Université De Franche Comte

Centre National De La Recherche Scientifique

Other

Ecole Nationale Superieure De Mecanique Et Des Microtechniques

Ecole National Superieure De Mecanique Et Des Microtechniques

Joël Agnus

David Heriban

Ronan Noizet

Ioan Alexandru Ivan

Manitrarivo Rakotondrabe

A micropositioning device for a piezoelectric actuator includes a means for controlling an electric field applied to the piezoelectric actuator so as to deform the piezoelectric material, and means for simultaneous measurement of a variation of electric charge accumulated on the piezoelectric actuator resulting from the deformation; and means for acquiring measurements of the variation of electric charge, for processing these acquisitions and for estimating a displacement (x, y, z) of the piezoelectric actuator and/or an applied force.

Micropositioning device with multidegrees of freedom for piezoelectric actuators and associated method

The present invention relates to a tool for a microtechnical gripper. The tool of the invention includes a tip having a support and first and second fingers disposed opposite one another in a chosen position. Each finger is connected to the support by a connecting element so as to be held in a rest position corresponding to the chosen position, the connecting element being flexible in order to allow the fingers to move with at least one degree of freedom relative to the support.

Tool for a microtechnical clip

A microtechnique device includes an actuator, designed to move movable equipment with a permanent magnet with respect to a support. The actuator is designed to move the movable equipment in two degrees of freedom from a position of rest, and the permanent magnet is chosen to have a magnetic field distribution that presents a main plane of symmetry and a main direction of magnetization passing through a center. The device includes a first magnetic sensor and a second magnetic sensor, these two being designed to detect a movement of the magnet. The sensors are positioned with respect to the position of rest of the magnet in a specific manner in the main plane of symmetry of the magnetic field and near to extrema. The first and second sensors are then sensitive to the movements of the movable equipment perpendicular to their respective working axes.

Device for measuring the positioning of a microactuator

Growing community of inventors

Auxon Dessous, France

Joël Agnus