CN203931702U - A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment - Google Patents
A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment Download PDFInfo
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- CN203931702U CN203931702U CN201420286235.7U CN201420286235U CN203931702U CN 203931702 U CN203931702 U CN 203931702U CN 201420286235 U CN201420286235 U CN 201420286235U CN 203931702 U CN203931702 U CN 203931702U
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Abstract
The utility model belongs to teaching and experiment equipment technical field, is specially a kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment.The utility model device comprise magnet framework, Helmholtz coil to, pure iron pole shoe, Nd-Fe-B magnet steel, adjustable yoke, soket head cap screw, adjusting lock-screw and regulate outer screw; This device carrys out meticulous adjusting uniformity of magnetic field by six set screw in yoke; Further reach the effect of shimming and tune field by two groups of Helmholtz coils; Nd-Fe-B magnet steel is through screening pairing, and pure iron yoke, through fine gtinding, ensures magnet arrangement assembly high evenness.This device is easy for installation, the uniformity is high, can be in teaching field continuous wave nuclear magnetic resonance, pulsed nuclear magnetic resonance and Magnetic resonance imaging experiment instrument.
Description
Technical field
The utility model belongs to teaching and experiment equipment technical field, is specifically related to a kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment.
Background technology
Nulcear magnetic resonance (NMR) education experiment always is an important content in the Experiments of Modern Physics of institution of higher learning and Lab of General Physics, and being one, the core component of nuclear magnetic resonance experiment instrument can provide suitable intensity, good uniformity, magnet that stability is strong, along with the development of rare earth material application, permanent magnet device taking Nd-Fe-B magnet steel as main body more and more comes into one's own, and has obtained studying widely and applying.So, current domestic instruments used for education field, the overwhelming majority is the low-field nuclear magnetic resonance laboratory apparatus made from Nd-Fe-B permanent magnet device.
Summary of the invention
The purpose of this utility model is to provide that a kind of stability for nuclear magnetic resonance experiment instruments used for education is high, good uniformity, installation permanent magnet device easy to adjust.
A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment provided by the utility model, comprise magnet framework 1, Helmholtz coil to 2, pure iron pole shoe 3, Nd-Fe-B magnet steel 4, adjustable yoke 5, soket head cap screw 6, regulate lock-screw 7 and regulate outer screw 8, wherein:
2 adjustable yokes 5 are respectively through two circular holes corresponding to magnet framework 1 left and right sides, and by regulating lock-screw 7 to be fixed on magnet framework 1, detect two Nd-Fe-B magnet steels 4 that matched and be arranged on the corresponding end of two adjustable yokes 5, and ensure nose circle alignment; Two pure iron pole shoes 3 are arranged on the corresponding end of two Nd-Fe-B magnet steels 4, still ensure nose circle alignment; Helmholtz coil is enclosed within on two pure iron pole shoes 32, and wherein, and one group of Helmholtz coil is connected into tune format of field, and another group Helmholtz coil is connected into shimming form; Soket head cap screw 6 is positioned at four jiaos of magnet framework 1, the two ends of adjustable yoke 5, for the regulating magnet uniformity (specifically can pass through nulcear magnetic resonance (NMR) coda wave signal, the magnet uniformity is adjusted to 5ppm); Each adjustable yoke 5 has 3 adjusting lock-screws 7 fixing, and 3 adjusting lock-screws 7 are uniformly distributed at adjustable yoke 5 edges, have in addition 3 outer screws 8 to be uniformly distributed at adjustable yoke 5 edges, regulates lock-screw 7 and outer screw 8 arranged in a crossed manner; Regulate lock-screw 7 and outer screw 8 for regulating uniformity of magnetic field.
In the utility model, described Helmholtz coil can produce to 2 two kinds of connected modes field and the two kinds of effects of shimming of adjusting.
In the utility model, by the meticulous adjusting of six screws in yoke, uniformity of magnetic field is obviously improved.
In the utility model, described Nd-Fe-B magnet steel 4 is to measure magnetic table magnetic field by computer scanning to screen, and according to measurement data, magnet steel is matched between two, to ensure magnetic field homogeneity.
In the utility model, described pure iron pole shoe 3 is to carry out fine gtinding by special grinder, makes Pure Iron Surface height smooth, is arranged on Nd-Fe-B magnet steel end face, makes intermediate air gap magnetic field height even.
