CN113281687A - Superconducting long belt critical current continuous measurement device and measurement method thereof - Google Patents
Superconducting long belt critical current continuous measurement device and measurement method thereof Download PDFInfo
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- CN113281687A CN113281687A CN202110701138.4A CN202110701138A CN113281687A CN 113281687 A CN113281687 A CN 113281687A CN 202110701138 A CN202110701138 A CN 202110701138A CN 113281687 A CN113281687 A CN 113281687A
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- G01R33/1246—Measuring critical current
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Abstract
The utility model provides a superconductive long area critical current serialization measuring device and measuring method, includes first take-up reel (1), second take-up reel (2), brake unit, measuring element, liquid nitrogen bath (3), its characterized in that: the head end and the tail end of the superconducting long belt (4) for testing are respectively wound on the first take-up reel (1) and the second take-up reel (2), and the section of the superconducting long belt to be tested is placed in the liquid nitrogen tank (3); the brake unit detects the tension of the section to be detected of the superconducting long belt and adjusts the rotating speed of the first take-up reel (1) and the second take-up reel (2) based on the tension; the measuring unit measures the critical current of the section to be measured of the superconducting long belt based on a four-lead method. The testing device has the advantages of high testing accuracy, small system error, convenient operation and low cost.
Description
Technical Field
The invention relates to the field of superconducting power transmission, in particular to a superconducting long belt critical current continuous measuring device and a measuring method thereof.
Background
The application of superconducting technology in power systems is various, and is one of the main directions of research on superconducting application in recent years. Compared to power cables, superconducting cables have great advantages, such as: the power transmission capacity is strong, the cost is saved, the occupied space is small, the line impedance is extremely low, the power transmission loss is small, and the anti-magnetic interference capacity is strong; the method allows long-distance power transmission with relatively low voltage, and can also transmit power underground, thereby avoiding noise, electromagnetic pollution and potential safety hazard caused by ultrahigh-voltage high-altitude power transmission and protecting the ecological environment.
At present, critical current is an important index for measuring the current carrying capacity of the high-temperature superconducting tape, and is an essential detection item in the detection process of the high-temperature superconducting tape. Background art 1: CN206584030U discloses a device for testing critical current of superconductor material, which is composed of a refrigerant box, a strip fixing plate, a wiring hole, a metal connector lug, a current lead, a voltage lead, a transmission device and a detection device. Through the transmission of the transmission device, the disassembly and assembly of the superconducting tapes and the simultaneous testing of multiple groups are conveniently realized. Background art 2: a method for testing critical current characteristics of a novel YBCO high-temperature superconducting tape comprises the steps of Jiahui and the like, low temperature and superconduction, and the No. 5 of volume 37. In the background art 2, a four-lead method is adopted for critical current characteristic testing of a superconducting tape, a testing system of the method is arranged in a low-temperature Dewar flask, and devices such as a tape support suspender and the like are made of materials with small deformation at low temperature and have good mechanical strength. However, none of the prior art testing devices conveniently moves the position of the superconducting tape during the testing process and performs multiple measurements on different portions of the tape. This makes it impossible to analyze the overall critical current distribution of the superconducting tapes.
Therefore, a new continuous measurement device for critical current of a superconducting long tape and a measurement method thereof are needed, which can perform multiple measurements for different positions of the superconducting long tape and accurately obtain and record measurement data.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a device and a method for continuously measuring the critical current of a superconducting long belt, which ensure the stable tension of a section to be measured of the superconducting long belt by changing the rotating speeds of a first take-up reel and a second take-up reel. And critical current tests are carried out on different positions of the superconducting long belt according to the wire winding and unwinding operations of the first take-up reel and the second take-up reel, so that the critical current distribution condition of the superconducting long belt is generated.
