High-temperature superconductive long tape critical current continuous measurement and rewinding device

Abstract

The invention discloses a high-temperature superconductive long tape critical current continuous measurement and rewinding device comprising a pay-off reel and a take-up reel and also comprising a liquid nitrogen tank, wherein the pay-off reel and the take-up reel are arranged above the liquid nitrogen tank; the top of the liquid nitrogen tank is provided with an inlet hole and an outlet hole; a pair of current introducing wheels and a pair of signal deriving wheels are arranged in the liquid nitrogen tank; the current introducing wheels are connected with a controllable direct-current power supply; and the signal deriving wheels and the controllable direct-current power supply are respectively connected with a monitoring system. The device also comprises a dehumidification device, a heating device, a marking device and the like. The invention not only can be used for safely and stably rewinding a superconductive long tape but also continuously measuring the critical current of the superconductive long tape. The position of a zone that the critical current does not reach the standard can also be marked by matching with the monitoring system and the marking device. The condition that the superconductive long tape is influenced in detection and application because the surface of the superconductive long tape is iced can be effectively avoided by utilizing the dehumidification device and the heating device. The invention has high degree of automation and cannot damage the superconductive tape in the use process.

Description

technical field [0001] The invention relates to a continuous measurement and rewinding device for critical current of a high-temperature superconducting long strip, which belongs to a detection device for superconducting cables. Background technique [0002] With the maturity of superconducting technology, the industrial application of superconducting cables will become more and more extensive. During the production and application of superconducting cables, various testing devices are required to test the quality of superconducting cables. [0003] Chinese utility model patent 200620135561.3 discloses a superconducting wire detection machine, which includes a pay-off reel, a take-up reel, a pay-off guide wheel, a take-up guide wheel and a detection probe. During the process of paying off and rewinding the superconducting wire by using the pay-off reel and the take-up reel, the probe can be used to perform surface quality inspection or internal flaw detection on the superco...

AI Technical Summary

Problems solved by technology

But this detector cannot test the critical current of the superconducting wire

[0004] Most of the current testing methods for the critical current of high-temperature superconducting strips can only test short strips, and the magnetic flux pinning method that can test long strips (by testing the magnetic flux pinning ability of superconducting strips to measure superconducting strips The critical current), the error is relatively large

At the same time, since the superconducting tape packaging reel of the superconducting tape manufacturer is generally different from the reel required for actual use, it must be rewound before use, and the superconducting tape is easily subjected to excessive external force during the rewinding process. Or because the bending radius is too small, the critical current of the strip is reduced or even damaged

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