A magnetic compensation coil structural part for a miniature nuclear magnetic resonance gyroscope

Abstract

The invention provides a magnetic compensation coil structural component for a miniature nuclear magnetic resonance gyroscope, wherein a mandrel bracket is in a cylindrical shape, with an atomic gas chamber optical path component being arranged inside, and a wire winding groove as well as a paster groove being arranged on the outer wall thereof for fixing a transverse magnetic compensation coil and a vertical magnetic compensation coil. The vertical magnetic compensation coil is a circular Helmholtz coil structure enwound by a varnished wire; besides compensating a vertical residual magnetic field of the gyroscope, the vertical magnetic compensation coil is also used for providing a uniform static magnetic field for the gyroscope. The transverse magnetic compensation coil employs a saddle-type coil structure; the transverse magnetic compensation coil is used for compensation a transverse residual magnetic field of the gyroscope. The power is supplied to each coil independently; the coils are all printed on one flexible circuit board, sticking inside a mounting groove of the internal mandrel bracket in a bended manner. Comparing with the prior art, the magnetic compensation coil structural component is better in magnetic field evenness, more compact in structure, better in technology, easier to be installed, integrated and maintained.

Description

technical field [0001] The invention relates to the technical field of miniature nuclear magnetic resonance gyroscopes, in particular to a magnetic compensation coil structure used for miniature nuclear magnetic resonance gyroscopes, which is used to compensate the three-dimensional residual magnetic field of the gyroscope and provide a uniform longitudinal static magnetic field, which can be applied to Strategic and tactical weapons and equipment, miniature space vehicles. Background technique [0002] Miniature nuclear magnetic resonance gyroscopes have the characteristics of small size, low power consumption, high performance, and large dynamic range, and have become the research focus and hotspot of new inertial devices. [0003] The nuclear magnetic resonance gyroscope uses the Larmor precession of the nuclear spin magnetic moment to sense the rotation information of the object. In principle, it is necessary to prepare a uniform and stable static magnetic field in the l...

AI Technical Summary

Problems solved by technology

But since the magnetic shield is usually cylindrical, square Helmertz coils are not easy to install

Moreover, the uniformity of the magnetic field of the square Helmhertz coil is the best only when the coil spacing is equal to 1.1 times the coil side length, otherwise its uniformity will deteriorate rapidly

Such size requirements make the utilization rate of the internal space of the three-dimensional coil very low, which is not conducive to the miniaturization design of the nuclear magnetic resonance gyroscope

In addition, the three-dimensional square Helmertz coil constitutes a cage structure, which interferes with the internal optical path structure. Disassembling and debugging the square Helmhertz coil needs to destroy the internal optical path structure, and the maintainability is poor.

[0006] Theoretically, the saddle coil can also build a uniform magnetic field and has a compact structure, but the traditional enameled wire winding process cannot accurately construct the arc section of the saddle coil, and the magnetic field uniformity of the wound coil is far less than that of a square coil due to size errors. mhz coil

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