US 11,796,713 B2
Device and method for optically surveilling at least one area
Robert Send, Karlsruhe (DE); Celal Mohan Oeguen, Ludwigshafen (DE); and Ingmar Bruder, Ludwigshafen (DE)
Assigned to TRINAMIX GMBH, Ludwigshafen am Rhein (DE)
Appl. No. 17/263,977
Filed by trinamiX GmbH, Ludwigshafen am Rhein (DE)
PCT Filed Aug. 6, 2019, PCT No. PCT/EP2019/071132
§ 371(c)(1), (2) Date Jan. 28, 2021,
PCT Pub. No. WO2020/030646, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 18187676 (EP), filed on Aug. 7, 2018.
Prior Publication US 2021/0302617 A1, Sep. 30, 2021
Int. Cl. G01V 8/22 (2006.01); F16P 3/14 (2006.01)
CPC G01V 8/22 (2013.01) [F16P 3/144 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device (110) for optically surveilling at least one area (112), the device (110) comprising a sender unit (114) and a receiver unit (116),
wherein the sender unit (114) has at least one illumination source (118), wherein the illumination source (118) is designed to generate at least one light beam (122) having a beam profile, wherein each light beam (122) is designated for propagating to the receiver unit (116), thereby traversing at least one area for surveillance (124);
wherein the receiver unit (116) comprises:
at least one transfer device (134), wherein the transfer device (134) has at least one focal length in response to the at least one incident light beam (122) propagating from the illumination source (118) to at least two optical sensors (138), wherein the transfer device (134) has an optical axis (136), wherein the transfer device (134) constitutes a coordinate system, wherein a longitudinal coordinate 1 is a coordinate along the optical axis and wherein d is a spatial offset from the optical axis (136);
the at least two optical sensors (138), wherein each of the at least two optical sensors (138) has at least one light sensitive area (140), wherein each optical sensor (138) is designed to generate at least one sensor signal, wherein the sensor signal comprises at least one information of at least one area of the beam profile of the light beam, in response to an illumination of its respective light-sensitive area (140) by the light beam (122), wherein two of the optical sensors (138) are arranged in a manner that the light-sensitive areas (140) of the two optical sensors (138) differ in at least one of: their longitudinal coordinate, their spatial offset, or their surface areas;
and at least one evaluation device (150), wherein the evaluation device (150) is configured to determine and/or to select a first area of the beam profile and a second area of the beam profile, wherein the first area of the beam profile comprises essentially edge information of the beam profile and the second area of the beam profile comprises essentially center information of the beam profile for generating an output by monitoring at least one change of, firstly, the beam profile of the at least one light beam (122) upon traversing the at least one area of surveillance (124) by evaluating the sensor signals and, further, of at least one component of a location of the sender unit (114), wherein the component is determined with respect to the coordinate system of the transfer device (134), by evaluating a combined signal Q from the sensor signals.