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Variable field nuclear magnetic resonance system and nuclear magnetic resonance signal measurement method

A nuclear magnetic resonance and variable technology, applied in the direction of using nuclear magnetic resonance for analysis, etc., can solve the problems of not being able to meet the needs of high-efficiency measurement, and can not effectively obtain the nuclear magnetic resonance signal of the object to be tested, so as to achieve good magnetic field stability and uniformity. Effect of high noise ratio and efficiency improvement

Inactive Publication Date: 2020-01-14
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] The invention provides a variable field nuclear magnetic resonance system and a nuclear magnetic resonance signal measurement method, which are used to solve the problem that the existing nuclear magnetic resonance measurement system cannot effectively obtain the nuclear magnetic resonance signals of the object under different static magnetic fields in a short time. Technical Issues Adapting to Practical and Efficient Measurement Requirements

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  • Variable field nuclear magnetic resonance system and nuclear magnetic resonance signal measurement method
  • Variable field nuclear magnetic resonance system and nuclear magnetic resonance signal measurement method
  • Variable field nuclear magnetic resonance system and nuclear magnetic resonance signal measurement method

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Embodiment 1

[0029] A variable field nuclear magnetic resonance system 100, such as figure 1 As shown, it includes: a static magnetic field generator 110 driven by an adjustable constant current source, a high frequency magnetic field generator 120, and a signal detection device 130 based on a tunnel magnetoresistive sensor. Among them, the static magnetic field generator driven by an adjustable constant current source is used to drive the excitation magnetic field output coil to generate a DC static magnetic field through an adjustable constant current source; the high frequency magnetic field generator is used to drive the high frequency magnetic field output coil through a function signal generator , irradiating the subject to which the static magnetic field is applied with a high-frequency magnetic field; the signal detection device based on the tunnel magnetoresistive sensor is used to use the tunnel magnetoresistive sensor as a probe to receive the nuclear magnetic resonance signal ge...

Embodiment 2

[0046] A method for measuring nuclear magnetic resonance signals, comprising:

[0047] Using any variable field nuclear magnetic resonance system as described in the first embodiment above, the nuclear magnetic resonance signal of the subject under a specific DC static magnetic field is obtained; if the nuclear magnetic resonance signal under other static magnetic fields is measured, the variable field is adjusted The static magnetic field generating device in the nuclear magnetic resonance system generates the other static magnetic fields, and repeats the above process.

[0048] For example, the size of the main magnetic field B0 and the high-frequency magnetic field B1 are set through the software system. After the variable field nuclear magnetic resonance system collects the nuclear magnetic resonance signals of the object under test, the acquired information is processed in the software. Specifically, after the original signal undergoes digital quadrature demodulation and ...

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Abstract

The invention discloses a variable field nuclear magnetic resonance system and a nuclear magnetic resonance signal measurement method. The system comprises: a static magnetic field generating device for driving an excitation magnetic field output coil to generate a DC static magnetic field through an adjustable constant current source; a high-frequency magnetic field generating device for drivinga high-frequency magnetic field output coil by a function signal generator to irradiate a high-frequency magnetic field to a detected object applied with the static magnetic field; and a signal detection device based on a tunnel magnetoresistive sensor for using the tunnel magnetoresistive sensor as a probe to receive a nuclear magnetic resonance signal generated by the detected object. The staticmagnetic field generating device of the variable field nuclear magnetic resonance system drives the excitation magnetic field coil to generate the stable and controllable DC magnetic field based on the precise adjustable constant current source, so that the main magnetic field is adjustable according to actual needs. In addition, the probe made based on the TMR sensor receives the nuclear magnetic resonance signal generated by the detected object, so that the signal-to-noise ratio of the detection signal is high. Therefore, the nuclear magnetic resonance disclosed by the invention can effectively meet the high-efficiency testing requirements in the actual scientific research or production process.

Description

technical field [0001] The invention belongs to the field of nuclear magnetic resonance spectrum measurement, and more specifically relates to a variable field nuclear magnetic resonance system and a method for measuring nuclear magnetic resonance signals. Background technique [0002] Nuclear Magnetic Resonance (NMR) refers to the physical process of atomic nuclei whose magnetic moment is not zero. Under the action of an external magnetic field, Zeeman splits the spin level and resonantly absorbs radio frequency radiation of a certain frequency. This phenomenon can be used to determine the molecular structure. At present, the research of nuclear magnetic resonance mainly focuses on the spectra of two types of atomic nuclei, hydrogen spectrum and carbon spectrum. Among them, according to the magnetic field strength of the static magnetic field, it can be divided into high-field nuclear magnetic resonance and low-field nuclear magnetic resonance. [0003] Existing low-field n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/08
Inventor 刘文中郭斯琳胡朋程晶晶
Owner HUAZHONG UNIV OF SCI & TECH
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