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: A method and a device for determining a concentration of a component in a fluid is described. The method comprises the steps of providing from a first optical sensor (1) a first light intensity (IR1A) for light which has interacted with the fluid at a first point in time (A), and a second light intensity (IR1B) for light which has interacted with the fluid at a second point in time (B), wherein the first light intensity (IR1A) is different from the second light intensity (IR1B), and providing from a second optical sensor (2) a third light intensity (IR2A) for light which has interacted with the fluid at the first point in time (A), and a fourth light intensity (IR2B) for light which has interacted with the fluid at the second point in time (B).

Abstract: A method and a device for determining a concentration of a component in a fluid is described. The method comprises the steps of providing from a first optical sensor (1) a first light intensity (IR1A) for light which has interacted with the fluid at a first point in time (A), and a second light intensity (IR1B) for light which has interacted with the fluid at a second point in time (B), wherein the first light intensity (IR1A) is different from the second light intensity (IR1B), and providing from a second optical sensor (2) a third light intensity (IR2A) for light which has interacted with the fluid at the first point in time (A), and a fourth light intensity (IR2B) for light which has interacted with the fluid at the second point in time (B).

Abstract: A method for determining a measure of a gas concentration from a group of at least two non- dispersive infrared, NDIR, gas sensors (S1-SN) is described. The method comprises the steps of obtaining, at a processing unit (1), from each NDIR gas sensor (S1-SN) a measure of a gas concentration as a belief function Pi(x), which provides a probability as a function of the sensed light intensity at a specific wavelength, merging, in the processing unit, the belief functions Pi(x) to a merged belief function P(x). A computer program performing the method is also described.

Abstract: A multi-channel gas sensor comprising a gas cell (101, 601), a light source (110, 210, 310, 410, 510, 610), a first interference filter (150, 250, 350, 450, 550, 650), a first detection unit (120, 220, 320, 420, 520, 620) and a second detection unit (130, 230, 330, 430, 530, 630). The light source (110, 210, 310, 410, 510, 610) is arranged to emit light radiation into the gas cell (101, 5 601). The first detection unit (120, 220, 320, 420, 520, 620) is arranged to detect light from the light source, that has propagated through at least a part of the gas cell (101, 601), and that has been transmitted through the first interference filter (150, 250, 350, 450, 550, 650).

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: A multi-channel gas sensor comprising a gas cell (101, 601), a light source (110, 210, 310, 410, 510, 610), a first interference filter (150, 250, 350, 450, 550, 650), a first detection unit (120, 220, 320, 420, 520, 620) and a second detection unit (130, 230, 330, 430, 530, 630). The light source (110, 210, 310, 410, 510, 610) is arranged to emit light radiation into the gas cell (101, 5 601). The first detection unit (120, 220, 320, 420, 520, 620) is arranged to detect light from the light source, that has propagated through at least a part of the gas cell (101, 601), and that has been transmitted through the first interference filter (150, 250, 350, 450, 550, 650).

Abstract: Systems, apparatus and methods determine the presence of a volatile substance in expired breath. Alcohol concentrations can be determined from expired breath through the use of electromagnetic detection. The systems, apparatus and methods allow measurements of volatile substances to be done accurately and quickly over a wide range of temperatures, and are easily incorporated into vehicles.

Abstract: Systems, apparatus and methods determine the presence of a volatile substance in expired breath. Alcohol concentrations can be determined from expired breath through the use of electromagnetic detection. The systems, apparatus and methods allow measurements of volatile substances to be done accurately and quickly over a wide range of temperatures, and are easily incorporated into vehicles.

Abstract: The invention relates to a method of producing a movable lens structure that comprises the steps of: forming a lens from a lens material disposed on a carrier of another material (step 58), and forming a micromechanical structure from the carrier (step 60), wherein the forming of the lens takes place before the forming of the micromechanical structure. With this method a simplified production method is obtained that simplifies difficult compatibility requirements between micromechanics and lens that can otherwise be hard to meet.