CN106597325B - Dynamic measuring device and measuring method for superconducting magnet at low temperature - Google Patents
Dynamic measuring device and measuring method for superconducting magnet at low temperature Download PDFInfo
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- CN106597325B CN106597325B CN201610980439.4A CN201610980439A CN106597325B CN 106597325 B CN106597325 B CN 106597325B CN 201610980439 A CN201610980439 A CN 201610980439A CN 106597325 B CN106597325 B CN 106597325B
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Abstract
The invention relates to the technical field of superconducting magnet testing equipment, in particular to a dynamic measuring device and a measuring method for a superconducting magnet at low temperature. The magnetic measuring device is characterized by comprising a measuring workbench and a magnetic measuring tool mechanism, wherein the measuring workbench comprises a chassis, an X-direction position adjusting mechanism, a Y-direction position adjusting mechanism and a Z-direction position adjusting mechanism are arranged on the chassis, a rotary driving motor is further arranged on the Z-direction position adjusting mechanism and connected with the upper end of a magnetic measuring rod through a coupler, the magnetic measuring rod penetrates through the lower end of a middle hole of the chassis and is arranged on the magnetic measuring tool mechanism, the magnetic measuring tool mechanism comprises an upper positioning disc and a lower positioning disc, a limiting block is correspondingly arranged at the upper end of the upper positioning disc, a locking ring is correspondingly arranged at the lower end of the lower positioning disc, and a rotary drum is arranged between the upper positioning disc and the lower positioning disc. The automatic test device has the advantages of high automation degree, convenient control, wide application range and reliable test; the control part is simple to realize, and the control part is a mature technology.
Description
Technical Field
The invention relates to the technical field of superconducting magnet testing equipment, in particular to a dynamic measuring device and a measuring method for a superconducting magnet at low temperature.
Background
Currently, there are two main ways to test known low temperature superconducting magnets: 1. directly soaking a low-temperature superconducting magnet in liquid helium, and fixing a Hall probe at a designated position of the superconducting magnet for fixed-point measurement; 2. a cryostat was individually provided for each superconducting magnet and measurements were made in a room temperature bore. The former method has the defect that less information can not be obtained by dynamic measurement; the latter approach requires that each superconducting magnet be self-contained with a cryostat, which is spatially limited if the bore diameter in the superconducting magnet is small, for measurement in a room temperature bore.
In addition, the geometric center of the superconducting magnet and the magnetic field center are not completely overlapped to a certain extent, because the magnetic field center and the mechanical center are inevitably not overlapped due to jumping turns, pre-tightening force and the like in the winding process of the superconducting magnet. Such as the FRIB project superconducting magnet of MSU (michigan state university, usa), requires a deviation of less than 0.3mm in the magnetic field center from the mechanical center. But if the deviation is too large, beam track distortion may occur. The deviation of the magnetic field center from the machine is determined by measurement and secondary processing is performed so that the magnetic field center of the superconducting magnet must be on the beam axis. The device can be used for dynamically measuring the magnetic field center and the axial magnetic field of the superconducting magnet along the axial line of the superconducting magnet in a small aperture of the superconducting magnet, and is a testing device which is free from the technical blank.
Disclosure of Invention
The invention aims to provide a dynamic measuring device and a measuring method for a superconducting magnet at low temperature, aiming at the defects of the prior art. Thereby effectively solving the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a superconducting magnet dynamic measurement device under low temperature, its characteristics are including measuring table and survey magnetism frock mechanism, measuring table include the chassis, be provided with X direction position adjustment mechanism, Y direction position adjustment mechanism and Z direction position adjustment mechanism on the chassis, still be provided with rotary driving motor on the Z direction position adjustment mechanism, rotary driving motor passes through the shaft coupling and links to each other with survey magnetism pole upper end, survey magnetism pole passes the centre bore lower extreme on chassis and installs on survey magnetism frock mechanism, survey magnetism frock mechanism include locating disk and lower locating disk, go up the locating disk upper end and be provided with the stopper correspondingly, lower locating disk lower extreme is provided with the locking ring correspondingly, is provided with rotatory drum between last locating disk and the lower locating disk.
The magnetic measuring rod is characterized in that a sealing mechanism is further arranged on the magnetic measuring rod, the sealing mechanism comprises a sealing seat, a spring is arranged in the sealing seat, a compression ring is correspondingly arranged above the spring, a sealing ring and an adjusting ring are arranged above the compression ring, a gland is arranged above the adjusting ring, and a compression screw and a locking screw are arranged on the gland. The magnetic measuring rod can not leak air when the magnetic measuring rod moves up and down and rotates in the sealing mechanism by adjusting the compression screw, the locking screw is used for locking the magnetic measuring rod, and the sealing mechanism also plays a certain role in guiding.
The magnetic measuring rod penetrates through the middle hole of the chassis, the middle hole of the sealing mechanism and the middle hole of the magnetic measuring tool mechanism, the axial columnar Hall probe and the radial lamellar Hall probe are mounted at the lower end of the magnetic measuring rod, and the axial columnar Hall probe and the radial lamellar Hall probe are led out from a lead outlet on the magnetic measuring rod through leads.
The X-direction position adjusting mechanism comprises an X-direction guide rail, an X-direction sliding block and an X-direction screw rod are correspondingly arranged on the X-direction guide rail, the outer end of the X-direction screw rod is connected with an X-direction hand wheel, and an X-direction locking mechanism is further arranged on the X-direction guide rail; the Y-direction position adjusting mechanism is arranged on the X-direction sliding block and comprises a Y-direction guide rail, the Y-direction guide rail is correspondingly provided with a Y-direction sliding block and a Y-direction screw rod, the outer end of the Y-direction screw rod is connected with a Y-direction hand wheel, and the Y-direction guide rail is also provided with a Y-direction locking mechanism; the Z-direction position adjusting mechanism is arranged on the Y-direction sliding block and comprises a Z-direction guide rail, the Z-direction guide rail is correspondingly provided with the Z-direction sliding block and a Z-direction screw rod, the upper end of the Z-direction screw rod is connected with a Z-direction motor, and the rotary driving motor is arranged on the Z-direction sliding block.
The chassis on still be provided with adjusting screw, adjusting screw sets up to four, the chassis is fixed on the top flange of test dewar through four adjusting screw, guarantees the distance and the depth of parallelism between chassis and the top flange through adjusting screw.
The rotary driving motor drives the magnet measuring rod to rotate along the direction C through the coupler, and the rotation angle range is 0-360 degrees; the X-direction position adjusting mechanism, the Y-direction position adjusting mechanism and the Z-direction position adjusting mechanism respectively realize the movement of the magnet measuring rod along the X direction, the Y direction and the Z direction; the movement adjusting range of the X-direction position adjusting mechanism is 1-150mm; the movement adjusting range of the Y-direction position adjusting mechanism is 1-50mm; the movement adjusting range of the Z-direction position adjusting mechanism is 0-850mm.
The lower end part of a magnetic measuring rod of the magnetic measuring tool mechanism is fixed with an axial columnar Hall probe for testing the axial magnetic field distribution when moving along the central axis, a lead is led out to the upper end through the inside of the magnetic measuring rod and sealed, the magnetic measuring rod is made of an aluminum alloy material, the straightness is calibrated before processing, and the magnetic measuring rod is marked with scale values; the straightness of the rotary drum is 0.05mm, the cylindricity is 0.02mm, a gap of 0.02-0.04mm is arranged between the rotary drum and the upper and lower positioning disks, a circumferential wire groove and an axial wire groove are arranged on the rotary drum, the circumferential wire groove is used for fixing a radial flaky Hall probe, one flaky Hall probe is respectively and vertically symmetrically fixed along the central section of the superconducting magnet, and the axial wire groove is used for probe wiring; the rotary cylinder is fixed at the end part of the superconducting magnet to be measured through the pin hole, the gap between the magnet measuring rod and the rotary cylinder is 0.02-0.06mm, the magnet measuring rod is ensured to move freely in the rotary cylinder along the axial direction, and meanwhile, the rotary cylinder has a guiding function on the magnet measuring rod; the magnetic measuring rod boss is contacted with the groove of the rotating cylinder, and the motor is driven to rotate by the C direction magnetic measuring rod so as to drive the rotating cylinder to rotate to realize radial magnetic field measurement.
The device for dynamically measuring the magnetic field distribution of the superconducting magnet at low temperature is matched with a test Dewar, and the method for dynamically measuring the magnetic field distribution of the superconducting magnet at low temperature comprises the following steps:
the first step: fixing an axial columnar Hall probe at the lower end part of a magnet measuring rod, leading a lead wire of the axial columnar Hall probe out of a lead wire outlet at a side surface open pore of the upper end part of the magnet measuring rod along an inner hole of the magnet measuring rod, and sealing the lead wire outlet by using low-temperature glue; the sealing mechanism is arranged on the magnet measuring rod according to the structural sequence;
and a second step of: the radial flaky Hall probe is fixed on a circumferential groove formed in a rotary drum by using a low-temperature adhesive tape, the positions of the radial flaky Hall probe are symmetrical relative to the central plane of a superconducting magnet to be tested, a lead wire is led out along the axial groove, and the glass fiber adhesive tape is fixed, so that the lead wire is prevented from being wrapped out when the rotary drum rotates, and meanwhile, the lead wire is pre-wound for a plurality of circles at the upper end of the rotary drum;
and a third step of: the upper positioning disc and the lower positioning disc are fixed at two ends of the superconducting magnet through pins, the rotating cylinder sequentially penetrates through the limiting block, the upper positioning disc, the central hole of the superconducting magnet and the lower positioning disc, and the part of the rotating cylinder protruding out of the lower positioning disc is locked through a locking ring, so that the rotating cylinder is only allowed to rotate along the C direction and is not allowed to move along the Z direction; ensuring that the central axis of the rotary cylinder coincides with the geometric central line of the inner hole of the superconducting magnet and that the central axis of the rotary cylinder is vertical to the end face of the magnet;
