METHOD FOR SETTING A REFERENCE TIME IN A MICROCONTROLLER, AND ELECTRONIC DETONATOR USING THE METHOD

摘要

The present invention relates to an electronic detonator using a method for setting a reference time in a microcontroller, which detonates precisely after a delay time elapses in accordance with the command from a main control device, such as a detonator blast delay time setup command, blast command, and the like, wherein the electronic detonator comprises: a rectifier circuit for rectifying the source signal received from the main control device; a power storage circuit connected to an output of the rectifier circuit, which supplies power divided by a voltage-dividing circuit to a microcontroller; a blasting energy storage circuit which supplies energy divided by the voltage-dividing circuit to the detonator; a switching circuit for supplying energy stored in the blasting energy storage circuit to the detonator; a shunt circuit interconnected between the switching circuit and the detonator to protect the detonator from a sudden electrical impact applied by an external source; and said microcontroller, which operates a timer in accordance with the method for setting a reference time in a microcontroller as described in claim 1, so as to control the switching circuit and to enable the detonator to detonate after a detonator blast delay time elapses. The electronic detonator of the present invention can be ignited and detonated in a sequence while maintaining a remarkably precise, significantly short time difference in the delay time of 1/1,000 of a second. The electronic detonator of the present invention is advantageous in that vibration and noise caused by blasting are reduced, fragmentation in a blasting site is improved, and the costs of controlling an excessive excavation during the construction of a tunnel can be significantly reduced.