Low-field nuclear magnetic resonance probe magnet structure having magnetic field switch function

A technology of low-field nuclear magnetic resonance and magnets, which is applied in the direction of magnets, magnetic objects, permanent magnets, etc., and can solve problems such as not having the "switching" characteristics of magnetic fields

Inactive Publication Date: 2017-12-12
PETROCHINA CO LTD
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  • Application Information

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Problems solved by technology

Compared with medical MRI, low-field nuclear magnetic resonance instruments developed based on permanent magnet materials are smaller and cheaper, but the characteristics of their magnet materials also determine that they cannot control when the magnetic field is generated and disappeared like MRI, that is, they do not have a magnetic field The "switch" feature of

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  • Low-field nuclear magnetic resonance probe magnet structure having magnetic field switch function
  • Low-field nuclear magnetic resonance probe magnet structure having magnetic field switch function
  • Low-field nuclear magnetic resonance probe magnet structure having magnetic field switch function

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Embodiment Construction

[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] A low-field nuclear magnetic resonance probe magnet structure with a magnetic field switch function, including an outer ring magnet 1 and an inner ring magnet 2, both of the outer ring magnet 1 and the inner ring magnet 2 have a cylindrical structure, and the outer ring magnet 1 is sleeved on the inner ring Outside the magnet 2, the outer ring magnet 1 can rotate relative to the inner ring magnet 2. In the columnar structure surrounded by the inner surface of the inner ring magnet 2, when the magnet structure of the low-field NMR probe is in the measurement state, the outer ring magnet 1 And the inner ring magnet 2 can be at any point (such as figure 1 with Figure 4 The magnetic induc...

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Abstract

The invention discloses a low-field nuclear magnetic resonance probe magnet structure with a magnetic field switch function, comprising an outer ring magnet (1) and an inner ring magnet (2), and the outer ring magnet (1) is sheathed outside the inner ring magnet (2) . The outer ring magnet and the inner ring magnet of the low-field nuclear magnetic resonance probe magnet structure with the magnetic field switching function generate the same uniform magnetic field distribution inside the probe. During NMR measurement, after the static magnetic fields of the outer ring magnet and the inner ring magnet are superimposed on each other, they are equal to the magnetic field strength required by the design; when the measurement ends or the static magnetic field needs to be temporarily "turned off", the outer ring magnet is driven by the motor Rotate 180 degrees. At this time, the magnetic field strength generated by the inner and outer ring magnets is the same, but the direction is opposite, thus canceling each other out. At this time, the sample entering the magnetic field will no longer be magnetized.

Description

technical field [0001] The invention relates to the field of low-field nuclear magnetic resonance equipment, in particular to a low-field nuclear magnetic resonance probe magnet structure with a magnetic field switch function. Background technique [0002] The innovation of NMR measurement technology and application methods is based on the research and development of instruments. In recent years, new low-field nuclear magnetic resonance probe magnets and new structures have emerged. Unlike medical high-field MRI (magnetic resonance imaging), which uses superconducting coils to provide the static magnetic field necessary to generate nuclear magnetic resonance phenomena, low-field nuclear magnetic resonance probes are all permanent. The magnet material serves as the source of the static magnetic field. Compared with medical MRI, low-field nuclear magnetic resonance instruments developed based on permanent magnet materials are smaller and cheaper, but the characteristics of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02G01R33/383
CPCH01F7/021G01R33/383H01F7/0226
Inventor 邓峰张鑫杨威赵瑞东师俊峰
Owner PETROCHINA CO LTD
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