fourth step: the superconducting magnet is hung on a suspension G10 plate through a pull rod, the superconducting magnet is adjusted to a proper position, the center of the superconducting magnet is ensured to be concentric with a KF40 interface which is arranged on a top flange of a test Dewar in advance, and the end face of the superconducting magnet is parallel to the end face of the top flange;
fifth step: after the sealing mechanism and the magnet measuring rod are assembled, the sealing mechanism is fixed on the KF40 interface, the magnet measuring rod passes through the limiting block and moves downwards, passes through the central hole with the groove of the rotary cylinder, the scale and the direction marked on the magnet measuring rod are observed, the position and the direction of the central axis required to be measured are moved by the magnet measuring rod, and the magnet measuring rod is locked by the screw on the limiting block;
sixth step: the measuring workbench is installed, four adjusting screws at the bottom of the measuring workbench are installed on a top flange of the test Dewar, and the adjustable screws are adjusted to enable the bottom disc surface to be parallel to the end face of the top flange; the center of a Z-direction motor shaft is overlapped with the center of the magnet measuring rod through adjusting an X-direction hand wheel and a Y-direction hand wheel, a locking screw of a sealing structure is locked, and a manual control downward movement rotation driving motor is connected with the upper end part of the magnet measuring rod through a coupler; after the connection is completed, loosening a locking screw of the sealing structure, and tightening a compression screw to ensure sealing;
seventh step: cooling with liquid nitrogen, keeping for a period of time after the superconducting magnet is cooled completely when the superconducting magnet is cooled down to the liquid nitrogen temperature, and discharging the residual liquid nitrogen in the Dewar through a liquid delivery pipe by filling helium into the outside, and simultaneously heating with a heater arranged in the Dewar to ensure that the liquid nitrogen is completely discharged and stop heating; cooling with liquid helium, and monitoring the temperature and liquid level in the whole process when the superconducting magnet is cooled to the liquid helium temperature and kept for a period of time;
eighth step: starting excitation and power-up of the superconducting magnet through a current lead according to a preset power-up rate, and stabilizing current after the current is added to a specified current value;
ninth step: when the magnetic field is measured, the control part controls the rotary driving motor C to rotate in the opposite direction to the pre-winding direction of the lead wire, the magnetic field values of the upper and lower sheet Hall probes of the rotary cylinder are recorded every 30 DEG, the test is repeated for several times, the magnetic field values are recorded, and the deviation value of the magnetic field center and the mechanical center is obtained through calculation;
tenth step: when the magnetic field is measured, the control part controls the Z-direction motor to move upwards, the axial magnetic field value is recorded every 10mm, the magnetic measuring rod is moved up and down, the test is repeated for several times, and the magnetic field value when the axial magnetic field moves along the central axis is recorded.
The beneficial effects of the invention are as follows: according to the device and the method for dynamically measuring the superconducting magnet at the low temperature, the superconducting magnet is dynamically subjected to magnetic field measurement at the low temperature, and more information is acquired in the test process, so that the test time and the test cost are saved; the automatic test device has the advantages of high automation degree, convenient control, wide application range and reliable test; the control part is simple to realize, and the control part is a mature technology.
Description of the drawings:
FIG. 1 is a schematic illustration of an axially measured structure of the present invention;
FIG. 2 is a schematic view of the structure of the measuring table of the present invention;
FIG. 3 is a schematic cross-sectional view of a magnet measuring bar of the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3 according to the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 3 at II in accordance with the present invention;
FIG. 6 is a schematic cross-sectional view of a seal of the present invention;
FIG. 7 is a schematic diagram of a magnetic measurement tool according to the present invention;
FIG. 8 is a schematic cross-sectional view of the structure of FIG. 7 at A-A in accordance with the present invention;
FIG. 9 is a schematic diagram of a test set-up example of the present invention.
The figure shows: an X-direction hand wheel; x-direction screw rod; 3.X to a locking mechanism; x-direction guide rail; x-direction sliding block; 6.Y to a locking mechanism; 7.Y to the hand wheel; 8.Y to the guide rail; 9.Y to the lead screw; y-direction sliding block; z-direction lead screw; a z-motor; z-directed rails; z-direction slide block; 15. a rotary drive motor; 16. a coupling; 17. a chassis; 18. adjusting a screw; 19. a sealing seat; 20. a spring; 21. a compression ring; 22. a seal ring; 23. an adjusting ring; 24. a gland; 25. a compression screw; 26. a locking screw; 27. a magnetic measuring rod; 27-1, a radial lamellar Hall probe; 27-2, an axial columnar Hall probe; 27-3, leading wires; 27-4, a lead outlet; 28. a limiting block; 29. an upper positioning disk; 30. a rotary drum; 31. a lower positioning disc; 32. a locking ring; 33. testing Dewar; 34. an infusion tube; 35. a top flange; kf40 interface; 37. a measuring table; 38. a sealing mechanism; 39. a current lead; 40. suspending the G10 plate; 41. a magnetism measurement tool mechanism; 42. a pull rod; 43. a superconducting magnet; 44. a heater; 45. and a sealing mechanism.
