Institut Polytechnique De Grenoble

Enerbee

Centre National De La Recherche Scientifique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Université Grenoble Alpes

Thibault Ricart

Jérôme Delamare

Jérome Delamare

Maxime Vincent

Jérémie Guillen

Bernard Viala

Orphée Cugat

Skandar Basrour

Nicolas Béraud

Luc Pouyadou

Guillaume Maj

Vivien Aumelas

Samuel Guilaume

Henri Paris

Jeremy Laville

Pascal Robert

Matthieu Museau

Samuel GuilaumÉ

Jérôme Laville

Romain Soulie

The method is for the discriminant monitoring of a composite multi-material assembly () having at least one internal layer () made of a first, electrically conductive composite material and a second layer () made of a second, electrically insulating composite material, the second layer () covering the first internal layer (). The method includes: —preparing the composite multi-material assembly () by exposing a portion () of the internal layer (), which constitutes a first electrode; —applying a second electrode () to the surface of the second layer (), one of these electrodes () being earthed; —performing discriminant monitoring wherein a current is generated between the first electrode () and the second electrode () by applying a threshold voltage Us predetermined by calibration to characterize a lack of structural defects, the appearance of a breakdown at a voltage lower than the threshold voltage Us being indicative of the presence of at least one structural defect in the composite assembly ().

Method for determining a deformation of an area of a part obtained by additive manufacturing

An autonomous device for measuring at least one characteristic of a fluid circulating in a conduit in a flow direction comprises a permanent magnetic field source, a magneto-electric converter and a processing circuit capable of using the electric charges supplied by the converter to supply a measurement of a characteristic of its environment. The source and the converter are placed in a stator and a rotor forming the device. The autonomous device further comprises attachment means allowing the stator to be fixedly placed in the conduit or at one end of the conduit, in a configuration in which the axis of rotation of the rotor is parallel to the flow direction. A control system may employ at least one such autonomous device.

Autonomous device for measuring the characteristics of a fluid circulating in a conduit and system for controlling ventilation, air conditioning and/or heating using such a device

A magneto-electric converter capable of converting a variation in magnetic field into a potential difference between two electrical terminals includes a support layer comprising two electrical terminals; a stack disposed on the support layer of a first layer made from a magnetostrictive material defining the reference plane and of a second layer made from a piezoelectric material having a polarization axis in the plane defined by the second layer, parallel to the reference plane; the second layer comprising electrodes; and a means for electrical connection of the electrodes to the electrical terminals.

Electricity generator comprising a magneto-electric converter and method of production

An electrical generator comprises a converter including two electrical terminals for converting a variation in a magnetic field into a potential difference between the terminals. The generator includes a stack of a first layer comprising an anisotropic magnetostrictive material defining a reference plane and a second layer comprising a piezoelectric material. The first layer has at least one preferential axis of deformation in the reference plane and the second layer has a polarization axis parallel to the reference plane, the preferential axis of deformation of the first layer being aligned to within 15&#xb0; with the polarization axis of the second layer. The generator includes a source that generates the magnetic field, the strength of which is insufficient to magnetically saturate the material of the first layer. The source and converter are able to rotate with respect to each other so as to vary the orientation of the magnetic field.

Generator of electricity comprising a magneto-electric converter and associated manufacturing process

A power generator including a converter with an electromechnical transducer and a magnetostrictive layer to convert a variation of a magnetic field into a mechanical deformation exerted on the transducer. There is a magnetic field source including a group of several permanent magnets. One of the group or the converter is movable, between first and second positions. The group has several first permanent magnets, one having an aspect ratio of between 1/10 and ten and most of the field lines that loop back do not pass through another first permanent magnet. The first permanent magnets are arranged such that the magnetic field induced inside the magnetostrictive material in the first position by one of the first permanent magnets is parallel to and in the direction opposite to the magnetic field induced at the same instant in the magnetostrictive material by the next first permanent.

Power generator

An energy harvester having a converter suitable for converting a variation of the energy to be harvested into a corresponding excess of electrical charges. There is a circuit for collecting the excess of electrical charges, the circuit is equipped with a controllable switch and a control device for the switch designed to control the switching of this switch to its closed position. The control device is suitable for exerting a force which stresses the electrical contacts towards one another. The force varies continually as a function of the quantity of electrical charges present on the first terminal and bringing the electrical contacts to bear on one another only when the excess of electrical charges exceeds a predetermined threshold, and/or for ionizing the electrically insulating medium to produce an electrical arc between the two electrical contacts only when the excess of electrical charges exceeds the predetermined threshold.

Energy harvester

Growing community of inventors

Seyssinet-Pariset, France

Thibault Ricart