公开(公告)号：US20240264077A1

公开(公告)日：2024-08-08

申请号：US18567571

申请日：2022-06-10

Applicant: Senseair AB

Inventor： Cheng Yang ,  Tobias Oechtering ,  You Yang

IPC: G01N21/3504 ,  G01N21/27

CPC classification number: G01N21/3504 ,  G01N21/274 ,  G01N2201/12784

Abstract: A computer implemented method and a gas sensor device comprising a spectroscopic sensing unit (2), a memory (3) and a control unit (4), is described. The control unit (4) is configured to output calibrated values, which are measures of a concentration of a gas component measured by the spectroscopic sensing unit (2), wherein the calibrated values are determined from measurement values obtained from the spectroscopic sensing unit (2) and a baseline calibration parameter retrieved from the memory (3). The control unit is configured to update the baseline calibration parameter (zero) by identifying the minimum measurement value obtained during a predetermined first time period (14), obtaining a time for the first time period (14), obtaining a model value corresponding to the obtained time, determining an updated baseline calibration parameter based on the minimum measurement value and the model value, and updating the baseline calibration parameter stored in the memory (3).

公开(公告)号：US12140536B2

公开(公告)日：2024-11-12

申请号：US18022950

申请日：2021-08-30

Applicant: Senseair AB

Inventor： Yang You ,  Tobias Oechtering ,  Henrik Rödjegård

IPC: G01N21/3504

Abstract: A method for determining a measure of a gas concentration from a group of at least two non-dispersive infrared. NDIR. gas sensors (S1-SN) is described. The method comprises the steps of obtaining. at a processing unit (1), from each NDIR gas sensor (S1-SN) a measure of a gas concentration as a belief function Pi(x), which provides a probability as a function of the sensed light intensity at a specific wavelength, merging. in the processing unit, the belief functions Pi(x) to a merged belief function P(x). A computer program performing the method is also described.