The invention discloses a multifunctional composite
fuze circuit of a fire extinguishing bullet, in which the control over emission and
initiation of explosion of a
fuze is realized by using double singlechips, an instantaneous acceleration value of the fire extinguishing bullet is acquired by using a micro electromechanical
system (MEMS) acceleration
chip, and deprotection of the
fuze is determined by using a
time integral which reaches an acceleration threshold. In the fuze circuit, a path of singlechip is used for finishing communication and information interaction with a
control system according to different power-up states or is used for controlling the emission of the fire extinguishing bullet, power-up of the fuze at the head of the fire extinguishing bullet, the
initiation of explosion of the fire extinguishing bullet and the like; the other path of singlechip is united with the MEMS acceleration
chip to finish protection and the deprotection of the control over the
initiation of explosion of the fuze; thus the function of an electronic safety and arming
system is realized. The entire fuze circuit realizes functions of control over fire extinguishing bullet ignition, time fuze,
impact fuze, Doppler
altimeter fuze and acceleration electronic safety, and is a multifunctional composite fuze circuit.