Motor vehicles – With means for promoting safety of vehicle – its occupant or... – Responsive to absence or inattention of operator – or...
Patent
1986-05-01
1989-03-07
Bertsch, Richard A.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
Responsive to absence or inattention of operator, or...
73 23, 128719, 340576, 422 84, B60Q 100, F08B 2300
Patent
active
048098108
ABSTRACT:
Disclosed is a system both apparatus and method, for analyzing a breath sample (22). A transducer (24) senses the pressure, temperature 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 compares the alcohol signal with the alcohol reference, and in response generates either a passing signal or a failing signal depending on whether or not the threshold level is exceeded.
REFERENCES:
patent: 3764270 (1973-10-01), Collier et al.
patent: 3780311 (1973-12-01), Brown
patent: 3809067 (1974-05-01), Hoppesch
patent: 3823601 (1974-07-01), Hoppesch
patent: 3831707 (1974-08-01), Takeuchi
patent: 4093945 (1978-06-01), Collier et al.
patent: 4592443 (1986-06-01), Simon
patent: 4613845 (1986-09-01), Du Bois
Elfman Brian P.
Zajac Patricia L.
Autosense Corporation
Bertsch Richard A.
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