US 12,188,820 B2
Rolling principal component analysis for dynamic process monitoring and end point detection
Lan Sun, Santa Rosa, CA (US); Chang Meng Hsiung, Redwood City, CA (US); and Edward Gooding, San Jose, CA (US)
Assigned to VIAVI Solutions Inc., Chandler, AZ (US)
Filed by VIAVI Solutions Inc., Chandler, AZ (US)
Filed on Feb. 1, 2024, as Appl. No. 18/429,532.
Application 18/429,532 is a continuation of application No. 17/805,099, filed on Jun. 2, 2022, granted, now 11,920,980.
Claims priority of provisional application 63/267,383, filed on Jan. 31, 2022.
Prior Publication US 2024/0167872 A1, May 23, 2024
Int. Cl. G01J 3/28 (2006.01)
CPC G01J 3/28 (2013.01) [G01J 2003/2836 (2013.01); G01J 2003/284 (2013.01); G01J 2003/2886 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by one or more devices, spectroscopic data during a performance of a blending process;
projecting, by the one or more devices and based on a first block of spectra from the spectroscopic data, a second block of spectra from the spectroscopic data,
where the first block of spectra includes spectra collected during one or more revolutions of a blender performing the blending process;
determining, by the one or more devices and based on projecting the second block of spectra, whether the blending process has reached a steady state,
where the steady state indicates that blending has been achieved; and
one or more of:
causing, by the one or more devices and based on whether the blending process has reached the steady state, the blender to stop the blending process or restart the blending process on new materials,
causing, by the one or more devices and based on whether the blending process has reached the steady state, a next step of a manufacturing process to be initiated,
providing, by the one or more devices, an indication of whether the blending process has reached the steady state, or
enabling visualization of an evolution of the blending process.