Open type permanent magnet module with leak stopping structure used for magnetic resonance wave spectrum analyzer

A technology of spectral analysis and magnetic resonance, applied in the field of open permanent magnet modules, can solve the problems of high maintenance cost, large volume and weight, and achieve the effect of low cost, small volume and light weight

Inactive Publication Date: 2009-01-14
HARBIN INST OF TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of large volume and weight and high maintenance cost of superconducting magnets used in existing magnetic resonance spectru

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Open type permanent magnet module with leak stopping structure used for magnetic resonance wave spectrum analyzer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0006] Specific embodiment one: referring to Figure 1, this embodiment is composed of a C-shaped yoke 1, an upper magnet 2 and a lower magnet 3. The upper magnet 2 is composed of an upper ring cylindrical magnetic shell 2-1 and an upper magnetic core 2-2 , Magnetic poles 2-3 and shim coils 2-4, the upper ring cylindrical magnetic shell 2-1 is arranged on the lower end surface of the upper arm of the C-shaped yoke 1, and the magnetization direction of the upper ring cylindrical magnetic shell 2-1 is close to The upper arm of the C-shaped yoke 1 gradually changes from the vertical direction parallel to the vertical direction close to the imaging space 4, the upper magnetic core 2-2 is arranged in the upper ring cylindrical magnetic shell 2-1 and the upper magnetic core 2- The upper end face of 2 is set on the lower end face of the upper arm of the C-shaped yoke 1, the magnetization direction of the upper magnetic core 2-2 is parallel to the vertical direction, and the upper end face...

Example Embodiment

[0008] Specific embodiment two: referring to FIG. 1, the upper magnet 2 and the lower magnet 3 of this embodiment are respectively added with gradient coils 2-5 based on the specific embodiment 1, and the two gradient coils 2-5 are respectively arranged in the imaging space 4. In the position close to the pole end face. Part of the shimming function of the shim coil can be realized by the gradient coil 2-5. Both the shim coil 2-4 and the gradient coil 2-5 are arranged in the imaging space 4 near the magnetic end surface. The shim coil 2- 4 Relatively close to the magnetic pole 2-3 or the gradient coil 2-5 relatively close to the magnetic pole 2-3 can increase the shimming accuracy, and some non-magnetic can be filled between the gradient coil 2-5 and the shim coil 2-4 Of the substance.

Example Embodiment

[0009] Embodiment 3: Referring to FIG. 2, this embodiment adds a plurality of magnetic sheets 5 on the basis of the first embodiment, and each magnetic sheet 5 is respectively arranged on the surface of the magnetic pole 2-3 near one end of the imaging space 4. The magnetic sheet 5 is used for shimming, and an iron sheet can also be used to partially or completely replace the magnetic sheet 5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an open permanent magnet module which is provided with an anti-leakage structure and used for a magnetic resonance spectrum analyser, in particular to the open permanent magnet module which solves the problems that a superconducting magnet adopted by the existing magnetic resonance spectrum analysis equipment has large volume and weight and high maintenance cost. The magnetization direction of an upper cylindrical magnetic shell is gradually changed from being parallel to the vertical direction close to a C-shaped magnetic yoke upper arm to being vertical to the vertical direction; an upper magnetic core is arranged inside the upper cylindrical magnetic shell; the magnetization direction of the upper magnetic core is parallel to the vertical direction; the upper end surface of a magnetic core is arranged on the lower end surface of the upper magnetic core; the lower end surface of the magnetic pole is a convex-concave ring-shaped structure; a shim coil is arranged at the position close to the lower end surface of the magnetic pole; the structure of the lower magnet is the same with that of the upper magnet; furthermore, the lower magnet and the upper magnet are arranged symmetrically in the upper and lower direction on the lower end surface of the C-shaped magnetic yoke; the magnetization direction of the lower cylindrical magnetic shell of the lower magnet and the magnetization direction of the upper cylindrical magnetic shell are symmetric in the upper and lower direction. The magnetization direction of the lower magnetic core of the lower magnet is the same with that of the upper magnetic core.

Description

technical field [0001] The invention relates to an open permanent magnet module. Background technique [0002] At present, most of the magnet modules used for magnetic resonance spectroscopy use superconducting magnets, because the magnetic field provided by superconducting magnets has the advantage of good uniformity, which can meet the requirements of material structure analysis, but superconducting magnets also have large volume and weight, The disadvantage of higher maintenance costs. At present, the permanent magnet module used in the spectrometer for industrial magnetic resonance analysis cannot meet the high-performance requirements of magnetic resonance spectroscopy because the uniformity of the main magnetic field provided is poorer than that of superconducting magnets. Contents of the invention [0003] In order to solve the problems of large volume and weight and high maintenance cost of the superconducting magnets used in the existing magnetic resonance spectr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01F7/02G01R33/383
Inventor 宋枭禹郭斌柴凤
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap