Calibrating breathalyzer

摘要

The calibrating breathalyzer comprises an alcohol sensor, a non-volatile memory, a processing unit or processor, a display and a housing to house these components. The processing unit can calibrate the breathalyzer using the user's body as a simulator based on the user's metabolism rate, type and amount of alcohol consumed by the user. The processing unit determines a sample time to receive a breath sample from the user based on a time to a predetermined calibration point from the drinking start time calculated using the user's metabolism rate and the determined maximum alcohol level. The BAC % measurement based on the user's breath sample at the sample time is used as a reference point in calibrating the breathalyzer.

主权项

1. A calibrating breathalyzer, comprising:
an alcohol sensor to receive a breath air sample and to measure percent blood alcohol concentration (BAC %) based on analysis of the breath sample; a non-volatile memory to store calibration data of the alcohol sensor comprising one or more reference points; a processing unit to operate the breathalyzer in two modes: (A) a calibration mode to calibrate the breathalyzer using a user's body as a simulator by receiving a BAC % measurement from the alcohol sensor based on the breath sample provided by a user at a sample time to provide a reference point, the sample time determined based on a time to a predetermined calibration point from a drink start time; and storing the reference point; and (B) an operation mode to provide a BAC % reading based on the BAC % measurement by the alcohol sensor and the calibration data stored in the non-volatile memory; a display to display the BAC % reading and other information to a user; and a housing to house the processing unit, the alcohol sensor, the non-volatile memory and the display.