Centering mechanism, centering installation method and maintaining method of zero-length spring type gravimeter

Abstract

The invention relates to a non-contact centering mechanism, a centering installation method and a maintaining method of a zero-length spring gravimeter. The centering mechanism comprises a radial magnetic levitation stator mechanism, a radial magnetic levitation rotor mechanism and a magnetic levitation peripheral control circuit. The radial magnetic levitation stator mechanism is fixedly connected with a gravimeter shell and comprises a gravimeter frame, an upper magnetic levitation stator assembly and a lower magnetic levitation stator assembly which are arranged in the frame, and a force generator stator assembly. The radial magnetic levitation rotor mechanism comprises a capacitance movable pole plate, a spring sleeve, a zero-length spring, an upper magnetic levitation rotor, a lower magnetic levitation rotor and a force generator rotor which are coaxially mounted in a centering manner; the magnetic suspension rotor mechanism is mounted in the magnetic levitation stator mechanism in a manner of moving along the radial direction and the axial direction; and the magnetic levitation peripheral control circuit is used for detecting the displacement of an air gap between the statorand the rotor and feeding back the information to the control loop, and the control loop matches the current for controlling the magnetic levitation coil according to the information. The mechanism issimple and reliable in structure, high in centering precision and small in centering threshold value.

Description

technical field [0001] The patent of the invention belongs to the field of precision instruments and meters, and relates to precision gravity measuring components such as a zero-length spring gravimeter, and in particular to a non-contact centering mechanism of a zero-length spring gravimeter. Background technique [0002] The traditional zero-length spring-type gravimeter adopts the centering structure of the radial wire drawing scheme. This structure has achieved good centering effect under large dynamic conditions, making the zero-length spring-type gravimeter achieve high precision under dynamic conditions. made great progress. With the continuous development of science and technology, higher requirements are put forward for the resolution and accuracy of the gravimeter. This structure achieves high radial stiffness by sacrificing the resolution. This kind of thinking can no longer meet the resolution requirements of the gravimeter. . Contents of the invention [000...

AI Technical Summary

Problems solved by technology

With the continuous development of science and technology, higher requirements are put forward for the resolution and accuracy of the gravimeter. This structure achieves high radial stiffness by sacrificing the resolution. This kind of thinking can no longer meet the resolution requirements of the gravimeter.

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