Automotive Coalition for Traffic Safety, Inc.

Autoliv Development Ab

Sensair Alcohol Sensing Ab

Asahi Kasei Microdevices Corporation

Senseair Ab

Hok Instrument Ab

Bertil Hök

Lars Tenerz

Leif Smith

Hiromi Fujita

Tatsushi Yagi

Hans Martin

Raimo Gester

Håkan Pettersson

Mathias Granstam

Jonas Ljungblad

Henrik Rödjegård

Annika Kaisdotter Andersson

Martin Åhlenius

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.

Sensor system for passive in-vehicle breath alcohol estimation

The invention relates to a system for breath test of a person. It includes a sensor unit configured to sense the presence/concentration of a volatile substance, e.g. alcohol, present in air flowing through a predefined inlet area and generating a signal corresponding to the concentration of said substance. An analyzer determines the concentration of said substance in the breath of said person. It comprises means for the temporary interruption of said air flow at a point in time coinciding with the detection of a breath. It also relates to a method comprising interrupting the flow through said predefined area for a predetermined period of time, and detecting the concentration of said substance during said interruption.

Highly accurate breath test system

A system for authorization control and breath testing, comprising a management system unit and an authorization control and breath testing unit, wherein the authorization control and breath testing unit is configured to grant authorization to an individual seeking authorization without having access to any personal identification information about that individual.

System for authorization control and breath testing

A breath analyzer device () having an inlet region () and a sensor arrangement (), wherein the inlet region () is configured to receive a breath sample from a test subject and direct the sample to the sensor arrangement (), and the sensor arrangement is configured to provide a signal representative of the concentration of a volatile substance within the sample. The inlet region () includes a heater () arranged between: a sample inlet port () which is open to atmospheric air outside the device (); and a sample outlet port () which is open to the sensor arrangement (), the heater () extending at least part way along a tortuous flow channel () which extends between the inlet port () and the outlet port () for the direction of the sample to the sensor arrangement ().

Breath analyzer device

A system for the detection and analysis of at least one volatile substance in breath samples of a subject, including at least one source of infrared radiation adapted to the wavelength range of specific absorption peaks of said substances, a plurality of reflecting surfaces of said radiation adapted for collimation onto at least one detector providing a plurality of electrical output signals corresponding to the transmission of said radiation within wavelength intervals corresponding to said absorption peaks, at least one measuring cell including a mechanical support structure defining the position of said source, reflecting surfaces and detector, adapted to the reception and disposal of said breath sample, and exposing it to said radiation, at least one electronic signal processing unit with capacity to analyse said signals with respect to pre-programmed information concerning infrared absorption spectra of said substances. The response of the system being displayed or otherwise communicated, and perceived as essentially instantaneous.

Breath analyzer

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Västerås, Sweden

Bertil Hök