DEVICE FOR MONITORING AND UNDERMINING SEQUENTIAL CHAINS OF PYROCARTRIDGES Russian patent published in 2015 - IPC G08B17/00 A62C37/36 

FIELD: blasting operations.

SUBSTANCE: device comprises pyrocartridges with two threads, each of which is shunted by semiconductor device of restoring the integrity of an electric circuit with transition from closed to open state, the switching units of current of blasting, the control element, each switching unit is arranged on two key elements. The monitoring key are integrated, in parallel with each of the first and second thread of pyrocartridges the identification resistor is integrated, the control element is made in the form of first and second ohmmeter, the ohmmeter outputs are the control output of the device, the connection points of the first and second key elements with successive chains of threads of pyrocartridges are the technological circuits of pyrocartridge control of the device.

EFFECT: improvement of reliability, which increases the level of safety, ensuring the possibility of long-term memorisation of fact of triggering of pyrocartridges during normal operation and the possibility of undermining the pyrocartridge one by one.

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