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Inertia and magnetic field integration measuring method based on SERF (spin-exchange-relaxation-free) atomic spin effect

A technology of atomic spin and measurement method, applied in the size/direction of magnetic field, rotating gyroscope and other directions, which can solve problems such as unreported

Active Publication Date: 2013-12-11
BEIHANG UNIV +1
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Problems solved by technology

[0003] The inertial measurement device and the magnetic field measurement device based on the SERF atomic spin effect have ultra-high expected sensitivity. Many research institutions at home and abroad have carried out experimental research work, but the measurement technology integrating the two has not been reported.

Method used

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  • Inertia and magnetic field integration measuring method based on SERF (spin-exchange-relaxation-free) atomic spin effect
  • Inertia and magnetic field integration measuring method based on SERF (spin-exchange-relaxation-free) atomic spin effect
  • Inertia and magnetic field integration measuring method based on SERF (spin-exchange-relaxation-free) atomic spin effect

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Embodiment Construction

[0103] Such as figure 1 , 2 Shown, concrete method of the present invention is as follows:

[0104] 1. Establish the overall model of the inertial / magnetic field integrated measurement device. The overall model includes the inertial angular velocity measurement model based on the SERF atomic spin effect and the current feedback magnetic field measurement model based on the active magnetic compensation technology;

[0105] (1) The inertial angular velocity measurement model based on the SERF atomic spin effect includes the SERF state atomic spin dynamics model and the atomic spin precession detection model;

[0106] Under the influence of external magnetic field and rotational angular velocity, the polarizability of electron spin and nuclear spin can be described by Bloch equations as

[0107] ∂ P → dt = γ B → × ...

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Abstract

The invention provides an inertia and magnetic field integration measuring method based on an SERF (spin-exchange-relaxation-free) atomic spin effect. The inertia and magnetic field integration measuring method based on the SERF atomic spin effect comprises the following steps: firstly establishing an overall model for the inertia and magnetic field integration measurement; secondly, manufacturing a measurement sensing unit, and carrying out high-frequency alternating current non-magnetic electric heating; starting a driving laser (z-axis) for carrying out optical pumping on the sensing unit; and emitting a detection laser (x-axis) in a direction vertical to the z-axis; thirdly, carrying out driving magnetic compensation through a three-dimensional magnetic compensation coil so as to counteract a magnetic field of the outside world; fourthly, carrying out azimuth alignment on a main magnetic field and the driving laser and hyperpolarization nucleon self-spin so as to realize the nuclear spin-electron spin strong coupling; fifthly, extracting the information of the atomic spin precession movement in the detection laser by adopting a closed-loop faraday modulation detection method, and obtaining inertia angular speed information; and finally, obtaining the current value of a compensation signal of the magnetic field, and calculating to obtain the information of the current magnetic field. The inertia and magnetic field integration measuring method based on the SERF atomic spin effect has the characteristics of high measurement accuracy and strong autonomy.

Description

technical field [0001] The invention relates to an inertial and magnetic field integrated measurement method based on the SERF atomic spin effect, which can be used to study a new type of navigation system based on the combination of inertia and magnetic field. Background technique [0002] National defense and military require high-precision inertial navigation and guidance systems and extremely weak magnetic field measurement technology. At present, the difficulty of improving the accuracy of gyroscope has become the key to restrict the performance improvement of inertial navigation system. The existing high-precision gyroscopes mainly include rotor gyroscopes and optical gyroscopes, but they have encountered technical bottlenecks in further improving the accuracy. With the development of quantum control technology, the inertial measurement device based on the SERF atomic spin effect has become possible and has been verified in principle, which has become the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/02G01R33/02
Inventor 全伟郑慧婕房建成龙保华李洋刘翔吴双卿
Owner BEIHANG UNIV
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