PYRO DEVICE BLASTING INSTRUMENT Russian patent published in 2011 - IPC F42C11/04 

FIELD: blasting operations.

SUBSTANCE: pyro device blasting instrument includes power supply, electric blasting lines and keys some of which are connected to positive terminal of power source, and the other are connected to negative terminal of power source, microcontroller the outputs of which are connected to control inputs of keys; to the output of each key there also connected is monitoring scheme the output of each of which is connected to the appropriate input of microcontroller. In addition, there introduced are diodes; at that, control schemes and keys are divided into two groups, in one of which the key outputs are connected to anodes of diodes the cathodes of which through the appropriate electric blasting circuits are connected to outputs of keys of the other group respectively. Strobing inputs of the first and the second groups of the control scheme are connected to the appropriate strobing outputs of microcontroller.

EFFECT: improving reliability owing to simplifying the keys, reducing their number and complete automatic self-testing of instrument immediately prior to its application.

3 dwg