G - Physics – 01 – N
Patent
G - Physics
01
N
354/30
G01N 25/54 (2006.01) G01N 27/16 (2006.01)
Patent
CA 1203022
ABSTRACT OF THE DISCLOSURE A method and a device for determining explosivity rate of a gaseous medium with a detecting filament which is heated in said medium by an electric current flowing therethrough. Said detecting filament is ignited through connection to a power supply and power supplied to said filament is regulated so as to maintain constant the resistance thereof. At some successive moments value of a quantity U significant for power supplied to said filament is taken into account. An expo- nential curve is extrapolated from such values; parameters thereof are identified and introduced in a process function adapted to deduce therefrom an estimation of the initial explosivity rate of said gaseous medium independently of the nature of the explosive gas(es) present therein.
442678
Boutonnat Maurice
Marget Christian
Charbonnages de France
Riches Mckenzie & Herbert Llp
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