Motor vehicles – With means for promoting safety of vehicle – its occupant or... – Responsive to absence or inattention of operator – or...
Patent
1986-01-16
1987-07-07
Bertsch, Richard A.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
Responsive to absence or inattention of operator, or...
340 52R, B60R 100, G08B 2300
Patent
active
046780572
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. In this Abstract, the parethetical reference numerals are included only to facilitate rapid understanding, and not to define or scope the Invention defined by the Claims.
REFERENCES:
patent: 3855573 (1974-12-01), Honda et al.
patent: 4117467 (1978-09-01), San
patent: 4507644 (1985-03-01), Abrahamson
patent: 4565997 (1986-01-01), Seko et al.
patent: 4613845 (1986-09-01), Du Bois
Elfman Brian P.
Zajac Patricia L.
Autosense Corporation
Bertsch Richard A.
Howard William H. F.
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