# Christelle Godin, Brignoud FR

## Christelle Godin, Brignoud FR

Patent application number | Description | Published |
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20080270068 | Method for Estimating Movement of a Solid - The method estimates movement of a solid mobile in a medium capable of generating disturbances defined by a three-variable vector, wherein the movement is defined by a six-variable vector and the solid is equipped with at least one sensor sensitive to acceleration having at least three sensitive axes and at least one sensor sensitive to the magnetic field having at least three sensitive axes. The method for estimating the movement of a solid includes a step of calculating a nine-variable vector consisting of the six-variable movement vector and of the three-variable disturbance vector and a step of weighting the nine-variable vector capable of transforming the nine-variable vector into a vector with not more than five variables to be estimated. | 10-30-2008 |

20080281555 | METHOD AND DEVICE FOR DETECTING A SUBSTANTIALLY INVARIANT ROTATION AXIS - A method for detecting a substantially invariant rotation axis of a motion of a mobile body equipped with at least one inertial or magnetic sensor with three sensitive axes that includes acquiring physical measurements with respect to the three sensitive axes of the sensor, the physical measurements including at least three samples at different times, estimating a substantially invariant rotation axis in the physical measurements space, and identifying the estimated axis as the substantially invariant rotation axis of the motion. In one aspect, the method is applicable for estimating the motion of a mobile body rotating about a substantially invariant axis. | 11-13-2008 |

20090012921 | METHOD FOR IDENTIFYING A PERSON'S POSTURE - A classification method including first classifying an event of any kind by first rules, and then second classifying events, not identified by the first classification, by a learning base reinforced with all the events identified by the first classification. The method is adaptive if the second classification rules are amended according to new examples that were able to be determined by the first rules. | 01-08-2009 |

20090030345 | METHOD AND DEVICE FOR THE RECOGNITION OF THE POSITION OR MOVEMENT OF A DEVICE OR A PERSON - This method uses two sets of sensors to estimate certain characteristics of the movement of a device or a person or states, especially postures, they adopt. A first, abundant, set of sensors ( | 01-29-2009 |

20110173831 | AUTONOMOUS SYSTEM AND METHOD FOR DETERMINING INFORMATION REPRESENTATIVE OF THE MOVEMENT OF AN ARTICULATED CHAIN - The invention relates to an autonomous system for determining items of information representative of the movement of an articulated chain (CA | 07-21-2011 |

20110264400 | DEVICE AND METHOD FOR DETERMINING A CHARACTERISTIC OF A PATH FORMED BY CONSECUTIVE POSITIONS OF A TRIAXIAL ACCELEROMETER RIGIDLY CONNECTED TO A MOBILE ELEMENT - Device for determining a characteristic of a trajectory formed of successive positions of a triaxial accelerometer ( | 10-27-2011 |

20120016624 | DEVICE AND METHOD FOR CHARACTERIZING MOVEMENTS - The invention proposes a device and a method for characterizing movements performed by an object, notably a limb of a human being instrumented with at least one accelerometer. The invention is particularly useful for determining the direction, the line and the length of the steps of said human being. The invention uses algorithms for processing the signals from the sensor to make it possible to segment the steps by identifying the lifting and the landing of said limb by comparing the signals output from the sensor with thresholds, to determine the direction and the line of the step by comparing the maxima of the values of the signals along two axes substantially parallel to the walking plane and to calculate the length of the step by double integration of the signals according to the direction of the step. The invention is also applicable to hand movements that have trend characteristics similar to those of the steps. | 01-19-2012 |

20120109541 | TACTILE SURFACE TEXTURE CHARACTERISATION METHOD - A tactile surface texture method including: measuring at least one force perceived by a force sensor during a relative movement of the sensor with respect to a surface to be characterized; calculating one or more time and/or frequency parameters of an output signal transmitted by the sensor representative of the previously measured force; determining a value of a tactile descriptor of multiple tactile descriptors through application of a continuous transfer function to the previously calculated parameters, the transfer function being previously determined by regression from a learning database associating, for each descriptor, plural values of the tactile descriptor with plural values of one or more time and/or frequency parameters calculated from measurements made by the force sensor on multiple test surfaces representative of values of the tactile descriptor in question. | 05-03-2012 |

20120283856 | SYSTEM AND METHOD FOR COUNTING THE CHANGES IN DIRECTION OF A PERSON - 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. | 11-08-2012 |

20120323521 | SYSTEM AND METHOD FOR RECOGNIZING GESTURES - 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. | 12-20-2012 |

20130312502 | METHOD FOR ESTIMATING A ROUGHNESS OF A SURFACE - A method for estimating a roughness R of a surface, including the following steps: | 11-28-2013 |

20130324890 | METHOD AND SYSTEM FOR DETERMINING THE VALUES OF PARAMETERS REPRESENTATIVE OF A MOVEMENT OF AT LEAST TWO LIMBS OF AN ENTITY REPRESENTED IN THE FORM OF AN ARTICULATED LINE - A method determining values of parameters representing a movement of an entity represented by an articulated chain, by a sensor assembly including at least one sensor for a parameter representing an orientation of a first segment of the articulated chain, the method including: reception of an orientation value measured and supplied by the orientation sensor; estimation of a value of at least one first parameter representing a movement of the first segment by processing the orientation value; and, based on a predetermined movement model of the articulated chain, as a time change model, including at least one relationship of time dependency between the at least one first parameter and at least one other parameter representing a movement of another segment of the articulated chain: estimation of a value of the at least one other parameter by application of the time change model to the estimated value of the at least one first parameter. | 12-05-2013 |

20130338961 | METHOD AND SYSTEM FOR ESTIMATING A PATH OF A MOBILE ELEMENT OR BODY - A method for estimating a path of a moving element or body using a sensor assembly includes: receiving acceleration values provided by an accelerometer; receiving angular velocity values provided by a gyrometer; processing the values provided for estimating at least one angular position value using the angular velocity values and at least two Cartesian position values defining a path of the moving element or body using acceleration values and the at least one previously estimated angular position value; estimating rotation parameters, by inverting a rotational realignment model of the estimated path subject to prior knowledge of the path; retroactively correcting the at least one estimated angular position value, by applying a rotation on this value using estimated rotation parameters, so as to provide at least one corrected angular position value. | 12-19-2013 |

20150057971 | METHOD OF IDENTIFYING GEOMETRIC PARAMETERS OF AN ARTICULATED STRUCTURE AND OF A SET OF REFERENCE FRAMES OF INTEREST DISPOSED ON SAID STRUCTURE - Parameters characterizing the orientation and the position of each sensor, including at least one accelerometer, are evaluated in the reference frame of each segment, together with the length of each segment, by using predetermined configurations and motions of a structure to which the sensors are attached. This makes it possible to provide a device for capturing the motions of a body with measurements which enables greater reliability of the measurements. | 02-26-2015 |