US 12,287,282 B2
Method for recalibrating an electronic nose
Cyril Herrier, Grenoble (FR); David Harbine, Grenoble (FR); and Yanis Caritu, Grenoble (FR)
Assigned to ARYBALLE, Grenoble (FR)
Appl. No. 17/758,291
Filed by ARYBALLE, Grenoble (FR)
PCT Filed Dec. 28, 2020, PCT No. PCT/EP2020/087942
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2021/136761, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 1915729 (FR), filed on Dec. 30, 2019.
Prior Publication US 2023/0031220 A1, Feb. 2, 2023
Int. Cl. G01N 21/27 (2006.01); G01N 21/552 (2014.01); G01N 21/78 (2006.01)
CPC G01N 21/274 (2013.01) [G01N 21/553 (2013.01); G01N 21/783 (2013.01); G01N 2201/1214 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for recalibrating an electronic nose suitable for characterizing target compounds present in a gas sample introduced into a measurement chamber, the measurement chamber comprising at least one sensitive site having receptors with which the target compounds are able to interact via adsorption/desorption, the electronic nose comprising a processing unit in which is pre-stored a first correction function expressing a variation in a parameter representative of a measurement signal associated with a reference gas as a function of a relative humidity, the method comprising:
successively injecting, into the measurement chamber, reference gases not containing target compounds, the reference gases injected one after the other and having various predetermined non-zero values of relative humidity, wherein successively injecting the reference gases comprises an injection of a given reference gas, the given reference gas being drawn from a reservoir in which the given reference gas has an initial relative-humidity value and passing, before the given reference gas reaches the measurement chamber, through a reservoir partially filled with a hydrophilic liquid, so that the given reference gas introduced into the measurement chamber has a relative humidity that decreases from the initial relative-humidity value to a final value through an intermediate value;
determining, in the course of each injection, a measurement signal representative of the interactions of the receptors with the reference gas present, at various measurement times, in response to an excitation signal transmitted to the sensitive site, then determining, for each reference gas, a baseline representative of the determined measurement signal, the baseline being associated with the relative humidity of the reference gas present; and
determining a second correction function expressing a variation in a parameter representative of the measurement signal associated with the reference gas as a function of relative humidity, on the basis of the determined baselines and of the predetermined values of relative humidity, the second correction function then being stored in the processing unit instead of the first correction function.