Detailed Description
The following is a further detailed description of the best mode examples illustrated in the accompanying drawings:
as shown in fig. 1 to 8, the dynamic measuring device for the superconducting magnet at low temperature is characterized by comprising a measuring workbench 37 and a magnetic measuring tool mechanism 41, wherein the measuring workbench 37 comprises a chassis 17, an X-direction position adjusting mechanism, a Y-direction position adjusting mechanism and a Z-direction position adjusting mechanism are arranged on the chassis 17, a rotary driving motor 15 is further arranged on the Z-direction position adjusting mechanism, the rotary driving motor 15 is connected with the upper end of a magnetic measuring rod 27 through a coupler 16, the magnetic measuring rod 27 penetrates through the lower end of a middle hole of the chassis 17 and is mounted on the magnetic measuring tool mechanism 41, the magnetic measuring tool mechanism 41 comprises an upper positioning disc 29 and a lower positioning disc 31, a limiting block 28 is correspondingly arranged at the upper end of the upper positioning disc 29, a locking ring 32 is correspondingly arranged at the lower end of the lower positioning disc 31, and a rotary cylinder 30 is arranged between the upper positioning disc 29 and the lower positioning disc 31.
The magnetic measuring rod 27 is further provided with a sealing mechanism 38, the sealing mechanism 38 comprises a sealing seat 19, a spring 20 is arranged in the sealing seat 19, a compression ring 21 is correspondingly arranged above the spring 20, a sealing ring 22 and an adjusting ring 23 are arranged above the compression ring 21, a pressing cover 24 is arranged above the adjusting ring 23, and a pressing screw 25 and a locking screw 26 are arranged on the pressing cover 24. The pressing screw 25 is adjusted to prevent the magnetic measuring rod 27 from leaking air when the magnetic measuring rod 27 moves up and down and rotates in the sealing mechanism 38, the locking screw 26 is used for locking the magnetic measuring rod 27, and the sealing mechanism 38 also plays a role in guiding. The sealing mechanism 38 also serves as a guide to ensure that the magnet bar 27 is concentric with the rotary drive motor shaft, and the sealing mechanism 38 is secured to the top flange 35 of the pre-opened KF40 interface 36 of the test dewar 33.
The magnetic measuring rod 27 penetrates through the middle hole of the chassis 17, the middle hole of the sealing mechanism 38 and the middle hole of the magnetic measuring tool mechanism 41, the axial columnar Hall probe 27-2 and the radial lamellar Hall probe 27-1 are mounted at the lower end of the magnetic measuring rod 27, and the axial columnar Hall probe 27-2 and the radial lamellar Hall probe 27-1 are led out from a lead outlet 27-4 on the magnetic measuring rod 27 through a lead 27-3.
The X-direction position adjusting mechanism comprises an X-direction guide rail 4, an X-direction sliding block 5 and an X-direction screw rod 2 are correspondingly arranged on the X-direction guide rail 4, the outer end of the X-direction screw rod 2 is connected with an X-direction hand wheel 1, and an X-direction locking mechanism 3 is further arranged on the X-direction guide rail 4; the Y-direction position adjusting mechanism is arranged on the X-direction sliding block 5 and comprises a Y-direction guide rail 8, a Y-direction sliding block 10 and a Y-direction lead screw 9 are correspondingly arranged on the Y-direction guide rail 8, the outer end of the Y-direction lead screw 9 is connected with a Y-direction hand wheel 7, and a Y-direction locking mechanism 6 is also arranged on the Y-direction guide rail 8; the Z-direction position adjusting mechanism is arranged on the Y-direction sliding block 10 and comprises a Z-direction guide rail 13, a Z-direction sliding block 14 and a Z-direction lead screw 11 are correspondingly arranged on the Z-direction guide rail 13, the upper end of the Z-direction lead screw 11 is connected with a Z-direction motor 12, and a rotary driving motor 15 is arranged on the Z-direction sliding block.
The chassis 17 is also provided with four adjusting screws 18, the chassis 17 is fixed on the top flange 35 of the test dewar 33 through the four adjusting screws, and the distance and parallelism between the chassis 17 and the top flange 35 are ensured through adjusting the adjusting screws 18.
The rotary driving motor 15 drives the magnet measuring rod 27 to rotate along the direction C through the coupler 16, and the rotation angle range is 0-360 degrees; the X-direction position adjusting mechanism, the Y-direction position adjusting mechanism and the Z-direction position adjusting mechanism respectively realize the movement of the magnet measuring rod 27 along the X direction, the Y direction and the Z direction; the movement adjusting range of the X-direction position adjusting mechanism is 1-150mm; the movement adjusting range of the Y-direction position adjusting mechanism is 1-50mm; the movement adjusting range of the Z-direction position adjusting mechanism is 0-850mm.
The lower end part of a magnetic measuring rod 27 of the magnetic measuring tool mechanism 41 is fixed with an axial columnar Hall probe 27-2 for testing the axial magnetic field distribution when moving along the central axis, a lead wire is led out to the upper end through the inside of the magnetic measuring rod 27 and is sealed, the magnetic measuring rod 27 is made of an aluminum alloy material, the alignment straightness before processing is 0.01%, and the magnetic measuring rod 27 is marked with scale values; the straightness of the rotary cylinder 30 is 0.05mm, the cylindricity is 0.02mm, a gap of 0.02-0.04mm is arranged between the rotary cylinder 30 and the upper positioning disk 29 and the lower positioning disk 31, a circumferential wire groove and an axial wire groove are arranged on the rotary cylinder 30, the circumferential wire groove is used for fixing the radial flaky Hall probe 27-1, one flaky Hall probe is respectively and vertically symmetrically fixed along the central section of the superconducting magnet, and the axial wire groove is used for probe wiring; the rotary cylinder 30 is fixed at the end part of the superconducting magnet 43 to be measured through a pin hole, the gap between the magnet measuring rod 27 and the rotary cylinder 30 is 0.02-0.06mm, the magnet measuring rod 27 is ensured to move freely in the rotary cylinder 30 along the axial direction, and meanwhile, the rotary cylinder 30 has a guiding function on the magnet measuring rod 27; the magnetic measuring rod boss is contacted with the groove of the rotating cylinder, and the motor is driven to rotate by the C direction magnetic measuring rod so as to drive the rotating cylinder to rotate to realize radial magnetic field measurement.
