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 invention relates to a breath test system that is unobtrusive in that it does not require a person subjected to the system to take any other action to breath. It comprises a sensor unit (5) configured to sense the presence or concentration of a volatile substance, present in air flowing through a predefined inlet area (4), and to generate a signal corresponding to the concentration of said substance. There is also provided an apparatus (2, 3) configured to detect the presence of a person at a position in the vicinity of said input area, and having means for registering said presence, and further configured to respond to said presence by delivering an output. This said apparatus includes a unit configured to call for immediate attention of said person, upon said registration of the presence of said person, and a unit configured to provide instructions to said person to direct an expiratory air flow towards said inlet area (4).

Abstract: 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.

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: 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 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.

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 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.

Abstract: 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.

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: 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.

Abstract: A breath analyzer device (1) having an inlet region (2) and a sensor arrangement (3), wherein the inlet region (2) is configured to receive a breath sample from a test subject and direct the sample to the sensor arrangement (3), and the sensor arrangement is configured to provide a signal representative of the concentration of a volatile substance within the sample. The inlet region (2) includes a heater (20, 24) arranged between: a sample inlet port (6) which is open to atmospheric air outside the device (1); and a sample outlet port (11) which is open to the sensor arrangement (3), the heater (20, 24) extending at least part way along a tortuous flow channel (18) which extends between the inlet port (6) and the outlet port (11) for the direction of the sample to the sensor arrangement (3).

Abstract: A breath analyser device (1) having an inlet region (2) and a sensor arrangement (3), wherein the inlet region (2) is configured to receive a breath sample from a test subject and direct the sample to the sensor arrangement (3), and the sensor arrangement is configured to provide a signal representative of the concentration of a volatile substance within the sample. The inlet region (2) includes a heater (20, 24) arranged between: a sample inlet port (6) which is open to atmospheric air outside the device (1); and a sample outlet port (11) which is open to the sensor arrangement (3), the heater (20, 24) extending at least part way along a tortuous flow channel (18) which extends between the inlet port (6) and the outlet port (11) for the direction of the sample to the sensor arrangement (3).

Abstract: 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.

Abstract: The invention relates to method and apparatus for the determination of alcohol concentration of expired air. By visualising current or accumulated measuring value and error in real time during ongoing measurement, interactive control of alcohol determination is enabled with respect to accuracy and time lapse. Preferably the measurement is performed without contact with compensation for the dilution of the breath sample, which is performed by simultaneous measurement of temperature, concentration of water vapour or carbon dioxide. The method is divided into a stepwise procedure based on the dependence of the measuring error on the dilution of the expired air, and accumulated time, both being possible to influence by the test person or operator. Special advantages are being obtained at measurements relative to a concentration limit. The alcohol determination is preferably performed by means of absorption spectroscopy within the infrared wavelength range.

Abstract: A sensor for the measurement of carbon dioxide concentration within an air flow being input to a measuring cell (1) connected to at least one electroacoustic element (2, 3) for transmitting and receiving airborne acoustic waves within the measuring cell (1). The output signal of the sensor corresponds to the propagation velocity of these waves and an indirect measure of carbon dioxide concentration, with an automatic offset correction functionality for compensation of undesired offset variations of the signal, caused by temperature or humidity variations. Preferably, an accumulating function for minimizing the influence of the offset variations is included, which for humidity variations may consist of a material with high porosity and surface density of polar molecular groups. Temperature control of the inner sheath (4) is effected by a temperature sensor (11), a resistive heating element (12) in good thermal contact with the inner sheath (4), and a control circuit (13).

Abstract: A method and a device for measuring a physiological variable in a living body, whereby a transmitter (1) is disposed outside of the body to transmit radio frequent energy, and a receiver (3) of radio frequent energy is disposed outside of the body. A transponder unit (2), having a sensor (11) sensitive to the physical variable, and a modulator unit (12) for controlling the radio frequent energy absorption of the transponder unit according to a time-sequence representing said physical variable, is introduced into the body. The transmitter sends radio frequent energy of substantially constant frequency and amplitude onto the transponder, and the receiver monitors the radio energy absorption of the transponder unit to determine the time-sequence representing said physical variable. The time-sequence is decoded to interpret it as a measure of the physical variable.