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Method for measuring rotating angle of aircraft based on nuclear magnetic resonance

A technology of rotation angle and measurement method, applied in the direction of steering induction equipment, etc., can solve the problem of large measurement error, and achieve the effect of overcoming measurement error and increasing stability

Inactive Publication Date: 2014-01-22
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of existing nuclear magnetic resonance gyroscopes due to the large measurement error caused by the instability of the static magnetic field, and propose a new measurement method for aircraft rotation angular velocity detection gyroscopes

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  • Method for measuring rotating angle of aircraft based on nuclear magnetic resonance
  • Method for measuring rotating angle of aircraft based on nuclear magnetic resonance

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Embodiment Construction

[0018] One embodiment of the present invention is as figure 1 As shown, the aircraft rotation angle detection gyroscope applying the method of the present invention includes a nuclear magnetic resonance cavity, a pumping laser light source 6 for excitation, a pumping laser light source 7 for detection, an external reference frequency source 8, and a photodiode 9. The pump laser light source 6 for excitation is located below the nuclear magnetic resonance cavity, the pump laser light source 7 for detection is on the left side of the nuclear magnetic resonance cavity, the external reference frequency source 8 and photodiode 9 are on the right side of the nuclear magnetic resonance cavity, and the detection pump The centers of the pump laser light source 7, the external reference frequency source 8 and the photodiode 9 are located on the same straight line, which is perpendicular to the straight line where the center of the pump laser light source for excitation is located. Where...

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Abstract

The invention provides a method for measuring the rotating angle of an aircraft based on nuclear magnetic resonance. The method is characterized in that two isotope nucleuses with the same element and different gyromagnetic ratios serve as a measurement carrier of an aircraft rotating angle measurement gyroscope; an alkali metal element is added into a cylindrical glass sealed cavity in a nuclear magnetic resonance resonant cavity of the aircraft rotating angle measurement gyroscope based on a spin polarization exchange mechanism; electron spin polarization of alkali metal atoms is transferred to two isotopic atoms serving as the rotating speed measurement carrier of the gyroscope to cause net nucleus spin polarization of the two isotopic atoms. Therefore, the magnetic polarization strength of the isotopic measurement carrier can be improved, and a signal to noise ratio of a detected signal can be improved.

Description

technical field [0001] The invention relates to a measurement method for measuring the spin angle of an aircraft, in particular to a measurement method for a gyroscope for detecting the rotation angle of an aircraft based on the principle of nuclear magnetic resonance. Background technique [0002] The flight attitude control of aircraft is an important task in inertial navigation. During the flight, the high-speed rotation of the aircraft itself can maintain a stable flight direction. The gyroscope can effectively measure the real-time rotation angle or speed of the object, thus providing important technical parameters for flight navigation control. Traditional gyroscopes, such as mechanical gyroscopes and fiber optic gyroscopes, contain mechanical rotating parts and are very sensitive to motion overload and vibration, which have a certain impact on the design and function of gyroscopes. [0003] Chinese patent 2006101715882 "Optical fiber gyroscope using low-bias and pol...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/62
CPCG01C19/62
Inventor 李晓南牛超群刘国强夏慧
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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