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Nuclear magnetic resonance atomic gyroscope based on multiple reflection cavities and implementation method

A technology of atomic gyroscope and nuclear magnetic resonance, applied in the direction of steering induction equipment, etc., can solve the problem of not seeing more reports on the test results of the whole machine, and achieve the effect of eliminating the need for optical path adjustment, simplifying the system, and realizing closed-loop continuous work

Pending Publication Date: 2021-03-26
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Other domestic units are currently conducting more research on the accessory module of the nuclear magnetic resonance gyroscope, and the test results of the whole machine have not seen more reports

Method used

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  • Nuclear magnetic resonance atomic gyroscope based on multiple reflection cavities and implementation method
  • Nuclear magnetic resonance atomic gyroscope based on multiple reflection cavities and implementation method
  • Nuclear magnetic resonance atomic gyroscope based on multiple reflection cavities and implementation method

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] like figure 1 As shown, the test of the present invention is carried out in a 5-layer magnetic shielding barrel made of permalloy, and the magnetic shielding barrel can shield the interference of the earth's magnetic field and the external stray magnetic field. The atomic pool containing the Herriott multi-reflection cavity is the core part of the atomic gyroscope. When the atomic gyroscope is working, it uses the atoms inside the atomic pool to measure the rotation information. The atomic gas chamber is used with a 3D printing platform, which saves the step of adjusting the optical path. In actual work, the atoms need to be at about 110°C, because high temperature can get a larger signal, thereby improving the signal-to-noise ratio. In order to achieve this working temperature, two self-designed non-magnetic heating plates are used to heat the atomi...

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Abstract

The invention relates to a nuclear magnetic resonance atomic gyroscope based on multiple reflection cavities and an implementation method. The nuclear magnetic resonance atomic gyroscope is characterized in that two isotope gases of alkali metal atoms and xenon are filled into a gas chamber containing the multiple reflection cavities; polarization is transferred to nuclear spins of inert gas atomsby spin exchange collisions of polarized alkali metal atoms; the inert gas atoms are continuously driven by the excitation magnetic field, and the frequency of the inert gas atoms is kept resonant through the phase-locked loop to realize closed-loop work of the gyroscope; a Herriott multi-reflection cavity is introduced into the atom pool to improve the sensitivity of the system, and meanwhile, the interference caused by the introduction of an additional modulation magnetic field can be avoided, so that the stability of the system is improved; and a built-in rubidium atom magnetometer is usedfor obtaining nuclear spin signals of xenon atoms, rotation information measured by nuclear spin is obtained, and the function of the gyroscope is achieved.

Description

technical field [0001] The invention relates to the field of atomic devices, in particular to a nuclear magnetic resonance gyroscope based on nuclear magnetic resonance technology, which uses multiple reflection cavities to improve sensitivity and system stability and a realization method. Background technique [0002] As the core component of inertial measurement, gyroscope has always been widely concerned, and has huge demand in military and civilian fields. Among them, the atomic gyroscope has developed rapidly in recent years, and has made rapid progress in performance and practicality. It has good application prospects in basic physics research, aviation, aerospace, navigation and traffic navigation, which are closely related to inertial measurement. At present, the field of atomic gyroscopes is mainly divided into gyroscopes using atomic spin and atomic interference. Gyroscopes that use atomic spin correlation can be divided into compensation gyroscopes and nuclear m...

Claims

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Application Information

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IPC IPC(8): G01C19/60
CPCG01C19/60
Inventor 郝传鹏盛东
Owner UNIV OF SCI & TECH OF CHINA
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