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Miniature nuclear magnetic resonance gyroscope

A nuclear magnetic resonance and atomic gyroscope technology, applied in the field of inertial measurement, can solve the problems of difficult engineering application and bulky, and achieve the effect of improving gyro accuracy, ensuring measurement accuracy, and facilitating coating

Active Publication Date: 2016-04-20
FLIGHT AUTOMATIC CONTROL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is: to overcome the defects that the existing nuclear magnetic resonance gyroscope prototype is bulky and difficult for engineering application, and propose a nuclear magnetic resonance atomic gyroscope with small volume and high precision

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  • Miniature nuclear magnetic resonance gyroscope
  • Miniature nuclear magnetic resonance gyroscope
  • Miniature nuclear magnetic resonance gyroscope

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and the present invention will be further described:

[0026] see figure 1 , The miniaturized nuclear magnetic resonance gyroscope of the present invention relates to a design of a nuclear magnetic resonance gyroscope, which includes a vacuum chamber filled with a mixed gas of alkali metal and inert gas, and the top of the vacuum chamber is coated with a reflective film. A vertical cavity laser delivering the desired beam is placed at the bottom of the gas cell. Two detectors are placed symmetrically on both sides of the laser to detect the rotational speed signal. Helmholtz coils are arranged on both sides of the vacuum chamber to generate a transverse oscillating magnetic field. The optical system composed of a vacuum chamber, a laser, and a Helmholtz coil surrounded by a helical coil is used to generate the static magnetic field required for the Larmor precession of the atomic nucleus, and the external of the helical c...

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Abstract

The invention belongs to a gyroscope device in the field of inertia measurement and relates to a miniature nuclear magnetic resonance atomic gyroscope. The miniature nuclear magnetic resonance atomic gyroscope comprises a vacuum room filled with alkali metal and a gas mixture of inert gases. The inside of the top of the vacuum room is plated with a reflective film. A laser for releasing light beam used for pumping and detection is arranged at the bottom of the vacuum room. Two detectors are symmetrically arranged at two sides of the laser and are used for detecting rotation speed signals. Helmholtz coils used for generating a transverse oscillating magnetic field are arranged at two sides of the vacuum room. Solenoid coils used for generating a static magnetic field required by Larmor precession of atomic nucleus surround an optical system composed of the vacuum room, the laser and the Helmholtz coils. The outside of the solenoid coils adopts a shielding structure for magnetic shielding. Volume of the gyroscope is reduced, influence of jitter due to light intensity on precision of the gyroscope is effectively lowered, and precision of the gyroscope is enhanced.

Description

technical field [0001] The invention belongs to a gyroscope device in the field of inertial measurement, and relates to a miniaturized nuclear magnetic resonance atomic gyroscope. Background technique [0002] The concept of nuclear magnetic resonance gyro originated in the 1960s. Its principle is to use the Larmor precession frequency change of the atomic nucleus caused by the rotation of the carrier to measure the rotation speed of the carrier. [0003] The nucleus has a magnetic moment, put it in the static magnetic field B 0 , the nuclear magnetic moment will undergo Larmor precession around the magnetic field: [0004] ω 0 =γB 0 (1) [0005] When the carrier rotates around the static magnetic field, the Larmor angular frequency measured in the carrier changes, by measuring the Larmor frequency ω in the carrier obs The angular velocity of the carrier can be determined. [0006] Ω=γB 0 -ω obs (2) [0007] The traditional NMR gyroscope uses a separate pumping ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/60
CPCG01C19/60
Inventor 雷兴闻茗萱李俊李攀刘元正
Owner FLIGHT AUTOMATIC CONTROL RES INST
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