Method and device for determination of explosivity rate of...

Details Method and device for determination of explosivity rate of... Method and device for determination of explosivity rate of...

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.

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