Abstract:
A plurality of MEMS devices that can be easily configured to impart extended ranges of rotational and/or translational motion. The MEMS devices (3b) comprise a building block having a bendable member with a first end connected to a support structure, and a straight rigid member with a first end connected to the second end of the bendable member. The length of the rigid member is between one half to full length of the bendable member. The MEMS devices can be employed as actuators or sensors.
Abstract:
A piezoelectric / electrostrictive device (10A) comprises a pair of opposed thin plates (16a ,16b), a movable part (20), a fixed part (22) supporting the thin plates (16a, 16b) and the movable part (20), a piezoelectric / electrostrictive element (24a, 24b) attached to at least one of the thin plates (16a, 16b), and a hole (12) defined by both inner walls of the thin plates (16a, 16b), an inner wall (20a) of the movable part (20), and an inner wall (22a) of the fixed part (22). At least one beam (40) extends from the inner wall (20a) of the movable part (20) to the inner wall (22a) of the fixed part (22).
Abstract:
A parallel plate structure (1) is provided with a pair of bimorph piezoelectric elements (2) and prismatic insulation spacers (3) inserted between the piezoelectric elements (2) at the upper and lower ends thereof for cementing the piezoelectric elements (2) together via the spacers (3). Each piezoelectric element (2) comprises a planar base material (4) of titanium, PZT thin films (5) formed on both sides of the base material (4) by the hydrothermal method, and electrode films (6) formed on the PZT thin films (5). The base material (4) is 20 mu m thick and the PZT thin films (5) are several mu m thick, while the aluminum electrode films (6) are several mu m thick.
Abstract:
Une imprimante piézoélectrique comprend un bâti (90), une pluralité d'unités imprimantes (10) montées sur le bâti (90), chaque unité imprimante (10) comprenant un multilaminé piézoélectrique (24) comprenant au moins deux organes piézoélectriques (AF) et ayant une partie de montage (50) et une partie d'actionnement (52); la partie d'actionnement (52) est mobile dans une direction d'actionnement et dans une direction d'armement, le multilaminé (24) étant conique dans sa dimension latérale et étant plus grand au niveau de sa partie de montage (50) et plus petit dans sa partie d'actionnement (52); un poids (54) porté par le multilaminé (24) pour augmenter le transfert d'énergie du multilaminé, et un élément d'impression (14) entraîné par la partie d'actionnement (52); des moyens (80) d'application d'une tension d'armement (70, 74) et une tension d'actionnement (72, 76) sur les organes AF, lesquelles tensions sont inférieures à la tension de rupture dans le sens de polarisation et inférieures à la tension de dépolarisation dans le sens de dépolarisation, pour armer et actionner le multilaminé (24) et entraîner l'élément d'impression (14) vers la position d'impression (24a), et des moyens de guidage (16) fixés sur le bâti (90) pour guider les éléments d'impression (14); les unités imprimantes sont disposées en groupes de rangées empilées, qui peuvent se chevaucher et comprendre des trous (150) dans chacune des unités imprimantes inférieures (24r-2, r-3, s-2, s-3), pour recevoir des éléments d'impression (14r-1, r-2, s-1, s-2), à partir des unités d'impression supérieures (24r-1, r-2, s-1, s-2).
Abstract:
This invention provides an actuator which is easy to control the drive and has large generative force. The actuator is an actuator having a cylindrical outer frame body which expands in the side surface direction to bring the bottom portion and the top portion close to each other and a deformation unit which is accommodated in the outer frame body and has a plurality of deformation elements which are deformed by applying a voltage, in which, in the deformation unit, the plurality of deformation elements are mutually deformed when a voltage is applied to press and expand the outer frame body in the side surface direction.
Abstract:
The invention relates to a force generator (10a) for mounting on a structure (12) in order to introduce vibrational forces in a controlled manner into said structure for affecting vibrations, comprising at least one spring arm (14) on which a flexural arm (22) having an inertial mass (24) and extending in the direction toward the attaching point is fastened, and having at least one piezo transducer (26) at both ends (16, 18) of the spring arm (14), wherein the center of gravity of the inertial mass (24) is disposed in the region of the center of the spring arm (14). Alternatively, two guide springs are disposed on both sides of the spring arm (14) parallel thereto, in order to generate a vibrational motion, wherein the fastening point of the flexural arm (22) comprises an unchanged orientation during the vibrational motion.