Publications de François Barrot

The isostatic 3-body problem: a complete solution

Simon Nessim Henein, Florent Cosandier, Ilan Vardi, François Barrot, Johannes Richard Cornelis Geerit Kruis

Kinematic couplings are used when two rigid bodies need to be repeatedly and accurately positioned with respect to each other. They allow for sub-micron positioning repeatability by suppressing play and reducing strains in the bodies. Typical applications ...

2017

6 DOF repeatability measurement setup for measuring position of assembled silicon parts with nanometric resolution

Simon Nessim Henein, Florent Cosandier, François Barrot, Johannes Richard Cornelis Geerit Kruis, Pascal Gentsch

This article presents a test setup dedicated to the measurement of the 6 degrees of freedom relative positioning assembly repeatability of three micro-manufactured parts equivalent to those composing a mesoscale flexure-based robot. The typical size of the ...

2015

Méthode de libération d'une pièce micromécanique et pièce micromécanique comprenant des attaches sacrificielles

Simon Nessim Henein, François Barrot, Johannes Richard Cornelis Geerit Kruis, Rémy Fournier

A method for fabricating a micromechanical part from a substrate in which the part is fabricated by providing a plurality of fasteners between the part and the substrate, the fasteners being sacrificial, characterized in that the fasteners include at least ...

Organisation Mondiale de la Propriété Intellectuelle2013

Design and fabrication of a novel centimeter scale three dimensional silicon tip, tilt and piston mirror mechanism

François Barrot, Dara Zaman Bayat, Johannes Richard Cornelis Geerit Kruis, Rémy Fournier

A novel centimetre scale tip tilt piston mirror mechanism has been designed in silicon. The mirror consists of three identical mechanism parts and one mirror part. The fabrication of the parts was done with photolithography and Deep Reactive Ion Etching an ...

2013

Acceleration and inclination sensors based on magnetic levitation : application in the particular case of structural health monitoring in civil engineering

François Barrot

Some fields such as the Monitoring of Civil Engineering Structures, need very sensitive acceleration and inclination sensors with a high resolution at low accelerations (typically less than 1G) and moderate frequencies (typically less than 20 Hz) or very s ...

EPFL2008

Preliminary Investigations on a Diamagnetically Levitated Linear Conveyor

Hannes Bleuler, Roland Moser, Dominique Chapuis, François Barrot, Laurent Sache, Thomas Bosgiraud

Diamagnetic levitation is the only passive levitation at room temperature. It is interesting to use this principle for a contactless conveyor in applications where friction and wear-particle contamination should be avoided such as in a microfactory. Using ...

2006

Position Controlled Diamagnetic Linear Conveyor

Hannes Bleuler, Dominique Chapuis, François Barrot, Thomas Bosgiraud, Benjamin Burns

Magnetic levitation is an interesting concept in applications where friction and wear-particle contamination should be avoided. In this respect, a former study has shown that diamagnetic levitation, in conjunction with an electrodynamic impulse drive, is a ...

2006