EP 2769104 B1 20151104 - POSITION-MEASURING DEVICE FOR FLUID CYLINDER
Title (en)
POSITION-MEASURING DEVICE FOR FLUID CYLINDER
Title (de)
POSITIONSMESSVORRICHTUNG FÜR FLUIDZYLINDER
Title (fr)
DISPOSITIF DE MESURE DE POSITION POUR VÉRIN HYDRAULIQUE OU PNEUMATIQUE
Publication
Application
Priority
- AT 12192011 A 20110825
- AT 2012050118 W 20120824
Abstract (en)
[origin: WO2013026080A2] The invention relates to a position-measuring device (2) for a piston rod (6) leading out of a fluid cylinder (1), comprising a material measure in the form of an optically detectable code pattern (8) arranged at the outer circumference (7) of and along the piston rod (6) and a sensor arrangement (9) for optically detecting a rectangular measurement section (29) of the code pattern (8) arranged in a housing (12) in a fixed manner on the fluid cylinder (1), an illumination source (15) emitting a luminous flux onto the code pattern (8), an image sensor (16), measuring lenses (21) for transferring an image of the measurement section (29) onto the image sensor (16) and an evaluating unit (18) for determining the absolute position of the piston rod (6) using the image information captured by the image sensor (16). The illumination source (15) and the image sensor (16) are fastened to a common printed circuit board (17) of the sensor arrangement (9) and a light guiding element (22) for transferring the luminous flux from the illumination source (15) to the measurement section (29) is arranged between the illumination source (15) and the measurement section (29).
IPC 8 full level
F15B 15/28 (2006.01)
CPC (source: EP)
F15B 15/2846 (2013.01)
Citation (opposition)
Opponent : Timothy Webster
- US 8482607 B2 20130709 - WEBSTER TIMOTHY DAVID [CA], et al
- US 6834574 B2 20041228 - NEUMANN ULRICH W [US]
- US 6327791 B1 20011211 - NORCROSS RICHARD J [US], et al
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013026080 A2 20130228; WO 2013026080 A3 20130718; AT 511883 A1 20130315; AT 511883 B1 20130915; EP 2769104 A2 20140827; EP 2769104 B1 20151104; ES 2560407 T3 20160218
DOCDB simple family (application)
AT 2012050118 W 20120824; AT 12192011 A 20110825; EP 12780072 A 20120824; ES 12780072 T 20120824