US 12,449,062 B2
Methods and apparatus to analyze valve characteristics
Shannon Jelken, Marshalltown, IA (US); John Fuller, Marshalltown, IA (US); Bret Dahme, Tama, IA (US); and Aaron Shelly, Mount Healthy, OH (US)
Assigned to Fisher Controls International LLC, Marshalltown, IA (US)
Filed by Fisher Controls International LLC, Marshalltown, IA (US)
Filed on Nov. 17, 2022, as Appl. No. 18/056,451.
Prior Publication US 2024/0167583 A1, May 23, 2024
Int. Cl. G06F 11/30 (2006.01); F16K 37/00 (2006.01)
CPC F16K 37/0083 (2013.01) 21 Claims
OG exemplary drawing
 
1. An apparatus to determine at least one characteristic of a valve, the apparatus comprising:
machine readable instructions; and
programmable circuitry to execute the machine readable instructions to:
partition a valve stroke curve of the valve to define bins thereof, the valve stroke curve corresponding to stroke data of the valve,
filter data points associated with a seat contact portion of the valve stroke curve,
fit curves of the bins to define separate fitted curves based on the filtered data points, wherein ones of the fitted curves correspond to ones of the respective bins,
characterize a seat contact of the valve based on the separate fitted curves, and
adjust operation of the valve based on the characterized seat contact.