Abstract: Methods and apparatus allow for passive determination of a driver's Breath Alcohol Concentration (BrAC). Alcohol concentrations can be determined from exhaled breath, however inconvenience to a driver is often a barrier for incorporation of BrAC sensors into vehicles. The methods and apparatus allow for passive determination of a driver's BrAC, while detecting and accounting for a wide range of environmental conditions that may reduce the accuracy of a passive BrAC reading.

Abstract: The present invention relates to a system and method for monitoring and controlling air quality in a vehicle compartment. In particular the invention relates to a sensor unit determining at least two different substances present in the air of the vehicle compartment wherein the settings of a heat, ventilation and air conditioning system (HVAC-system) of the vehicle are controlled and optimized using at least one of the determined substances.

Abstract: The present invention relates to a breath analyzing system and method. In particular the invention relates to a breath analyzing system and method arranged to provide tracer-aided determination and classification of the presence of a breath intoxicating substance facilitated by a user interaction scheme. If a determination may not be performed within a first compliant mode of operation an interactive mode is initiated wherein the user is stepwise instructed to perform actions that facilitate the classification. An action compliance value, representing how well the user follows issued actions/instructions, is determined and used to select actions.

Abstract: The present invention relates to a breath analyzing system and method. In particular the invention relates to a breath analyzing system and method arranged to provide tracer-aided classification of the presence of a breath intoxicating substance above a limit concentration and providing status to a user about the progression of the classification. The method/system detects a peak in the tracer signal and defines an evaluation period corresponding to the duration of the peak. Measurements classification of the concentration of the intoxicating substance is used for the evaluation period, and if required to achieve a result, for a plurality of evaluation periods.

Abstract: The present invention relates to a breath analyzing apparatus and method. In particular the invention relates to a breath analyzing apparatus operating in the 3.3-3.6 ?m wavelength range and arranged to provide absorption information in at least two different wavelength bands in the wavelength range. The absorption information from the wavelength bands are compared with tabulated data of preselected substances to identify an unidentified substance.

Abstract: The present invention relates to a breath analyzing system and method. In particular the invention relates to a breath analyzing system combined with a heat, ventilation and air conditioning system (HVAC-system) of the vehicle, wherein the settings of the HVAC system are controlled to optimize the performance of the breath analyzing system. In particular the HVAC system may be set to a closed position facilitating a concentration build up of breath gases in the compartment. Alternatively the HVAC system may shift between open and closed positions.

Abstract: Methods and apparatus allow for passive determination of a driver's Breath Alcohol Concentration (BrAC). Alcohol concentrations can be determined from exhaled breath, however inconvenience to a driver is often a barrier for incorporation of BrAC sensors into vehicles. The methods and apparatus allow for passive determination of a driver's BrAC, while detecting and accounting for a wide range of environmental conditions that may reduce the accuracy of a passive BrAC reading.

Abstract: Methods and apparatus allow for passive determination of a driver's Breath Alcohol Concentration (BrAC). Alcohol concentrations can be determined from exhaled breath, however inconvenience to a driver is often a barrier for incorporation of BrAC sensors into vehicles. The methods and apparatus allow for passive determination of a driver's BrAC, while detecting and accounting for a wide range of environmental conditions that may reduce the accuracy of a passive BrAC reading.

Abstract: Methods and apparatus allow for passive determination of a driver's Breath Alcohol Concentration (BrAC). Alcohol concentrations can be determined from exhaled breath, however inconvenience to a driver is often a barrier for incorporation of BrAC sensors into vehicles. The methods and apparatus allow for passive determination of a driver's BrAC, while detecting and accounting for a wide range of environmental conditions that may reduce the accuracy of a passive BrAC reading.