Power-frequency noise suppression device based on SQUID triaxial magnetometer

A power frequency noise suppression device technology, applied in the field of superconducting electronics, can solve problems affecting nuclear magnetic resonance signals, affecting spectral lines or imaging quality, etc., to achieve the effect of improving signal-to-noise ratio and suppressing power frequency harmonic interference

Inactive Publication Date: 2017-05-17
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, if figure 1 As shown, the power frequency and its harmonic interference in the ambient magnetic field will seriously affect the NMR signal of the measured sample in the extremely low field NMR system, and then affect the spectral line or imaging quality.

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  • Power-frequency noise suppression device based on SQUID triaxial magnetometer
  • Power-frequency noise suppression device based on SQUID triaxial magnetometer

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Embodiment Construction

[0028] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual impleme...

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Abstract

The invention provides a power-frequency noise suppression device based on an SQUID triaxial magnetometer. The power-frequency noise suppression device is applied to an ultra-low-field nuclear magnetic resonance system and comprises a Dewar, an SQUID second-order gradient meter, the SQUID triaxial magnetometer and a reading circuit. The SQUID second-order gradient meter and the SQUID triaxial magnetometer are both arranged in the Dewar. The SQUID second-order gradient meter is used for detecting a nuclear magnetic resonance signal in the ultra-low-field nuclear magnetic resonance system. The SQUID triaxial magnetometer includes three SQUID magnetometer bodies orthometric mutually and is used for detecting power-frequency noise in a detecting environment magnetic field. The reading circuit is used for reading output voltages of the SQUID second-order gradient meter and the SQUID triaxial magnetometer and obtaining the nuclear magnetic resonance signal undergoing power-frequency noise suppression through processing. The power-frequency noise suppression device based on the SQUID triaxial magnetometer effectively inhibits power-frequency noise interference and improves the signal-to-noise ratio of the nuclear magnetic resonance signal.

Description

technical field [0001] The invention relates to the technical field of superconducting electronics, in particular to a power frequency noise suppression device based on a SQUID three-axis magnetometer. Background technique [0002] Superconducting Quantum Interference Device (SQUID) is an extremely sensitive instrument that can measure weak magnetic signals. In terms of its function, it is a magnetic flux sensor. Measure other physical quantities that can be converted into magnetic flux, such as voltage, current, resistance, inductance, magnetic induction, magnetic field gradient, magnetic susceptibility, etc. The basic principle of SQUID is based on flux quantization and Josephson effect. According to the difference of bias current, it is divided into two types: DC and RF. SQUID as a detector can measure out 10 -11 The weak magnetic field of Gauss is only equivalent to one ten billionth of the earth's magnetic field, which is several orders of magnitude higher than the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/32G01R33/36
CPCG01R33/326G01R33/36
Inventor 邱阳董慧黄小磊陶泉李波
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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