Nanotec Solution

Fr&eacute;d&eacute;ric Ossart

Patrick Leteurtre

A device for determining the characteristics of a biomass, includes: a probe (S,S&prime;) including electrodes, two or four in number, for injecting a current into a medium containing biological cells and for reading the voltage applied to the medium, and a resistance for measuring the injected current; a conditioning unit ( ) including an alternating voltage generator ( ) and a circuit ( ) processing current and voltage measuring signals, so as to deliver signals (C,G) respectively of measurement of the capacity and conductance of the medium. The conditioning unit ( ) includes a zero method measuring bridge ( ) automatically controlled to deliver the signals (C,G) of measurement of the medium capacity and conductance. The invention is useful for characterizing media containing biological cells, in particular for controlling biological fermentation process.

Device and method for determining characteristic of a biomass

A method for measuring axial deviation in a taut-wire alignment system (,) that includes a dynamically grounded resistive wire (,) extending along a longitudinal reference axis and adjacent to elements to be aligned (,). The method comprises applying an AC voltage signal to a measurement electrode provided with a reference electrode, the measurement electrode being arranged in a measurement plane in a holder attached to an element to be aligned (,); carrying out a measurement using a capacitive bridge that includes a first capacitor consisting of the measurement electrode and the wire, as well as a second capacitor, in order to provide a measurement signal representing an axial position of the measurement electrode relative to the taut wire (,) ; and processing the measurement signal to provide data indicating the axial deviation between the element to be aligned (,) and a predetermined alignment position. The method is particularly suitable for aligning elements in linear colliders.

Growing community of inventors

Nimes, France

Frédéric Ossart

Growing community of inventors

Nimes, France

Fr&eacute;d&eacute;ric Ossart

Frédéric Ossart