Abstract: A method for characterizing compounds of interest, introduced into a measuring chamber of an electronic nose, includes injecting a first gas sample formed from a carrier gas without the compounds of interest forming a second gas sample from the carrier gas with the compounds of interest; determining a measurement signal (Sk(ti)); measuring values ?1, ?2 of the relative humidity; determining corrective parameter ({tilde over (S)}kref|?2; ?Skref|??); and determining a useful signal (Suk(ti?P2)) by correcting the measurement signal associated with the second gas sample using the determined corrective parameter, and characterizing the compounds of interest based on the useful signal.

Abstract: A sensor is configured to input a fluid sample and to output a corresponding signature obtained from an electric signal characterizing the fluid sample, and includes at least one reactive site; at least one transducer configured to measure at least one physical property change induced by an interaction of the fluid sample with the at least one reactive site and to produce the electric signal. It is further certified to have passed a qualification test including computing a metrics and checking that the metrics matches at least one predefined qualifying criterion, wherein the metrics includes, for a plurality of reference fluid samples, a clustering quality score of respective signatures of the plurality of reference fluid samples.

Abstract: A method for recalibrating an electronic nose includes successively injecting, into a measurement chamber, reference gases that do not contain target compounds and that have various values of relative humidity. A measurement signal is determined in the course of each injection. Then, for each reference gas, a baseline is determined, which baseline is representative of the determined measurement signal. The baseline is also associated with the relative humidity of the reference gas present. A second correction function is determined on the basis of the determined baselines and of the predetermined values of relative humidity. The second correction function is then stored in a processing uni instead of a first correction function.

Abstract: A device includes capture sites; an imaging system for imaging the capture sites; a memory that stores a map of the capture sites including capture site shapes having respective predefined positions in the map and to be placed on an image of the capture sites, at a predefined position and in a predefined orientation so that the capture site shapes respectively indicate the areas of the image occupied by the capture sites; and a module for detecting an odor from an image of the capture sites and the map. The device includes an update module for obtaining an image of the capture sites, for determining, in the image, real areas respectively occupied by the capture sites, for determining, on the basis of the real areas, a correction of the position and/or of the orientation of the overlay of the map; and for updating the position and/or orientation of the overlay.

Abstract: An odor identification device includes capture sites designed to capture odorous volatile organic compounds present in an ambient air; an imaging system for imaging the capture sites designed to provide at least one raw image of the capture sites. The device further includes an unblurring module designed to implement an unblurring filter using an estimate of a spatial impulse response of the imaging system, on an image to be unblurred that originates from at least one raw image of the capture sites; and a module for identifying an odor from at least one image of the capture sites unblurred by the unblurring module.

Abstract: Disclosed is a method for characterizing target compounds using an analyzing system comprising a measurement chamber intended to receive the target compounds contained in a fluid sample and in which a plurality of separate sensitive sites each comprise receivers able to interact with the target compounds. The method includes supplying a fluid sample, determining a measurement signal Sk(ti) representative of the interactions between the target compounds and the receivers; computing a normed vector Sn(ti); and reiterating the determining and computing steps, while incrementing the measurement time, until a stability criterion is met, so as to obtain a characterization of the target compounds from the normed vector Sn(ti).

Abstract: The invention relates to a method for analyzing gas by an optical method, according to which a gas sample, comprising gaseous species for which it is desired to determine the quantity, is subjected to an illuminating radiation generated by a light source. The method comprises detecting a radiation having crossed the gas, by means of a light sensor. According to the invention, the light source produces different successive illuminations, such that at each illumination, the spectrum of the illuminating radiation varies. During each illumination, the intensity of the radiation detected by the light sensor is recorded. A processor can estimate a quantity of each gaseous species as a function of the respective intensities measured during each illumination. The invention also relates to a gas analysis device implementing the method.

