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A noise suppression system and method suitable for proton magnetic precession signal

A noise suppression and magnetic precession technology, applied in the direction of the magnitude/direction of the magnetic field, electric/magnetic exploration, radio wave measurement system, etc.

Active Publication Date: 2021-07-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a noise suppression system and method suitable for proton magnetic precession signals in view of the technical problems existing in the design of the sensor tuning algorithm for the above-mentioned existing proton precession magnetometers The technical flaws mentioned above

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  • A noise suppression system and method suitable for proton magnetic precession signal
  • A noise suppression system and method suitable for proton magnetic precession signal
  • A noise suppression system and method suitable for proton magnetic precession signal

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Embodiment Construction

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] A noise suppression system suitable for proton precession signals such as figure 1As shown, it includes a dynamic nuclear polarization weakening sensor, an excitation circuit, a tuning circuit, an amplifier circuit, a narrowband filter circuit, a comparison circuit, a collector, an FPGA, and a controller. The dynamic nuclear polarization sensor receives the excitation signal from the excitation circuit and senses The proton magnetic precession signal is transmitted to the tuning circuit. After the tuning circuit tunes the signal, it is transmitted to the amplification circuit. After the amplification circuit amplifies the signal, it is transmitted to the narrowband filter circuit, comparison circuit and collector ...

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Abstract

The invention provides a noise suppression system and method suitable for proton magnetic precession signals. The dynamic nuclear polarization sensor receives the excitation signal sent by the excitation circuit, induces the proton magnetic precession signal, and transmits it to the tuning circuit. After the signal is tuned, it is passed to the amplifying circuit. After the amplifying circuit amplifies the signal, the narrowband filter performs bandpass filtering on the signal to remove the noise outside the center frequency band, and then transmits it to the comparison circuit. After the comparison circuit processes the narrowband filter After the signal is shaped into a square wave, it is passed to the FPGA for later signal processing. The collector is connected to the controller for data collection and processing. The controller is connected to the excitation circuit to control the opening and closing of the excitation signal. The controller Connect with FPGA, FPGA measures the frequency of the proton magnetic precession signal after being shaped into a square wave, and converts the measured frequency value into a magnetic field value, and the controller is connected with the narrow-band filter to adjust its narrow-band center frequency.

Description

technical field [0001] The invention relates to the technical field of weak magnetic field measurement, in particular to a noise suppression system and method suitable for proton magnetic precession signals. Background technique [0002] The proton precession type magnetometer is a magnetic field measuring instrument used to measure slowly changing weak magnetic fields or constant weak magnetic fields, and its sensor, the proton precession type sensor, is an inductive element. The measurement principle is to use certain excitation conditions to make the protons in the solution where the inductor is in an activated state. After the excitation conditions are removed, the protons will perform Larmor precession around a stable external magnetic field, that is, the earth's magnetic field, and generate proton magnetic precession signals. The precession frequency is proportional to the external magnetic field; therefore, the external magnetic field value can be obtained by using th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/40
CPCG01R33/0029G01R33/02
Inventor 刘欢董浩斌朱俊袁志文葛健张艳丽
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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