US 12,246,120 B2
Device for the measurement of carbon dioxide in a working gas
Nicola Ghelli, Medolla (IT); Paolo Fontanili, Medolla (IT); Marco Corbelli, Medolla (IT); Michele Bellancini, Medolla (IT); and Guido Comai, Medolla (IT)
Assigned to EUROSETS S.R.L., Medolla (IT)
Appl. No. 17/053,921
Filed by EUROSETS S.R.L., Medolla (IT)
PCT Filed May 22, 2019, PCT No. PCT/IB2019/054221
§ 371(c)(1), (2) Date Nov. 9, 2020,
PCT Pub. No. WO2019/224735, PCT Pub. Date Nov. 28, 2019.
Claims priority of application No. 102018000005692 (IT), filed on May 24, 2018.
Prior Publication US 2021/0236707 A1, Aug. 5, 2021
Int. Cl. A61M 1/16 (2006.01); A61M 1/36 (2006.01)
CPC A61M 1/1698 (2013.01) [A61M 1/3624 (2013.01); A61M 2202/0225 (2013.01); A61M 2205/3306 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/36 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for measurement of carbon dioxide in a working gas, the device comprising:
a tubular body inside which the working gas is conveyed;
at least one emitter of an optical signal arranged at said tubular body;
at least one receiver of said optical signal arranged at said tubular body on a side of said emitter;
heating means located to be arranged either at said at least one emitter or at said at least one receiver;
at least one temperature sensor positioned in a proximity of said heating means; and
at least one control unit operatively connected to said at least one emitter, to said at least one receiver, to said heating means and to said at least one temperature sensor, wherein
said at least one control unit comprising correction means which are configured to correct a value of the optical signal detected by said at least one receiver based on a temperature measured by said at least one temperature sensor, and
said correction means comprise first means for calculating a filtered optical signal (Sf), corresponding to the average of the signals received by said at least one receiver in a first dynamic time range, second means for calculating a filtered temperature (Tf), corresponding to the average temperature measured by said at least one temperature sensor in a second dynamic time range, and third means for calculating a corrected optical signal (Sc) according to the following formula:
Sc=Sf+(Tr−Tf)×C
where Sf corresponds to said filtered optical signal, Tr corresponds to a pre-settable reference temperature, Tf corresponds to said filtered temperature and C corresponds to a pre-settable coefficient.