Sequential activation of explosions

Details Sequential activation of explosions Sequential activation of explosions

F - Mech Eng,Light,Heat,Weapons

42

D

102/10

F42D 1/05 (2006.01) F42D 1/045 (2006.01) F42D 1/055 (2006.01)

Patent

CA 2008933

A B S T R A C T An electrical detonating system for sequentially acti- vating a series of explosions uses a harness which has a chain of resistors. Electrical detonators which fuse into an open circuit condition are connected between a power line and the junctions between the resistors. Constant current activating pulses are supplied to one end of the chain and the power line from a shot exploder. In order to ensure that each pulse only activates one detonator, the shot exploder is "intelligent" and terminates each pulse when it detects a voltage increase. The activating pulses may be supplied to a remote end of the chain of resistors via a further power line. The resistors may then be grouped and link elements provided between the groups and the further power line. These links are sequentially utilised to establish relo- cated start links between the shot exploder and the chain of resistors.

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