Global Patent Index - EP 2769104 B1

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

EP 2769104 B1 20151104 (DE)

Application

EP 12780072 A 20120824

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

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