Pseudo-continuous process for the interrogation in an...

Details Pseudo-continuous process for the interrogation in an... Pseudo-continuous process for the interrogation in an...

G - Physics

01

N

G01N 27/14 (2006.01) G01N 27/16 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2049330

To measure the content, in a gaseous medium, of a combustible gas whose nature is known, a resistance-type element either with a catalytic surface or which is sensitive to variations in concentration of said gas in said medium is heated electrically; the value of a quantity representative of the concentration of said gas is detected, and, according to a conversion law established beforehand by calibration, a measurement for said conversion is deduced. Said element is heated in a cyclic manner, in cycles consisting of a heating phase, a second phase during which the intensity (I) is adjusted to maintain the resistive element at a set temperature and the stabilised value of the voltage (U) at the terminals of said detector is measured, and a third phase during which the heating power is reduced. On average, the electric current flowing during the second phase is appreciably lower than the heating current.

Pour mesurer la teneur d'un milieu gazeux en un gaz combustible de nature connue, on chauffe électriquement, dans ce milieu, un élément résistif à surface catalytique, ou sensible aux variations de concentration de ce gaz dans ce milieu; on détecte la valeur d'une grandeur représentative de la concentration de ce gaz et on en déduit selon une loi de conversion obtenue préalablement par étalonnage, une mesure de cette conversion. Le chauffage de cet élément se fait de façon périodique, par cycles comportant une phase de chauffage, une seconde phase au cours de laquelle on régule l'intensité (I) en sorte de maintenir l'élément résistif à une température de consigne et on mesure la valeur stabilisée de la tension (U) aux bornes de ce détecteur, et une troisième phase au cours de laquelle on diminue la puissance de chauffage. En moyenne, la puissance du courant électrique circulant pendant cette deuxième phase est sensiblement inférieure à la puissance du courant de chauffage.

Affiliated with

Also associated with

Rating

Pseudo-continuous process for the interrogation in an... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pseudo-continuous process for the interrogation in an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pseudo-continuous process for the interrogation in an... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1833045