A shape memory alloy levitation device for micro-force measurement of superconducting magnetic levitation

Abstract

The invention discloses a shape memory alloy floating device for superconducting magnetic levitation microforce measurement, and relates to the field of shape memory alloy application. The floating device comprises a sleeve, a sleeve cover, a support rod, a bias spring, a memory alloy spring and a linear bearing, wherein a lug boss is formed at the upper side of the middle part inside the sleeve for installing the linear bearing; the memory alloy spring is welded at the inner bottom end of the sleeve; the support rod is arranged in the memory alloy spring; the support rod can vertically move along the sleeve; the upper section of the support rod sequentially passes through the bias spring, the linear bearing and the sleeve cover from top to bottom, and finally passes through the sleeve cover; a floated object is placed at the upper side; a flange plate at the bottom end of the sleeve is connected with a refrigerating machine and a heat conducting structure; during the temperature reduction, the memory alloy spring is shortened; the support rod downwards moves under the effects of gravity and the bias spring, and the floated object is driven to downwards move; during the temperaturerise, the memory alloy spring is elongated, and the support rod upwards moves. The processing is easy; the cost is low; the operation is simple and convenient; the intelligentization is realized.

Description

technical field [0001] The invention relates to the application field of shape-memory alloys, in particular to a shape-memory alloy floating device for superconducting magnetic levitation micro force measurement. Background technique [0002] In the prior art, such as the high-temperature superconducting magnetic levitation micro-force measuring device researched by Beihang University, a floating device is designed, which uses a stepping motor to drive the support plate, so as to move the superconductor to a suitable position for measurement. It includes a horizontal support seat, a horizontal guide rail, a vertical support seat, a vertical guide rail, a linear bearing, a horizontal stepping motor, a vertical stepping motor, a lead screw and a supporting plate. When working, the vertical stepping motor drives the supporting plate to adjust the permanent magnet platform to the initial height, then cools down to make the superconducting platform enter the superconducting state...

AI Technical Summary

Problems solved by technology

The whole process requires manual manipulation of the stepper motor to change the position and height of the permanent magnet. This device is not only complex in structure, but also prone to operational errors due to the instability of human observation. On the other hand, the stepper motor will Generates vibrations, causing considerable disturbance to the movement of permanent magnets

In addition, the stepper motor has electromagnetic interference during operation, which will affect the precise measurement

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