CN201322791Y - Device for measuring magnetic field distribution of superconducting magnet - Google Patents
Device for measuring magnetic field distribution of superconducting magnet Download PDFInfo
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- CN201322791Y CN201322791Y CNU2008201245449U CN200820124544U CN201322791Y CN 201322791 Y CN201322791 Y CN 201322791Y CN U2008201245449 U CNU2008201245449 U CN U2008201245449U CN 200820124544 U CN200820124544 U CN 200820124544U CN 201322791 Y CN201322791 Y CN 201322791Y
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Abstract
A device used for measuring the magnetic field distribution of a superconducting magnet comprises a measuring rod (1), a locking clamp (2), a guide sleeve (3), a mounting plate (4), an XY translation stage (5), a rotating stage (6), a converter plate (7) and a probe clamp 8). The rotating stage (6) is mounted on the converter plate (7); the XY translation stage (5) is mounted on the rotating stage (6); the mounting plate (4) is fixed on the XY translation stage (5); the guide sleeve (3) is fixed on the mounting plate (4); the locking clamp (2) is mounted on the end surface of the guide sleeve (3); the measuring rod (1) passes through a hole of the locking clamp (2) to as to be inserted into the inner hole of the guide sleeve (3), and the rod passes through the XY translation stage (5), the rotating stage (6) and the converter plate (7) at the same time; and the probe clamp (8) is mounted at the lower end part of the measuring rod (1). Through adjusting a knob of the mechanism, the measuring probe can be translated in X, Y and Z directions and can be rotated 360 degrees around the Z axle, thereby measuring the magnetic field at an arbitrary point in the ambient temperature hole of the superconducting magnet.
Description
Technical field
The utility model relates to a kind of superconducting magnet Distribution of Magnetic Field measurement mechanism that is used for, particularly superconducting magnet room temperature hole internal magnetic field apparatus for measuring distribution.
Background technology
A major issue that faces in the superconducting magnet magnetic-field measurement is that the gaussmeter probe is difficult to the location, magnetic-field measurement value and accurate volume coordinate can't be mapped.In some magnetic-field measurements, the accurate orientation problem of volume coordinate point is most important for measurement result.As gyrotron microwave magnet, the magnetic axis bearing accuracy of requirement is less than 0.2mm, if the magnetic axis deviation is too big, can causes the microbeam deviation even burn microwave tube.Therefore, need accurate measurement and positioning measurement device superconducting magnet Distribution of Magnetic Field.
1986, the Teng Ruilin of Harbin electrical instrument institute etc. was developed into CG6 type nuclear magnetic resonance robot scaling equipment.System controlled by computer, three-dimensional measurement superconduction kicker magnet internal magnetic field distributes, and adopts micro-stepping motors, 60000 steps/360 degree.But micro-stepping motors is a ferromagnetic element, can change the magnetic field bit-type in tested zone, influences measuring accuracy.And superconducting magnet all is single-piece production, and Dewar is different, and this instrument also can't satisfy the requirement of measuring versatility.Propositions such as the Chen pioneer of robotization institute of Nanjing University of Technology in 2003 utilize the 3 d-space field and the magnetic force test macro of AC servo control, and this system adopts the AC servo machinery driving ball-screw to realize automatic measurement.Obviously, AC servo motor and ball-screw itself are ferromagnetic elements, can introduce magnetic field error.This system realizes and complicated operation, is unfavorable in the on-the-spot use of superconducting magnet debugging.One product magnetic industry company limited three-dimensional magnetic field distribution automatic measuring equipment lays particular emphasis on the improvement of magnetic field value measuring accuracy and adopts the automatic measurement means.The magnetic field step measurement instrument that Harbin reaches Electronics Co., Ltd. earlier is mainly used in permanent magnetism magnetic spare Surface field and measures.These magnetic-field measurement products all do not relate to superconducting magnet magnetic field and accurately measure.
