Device for monitoring a protection area

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Filing Information

  • Patent Number: EP1246148
  • Application Number: EP02002639
  • Filing date: 02/05/2002
  • Issue date: 11/16/2005
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  • U.S. Classifications: --
  • International Classifications: F16P 3/00 20060101C I20060722RMEP · F16P 3/14 20060101A I20060722RMEP · G08B 13/18 20060101C I20051008RMEP · G08B 13/184 20060101A I20051008RMEP ·
  • Foreign Priority: DE10114784 - 03/26/2001 ·
  • View document at: (opens new window):
    esp@cenet  ·  EPO  ·  Patent Family
1 Claims, No Drawings


Abstract

The current document has no english abstract.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4012635 Erwin Sick Optik-Electronik
US5008530 Erwin Sick GmbH Optik-Elektronik
US6075238 Ines-Elektronik-Systementwicklungs-Produktions GmbH
US6157040 Sick AG

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE19603267BOSCH GMBH ROBERT
DEB1228967

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7034929Sick AGRoland Bergbach et al.Apr 2006
US7557906Sick AGStefan MackJul 2009
EP1589355SICK AGRoland Bergbach et al.Mar 2007
EP1884804SICK AGMack, Dr. StefanMar 2009
US7448241DAVIES KEVIN SKevin S. DaviesNov 2008

Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
DE10114784SICK AGWUESTEFELD MARTIN et al.Oct 2002
EP1246148SICK AGMartin Wstefeld et al.Nov 2005
DE50204914SICK AGWUESTEFELD MARTIN et al.Dec 2005

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Independent Claims | See all claims (3)

  1. An apparatus for the monitoring of a protected field (S) comprising a spatially resolving light receiver (3); an optical imaging system (4) associated with the light receiver (3) for the focusing of received light; at least one reflector (1) arranged on the side of the protected field (S) remote from the optical imaging system (4); a memory for the storage of an image taken by the light receiver (3) with an object-free protected field (S); a comparator for the comparison of a currently taken image with an image stored in the memory; and a signal triggering device for the triggering of a signal if the currently taken image differs from the image stored in the memory at least in a pre-determined degree. characterised in that a light source (6) arranged outside the protected field (S) and/or on the side of the protected field (S) remote from the reflector (1) is provided; and in that furthermore a distance detection device is provided which computes the spacing between the light receiver (3) or the optical imaging system (4) and the reflector (1) from the spacing between two reference points of the reflector (1) imaged on the light receiver (3).