MEASUREMENT METHOD OF AMPLITUDE OF BIDIRECTIONAL PULSE OF MAGNETIC FIELD Russian patent published in 2014 - IPC G01R33/00 

FIELD: measurement equipment.

SUBSTANCE: at implementation of the method, two sensitive elements with a rectangular hysteresis loop are used, which are made from magnetic material having a coercitive force corresponding to the middle of a dynamic amplitude measurement range. When in an initial state, the first and the second sensitive elements are magnetised till saturation; then, they are placed at the test point of space and oriented in an opposite way. The first element is demagnetised with the first polarity of the determined pulse of a magnetic field, and the second one - with the second polarity. When the pulse to be determined is passed, first, as per residual magnetisation of the second sensitive element and its calibration chart obtained for a one-directional pulse, a value of the second polarity of the determined pulse of the magnetic field is evaluated; then, as per the value of the second polarity, residual magnetisation of the first sensitive element and its family of calibration charts obtained for one- and bidirectional pulses, an amplitude of the determined pulse of the magnetic field is evaluated.

EFFECT: possible application to pulses of a magnetic field in a dynamic range of intensities of hundreds of kiloamperes per metre at duration of pulses of tens of microseconds in monocyclic electromagnetic processes.

2 dwg