US 11,835,450 B2
Methods and assemblies 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. 16, 2022, as Appl. No. 17/988,187.
Application 17/988,187 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 2023/0080192 A1, Mar. 16, 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 method for determining and using 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 being defined as a period of time after a change to the spectroscopic analyzer, thereby to cause a need to calibrate or recalibrate the spectroscopic analyzer, the method comprising:
analyzing, via the spectroscopic analyzer when in the first state, a selected plurality of multi-component samples during a first-state time period, thereby to output first-state sample spectra;
determining one or more spectral models based at least in part on the first-state sample spectra and corresponding sample data;
analyzing, via the spectroscopic analyzer when in the first state, a selected one or more first-state portfolio samples, thereby to output a standardized analyzer spectra portfolio for the selected one or more first-state portfolio samples, the standardized analyzer spectra portfolio comprising a first-state portfolio sample spectrum for each of the first-state portfolio samples;
analyzing, via a spectroscopic analyzer when in the second state, a selected one or more second-state portfolio samples during a second-state time period, thereby to output second-state portfolio sample spectra for the 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;
comparing one or more of the second-state portfolio sample spectra for the selected one or more second-state portfolio samples to one or more of the first-state portfolio sample spectra of the standardized analyzer spectra portfolio corresponding to first-state portfolio samples of the spectroscopic analyzer as analyzed and output when in the first state during the first-state time period;
determining, based at least in part on the comparing, 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 plurality of wavelengths or over a range of wavelengths between the second-state portfolio sample spectra output by the spectroscopic analyzer when in the second state and the first-state portfolio sample spectra of the standardized analyzer spectra portfolio, thereby to reduce the variance between the second-state portfolio sample spectra and the first-state portfolio sample spectra;
analyzing, via the spectroscopic analyzer when in the second state, a material received from a material source, thereby to output a material spectrum; and
transforming, based at least in part on the standardized analyzer spectra portfolio, the material spectrum, thereby to output a corrected material spectrum for the material when in the second state, the corrected material spectrum including one or more of an absorption-corrected spectrum, a transmittance-corrected spectrum, a transflectance-corrected spectrum, a reflectance-corrected spectrum, or an intensity-corrected spectrum and defining a standardized spectrum.