Snecma

Safran Electronics & Defense

Snecma Moteurs

Alain Martinez

Yann Philippe Jaslier

Claude Turrini

Giao-Minh Nguyen

Bertrand Bouillot

Guillaume Oberlaender

Veronique Zerrouki

Marie-Christine Ntsama Etoundi

Patrick Gilbert Petit

Alain Keller

Romain Rene Marcel Chardonnet

Daniel Langeard

Romain René Marcel Chardonnet

Véronique Zerrouki

A light pulse detection circuit for connection to a photodiode, the detection circuit comprising an integration capacitor, discharge means, and comparator means adapted to compare an integration voltage across the terminals of the integration capacitor with a reference voltage threshold in order to produce a light pulse detection signal. The reference voltage threshold is a self-adaptive threshold depending on a level of light background noise. A detection device comprising a photodiode and such a detection circuit. A detection matrix comprising a plurality of such detection devices.

Circuit for detecting light pulses

Laser spot detecting device including a plurality of elementary optoelectronic detectors that are each connected to an elementary pulse detecting circuit, each elementary pulse detecting circuit including a comparator and a memory module that is connected to one output of the comparator, the memory modules being connected to a multiplexing circuit having an output forming a digital spatial output of the laser spot detecting device. The laser spot detecting device further more includes a global OR circuit having inputs connected to the outputs of the comparators and having an output forming a real-time digital temporal output of the laser spot detecting device. Method for detecting a laser spot implemented by such a detecting device.

Device for detecting a laser spot

A method and tooling for assembling a guide vane stage that includes an inner shroud and an outer shroud that are coaxial and interconnected by radial airfoils, the method including holding plates pressed against an outer surface of the inner shroud so that the plates cover gaps formed between openings in the inner shroud and the airfoils at least in part and in a manner that is leaktight, and applying a sealing resin to the inner surface of the inner shroud so that the resin fills the gaps and so that radially inner ends of the airfoils are embedded in the resin.

Method and tooling for assembling a guide vane stage

A ceramic drill bit comprising a cylindrical shank and a shaped portion extending axially in line with the shank and having a free end forming the tip of the bit, a relief face extending from each main cutting edge with a relief angle lying in the range 4&#xb0; to 10&#xb0; approximately relative to a plane perpendicular to the axis of rotation of the bit, and two notches forming two secondary cutting faces extending from the central edge with positive cutting angles lying in the range 1&#xb0; to 7&#xb0; approximately relative to the axis of rotation of the bit.

Ceramic bit for high speed drilling

The present invention pertains to an automated polishing process for semi-finished mechanical parts in titanium or titanium alloy, using a machine with abrasive belt mounted on a tangential contact wheel driven in rotation at a determined speed and applied at a determined pressure, the wheel travelling with respect to the part's surface at a determined rate, characterized by the fact that the abrasive belt consists of superabrasive grains in industrial diamond or cubic boron nitride. The process is applied to geometric conforming of jet engine fan or compressor blades.

Automated polishing process for mechanical parts in titanium or titanium alloy

The reactive element is introduced to the surface of the metal substrate in the form of an oxide powder and the aluminide-type coating is then formed.

Growing community of inventors

Boulogne Billancourt, France

Alain Martinez