Bending characteristic measurement device for high-temperature superconducting tape

Abstract

The invention relates to a bending characteristic measurement device for a high-temperature superconducting tape. The bending characteristic measurement device comprises a high-temperature superconducting tape measurement current providing part, a high-temperature superconducting tap bending radius providing part, a high-temperature superconducting tape voltage measurement part, a liquid nitrogenvessel and a controller, wherein the controller is used for controlling operations of the high-temperature superconducting tape measurement current providing part, the high-temperature superconducting tape bending radius providing part and the high-temperature superconducting tape voltage measurement part so as to obtain the bending characteristic of the high-temperature superconducting tape. According to the measurement device, the high-temperature superconducting tape bending radius providing part comprises a stepless bending radius providing part, and a measured high-temperature superconducting tape is kept to be attached to the outer surface of the stepless bending radius providing part in a measuring process, so that a continuously changing bending radius in a preset bending radius range can be acquired to the measured high-temperature superconducting tape when the stepless bending radius providing part moves. According to the bending characteristic measurement device provided bythe invention, the bending characteristic of the high-temperature superconducting tape can be measured in high accuracy.

Description

technical field [0001] The invention relates to the technical field of high-temperature superconducting strips, in particular, the invention relates to a device for measuring bending characteristics of high-temperature superconducting strips. Background technique [0002] In practical applications, superconducting strips will be subjected to mechanical stress. For example, superconducting strips are often wound into coils. The effect of the strip critical current has to be considered. That is to say, in order not to affect the performance of the superconducting strip, the winding bending radius of the superconducting strip must be limited within a certain range. It is generally believed that the superconducting strip is bent with a certain bending radius, and when the critical current drops to 95% of the critical current without any bending, the corresponding bending strain or bending radius is the critical bending strain or bending radius of the superconducting strip . ...

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Problems solved by technology

[0004] In the high-temperature superconducting strip bending performance testing machine disclosed in the above-mentioned patent documents, the curvature cone wheel is composed of a plurality of concentric cylinders with different radii, so it is impossible to measure the bending characteristics of the continuous bending radius of the high-temperature superconducting strip , so it is impossible to obtain accurate bending characteristic curve data of high-temperature superconducting strips

Moreover, in the high-temperature superconducting strip bending performance testing machine disclosed in the above-mentioned patent documents, both the movement of the superconducting strip and the movement of the curvature cone wheel need to be carried out manually, so the operation is cumbersome, and it is easy to affect the measurement accuracy.

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