The invention adopts the following technical scheme. The invention relates to a superconducting long belt critical current continuous measuring device, which comprises a first take-up reel 1, a second take-up reel 2, a brake unit, a measuring unit and a liquid nitrogen tank 3, and is characterized in that: the head end and the tail end of the superconducting long belt 4 for testing are respectively wound on the first take-up reel 1 and the second take-up reel 2, and the section of the superconducting long belt to be tested is placed in the liquid nitrogen tank 3; the brake unit detects the tension of the section to be detected of the superconducting long belt and adjusts the rotating speed of the first take-up reel 1 and the second take-up reel 2 based on the tension; and the measuring unit is used for measuring the critical current of the section to be measured of the superconducting long belt based on a four-lead method.
Preferably, the device comprises a pressure sensor for measuring the tension of the section to be measured of the superconducting long belt and feeding back tension data; wherein, the tension of the section to be measured of the superconducting long belt is obtained based on the rotation of the first take-up reel 1 and the second take-up reel 2.
Preferably, the brake unit controls a difference in rotational speed between the first take-up reel 1 and the second take-up reel 2 based on the tension data.
Preferably, the rotation of the first take-up reel 1 and the second take-up reel 2 is performed by an automatic or manual manner.
Preferably, the device further comprises a control module, and when the rotation of the first take-up reel and the second take-up reel is executed in an automatic mode, the control module is used for setting the rotation speed of the first take-up reel 1 and the second take-up reel 2.
Preferably, the liquid nitrogen tank 3 is further provided with a first steering wheel 5 and a second steering wheel 6 which are respectively positioned at two ends in the liquid nitrogen tank 3 and are used for respectively receiving the superconducting long belt 4 from the first take-up reel 1 and the second take-up reel 2 and arranging the section to be measured of the superconducting long belt on a fixed position in the liquid nitrogen tank 3; the first take-up reel 1 is further provided with a reverse wheel 7 on one side, and the reverse wheel is used for carrying the superconducting long belt between the first take-up reel 1 and the first steering wheel 5, so that the first take-up reel 1 and the second take-up reel 2 can rotate in the same direction.
Preferably, the first take-up reel 1 and the second take-up reel 2 are used for winding and unwinding the superconducting long belt 4 so as to enable the section to be detected of the superconducting long belt to move into the liquid nitrogen tank 3; the section to be measured of the superconducting long belt is a plurality of sections and is positioned at any position of the middle section of the superconducting long belt.
Preferably, the device further comprises a position recording unit for recording the position of the superconducting long belt in the liquid nitrogen tank according to the retracting and releasing operations of the first take-up reel and the second take-up reel.
Preferably, the brake unit further comprises a first stopper 8 and a second stopper 9, and the first stopper 8 and the second stopper 9 are respectively located at the superconducting long belt outlet outside the liquid nitrogen tank 3.
Preferably, the device further comprises a control module for controlling the braking or releasing state of the stopper, and limiting the movement of the superconducting long belt when the stopper is braked.
Preferably, the liquid nitrogen tank 3 is used for filling liquid nitrogen, and the section to be measured of the superconducting long belt is placed outside the liquid nitrogen tank at the ambient temperature of 77K, and a drying device 10 is arranged outside the liquid nitrogen tank and used for drying the superconducting long belt 4 removed from the liquid nitrogen tank 3.
Preferably, the current lead 11 in the measuring unit is crimped.
Preferably, the device further comprises a control module for controlling the current application of the measuring unit and the acquisition of the measurement data.
Preferably, the device further comprises a computer and a control module, wherein an interactive interface of the computer is used for acquiring and displaying the state parameters of the device based on the control module, and the computer is also used for sending a control instruction to the control module based on interactive operation.
The invention relates to a continuous measurement method for critical current of a superconducting long belt, which comprises the following steps: step 1, measuring the critical current of a segment to be measured of the superconducting long tape by using the superconducting long tape critical current continuous measuring device in the first aspect of the invention; and 2, generating critical current distribution of the superconducting long belt based on the length direction based on the measurement.