External close measurement mechanism mainly is the magnetic-field-measuring device that is used for Magnetic resonance imaging, is used to measure uniformity coefficient and gradient.US2004254449 (A1) " System for concurrent MRIimaging and magnetic field homogeneitymeasurement " is mainly used to measure the uniformity coefficient in MRI magnetic field.JP4276236 (A) " TIME CHANGEMEASUREMENT METHOD FOR GRADIENT MAGNETIC FIELD OF MRIDEVICE " measures the changes of magnetic field and the gradient of MRI device.
The locating device that is used to measure, for example scientific instrument, electron microscope, electron probe etc. are gone up sample stage, work stage commonly used, often use the translating device and the universal stage of X, two directions of Y.But, the sounding rod that does not have long z direction on these flat boards or the mobile platform, main cause is that long sounding rod far-end can't guarantee the verticality with table top, and verticality is very important in magnetic-field measurement, because magnetic-field measurement need be measured radial magnetic field and axial magnetic field respectively, guarantee that verticality could guarantee respectively to measure the accuracy of component.In addition, the guide rail of steel and turntable can't be applied in the occasion of magnetic-field measurement.
Comprehensively above-mentioned, there is no measurement and positioning device in the product of home and abroad, patent and the document at superconducting magnet, the method that each superconducting magnet research institute adopts at present all is to adopt custom-designed installing and locating measured material at concrete magnet, therefore in the superconducting magnet debugging is installed, need specialty, general, high-precision magnetic-field measurement locating device.
The utility model content
The purpose of this utility model is to overcome existing measurement mechanism can not accurately locate, and particularly can't guarantee the shortcoming of the verticality of magnetic-field measurement, proposes a kind of device that the superconducting magnet Distribution of Magnetic Field is measured that is used for.The utility model can make the gaussmeter measuring sonde accurately locate, and during probe axis and sounding rod axis are fixed automatically, makes sounding rod coaxial with the magnet endoporus by pilot sleeve structure and auxiliary stand.The utility model make measuring sonde in three direction translations of XYZ, and around 360 ° of rotations of Z axle, in the Measurement of Superconducting Magnet room temperature hole magnetic field of arbitrfary point by the adjusting mechanism knob.
The utility model comprises sounding rod, locking fixture, orienting sleeve, installing plate, XY translation stage, universal stage, change-over panel, probe gripper.Universal stage is installed on the change-over panel; The XY translation stage is installed on the universal stage; Installing plate is fixed on the XY translation stage; Orienting sleeve passes the installing plate center pit, is fixed on the installing plate; Locking fixture is installed on the orienting sleeve end face; Probe gripper is installed in the sounding rod bottom.
Sounding rod inserts in the orienting sleeve endoporus, orienting sleeve is installed on the XY translation stage by installing plate, the XY translation stage is that square hollow structure, universal stage and change-over panel are hollow structure, sounding rod moves at Z direction easy on and off along the orienting sleeve endoporus, the XY translation stage makes sounding rod move along the XY direction, has so just realized the translation of XYZ three degree of freedom.Universal stage can make sounding rod rotate around Z axle 360 degree.
Sounding rod adopts aluminum alloy materials, and alignment degree 0.01% before the processing is shown with scale on the sounding rod.
Three micrometer adjusting screws are arranged on the orienting sleeve, be used to adjust the verticality of interior axially bored line of orienting sleeve and table top, when sounding rod inserts the orienting sleeve endoporus, the verticality of sounding rod is met the demands by micrometer adjusting screw.
The utility model comprises the annex of an auxiliary positioning support, and the auxiliary positioning support is installed in the tested magnet endoporus, and main effect is to go deep in the magnet room temperature hole when oversize when sounding rod, and the assurance sounding rod is coaxial with the magnet endoporus.
The utility model superconducting magnet Distribution of Magnetic Field measurement mechanism orienting sleeve, installing plate, XY translation stage and universal stage body use the duralumin, hard alumin ium alloy base material; The guide rail slide block of directions X and Y traversing guide adopts antifriction copper alloy; Each web member such as universal stage bearing, screw, nut uses magnetism-free stainless steel, and whole device does not have ferromagnetic parts, thereby avoids the interference to detection of magnetic field.
