| 摘要 |
<p>The method of the invention lies in the fact that the selected component magnetic field, chosen preferably perpendicular to the dominant component of the external field maps in two perpendicular runways pairs probes oriented perpendicular to each other, so that the rotation of 90 ° probes respect to the axis of the cable to maintain the same measurement of selected components of the magnetic field (but the second pair of probes). For example, the first pair will map the vertical left and right of the centre section and a second cable at the top and bottom edges of the cable section. In each measuring point thus mapped within profit value of the selected components of magnetic field. Mapping pairs of probes moving in the directions perpendicular to each other with regard to cable cross section is practical and provides a lot more points than fixed measurement heads with Hall probes spaced in a circle. Previous methods measured radial and azimuthally component field variable external field contribution to the measured value depending on the position and orientation of the probe. When measured according to the invention is an external deposit box, printed and custom field distribution around the cable shall be mapped much denser network. The method is universal, but finds particular application in mapping their own fields of superconducting cables for the transport stream, where the cables for winding magnetic drums for thermonuclear fusion. The superconducting cables must map its own magnetic field, because the uneven distribution of power is the decrease of the theoretical capacity of current cable and limits its usefulness.</p> |