As shown in fig. 9, the method for dynamically measuring the magnetic field distribution of the superconducting magnet at a low temperature by being matched with the test dewar 33 comprises the following steps:
the first step: fixing an axial columnar Hall probe 27-2 at the lower end part of a magnet measuring rod 27, leading a lead 27-3 of the axial columnar Hall probe out of a lead outlet 27-4 at a side surface open hole of the upper end part of the magnet measuring rod along an inner hole of the magnet measuring rod 27, and sealing the lead outlet by using low-temperature glue; mounting the sealing mechanism 38 on the magnet bar 27 in structural order;
and a second step of: the radial flaky Hall probe 27-1 is fixed on a circumferential groove formed in the rotary drum 30 by a low-temperature adhesive tape, the positions of the radial flaky Hall probe are symmetrical relative to the central plane of a superconducting magnet to be tested, one lead is led out along the axial groove, and the glass fiber adhesive tape is fixed, so that the lead is prevented from being wrapped out when the rotary drum rotates, and meanwhile, the lead is pre-wound for a plurality of circles at the upper end of the rotary drum;
and a third step of: the upper positioning disc 29 and the lower positioning disc 31 are fixed at two ends of the superconducting magnet 43 by pins, the rotating cylinder 30 sequentially passes through the limiting block 28, the upper positioning disc 29, the central hole of the superconducting magnet 43, the lower positioning disc 31 and the part of the rotating cylinder 30 protruding out of the lower positioning disc 31 are locked by the locking ring 32, and only the rotating cylinder 30 is allowed to rotate along the C direction and is not allowed to move along the Z direction; ensuring that the central axis of the rotary cylinder 30 coincides with the geometric central line of the inner hole of the superconducting magnet 43 and ensuring that the central axis of the rotary cylinder 30 is vertical to the end face of the magnet;
fourth step: the superconducting magnet 43 is hung on the hanging G10 plate 40 through the pull rod 42, the superconducting magnet 43 is adjusted to a proper position, the center of the superconducting magnet 43 is ensured to be concentric with the KF40 interface 36 which is arranged on the top flange 35 of the test Dewar 33 in advance, and the end face of the superconducting magnet 43 is parallel to the end face of the top flange 35;
fifth step: after the sealing mechanism 38 and the magnetic measuring rod 27 are assembled, the sealing mechanism 38 is fixed on the KF40 interface 36, the magnetic measuring rod 27 passes through the limiting block 28 and moves downwards, passes through the central hole with the groove of the rotary cylinder 30, scales and directions marked on the magnetic measuring rod 27 are observed, the magnetic measuring rod 27 moves to the position and the direction of the central axis required to be measured, and the magnetic measuring rod 27 is locked by a screw on the limiting block 28;
sixth step: the measuring workbench 37 is installed, four adjusting screws at the bottom of the measuring workbench are installed on the top flange 35 of the test Dewar 33, and the adjusting screws are adjusted to enable the bottom disc surface to be parallel to the end surface of the top flange 35; the center of the shaft of the Z-direction motor 12 is overlapped with the center of the magnetic measuring rod by adjusting the X-direction hand wheel 1 and the Y-direction hand wheel 7, a locking screw 26 of a sealing structure is locked, and the manual control downward movement rotary driving motor 15 is connected with the upper end part of the magnetic measuring rod 27 through a coupler 16; after the connection is completed, the locking screw 26 of the sealing structure is loosened, the compression screw 25 is screwed down, and the sealing is ensured;
seventh step: cooling with liquid nitrogen, maintaining for a period of time after the superconducting magnet 43 is cooled completely when the superconducting magnet 43 is cooled down to the liquid nitrogen temperature, and externally charging helium gas to discharge residual liquid nitrogen in the Dewar through the infusion tube 34, and simultaneously heating with a heater 44 arranged in the Dewar to ensure that the liquid nitrogen is completely discharged and stop heating; cooling with liquid helium, and monitoring the temperature and the liquid level in the whole process when the superconducting magnet 43 is wholly cooled to the liquid helium temperature and kept for a period of time;
eighth step: starting excitation energization of the superconducting magnet 43 at a predetermined energization rate through the current lead 39, and stabilizing the current after the energization to a prescribed current value;
ninth step: when the magnetic field is measured, the control part controls the rotary driving motor C to rotate in the opposite direction to the pre-winding direction of the lead wire, the magnetic field values of the upper and lower sheet Hall probes of the rotary drum 30 are recorded every 30 DEG, the test is repeated for several times, the magnetic field values are recorded, and the deviation value of the magnetic field center and the mechanical center is obtained through calculation;
