Abstract:
The invention relates to a method for controlling a microelectromechanical system by means of an electrical control signal alternating between a maximum voltage value (Vmax) and a minimum voltage value (Vmin), wherein, during the transition from the maximum voltage value (Vmax) to the minimum voltage value (Vmin), the value of the voltage of the electrical control signal monotonously decreases from the maximum voltage value (Vmax) to the minimum voltage value (Vmin), which signal comprising, in sequential order:
a first slope between the maximum voltage value (Vmax) and a first voltage threshold value (Vend), a second slope, having a lower absolute value than the first slope, between the first voltage threshold value (Vend) and a second voltage threshold value (Vstart), and a third slope, having a higher absolute value than the second slope, between the second voltage threshold value (Vstart) and the minimum voltage value (Vmin).
Abstract:
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.
Abstract:
The invention relates to a microelectromechanical system comprising a support and an actuator, the actuator comprising a drive module comprising:
a fixed drive portion (210), mounted fixedly on the support, and comprising a fixed comb (211 with fingers (213), and a movable drive portion (220), mounted movably relative to the support, and comprising a movable comb (221) with fingers (223), a latching mechanism that is movable between an initial unlatched configuration and a final latched configuration,
wherein the movable comb (221) is arranged facing the fixed comb (211) so that when the latching mechanism is in the initial unlatched configuration, the fingers (223) of the movable comb (221) are not engaged between the fingers (213) of the fixed comb (211), and when the latching mechanism is in the final latched configuration, the fingers (223) of the movable comb (221) are engaged between the fingers (213) of the fixed comb (211) and the latching mechanism (500) prevent disengagement of the fingers (223) of the movable comb (221) from between the fingers (213) of the fixed comb (211).
Abstract:
The subject matter here is an actuation device (1) comprising an actuation element (3) including a fixed portion (31) and a driving portion (32); wherein the fixed portion (31) includes a crawling surface (311), the driving portion (32) includes a flexible moveable blade (321) positioned in parallel and at a distance from the crawling surface (311), and wherein, when a power supply voltage is applied between the moveable blade (321) and the crawling surface (311), the free end (3211) comes into contact with the crawling surface (311), and a contact area, between the moveable blade (321) and the crawling surface (311), increases by propagation of the crawling front (3213) along the moveable blade (321), the propagation of the crawling front displacing the moveable blade (321) according to a first orientation.
Abstract:
The present invention relates to a MEMS deformation sensor for measuring a relative movement between two regions of a structure, the sensor comprising: —a first portion (2) and a second portion (3) that are movable with respect to one another along a direction of measurement (X); —a thrust element (4) mounted fixed with respect to the first portion; —a first electrode (A) and a second electrode (B) that are capable of being raised to different electrical potentials, each mounted fixed with respect to the second portion; —a connecting portion (I) forming an electrical link between the first electrode and the second electrode, the thrust element applying a load to the connecting portion when the first portion moves with respect to the second portion along the direction of measurement beyond a predetermined distance, the electrical link being broken under the effect of the load.
Abstract:
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.
Abstract:
An actuation device (1) which includes an actuation element (3) with a fixed 10 portion (31) and a driving portion (32); wherein the fixed portion (31) includes a crawling surface (311). The driving portion (32) includes a flexible moveable blade (321) positioned in parallel and at a distance from the crawling surface (311). When a power supply voltage is applied between the moveable blade (321) and the crawling surface (311), the free end (3211) comes into contact with the crawling surface (311), and a contact area, between the moveable blade (321) and the crawling surface (311), increases by propagation of the crawling front (3213) along the moveable blade (321). The propagation of the crawling front displaces the moveable blade (321) according to a first orientation.
Abstract:
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.
Abstract:
The disclosed micro-sensor includes: a substrate including a first portion and a second portion; a third portion and fourth portion provided between the portions and connected to the first portion and the second portion respectively by an elastic member; detection and a counter including: a counting gear, a third beam capable of meshing with the gear, an amplifier for the value of a relative movement between the portions and including: a first beam attached at one end thereof to the third portion and at the other end thereof to a plate, a second beam attached at one end thereof to the fourth portion and at the other end thereof to the plate, the third beam being attached on one side to the plate and including a tooth capable of meshing with the gear.
Abstract:
The disclosed micro-sensor includes: a substrate including a first portion and a second portion; a third portion and fourth portion provided between the portions and connected to the first portion and the second portion respectively by an elastic member; detection and a counter including: a counting gear, a third beam capable of meshing with the gear, an amplifier for the value of a relative movement between the portions and including: a first beam attached at one end thereof to the third portion and at the other end thereof to a plate, a second beam attached at one end thereof to the fourth portion and at the other end thereof to the plate, the third beam being attached on one side to the plate and including a tooth capable of meshing with the gear.