The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2013
Filed:
Jun. 05, 2007
Applicant:
Esko Yli-koski, Kerava, FI;
Inventor:
Esko Yli-Koski, Kerava, FI;
Assignee:
Metso Automation Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system for controlling a flow control valve, comprising measuring a flow at a suitable point of a flow process and calculating a pressure drop across the valve from a Ccurve of the valve, a measured valve opening α, and the measured flow (Q). From this calculated pressure drop, a flow set point (Q), and an inverse Ccurve of the valve, a new valve opening (α) providing the desired flow is calculated. The control is thus adapted to each operating point and its prevailing flow gain and linearizes the dependence between flow control and flow.