Abstract: The invention relates to a method for analyzing gas by an optical method, according to which a gas sample, comprising gaseous species for which it is desired to determine the quantity, is subjected to an illuminating radiation generated by a light source. The method comprises detecting a radiation having crossed the gas, by means of a light sensor. According to the invention, the light source produces different successive illuminations, such that at each illumination, the spectrum of the illuminating radiation varies. During each illumination, the intensity of the radiation detected by the light sensor is recorded. A processor can estimate a quantity of each gaseous species as a function of the respective intensities measured during each illumination. The invention also relates to a gas analysis device implementing the method.

Abstract: A process for detecting activity of a person, in which movements of the person are measured by at least one sensor attached to the person, and respective components of the movements due to external activity and due to physiological activity are separated. The process obtains a signal of the sensor, filters the signal to derive a filtered signal, the filtering including partitioning the signal of the center into a low frequency component and high frequency component, and subtracts the filtered signal from the signal of the sensor. The filtering further variably extracts portions of the high frequency component according to a criterion of either a minimal level or a minimal instability of the signal of the sensor, and the filtered signal includes the low frequency component and the extracted portions of the high frequency components.

Abstract: A device for analyzing the movement of at least one moving element (EM), provided, for at least one moving element, with first means (DET1) for determining the orientation of a moving coordinate frame (Rm) connected in motion to the moving element (EM), with respect to a reference coordinate frame (Rr), including second means (DET2) for determining at least one locus of points (Tx, Ty, Tz) of at least one surface from at least one respective direction of an oriented axis (x, y, z) of the moving coordinate frame (Rm) connected in motion to the moving element (EM) and said surface.

Abstract: A device for analyzing the movement of at least one moving element (EM), provided, for at least one moving element, with first means (DET1) for determining the orientation of a moving coordinate frame (Rm) connected in motion to the moving element (EM), with respect to a reference coordinate frame (Rr), including second means (DET2) for determining at least one locus of points (Tx, Ty, Tz) of at least one surface from at least one respective direction of an oriented axis (x, y, z) of the moving coordinate frame (Rm) connected in motion to the moving element (EM) and said surface

Abstract: A system for inputting graphical elements Includes a substantially pen-shaped peripheral device (PD); means (DIG) for digitizing graphical elements produced by a first end (END1) of the peripheral device (PD); and display means (DISP) suitable for displaying the said graphical elements produced. The system also includes means (MSR) for measuring signals representative of the movement executed by the peripheral device (PD), which includes a gyrometer (G) with at least two measurement axes providing angular speeds according to the said axes, linked in a fixed manner to the said peripheral device (PD). Means (POS) for positioning, on the display means (DISP), a pointing element (PT), based on the said angular speeds, is also provided, together with means (ACT) for activating/deactivating the positioning means (POS).

Abstract: The invention discloses a method, a device and a system to build and/or use models for estimating behaviours of, or situations of interest to users. Said users have a device which is configured to capture at least a first dataset of sensor data in relation to the behaviour or situation. A set of processing capabilities is configured to capture first datasets comprising sensor data and second datasets comprising annotated data in relation to the behaviour or situation and to further configure at least a model. The device is further configured to adjust parameters of the at least a model to the characteristics of the user or of a group of users. The invention allows for an improvement over the prior art by allowing collection of a vast amount of data that will optimize the fit of the models to the behaviour or situation.

Abstract: The invention applies to a pointing device of a mobile element, for example a cursor, on a plane surface. The pointing device comprises a first sensor for measuring the angular rates of the device and a second sensor of the linear accelerations along three dimensions of said device. Preferably, the first sensor is a two-axis or three-axis gyrometer and the second sensor is a three-axis accelerometer. The invention makes it possible to render the movements of the mobile element in the surface of the orientation in which the pointing device is held by its user. This result is achieved by global resolution of the angles of torsion by combining the measurements of the first and second sensors either within an extended Kalman filter or by application of an optimization criterion.

