US 11,906,423 B2
Methods, assemblies, and controllers for determining and using standardized spectral responses for calibration of spectroscopic analyzers
Roy Roger Bledsoe, Jr., Findlay, OH (US); Lance T. Campbell, Findlay, OH (US); Randy N. Ridge, Findlay, OH (US); and Brian K. Wilt, Findlay, OH (US)
Assigned to MARATHON PETROLEUM COMPANY LP, Findlay, OH (US)
Filed by MARATHON PETROLEUM COMPANY LP, Findlay, OH (US)
Filed on Nov. 23, 2022, as Appl. No. 17/993,691.
Application 17/993,691 is a continuation of application No. 17/988,210, filed on Nov. 16, 2022.
Application 17/988,210 is a continuation of application No. 17/988,187, filed on Nov. 16, 2022.
Application 17/988,187 is a continuation of application No. 17/988,239, filed on Nov. 16, 2022.
Application 17/988,239 is a continuation of application No. 17/652,431, filed on Feb. 24, 2022.
Application 17/988,187 is a continuation of application No. 17/652,431, filed on Feb. 24, 2022.
Application 17/988,210 is a continuation of application No. 17/652,431, filed on Feb. 24, 2022.
Claims priority of provisional application 63/268,456, filed on Feb. 24, 2022.
Claims priority of provisional application 63/153,452, filed on Feb. 25, 2021.
Prior Publication US 2023/0089935 A1, Mar. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/31 (2006.01); G01J 3/28 (2006.01)
CPC G01N 21/31 (2013.01) [G01J 3/28 (2013.01); G01J 2003/2866 (2013.01); G01N 2201/127 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A spectroscopic analyzer controller to determine and use standardized analyzer spectral responses to enhance a process for calibration of a spectroscopic analyzer when a spectroscopic analyzer changes from a first state to a second state, the second state occurring after a period of time from the first state during which a change causes a need to calibrate or recalibrate the spectroscopic analyzer, the spectroscopic analyzer controller being configured to:
receive one or more signals from a spectroscopic analyzer, the spectroscopic analyzer being in the first state during a first-state time period;
output, based at least in part on the one or more signals received from the spectroscopic analyzer, first-state sample spectra for each of a selected plurality of multi-component samples;
determine one or more spectral models based at least in part on the first-state sample spectra and corresponding sample data;
output, based at least in part on one or more signals received from the spectroscopic analyzer when in the first state, a standardized analyzer spectra portfolio for a selected one or more first-state portfolio samples, the standardized analyzer spectra portfolio including a first-state portfolio sample spectrum for each of the first-state portfolio samples;
output, based at least in part on one or more signals received from the spectroscopic analyzer when in the second state during a second-state time period, a second-state portfolio spectrum for each of a selected one or more second-state portfolio samples, each of the second-state portfolio sample spectra being associated with a corresponding second-state portfolio sample, the multi-component samples including a greater number of samples than a number of samples included in the second-state portfolio samples, and the second-state time period for analyzing the second-state portfolio samples being less than the first-state time period;
compare one or more of the second-state portfolio sample spectra for the selected one or more second-state portfolio samples to a set of first-state sample spectra of a selected plurality of corresponding first-state portfolio samples of the spectroscopic analyzer as analyzed and output when in the first state during the first-state time period, each of the first-state portfolio sample spectra being associated with a corresponding first-state portfolio sample;
determine, based at least in part on the compare, for the one or more of the selected one or more second-state portfolio samples of the second-state portfolio sample spectra, a variance, at one or more of (a) a plurality of wavelengths or (b) over a range of wavelengths, between the first-state portfolio sample spectra of the standardized analyzer spectra portfolio and the second-state portfolio sample spectra output by the spectroscopic analyzer when in the second state;
reduce the variance based at least in part on the standardized analyzer spectra portfolio;
receive one or more signals from the spectroscopic analyzer indicative of a material received from a material source;
analyze, when in the second state, the one or more signals from received from the spectroscopic analyzer indicative of the material received from the material source;
output a material spectrum indicative of the material received from the material source; and
transform, based at least in part on the standardized analyzer spectra portfolio, the material spectrum to output a corrected material spectrum for the material when in the second state, the corrected material spectrum including one or more of (a) an absorption-corrected spectrum, (b) a transmittance-corrected spectrum, (c) a transflectance-corrected spectrum, (d) a reflectance-corrected spectrum, or (e) an intensity-corrected spectrum, thereby to define a standardized spectrum.