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Vibration noise correction and compensation method suitable for atomic interference gravimeter

A technology of vibration noise and compensation method, which is applied in the direction of instruments, scientific instruments, and gravitational field measurement. It can solve the problems of no solution, active and effective suppression of vibration and noise, cumbersome and difficult problems, increase the complexity and volume of the device, and achieve accurate measurement results. Effect

Active Publication Date: 2019-02-01
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0012] However, the active and effective suppression of vibration and noise is very cumbersome and difficult, and will increase the complexity and volume of the device, and there is currently no effective solution

Method used

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  • Vibration noise correction and compensation method suitable for atomic interference gravimeter
  • Vibration noise correction and compensation method suitable for atomic interference gravimeter
  • Vibration noise correction and compensation method suitable for atomic interference gravimeter

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The embodiment of the present invention provides a vibration noise correction and compensation method suitable for the atomic interference gravimeter. The method comprehensively processes the measured three-dimensional vibration signals of the Raman optical mirror to obtain a more accurate vibration of the gravimeter. The phase shift caused by this phase shift is used to obtain more accurate measurement results after subtracting the vibration...

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Abstract

The invention discloses a vibration noise correction and compensation method suitable for an atomic interference gravimeter. The method comprises the steps of: collecting vibration signals of three dimensions of a Raman light mirror; performing preprocessing including denoising and distortion correction on the vibration signals of three dimensions; correcting the coupling of the vibration signalsof three dimensions after preprocessing to obtain the phase shift caused by the vibration in a corrected vertical direction; and subtracting the phase shift caused by the vibration in the corrected vertical direction by using the relationship between the vibration signals of three dimensions recorded in advance and an atomic population signal of the gravimeter to obtain the atomic population signal of the gravimeter without vibration noise. The vibration noise is greatly eliminated, and the sensitivity and stability of gravity measurement are improved by means of the above vibration noise correction and compensation method.

Description

technical field [0001] The invention relates to the field of gravity measurement, in particular to a vibration and noise correction and compensation method suitable for an atomic interference gravimeter. Background technique [0002] The atomic interferometric gravimeter can measure the absolute value of the acceleration of gravity. Compared with the traditional laser interferometric absolute gravimeter, it has the advantages of high measurement frequency and high potential sensitivity. It can be widely used in inertial navigation, geophysical research, resource exploration and other fields. [0003] In the atomic interference gravimeter, the trapped atoms are cooled by laser, and the atoms with narrow-band velocity distribution are obtained after state preparation and velocity selection. Such as figure 1 What is shown is that two Raman laser beams are combined and act on the atomic group through a beam expander collimator and a mirror. The Raman light 1 shown and the Raman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/06G01V13/00
CPCG01V7/06G01V13/00
Inventor 陈斌杨胜军陈帅潘建伟
Owner UNIV OF SCI & TECH OF CHINA
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