The sounding rod of superconducting magnet Distribution of Magnetic Field measurement mechanism can move up and down provides millimeter level Z axle bearing accuracy, the translation precision can reach 0.05 millimeter in the surface level, satisfy the requirement of hi-Fix, can reach 0.5 degree around the running accuracy of Z axle, above precision can also improve as required.
Adopt the utility model, can realize following measurement: magnetic field is along the distribution of axis, the distribution of magnetic field in axial certain Z0 plane, position, and along the distribution of radius R 0, and other are fit to measurements of the present utility model in the Z0 plane in magnetic field.
The utility model device can be used with general in the market gaussmeter, and is simple to operate, and the location is accurate, and highly versatile can satisfy the measurement in present most of superconducting magnets magnetic field.
Description of drawings
Fig. 1 a is a superconducting magnet Distribution of Magnetic Field measurement mechanism structural drawing, and Fig. 1 b is a sectional view.Among the figure: 1 sounding rod, 2 locking fixtures, 3 orienting sleeves, 4 installing plates, 5XY translation stage, 6 universal stages, 7 change-over panels, 8 detector anchor clamps;
Fig. 2 a is XY translation stage 5 structural drawing, among the figure: 9X translation stage, 10Y translation stage, 11Y graduated scale, 12X graduated scale, 13Y displacement knob, 14X displacement knob; Fig. 2 b is the partial view of guide rail, 15 guide rail slide blocks, 16X traversing guide, 17 guide rail matrixes, 18Y traversing guide;
Fig. 3 is universal stage 6 structural drawing, among the figure: 19 locking knobs, 20 turntable handles, 21 sliding bearings, 22 upper table surfaces, 23 following tables;
Fig. 4 is orienting sleeve 3 and mounting plates structure figure, among the figure: 24 surface level micrometer adjusting screws; 25 mounting screws;
Fig. 5 a is probe gripper 8 structural drawing, and Fig. 5 b is a probe gripper 8A-A cut-open view, among the figure: 26 set nuts, 27 probe chucks;
Fig. 6 is locking fixture 2 structural drawing, among the figure: 28 lock-screws;
Fig. 7 is the change-over panel structural drawing;
Fig. 8 be the auxiliary positioning support at magnet endoporus synoptic diagram, among the figure: disk, 32 lower discs on 29 auxiliary positioning supports, the 30 magnet endoporus, 31;
Fig. 9 is the concrete enforcement figure that uses the utility model measurement device superconducting magnet Distribution of Magnetic Field, among the figure: 33 gaussmeters, 34 probe stube cables, 35 superconducting magnets;
Figure 10 uses the utility model measurement device superconducting magnet axis Distribution of Magnetic Field figure;
Figure 11 uses the utility model measurement device superconducting magnet axial location 350mm, radius 20mm circumference Distribution of Magnetic Field figure.
Embodiment
Below in conjunction with the drawings and the specific embodiments the utility model is further specified.
Shown in Fig. 1 a, b, the utility model comprises sounding rod 1, locking fixture 2, orienting sleeve 3, installing plate 4, XY translation stage 5, universal stage 6, change-over panel 7, probe gripper 8.Universal stage 6 is installed on the change-over panel 7; XY translation stage 5 is installed on the universal stage 6; Installing plate 4 is fixed on the XY translation stage 5; Orienting sleeve 3 passes installing plate 4 center pits, is fixed on the installing plate 4; Locking fixture 2 is installed on orienting sleeve 3 end faces; Probe gripper 8 is installed in sounding rod 1 bottom.
Shown in Fig. 1 b, sounding rod 1 inserts in orienting sleeve 3 endoporus through the center pit of locking fixture 2, and orienting sleeve 3 passes installing plate 4 center pits, is fixed on the installing plate 4.Shown in Fig. 2 a, XY translation stage 5 is square hollow structure.As shown in Figure 3, universal stage 6 is circular hollow structure.Shown in Fig. 1 b, change-over panel 7 has the annular plate of through hole in being.Sounding rod 1 can move up and down in the Z direction along orienting sleeve 3 endoporus, also can it be fixed with locking fixture 2 locking sounding rods 1.Scale indication is arranged on the sounding rod 1, can read the Z wheelbase from.
