Abstract: A sensor may be automatically calibrated during manufacture by providing a sensor processing unit having an integrated sensor, performing a check to determine if the integrated sensor has been previously calibrated upon a reset. When it has been determined the integrated sensor has not been previously calibrated, an automated calibration pattern may be imparted to the sensor so that a calibration parameter is determined.

Abstract: In a method of motion sensor calibration, a motion with which to calibrate a motion sensor is determined. The motion sensor is controlled by a sensor processor and the motion sensor is comprised within a user interface that is coupled with a gaming engine. The sensor processor and the gaming engine coordinate regarding the motion. The sensor processor monitors the motion sensor for evidence of the motion made as a user input via the user interface in response to game content implemented by the gaming engine, based on the coordination, to incite the motion. The sensor processor calibrates the motion sensor with the motion.

Abstract: A method for analyzing the game of a user of a racket (Ra) includes detecting an impact on the racket (Ra) from representative measurements of a shock to the racket (Ra) provided by a sensor assembly comprising at least one sensor sensitive to shocks linked to the racket (Ra) in a fixed manner in terms of movement. A moment of impact is associated with a detected impact, from the measurements transmitted by the sensor assembly. The impacts that are not related to strokes from a set of pre-determined strokes are eliminated on the basis of angular rotational velocity measurements, provided by a gyrometer (G) of the sensor assembly with at least one measurement axis and linked to the racket (Ra) in a fixed manner in terms of movement, taken during an interval of time around said moment of impact.

Abstract: A system and method of controlling a cursor (120) in a surface (100) by measurements of attitude of a pointer (110). The measurements can be provided by inertial, optical, magnetic, ultrasound, radiofrequency or video means and appropriate processing means. The method includes a step of computing the displacements of the intersection of a vector tied to the pointer with a projection surface. The projection surface can be predetermined on the basis of the measurements of the attitude and/or of the angular velocity of the pointer. The pointed-at surfaces can be planes, cylinders or spheres. The pointing can be performed in limited fashion or by sliding. The control of the cursor, in absolute mode or in relative mode, can allow the triggering of functions controlled by the orientation of the cursor on the pointed-at surface.

Abstract: A pressure sensor of a mobile device may be corrected by receiving reference pressure information from an associated device. The correction using differential pressure measurements may be influenced by one or more determined condition characteristics.

Abstract: A method for filtering the signals arising from a sensor assembly (EC) comprising at least one measurement sensor for measuring a vector physical field which is substantially constant over time and in space in a reference frame, said sensor assembly (EC) being tied in motion to a moving frame, moving in the reference frame, the method comprising the steps consisting in: applying a first transformation (T1) to the measurements of a measurement sensor of the sensor assembly (EC) which are provided in the moving frame, to a pseudo reference frame, with the aid of a first change-of-frame operator (R(t)) by rotation between the moving frame and the pseudo reference frame; and applying a filtering (FILT) to the measurements thus transformed in the pseudo reference frame; and applying a second transformation (T2), the inverse of said first transformation, to the measurements filtered by said filtering (FILT), from the reference frame to the moving frame, with the aid of a second change-of-frame operator (R?1(t))

Abstract: Systems and methods are disclosed for calibrating a pressure sensor associated with a mobile device. The reference pressure information may be obtained from an associated device and then be used to calibrate the pressure sensor.

Abstract: 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.

Abstract: A system and method of controlling a cursor (120) in a surface (100) by measurements of attitude of a pointer (110). The measurements can be provided by inertial, optical, magnetic, ultrasound, radiofrequency or video means and appropriate processing means. The method includes a step of computing the displacements of the intersection of a vector tied to the pointer with a projection surface. The projection surface can be predetermined on the basis of the measurements of the attitude and/or of the angular velocity of the pointer. The pointed-at surfaces can be planes, cylinders or spheres. The pointing can be performed in limited fashion or by sliding. The control of the cursor, in absolute mode or in relative mode, can allow the triggering of functions controlled by the orientation of the cursor on the pointed-at surface.

