Soft Sensing - Advanced Control and Supervision of Mineral Processing Plants - page 198

Time [min]
Figure 4.19 Test of soft sensor 2 in 3 days of month 2 using parameters determined on a day of
month 1. Shown is the actual sensor measurement (black) and the soft sensor output (segmented)
Time [min]
Figure 4.20 Test of soft sensor 5 in 3 days of month 2 using parameters determined on a day of
month 2. Shown is the actual sensor measurement (black) and the soft sensor output (segmented)
But particle size sensors tend not to be highly available, so a back-up soft sen-
sor system for g 65 should be installed. Alternatively, a soft sensor for p 80 may be
designed that does not use g 65 as a secondary measurement (input). But no mea-
surements are available that may be used to estimate the feed f 80 .