Multifunctional critical-current uniformity non-destructive and continuous detection device of superconducting band material

Abstract

The invention discloses a multifunctional critical-current uniformity non-destructive and continuous detection device of a superconducting band material. The multifunctional critical-current uniformity non-destructive and continuous detection device is characterized in that a pay-off disc and a take-up disc are respectively arranged above the left upper part and the right upper part of an opened Dewar bottle which contains liquid nitrogen; the pay-off disc, the take-up disc and the Dewar bottle are respectively arranged in a sealing box; the Dewer bottle is internally provided with a guide wheel I, a guide wheel II, an excitation device, a magnetic-field measuring instrument and a guide wheel III in sequence from left to right; a height-adjustable top guide wheel is also arranged between the guide wheel I and the guide wheel II; an encoder is arranged above the left side of the guide wheel I or the right side of the guide wheel III of the Dewar bottle; and the excitation device, the magnetic-field measuring instrument, the encoder, a laser range finder I and a laser range finder II are respectively and electrically connected with a monitoring and controlling system. The multifunctional critical-current uniformity non-destructive and continuous detection device disclosed by the invention has the advantages that on the basis of testing the critical-current uniformity of the superconducting band material in a non-contact and continuous manner, the length of the band material also can be measured, the destructed position is accurately positioned, the change of the characteristic of the critical current of the band material can be tested when the tension and the bending degree are variable, and the destruction to the superconducting band material is less in testing.

Description

technical field [0001] The invention relates to a non-destructive continuous detection device for the critical current uniformity of a multifunctional superconducting strip. Background technique [0002] With the maturity of superconducting materials, especially superconducting tape technology, it has been more and more widely used in industry. The current-carrying performance of superconducting tape, especially the uniformity of its critical current, is an important engineering index to measure superconducting tape. The magnetic signal test method is to pass the superconducting strip through the magnetic field and measure its residual magnetic field. The uniformity of the critical current of the superconducting strip can be measured through the uniformity of the residual magnetic field. It can continuously test the critical current characteristics (uniformity) of superconducting strips in a non-contact manner, and is currently the mainstream method used in the world to tes...

AI Technical Summary

Problems solved by technology

The existing problems are: 1. The tension controller is used to control the tension, which requires a small wrap angle, and the superconducting strip is easy to reduce its performance due to too small bending radius

2. The test device cannot realize the measurement of the length of the strip and the precise positioning of the position of the damage (the magnitude of the critical current change is greater than the specified range)

3. When the strip of the pay-off reel is finished, the test device cannot be stopped in time, so that the strip at the end of the pay-off reel is damaged due to excessive tension

4. The function is single, and it is impossible to test the change of the critical current characteristics of the strip when the tension and curvature are changed.

Images