Nuclear magnetic resonance gyroscope based on wide spectrum laser pumping

Abstract

The invention provides a nuclear magnetic resonance gyroscope based on wide spectrum laser pumping. The nuclear magnetic resonance gyroscope comprises a light path detection part, a pumping light path part, a polarized light path part, a photoelectric detection part, a signal demodulation circuit, an atomic gas chamber, a heating body, a magnetic compensation coil, a magnetic shielding body, an aluminum alloy shell, a laser drive power supply, a temperature control circuit and a magnetic field drive circuit. According to the nuclear magnetic resonance gyroscope, alkali metals are polarized by adopting broadband laser pumping, the line width of broadband laser is more than a superfine energy level splitting gap, and the polarizability of a working medium can be effectively improved. Moreover, an external magnetic field is attenuated by adopting the magnetic shielding body, current is applied to generate a magnetic field in the magnetic compensation coil so as to compensate the residual magnetic field, so that a disturbing magnetic field is effectively isolated. Furthermore, detected light is divided into two paths for performing detection and reception, a gyro signal can be acquired by virtue of difference processing, and gyro common-mode noise can be effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance gyroscopes, in particular to a nuclear magnetic resonance gyroscope based on wide-spectrum laser pumping, which can be applied to the guidance and control of strategic and tactical weapons and equipment. Background technique [0002] Gyroscopes can establish a constant coordinate system for moving objects. They are important tools for measuring the angular rate and angle of rotation of objects. They are the core information for strategic / tactical weaponry / platforms and space vehicles for attitude adjustment / control and autonomous / covert navigation. one of the sources. With the transformation of the traditional war mode to the joint combat mode of multi-dimensional battlefield space such as sea, land, air, space and electromagnetic, the development of small space vehicles, small missiles / combat platforms and other weapons and equipment has put forward higher requirements for the ...

AI Technical Summary

Problems solved by technology

In recent years, the University of California in the United States has tried to use MEMS technology to develop a miniature nuclear magnetic resonance gyroscope, but there are problems such as the difficulty of multi-layer coating on the inner wall, and the interference magnetic field introduced by the heating wire restricts the accuracy of the gyroscope.

In addition, Northrop Grumman uses passive assembly technology to develop micro-miniature nuclear magnetic resonance gyroscopes, but there are also problems such as difficult processes and poor repeatability.

In addition, NMR gyroscopes based on narrow-band (<100MHz) laser pumping have problems such as low polarization efficiency and high power consumption

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