Compared with the prior art, the device and the method for testing the critical current of the superconducting long belt have the advantages that stable tension of a section to be tested of the superconducting long belt can be ensured by changing the rotating speeds of the first take-up reel and the second take-up reel, so that the accuracy of a test result is improved. And meanwhile, critical current tests are carried out on different positions of the superconducting long belt according to the winding and unwinding operations of the first take-up reel and the second take-up reel, so that the superconducting long belt is tested for multiple times more conveniently, the critical current distribution condition of the superconducting long belt is generated, the system error is small, the operation is convenient, and the cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a device for continuous measurement of critical current of a superconducting tape according to the present invention;
FIG. 2 is a schematic diagram of an interface of a superconducting tape critical current continuity measuring apparatus according to the present invention;
FIG. 3 is a schematic diagram of an embodiment of a device for continuous measurement of critical current of superconducting tapes according to the present invention.
Reference numerals:
1-a first take-up reel;
2-a second take-up reel;
3-a liquid nitrogen tank;
4-superconducting long tape;
5-a first steering wheel;
6-a second steerable wheel;
7-a reverse wheel;
8-a first stop;
9-a second stop;
10-a drying device;
11-current leads;
12-Voltage lead.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Fig. 1 is a schematic structural diagram of a superconducting long tape critical current continuous measurement device according to the present invention. As shown in fig. 1, a superconducting long tape critical current continuous measurement device includes a first take-up reel 1, a second take-up reel 2, a brake unit, a measurement unit, and a liquid nitrogen tank 3. The head end and the tail end of the superconducting long belt 4 for testing are respectively wound on the first take-up reel 1 and the second take-up reel 2, and the section of the superconducting long belt to be tested is placed in the liquid nitrogen tank 3; the brake unit detects the tension of the section to be detected of the superconducting long belt and adjusts the rotating speed of the first take-up reel 1 and the second take-up reel 2 based on the tension; and the measuring unit is used for measuring the critical current of the section to be measured of the superconducting long belt based on a four-lead method.
It is understood that, in the present invention, one end of the superconducting tape is wound on the first take-up reel, and the other end is wound on the second take-up reel. The unwound portion of the superconducting tape may be placed in a bath of liquid nitrogen for measurement. The first take-up reel and the second take-up reel can control the part to be measured in the superconducting long belt to be placed in a liquid nitrogen tank through clockwise or anticlockwise rotation.
Preferably, the device comprises a pressure sensor for measuring the tension of the section to be measured of the superconducting long belt and feeding back tension data; wherein, the tension of the section to be measured of the superconducting long belt is obtained based on the rotation of the first take-up reel 1 and the second take-up reel 2.
In order to adjust the tension of the section to be measured of the superconducting long tape, the rotating speed of the first take-up reel 1 and the second take-up reel 2 can be changed. For example, when the unwinding speed of the first winding reel is fast and the winding speed of the second winding reel is slow, the tension of the segment to be measured of the superconducting tape is reduced. When the paying-off speed of the first take-up reel is slow and the taking-up speed of the second take-up reel is fast, the tension of the section to be measured of the superconducting long belt can be increased.
In order to better track and know the tension on the superconducting long belt, in an embodiment of the present invention, a pressure sensor may be further added to the apparatus, and the pressure sensor may accurately measure the tension of the section to be measured of the superconducting long belt and feed back the tension data to the interactive interface of the computer through the control unit.
Preferably, the brake unit controls a difference in rotational speed between the first take-up reel 1 and the second take-up reel 2 based on the tension data. The test operator can select to operate the brake unit according to the tension data displayed on the interactive interface, and change the rotating speed difference between the first take-up reel 1 and the second take-up reel 2, so that the tension is further changed. Therefore, a closed loop tension control can be formed inside the device, so that the superconducting long belt is ensured to have stable tension during the belt walking process.
Preferably, the rotation of the first take-up reel 1 and the second take-up reel 2 is performed by an automatic or manual manner.
FIG. 2 is a schematic diagram of an interface in a superconducting tape critical current continuous measurement apparatus according to the present invention. FIG. 3 is a schematic diagram of an embodiment of a device for continuous measurement of critical current of superconducting tapes according to the present invention. As shown in fig. 2 to 3, the rotation modes of the first take-up reel and the second take-up reel in the measuring device can be switched by selecting an automatic operation key or a manual operation key on the operation interface.
