US 11,860,035 B2
Blending process end point detection
Chang Meng Hsiung, Redwood City, CA (US); Lan Sun, Santa Rosa, CA (US); and Michael Klimek, Santa Rosa, CA (US)
Assigned to VIAVI Solutions Inc., Chandler, AZ (US)
Filed by VIAVI Solutions Inc., San Jose, CA (US)
Filed on Dec. 27, 2021, as Appl. No. 17/646,038.
Prior Publication US 2023/0204417 A1, Jun. 29, 2023
Int. Cl. G01J 3/02 (2006.01); G01J 3/28 (2006.01)
CPC G01J 3/0275 (2013.01) [G01J 2003/2833 (2013.01); G01J 2003/2836 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a device, spectroscopic data associated with a blending process;
identifying, by the device, a pseudo steady state end point based on the spectroscopic data, the pseudo steady state end point indicating an end of a pseudo steady state associated with the blending process;
identifying, by the device, a reference block and a test block from the spectroscopic data based on the pseudo steady state end point;
generating, by the device, a raw detection signal associated with the reference block and a raw detection signal associated with the test block;
generating, by the device, a statistical detection signal based on the raw detection signal associated with the reference block and the raw detection signal associated with the test block; and
determining, by the device, whether the blending process has reached a steady state based on the statistical detection signal.