The utility model has the advantage of, screen when pairing ensures that with pure iron yoke grinding technique I shape permanent magnet device is installed and can reach the even requirement in relative magnetic field by Nd-Fe-B magnet steel, when after Nd-Fe-B magnet steel and the installation of pure iron yoke, regulate six set screw by continuous wave nuclear magnetic resonance signal, make uniformity of magnetic field reach instrument requirement.Finally adjust field and shimming to regulate by Helmholtz coil again.
Brief description of the drawings
Fig. 1 is I-shaped permanent magnet device structural representation of the present utility model.Wherein, left figure is profile, and right figure is vertical view.
Fig. 2 is that two Helmholtz coils are to producing and adjust field and shimming effect schematic diagram at magnetic blow out centre.
Fig. 3 is Nd-Fe-B magnet steel table magnetic measurement selection method schematic diagram.
Fig. 4 is pure iron pole shoe lapping device schematic diagram.
Number in the figure: 1 be magnet framework, 2 for Helmholtz coil to, 3 for pure iron pole shoe, 4 for Nd-Fe-B magnet steel, 5 for adjustable yoke, 6 for the fixing soket head cap screw of magnet framework, 7 be outer screw for regulating lock-screw, 8; 9 is pure iron pole shoe fixture, and 10 is abrasive disk.
Embodiment
A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment provided by the utility model, comprise magnet framework 1, Helmholtz coil to 2, pure iron pole shoe 3, Nd-Fe-B magnet steel 4, adjustable yoke 5, the fixing soket head cap screw 6 of magnet framework, uniformity of magnetic field regulate lock-screw 7 and uniformity of magnetic field to regulate outer screw 8, wherein:
Adjustable yoke 5 is passed two of 1 left and right of magnet framework circular hole, and regulates lock-screw 7 to be fixed on magnet framework 1 by uniformity of magnetic field, detects the Nd-Fe-B magnet steel 4 having matched and is arranged on the corresponding end of yoke 5, and ensure nose circle alignment; The pure iron magnetic head 3 of crossing through grinder fine gtinding is arranged on the two ends of Nd-Fe-B magnet steel 4, still ensures nose circle alignment; Helmholtz coil is enclosed within on two pole shoes 2, and in two groups of Helmholtz coils, one group is connected into tune format of field, and another group is connected into shimming form; Finally regulate the hexagon socket head cap screw at yoke two ends, by nulcear magnetic resonance (NMR) coda wave signal, the magnet uniformity is adjusted to 5ppm.
In the utility model, described Helmholtz coil produces magnetic field as shown in Figure 2 to 2 two kinds of connected modes:
" adjust field " and select two, outside coils composition Helmholtz coils pair, it is consistent that two of left and right coil electricity stream makes central area produce magnetic direction, like this permanent magnet produce magnetic field on just can superpose one among a small circle regulate electromagnetic field, play adjusting resonant field effect." shimming " selects two of inner sides coil composition Helmholtz coil pair, it is relative that two of left and right coil electricity stream makes central area produce magnetic direction, produce a gradient magnetic in magnetic blow out centre region, by changing size of current, can change the size of gradient magnetic, to reach the effect of shimming.
In the utility model, described two yokes 5 regulate the central magnetic field uniformity by lock-screw 7 and outer screw 8, wherein 7 three of lock-screws, screwing this screw can make yoke move to magnetic core direction, 8 three of outer screws, screw this screw and can make yoke move to anti-magnetic core direction, and six screws intersections are evenly distributed in yoke 5, by the careful adjusting of diverse location screw, can make uniformity of magnetic field obviously improve.
In the utility model, described Nd-Fe-B magnet steel 4 is to measure magnetic table magnetic field by computer scanning to screen pairing, as shown in Figure 3, on the Nd-Fe-B magnet steel that is 100mm at diameter, label is respectively a, b, c, d, five dotted line positions of e are respectively diameter 10mm, 20mm, 40mm, 60mm, the concentric circles of 80mm, along dotted line position meter magnetic, obtains 5 table magnetic measurement curves by specialized equipment, and every curve can show magnetic field size, Nd-Fe-B magnet steel can be selected and match to the shake size by corresponding diametral curve and magnetic field size.
