High precision static magnetic field generating device for nuclear magnetic resonance gyroscope

Abstract

The invention provides a high precision static magnetic field generating device for a nuclear magnetic resonance gyroscope. The device includes a coil support skeleton and a static magnetic field coil. Specifically, the coil support skeleton is cylindrical, and is internally equipped with an atom gas chamber and heating related structural parts, and the side wall of the coil support skeleton is provided with a plurality of symmetrically distributed annular winding grooves for fixing the static magnetic field coil. The static magnetic field coil consists of multiple groups of longitudinally symmetric circular coils, and the symmetric plane is a central cross section of the coil support skeleton, the coils are wound by one enamelled copper wire, and each group has the same number of windings. Through specific location distribution control, the high precision static magnetic field generating device provided by the invention can provide a high precision static magnetic field with extremely high uniformity for an area where the gas chamber of the nuclear magnetic resonance gyroscope is located. Compared with the prior art, the high precision static magnetic field generating device provided by the invention has the advantages of good magnetic field uniformity, more compact structure, easy installation and maintenance, and easy realization of engineering.

Description

technical field [0001] The invention relates to the technical field of magnetic field generation for nuclear magnetic resonance gyroscopes, in particular to a high-precision static magnetic field generator for nuclear magnetic resonance gyroscopes, which is used to generate high-precision, high-stability longitudinal magnetic fields required by the gyroscopes. It can be used in fields such as strategic and tactical weaponry, miniature space vehicles and the like. Background technique [0002] The nuclear magnetic resonance gyroscope has the characteristics of small size, low power consumption, high performance, and large dynamic range, and has become the research focus and hotspot of new inertial devices. The nuclear magnetic resonance gyroscope uses the Larmor precession of the nuclear spin magnetic moment to perceive the rotation information of the carrier. In theory, it is necessary to prepare a uniform, stable and high-precision static magnetic field in the longitudinal ...

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Problems solved by technology

[0003] At this stage, a pair of square Helmertz coils are often used as the static magnetic field generating device, but because the magnetic shielding is designed as a cylinder, it has a better shielding effect, and the use of square Helmertz coils is not easy to install and the utilization rate of space is very low , which is not conducive to the miniaturization design of the nuclear magnetic resonance gyroscope, and the square Helmertz coil has better magnetic field uniformity only when the coil spacing is equal to 1.1 times the coil side length, and the coil uniformity of other sizes is extremely poor, which is not conducive to Design and Arrangement of Gyroscope Internal Optical Path Structure

In addition, there is also the problem of using a circular Helmertz coil to overcome the space utilization rate in the magnetic shield, but the circular Helmertz coil will form a cage structure with the transverse magnetic field coil, which interferes with the internal optical path structure. When disassembling and debugging poor maintainability

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