Abstract: A method of inspecting packages with the help of a linear image sensor comprises the steps of: for each movement increment, cyclically acquiring a sequence of n successive image lines (l1, l2, . . . , ln), the n image lines of each sequence being obtained with exposure times (Ti) and/or lighting conditions (Ek) that are different; grouping together the image lines (l1, l2, . . . , ln) obtained in the sequences while using both the same exposure times (Ti) and the same lighting conditions (Ek) so as to obtain n? superposable images (I1, I2, . . . , In) of at least j image lines; and analyzing the n? superposable images (I1, I2, . . . , In) separately or in combination in order to determine at least one characteristic of the packages. A device for package inspection includes a process and control unit that employs the steps of the method.

Abstract: The invention relates to a method of inspecting packages with the help of a linear image sensor. According to the invention the method comprises the steps of: for each movement increment, cyclically acquiring a sequence of n successive image lines (l1, l2, . . . , ln), the n image lines of each sequence being obtained with exposure times (Ti) and/or lighting conditions (Ek) that are different; grouping together the image lines (l1, l2, . . . , ln) obtained in the sequences while using both the same exposure times (Ti) and the same lighting conditions (Ek) so as to obtain n superposable images (I1, I2, . . . , In) of at least j image lines; and analyzing the n images (I1, I2, . . . , In) separately or in combination in order to determine at least one characteristic of the packages.

Abstract: The wheel comprises a central portion, or rim provided with blades at its peripheral portion and is made of a single piece of composite material formed by a fibrous reinforcement densified by a matrix. The fibrous reinforcement is formed from a helical fabric with radially oriented fibers and circumferentially oriented fibers. The density of fibers in a radial direction and the density of fibers in a circumferential direction varies along a radius of the wheel as a function of the variations of the radial stresses and circumferential stresses that are exerted on the wheel when it is in operation. At least part of the circumferentially oriented fibers in the rim are made of a material having high mechanical resistance, while at least part of circumferentially oriented fibers in the blades and at least part of the axially oriented fibers are made of a material having good resistance to high temperatures and chemical attacks.

Abstract: Sintered ceramic elements are associated to at least one composite material layer having a fibrous reinforcement arrangement and a ceramic matrix located behind the sintered ceramic elements.

Abstract: This invention relates to a process for manufacturing a turbine or compressor wheel made of composite material, comprising the following steps of:making at least two helicoidal textures each formed by weaving a spiral band with helicoidal warp yarns and weft yarns which are substantially perpendicular to the axis of the texture,assembling the helicoidal textures by "screwing" them in each other and stacking them by mutually approaching their interlaced turns, anddensifying the stack thus made to obtain a preform of a turbine or compressor wheel.

Abstract: This invention relates to a process for manufacturing a turbine or compressor wheel made of composite material, comprising the following steps of:making at least two helicoidal textures each formed by weaving a spiral band with helicoidal warp yarns and weft yarns which are substantially perpendicular to the axis of the texture,assembling the helicoidal textures by "screwing" them in each other and stacking them by mutually approaching their interlaced turns, anddensifying the stack thus made to obtain a preform of a turbine or compressor wheel.

Abstract: The present invention relates to abradable rings for turbines, wherein they are constituted by an abradable refractory material and are formed by at least one open ring maintained clamped against a fixed metallic structure with the aid of at least one spring, and to refractory materials which may be used for making said rings.