AUTONOMOUS SIGNAL-START FIREFIGHTING SYSTEM Russian patent published in 2018 - IPC G08B17/06 

FIELD: fire safety.

SUBSTANCE: autonomous signal-start firefighting system contains a series-connected thermal starter 1, a current source 2 with a pyrotechnic activator 3, a time relay 4, a signal device 5, an actuator 6, a housing 7, a rod 8, a compression spring 9, an end portion 10 of a springed rod 8, a heat sensitive clamp 11, a solenoid 12, a central axial channel 13, terminals 14, an incandescent bridge 15, a weighed portion of initiating substance 16, an end portion 17 of a springed rod 8, an edge spear 18, a capsule 19, a sealed casing 20, solid stick 21, electrical outputs 22. The transmitter comprises a master oscillator 23, n is a drop-out delay line 24.i (i = 1, 2, …, n), a phase-inverter 25.j (j = 1, 2, …, m), an adder 26, a power amplifier 27, and a transmitting antenna 28. The receiver includes a receiving antenna 29, a high frequency amplifier 30, mixers 31 and 47, a sawtooth voltage generator 32, heterodynes 33 and 46, intermediate frequency amplifiers 34 and 48, a FM signal detector 35, spectrum analyzers 36 and 38, phase doubler 37, comparison block 39, threshold blocks 40 and 50, delay lines 41 and 44, switches 42 and 51, a phase detector 43, a registration block 45, a correlator 49, a narrowband filter 52, phase-inverter circuits 53, 56 and 59, adders 54, 57 and 60, bandpass filters 55 and 58.

EFFECT: increase selectivity and noise immunity of the receiver by suppressing false signals received through the forward channel and intermodulation channels.

9 dwg