DEVICE FOR RECORDING EXCEEDANCE OF METHANE SAFE CONCENTRATION LEVEL WITH RESPONSE TIME OF LESS THAN 0,8 s Russian patent published in 2009 - IPC G01N21/71 E21F17/18 

FIELD: electrical engineering.

SUBSTANCE: invention relates to devices for determining exceedance of methane safe concentration level, which can be used in mining and chemical industry in air and gas control systems. The device has a power supply for the sensor, unit for forced ignition of the gas mixture, comprising a voltage converter and an igniter, blast-proof combustion chamber, comprising an insulating plug and an inspection window, device for recording ignition of the gas mixture, comprising a photodetector and a unit for processing explosion information, unit for generating a signal from the sensor to the main cable line and into local signalling presence of a lower explosive limit of gas for the given sensor. The device also contains a unit for generating voltage in form of regular pulse sequences for forced ignition, a heater and a unit for regulating its temperature. One output of the voltage converter is connected to the input of the unit for generating voltage, and the other output is connected to the input of the unit for regulating temperature of the heater.

EFFECT: increased efficiency of control.

1 dwg