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

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Charles Hudin

Moustapha Hafez

Christian Bolzmacher

Vincent Hayward

José Lozada

Michaël Wiertlewski

Harald Zophoniasson

Steven Strachan

Pierre-Henri Orefice

Ayoub Ben Dhiab

Lucie Pantera

Sabrina PANËELS

A device for local friction modulation via vibration includes a vibrating interface with a contact surface, a plurality of actuators with active surfaces that are arranged against this vibrating interface, designed to vibrate the vibrating interface in a transverse direction through the transmission of mechanical bending waves to create at least one local friction modulation on the contact surface, and a generator which generates a plurality of control signals for controlling the actuators. Each control signal comprises a carrier signal at a non-radiating frequency for the actuator that it controls. At least two of the actuators share an overlapping common portion of their active surfaces.

Device for localized friction modulation via vibrations in a vibrating interface with a contact surface

A contactless detection device, comprising a detection surface; a plurality of actuators acoustically coupled to the detection surface; an ultrasonic acoustic wave detector; an electronic and/or IT computer, the device being configured to detect one or more element(s) by repeating the following steps: focusing ultrasonic acoustic waves emitted by the actuators into a focusing region, obtained from waves emitted by the actuators and to which a first time reversal method has been applied, and measuring a duration between emitting the waves and receiving an echo of these waves by the detector, wherein the computer is configured to calculate the control signals such that the detection waves are focused successively into focusing regions of different shape and/or sizes.

Contactless element detection device

A tactile stimulation interface includes a surface which the user explores by touch with the fingers, an actuator for applying a force to the surface, and a controller for controlling the actuator. The controller sends the actuator signals corresponding to the forces to be applied to the surface according to the tactile stimulation to be generated on the surface, the forces being determined by a time reversal method. The controller is configured such that, for at least one given tactile pattern, the actuator is controlled such as to generate pulses, in at least one area of the surface, by focusing at least one acoustic wave at a point. The location of the point on the surface varies over time, such as to provide tactile stimulation for the finger according to the given tactile pattern.

Tactile stimulation interface using time reversal and providing enhanced sensations

The invention relates to a haptic interface comprising a substrate (), a plate () comprising a surface () for interaction with one or more fingers of a user, and actuators (A) capable of applying a vibration to said plate (), and a control module (MC) for controlling said actuator,—said plate () being in the shape of a strip extending along a first direction (X) and delimited transversely to the first direction by two lateral edges (), said lateral edges () being supported by said substrate (),—said control module (MC) being configured to generate control signals to said actuator (A) at first frequencies lower than the cut-off frequency of the first propagation mode of said plate, so that the actuator (A) generates evanescent waves in the plate ().

Touch interface offering improved localised vibrotactile feedback

Tactile interface comprising a panel () having an interactive surface () with one or a plurality of exterior elements, comprising a plurality of interactive areas (Z, Z, Z, Z) arranged relative to one another, such that they cover substantially the whole of the interactive surface () and a plurality of actuators (A, A, A, A) in contact with the panel, control means () of actuators configured to send control signals to the actuators, comprising means for calculating () said control signals, said calculating means () executing an inverse filtering operation, so as to emit, from a desired displacement or displacements of one or more interactive areas (Z, Z, Z, Z), control signals compensating at least partially the distortion, reverberation and propagation of waves.

Areal device offering improved localized deformation

A tactile stimulation interface comprising a surface explored by touch by means of a finger of a user, actuators applying forces on said surface, and control means of the actuators, said control means sending, to the actuators, signals corresponding to the forces to be applied to said surface, the forces being determined by a time reversal method, means for detecting the contact of the finger with the surface and for monitoring the movement of the finger on the surface. The control means are capable, in order to produce an acoustic lubrication effect in at least one given area of the surface, of generating a signal formed from a convolution of a pulsed response returned by a continuous function representative of the acoustic lubrication effect.

Time reversal interface generating an acoustic lubrication

A touch interface comprising a first surface and n actuators designed to vibrate said first surface, n being an integer &#x3e;1. A control unit is able to generate a control signal for each actuator, each control signal being a harmonic signal comprising a carrier signal at a non-radiative frequency.

Interface providing localised friction modulation by acoustic lubrication

A system for detecting an application of pressure on a surface of an object, comprising a support of the object equipped with at least one sensor of force and of torque, and a processing unit configured to calculate, on the basis of the measurements of the at least one force and torque sensor, the coordinates of a straight line in space passing through a point of application of pressure on the surface of the object. The processing unit determines, by use of a ray-tracing calculation, whether an elementary facet of a geometric model of the surface of the object representing the surface according to a mesh of elementary facets intercepts the straight line passing through the point of application of pressure.

System and method for detecting an application of pressure at the surface of an object by force measurement

Tactile stimulation interface comprising a support (), a flexible surface suspended on the support () intended to be tactilely explored by an operator, actuators () intended to apply a force on the flexible surface () and means for controlling the actuators (), the actuators being located on the contour of the flexible surface. The control means are intended to send, to the actuators (), signals corresponding to the forces to be applied to the flexible surface () according to the tactile stimulation to be generated on the flexible surface (), the forces being determined by a time-reversal method. The surface () comprises at least one sufficiently flexible area, for example of Mylar&#xae;, in order for the propagation speed of the waves thus generated to be slow enough to reach sufficiently short wavelengths at low frequencies, thereby substantially improving focusing at resolutions compatible with tactile stimulation.

Growing community of inventors

Paris, France

Charles Hudin