Abstract: A method for determining trajectory of a mobile object, including: provision of an object including sensors; displacement of the sensors along one and the same trajectory, the sensors maintaining one and the same distance between themselves and each measuring one and the same physical quantity; determination of instants for which the object has travelled an aggregate curvilinear distance which is equal to an integer multiple of the distance and calculation of a direction tangent to the trajectory of the object, for each of the instants determined; automatic reconstruction of the trajectory followed by the mobile object during its displacement by an interpolation, based on, for each reference instant determined, the measured tangent calculated for the reference instant.

Abstract: A guide system including a railway rail extending along an axis and including an upper element having a rolling face; a lower element having a bearing face; a connecting element between the lower and upper elements, at least one lateral recess being formed between the lower and upper elements; at least first and second attitude sensors fixed to the rail by glue at respective positions offset along the axis of the rail, the attitude sensors being housed at least partially in the lateral recess; a processing circuit configured to recover attitude measurements supplied by the first and second attitude sensors and configured to calculate a deformation of the railway rail relative to the axis as a function of the recovered attitude measurements.

Abstract: A method for determining the bend of a tubular structure, including determining the inclination of first and second rigid objects fixed in distinct locations along the tubular structure. The method includes supplying accelerometers (A1, . . . AN) rigidly linked by the object to measure an acceleration in at least one direction of measurement (vj), the respective directions of measurement of at least two of said accelerometers being non-collinear. The measurement, by the accelerometers, of the components of the Earth's gravitational field along said directions of measurement, the measurement providing, for each of said directions, a measurement value, denoted mj for a measurement direction of index i. The method includes solving a defined matrix equation to determine the inclination ? of the object relative to the reference frame of reference.

Abstract: A concrete structural element is provided that includes a concrete matrix; a steel reinforcing structure embedded in said matrix; at least first and second attitude sensors at a distance from one another in a direction, embedded in said matrix and fixed to said reinforcing structure; and a processing circuit configured to recover attitude measurements supplied by each attitude sensor and configured to compute a deformation of said structural element relative to said direction as a function of the attitude measurements recovered.

Abstract: A guide system including a railway rail extending along an axis and including an upper element having a rolling face; a lower element having a bearing face; a connecting element between the lower and upper elements, at least one lateral recess being formed between the lower and upper elements; at least first and second attitude sensors fixed to the rail by glue at respective positions offset along the axis of the rail, the attitude sensors being housed at least partially in the lateral recess; a processing circuit configured to recover attitude measurements supplied by the first and second attitude sensors and configured to calculate a deformation of the railway rail relative to the axis as a function of the recovered attitude measurements.

Abstract: A concrete structural element is provided that includes a concrete matrix; a steel reinforcing structure embedded in said matrix; at least first and second attitude sensors at a distance from one another in a direction, embedded in said matrix and fixed to said reinforcing structure; and a processing circuit configured to recover attitude measurements supplied by each attitude sensor and configured to compute a deformation of said structural element relative to said direction as a function of the attitude measurements recovered.

Abstract: A method for determining trajectory of a mobile object, including: provision of an object including sensors; displacement of the sensors along one and the same trajectory, the sensors maintaining one and the same distance between themselves and each measuring one and the same physical quantity; determination of instants for which the object has travelled an aggregate curvilinear distance which is equal to an integer multiple of the distance and calculation of a direction tangent to the trajectory of the object, for each of the instants determined; automatic reconstruction of the trajectory followed by the mobile object during its displacement by an interpolation, based on, for each reference instant determined, the measured tangent calculated for the reference instant.

Abstract: Determining an object's inclination fixed reference frame relative to a gravity field includes supplying circularly disposed accelerometers rigidly linked by the object and measuring in non-collinear directions. A radius linking it to the circle's center defines an accelerometer's measurement direction. The accelerometers measure components of the field along the measurement directions to provide measurement values. Then, a matrix equation is solved to obtain the object's inclination relative to the reference frame.

Abstract: A method for determining the bend of a tubular structure, including determining the inclination of first and second rigid objects fixed in distinct locations along the tubular structure. The method includes supplying accelerometers (A1, . . . AN) rigidly linked by the object to measure an acceleration in at least one direction of measurement (vj), the respective directions of measurement of at least two of said accelerometers being non-collinear. The measurement, by the accelerometers, of the components of the Earth's gravitational field along said directions of measurement, the measurement providing, for each of said directions, a measurement value, denoted mj for a measurement direction of index i. The method includes solving a defined matrix equation to determine the inclination ? of the object relative to the reference frame of reference.

Abstract: Determining an object's inclination fixed reference frame relative to a gravity field includes supplying circularly disposed accelerometers rigidly linked by the object and measuring in non-collinear directions. A radius linking it to the circle's center defines an accelerometer's measurement direction. The accelerometers measure components of the field along the measurement directions to provide measurement values. Then, a matrix equation is solved to obtain the object's inclination relative to the reference frame.

Abstract: A stand-alone device for navigating in a space having at least three dimensions comprises a housing capable of being manipulated by a user. The housing houses means for generating signals that represent the inclination of the housing according to its pitch axes, rolling axes and yaw axes, and houses at least one isometric device that generates a control signal of a bi-directional displacement according to at least one axis of said space. The invention is used, in particular, for navigating in a virtual space.

Abstract: The main object of the present invention is a device for detecting a relative position of a first element (12, 14) having a main mechanical function and a second element, including an electric circuit (4) the opening and closing of which respectively correspond to a first and a second position of the first and second elements with respect to each other, wherein at least the first element is part of the electric circuit (4). An object of the present invention is also a monitoring installation comprising such detecting devices.

Abstract: The movement detector having six degrees of freedom comprises a support on which three position sensors are arranged according to three orthogonal axes. Each sensor comprises a rigid body (3), a deformable element (4) which is electrically conductive, and four conductive areas (6b) which are disposed on rigid walls (3). The deformable element (4) is balanced around the centre part thereof and has a rest position and four active positions wherein it is temporarily in contact with two of the conductive areas (6b) of the rigid body (3). The deformable element (4) of a sensor moves from a rest position to one of the active positions in response to a predetermined directional or axial translation or votation.

Abstract: The main object of the present invention is a device for detecting a relative position of a first element (12, 14) having a main mechanical function and a second element, including an electric circuit (4) the opening and closing of which respectively correspond to a first and a second position of the first and second elements with respect to each other, wherein at least the first element is part of the electric circuit (4). An object of the present invention is also a monitoring installation comprising such detecting devices.

Abstract: A stand-alone device for navigating in a space having at least three dimensions comprises a housing capable of being manipulated by a user. The housing houses means for generating signals that represent the inclination of the housing according to its pitch axes, rolling axes and yaw axes, and houses at least one isometric device that generates a control signal of a bi-directional displacement according to at least one axis of said space. The invention is used, in particular, for navigating in a virtual space.

Abstract: The movement detector having six degrees of freedom comprises a support on which three position sensors are arranged according to three orthogonal axes. Each sensor comprises a rigid body (3), a deformable element (4) which is electrically conductive, and four conductive areas (6b) which are disposed on rigid walls (3). The deformable element (4) is balanced around the centre part thereof and has a rest position and four active positions wherein it is temporarily in contact with two of the conductive areas (6b) of the rigid body (3). The deformable element (4) of a sensor moves from a rest position to one of the active positions in response to a predetermined directional or axial translation or votation.