DEVICE PROTECTING BLAST SYSTEMS AGAINST OPERATION IN CASE OF SUPERNUMERARY ELECTRIC ACTION ON INITIATION CIRCUITS

摘要

FIELD: protective devices. SUBSTANCE: proposed device is designed to exclude any possibility of unauthorized operation of blasting system. Device is electron circuit which operation is based on control over high-power electric signal with the use of semiconductor thyristor to which anode in given case initiating pulse is fed from current pulse generator. Pulse from former of controlling action which is incorporated in circuit of device and is intended to create condition not allowing regular action to be simulated is sent to controlling electrode. Protection is achieved as moment of generation of control pulse is ahead of moment of generation of initiating pulse by value $$$ which later on to execute conditions of synchronous coming of both signals to input of thyristor is reduced to zero by setting of corresponding delay line in control circuit. Fuze links are installed in initiation and control circuits to exclude possibility of repeat feed of supernumerary electric action. EFFECT: exclusion of any possibility of unauthorized operation of blasting system.