tenth step: when the magnetic field is measured, the control part controls the Z-direction motor to move upwards, the axial magnetic field value is recorded every 10mm, the magnetic measuring rod is moved up and down, the test is repeated for several times, and the magnetic field value when the axial magnetic field moves along the central axis is recorded.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The utility model provides a superconducting magnet dynamic measurement device under low temperature, its characterized in that includes measuring table and survey magnetism frock mechanism, measuring table include the chassis, be provided with X direction position adjustment mechanism, Y direction position adjustment mechanism and Z direction position adjustment mechanism on the chassis, still be provided with rotary driving motor on the Z direction position adjustment mechanism, rotary driving motor passes through the shaft coupling and links to each other with survey magnetism pole upper end, survey magnetism pole passes the centre bore lower extreme of chassis and installs on survey magnetism frock mechanism, survey magnetism frock mechanism include upper positioning disk and lower positioning disk, upper positioning disk upper end is provided with the stopper correspondingly, lower positioning disk lower extreme is provided with the locking ring correspondingly, is provided with the rotary drum between upper positioning disk and the lower positioning disk; the lower end part of a magnetic measuring rod of the magnetic measuring tool mechanism is fixed with an axial columnar Hall probe for testing the axial magnetic field distribution when moving along the central axis, a lead is led out to the upper end through the inside of the magnetic measuring rod and sealed, the magnetic measuring rod is made of an aluminum alloy material, the straightness is calibrated before processing, and the magnetic measuring rod is marked with scale values; the straightness of the rotary drum is 0.05mm, the cylindricity is 0.02mm, a gap of 0.02-0.04mm is arranged between the rotary drum and the upper and lower positioning disks, a circumferential wire groove and an axial wire groove are arranged on the rotary drum, the circumferential wire groove is used for fixing a radial flaky Hall probe, one flaky Hall probe is respectively and vertically symmetrically fixed along the central section of the superconducting magnet, and the axial wire groove is used for wiring the probe; the rotary cylinder is fixed at the end part of the superconducting magnet to be measured through the pin hole, the gap between the magnet measuring rod and the rotary cylinder is 0.02-0.06mm, the magnet measuring rod is ensured to move freely in the rotary cylinder along the axial direction, and meanwhile, the rotary cylinder has a guiding function on the magnet measuring rod; the magnetic measuring rod boss is contacted with the groove of the rotating cylinder, and the motor is driven to rotate by the C direction magnetic measuring rod so as to drive the rotating cylinder to rotate to realize radial magnetic field measurement.
2. A dynamic measurement apparatus for a superconducting magnet at low temperature as claimed in claim 1, wherein: the magnetic measuring rod is characterized in that a sealing mechanism is further arranged on the magnetic measuring rod, the sealing mechanism comprises a sealing seat, a spring is arranged in the sealing seat, a compression ring is correspondingly arranged above the spring, a sealing ring and an adjusting ring are arranged above the compression ring, a gland is arranged above the adjusting ring, and a compression screw and a locking screw are arranged on the gland.
3. A dynamic measurement apparatus for a superconducting magnet at low temperature as claimed in claim 2, wherein: the magnetic measuring rod penetrates through the middle hole of the chassis, the middle hole of the sealing mechanism and the middle hole of the magnetic measuring tool mechanism, the axial columnar Hall probe and the radial lamellar Hall probe are mounted at the lower end of the magnetic measuring rod, and the axial columnar Hall probe and the radial lamellar Hall probe are led out from a lead outlet on the magnetic measuring rod through leads.
4. A dynamic measurement apparatus for a superconducting magnet at low temperature as claimed in claim 1, wherein: the X-direction position adjusting mechanism comprises an X-direction guide rail, an X-direction sliding block and an X-direction screw rod are correspondingly arranged on the X-direction guide rail, the outer end of the X-direction screw rod is connected with an X-direction hand wheel, and an X-direction locking mechanism is further arranged on the X-direction guide rail; the Y-direction position adjusting mechanism is arranged on the X-direction sliding block and comprises a Y-direction guide rail, the Y-direction guide rail is correspondingly provided with a Y-direction sliding block and a Y-direction screw rod, the outer end of the Y-direction screw rod is connected with a Y-direction hand wheel, and the Y-direction guide rail is also provided with a Y-direction locking mechanism; the Z-direction position adjusting mechanism is arranged on the Y-direction sliding block and comprises a Z-direction guide rail, the Z-direction guide rail is correspondingly provided with the Z-direction sliding block and a Z-direction screw rod, the upper end of the Z-direction screw rod is connected with a Z-direction motor, and the rotary driving motor is arranged on the Z-direction sliding block.
5. A dynamic measurement apparatus for a superconducting magnet at low temperature as claimed in claim 1, wherein: the chassis on still be provided with adjusting screw, adjusting screw sets up to four, the chassis is fixed on the top flange of test dewar through four adjusting screw, guarantees the distance and the depth of parallelism between chassis and the top flange through adjusting screw.
