EP 2310611 A1 20110420 - METHOD FOR DETERMINING DEAD ZONE OF VALVE
Title (en)
METHOD FOR DETERMINING DEAD ZONE OF VALVE
Title (de)
VERFAHREN ZUR BESTIMMUNG DER TOTZONE EINES VENTILS
Title (fr)
PROCÉDÉ DE DÉTERMINATION DE ZONE MORTE DE SOUPAPE
Publication
Application
Priority
- FI 2009050379 W 20090511
- FI 20085445 A 20080513
Abstract (en)
[origin: WO2009138558A1] The invention relates to a method for determining the dead zone of a proportional control valve (8) used for controlling an actuator of a rock drilling device, the method comprising controlling the control valve (8) with an electric P controller (12) and measuring the position of the actuator in a coordinate system representing its movement with a separate position detector. The dead zone is determined by means of a product of the P controller of the control valve (8) and the difference value.
IPC 8 full level
E21B 7/02 (2006.01); E21B 44/00 (2006.01); F15B 13/044 (2006.01); F15B 19/00 (2006.01)
CPC (source: EP FI)
E21B 7/022 (2013.01 - FI); E21B 44/00 (2013.01 - FI); F15B 13/044 (2013.01 - FI); F15B 19/002 (2013.01 - EP FI)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
WO 2009138558 A1 20091119; AU 2009247995 A1 20091119; AU 2009247995 B2 20111222; CA 2723610 A1 20091119; CA 2723610 C 20130716; CN 102027185 A 20110420; CN 102027185 B 20130918; EP 2310611 A1 20110420; EP 2310611 A4 20140326; FI 120918 B 20100430; FI 20085445 A0 20080513; FI 20085445 A 20091114; JP 2011522174 A 20110728; JP 5319759 B2 20131016
DOCDB simple family (application)
FI 2009050379 W 20090511; AU 2009247995 A 20090511; CA 2723610 A 20090511; CN 200980117368 A 20090511; EP 09745883 A 20090511; FI 20085445 A 20080513; JP 2011508960 A 20090511