Shown in Fig. 2 a, XY translation stage 5 comprises X translation stage 9 and Y translation stage 10, and X translation stage 9 is positioned on the Y translation stage 10.There is y-scale scale 11 Y translation stage 10 sides, and there is x-scale scale 12 X translation stage 9 sides, in order to the displacement of indication guide rail, satisfy the requirement of 0.05mm degree of regulation.Directions X guide rail 16 is last, and Y traversing guide 18 is following, and the centre is shared guide rail matrix 17.Shown in Fig. 2 b, directions X guide rail 16 and Y traversing guide 18 adopts identical structure, has dovetail groove on directions X guide rail 16 and the Y traversing guide 18, and an end of dovetail groove cooperates with dovetail groove on the guide rail matrix 17, and the other end of dovetail groove is embedded in guide rail slide block 15.Guide rail slide block 15 adopts antifriction copper alloy, and X translation stage 10 and Y translation stage 9 bodies adopt the duralumin, hard alumin ium alloy material.Realize that by rotation Y displacement knob 13 and X displacement knob 14 XY direction 100 * 100mm scope intrinsic displacement is adjustable.
As shown in Figure 3, universal stage 6 can be around 360 ° of rotations of universal stage central shaft.Universal stage 6 is upper and lower minute body structure, and upper table surface 22 is pressed on the following table 23, is supported by sliding bearing 21 between upper table surface 22 and the following table 23.Upper table surface 22, following table 23 all adopt aluminium alloy structure.There is the angle index scale in upper table surface 22 outsides.Manually revolving-turret handle 20 can go to any angle position.During locking knob 19 lockings, universal stage can not rotate.
When measuring magnetic field, the direction parallel with magnet room temperature hole axle is axial magnetic field, i.e. feeler axis direction, with magnet room temperature hole axle vertical direction be radial magnetic field, i.e. measurement mechanism table top direction, the feeler axis will guarantee vertical with the measurement mechanism table top.But work as feeler 1 length and surpass 1000mm, its end is difficult to guarantee verticality with the device table top, and the utility model has designed the orienting sleeve 3 that has micrometer adjusting screw for this reason.As shown in Figure 4, orienting sleeve 3 is with three surface level micrometer adjusting screws 24, by adjusting the height of screw, can carry out trace adjustment to the verticality of feeler 1, makes the verticality of sounding rod satisfy measurement requirement.Orienting sleeve 3 is fixed on the installing plate 4 by three mounting screws 25.
Shown in Fig. 5 a, Fig. 5 b, probe gripper 8 is used for fixing the gaussmeter probe.Detector anchor clamps 8 comprise set nut 27 and probe chuck 26.All there is screw thread probe chuck 26 upper and lower parts, and the top screw thread cooperates with the bottom inner hole thread of sounding rod 1, probe gripper 8 is fixed in the bottom of sounding rod 1; The lower part screw thread cooperates with set nut 27, is used for fixing the gaussmeter probe.Probe chuck 26 has cross recess, set nut 27 in the locking process, the cross recess of probe chuck 26 stressed from around inwardly closed, realize fixed automatically in, thereby make the dead in line of probe axis and sounding rod 1.
As shown in Figure 6, locking fixture 2 one ends have opening, can sounding rod 1 locking is motionless by lock-screw 28, and the Z coordinate is fixed on some positions when making measurement.
As shown in Figure 7, change-over panel 7 is interior round-meshed disk, and change-over panel 7 is used for installing turntable 6, can whole measuring mechanism can be fixed on the magnet according to the room temperature hole punching of tested magnet on change-over panel 7.
