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Miniaturized foldable nuclear magnetic resonance gyroscope gauge outfit

A nuclear magnetic resonance gyro and magnetic resonance technology, which is applied in the direction of steering induction equipment, etc., can solve the problems of nuclear magnetic resonance gyro head volume, large power consumption, coupling degree, and low integration, so as to facilitate optical installation and improve gyro signal Accuracy, the effect of improving the uniformity of heating temperature

Pending Publication Date: 2019-09-27
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic research mainly integrates the optimal design and control of a single device, and the optical, electrical, thermal, magnetic, and signal processing subsystems are designed separately. The meter volume and power consumption are still relatively large, and engineering development faces many problems; while abroad, the volume of the prototype developed by Northrop Grumman in 2014 has been reduced to about 10 cubic centimeters, and there is a large gap in the development of related technologies at home and abroad.

Method used

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  • Miniaturized foldable nuclear magnetic resonance gyroscope gauge outfit
  • Miniaturized foldable nuclear magnetic resonance gyroscope gauge outfit
  • Miniaturized foldable nuclear magnetic resonance gyroscope gauge outfit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1, such as figure 1 , 2 shown;

[0042] Miniaturized collapsible MRI gyro instrument head, including:

[0043] A magnetic resonance optical assembly (1); the magnetic resonance optical assembly (1) includes a pumping optical path assembly and a detection optical path assembly;

[0044]An integrated atomic gas chamber (2); the pump light path components work to form pump light, and the detection light path components work to form probe light. Cross-injection; the integrated atomic gas chamber is in the center of the intersection of two beam paths (2);

[0045] Foldable bobbin (3);

[0046] A three-axis coil flexible circuit board (4) for providing a three-axis magnetic field for the gyroscope; the three-axis coil flexible circuit board (4) is installed on the foldable coil skeleton (3).

Embodiment 2

[0047] Example 2, such as image 3 shown;

[0048] The difference between this embodiment and embodiment 1 is:

[0049] The pumping optical path components include micro-laser I (101), aspheric lens I (102), λ / 4 wave plate (103), mirror I (104), mirror II (105), mirror III (106), photodetector I (114),

[0050] Among them, the linearly polarized light generated by the micro-laser I (101) passes through the aspheric lens I (102) and is collimated in parallel. ) as pumping light incident on one side of the integrated atomic gas cell (2) to polarize the alkali metal in it, and the remaining pump light is emitted from the other side of the integrated atomic gas cell (2), and then goes through The reflector II (105) and the reflector III (106) are then injected into the photodetector I (114).

Embodiment 3

[0051] Example 3, such as image 3 shown;

[0052] The difference between this embodiment and embodiment 2 is:

[0053] After the pumping light passes through the mirror I (104), it is perpendicular to the surface of the quartz heating plate I (201) in the integrated atomic gas chamber (2), and after passing through the pumping light of the mirror III (106), it is connected to the micro laser I (101 ) produces linearly polarized light parallel to and vertically incident on the center of the photodetector I (114).

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Abstract

The invention discloses a miniaturized foldable nuclear magnetic resonance gyroscope gauge outfit, which adopts a magnetic resonance optical assembly to highly integrate all optical element components, so that the volume of an optical element is effectively reduced; two paths of probe light detection units can work independently, two paths of independent nuclear precession signals can be provided, the system redundancy is improved, and the gyro precision is also correspondingly improved; non-magnetic heating systems necessary for work of an integrated atomic gas chamber are symmetrically integrated on four light-transmitting surfaces of the atomic gas chamber; the integration level and the heating temperature uniformity of the micro gas chamber are improved; a non-magnetic heating coil adopts a double-layer symmetrical structure with a magnetic field noise suppression function, so the interference of the magnetic field noise caused by a heating current on gyro signals is reduced, and the gyro signal precision can be further improved; a three-axis magnetic field coil adopts a foldable flexible coil structure, and a connecting circuit of an internal laser, the heating coil and the like is integrated, so that the electromagnetic interference of a wire in a magnetic shielding system is effectively reduced, and the size of the gyroscope gauge outfit is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of atomic sensors, in particular to a miniaturized foldable nuclear magnetic resonance gyro instrument head. Background technique [0002] The nuclear magnetic resonance gyroscope is a new type of solid-state gyroscope based on the principle of nuclear magnetic resonance, which comprehensively uses technologies in the fields of quantum physics, laser, electromagnetic and microelectronics. With the advantages of precision, small size, low power consumption and strong anti-interference ability, it has strong application potential in the field of navigation and guidance for the defense industry and the national economy. [0003] As a kind of precision instrument system, nuclear magnetic resonance gyro integrates pumping and detection optical systems, alkali metal gas chambers, non-magnetic heating systems, three-axis magnetic field generation systems, magnetic shielding devices, and signal processing and contro...

Claims

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Application Information

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IPC IPC(8): G01C19/62
CPCG01C19/62
Inventor 杨飞朱明智汪宝旭舒强邓东阁吴文凯邱勇
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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