Patent ID: 11964558
Assignee: AUTOMOTIVE COALITION FOR TRAFFIC SAFETY, INC.
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 14:
15. An apparatus for passive breath alcohol detection for vehicle operation, the apparatus comprising:
sensors configured to measure a concentration of a tracer gas in a passively obtained first air sample of air in a vehicle; and
a processor configured to:
monitor at least one testing condition affecting the ambient air inside the vehicle;
determine if the at least one testing condition is within a predefined range;
if the at least one testing condition is within the predefined range and a peak in tracer gas concentration is detected, measure a Breath Alcohol Concentration (BrAC) from the first air sample;
if the at least one testing condition is outside of the predefined range, request and actively obtain a second air sample from a driver of the vehicle and measure the BrAC of the driver.