Pascal Vouagner

AVNIR Energy / SONORHC Technologies

The detection and precise location of threats is a subject of prime importance in both the military and civilian fields. Although requiring a triggering event for detection, acoustic methods can help locate its origin. Conventional acoustics methods are generally very effective in a free or open field, because the acoustic waves generated by a shot...

Fast and accurate fault diagnosis is important to ensure the reliability and the operation safety of rotating machinery, which is often based on vibration analysis. In this paper, a novel approach combining Convolutional Neural Networks (CNN) and a Support Vector Machine (SVM) classifier is proposed, in order not only to leverage upon the advantage...

Nonlinear material response is analysed with the Fourier transform (FT) of the raw signal measured by a high-frequency dynamic mechanical analyzer (HF DMA). It is known from rheological behaviour of elastomers that reinforcing fillers additionally induce nonlinearity in an already inherently nonlinear system. This behaviour is often described in te...

Integrity management of assets has become a major issue for oil & gas contractors. Despite regular inspections and numerous safety procedures, failure events are still regularly reported from fields. Consequences are generally limited however; the risk of catastrophic events is still high whereas new systems could be easily put in place for reasona...

This paper presents the noise and vibration methodologies applied at the FEED and EPC phases, in order to ensure that plant design meets the noise and vibration requirements of an Oil and Gas project. Working areas, but also the quiet areas such as living quarters or technical rooms are adressed. More specifically, the following steps / actions are...

High- or medium-voltage equipment comprising an induction-activated portion, a tank surrounding the active portion and filled with a dielectric fluid, such as oil, and passive acoustic reduction means for reducing acoustic waves coming from the active portion and propagating in the dielectric fluid. According to the invention, the passive means cre...

The need for instrumentation able to monitor internal parameters inside reactor vessels during plant operation is getting stronger. Internal mechanical structures important for safety are concerned: for example core support plate, fuel assemblies or primary pumps. Because of very harsh environmental conditions (high temperature, pressure and radiat...