Abstract: The present invention relates to a system (100) for determining that an electromagnetic disturbance is impairing measurements made by an electromagnetic tracking unit (200) during a surgery, the system comprising the electromagnetic tracking unit (200) configured to track relative poses of at least two bone portions linked to one another by at least one joint, based on measurements of an electromagnetic field emitted and received, respectively, by at least two electromagnetic transducers (201, 202) of the electromagnetic tracking unit (200), at least one storage unit (301) in which at least one kinematic pattern of authorized relative displacements of the tracked bone portions with respect to one another is recorded, and one data processor (302) in communication with the storage unit (301) and with the electromagnetic tracking unit (200), wherein the data processor (302) is configured to receive the tracked relative poses of the bone portions with respect to one another and compute a real-time kinem

Abstract: According to the invention, the method comprises exposing a surface (3) sensitive to relative wind and monitoring the thermal flow variations between the surface (3) and the aerodynamic flow, said variations resulting from that of the forced-convection thermal exchange coefficient between the surface (3) and the aerodynamic flow depending on the rime or ice build-up, using the temperature sensor (12) under the surface (3), considering that stripping occurs by the flow of an ice layer formed on the surface (3) if it is detected, preferably after heating by at least one heater (4), that there is a brisk rise of the flow at a temperature close to 0° C., and supplying after the detection of ice stripping, a signal indicating the presence of rime or rime conditions. A cooler (5) may cool the surface (3) for anticipating the formation of ice with a heating process. The invention can be used for detecting rime and/or rime conditions on a flying aircraft.

Abstract: According to the invention, the method comprises exposing a surface (3) sensitive to relative wind and monitoring the thermal flow variations between the surface (3) and the aerodynamic flow, said variations resulting from that of the forced-convection thermal exchange coefficient between the surface (3) and the aerodynamic flow depending on the rime or ice build-up, using the temperature sensor (12) under the surface (3), considering that stripping occurs by the flow of an ice layer formed on the surface (3) if it is detected, preferably after heating by at least one heater (4), that there is a brisk rise of the flow at a temperature close to 0° C., and supplying after the detection of ice stripping, a signal indicating the presence of rime or rime conditions. A cooler (5) may cool the surface (3) for anticipating the formation of ice with a heating process. The invention can be used for detecting rime and/or rime conditions on a flying aircraft.

Abstract: A tag equipped with markers and, notably, optical markers that also include an electronic label that is adhered and that transmits the relative positions of the tags, or other characteristics of the tags, to a measuring system using telecommunication. Confusion between various tags can thus be avoided, and a greater interaction between the measuring system and the tag can be obtained.

Abstract: A device for controlling a continuous movement of an object with symmetry of revolution (1) comprises a conveyor (5) having two parallel guides, (6) and at least one pair of belts (8) stretched on the guides, between and on which these objects move at the level of the guides. These belts form an angle (11) between a top track and a lower track of each of the belts. The belts in the pair have the same direction of rotation around the guides, the same value of the measured angle (11) from the upper track to the lower track, and the same displacement speed. Preferably, the pair of belts consists of a single folded belt.

Abstract: This invention relates to a device for controlling a continuous movement of an object with symmetry of revolution (1) comprising a conveyor (5), characterized in that the conveyor comprises two parallel guides (6) and at least one pair of belts (8) stretched on the guides, between and on which these objects move at the level of the guides, these belts forming an angle (11) between a top track and a lower track of each of the belts, the belts in the pair having the same direction of rotation around the guides, the same value of the measured angle (11) from the upper track to the lower track, and the same displacement speed. Preferably, the pair of belts consists of a single folded belt.

Abstract: A method and an apparatus for detecting and identifying a contaminant, such as ice, on the surface of a structure, such as a wing, are disclosed. The apparatus has a probe having a delay block with an interface apt to be placed flush with the surface of the structure and two faces at the same angle of inclination relative to the interface and having transmission and reception transducers each oriented perpendicularly to one of the faces. The block has an acoustic impedance lying in the range of 0.7 to 3.times.10.sup.6 kg/m.sup.2.s. It further has an energization and analysis unit for applying an electrical energization pulse to the transmission transducer and comparing the amplitude and the phase of the echo from the interface with a reference echo corresponding to no contamination.