摘要:
A monitoring method that includes calculating the autonomy of a lubrication system of an airplane engine and also providing for the diagnosis and prognosis of a plurality of problems and breakdowns of the engine and of its lubrication system by means of measurements taken by sensors arranged in the lubrication system. The method further comprises the step of calculating the status of the lubrication system at a given moment and calculating its evolution over time in order to determine the remaining lifetime before a breakdown.
摘要:
The present invention relates to an overall monitoring method allowing to calculate the autonomy of a lubrication system of an airplane engine and also allowing the diagnosis and prognosis of a plurality of problems and breakdowns of the engine and of its lubrication system by means of measurements taken by sensors arranged in said lubrication system, the method comprising the step of calculating the status of the lubrication system at a given moment and calculating its evolution over time in order to determine the remaining lifetime before a breakdown.
摘要:
A bypass axial turbomachine includes a fan, a low pressure stator stage, a high pressure stator stage, the compressors being traversed by a flow referred to as primary flow of the turbomachine, at least one passage of discharge flow rate controlled from the primary flow in one of the stator stages toward the secondary flow, a heat exchanger of the surface air-oil (ACOC) type arranged flat on or in the wall surrounding the stator stages and defining the internal surface of the secondary flow, directly downstream of the junction of the passage of the discharge flow rate with said wall, so as to be run through by the secondary flow enriched with the discharge flow rate.
摘要:
A bypass axial turbomachine includes a fan, a low pressure stator stage, a high pressure stator stage, the compressors being traversed by a flow referred to as primary flow of the turbomachine, at least one passage of discharge flow rate controlled from the primary flow in one of the stator stages toward the secondary flow, a heat exchanger of the surface air-oil (ACOC) type arranged flat on or in the wall surrounding the stator stages and defining the internal surface of the secondary flow, directly downstream of the junction of the passage of the discharge flow rate with said wall, so as to be run through by the secondary flow enriched with the discharge flow rate.
摘要:
The invention is concerned with civil engineering. It relates to a system for guiding the excavation tool used for making the trenches necessary for the construction panel-by-panel of a wall cast in the ground, which comprises, in combination, a vertical guide member extending over the height of the trench to be made and fixed to the adjacent panel or to a formwork located at the end of the adjacent panel, and guide wheels mounted on the excavation tool and rolling on the said member, said guide wheels being retained positively by the guide member relative to any horizontal force tending to separate them, and some wheel being profiled so as to be capable of destroying any obstacle of hardened concrete present on the guide member.
摘要:
This invention relates to a cupola-type visual stimulation ophthalmologicalpparatus for examining the visual field of a patient and performing electrophysiological examinations. It comprises a projection screen consisting of the inner surface of a hemispherical cupola, the patient's eye being disposed centrally of the cupola during the examination. A device for projecting visual stimuli on the screen is provided in the upper portion of the cupola and comprises essentially a casing incorporating a light source, filter means, an object mask, a lens and a movable reflecting mirror located in the vicinity of the cupola center. This mirror is adapted to project toward any desired point of the screen a luminous stimulus perceived by the patient for measuring the extent of the patient's visual field. Moreover, with the projection device it is possible to illuminate the complete visual field according to criteria relating specifically to electrophysiological examinations. For this purpose, the casing comprises a window adapted to be masked for examining the visual field and to be opened for making electrophysiological examinations, the light rays from the light source being deflected through the window for illuminating the complete screen surface. The various optical control members necessary for performing visual tests can also be used for electrophysiological examinations since the projection device is polyvalent and thus capable of accomplishing both types of examinations.
摘要:
Process for guiding the excavation tool used in order to execute the trenches necessary for the construction, by successive or alternating panels, of a wall cast in the ground, according to which:a) an excavation tool fitted with a first guiding element is provided,b) at the end of a previously executed trench, a second guiding element is arranged extending substantially over the entire depth of this trench, and thenc) after construction of the panel in the previously executed trench, the guiding elements are mutually engaged; andd) the excavation tool is controlled so as to create a force tending to keep the guiding elements mutually engaged while the excavation of the following trench is performed.
摘要:
The invention relates to a method for automatic control of means for adjusting an apparatus for observing a subject in the sight of at least one person. It is characterized in that to command the displacement of the visual field (7) to a zone of the subject that the observer wishes to have appear as a zone of vision, relative to the reference system (R) associated with each optical system (4) at the time of its definition, the principle is altered in a variable manner as a function of the magnitude of the angle measured between the sight direction and the optical axis, which makes it possible to isolate in imaginary fashion, in the field of sight (14), at least one central field (15) having its axis approximately coincident with the optical axis (9) of the optical system (4) in question, in the form of a cone with its apex (S) substantially coincident with the center of the pupil of at least one eye of the observer and having its envelope at least partly contained in the visual field (7) and then to divide the field of sight (14) in imaginary fashion into approximately at least two coaxial volumes (16, 17, 18).