US 12,480,759 B2
Stereoscopic measuring device for determining position information of an event location in an interstitial space from a reference point and method for determining position information of an event location in an interstitial space
Max Bergau, Freiburg (DE); Tobias Meinert, Freiburg (DE); and Benjamin Scherer, Oberried (DE)
Assigned to Endress+Hauser Group Services AG, Reinach (CH)
Filed by Endress+Hauser Group Services AG, Reinach (CH)
Filed on Dec. 22, 2022, as Appl. No. 18/145,135.
Claims priority of application No. 10 2021 134 446.8 (DE), filed on Dec. 23, 2021.
Prior Publication US 2023/0204347 A1, Jun. 29, 2023
Int. Cl. G01B 11/25 (2006.01)
CPC G01B 11/25 (2013.01) 13 Claims
OG exemplary drawing
 
1. A stereoscopic measuring device for determining position information of at least one event location in an interstitial space; comprising
a lighting assembly;
a background structure which has a background surface facing the lighting assembly;
an imaging apparatus; and
an evaluation apparatus;
wherein the interstitial space is disposed between the background surface and the lighting assembly;
wherein the lighting assembly is configured to illuminate the background surface across the interstitial space from a first lighting position and from at least one second lighting position, wherein the first lighting position has a defined lighting distance from the second lighting position,
wherein first light beams originating from the first lighting position and passing through an event location in the interstitial space, together with second light beams passing through the event location in the interstitial space and originating from the second lighting position, form an angle of not less than 1° such that a first projection location of the event location on the background surface generated by illumination of the background surface from the first lighting position has a projection location distance from a second projection location of the event location generated by illumination of the background surface from the second lighting position,
wherein the imaging apparatus is configured to image the first projection location and the second projection location in a spatially resolved manner,
wherein the evaluation apparatus is configured to detect an event, to determine the projection location distance, and to determine the position information of the event location on the basis of the projection location distance,
wherein the event location is a location at which an event occurs which comprises appearance of a medium to be detected, wherein, in a presence of the medium to be detected, an interaction of the medium to be detected with the first and second light beams changes at least one property of the first projection location and a property of the second projection location compared to reference conditions in which the medium to be detected is absent or effective in a different way.