US 2015/0316470 A1 · METHOD AND DEVICE FOR CHARACTERISING A FLUID MEDIUM USING A PHOTOELECTRIC TRANSDUCER

Abstract

A device for characterizing a fluid medium with the help of a photoelectric transducer comprises at least one semiconductor substrate possessing at least one space charge zone and presenting a reception surface for receiving the fluid medium in order to constitute an interface between the substrate and the fluid medium, a production system for producing a spot light beam that is amplitude-modulated and that lights at least one zone of the interface through the fluid medium, a measurement system for measuring values of a photoelectric magnitude delivered while performing the lighting so as to create a matrix of values of the photoelectric magnitude, and a processor system for processing values of the photoelectric magnitude delivered by the measurement system and adapted to use the matrix to determine an electronic signature characteristic of the fluid medium.

Claims17

Dependent claims

A method of characterizing a fluid medium (3) with the help of a photoelectric transducer (2) having at least one semiconductor substrate (4) possessing at least one space charge zone (5), the method being characterized in that it comprises the following steps:

making a reception surface (6) for receiving the fluid medium (3) on at least one face of the photoelectric transducer (2);
putting the fluid medium for characterizing into contact with the reception surface (6) so as to make an interface (7) between the substrate and the fluid medium;
lighting a plurality of zones of the interface (7) successively in time through the fluid medium (3) with the help of an amplitude-modulated light beam (9) in order to create photogenerated electric charges;
for each lighted zone of the interface (7), recovering the values of at least one photoelectric magnitude of value that depends on the lighting conditions and on the electronic properties of the interface (7) between the substrate and the fluid medium;
creating at least one- or two-dimensional matrix of values of the recovered photoelectric magnitude;
and
from the matrix that has been created of values of the photoelectric magnitude, determining an electronic signature that is characteristic of the fluid medium.

4 more elements

A device for characterizing a fluid medium (3) with the help of a photoelectric transducer (2), the device being characterized in that it comprises:

at least one semiconductor substrate (4) possessing at least one space charge zone (5) and presenting a reception surface (6) for receiving the fluid medium in order to constitute an interface (7) between the substrate and the fluid medium;
a production system (8) for producing a spot light beam (9) that is amplitude-modulated and that lights at least one zone of the interface (7) through the fluid medium (3);
a system for controlling the spot light beam so as to light a plurality of zones of the interface (7) in succession;
a measurement system (10) for measuring values of a photoelectric magnitude delivered while performing the lighting so as to create a one- or two-dimensional matrix of values of the photoelectric magnitude;
and
a processor system (12) for processing values of the photoelectric magnitude delivered by the measurement system (10) and adapted to store the values of the photoelectric magnitude for each of the lighted zone of the interface (7) and, on the basis of the matrix, to determine an electronic signature characteristic of the fluid medium.

3 more elements

Dependencies are inferred from the claim text.

Method and device for characterising a fluid medium using a photoelectric transducer

Life of this patent

Method and device for characterising a fluid medium using a photoelectric transducer

Life of this patent

Abstract

Claims17