Etat Francais Represente Par Le Delegue General Pour L'armement

Silmach

Pascal Girardin

Patrice Minotti

Vianney Sadoulet

Pierre-Francois Louvigne

Vincent Walter

Charles Haye

Thierry Cote

Pierre-François LouvignÉ

A deformation passive sensor includes a system for detecting a variation in the distance between two points or regions of a structure, and a carrier having first and second parts configured to be fixed to the points or regions. The system includes a measuring assembly carried by the first part and actuatable only in one measurement direction in order to measure and store a measurement associated with at least one deformation in a measurement direction, and an actuating device including an intermediary assembly having an actuating member for actuating the measuring assembly, and an actuating assembly having a push part facing the intermediary assembly and configured such that the actuating member is moved with respect to the measuring assembly only when the second part moves in the measurement direction.

Strain sensor with measurement discrimination according to the deformation direction

Disclosed is a method for counting events occurring during a period T carried out by a mechanical counter including two toothed wheels with the same pitch, the occurrence of an event causing the rotation of each wheel by an angle corresponding to the pitch of the teeth thereof, the method including: counting or calculating, for each wheel at the end of T, the difference in the number of teeth between the initial and final position thereof, the step being at least partially carried out either by an optical unit, requiring the presence on each wheel of at least one marker, or by a unit for measuring the angular displacement of each wheel and associated calculation unit; and calculating the number of occurred events N in accordance with the difference between the values counted or measured and in accordance with the number of teeth of the wheels.

Method for counting events occurring during a duration T and associated mechanical event counters

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Montfaucon, France

Pascal Girardin