SETTING, MONITORING AND MARKING METHOD OF ACTION TIME OF TIME BLASTING FUSE DEVICE Russian patent published in 2011 - IPC F42C9/00 

FIELD: blasting operations.

SUBSTANCE: data signals are formed with setting device and determine the required time of action of time device, time device forms chronometric pulses and conversion of data signals is performed during the action; at that, signals of setting device are formed in the form of two pulses. Time interval between pulses is equal to t_set. Time device using chronometric pulses following with frequency f_chron performs its conversion to N_set code. Output control pulses are formed to setting device by converting N_set code at pulse repetition interval T_contr, which is equal to ratio of N_set code to f_chron frequency of chronometric pulses. The obtained T_contr is compared by means of setting device to t_set interval between pulses earlier supplied with setting device, and when they coincide, shell start is permitted. During the travel the time device performs reckoning of action time T_action by converting N_set code during T_action. Corrections of the set action time during shell travel is performed with additional supply from pulse correction unit.

EFFECT: improving reckoning accuracy of set time, possibility of accurate control of its being received with time device and possibility of correcting the set time on shell travel trajectory.

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