Preferably, the device further comprises a control module, and when the rotation of the first take-up reel and the second take-up reel is executed in an automatic mode, the control module is used for setting the rotation speed of the first take-up reel 1 and the second take-up reel 2. Particularly, in the automatic operation process, a measurer can set the rotating speeds of the first take-up reel and the second take-up reel respectively. In the manual operation process, a measurer can manually rotate the take-up reel according to experience.
Preferably, the liquid nitrogen tank 3 is further provided with a first steering wheel 5 and a second steering wheel 6, which are respectively located at two ends in the liquid nitrogen tank 3, and are used for respectively receiving the superconducting long belt 4 from the first take-up reel 1 and the second take-up reel 2, and arranging the to-be-measured segment of the superconducting long belt at a fixed position in the liquid nitrogen tank 3.
It will be appreciated that in order to better fix the portion of superconducting tape to be measured in the liquid nitrogen tank, so that the measurement unit and the measurement environment are more conveniently located, two steering devices of superconducting tape, i.e. a first steering wheel 5 and a second steering wheel 6, may be added to the liquid nitrogen tank.
Preferably, a reversing wheel 7 is further disposed on one side of the first take-up reel 1, and is used for carrying the superconducting long tape between the first take-up reel 1 and the first reversing wheel 5, so that the first take-up reel 1 and the second take-up reel 2 rotate in the same direction. Through the setting of reverse wheel, the unwrapping wire direction of first take-up reel is the same with the receipts line direction of second take-up reel turns to, vice versa. Therefore, the first take-up reel can be used as a driving wheel, and the second take-up reel can be used as a driven wheel to manually control the rotation of the first take-up reel and the second take-up reel. Or the second take-up reel is used as a driving wheel, and the first take-up reel is used as a driven wheel to manually control the rotation of the first take-up reel and the second take-up reel.
Preferably, the first take-up reel 1 and the second take-up reel 2 are used for winding and unwinding the superconducting long belt 4 so as to enable the section to be detected of the superconducting long belt to move into the liquid nitrogen tank 3; the section to be measured of the superconducting long belt is a plurality of sections and is positioned at any position of the middle section of the superconducting long belt.
Preferably, the device further comprises a position recording unit for recording the position of the superconducting long belt in the liquid nitrogen tank according to the retracting and releasing operations of the first take-up reel and the second take-up reel. It should be noted that the position recording unit can send and display the position data in the interactive interface of the computer through the control module. As shown in fig. 2, the length of the run and the percentage of the run in millimeters of the superconducting tape will be displayed in the interactive interface as the first and second take-up reels rotate.
Preferably, the brake unit further comprises a first stopper 8 and a second stopper 9, and the first stopper 8 and the second stopper 9 are respectively located at the superconducting long belt outlet outside the liquid nitrogen tank 3. The first and second stoppers have two working states of braking and releasing, and when the stoppers are in the braking state, the stoppers clamp the superconducting long tape to prevent the superconducting long tape from moving. When the limiter is in a loose state, the take-up reel can be automatically or manually operated to enable the superconducting long belt to be wound and unwound. Preferably, the device further comprises a control module for controlling the braking or releasing state of the stopper, and when the stopper brakes, the control module is used for limiting the movement of the superconducting long belt.
Preferably, the liquid nitrogen tank 3 is used for filling liquid nitrogen, and the to-be-measured section of the superconducting long belt is placed in a 77K environment temperature. Meanwhile, in order to better realize the measurement, part of the components in the measurement unit can be placed in the liquid nitrogen tank at the same time.
Preferably, a drying device 10 is provided outside the liquid nitrogen tank for drying the superconducting long tape 4 removed from the liquid nitrogen tank 3.
Generally speaking, at least two current leads 11 and two voltage leads 12 should be included in the measurement unit, so that the measurement unit can measure the to-be-measured section of the superconducting long tape by a four-lead method commonly used in the prior art. Preferably, the current lead 11 in the measuring unit can be made by crimping.
