METHOD OF TESTING SYSTEMS COMPRISING ELECTROEXPLOSIVE DEVICES FOR RESISTANCE TO ACTION OF EXTERNAL ELECTROMAGNETIC FIELDS IN OBJECTS AND DEVICE THEREFOR Russian patent published in 2016 - IPC G01R31/00 

FIELD: blasting operations.

SUBSTANCE: invention relates to testing systems comprising electroexplosive devices. Method comprises generating test electromagnetic fields, external in relation to tested object, with specified radiation parameters, which are measured by a field sensor arranged nearby tested object, and estimating level of induced currents in tested object. Method comprises controlling operating modes of testing system with provision of accurate time synchronisation of operation of all elements of system with a radiating antenna forming external test electromagnetic field with given spatial and polarisation parameters of radiation. Experimental data is processed and test results are recorded. Estimating level of induced currents is performed simultaneously for all electroexplosive devices, arranged in different local areas of test object, by measuring temperature of two equivalents of igniters and body of each electroexplosive device using a multichannel optical interrogator with temperature sensitive elements on fibre-optic Bragg gratings, spatial resolution which enables selection of different frequencies Bragg gratings. Level of induced current in each filament igniter is estimated from values of temperature differences between each equivalent filament igniter and temperature of housing of electroexplosive device, measured after completion of transient process, caused by effect of test electromagnetic field, with subsequent conversion of temperature difference into level of induced current, taking into account calibration characteristics of each sensitive element on fibre-optic Bragg grating, and resistance of electroexplosive device is determined by comparing estimates of induced current of each filament with current of operation of this electroexplosive device taking into account normalised coefficient of protection.

EFFECT: technical result consists is improved efficiency of field tests of large-size objects.

8 cl, 5 dwg