G - Physics – 01 – N
Patent
G - Physics
01
N
150/12
G01N 33/98 (2006.01) B60K 28/06 (2006.01) B60R 25/04 (2006.01) G01N 33/497 (2006.01) G01N 33/00 (2006.01)
Patent
CA 1288321
BREATH ALCOHOL ANALYZER ABSTRACT Disclosed is a system, both apparatus and method, for analyzing a breath sample (22). A transducer (24) senses the pressure, tempera- ture and humidity of the breath sample and in response generates a breath signature signal (26). A sensor (28) detects the alcohol content of the breath sample and in response generates an alcohol signal (30). Also included is a breath reference (32), and an alcohol reference (34) which includes an alcohol threshold level (36). A first comparator (38) compares the breath signature signal with the breath reference, and in response generates either a valid signal (40) if the signals substantially match or an invalid signal (44) if the signals do not substantially match. A second comparator (46) compares the alcohol signal (30) with the alcohol reference (34), and in response generates either a passing signal (+) or a failing signal (-) depending on whether or not the threshold level (38) is exceeded. In this Abstract, the parenthetical reference numerals are included only to facilitate rapid understanding, and not to define or scope the invention defined by the Claims.
527518
Elfman Brian P.
Zajac Patricia L.
Autosense Corporation
Riches Mckenzie & Herbert Llp
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