A door system for an elevator system includes: a door frame framing a door opening and having a door jamb; and a monitoring unit mounted on the door frame and monitoring a region of the door opening. A region of the door frame has a retroreflective surface that extends over at least 20% of a height of the door jamb. The monitoring unit has a light source that illuminates the retroreflective surface with light beams and a light sensor that measures the angle-resolved intensity of the light beams reflected by the retroreflective surface. The monitoring unit determines an output value based upon the angle-resolved intensity and detects when the angle-resolved intensity falls below a threshold intensity for at least one angle. The output value includes whether there is an obstacle in the monitored region.
TÜRSYSTEM FÜR EINE AUFZUGSANLAGE
DOOR SYSTEM FOR A LIFT INSTALLATION
SYSTÈME DE PORTE POUR INSTALLATION D'ASCENSEUR
2024-10-30
Patent
Electronic Resource
German
IPC: | B66B Aufzüge , ELEVATORS |