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High-speed large-dynamic-range magnetic field measurement system

A large dynamic range, magnetic field measurement technology, applied in the field of sensing, can solve the problems of small dynamic range, low refresh rate, and low precision, and achieve the effect of high flexibility, high measurement refresh rate, and wide application scenarios

Pending Publication Date: 2022-05-06
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

[0010] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a high-speed large dynamic range magnetic field measurement system, which is used to solve the problem of small dynamic range, low Problems such as low refresh rate, low precision, and low slew rate

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Embodiment Construction

[0072] 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.

[0073] see Figure 1 to Figure 5 . 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 arb...

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Abstract

The invention provides a high-speed large-dynamic-range magnetic field measurement system, and the system comprises an agile radio frequency source which generates an intermediate frequency signal based on a frequency control word; the mixer is connected with the intermediate frequency signal and the local oscillator signal and outputs a radio frequency signal; the magnetic field detection module is used for detecting a magnetic field to generate a fluorescence signal and a corresponding digital electric signal; the phase-locked demodulation module is used for outputting a fluorescence demodulation signal; and the closed-loop frequency locking module is used for tracking and calculating the microwave frequency movement amount and the magnetic field size variation of the current period relative to the previous period based on the fluorescence demodulation signal, obtaining the microwave center frequency and the magnetic field size of the current period, and converting the microwave frequency movement amount into a frequency control word to update the frequency of the intermediate frequency signal. According to the invention, the paramagnetic resonance sensor is expanded from the traditional small magnetic field measurement to a large dynamic range; and through rapid feedback tracking, the magnetic measurement speed is improved, and the adaptability of magnetic measurement under different field intensities is enhanced.

Description

technical field [0001] The invention relates to the field of sensor technology, in particular to a high-speed and large dynamic range magnetic field measurement system. Background technique [0002] In today's scientific and technological development, accurate measurement of the magnetic field plays a vital role in many fields, such as deep-sea submarine detection, satellite and flying object navigation in national defense and military, and underground and underwater mineral resource detection in the field of resource development. , in the fields of medical and life sciences, there are magnetic detection, biomolecular detection, etc. The development of high-precision and high-stability magnetic measuring instruments is of great significance to the development of many scientific and technological fields. [0003] At present, the main methods for detecting weak magnetic signals include superconducting quantum interferometer (SQUID), Hall magnetometer, fluxgate magnetometer, o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
CPCG01R33/02
Inventor 武震宇陈浩王曹刘启慧程建功
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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