Abstract: The general field of the invention is that of systems for detecting the posture of a moving object. The system may include a fixed electro-optical device of known orientation comprising an emission source, an image sensor and image analysis means, and an optical assembly comprising an optical retroreflector arranged on the moving object. The optical retroreflector of the system is an optical sphere of variable index comprising a transparent hemisphere and a reflecting hemisphere. It comprises a meshing comprising at least three opaque wires, of small thickness and known geometrical arrangement. The image of the retroreflector lit by the source forms a reflection on the image sensor, said reflection comprising at least the two images of the shadow of one of the three wires. The image analysis means detect the orientation of the leak line given by said images, said orientation being representative of one of the parameters of the posture of the moving object.

Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object in space. The system according to the invention comprises an electro-optical device comprising a light source, a photoreceptor and means of analysis, and a retro-reflecting cube corner disposed on the mobile object. The cube corner comprises a mask disposed on its entry face. The source emits a parallel or almost-parallel pencil beam. The electro-optical device comprises means for deviating, about a fixed point, the said pencil beam of light by an angle varying as a function of time. The photoreceptor is configured for receiving the pencil beam of light retro-reflected by the cube corner. The means of analysis are configured in such a manner as to determine, based on the signal coming from the photoreceptor, the position of a number of points representative of the borders of the mask and, using this positional information, the posture of the cube corner in space.

Abstract: The general field of the invention is that of systems for detecting the posture of a moving object. The system may include a fixed electro-optical device of known orientation comprising an emission source, an image sensor and image analysis means, and an optical assembly comprising an optical retroreflector arranged on the moving object. The optical retroreflector of the system is an optical sphere of variable index comprising a transparent hemisphere and a reflecting hemisphere. It comprises a meshing comprising at least three opaque wires, of small thickness and known geometrical arrangement. The image of the retroreflector lit by the source forms a reflection the image sensor, said reflection comprising at least the two images of the shadow of one of the three wires. The image analysis means detect the orientation of the leak line given by said images, said orientation being representative of one of the parameters of the posture of the moving object.

Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object. The systems according to the invention comprise a fixed electro-optical device comprising an emission source and a photosensitive sensor. The optical corner cube is arranged on the mobile object. The entry face of the corner cube has a predetermined geometry, the light coming from the source and reflected back by the corner cube forming a luminous contour on the matrix sensor. The fixed electro-optical device comprises an optical element with a known shape and location, which is placed in the vicinity of the said source and is arranged so as to form a dark zone in the central part of the luminous contour. The detection system comprises analysis means determining the position and the orientation of the mobile object from knowledge of the vanishing points of the luminous contour and the position and shape of the dark zone.

Abstract: The overall field of the invention is that of systems for detecting the posture of a moving object in space. The device according to the invention comprises: a fixed electrooptical device comprising a point emission source, a telecentric lens comprising a projection lens, a reception lens and a semireflective optical element and a photosensitive matrix-type sensor, the point emission source being arranged at the common focal point of the projection lens and of the reception lens by reflection or transmission through the semireflective optical element, and; an assembly comprising at least three corner cube retroreflectors which are arranged on the moving object. The main application of this device is the detection of the orientation of an aircraft pilot helmet.

Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object in space. The system according to the invention comprises an electro-optical device comprising a light source, a photoreceptor and means of analysis, and a retro-reflecting cube corner disposed on the mobile object. The cube corner comprises a mask disposed on its entry face. The source emits a parallel or almost-parallel pencil beam. The electro-optical device comprises means for deviating, about a fixed point, the said pencil beam of light by an angle varying as a function of time. The photoreceptor is configured for receiving the pencil beam of light retro-reflected by the cube corner. The means of analysis are configured in such a manner as to determine, based on the signal coming from the photoreceptor, the position of a number of points representative of the borders of the mask and, using this positional information, the posture of the cube corner in space.

Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object. The systems according to the invention comprise a fixed electro-optical device comprising an emission source and a photosensitive sensor. The optical corner cube is arranged on the mobile object. The entry face of the corner cube has a predetermined geometry, the light coming from the source and reflected back by the corner cube forming a luminous contour on the matrix sensor. The fixed electro-optical device comprises an optical element with a known shape and location, which is placed in the vicinity of the said source and is arranged so as to form a dark zone in the central part of the luminous contour. The detection system comprises analysis means determining the position and the orientation of the mobile object from knowledge of the vanishing points of the luminous contour and the position and shape of the dark zone.

Abstract: The general field of the invention is that of systems for optically detecting the posture of an object which is mobile in space. The system according to the invention comprises an optical assembly comprising a plurality of optical corner cubes arranged on the mobile object. The entry face of the corner cubes is divided into three separate coloured regions having a spectral transmission filter transmitting only a predetermined spectral band different from those of the other filters, each side of the said coloured regions has a specific marking making it possible to identify this said side, and the spectrum of the emission source has a spectral width equal to the sum of the spectral bands of the said filters. The associated fixed electro-optical device of known orientation comprises at least one colour matrix sensor and the image analysis means comprise means for determining shapes and geometrical characteristics in the images received by the colour matrix sensor or sensors.

Abstract: The field of the invention is that of optical systems for detecting the posture of a mobile object in space. The system comprises an electro-optical fixed device of known orientation comprising a first point emission source, a telecentric emission/reception optic and a photosensitive matrix sensor. An assembly comprising an optical cubic wedge is disposed on the mobile object. The input face of the cubic wedge comprises a mask in the shape of a parallelogram, each side of the parallelogram comprising a geometric marking making it possible to identify it, the image of the mask projected on the photosensitive matrix sensor, by reflection on the faces of the cubic wedge, being the intersection of the projection of the mask and of the projection of its image inverted with respect to the centeR of the cubic wedge. Analysis of this image makes it possible to determine the orientation of the cubic wedge.

Abstract: The general field of the invention is that of systems for the optical detection of the orientation and the position of a mobile object in space. The system comprises a fixed electro-optical device comprising a transmission point source, image analysis means and an optical cube corner disposed on the mobile object. The input surface of the cube corner comprises a polygonal-shaped mask, the sides of which comprise a geometric marking to identify them. The fixed electro-optical device comprises photosensitive means close to the point source and disposed in two different recording planes and recording two luminous shapes in perspective of the mask obtained by reflection on the surfaces of the cube corner. The image analysis means comprise means for determining the vanishing points of the two luminous shapes in the two recording planes, the knowledge of the four vanishing points enabling the determination of the position and orientation of the optical cube corner in relation to the fixed electro-optical device.

Abstract: The electro-optical system for determining position and orientation of a mobile part comprises a fixed projector having a center of projection (O) and a mobile part. The projector is rigidly linked with a virtual image plane, and the mobile part is rigidly linked with two linear sensors defining a first and a second direction vector. The fixed part projects onto the image plane and onto the sensors patterns, not represented, forming at least two secant networks of at least three segments that are each parallel. The two electro-optical devices are coplanar and their directions secant, the orientation and the position of the mobile part are determined by calculating the positions of the projections on the image plane of a first triple of points comprising the projections of three points.

Abstract: The general field of the invention is that of systems for the optical detection of the orientation and the position of a mobile object in space. The system comprises a fixed electro-optical device comprising a transmission point source, image analysis means and an optical cube corner disposed on the mobile object. The input surface of the cube corner comprises a polygonal-shaped mask, the sides of which comprise a geometric marking to identify them. The fixed electro-optical device comprises photosensitive means close to the point source and disposed in two different recording planes and recording two luminous shapes in perspective of the mask obtained by reflection on the surfaces of the cube corner. The image analysis means comprise means for determining the vanishing points of the two luminous shapes in the two recording planes, the knowledge of the four vanishing points enabling the determination of the position and orientation of the optical cube corner in relation to the fixed electro-optical device.

Abstract: The optical device for determining position and orientation of an object comprising a fixed part comprises a laser beam projector with sequential scan and a projection centre (O), defining the centre of a reference frame (R) in space. The projector emits, in a zone comprising at least four sensors fixed to the said object, the four sensors having a known disposition on the object. The instants at which each of the sensors provides an electrical pulse determine the angular directions of the said sensors in the reference frame, the four straight lines passing through the origin and through each of the sensors intercepting an image plane of the fixed part at four projected points. The positions in the image plane of the mappings of the four points determine a geometric shape making it possible to calculate the position and the orientation of the object in space.

