Method and device for monitoring an elevator car door

A method and a device for monitoring an elevator car door acquire one or more distances based on light emitted toward the car door by a distance measuring device and reflected at the car door as a function of a current closed state of the car door. Information about the current closed state of the c...

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Bibliographic Details
Main Authors Tschuppert, Reto, Kusserow, Martin
Format Patent
LanguageEnglish
Published 21.03.2023
Subjects
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
GYROSCOPIC INSTRUMENTS
HAULING
HOISTING
LIFTING
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PERFORMING OPERATIONS
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
TRANSPORTING
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Summary:A method and a device for monitoring an elevator car door acquire one or more distances based on light emitted toward the car door by a distance measuring device and reflected at the car door as a function of a current closed state of the car door. Information about the current closed state of the car door is derived solely by comparing the acquired distance with a previously acquired reference distance, and a signal which represents the information can be fed to a remotely arranged control center. The monitoring device can be installed as a retrofit component that is capable of working autonomously in existing elevator systems, does not need to receive any data from a controller of the car door or the elevator system and only requires a relatively simple data processing device that only needs to carry out a comparison of detected distance values with reference values.
Bibliography:Application Number: US201816482321