6. A dynamic measurement apparatus for a superconducting magnet at low temperature as claimed in claim 4, wherein: the rotary driving motor drives the magnet measuring rod to rotate along the direction C through the coupler, and the rotation angle range is 0-360 degrees; the X-direction position adjusting mechanism, the Y-direction position adjusting mechanism and the Z-direction position adjusting mechanism respectively realize the movement of the magnet measuring rod along the X direction, the Y direction and the Z direction; the movement adjusting range of the X-direction position adjusting mechanism is 1-150mm; the movement adjusting range of the Y-direction position adjusting mechanism is 1-50mm; the movement adjusting range of the Z-direction position adjusting mechanism is 0-850mm.
7. A method for dynamically measuring the magnetic field distribution of a superconducting magnet at a low temperature by using the dynamic measuring device for a superconducting magnet at a low temperature according to any one of claims 1 to 6, comprising the steps of:
the first step: fixing an axial columnar Hall probe at the lower end part of a magnet measuring rod, leading a lead wire of the axial columnar Hall probe out of a lead wire outlet at a side surface open pore of the upper end part of the magnet measuring rod along an inner hole of the magnet measuring rod, and sealing the lead wire outlet by using low-temperature glue; the sealing mechanism is arranged on the magnet measuring rod according to the structural sequence;
and a second step of: the radial flaky Hall probe is fixed on a circumferential groove formed in a rotary drum by using a low-temperature adhesive tape, the positions of the radial flaky Hall probe are symmetrical relative to the central plane of a superconducting magnet to be tested, a lead wire is led out along the axial groove, and the glass fiber adhesive tape is fixed, so that the lead wire is prevented from being wrapped out when the rotary drum rotates, and meanwhile, the lead wire is pre-wound for a plurality of circles at the upper end of the rotary drum;
and a third step of: the upper positioning disc and the lower positioning disc are fixed at two ends of the superconducting magnet through pins, the rotating cylinder sequentially penetrates through the limiting block, the upper positioning disc, the central hole of the superconducting magnet and the lower positioning disc, and the part of the rotating cylinder protruding out of the lower positioning disc is locked through a locking ring, so that the rotating cylinder is only allowed to rotate along the C direction and is not allowed to move along the Z direction; ensuring that the central axis of the rotary cylinder coincides with the geometric central line of the inner hole of the superconducting magnet and that the central axis of the rotary cylinder is vertical to the end face of the magnet;
fourth step: the superconducting magnet is hung on a suspension G10 plate through a pull rod, the superconducting magnet is adjusted to a proper position, the center of the superconducting magnet is ensured to be concentric with a KF40 interface which is arranged on a top flange of a test Dewar in advance, and the end face of the superconducting magnet is parallel to the end face of the top flange;
fifth step: after the sealing mechanism and the magnet measuring rod are assembled, the sealing mechanism is fixed on the KF40 interface, the magnet measuring rod passes through the limiting block and moves downwards, passes through the central hole with the groove of the rotary cylinder, the scale and the direction marked on the magnet measuring rod are observed, the position and the direction of the central axis required to be measured are moved by the magnet measuring rod, and the magnet measuring rod is locked by the screw on the limiting block;
sixth step: the measuring workbench is installed, four adjusting screws at the bottom of the measuring workbench are installed on a top flange of the test Dewar, and the adjustable screws are adjusted to enable the bottom disc surface to be parallel to the end face of the top flange; the center of a Z-direction motor shaft is overlapped with the center of the magnet measuring rod through adjusting an X-direction hand wheel and a Y-direction hand wheel, a locking screw of a sealing structure is locked, and a manual control downward movement rotation driving motor is connected with the upper end part of the magnet measuring rod through a coupler; after the connection is completed, loosening a locking screw of the sealing structure, and tightening a compression screw to ensure sealing;
seventh step: cooling with liquid nitrogen, keeping for a period of time after the superconducting magnet is cooled completely when the superconducting magnet is cooled down to the liquid nitrogen temperature, and discharging the residual liquid nitrogen in the Dewar through a liquid delivery pipe by filling helium into the outside, and simultaneously heating with a heater arranged in the Dewar to ensure that the liquid nitrogen is completely discharged and stop heating; cooling with liquid helium, and monitoring the temperature and liquid level in the whole process when the superconducting magnet is cooled to the liquid helium temperature and kept for a period of time;
eighth step: starting excitation and power-up of the superconducting magnet through a current lead according to a preset power-up rate, and stabilizing current after the current is added to a specified current value;
