Abstract: The present description concerns a method of controlling a converter including two H bridges (110, 12) coupled by a transformer (130), wherein: two switching sequences between states are respectively applied to the two bridges; one of the states of a first one of the sequences corresponds to a given direction of application of a voltage to the transformer by the bridge having the first one of the sequences applied thereto; the first one of the sequences varies during a same halfwave of an AC voltage (V1) across one of the bridges (110), so that: during at least a first period, switchings into and out of said one of the states occur in a same state of a second one of the sequences; and during at least a second period, switchings into and out of said one of the states occur in different states of the second one of the sequences.

Abstract: A method for detecting an obstacle includes the steps of: calculating, for each point of a space around a telemeter, a plurality of corresponding intermediate probabilities of presence, each intermediate probability of presence being associated with a respective orientation of the telemeter among a plurality of predetermined orientations around a current orientation of the telemeter, each orientation being certain; for each point of space, calculating a probability of the presence of an obstacle from each corresponding intermediate probability of presence and from an uncertainty model on the orientation of the telemeter; and generating an alert if the probability of the presence of an obstacle in a predetermined zone with respect to the telemeter is greater than or equal to a predetermined alert threshold.

Abstract: A method, implemented by computer, for determining a level of a space-time trending physical quantity in the presence of physical obstacles in any zone, includes in a learning phase, determination, by means of machine learning receiving as input a first set of physical obstacles and a first set of data, of a model for the physical quantity in the predefined zone; in an operation phase, determination of a second level of the physical quantity in any zone, from the model for the physical quantity receiving as input a second set of physical obstacles, distinct from the first set of physical obstacles, and a second set of data.

Abstract: A method is provided for collaboratively detecting tangible bodies in an environment employing a plurality of distance sensors with which respective carriers are equipped, including: for each sensor, acquiring a series of measurements of distance of a closest tangible body along a line of sight; applying an inverse model of the sensor on a local occupancy grid; and constructing a consolidated local occupancy grid via Bayesian fusion of the occupancy probabilities thus determined; and, computing occupancy probabilities of the cells of a global occupancy grid via Bayesian fusion of the occupancy probabilities of corresponding cells of at least certain of said consolidated local occupancy grids. A system for implementing such a method is also provided.

Abstract: The present description concerns a method of controlling a converter including two H bridges (110, 12) coupled by a transformer (130), wherein: repetitions of two switching sequences between a plurality of states are respectively applied to the two bridges; and the two sequences are generated from a same value representative of an interval between switching times of the two sequences, said same value being selected according to whether a ratio between the respective voltages across the H bridges is greater or smaller than a transformation ratio (n) of the transformer.

Abstract: The present description concerns a method of controlling a converter (100) including two H bridges (110, 120) coupled by a transformer (130), wherein: repetitions of two switching sequences between a plurality of states are respectively applied to the two bridges; the switchings of the sequences occur at times resulting from calculations based on a desired equality between values of a current in the transformer at one of said times of one of the two sequences and at one of said times of the other one of the two sequences; and for each one of said calculations, a constant frequency, common to said repetitions and identical for the two bridges, is selected prior to the calculations.

Abstract: The present description concerns a method of controlling a converter including two H bridges (110, 12) coupled by a transformer (130), wherein: two switching sequences between states are respectively applied to the two bridges; one of the states of a first one of the sequences corresponds to a given direction of application of a voltage to the transformer by the bridge having the first one of the sequences applied thereto; the first one of the sequences varies during a same halfwave of an AC voltage (V1) across one of the bridges (110), so that: during at least a first period, switchings into and out of said one of the states occur in a same state of a second one of the sequences; and during at least a second period, switchings into and out of said one of the states occur in different states of the second one of the sequences.

Abstract: A method for determining information regarding the displacement of an object from measurements provided by an accelerometer associated with the object. The method comprises the steps of detecting acceleration peaks in the measurements, of calculating one or more characteristics of the acceleration peaks detected, and of determining a mode of travel of the object from the characteristics of the acceleration peaks. The measurements undergo non-uniform resampling upon the detection of local extrema.

Abstract: A method for initializing a sensor array comprises executing a statistical test on a set consisting of first measurements measured by the sensors of the array, the statistical test being able to detect in the first measurements at least one aberrant measurement caused by a presence of an object, called a disruptor, this disruptor modifying the measured physical quantity nonuniformly, wherein if the execution of the statistical test detects at least one aberrant measurement, then the method comprises signaling the presence of the disruptor, and if the execution of the statistical test does not detect at least one aberrant measurement, then the method comprises acquiring second measurements of the physical quantity, the second measurements being measured by the sensors.

Abstract: A method for detecting an obstacle includes the steps of: calculating, for each point of a space around a telemeter, a plurality of corresponding intermediate probabilities of presence, each intermediate probability of presence being associated with a respective orientation of the telemeter among a plurality of predetermined orientations around a current orientation of the telemeter, each orientation being certain; for each point of space, calculating a probability of the presence of an obstacle from each corresponding intermediate probability of presence and from an uncertainty model on the orientation of the telemeter; and generating an alert if the probability of the presence of an obstacle in a predetermined zone with respect to the telemeter is greater than or equal to a predetermined alert threshold.

