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

Plastic Omnium Advanced Innovation and Research

Pierre-André Guitard

Claude Fermon

Myriam Pannetier-Lecoeur

Jean-Philippe Rolland

Yacouba Sanogo

Mamadou Saliou Balde

Nicolas Hubatzeck

Guénaëlle Jasmin-Lebras

It is proposed a method for determining a quantity of a liquid in a tank, the tank comprising: a first ultrasound subsystem capable of measuring level of liquid present above a predetermined threshold level within the tank; and at least one second ultrasound subsystem, said second ultrasound subsystem being associated with a sensing area within the tank and being configured to measure a parameter characteristic of the liquid, said sensing area being located below the predetermined threshold level. The method comprises in the steps of: &#x2014;checking the validity of the measurement performed by said first ultrasound subsystem (S); &#x2014;when it is detected that the measurement of said first ultrasound system is not valid: (a) checking (S) the validity of the measurement performed by said second ultrasound subsystem; (b) determining (S, S, S) a quantity of liquid, which quantity being based on a result of the validity check at step (a).

Method and system for determining a quantity of liquid in a tank

An NMR spectroscopy system for studying a region of a sample to be analysed, includes a magnetoresistive transducer made up of superposed planar layers, which receives a response signal of the sample; a system for making an AC current flow, at a supply frequency f, through the transducer; a system for generating a magnetic field Hthat is constant and uniform throughout a zone of interest in which the sample and transducer are placed; and an exciting coil to generate a magnetic field Hthat is uniform throughout the zone of interest and that varies at a resonant frequency f; the field His substantially perpendicular to the layers of the transducer. The system further includes a regulating system to ensure that the field Hand the planar layers remain orthogonal, and a system for detecting a signal of frequency f&#x2212;f, f&#x2212;for f+f.

NMR spectroscopy system

Growing community of inventors

Amilly, France

Pierre-André Guitard