Abstract: The field of the invention is that of optical systems for detecting the posture of a mobile object in space. The system comprises an electro-optical fixed device of known orientation comprising a first point emission source, a telecentric emission/reception optic and a photosensitive matrix sensor. An assembly comprising an optical cubic wedge is disposed on the mobile object. The input face of the cubic wedge comprises a mask in the shape of a parallelogram, each side of the parallelogram comprising a geometric marking making it possible to identify it, the image of the mask projected on the photosensitive matrix sensor, by reflection on the faces of the cubic wedge, being the intersection of the projection of the mask and of the projection of its image inverted with respect to the centre of the cubic wedge. Analysis of this image makes it possible to determine the orientation of the cubic wedge.

Abstract: The general field of the invention is that of optical systems for detection of the orientation of mobile objects in space. The main application is helmet posture detection inside of an aircraft cockpit. The system according to the invention operates by interferometry. It comprises a fixed electro-optical device comprising one or more collimated point-like emission sources and a detection assembly comprising one or more point-like photosensitive detectors. Two or more retro-reflecting devices referred to as “cube corner” are disposed on the mobile object. This system can be completed by optical means operating in polarized light mode allowing the direction of variation of the interference fringes to be determined and by other optical devices allowing an initial orientation to be measured.

Abstract: The overall field of the invention is that of systems for detecting the posture of a moving object in space. The device according to the invention comprises: a fixed electrooptical device comprising a point emission source, a telecentric lens comprising a projection len a reception lens and a semireflective optical element and a photosensitive matrix-type sensor, the point emission source being arranged at the common focal point of the projection lens and of the reception lens by reflection or transmission through the semireflective optical element, and; an assembly comprising at least three retroreflector devices of the “corner cube” type which are arranged on the moving object. The main application of this device is the detection of the orientation of an aircraft pilot helmet.

Abstract: The general field of the invention is that of optical devices for detecting the position/orientation of a helmet. The device according to the invention comprises an optional stationary light source, a stationary camera associated with an image processing system, and a helmet. The helmet has a scattering coating and includes at least one set of markers, each marker comprising at least a first optical element having a very low reflection coefficient, a very low scattering coefficient and a very high absorption coefficient in the visible range and in that of the light source. In one embodiment, each marker may also include a first optical element having a very high retroreflection coefficient and a very low scattering coefficient in the visible range. The marker may also include a second optical element having a high scattering or phosphorescence coefficient in the emission range of the light source.

Abstract: The electro-optical system for determining position and orientation of a mobile part comprises a fixed projector having a centre of projection (O) and a mobile part. The projector is rigidly linked with a virtual image plane, and the mobile part is rigidly linked with two linear sensors defining a first and a second direction vector. The fixed part projects onto the image plane and onto the sensors patterns, not represented, forming at least two secant networks of at least three segments that are each parallel.

Abstract: The optical device for determining position and orientation of an object comprising a fixed part comprises a laser beam projector with sequential scan and a projection centre (O), defining the centre of a reference frame (R) in space. The projector emits, in a zone comprising at least four sensors fixed to the said object, the four sensors having a known disposition on the object. The instants at which each of the sensors provides an electrical pulse determine the angular directions of the said sensors in the reference frame, the four straight lines passing through the origin and through each of the sensors intercepting an image plane of the fixed part at four projected points. The positions in the image plane of the mappings of the four points determine a geometric shape making it possible to calculate the position and the orientation of the object in space.

Abstract: The balancing device includes static weights, equally distributed by mass in two housings elongated along the span of the blade, and dynamic weights distributed by mass in the two housings so as to ensure the dynamic adjustment of the blade while keeping the preestablished static adjustment, the weights being introduced into the housings and extracted from these latter through a single opening emerging simultaneously in the internal end, towards the blade root, of the two housings symmetrical relative to the pitch centring axis of the blade. This single access opening is able to be closed by a door opening in the extrados or intrados surface of the blade.