US 12,437,165 B2
Safety system and method using a safety system
Hagen Feth, Waldkirch (DE); Andreas Sixt, Waldkirch (DE); Angelina Mueller, Waldkirch (DE); and Holger Waibel, Waldkirch (DE)
Assigned to SICK AG, Waldkirch (DE)
Filed by SICK AG, Waldkirch (DE)
Filed on Sep. 22, 2023, as Appl. No. 18/371,570.
Claims priority of application No. 102022129789.6 (DE), filed on Nov. 10, 2022.
Prior Publication US 2024/0160865 A1, May 16, 2024
Int. Cl. G06K 7/10 (2006.01); G06K 19/07 (2006.01); G07C 9/27 (2020.01)
CPC G06K 7/10009 (2013.01) [G06K 19/0723 (2013.01); G07C 9/27 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A safety system having an electronic access control system for a safety zone for objects, having at least one radio transponder and at least one radio station to recognize the radio transponder, and having at least one control and evaluation unit that is connected to the radio station to evaluate the read radio transponder information, and having at least one spatially bounded access zone having an access station,
wherein the safety zone is only accessible via the access zone so that the access zone can be passed through by the object before reaching the safety zone and after leaving the safety zone, with the access station being actuated when an object passes through the access zone;
wherein permitted objects have the radio transponder;
wherein the radio transponder has an identification by which the object can be identified;
wherein the permitted objects having the radio transponder can pass through the access zone;
wherein the control and evaluation unit is configured to read and to check the radio transponder by the radio station on the entry of the object into the safety zone in a first zone in the direction of movement in front of the access zone;
wherein the control and evaluation unit is configured to read and to check the radio transponder again in a second zone in the direction of movement after the access zone;
with a permitted passing through of the access zone and a permitted entry into the safety zone only being present when the radio transponder in the first zone and in the second zone has been read as valid by the radio station and has been checked by the control and evaluation unit;
with permitted objects being registered by the control and evaluation unit in the safety zone;
and with non-permitted objects not being registered by the control and evaluation unit in the safety zone;
and wherein in the event of detection of a non-permitted object in the safety zone or the detection of a permitted object in the safety zone operating in a non-permitted manner, the control and evaluation unit responds by causing at least one of a warning to take place, hazardous machines in the safety zone to operate in a non-hazardous manner, or change the operation of hazardous machines in the safety zone to stop or operate in a safe state.