DEVICE FOR CONTROL OF CONCENTRATION OF DANGEROUS GASES Russian patent published in 2017 - IPC G01N27/12 

FIELD: measuring equipment.

SUBSTANCE: invention is intended for environmental monitoring, in particular for automatic continuous monitoring of the concentration of combustible gases (methane - CH₄, oxygen - O₂ and carbon monoxide - CO) in residential, communal and industrial buildings in order to detect the excess of permissible concentrations and timely take effective measures to reduce gas pollution. Device for monitoring the concentration of dangerous gases contains methane sensors CH₄ 1, carbon monoxide CO 2 and oxygen O₂ 3, amplifier 4 signals, analogue switch 5, analogue-digital converter 6, micro-computer 7, memory element 8, information display 9, alarm device 10, interface device 11 with the personal computer, control device 12, clock 13, power supply unit 14, relay windings 15, 16 and 17, multivibrator 18, multivibrator relay coil 19, transmitter 20, generator 21, modulating code generator 22, phase manipulator 23, telegraph key 24, power amplifier 25, and transmit antenna 26. The remote-control station contains receiving antenna, high frequency amplifier, tuner, heterodyne, mixer, intermediate frequency amplifier, phase shift keying detector, spectrum analyzers, phase doubler, comparator, threshold block, delay line, key, buzzer, phase divider, narrowband filter, phase detector, registration unit, phase stabiliser of the reference voltage, frequency detector, trigger and double balanced switch.

EFFECT: improvement of noise immunity and the reliability of determining the identification number of premises, buildings, where a leakage of dangerous gases occurred, by eliminating the phenomenon of reverse operation of the second type.

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