Laser heating nuclear magnetic resonance gyroscope

Abstract

The invention provides a laser heating nuclear magnetic resonance gyroscope, which consists of: a quartz vacuum chamber, an atomic gas chamber, a 3D orthogonal coil, a heating laser light source, an optical fiber temperature measurement module, a pumping laser light source, a detection laser light source, a balance photoelectric amplifier, and a lock-in amplifier. Specifically, the lock-in amplifier analyzes the amplified detection optical signal output by the balance photoelectric amplifier and a reference drive signal of the 3D orthogonal coil to obtain the reference drive signal's frequencycomponent information of the 3D orthogonal coil in the balance photoelectric amplifier, and the frequency component information is sent a programmable logic controller; the programmable logic controller controls the power of the heating laser light source according to the surface temperature of the atomic gas chamber, and resolves the larmor precession frequency information of the nuclear magnetic resonance gyroscope according to the frequency component information. The laser heating nuclear magnetic resonance gyroscope provided by the invention can thoroughly eliminate complementary magneticfield interference caused by electrical heating and resistance temperature measurement, and can effectively improve the detection precision and sensitivity of the nuclear magnetic resonance gyroscope.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance gyroscopes, in particular to laser heating nuclear magnetic resonance gyroscopes. Background technique [0002] The working principle of the nuclear magnetic resonance gyroscope is that the inert gas nucleus is in the nuclear magnetic resonance state, and the Larmor precession frequency of the inert gas nucleus is detected. When the detection laser rotates with the shell, the detected Larmor precession frequency deviates from the theoretical Larmor precession Frequency, the deviation of Larmor precession frequency is the shell speed. Compared with the traditional mechanical gyroscope, the sensitive substance of the nuclear magnetic resonance gyroscope is the nucleus, and there is no angular velocity of the sensitive shell of the mass component, so the influence of friction and inertial acceleration is eliminated. The nuclear magnetic resonance gyroscope can be applied to vibrati...

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Problems solved by technology

[0004] It can be seen from the above working principle of the NMR gyroscope that the spin polarization of alkali metal electrons is one of the necessary conditions for the normal operation of the NMR gyroscope. Under normal temperature conditions, the alkali metal electrons are solid, and the alkali metal electrons in the atomic gas chamber Low concentration leads to low polarizability of alkali metal electrons. In order to improve the spin polarizability of alkali metal electrons, the common method is to heat alkali metal electrons. The heating method commonly used in engineering is electric heating. The basic principle is to use current to pass through The heat generated during resistance is used to heat the atomic gas chamber, and the alkali metal in the atomic gas chamber is heated by heat conduction. After searching the p...

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