As shown in Figure 8, auxiliary positioning support 25 is by last disk 31, lower disc 32, and the centre is formed by connecting with hollow stem.Perforate in the middle of last disk 31, the lower disc 32, the size in hole guarantees and sounding rod 1 wringing fit.Last disk 31, lower disc 32 end faces are parallel, last lower disc end face and endoporus axis normal.Auxiliary positioning support 25 materials are selected nonmagnetic substances such as organic glass, aluminium.Auxiliary positioning support 29 is installed in the magnet endoporus 30, and main effect is to go deep in the magnet room temperature hole when oversize when sounding rod 1, and the assurance sounding rod is coaxial with the magnet endoporus.Auxiliary positioning support 29 inserts in the magnet endoporus 30; Sounding rod 1 inserts auxiliary positioning support 29 center pits; By auxiliary positioning support 29 and magnet endoporus 30 wringing fits, sounding rod 1 and auxiliary positioning support 29 endoporus wringing fits, guarantee that sounding rod 1 is coaxial with magnet endoporus 30.Disk 31, lower disc 32 can be loaded onto flexible rubber ring on auxiliary positioning support 29, so that closely cooperate with endoporus.
Fig. 9 uses the concrete case study on implementation that the utility model is measured magnetic field.The utility model device is installed in superconducting magnet 35 loam cakes, guarantees during installation that this device table top is parallel with the magnet upper surface, is 0 o'clock in X, the Y side-play amount of XY translation stage 5, guarantees sounding rod 1 axis and superconducting magnet 35 endoporus deads in line.The gaussmeter probe is installed on the probe gripper 8, probe stube cable 34 extracts from sounding rod 1 endoporus, is connected on the gaussmeter 33, and probe stube cable 34 is wanted long enough, gaussmeter 33 is worked under the environment away from high-intensity magnetic field, avoid measured deviation occurring because of the high-intensity magnetic field influence.Sounding rod 1 gos deep in the superconducting magnet 35 room temperature holes when oversize.Can guarantee the accurate location of far-end measuring axis by means of auxiliary positioning support 29.
Use the utility model, superconducting magnet Distribution of Magnetic Field measuring method and step are as follows:
(1) measurement mechanism is installed in the loam cake of superconducting magnet 35, guarantees during installation that the central shaft of measurement mechanism overlaps with the room temperature hole central shaft of superconducting magnet.Guarantee that the measurement mechanism table top is parallel with the magnet end face.
(2) the gaussmeter probe is installed on the probe gripper 8, moves up and down sounding rod 1, write down axial scale and corresponding magnetic field value, can measure the data that magnetic field distributes along axis, as shown in figure 10;
(3) sounding rod 1 is adjusted to certain axial distance Z0, handles XY translation stage 5 knobs, along the translation of XY direction, notes XY scale and corresponding magnetic field value, can obtain the data that magnetic field distributes in Z 0 plane;
(4) sounding rod 1 of measurement mechanism is adjusted to certain axial distance Z0, handles XY translation stage 5 knobs and makes X or Y off-axis certain distance R0, rotates universal stage 6, can obtain the data that magnetic field distributes along radius R 0 in the Z0 plane.Be certain superconducting magnet axial location 350mm, radius 20mm circumference Distribution of Magnetic Field figure as shown in figure 11.
Claims (6)
1, a kind of superconducting magnet Distribution of Magnetic Field measurement mechanism that is used for is characterized in that comprising sounding rod (1), locking fixture (2), orienting sleeve (3), installing plate (4), XY translation stage (5), universal stage (6), change-over panel (7), probe gripper (8); Universal stage (6) is installed on the change-over panel (7); XY translation stage (5) is installed on the universal stage (6); Installing plate (4) is fixed on the XY translation stage (5); Orienting sleeve (3) is fixed on the installing plate (4); Locking fixture (2) is installed on orienting sleeve (3) end face; Sounding rod (1) passes locking fixture (2) hole and inserts in orienting sleeve (3) endoporus, passes XY translation stage (5), universal stage (6) and change-over panel (7); Probe gripper (8) is installed in the bottom of sounding rod (1).
