Patent ID: 11906423
Assignee: MARATHON PETROLEUM COMPANY LP
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. 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 when in the first state during a first-state time period;
output, based at least in part on one or more signals received from the spectroscopic analyzer when in the first state during the first-state time period, 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, the material including one of a feed to a material processing unit or a product of a material processing unit;
analyze, when in the second state, the one or more signals received from the spectroscopic analyzer indicative of the material received from the material source;
output a material spectrum, based at least in part on the one or more signals received from the spectroscopic analyzer indicative of the material received from the material source;
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;
predict, based at least in part on the corrected material spectrum, material data associated with the material; and
control, based at least in part on the predicted material data, the material processing unit.