| 摘要 |
FIELD: analysis of gaseous atmosphere. SUBSTANCE: thermal catalytic element is placed into measurement camber and pulses of electric current are fed to it. Resistance Rtau<SB>0-1</SB> of thermal catalytic element at time moment in interval from tau<SB>0</SB> to tau<SB>1</SB> is measured in advance, where tau<SB>0</SB> is time moment from start of feed of pulse of electric current, tau<SB>1</SB> is time moment to start of oxidation reaction of combustible gases on surface of thermal catalytic element. Value of resistance Rtau<SB>1-2</SB> of thermal catalytic element at time moment in interval from tau<SB>1</SB> to tau<SB>2</SB> is measured, where tau<SB>2</SB> is time moment to start of formation of heated gas boundary layer around thermal catalytic element at which feed of pulse of electric current is stopped. Constant coefficient K=K = Rtau<SB>1-2</SB>/Rtau<SB>0-1</SB>. is found. After it present value of resistance Rtau<SB>1</SB> of thermal catalytic element at time moment tau<SB>1</SB> and present value of resistance Rtau<SB>2</SB> of thermal catalytic element at time moment tau<SB>2</SB>, are measured and value of resistance R<SP>0</SP>tau<SB>2</SB> = KRtau<SB>1</SB> of thermal catalytic element at time moment tau<SB>2</SB> is determined with zero presence of combustible gases in oxygen-carrying atmosphere and later ΔRtau<SB>2</SB> = Rtau<SB>2</SB>-R<SP>0</SP>tau<SB>2</SB> is found. Value ΔRtau<SB>2</SB> is used to evaluate value of concentration of combustible gases in oxygen-carrying atmosphere. EFFECT: provision for determination of integral explosion hazard of multicomponent gaseous atmosphere containing components noticeably differing by molecular mass, prolonged service life of thermal catalytic element and reduced energy consumption. 3 dwg |