Abstract: A method of calibrating a triaxial sensor such as a magnetometer. The method includes steps (DIS) to calculate a spatial distribution indicator of a set of measurements output by the sensor, and to determine (AJS), using a fitting method, parameters of a parametric surface that can be used to fit said surface to the set of measurements. The fitting method is selected from among several predetermined fitting methods as a function of the spatial distribution indicator. The predetermined fitting methods may include an ellipsoid fitting method, a sphere fitting method, a sphere fitting method and a two-step fitting method consisting of a first fitting to a sphere followed by a second fitting to an ellipsoid, the centre of which is coincident with the centre of the sphere of the first fitting.

Abstract: The invention relates to a computer-implemented method for detecting an anomaly of a rolling equipment rolling on rails of a railway resting on a rail support. This method comprises a decomposition (DECOMP) by discrete wavelet transform of a measurement signal (S) transmitted by a strain sensor detecting the deformation of the rail support into an approximation signal (AJ) and a residual signal (RJ) and a search (RECH-PA) for outliers (PA) in the residual signal (RJ) in order to detect an anomaly of the rolling equipment.

Abstract: A method of localising an access point (B1, B2, B3) to a communication network; The method comprises the following steps: reconstruction of a trajectory (P1, P2, P3, P4) followed by a mobile device during a displacement during which it makes measurements of an indicator related to the distance separating it from the access point; determination of a localisation (T1, T2, T3) at which each of the measurements on the trajectory is made; calculation for each measurement of a difference between the distance separating a possible localisation of the access point from the location at which the measurement is made and a distance estimated from the measurement and a propagation model relating the indicator and the distance, and calculation of a localisation error from the calculated differences. The propagation model is updated at each evaluation of a possible localisation of the access point.

Abstract: A method for initializing a sensor array comprises executing a statistical test on a set consisting of first measurements measured by the sensors of the array, the statistical test being able to detect in the first measurements at least one aberrant measurement caused by a presence of an object, called a disruptor, this disruptor modifying the measured physical quantity nonuniformly, wherein if the execution of the statistical test detects at least one aberrant measurement, then the method comprises signaling the presence of the disruptor, and if the execution of the statistical test does not detect at least one aberrant measurement, then the method comprises acquiring second measurements of the physical quantity, the second measurements being measured by the sensors.

Abstract: A method for determining information regarding the displacement of an object from measurements provided by an accelerometer associated with the object. The method comprises the steps of detecting acceleration peaks in the measurements, of calculating one or more characteristics of the acceleration peaks detected, and of determining a mode of travel of the object from the characteristics of the acceleration peaks. The measurements undergo non-uniform resampling upon the detection of local extrema.

Abstract: A method for estimating state-of-charge of a battery cell includes suppressing full execution of a capacitance-estimation algorithm for as long as a parameter does not exceed a certain threshold. The parameter is either a measured voltage value across the cell's terminals, the cell's estimated state-of-charge, or an amount of charge passing in or out of the cell during some interval. A battery-management system triggers full execution when the parameter falls below the threshold, or, if the parameter is the amount of charge passing, when it rises above the threshold.

Abstract: A method of calibrating a triaxial sensor such as a magnetometer. The method includes steps (DIS) to calculate a spatial distribution indicator of a set of measurements output by the sensor, and to determine (AJS), using a fitting method, parameters of a parametric surface that can be used to fit said surface to the set of measurements. The fitting method is selected from among several predetermined fitting methods as a function of the spatial distribution indicator. The predetermined fitting methods may include an ellipsoid fitting method, a sphere fitting method, a sphere fitting method and a two-step fitting method consisting of a first fitting to a sphere followed by a second fitting to an ellipsoid, the centre of which is coincident with the centre of the sphere of the first fitting.

Abstract: An estimation method for estimating a cell's state-of-charge includes obtaining a capacitance prediction for a cell based at least in part on a preceding capacitance thereof and correcting that prediction by acquiring measurements of a physical quantity that depends on a summation of currents passing through the cell. The correction is based at least in part on a difference between the measurement of the physical quantity and a prediction for that quantity.

Abstract: In a method for locating mobile devices, a trajectory (T1, T2) is reconstructed modelling a movement made by each mobile device during which the mobile device carries out measurements of an indicator linked to the distance separating it from access terminals (B1-B5) to a communication network. From these measurements, the locations of the terminals are calculated in a frame of reference linked to each mobile device. A procrustean analysis is then performed to determine, for each mobile device, a geometric transformation that transforms the locations of the terminals in the frame of reference linked to the mobile device into locations transformed in a common frame of reference. From this determination, the location of each terminal transformed in the common frame of reference is superimposed with a location of the terminal in the common frame of reference. Finally, the corresponding geometric transformation is applied to the trajectory of each mobile device.

Abstract: Automatically determining state-of-charge of a battery with cells includes, for each cell, scheduling refreshment times for the cell as a function of the cell's priority level, at times that correspond to refreshment times for the first cell, fully executing an estimation algorithm for the first cell, for at least a second cell of the set of cells, and at times other than those that correspond to refreshment times for the second cell, partially executing the estimation algorithm for the cell thereby obtaining an estimate of the second cell's state-of-charge, and determining a state-of-charge of the battery from states-of-charge estimated for each of the cells of the battery. The estimation algorithm estimates a cell's state-of-charge at a particular time as a function of a measured voltage and a measured current, both of which are obtained at the particular time.