ninth step: when the magnetic field is measured, the control part controls the rotary driving motor C to rotate in the opposite direction to the pre-winding direction of the lead, the rotating cylinder rotates for 30 degrees each time, the magnetic field values of the upper and lower sheet Hall probes of the rotating cylinder are recorded, the test is repeated for several times, the magnetic field values are recorded, and the deviation value of the magnetic field center and the mechanical center is obtained through calculation;
tenth step: when the magnetic field is measured, the control part controls the Z-direction motor to move upwards, the axial magnetic field value is recorded every 10mm, the magnetic measuring rod is moved up and down, the test is repeated for several times, and the magnetic field value when the axial magnetic field moves along the central axis is recorded.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1048958A2 (en) * | 1999-04-30 | 2000-11-02 | Sumitomo Special Metals Company Limited | Magnetic sensor and manufacturing method thereof |
| CN1584622A (en) * | 2004-06-04 | 2005-02-23 | 南京工业大学 | Three-dimensional space magnetic force and magnetic field distribution testing device based on motion control |
| CN101206250A (en) * | 2006-12-20 | 2008-06-25 | 贺利氏有限公司 | Apparatus for a magnetic field detector holding assembly for a pass-through flux (ptf) measurement stand |
| JP2008261800A (en) * | 2007-04-13 | 2008-10-30 | Dmt:Kk | Magnetic detection apparatus and magnetic detection method |
| CN201184910Y (en) * | 2008-03-28 | 2009-01-21 | 上海北玻镀膜技术工业有限公司 | Test system for space magnetic field |
| CN201322791Y (en) * | 2008-12-23 | 2009-10-07 | 中国科学院电工研究所 | Device for measuring magnetic field distribution of superconducting magnet |
| CN102103192A (en) * | 2010-11-22 | 2011-06-22 | 沈阳工业大学 | Automatic positioning measuring device for one-way magnetic fields |
| JP2011185865A (en) * | 2010-03-10 | 2011-09-22 | Alps Electric Co Ltd | Magnetic field detector |
| CN102998633A (en) * | 2012-12-12 | 2013-03-27 | 中国科学院高能物理研究所 | Magnetic field measurement device of magnetic resonance imaging superconducting magnet central area |
| CN103777152A (en) * | 2014-02-19 | 2014-05-07 | 清华大学 | Alternating magnetic field three-dimensional distribution measuring device |
| CN104198964A (en) * | 2014-09-03 | 2014-12-10 | 华中科技大学 | Measurement device for magnetic field distribution of superconducting magnet |
| CN204855765U (en) * | 2015-06-01 | 2015-12-09 | 苏州市东泰磁业有限公司 | Smallclothes magnet surface field measures frock |
| CN205120939U (en) * | 2015-11-09 | 2016-03-30 | 西安聚能超导磁体科技有限公司 | A device for measuring superconducting magnet magnetic field |
| CN105527590A (en) * | 2014-10-21 | 2016-04-27 | 核工业西南物理研究院 | Support used for measuring magnetic field distribution of magnet |
| CN206223951U (en) * | 2016-11-08 | 2017-06-06 | 中国科学院近代物理研究所 | Superconducting magnet dynamic measurement device under a kind of low temperature |
-
2016
- 2016-11-08 CN CN201610980439.4A patent/CN106597325B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1048958A2 (en) * | 1999-04-30 | 2000-11-02 | Sumitomo Special Metals Company Limited | Magnetic sensor and manufacturing method thereof |
| CN1584622A (en) * | 2004-06-04 | 2005-02-23 | 南京工业大学 | Three-dimensional space magnetic force and magnetic field distribution testing device based on motion control |
| CN101206250A (en) * | 2006-12-20 | 2008-06-25 | 贺利氏有限公司 | Apparatus for a magnetic field detector holding assembly for a pass-through flux (ptf) measurement stand |
| JP2008261800A (en) * | 2007-04-13 | 2008-10-30 | Dmt:Kk | Magnetic detection apparatus and magnetic detection method |
| CN201184910Y (en) * | 2008-03-28 | 2009-01-21 | 上海北玻镀膜技术工业有限公司 | Test system for space magnetic field |
| CN201322791Y (en) * | 2008-12-23 | 2009-10-07 | 中国科学院电工研究所 | Device for measuring magnetic field distribution of superconducting magnet |
| JP2011185865A (en) * | 2010-03-10 | 2011-09-22 | Alps Electric Co Ltd | Magnetic field detector |
| CN102103192A (en) * | 2010-11-22 | 2011-06-22 | 沈阳工业大学 | Automatic positioning measuring device for one-way magnetic fields |
| CN102998633A (en) * | 2012-12-12 | 2013-03-27 | 中国科学院高能物理研究所 | Magnetic field measurement device of magnetic resonance imaging superconducting magnet central area |
| CN103777152A (en) * | 2014-02-19 | 2014-05-07 | 清华大学 | Alternating magnetic field three-dimensional distribution measuring device |
| CN104198964A (en) * | 2014-09-03 | 2014-12-10 | 华中科技大学 | Measurement device for magnetic field distribution of superconducting magnet |
| CN105527590A (en) * | 2014-10-21 | 2016-04-27 | 核工业西南物理研究院 | Support used for measuring magnetic field distribution of magnet |
| CN204855765U (en) * | 2015-06-01 | 2015-12-09 | 苏州市东泰磁业有限公司 | Smallclothes magnet surface field measures frock |
| CN205120939U (en) * | 2015-11-09 | 2016-03-30 | 西安聚能超导磁体科技有限公司 | A device for measuring superconducting magnet magnetic field |
| CN206223951U (en) * | 2016-11-08 | 2017-06-06 | 中国科学院近代物理研究所 | Superconducting magnet dynamic measurement device under a kind of low temperature |
Non-Patent Citations (2)
| Title |
|---|
| 何源 等.兰州重离子加速器冷却储存环磁场测量系统.《原子能科学技术》.2005,第39卷(第3期),第257-262页. * |
| 谢敏.PZT/CFO层状电磁薄膜材料制备及其力电磁性能鼓包测试表征.《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》.2016,(第4期),第B020-265页. * |
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