Preferably, the device further comprises a control module for controlling the current application of the measuring unit and the acquisition of the measurement data. In an embodiment of the present invention, the control module may be a PLC (Programmable Logic Controller) module. As described above, the control module can control not only the current application of the measuring unit and the acquisition of the measurement data, but also the running of the superconducting long tape and the working states of the stopper, the drying device, and the like.
Preferably, the device further comprises a computer, an interactive interface of the computer is used for acquiring and displaying the state parameters of the device based on the control module, and the computer is also used for sending a control instruction to the control module based on interactive operation. As shown in fig. 2, the interactive interface of the computer may be used to control the start and end of the test, and control the operation mode and the operation direction of the first and second take-up reels. Meanwhile, basic parameters of the test, such as the full length of the superconducting long belt, can be set in the interactive interface. The interface is also capable of controlling the operating state of the various components of the device and instructing the measurement unit to take measurements. It should be noted that the measuring unit can send the measured voltage and current data to the control unit, so that the computer can collect, display and store the data.
The invention also relates to a method for continuously measuring the critical current of the superconducting long belt. The method comprises a step 1 and a step 2.
Step 1, measuring the critical current of the segment to be measured of the superconducting long tape by using the superconducting long tape critical current continuous measuring device in the first aspect of the invention.
The measurement can be divided into a plurality of times, and a plurality of sections to be measured of the superconducting long belt can be set before the experiment. And then sequentially running the superconducting long belt to each section to be measured, and then carrying out critical current measurement once. Wherein, 1 μ V/cm can be used as the electric field criterion of the critical current test, and the current charge of the test section is judged to reach the critical current by a program.
And 2, generating critical current distribution of the superconducting long belt based on the length direction based on the measurement.
And assigning position data of the corresponding superconducting long belt to each critical current measurement value, so as to generate critical current distribution of the superconducting long belt based on the length direction.
Compared with the prior art, the device and the method for testing the critical current of the superconducting long belt have the advantages that stable tension of a section to be tested of the superconducting long belt can be ensured by changing the rotating speeds of the first take-up reel and the second take-up reel, so that the accuracy of a test result is improved. And meanwhile, critical current tests are carried out on different positions of the superconducting long belt according to the winding and unwinding operations of the first take-up reel and the second take-up reel, so that the superconducting long belt is tested for multiple times more conveniently, the critical current distribution condition of the superconducting long belt is generated, the system error is small, the operation is convenient, and the cost is low.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. The utility model provides a long critical current serialization measuring device of superconductive tape, includes first take-up reel (1), second take-up reel (2), brake unit, measuring element, liquid nitrogen bath (3), its characterized in that:
the head end and the tail end of the superconducting long belt (4) for testing are respectively wound on the first take-up reel (1) and the second take-up reel (2), and the section of the superconducting long belt to be tested is placed in the liquid nitrogen tank (3);
the brake unit detects the tension of the section to be detected of the superconducting long belt and adjusts the rotating speed of the first take-up reel (1) and the second take-up reel (2) based on the tension;
the measuring unit measures the critical current of the section to be measured of the superconducting long belt based on a four-lead method.
2. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 1, wherein:
the device comprises a pressure sensor, a data processing unit and a data processing unit, wherein the pressure sensor is used for measuring the tension of the section to be measured of the superconducting long tape and feeding back the tension data;
wherein the tension of the section to be measured of the superconducting long belt is obtained based on the rotation of the first take-up reel (1) and the second take-up reel (2).
3. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 2, wherein:
the brake unit is used for controlling the rotation speed difference between the first take-up reel (1) and the second take-up reel (2) based on the tension data;
preferably, the rotation of the first take-up reel (1) and the second take-up reel (2) is performed in an automatic or manual manner;
preferably, the device further comprises a control module, and when the first take-up reel and the second take-up reel rotate in an automatic mode, the control module is used for setting the rotation speed of the first take-up reel (1) and the second take-up reel (2).
4. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 1, wherein:
the liquid nitrogen tank (3) is also internally provided with a first steering wheel (5) and a second steering wheel (6), which are respectively positioned at two ends in the liquid nitrogen tank (3) and used for respectively receiving the superconducting long belt (4) from the first take-up reel (1) and the second take-up reel (2) and arranging a section to be measured of the superconducting long belt at a fixed position in the liquid nitrogen tank (3);
and a reverse wheel (7) is further arranged on one side of the first take-up reel (1) and used for carrying the superconducting long belt between the first take-up reel (1) and the first reverse wheel (5), so that the first take-up reel (1) and the second take-up reel (2) are identical in rotation direction.
5. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 1, wherein:
the first take-up reel (1) and the second take-up reel (2) are used for winding and unwinding the superconducting long belt (4) so as to enable a section to be detected of the superconducting long belt to move into the liquid nitrogen tank (3);
the section to be measured of the superconducting long belt is a plurality of sections and is positioned at any position of the middle section of the superconducting long belt;
preferably, the device further comprises a position recording unit, which is used for recording the position of the superconducting long tape in the liquid nitrogen tank according to the retracting and releasing operations of the first take-up reel and the second take-up reel.
6. A superconducting long tape critical current continuous measurement apparatus according to claim 5, wherein:
the brake unit further comprises a first stopper (8) and a second stopper (9), and the first stopper (8) and the second stopper (9) are respectively positioned at an outlet of the superconducting long belt outside the liquid nitrogen tank (3);
preferably, the device further comprises a control module for controlling the braking or releasing state of the stopper, and when the stopper brakes, the control module is used for limiting the movement of the superconducting long belt.
7. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 1, wherein:
the liquid nitrogen tank (3) is used for filling liquid nitrogen and placing the section to be detected of the superconducting long belt at the environment temperature of 77K;
and a drying device (10) is arranged outside the liquid nitrogen tank and is used for drying the superconducting long belt (4) moved out of the liquid nitrogen tank (3).
8. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 1, wherein:
a current lead (11) in the measuring unit adopts a compression joint mode;
preferably, the device further comprises a control module for controlling the current application of the measuring unit and the acquisition of the measurement data.
9. A superconducting long tape critical current continuous measurement apparatus as claimed in claim 1, wherein:
the device further comprises a computer and a control module, wherein an interactive interface of the computer is used for acquiring and displaying the state parameters of the device based on the control module, and the computer is also used for sending a control instruction to the control module based on interactive operation.
10. A method for continuously measuring critical current of a superconducting long belt is characterized by comprising the following steps:
step 1, measuring the critical current of a segment to be measured of the superconducting long tape by using the superconducting long tape critical current continuous measuring device as claimed in any one of claims 1 to 9;
and 2, generating critical current distribution of the superconducting long tape based on the length direction based on the measurement.
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| CN202110701138.4A CN113281687A (en) | 2021-06-23 | 2021-06-23 | Superconducting long belt critical current continuous measurement device and measurement method thereof |
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| CN202110701138.4A CN113281687A (en) | 2021-06-23 | 2021-06-23 | Superconducting long belt critical current continuous measurement device and measurement method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280514A (en) * | 2021-12-30 | 2022-04-05 | 东部超导科技（苏州）有限公司 | Method and device for quickly positioning critical current low point of superconducting strip |
| CN115267625A (en) * | 2022-08-03 | 2022-11-01 | 核工业西南物理研究院 | Continuous measurement device and method for critical current of superconducting cable in field |
-
2021
- 2021-06-23 CN CN202110701138.4A patent/CN113281687A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280514A (en) * | 2021-12-30 | 2022-04-05 | 东部超导科技（苏州）有限公司 | Method and device for quickly positioning critical current low point of superconducting strip |
| CN115267625A (en) * | 2022-08-03 | 2022-11-01 | 核工业西南物理研究院 | Continuous measurement device and method for critical current of superconducting cable in field |
| CN115267625B (en) * | 2022-08-03 | 2024-06-04 | 核工业西南物理研究院 | Device and method for continuously measuring field critical current of superconducting cable |
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