 1401, and a nut 1405 is threadedly connected to the outside of the tube 1401 at the threaded groove 1404. By rotating the nut 1405, the test probe 14 can be mounted on the movable seat 13. By setting the spring 1403, the probe 1402 can be pressed down to buffer the pressure and avoid hard contact with the superconducting tape.

[0027] However, as is well known to those skilled in the art, the working principles and wiring methods of the device body 1, the bar pressure sensor 6, the electric actuator I, the electric actuator II 11, the test probe 14 and the motor 19 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0028] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A testing device for superconducting tapes, characterized in that, include: The device body (1) and four test probes (14) are provided. A support frame (9) is fixedly installed on the top of the device body (1). Two reels (10) are symmetrically rotated on one side of the support frame (9). The device body (1) is provided with a clamping assembly on its top, which is used to clamp superconducting tapes of different thicknesses. The support frame (9) is provided with an adjustment mechanism, which is used to adjust the spacing between the four test probes (14).

2. The superconducting tape testing device according to claim 1, characterized in that, The clamping assembly includes two support columns (4) that are symmetrically fixed on the top of the device body (1) and located next to the support frame (9). The top of the two support columns (4) is fixedly provided with the same platform (5). A strip pressure sensor (6) is embedded in the top of the platform (5). A frame-type pressure frame (7) is slidably provided on the outer side of the two support columns (4). An electric push rod I (8) is provided inside the two support columns (4). The output ends of the two electric push rods I (8) are respectively fixedly connected to the bottom of the two pressure frames (7).

3. The superconducting tape testing device according to claim 1, characterized in that, The adjustment mechanism includes a frame (12) slidably disposed on one side of the support frame (9). Four evenly distributed movable seats (13) are slidably disposed inside the frame (12). Four test probes (14) are respectively mounted on the four movable seats (13), and all four test probes (14) are located directly above the platform (5). A lead screw I (15) and a lead screw II (16) are longitudinally rotatably disposed inside the frame (12). The lead screw I (15) is threadedly connected to two distant movable seats (13), and the lead screw II (16)... 16) It is threadedly connected to two adjacent movable seats (13). The thread pitch of the lead screw I (15) is greater than that of the lead screw II (16). A motor (19) is fixedly installed on one side of the frame (12). The output shaft of the motor (19) is fixedly connected to the lead screw I (15). A rotating rod is fixedly installed at one end of the same side of the lead screw I (15) and the lead screw II (16). A synchronous pulley (17) is fixedly installed on the outside of the two rotating rods. The same synchronous belt (18) is sleeved on the outside of the two synchronous pulleys (17).

4. The superconducting tape testing device according to claim 2, characterized in that, Both sides of the platform (5) are fixedly provided with connecting frames (20), and one side of each of the two connecting frames (20) is rotatably provided with guide rollers (21).

5. The superconducting tape testing device according to claim 2, characterized in that, The support frame (9) is fixedly equipped with an electric actuator II (11) at the top of the middle section, and the output end of the electric actuator II (11) is fixedly connected to the top of the frame (12).

6. The superconducting tape testing device according to claim 1, characterized in that, The test probe (14) includes a tube (1401), with a probe (1402) slidably disposed through the bottom end of the tube (1401). A spring (1403) is disposed inside the tube (1401), and the two ends of the spring (1403) are respectively fixedly connected to one end of the probe (1402) and the inner wall of the tube (1401) through spring seats. A threaded groove (1404) is provided on the outside of the tube (1401), and a nut (1405) is threadedly connected to the outside of the tube (1401) at the threaded groove (1404).

7. The superconducting tape testing device according to claim 1, characterized in that, The bottom of the device body (1) is rectangularly fixed with four suction cups (22), and a rubber puller is fixed on one side of each of the four suction cups (22).

8. The superconducting tape testing device according to claim 1, characterized in that, The top of the device body (1) is covered with a box cover (2), and a door (3) is provided on one side of the box cover (2) by a hinge. An observation window is provided on one side of the door (3). The box cover (2) and the door (3) are locked together by a buckle.

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