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

Claim 0:
1. A method for passive breath alcohol detection for vehicle operation, the method comprising:
initiating a sensor system;
passively obtaining a first air sample of air in a vehicle;
measuring a concentration of a tracer gas in the first air sample;
monitoring, using the sensor system, at least one testing condition affecting the ambient air inside the vehicle;
determining 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, measuring a Breath Alcohol Concentration (BrAC) from the first air sample;
if the at least one testing condition is outside of the predefined range, requesting and actively obtaining a second air sample from a driver of the vehicle and measuring the BrAC of the driver.