G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/00 (2006.01) G01N 29/02 (2006.01)
Patent
CA 2689711
In an ultrasonic apparatus for measuring the concentration of gas provided with two ultrasonic oscillators for transmitting/receiving an ultrasonic wave, arranged opposite to each other in piping through which a sample gas flows, a temperature sensor, and a pressure sensor, an ultrasonic method and apparatus that can accurately measure gas concentration regardless of pressure of the sample gas are provided as an ultrasonic apparatus for measuring the concentration of gas comprising concentration calculating means for calculating sample gas concentration based on a propagation speed correction coefficient by pressure.
La présente invention a pour objet un dispositif ultrasonique de mesure de la concentration d'un gaz qui est composé de deux vibrateurs ultrasoniques qui transmettent et reçoivent des ondes ultrasoniques, un détecteur de la température et un détecteur de la pression qui sont arrangés pour s'opposer l'un à l'autre dans un tuyau où un échantillon du gaz circule. Le dispositif renferme en outre un dispositif de calcul de la concentration pour calculer la concentration d'un échantillon de gaz selon un coefficient de correction de la vitesse de propagation basé sur une pression. Ainsi il est possible de procurer un procédé et un dispositif permettant de mesurer exactement la concentration d'un gaz sans tenir compte de la pression de l'échantillon de gaz.
Borden Ladner Gervais Llp
Teijin Pharma Limited
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