Abstract: An iterative method determines a bias of a sensor for measuring a substantially continuous physical vector field in a reference frame, in which the sensor is linked in movement to a frame that is mobile in the reference frame. An iteration of the method includes: estimating a bias value in the mobile frame, correcting a measurement from the sensor of the estimated bias value, in the mobile frame, transforming the corrected measurement of the mobile frame in the reference frame, from a rotational change of frame operator between the mobile frame and the reference frame, and forming a criterion representative of a variation of the transformed corrected measurement.

Abstract: A system and method of controlling a cursor (120) in a surface (100) by measurements of attitude of a pointer (110). The measurements can be provided by inertial, optical, magnetic, ultrasound, radiofrequency or video means and appropriate processing means. The method includes a step of computing the displacements of the intersection of a vector tied to the pointer with a projection surface. The projection surface can be predetermined on the basis of the measurements of the attitude and/or of the angular velocity of the pointer. The pointed-at surfaces can be planes, cylinders or spheres. The pointing can be performed in limited fashion or by sliding. The control of the cursor, in absolute mode or in relative mode, can allow the triggering of functions controlled by the orientation of the cursor on the pointed-at surface.

Abstract: Device for determining a characteristic of a trajectory formed of successive positions of a triaxial accelerometer (3A) rigidly tied to a mobile element (EM), between a first instant of immobility (t0) and a second instant of immobility (tn) of the triaxial accelerometer (3A), subsequent to said first instant of immobility (t0), said device comprising, furthermore, a triaxial additional sensor for measuring a vector of a substantially constant vector field between said first and second instants of immobility (t0,tn), in a fixed global reference frame (GE) tied to the terrestrial reference frame, said additional sensor being rigidly tied to said mobile element (EM) and fixed in the reference frame of the accelerometer (3A), and control means (CMD).

Abstract: A method for analyzing the game of a user of a racket (Ra) includes detecting an impact from representative measurements of a shock to the racket (Ra) provided by a sensor assembly. The sensor assembly includes at least one sensor sensitive to shocks and is connected to the racket (Ra). A moment of impact is associated with a detected impact, using the measurements transmitted by the sensor assembly. Impacts that are not related to strokes from a set of pre-determined strokes are eliminated on the basis of angular rotational velocity measurements, provided by a gyrometer (G) of the sensor assembly with at least one measurement axis and linked to the racket, taken during an interval of time around the moment of impact.

Abstract: A system and method of controlling a cursor (120) in a surface (100) by measurements of attitude of a pointer (110). The measurements can be provided by inertial, optical, magnetic, ultrasound, radiofrequency or video means and appropriate processing means. The method includes a step of computing the displacements of the intersection of a vector tied to the pointer with a projection surface. The projection surface can be predetermined on the basis of the measurements of the attitude and/or of the angular velocity of the pointer. The pointed-at surfaces can be planes, cylinders or spheres. The pointing can be performed in limited fashion or by sliding. The control of the cursor, in absolute mode or in relative mode, can allow the triggering of functions controlled by the orientation of the cursor on the pointed-at surface.

Abstract: 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.

Abstract: 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.

Abstract: Device for determining a characteristic of a trajectory formed of successive positions of a triaxial accelerometer (3A) rigidly tied to a mobile element (EM), between a first instant of immobility (t0) and a second instant of immobility (tn) of the triaxial accelerometer (3A), subsequent to said first instant of immobility (t0), said device comprising, furthermore, a triaxial additional sensor for measuring a vector of a substantially constant vector field between said first and second instants of immobility (t0,tn), in a fixed global reference frame (GE) tied to the terrestrial reference frame, said additional sensor being rigidly tied to said mobile element (EM) and fixed in the reference frame of the accelerometer (3A), and control means (CMD).