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A dual-nuclear spin magneto-induced frequency shift suppression method

A nuclear spin and frequency shift technology, applied in steering induction equipment and other directions, can solve the problems of nuclear spin precession frequency offset error, and the difficulty of removing the active magnetic compensation of atomic magnetometers.

Active Publication Date: 2021-09-14
BEIJING AUTOMATION CONTROL EQUIP INST
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Problems solved by technology

Because the magnetic field generated by the nuclear spin and the electron spin can be felt by the other party, the nuclear spin feels the magnetic field generated by the electron spin, and the two nuclear spins in the nuclear magnetic resonance gyroscope feel the difference in the magnetic field of the electron spin, and the atomic magnetometer actively Magnetic compensation is difficult to remove, causing nuclear spin precession frequency offset error

Method used

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  • A dual-nuclear spin magneto-induced frequency shift suppression method
  • A dual-nuclear spin magneto-induced frequency shift suppression method
  • A dual-nuclear spin magneto-induced frequency shift suppression method

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Embodiment Construction

[0033] A dual-nuclear spin magneto-induced frequency shift suppression method, comprising the steps of:

[0034] Step 1: Heating

[0035] The non-magnetic heating component 5 is installed to heat the atomic gas chamber 10 to above 120° C. for increasing the atomic density. The interior of the atomic gas chamber 10 contains two nuclear spins of inert gases sensitive to angular motion, electron spins of alkali metal atoms, and other auxiliary function gas atoms N 2 .

[0036] Step Two: Polarization

[0037] A beam of driving laser light 1 sequentially passes through a three-dimensional coil 11, a polarizer 2, and a circular polarizer 3, and is vertically injected into one surface of the atomic gas cell 10, and its incident direction is defined as the positive direction of the Z axis, which is used to polarize the alkali metal atoms The electron spin transfers the photon angular momentum to the electron spin, so that the polarizability of the electron spin reaches P. The thre...

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Abstract

The invention belongs to an error elimination method, in particular to a double-nuclear spin magneto-induced frequency shift suppression method. It includes: step 1: heating, set in the non-magnetic heating component to heat the atomic gas chamber to above 120 ° C, step 2: polarization, step 3: resonance, step 4: detection, make the detection laser enter the atomic gas through the polarizer chamber to detect the resonant frequency. Step 5: Flip electron spin polarization direction, Step 6: Calculate. The effect of the application is: the application proposes a dual-nuclear spin magneto-induced frequency shift suppression method, its main advantage is that on the basis of the active magnetic compensation of the atomic magnetometer, the dual-nuclear spin magnetically induced frequency shift error drift is suppressed, thereby Improve the bias stability of the gyro.

Description

technical field [0001] The invention belongs to an error elimination method, in particular to a double-nuclear spin magneto-induced frequency shift suppression method. Background technique [0002] Based on the cutting-edge research progress of atomic manipulation technology, nuclear magnetic resonance gyroscope has comprehensive advantages such as high precision, small size, pure solid state, and acceleration insensitivity. It is one of the main development directions of high-precision, micro-miniature gyroscope technology in the future. The NMR gyroscope needs to shield the ambient magnetic field to isolate the influence of the magnetic field on the measurement of nuclear spin precession. Generally, the scheme of "passive magnetic shielding based on high magnetic permeability material + active magnetic compensation based on atomic magnetometer" is adopted. Passive magnetic shielding generally only achieves 10 5 ~10 6 The magnetic field attenuation coefficient on this ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/60G01C19/62
Inventor 秦杰万双爱孙晓光
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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