Breath monitoring apparatus

G - Physics – 01 – N

Patent

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Details

IPC codes

G01N 1/22 (2006.01) G01N 33/497 (2006.01)

Type

Patent

Patent number

CA 2269546

Description

An apparatus for measuring the concentration of a human breath constituent, such as alcohol, comprises a hand-held housing (12) having an internal breath passageway with a first end (14) through a nozzle (16) mounted to the housing. A waveguide-type integrating circuit sensor (18) for detecting the constituent is mounted in said chamber and provides an output signal corresponding to the presence of the constituent to be sensed. A pressure transducer (22) is coupled to the passageway for measuring the pressure therein to allow the validity of the breath sample to be determined.

L'invention a pour objet un appareil servant à mesurer la concentration d'un composant, tel que l'alcool, dans l'air expiré par une personne. Ledit appareil comprend un logement (12) portatif, qui contient un passage intérieur, où parvient l'air expiré, et une première extrémité (14) pratiquée dans une buse (16), laquelle est montée sur ledit logement. Un capteur (18) à circuit intégré de type à guide d'ondes, qui sert à détecter le composant, est monté sur ledit logement et fournit un signal de sortie indiquant la présence du composant visé. Un transducteur (22) de pression est couplé au passage pour en mesurer la pression afin que la valeur de l'échantillon de l'air expiré puisse être déterminée.

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