FIELD: automatics of control and communication, including electronic fire alarms.
SUBSTANCE: fire alarm device consists of loop with sensors, producing thermo-EMF, value, which depends on temperature of closest zone of surrounding space of sensors, amplifier, power source, block of sound and light signaling block for processing level of voltage produced by amplifier. Result is achieved due to production of address voltage impulse, duration of which is unambiguously connected to premises address. Generation of voltage impulse: "fire", "breakage" or "short circuit" occurs, if voltage level at loop output exceeds certain value and certain duration of this voltage level exceeds maximal duration of interference.
EFFECT: increased information capacity of message about address and type of conditions which caused the alarm, and also increased stability of time parameters of messages in broad temperature alternation range.
2 dwg
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