2, be used to survey superconducting magnet Distribution of Magnetic Field measurement mechanism according to claim 1 is described, it is characterized in that described XY translation stage (5) comprises X translation stage (9) and Y translation stage (10); X translation stage (9) is positioned on the Y translation stage (10), is shared guide rail matrix (17) between directions X guide rail (16) and the Y traversing guide (18); There is y-scale scale (11) Y translation stage (10) side, and there is x-scale scale (12) X translation stage (9) side; Have dovetail groove on directions X guide rail (16) and the Y traversing guide (18), an end of dovetail groove cooperates with dovetail groove on the guide rail matrix (17), and the other end of dovetail groove is embedded in guide rail slide block (15).
3, according to the described superconducting magnet Distribution of Magnetic Field measurement mechanism that is used for of claim 1, it is characterized in that described universal stage (6) is upper and lower minute body structure, upper table surface (22) is pressed on the following table (23), has sliding bearing (21) to support between upper table surface (22) and the following table (23); Upper table surface (22) lateral surface has the angle index scale; Universal stage (6) can be around 360 ° of rotations of universal stage (6) central shaft, and manually revolving-turret handle (20) can rotate to any angle position; During locking knob (19) locking, universal stage (6) can not rotate.
4, according to the described superconducting magnet Distribution of Magnetic Field measurement mechanism that is used for of claim 1, it is characterized in that described orienting sleeve (3) has three surface level micrometer adjusting screws (24), adjust the height of surface level micrometer adjusting screw (24), the verticality of feeler (1) is carried out trace adjustment.
5, according to the described superconducting magnet Distribution of Magnetic Field measurement mechanism that is used for of claim 1, it is characterized in that probe gripper (8) is fixed in the bottom of sounding rod (1); Detector anchor clamps (8) comprise set nut (26) and probe chuck (27), probe chuck (27) has cross recess, set nut (26) is in the locking process, the cross recess of probe chuck (27) is stressed from inwardly closed all around, realize fixed automatically in, thereby make the dead in line of probe axis and sounding rod (1).
6,, it is characterized in that the guide rail slide block (15) of described directions X and Y traversing guide adopts antifriction copper alloy according to any one described superconducting magnet Distribution of Magnetic Field measurement mechanism that is used for of claim 1-5; X translation stage (10) and Y translation stage (9) body adopt the duralumin, hard alumin ium alloy material; The upper table surface (22) of universal stage (6), following table (23), and sounding rod (1) adopts aluminum alloy materials; Universal stage bearing, each web member use magnetism-free stainless steel, and described device does not have ferromagnetic parts.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201245449U CN201322791Y (en) | 2008-12-23 | 2008-12-23 | Device for measuring magnetic field distribution of superconducting magnet |
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| CNU2008201245449U CN201322791Y (en) | 2008-12-23 | 2008-12-23 | Device for measuring magnetic field distribution of superconducting magnet |
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| CN108939324A (en) * | 2018-08-29 | 2018-12-07 | 合肥中科离子医学技术装备有限公司 | A kind of pull rod pre-tightening mechanism for cyclotron superconducting magnet |
| CN108939324B (en) * | 2018-08-29 | 2023-07-18 | 合肥中科离子医学技术装备有限公司 | Pull rod pre-tightening mechanism for cyclotron superconducting magnet |
| CN109342780A (en) * | 2018-11-17 | 2019-02-15 | 中国科学院理化技术研究所 | Probe support clamping mechanism and magnetic field measuring device of magnet space |
| CN109324300A (en) * | 2018-11-17 | 2019-02-12 | 中国科学院理化技术研究所 | Magnetic field measuring device, magnetic field testing system and magnetic field testing method for magnet space |
| CN110426657A (en) * | 2019-02-20 | 2019-11-08 | 哈尔滨工业大学（威海） | The ultra-thin air-gap field test device of rotating electric machine and method |
| CN110426657B (en) * | 2019-02-20 | 2021-10-22 | 哈尔滨工业大学（威海） | Device and method for testing ultrathin air gap magnetic field of rotating motor |
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