Patent ID: 11921035
Assignee: MARATHON PETROLEUM COMPANY LP
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A spectroscopic analyzer assembly 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 spectroscopic analyzer assembly comprising:
a spectroscopic analyzer having a housing; and
an analyzer controller positioned at least partially with this housing and in communication with the spectroscopic analyzer, the analyzer controller configured to:
output, based at least in part on one or more signals received from the spectroscopic analyzer when in the first state during a 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 comprising 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 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 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 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;
analyze, when in the second state, a material received from a material source to output a material spectrum; and
transform, 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.