Dual-core spin magnetic frequency shift suppression method

A technology of nuclear spin and frequency shift, applied in the direction of steering induction equipment, etc., can solve the problems of nuclear spin precession frequency offset error, atomic magnetometer active magnetic compensation is difficult to remove, etc., to suppress error drift and improve zero partial stability effect

Active Publication Date: 2019-06-14
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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  • Dual-core spin magnetic frequency shift suppression method
  • Dual-core spin magnetic frequency shift suppression method
  • Dual-core spin magnetic 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, particularly relates to a dual-core spin magnetic frequency shift suppression method. The dual-core spin magnetic frequency shift suppression method comprises the steps that firstly, heating is conducted, specifically, an atomic chamber is heated to at least 120 DEG C in a non-magetic heating assembly, secondly, polarization is conducted, thirdly, resonance is conducted, fourth, inspecting is conducted, specifically, inspected laser enters the atomic chamber through polarizer, and resonant frequency is inspected; fifth, an electron spin polarization direction is overturned; and sixth, calculating is conducted. The dual-core spin magnetic frequency shift suppression method has the beneficial effects that on the basis of active magnetic compensation of an atomic magnetometer, dual-core spin magnetic frequency shift error drifting is compressed, and thus zero-bias stability of a gyroscope is improved.

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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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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