Magnetic suspension device used for measuring spherical spinner pole axis deflection angle and measurement method thereof

Abstract

A magnetic levitation device and measurement method used for measuring the angle of spherical rotor polar axes, including low-temperature Dewar (8), superconducting suspension coil (5), superconducting niobium-rotor (1), niobium watts (2), superconducting motor (6), torque (7), centre column (9), copper (10), polar axes optical fiber sensor (3) and rev speed optical fiber sensor (4). The Superconducting niobium-rotor (1) is arranged in the spherical cavity formed by the upper and the lower relative niobium watts whose inner surfaces are spherical, and sleeves on the center column (9); two circular superconducting coils (5) are sleeved on the upper and the lower Niobium watts (2). The top of the rotor is produced into plane with diffuse reflection graphic. Two optical axis of the optical fiber sensor are perpendicular to the top plane of rotor and fix in the copper (10). The measurement method of the invention is used for measuring the angle of spherical rotor polar axes, adopts the non-contact type reflection intensity modulated optical fiber sensor to measure the displacement offset signal of the rotor polar axes, and uses the sophisticated two-phase lock-in amplifier to process signal, which has high precision.

Description

technical field [0001] The invention relates to a magnetic levitation device for measuring the polar axis deflection angle of a rotor and a method for measuring the pole axis deflection angle of the rotor, in particular to a low temperature superconducting spherical rotor magnetic levitation device and a method for measuring the polar axis deflection angle of the spherical rotor. Background technique [0002] Under the action of the suspension force, the spherical rotor rotates around the polar axis at high speed and has a certain angular momentum, trying to keep the orientation of its rotation axis relative to the inertial space unchanged. This characteristic is widely used in positioning and orientation systems. At present, photoelectric reading schemes are used to measure the polar axis deflection angle of spherical rotors. One is the polar axis-equator D-shaped engraving scheme, that is, the intersection point between the rotor surface and the polar axis, that is, the pol...

AI Technical Summary

Problems solved by technology

These methods all need to engrave diffuse reflection patterns on the surface of the rotor, that is, the spherical surface, which is technically difficult, and the reflection effect of the spherical surface on light is also poor.

The second method requires the engraved line to be symmetrical to the equator, which is more difficult, and requires the use of four optical fiber sensors placed orthogonally to each other, which requires high installation accuracy and high cost

[0004] However, electrostatic levitation is an unstable levitation method. Electrostatic force is a divergent suction force. The displacement of the rotor in any direction will lead to greater attraction force in this direction. Sensitive components are required to detect the displacement, and the control device will feed back an adjustment balance The force, the stiffness is low, and a small disturbance will make the rotor deflect and hit the spherical cavity electrode, destroying the rotor, so the system is unstable

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