Abstract: A system for counting a basic displacement of a person includes a housing (BT) and a fixing device (EF) for securely mounting the housing (BT) on the person. Within the housing are a magnetometer for measuring the direction of the terrestrial magnetic field in the reference frame of the housing, a device for determining a quantity representative of the inclination of the measured magnetic field with respect to the vertical, and a device for detecting a change of orientation of an orthogonal projection of the direction of the terrestrial magnetic field in a horizontal planar reference frame having axes of constant directions and tied in translation to the person, on the basis of the measured direction of the magnetic field and of the quantity representative of the inclination of the magnetic field with respect to the vertical.

Abstract: The device for detecting percussion events (DISP) comprises at least one axial accelerometer sensor (ACC1, ACC2, ACC3), characterized in that it also comprises at least one additional axial sensor insensitive to the translational vibrations (MAGN1, MAGN2), for measuring an information item representative of the orientation of the device (DISP) relative to a vector field of known direction within a fixed coordinate system not linked to the device (DISP), and low cut-off filtering means (FILTCB) provided with at least one input receiving measurements transmitted by the axial sensor or sensors (ACC1, ACC2, ACC3, MAGN1, MAGN2), means (AN) of analyzing the measurements filtered by said low cut-off filtering means (FILTCB), comprising comparison means (COMP) for comparing data from the analysis means (AN) with one or two thresholds (SP, SN).

Abstract: The invention relates to an autonomous system for determining items of information representative of the movement of an articulated chain (CA—1, CA—2, CA—3) comprising at least two solid elements (ES1—1, ES2—1, ES1—2, ES2—2, ES3—2, ES1—3, ES2—3, ES3—3, ES4—3) and at least one articulation (ART1—1, ART1—2, ART2—2, ART1—3, ART2—3, ART3—3) connecting said two elements. The system comprises at least two devices (DISP1—1, DISP2—1, DISP1—2, DISP2—2, DISP3—2, DISP1—3, DISP2—3, DISP3—3, DISP4—3) for measuring inter-device distances, mounted fixedly on two distinct elements of said articulated chain and suitable for transmitting the measurements made.

Abstract: An improved air pointing device which is capable of compensating for the roll angle imparted to said device by a user of said device. The device of the invention includes at least two gyrometers and two accelerometers, the latter being each used for different roll angles. The correction of the roll angle is effected by using the measurements of the first accelerometer, the output of the second accelerometer being simulated as an approximated function of the measurements of the first accelerometer, using a polynomial approximation of the relation between the output of the two accelerometers, the order of the polynomial being chosen as a function of the computing power which is available and the precision which is needed. In an embodiment of the invention, the first and second accelerometers are advantageously swapped at a value of the roll angle which is substantially equal to 45°.

Abstract: A system and method for estimating the orientation of an object in space at the instant k using measurements of the total acceleration (yA), of magnetic field (yM) and of the speed of rotation (yG) of said object in relation to three space axes, comprising a step of preprocessing said measurements (yA, yM, yG) at an instant k so as to detect the existence of a disturbance in said measurements and to compute corrected measurements at the instant k and a step of estimating the orientation ({circumflex over (q)}k) at the instant k by an observer on the basis of the corrected measurements ({tilde over (y)}A,k, {tilde over (y)}M,k, {tilde over (y)}G,k) at the instant k obtained from the preprocessing step. The estimation step advantageously uses matrices for transforming the frame of the object into a fixed frame which are applied, in case of disturbance, to a quaternion deduced from the integration of a measurement of speed of rotation composed with a quaternion of orientation computed at the instant k?1.

Abstract: Systems and methods for recognizing the gestures of an entity, notably a human being, and, optionally, for controlling an electrical or electronic system or apparatus, are discussed. The system uses sensors that measure signals, preferentially representative of inertial data about the movements of said entity, and implements a process for enriching a dictionary of said gestures to be recognized and a recognition algorithm, for recognition among the classes of gestures in said dictionary. The algorithm implemented is preferably of the dynamic time warping type. The system carries out preprocessing operations, such as the elimination of signals captured during periods of inactivity of the entity, subsampling of the signals, and normalization of the measurements by reduction, and preferentially uses, to classify the gestures, specific distance calculation modes and modes for merging or voting between the various measurements by the sensors.