Monitoring device for a fire alarm as well as fire annunciator with such a monitoring means

摘要

Monitoring device (1) for a fire alarm (10) for the detection of objects in the vicinity of the fire detector (10), wherein the monitoring device (1) a housing (2) and an electronic control unit (11), wherein said control unit (11) is arranged, in the case of a detected object in the vicinity of the fire detector (10) to output a warning message (w), characterized in - that at least two optical lenses (4) for the passage of ambient light into the interior of the housing on a radial outer side (ra) of the housing (2) or a radially outward position on an end face (st) of the housing (2) with respect to an axis of symmetry (a) of the fire detector (10) are arranged, - that the optical lenses (4) in each case an image sensor (3) in the housing (2) is arranged opposite to the optical imaging of a picture section in the vicinity of the fire detector (10) on the respective image sensor (3), and - that the control unit for data transmission to the image sensors (3) is connected and is set up for each of which is formed of two, preferably an opposite location detected image excerpts a 3d - reconstruction of the optically detected environment stereoscopic paths to be carried out, and is adapted to output the warning message (w), if a mathematically determined distance of an object of the 3d - reconstruction falls below a predetermined minimum distance.