In the utility model, described pure iron pole shoe 3 is to carry out fine gtinding by special grinder to obtain.As shown in Figure 4, wherein pure iron pole shoe fixture 9 is made up of the circular neutral gear of five diameter 102mm, once can put into five pure iron pole shoes, and motor is equipped with in fixture 9 upper ends, can rotate on continuous uniform ground.Abrasive disk 10 is rotating disks that the spheroidal graphite cast-iron of middle uniform fluting is made, and motor is equipped with in bottom, also can rotate on continuous uniform ground.When grinding, upper and lower motor rotates simultaneously, evenly coats abrasive pastes on abrasive disk, and five pure iron pole shoes rely on Action of Gravity Field to grind.
Claims (1)
1. the I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment, it is characterized in that comprising magnet framework, Helmholtz coil to, pure iron pole shoe, Nd-Fe-B magnet steel, adjustable yoke, soket head cap screw, adjusting lock-screw and regulate outer screw, wherein:
2 adjustable yokes are respectively through two circular holes corresponding to the magnet framework left and right sides, and by regulating lock-screw to be fixed on magnet framework, two Nd-Fe-B magnet steels of pairing are arranged on the corresponding end of two adjustable yokes after testing, and ensure nose circle alignment; Two pure iron pole shoes are arranged on the corresponding end of two Nd-Fe-B magnet steels, still ensure nose circle alignment; Helmholtz coil is to being enclosed within on two pure iron pole shoes, and wherein, and one group of Helmholtz coil is connected into tune format of field, and another group Helmholtz coil is connected into shimming form; Soket head cap screw (6) is positioned at four jiaos of magnet framework, the two ends of adjustable yoke, for the regulating magnet uniformity; Each adjustable yoke has 3 adjusting lock-screws to fix, and 3 adjusting lock-screws are uniformly distributed at adjustable yoke edge, has in addition 3 outer screws to be uniformly distributed at adjustable yoke edge, regulates lock-screw and outer screw arranged in a crossed manner; Regulate locking screw (7) and outer screw to be used for regulating uniformity of magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286235.7U CN203931702U (en) | 2014-06-01 | 2014-06-01 | A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286235.7U CN203931702U (en) | 2014-06-01 | 2014-06-01 | A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment |
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| Publication Number | Publication Date |
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| CN203931702U true CN203931702U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420286235.7U Expired - Fee Related CN203931702U (en) | 2014-06-01 | 2014-06-01 | A kind of I-shaped permanent magnet device for nulcear magnetic resonance (NMR) teaching and experiment equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710393A (en) * | 2017-01-01 | 2017-05-24 | 重庆科技学院 | Miniature static magnetic field experiment device |
| CN108344763A (en) * | 2018-02-23 | 2018-07-31 | 重庆工程职业技术学院 | A kind of unilateral Nuclear Magnetic Resonance Measurement instrument tutoring system |
| CN110690024A (en) * | 2019-10-12 | 2020-01-14 | 燕山大学 | Magnetic field generating device and manufacturing method thereof |
| WO2023066523A1 (en) * | 2021-10-21 | 2023-04-27 | Giesecke+Devrient Currency Technology Gmbh | Sensor element for testing a data carrier having a spin resonance feature, dividing method, mounting method and testing method |
-
2014
- 2014-06-01 CN CN201420286235.7U patent/CN203931702U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710393A (en) * | 2017-01-01 | 2017-05-24 | 重庆科技学院 | Miniature static magnetic field experiment device |
| CN108344763A (en) * | 2018-02-23 | 2018-07-31 | 重庆工程职业技术学院 | A kind of unilateral Nuclear Magnetic Resonance Measurement instrument tutoring system |
| CN108344763B (en) * | 2018-02-23 | 2024-02-27 | 重庆工程职业技术学院 | Unilateral nuclear magnetic resonance measuring instrument teaching system |
| CN110690024A (en) * | 2019-10-12 | 2020-01-14 | 燕山大学 | Magnetic field generating device and manufacturing method thereof |
| CN110690024B (en) * | 2019-10-12 | 2020-10-02 | 燕山大学 | Magnetic field generating device and manufacturing method thereof |
| WO2023066523A1 (en) * | 2021-10-21 | 2023-04-27 | Giesecke+Devrient Currency Technology Gmbh | Sensor element for testing a data carrier having a spin resonance feature, dividing method, mounting method and testing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20170601 |